Manufacturing method of integral structure of inner and outer pipes, integral fixing holding jig for inner and outer pipes, and tilt angle adjustment jig

Abstract

The method includes the steps of forming a pair of through slits (18) and a female screw portion (72) in the outer tube of an inner tube (12) and an outer tube (14) that are fitted together, preparing a pressing portion (22) having a U-shaped cross section and a clearance hole portion (32) that penetrates the pair of through slits and can be pressed against the inner tube at two points, and a tightening screw portion (24) having a male screw portion (26) that can be screwed into the female screw portion and a torque applying grip (132), and manually tightening the tightening screw portion (24) through the torque applying grip at a predetermined fitting position. a step of fixing the inner and outer tubes together in the longitudinal direction of the tubes while forming an overall length adjustment jig for the inner and outer tubes, an inclination angle adjustment jig by adjusting the fitting position of the inner and outer tubes, or a fixed support jig for a stand that supports and fixes heavy objects, by tightening the tightening screw portion with force to screw the male threaded portion into the female threaded portion through the clearance hole portion, and pressing and fixing the pressing portion against the inner tube and pressing and fixing the inner tube against the outer tube.

Description

[Technical field]

[0001] The present invention relates to a method for manufacturing an integrated structure of inner and outer tubes, a jig for fixing and holding the inner and outer tubes together, and a tilt angle adjustment jig, and more specifically, to a method for manufacturing an integrated structure of inner and outer tubes equipped with a fixing support jig that can be firmly supported by hand alone, and a tilt angle adjustment jig that has a simple structure and can adjust the predetermined tilt angle direction of a heavy object by adjusting the fitting position of the inner tube and the outer tube with easy operation without requiring excessive tightening force. [Background technology]

[0002] Conventionally, inner and outer tube components in which the overall length of the inner and outer tubes can be adjusted by adjusting the fitting length of the inner and outer tubes that fit together have been used for a variety of purposes, such as stands that support daily necessities at a desired height, clothes drying poles, suction tubes for vacuum cleaners, and height adjustment of bicycle saddles. Such length-adjustable inner and outer tube components are usually manually adjusted to adjust the length of the stand, the length of the pole depending on the number of laundry loads, or the height of the saddle by adjusting the fitting length of the inner tube relative to the outer tube. More specifically, the outer peripheral surface of one end of the inner tube is fitted to the inner peripheral surface of the outer tube from the opening of one end of the outer tube. After the fitting length is appropriately adjusted, a fastening screw having a male threaded portion which screws into the female threaded portion of a circular through hole provided on the outer peripheral surface of the outer tube is rotated so that the tip of the male threaded portion comes into contact with the outer peripheral surface of one end of the inner tube and is tightened and fixed, thereby fixing the fitting length. In some cases, by tightening and fixing in this manner, the inner and outer tubes can be arranged vertically, and the inner or outer tube can support a heavy object and hold the heavy object at a predetermined height, making it possible to use the inner and outer tubes as a stand.

[0003] However, such conventional length adjusting jigs for the inner and outer tubular members have the following technical problems. First, even if it is possible to adjust the length of the inner and outer tubular members, it is difficult to maintain the adjusted length of the inner and outer tubular members. However, this is where it falls short. More specifically, since the fastening screw is screwed into the female threaded portion of the outer tube by rotating the male thread around the longitudinal direction, even if the tip of the fastening screw portion is shaped to follow the curved shape of the outer peripheral surface of the inner tube, depending on the rotational position of the tip when it hits the outer peripheral surface of the inner tube, the tip of the fastening screw portion and the outer peripheral surface of the inner tube may just happen to be in surface contact with each other. When the inner and outer tubes have a curved outer peripheral surface, such as a circular cross section, there is point or line contact between the tip of the fastening screw and the outer peripheral surface of the inner tube, resulting in insufficient fixation of the inner tube to the outer tube and making it difficult to maintain the length of the inner and outer tube components.

[0004] Secondly, when used as a stand to support heavy objects, the tightening and fixing force is insufficient. This can cause the mating lock to suddenly come loose, causing heavy objects to fall. More specifically, the weight of the heavy object is supported by the frictional force between the tip of the male threaded portion of the fastening screw portion and the outer peripheral surface of the inner tube at the mating position, but the resistance of the tip of the male threaded portion to the outer peripheral surface of the inner tube, which constitutes part of the frictional force, may decrease over time due to loosening of the screw, etc. However, in order to cover up insufficient fixing and holding, for example when supporting a heavy object such as a stand, tightening multiple fastening screws individually takes time and effort, is inconvenient and impractical, and when trying to ensure the tightening fixing force, the tip of the male threaded portion may leave a mark or dent on the outer peripheral surface of one end of the inner tube, which may cause deterioration from both functional and aesthetic standpoints. In particular, in the case of inner and outer pipes made of resin, the tightening and fixing force is too strong, which may cause the outer circumferential surface of the inner pipe to crack or break.

[0005] Thirdly, for example, the inner and outer tubes facing vertically are relatively long and cannot support heavy loads. When the thickness of the pipe, particularly the outer pipe, is thick, as in the case of a screw thread, the male thread must penetrate the thickness of the outer pipe to reach the outer peripheral surface of the inner pipe, which naturally requires a longer male thread, and therefore requires more time and effort to screw in, making it inconvenient and impractical. As described above, even if the fitting length between the inner and outer tubes can be adjusted by screwing the fastening screw into the outer tube from the outer surface side of the outer tube and fixing the tip portion to the outer peripheral surface of the inner tube, this can only be said to be useful for very limited applications, including the practicality of adjusting the fitting length between the inner and outer tubes itself.

[0006] In this regard, a length adjustment jig for inner and outer tube members is known, which adjusts the length of the inner and outer tube members by providing a pair of overhanging flanges facing each other in the longitudinal direction of the outer tube, tightening the threaded parts against the female threaded parts of each overhanging flange to narrow the clearance between the pair of overhanging flanges, and thereby pressing the inner peripheral surface of the outer tube against the outer peripheral surface of the inner tube. With this type of length adjustment jig for inner and outer tube members, the tip of the threaded part does not come into contact with the outer peripheral surface of the inner tube, and the inner peripheral surface of the outer tube is pressed against the outer peripheral surface of the inner tube, but it is difficult to obtain a sufficient tightening force from the threaded parts. More specifically, the screw portion has a head portion and a male screw portion extending from the head portion, and a tightening force is applied by turning the head portion with fingers, but since the head portion is provided near the outer surface of the outer tube, it is difficult to expand the diameter, and it is difficult to apply force because it is turned by pinching it with fingers rather than gripping it with a hand. By providing a long shank portion to the screw portion, it is possible to expand the diameter of the head portion away from the outer surface of the outer tube, but this looks bad in appearance and is not preferable in terms of design.

[0007] Furthermore, a length adjustment jig for the inner and outer tube members is known in which, similar to the above, a screw having a male thread is screwed into the female thread of the outer tube to adjust the length of the inner and outer tube members, but in which a protrusion that protrudes outward is provided on the outer tube, a spacer is placed in the internal space formed by the protrusion, and the spacer is fixed to the outer peripheral surface of the inner tube by the tightening force of the screw via the spacer. With this type of length adjustment jig for the inner and outer tube components, the tip of the threaded portion does not come into direct contact with the outer peripheral surface of the inner tube, but rather the inner peripheral surface of the outer tube is indirectly pressed against the outer peripheral surface of the inner tube. However, as described above, in order to provide the outer tube with a protrusion that protrudes outward, this cannot be done by lathe processing, so a processing method such as lost wax casting is required, and this results in an unattractive appearance and is not desirable from the standpoint of design.

[0008] The above points are technical issues that apply not only to length adjustment jigs for inner and outer pipe fitting members and weight support jigs using inner and outer pipe fitting members, but also to tilt angle adjustment jigs that use inner and outer pipe fitting members to rotatably connect the inner and outer pipes via a pivot and adjust the relative tilt angle by adjusting the fitting position of the inner and outer pipes. Here, the jig that adjusts the position of the fitting portion of the inner and outer tubes and fixes and holds the fitting portion is one element of the integrated structure of the inner and outer tubes, and when viewed from the perspective of the inner and outer tubes as a whole, it is also a length adjustment jig for the overall length of the inner and outer tubes. In that the inner and outer tubes are fixed and held as a single unit in the longitudinal direction of the tubes, it is also a jig for fixing and holding the inner and outer tubes as a single unit. In the case where the inner and outer tubes are oriented in the vertical direction and either the inner or outer tube supports a heavy object, it is also a fixed support jig using the inner and outer tubes. It is clear that, depending on the application, the integrated structure of the inner and outer tubes can be used as general stands for music, medical, etc., component frames for mobile objects such as bicycles and carts, framework frames for temporary tents and temporary construction scaffolding, etc., walking sticks, shovels, earthquake countermeasures braces, etc. DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0009] In view of the above technical problems, an object of the present invention is to provide a manufacturing method for an integrated structure of inner and outer pipes, which is equipped with a fixing support jig that can be firmly supported by hand force alone, and a fixing and holding jig for fixing the inner and outer pipes together. In view of the above technical problems, an object of the present invention is to provide a method for manufacturing an integrated structure of inner and outer tubes, and a tool for fixing and holding the inner and outer tubes together, which has a simple structure and allows the overall length of the inner and outer tubes to be adjusted with easy operation. In view of the above technical problems, the object of the present invention is to provide a manufacturing method for an integrated structure of inner and outer tubes, which allows the height position of a heavy object to be adjusted by adjusting the overall length of the inner and outer tubes with a simple structure and easy operation when supporting a heavy object at a predetermined height through the fitting structure of the inner and outer tubes, and a jig for fixing and holding the inner and outer tubes together. In view of the above technical problems, the object of the present invention is to provide a manufacturing method for an integrated structure of inner and outer tubes, which can adjust the inclination angle of a heavy object by adjusting the fitting position of the inner tube and the outer tube with a simple structure and easy operation, when a heavy object is supported at a predetermined inclination angle by either the inner tube or the outer tube through the fitting structure between the inner tube and the outer tube, and a jig for fixing and holding the inner and outer tubes together. [Means for solving the problem]

[0010] In order to achieve the above object, the method for manufacturing an integral structure of an inner and outer tube of the present invention comprises the steps of: A step of machining, 3D printer modeling, or lost wax processing a pair of through slits and a female screw portion on an outer surface of a solid or hollow inner tube and a hollow outer tube that fit together, the outer surface corresponding to the fitting portion of the outer tube; a pressing portion having a U-shaped cross section, the pressing portion having a clearance hole, the pressing portion penetrating from outside the outer surface into the pair of through slits and capable of being pressed against the outer circumferential surface of the inner tube in a tight contact manner by surface contact at two points, and a tightening screw portion having a female screw portion capable of being screwed into the female screw portion and a torque applying grip for applying rotation around the extension direction of the male screw portion, the torque applying grip having a diameter selected according to the support load so that the load can be firmly supported by hand force alone, and a step of fixing the inner tube and the outer tube together in the longitudinal direction of the tubes while constituting an overall length adjustment jig for the inner and outer tubes, or an inclination angle adjustment jig which rotatably connects the inner tube and the outer tube via a pivot and adjusts the fitting position of the inner tube and the outer tube, or an inner and outer tube integrally fixing and holding jig which holds the inner and outer tubes together, or a fixed support jig for a stand which supports and fixes a heavy object with either the inner or outer tube.

[0011] According to the manufacturing method for the integral structure of the inner and outer tubes having the above-mentioned configuration, when preparing the inner and outer tubes which fit together, the pressing portion having a clearance hole, and the fastening screw portion having a female screw portion and a torque applying grip which can be screwed into the female screw portion, the diameter of the torque applying grip is selected according to the support load determined according to the application of the integral structure of the inner and outer tubes as a length adjustment jig, an inclination angle adjustment jig, or a fixed support jig for a stand, and at a predetermined fitting position of the inner and outer tubes, the fastening screw portion is tightened by hand force via the torque applying grip to screw the male screw portion into the female screw portion through the clearance hole, thereby pressing and fixing the pressing portion toward the outer circumferential surface of the inner tube in a surface contact manner. By pressing and fixing the outer peripheral surface of the inner tube opposite the surface contact portion of the pressing portion with the inner tube against the inner peripheral surface of the outer tube, it is possible to construct an overall length adjustment jig for the inner and outer tubes, or an inclination angle adjustment jig that rotatably connects the inner tube and outer tube via a pivot and adjusts the fitting position of the inner tube and outer tube, or an inner and outer tube integrally fixing and holding jig that fixes and holds the inner and outer tubes together, or a fixed support jig for a stand that supports and fixes a heavy object with either the inner or outer tube, and completing the process by fixing the inner and outer tubes together in the longitudinal direction of the tubes, it is possible to provide a manufacturing method for an integrated structure of inner and outer tubes that can firmly support the inner and outer tubes together using only manual force, depending on various applications.

[0012] In order to achieve the above object, the inclination angle adjustment jig of the present invention comprises: a tubular portion having an outer circumferential surface including a female screw portion and at least one through hole within a predetermined range from the female screw portion; a first support bar extending at a fixed predetermined angle with respect to the extension direction of the tubular portion and having a lower end grounded; and a pivot connecting an upper end of the first support bar to the tubular portion, the upper end of the first support bar being connected and fixed to the tubular portion so as to be rotatable about the pivot; a second support bar that is slidably fitted into the tubular portion, extends along the extension direction of the tubular portion, and has a lower end that is grounded; At least one pressing portion that penetrates the through hole from the outer peripheral surface of the tubular base portion and abuts against the outer peripheral surface of the second support bar; a tightening screw portion capable of pressing and fixing the pressing portion against an outer circumferential surface of the second support bar, The tip surface of the pressing portion is shaped to conform to the outer circumferential surface of the second support bar so as to be in surface contact with the outer circumferential surface of the second support bar, The fastening screw portion has a male screw portion that can be screwed into the female screw portion, the pressing portion has a clearance hole through which the male screw portion can pass, By moving the first support bar within the plane formed by both support bars so that the distance between the lower ends of both support bars changes, the upper end of the first support bar rotates around the pivot axis relative to the tubular portion while adjusting the fitting position of the tubular base portion relative to the second support bar, and then the tightening screw portion screws the male threaded portion into the female threaded portion through the clearance hole, while the pressing portion penetrates the through hole and presses and fixes the tip surface against the outer circumferential surface of the second support bar in a surface contact manner, thereby making it possible to adjust the inclination angle of the second support bar relative to the ground surface.

[0013] According to the inclination angle adjustment jig having the above configuration, the second support bar is fitted into the tubular portion so as to be movable in the longitudinal direction of the tube, and the first support bar is connected to the tubular portion via a pivot and is rotatable about the pivot, the outer peripheral surface of the tubular portion is provided with a female screw portion and at least one through hole within a predetermined range from the female screw portion, and has at least one pressing portion that passes through the through hole from the outer peripheral surface of the tubular base portion and abuts against the outer peripheral surface of the second support bar, and a fastening screw portion that can press and fix the pressing portion against the outer peripheral surface of the second support bar, and the tip surface of the pressing portion is shaped to follow the outer peripheral surface of the second support bar so as to be in surface contact with the outer peripheral surface of the second support bar. The tightening screw portion has a male threaded portion that can be screwed into the female threaded portion, and the pressing portion has a clearance hole through which the male threaded portion can pass. Therefore, by moving the first support bar within the plane formed by both support bars so that the distance between the lower ends of both support bars changes, the upper end of the first support bar rotates around the pivot axis relative to the tubular portion while adjusting the fitting position of the tubular base portion relative to the second support bar. Then, the tightening screw portion screws the male threaded portion into the female threaded portion via the clearance hole, while the pressing portion passes through the through hole, and the tip surface is pressed and fixed in a surface contact manner against the outer peripheral surface of the second support bar. This makes it possible to adjust the inclination angle of the second support bar with respect to the contact surface with the ground by simple structure and easy operation without requiring excessive tightening force; for example, the inclination angle of the rectangular surface when a rectangular heavy object is supported by the second support bar. Furthermore, the fastening screw portion may have a male thread, and the outer tube may be formed with a female thread into which the male thread can be screwed.

[0014] Furthermore, each of the tubular portions further has a pair of opposing overhanging flanges that overhang from its outer surface in a direction intersecting the extension direction of the tubular portion, each of the pair of overhanging flanges having a first through hole capable of receiving a corresponding end of the pivot, the upper end of the first support bar has a second through hole through which the pivot can pass in a direction intersecting the extension direction of the first support bar, the upper end of the first support bar is positioned between the pair of overhanging flanges so that the first through hole and the second through hole are aligned, and the pivot is provided through each of the first through holes and the second through hole.

[0015] In addition, the tilt angle adjuster according to claim 1 is provided as a pair so that the planes defined by both the support bars are parallel to each other, Each of the opposing edges of the rectangular plate-shaped weight is supported by the second support bar of each of the tilt angle adjustment devices, and is supported at four points by the lower ends of the first support bar and the second support bar of each of the tilt angle adjustment devices, It is also possible to provide a device for supporting and adjusting the inclination angle of a rectangular plate-shaped weight object, in which the inclination angle of the rectangular surface of the rectangular plate-shaped weight object is adjusted by adjusting the fitting position of each of the tubular base parts of the inclination angle adjustment devices relative to the corresponding second support bars, thereby adjusting the inclination angle of each of the corresponding second support bars of the inclination angle adjustment devices.

[0016] In order to achieve the above object, the method for manufacturing an integral structure of an inner and outer tube of the present invention comprises the steps of: A step of machining, 3D printer modeling, or lost wax processing a pair of through slits on an outer surface of a solid or hollow inner tube and a hollow outer tube that fit together, the outer surface corresponding to the fitting portion of the outer tube; a press plate having a load receiving surface that receives a load toward the inner tube, and a pair of press bodies each extending from the opposite surface of the load receiving surface toward the opposite surface of the load receiving surface, wherein in a stage of preparing a press plate having a press surface at a tip portion that can come into contact with the outer circumferential surface of the inner tube, each of the pair of press bodies is set such that a first angle of the pair of press bodies relative to the load receiving surface in the extension direction toward the tip portion is different from a second angle of the corresponding through slit relative to the outer circumferential surface of the inner tube in the extension direction thereof so that each of the pair of press bodies can be pressed in by forming a guide surface on the inner side or the outer side of the corresponding through slit for each of the pair of press bodies; a bending rigidity at the tip of each of the pair of pressing bodies is set according to a material of the pressing plate, a length to a tip of each of the pair of pressing bodies, and an area of ​​each of the pressing surfaces, so that the first angle can be changed by deformation of each of the pair of pressing bodies by manual force and the pressing bodies can be pressed into the corresponding through slit; The method includes the steps of manually pressing and fixing the pressing portion against the outer peripheral surface of the inner tube in a surface contact manner at a predetermined fitting position, and pressing and fixing the outer peripheral surface of the inner tube opposite the surface contact portion of the pressing portion with the inner tube against the inner peripheral surface of the outer tube, thereby forming an overall length adjustment jig for the inner and outer tubes, or an inclination angle adjustment jig that rotatably connects the inner tube and outer tube via a pivot and adjusts the fitting position of the inner tube and outer tube, or an inner and outer tube integral fixing and holding jig that fixes the inner and outer tubes together, or a fixed support jig for a stand that supports and fixes a heavy object with either the inner or outer tube, and completing the step of fixing the inner tube and outer tube together in the longitudinal direction of the tubes.

[0017] The pressing plate may have a U-shaped cross section along the extension direction of the inner and outer tubes, and the pair of through slits may have V-shaped cross sections along the extension direction of the inner and outer tubes. Furthermore, the pressing plate may have a U-shaped cross section along the extension direction of the inner and outer tubes, and the pair of through slits may have a curved V-shaped cross section along the extension direction of the inner and outer tubes. Furthermore, the pressing plate may have a V-shaped cross section along the extension direction of the inner and outer tubes, and the pair of through slits may have a U-shaped cross section along the extension direction of the inner and outer tubes. In addition, the pressing plate may have a curved V-shaped cross section along the extension direction of the inner and outer tubes, and the pair of through slits may have a U-shaped cross section along the extension direction of the inner and outer tubes. The pressing plate may have a V-shaped cross section along the extension direction of the inner and outer tubes, and the pair of through slits may have V-shaped cross sections along the extension direction of the inner and outer tubes. Furthermore, the pressing plate may have a U-shaped cross section along the extension direction of the inner and outer tubes, and the pair of through slits may have a U-shaped cross section along the extension direction of the inner and outer tubes.

[0018] Furthermore, the pair of pressing bodies are configured in a mutually intersecting direction, and the bending rigidity at the tip of the pressing body is set according to the material of the pressing plate, the length to the tip of each of the pair of pressing bodies, and the area of ​​each pressing surface, so that the first angle can be changed for either one or both of the pressing bodies by deforming each of the pair of pressing bodies by manual force, thereby enabling the pressing body to be pressed into the corresponding through slit.

[0019] In order to achieve the above object, the present invention provides a jig for integrally fixing an inner and outer tube, comprising: a pressing plate having a load receiving surface that receives a load toward the inner tube and a pair of pressing bodies each extending from a surface opposite to the load receiving surface toward the opposite surface of the load receiving surface when the outer tube is fitted onto the inner tube so as to be movable relative to the inner tube in the longitudinal direction of the tube, each of the pair of pressing bodies having a pressing surface at a tip portion that can come into contact with an outer peripheral surface of the inner tube; The outer tube has a pair of through slits extending in a thickness direction and through which one of the pair of pressing bodies can pass, The pair of pressing bodies are spaced apart from each other so that at least a portion of each pressing surface is positioned within an opening formed in the outer circumferential surface of the outer tube of the corresponding through slit, a first angle of each of the pair of pressing bodies relative to the load bearing surface in the extending direction toward the tip end thereof is set to be different from a second angle of each of the pair of pressing bodies relative to the outer circumferential surface of the inner tube in the extending direction of the corresponding through slit, so that each of the pair of pressing bodies can be press-fitted by forming a guide surface in the inner circumferential surface of the corresponding through slit; The bending rigidity at the tip of each of the pair of pressing bodies is set according to the material of the pressing plate, the length to the tip of each of the pair of pressing bodies, and the area of ​​each of the pressing surfaces, so that the first angle can be changed by deformation of each of the pair of pressing bodies by manual force and the pair of pressing bodies can be pressed into the corresponding through slit; As a result, when a load is applied, the pressing surface abuts against the outer peripheral surface of the inner tube, making the outer tube unable to move relative to the inner tube in the longitudinal direction of the tube, and when the load is removed, the outer tube can move relative to the inner tube in the longitudinal direction of the tube, but the pair of pressing bodies are pressed and held in the pair of through slits by their elastic restoring force to their original shape.

[0020] In order to achieve the above object, the present invention provides a jig for integrally fixing an inner and outer tube, comprising: A fixing and holding jig that is interposed between an inner tube and an outer tube that are fitted together and that fixes and holds the inner and outer tubes, The outer surface of the outer tube is provided with a pair of spaced apart through slits, At least one pressing portion that passes through the through slit from the outer peripheral surface of the outer tube and contacts the outer peripheral surface of the inner tube, the pressing portion has a pair of pressing bodies spaced apart from each other and capable of pressing against the outer circumferential surface of the inner tube by surface contact at two points, and a load receiving surface that presses the pair of pressing bodies against the outer circumferential surface of the inner tube, the pair of pressing bodies each have a pressing end surface capable of being pressed against an outer circumferential surface of the inner tube, and of the pair of pressing bodies, the pressing body closer to the end of the outer tube on the side of the fitting portion between the outer tube and the inner tube has an insertion hole formed in a thickness direction of the pressing body from a side closer to the end of the outer tube among a pair of opposing side surfaces constituting the pressing body; a narrow hole having a circular cross section and having a circular opening on the end surface of the outer tube on the side of the fitting portion, the narrow hole having a circular cross section and extending through the end surface to the side surface on the side closer to the end of the outer tube; a plug rod insertable through the circular opening into the slot; By inserting the pair of pressing bodies into the pair of through slits, the elongated hole communicates with the insertion hole, and by inserting the tip of the insertion rod into the insertion hole, the pair of pressing bodies are held within the pair of through slits. The slot has a female thread, the insertion rod is a set screw that can be screwed into the female threaded portion of the slot; It is preferable that the set screws are threaded into the elongated holes while their tip portions are inserted into the insertion holes, so that the pair of pressing bodies are detachably held within the pair of through slits.

[0021] Furthermore, it is preferable that the first elongated hole has an elliptical cross section elongated vertically in the direction of movement of the pressing body so that the pressing body can move within a predetermined range when the set screw is inserted into the insertion hole. Furthermore, it is preferable that the female screw portion is provided in the elongated hole from the vicinity of the side surface close to the end of the outer tube to the side surface.

[0022] In order to achieve the above object, the present invention provides a jig for integrally fixing an inner and outer tube, comprising: A fixing and holding jig that is interposed between an inner tube and an outer tube that are fitted together and that fixes and holds the inner and outer tubes, The outer surface of the outer tube is provided with a pair of spaced apart through slits, At least one pressing portion that passes through the through slit from the outer peripheral surface of the outer tube and contacts the outer peripheral surface of the inner tube, the pressing portion has a pair of pressing bodies spaced apart from each other and capable of pressing against the outer circumferential surface of the inner tube by surface contact at two points, and a load receiving surface that presses the pair of pressing bodies against the outer circumferential surface of the inner tube, each of the pair of pressing bodies includes a pressing end surface capable of being pressed against an outer circumferential surface of the inner tube, and further includes a pressing lever having an annular peripheral surface that rotates about an axis parallel to the load receiving surface while contacting the load receiving surface; The annular circumferential surface is curved such that a radius from an axis line increases from a first radius to a second radius, The pair of pressing bodies can move in the thickness direction of the corresponding through slits by rotating the pressing lever, By rotating the pressing lever about an axis provided at a predetermined height from the outer circumferential surface of the outer tube, the pressing body is pressed against the pressing member at a rotation position corresponding to an intermediate radius between the first radius and the second radius. starts to press against the outer peripheral surface of the inner tube, and at a rotational position corresponding to the second radius, the pressing body stops pressing against the outer peripheral surface of the inner tube, bringing the pressing end face into surface contact with the outer peripheral surface of the inner tube, and pressing and fixing the outer peripheral surface of the inner tube on the opposite side of the surface contact portion of the pressing end face with the inner tube against the inner peripheral surface of the outer tube.

[0023] The pair of through slits may be provided in a tubular base portion that is attached and fixed to the outer circumferential surface of one end of the outer tube, and the inner tube may be fitted to the outer tube via the tubular base portion. a pivot fixed to the pin and extending parallel to the outer circumferential surface; The pressing lever has a rotating part that is pivotally supported on the pivot shaft and a grip part that extends from an outer edge of the rotating part, The pivot portion may preferably have an annular peripheral surface which abuts against the load bearing surface.

[0024] Furthermore, it is preferable that the rotating part is pivotally supported on the pivot so that when the pressing lever rotates to a position corresponding to the intermediate radius, the direction connecting the tip of the grip part and the pivot shaft is in a substantially upright position, and when the pressing lever rotates to a position corresponding to the second radius, the direction connecting the tip of the grip part and the pivot shaft is in a pressed-down position. In addition, the rotating portion may have an annular peripheral surface that has the second radius over a predetermined central angle range with respect to the pivot axis in accordance with a desired pressing force applied to the outer peripheral surface of the inner tube by the pair of pressing bodies. Also, it is preferable that the pin is screwed and fixed to the outer peripheral surface of the outer tube or the tubular base portion, and the height of the pivot shaft is adjustable by adjusting the amount of screwing. Furthermore, the rotating part has a notch in a direction intersecting the pivot axis and is provided with a pair of rotating parts facing each other through the notch, the pin is arranged within the notch and has a first through hole through which the pivot axis can pass, and each rotating part has a second through hole through which the pivot axis can pass rotatably, and the first through hole and the second through hole can be aligned and positioned so that the pivot axis can pass through. Furthermore, the annular peripheral surface may be elliptical, with the major axis of the ellipse constituting the second radius.

[0025] In addition, the stand may be a music stand in which a music stand is fixedly supported by either the inner or outer tube, and a fixing support jig for the inner or outer tube as described in any one of claims 1, 5, 6, 15, 16, and 20 is provided at the fitting portion between the inner or outer tube or between the inner tube and a tubular base portion which is attached and fixed to the outer peripheral surface of one end of the outer tube. In addition, the table body may be fixedly supported to either the inner or outer tube, and the inner or outer tube or the inner tube and a tubular base portion attached and fixed to the outer peripheral surface of one end of the outer tube form the legs of the table body, and the fitting portion of the inner and outer tubes may have a fixing support jig for the inner and outer tubes described in any one of claims 1, 5, 6, 15, 16, and 20. Furthermore, the saddle and / or the handle are fixedly supported on either the inner or outer tube, The vehicle may have a fixing support jig for inner and outer tubes described in any one of claims 1, 5, 6, 15, 16, and 20 at a fitting portion between the inner tube and a tubular base portion that is attached and fixed to the outer peripheral surface of one end portion of the outer tube.

[0026] Furthermore, in a frame for a temporary tent in which a three-dimensional framework is formed by fitting multiple sets of inner and outer tubes together, the frame may have a fixing support jig for the inner and outer tubes described in any one of claims 1, 5, 6, 15, 16, and 20 at the fitting portion between the inner and outer tubes or between the inner tube and a tubular base portion attached and fixed to the outer peripheral surface of one end of the outer tube. In addition, the U-shaped portion is fixedly supported at the tip of either the inner or outer tube, and the inner and outer tubes or the inner and outer tubes are connected to each other. The invention may also be a fork having a fixing support jig for inner and outer tubes as described in any one of claims 1, 5, 6, 15, 16, and 20 at a fitting portion with a tubular base portion which is attached and fixed to the outer peripheral surface of one end of the tube. The cart may have casters on one of the inner and outer tubes that fit together and a loading platform on the other, and have a fixing support jig for the inner and outer tubes described in any one of claims 1, 5, 6, 15, 16, and 20 at the fitting portion between the inner and outer tubes or between the inner tube and a tubular base portion that is attached and fixed to the outer peripheral surface of one end of the outer tube. BEST MODE FOR CARRYING OUT THEINVENTION

[0027] A first embodiment of the length adjusting jig 10 of the present invention will be described in detail below with reference to the drawings. As shown in Figures 1 to 6, the length adjustment jig 10 is generally composed of a pressing body 22 interposed between an inner tube 12 and an outer tube 14 which fit together, and having a pressing surface 54 which can be pressed against the outer peripheral surface 15 of the inner tube 12, and a tightening screw portion 24 which can press and fix the pressing portion 22 against the outer peripheral surface 15 of the inner tube 12. The length, thickness and cross-sectional shape of each of the inner tube 12 and the outer tube 14 can be selected according to the application, and as will be described later, the fitting length between the inner tube 12 and the outer tube 14 is adjusted so that the overall length of the inner tube 12 and the outer tube 14 can be adjusted.

[0028] For example, each of the inner tube 12 and the outer tube 14 is hollow cylindrical, and the outer tube 14 is fitted onto the inner tube 12 by inserting the inner surface 17 of the outer tube 14 from one end opening into one end opening of the outer surface 15 of the inner tube 12. When the outer tube 14 is fitted into the inner tube 12, a slight clearance may be provided between the inner peripheral surface 17 of the outer tube 14 and the outer peripheral surface 15 of the inner tube 12, as long as the outer tube 14 is fixed and held in the longitudinal direction relative to the inner tube 12 by the fastening screw portion 24 via the pressing body 22, as will be described later. The slight clearance is, for example, 0.05 mm to 0.1 mm. A pair of through slits 18 are provided on the outer circumferential surface 16 of the outer tube 14, spaced apart by a distance D. A female screw portion 20 is provided between the pair of through slits 18, and the distance D between the pair of through slits 18 may be selected according to the application of the length adjustment jig 10, as will be described later.

[0029] The pair of through slits 18 are provided so as to extend in the longitudinal direction of the inner and outer tubes 12, 14 at a predetermined interval from each other. More specifically, each of the pair of through slits 18 is an elongated opening, and the width of the opening need only be such that the pressing portion 22 can penetrate in the thickness direction. As will be described later, since the pressing body is fastened and fixed to the outer tube 14 via the fastening screw portion 24, there is no need for the pressing portion 22 to penetrate in a tight fit manner into the pair of through slits 18 provided on the outer peripheral surface 16 of the outer tube 14.

[0030] The pressing portion 22 is positioned on the outer circumferential surface 16 of the outer tube 14 and passes through a pair of through slits 18 so as to come into contact with the outer circumferential surface 15 of the inner tube 12 . More specifically, the male thread portion 26 of the tightening screw portion 24 forms a pressing body 34 having an approximately U-shaped longitudinal section, which is provided with a clearance hole portion 32 penetrating in the thickness direction and two pressing portions 22 extending in opposite directions from the clearance hole portion 32. The pressing body 34 has a central portion 48 in which the clearance hole portion 32 is provided, and each of the pair of pressing portions 22 has an inclined portion 56 extending downward from the entire corresponding end portion of the central portion 48, and each of the pair of pressing portions 22 extends from the entire lower end of the inclined portion 56, and a pressing surface 54 is provided on the lower surface 38. Each of the pressing surfaces 54, which is the tip surface of the pressing portion 22, is shaped to follow the outer circumferential surface 15 of the inner tube 12 so as to be in surface contact with the outer circumferential surface 15 of the inner tube 12. For example, if the outer circumferential surface 15 of the inner tube 12 is the outer surface of a cylinder, the pressing surface 54 has a cross section in the shape of an arc of that diameter. In this case, unlike the fastening screw portion 24, the pressing body 34 itself does not need to be rotated toward the outer circumferential surface 15 of the inner tube 12, so that it is possible to press the pressing surface 54 against the outer circumferential surface 15 of the inner tube 12 in a direction in which the arc-shaped cross section matches the outer circumferential surface 15 of the inner tube 12.

[0031] The pressing body 34 has a protrusion 42 on an upper surface 44, and the protrusion 42 is provided with a clearance hole 32. By screwing the male threaded portion 26 into the female threaded portion 20, the lower surface 38 of the shank portion 36 and the upper surface 44 of the protrusion portion 42 of the pressing body 34 come into contact, and the fastening screw portion 24 and the pressing body 34 are integrally pressed and fixed against the inner tube 12 and screwed into the outer tube 14. The pressing body 34 is positioned above the outer tube 14, and the male threaded portion 26 passes through the clearance hole portion 32 and is tightened against the female threaded portion 20, thereby making it possible to fix the outer tube 14 to the inner tube 12 via the pressing portion 22.

[0032] A contact surface 46 capable of contacting the outer circumferential surface 16 of the outer tube 14 is provided on the rear surface of the central portion 48 of the pressing body 34 . More specifically, a flat abutment surface 46 is provided around the lower end opening of the clearance hole portion 32, and the male threaded portion 26 is screwed into the female threaded portion 20 of the outer peripheral surface 16 of the outer tube 14 by the fastening screw portion 24 until the lower surface of the shank portion 36 abuts against the annular surface of the pressing body 34, so that the pressing surface 54 is tightened and fixed to the outer peripheral surface 15 of the inner tube 12 with the abutment surface 46 abutting against the outer peripheral surface 16 of the outer tube 14. As a result, the inner and outer tubes 12, 14 are fixed and held at a predetermined fitting length via the fastening screw portion 24 and the pressing body 34.

[0033] The fastening screw portion 24 is configured to be able to press and fix the pressing portion 22 against the outer peripheral surface 15 of the inner tube 12, and the fastening screw portion 24 has a shank portion 36 and a male threaded portion 26 extending downward from an underside 38 of the shank portion 36, the male threaded portion 26 being able to screw into the female threaded portion 20, and an annular surface 40 surrounding the male threaded portion 26 is formed on the underside 38. After adjusting the fitting position of the inner tube 12 relative to the outer tube 14, the male threaded portion 26 is screwed into the female threaded portion 20 using the tightening screw portion 24, while the pressing portion 22 is passed through a pair of through slits 18 and pressed and fixed against the outer peripheral surface 15 of the inner tube 12. The tightening screw portion 24 has a head portion 58 that can be held and rotated by fingers at the end of the shank portion 36 opposite the end on the male thread side. The diameter of the head portion 58 is preferably as large as possible so that it can be held and rotated with little force by fingers, and from the viewpoint of preventing slippage, it may be provided with a plurality of shallow grooves spaced apart in the circumferential direction. In this sense, the head portion 58 constitutes a torque applying grip 132 that applies rotation around the extension direction of the male thread portion 26.

[0034] As shown in FIG. 7, the male thread 26 of the fastening screw portion 24 is screwed into the female thread 20 of the outer tube 14. By this, the pressing end surface 54 is pressed against the outer peripheral surface of the inner tube 12 through the slit of the outer tube 14, and the inner tube 12 is moved until the part of the outer peripheral surface of the inner tube 12 on the opposite side in the diametric direction comes into contact with the inner peripheral surface of the outer tube 14. Through this, the inner tube 12 is firmly fixed and supported against the outer tube 14 by support at three points, namely, the two pressing end surfaces 54 (C2) and one line contact (C1) extending in the longitudinal direction of the tube. It will be held. In this case, by screwing the male threaded portion 26 into the female threaded portion 20, the lower surface 38 of the shank portion 36 and the upper surface 44 of the protrusion portion 42 of the pressing body 34 come into contact, and the fastening screw portion 24 and the pressing body 34 are integrally pressed and fixed against the inner tube 12 and screwed and fixed against the outer tube 14. In order to do this, the height H of the U-shape of the pressing portion 22 needs to be greater than the thickness of the outer tube 14 plus the clearance d between the inner and outer tubes 14. When a heavy object is fixed and supported at a predetermined height by the inner and outer tubes 14 extending in the vertical direction, the fixing and support effect is greater when the pair of pressing bodies 34 of the pressing section 22 are spaced apart in the extension direction of the inner and outer tubes 12, 14 than when they are spaced apart in the circumferential direction of the inner and outer tubes 12, 14. When the area of ​​the pressing end face 54 of the pressing body 34 is constant, the frictional force between the pressing end face 54 and the outer peripheral surface of the inner tube 12, which is based on the fastening force of the fastening screw section 24, is important for fixing and support, so it is preferable for the fastening force per unit area to be greater. In this sense, too, it is advisable to provide multiple pressing end faces 54.

[0035] Regarding the use of the length adjustment jig 10, a pair of through slits 18 are provided at a predetermined interval from each other in the longitudinal direction of the inner and outer tubes 12, 14, respectively extending in the circumferential direction of the inner and outer tubes 12, 14, the inner and outer tubes 12, 14 are oriented vertically, and either the inner or outer tube 12, 14 supports a heavy object at a predetermined height. In particular, when using the length adjustment jig 10 to adjust the fitting length of the inner and outer tubes 12, 14 extending in the vertical direction to fix and hold a heavy object at a predetermined height, from the standpoint of supporting the weight of the heavy object by the frictional force between the pressing surface of the pressing portion 22 and the outer peripheral surface 15 of the inner tube 12, the greater the resistance of the pressing surface of the pressing portion 22 against the outer peripheral surface 15 of the inner tube 12, i.e., the tightening force by the fastening screw portion 24, the more preferable it is.For this reason, strength sufficient to withstand large tightening forces is required, so that the pressing portion 22 and fastening screw portion 24, as well as the inner and outer tubes 12, 14 that constitute the length adjustment jig 10, are preferably made of metal. The length adjustment jig 10 may be used in a stand that supports everyday items at a predetermined height, or in a vehicle that supports a saddle at a predetermined height.

[0036] As a variant, the length adjustment jig 10 may be made of resin from the viewpoint of light weight, and in particular, even if a pair of slit portions and an opening for the female screw portion 20 are provided, it is preferable to ensure a certain thickness from the viewpoint of ensuring the strength around them. In this case, the pair of through slits 18 are preferably provided so as to extend in the circumferential direction of the inner and outer pipes 12, 14 at a predetermined interval from each other in the circumferential direction of the inner and outer pipes 12, 14, respectively. The length adjustment jig 10 is used, for example, in a clothesline pole for adjusting the overall length of the inner and outer tubes 12, 14. In the case of a clothesline pole, the overall length of the clothesline pole consisting of the inner and outer tubes 12, 14 can be adjusted according to the number of laundry to be hung by adjusting the fitting length of the inner and outer tubes 12, 14 using the length adjustment jig 10. From the standpoint of lightweightness, when the inner and outer tubes are made of resin, particularly when the inner tube is made of resin, the pressing surface of the pressing body is pressed against the outer peripheral surface of the inner tube when tightened with the fastening screw, and if the area of ​​the pressing surface is too small, the pressing pressure against the outer peripheral surface of the inner tube will increase, and even if the thickness of the inner tube is sufficient to prevent deformation of the inner tube itself when supporting the longitudinal load of the inner and outer tubes, the outer peripheral surface of the inner tube may be scratched or, in some cases, dented. Therefore, taking into consideration the hardness of the resin of the inner tube, it is preferable to adjust the area of ​​the pressing surface of the pressing body so that the pressing pressure is within a range that prevents damage to the outer peripheral surface of the inner tube even when the fastening screw is tightened by hand.

[0037] As a further modified example, as shown in Fig. 23, one of the pair of through slits 18 may be a vertical slit along the longitudinal direction of the inner and outer tubes 12, 14, and the other may be a horizontal slit along the circumferential direction of the inner and outer tubes 12, 14, and the pressing body may accordingly be a vertical pressing surface that can penetrate the vertical slit, and the other may be a horizontal pressing surface that can penetrate the horizontal slit. This allows not only support against the load applied in the longitudinal direction of the inner and outer tubes 12, 14 by the vertical pressing surface, but also the horizontal pressing surface to be used for suppressing the relative rotation of one of the inner and outer tubes 12, 14 with respect to the other around the longitudinal direction of the inner and outer tubes 12, 14. Alternatively, a pair of pressing bodies may be provided, and the other may be provided on the diametrically opposite side of the position provided on one of the inner and outer tubes 12, 14 without increasing the pressing area of ​​each of them.

[0038] As a further modification, as shown in Figs. 33 and 34, the inner and outer tubes 12, 14 are assumed to be fitted together. A plurality of holes 128 are provided on the outer surface of the inner pipe 12 at the joint, spaced apart from one another in the longitudinal direction of the pipe, at circumferential positions facing the female threaded portion 22 of the outer pipe 14. Each of the plurality of holes 128 has a size that allows the male threaded portion 26 of the fastening screw 24 to be inserted therein, and the male threaded portion 26 has a length sufficient to penetrate the thickness of the inner pipe 12 when the fastening screw 24 is screwed into the female threaded portion 20 of the outer pipe 14. As a result, when the inner and outer tubes 12, 14, which are fitted together, are fixed and supported, at the fitting position of the inner and outer tubes 12, 14, each of the pair of pressing bodies 34 of the U-shaped cross-section pressing portion 22 is passed through the corresponding through slits 18 of the outer tube 14, and the male threaded portion 26 of the fastening screw 24 is passed through the clearance hole 32 of the pressing portion 22 and screwed into the female threaded portion 20 provided on the surface of the outer tube 14.Since each of the pair of pressing surfaces 54 of the pressing portion 22, which are spaced apart in the longitudinal direction of the inner and outer tubes 12, 14, are shaped to conform to the outer peripheral surface 19 of the inner tube 12, they abut against the outer peripheral surface 19 of the inner tube 12 to fix and support the inner and outer tubes 12, 14, and the male threaded portion 26 of the fastening screw 24 is inserted into one of the multiple holes 128. The spacing between adjacent holes 128 is set so that when each pressing portion 22 is passed through the corresponding through slit 18 of the outer tube 14, the male threaded portion 26 of the fastening screw 24 is inserted into one of the multiple holes 128. For example, when using crutches, where a user adjusts the length of the cane so that the top of the cane rests against the armpit while holding the cane in the hand to support their weight, the crutches are required to have a load-bearing function as well as a length-adjustment function. In particular, if the load-bearing function is suddenly lost, the user may lose their balance and fall, which directly affects their physical safety, so it is necessary to ensure that the load-bearing function is completely reliable. In this embodiment, by selecting the hole 128 into which the male threaded portion 26 of the fastening screw 24 is inserted, the overall length of the inner and outer tubes 12, 14, i.e., the length of the wand, can be adjusted, and the inner and outer tubes 12, 14 are fixed and supported by the pressing portion 22, and the male threaded portion 26 of the fastening screw 24 is inserted and held in the hole 128.Therefore, even if the fixed support of the inner and outer tubes 12, 14 by the pressing portion is impaired due to an excessive load, it is possible to ensure a complete load supporting function.

[0039] As a further modified example, as shown in FIG. 35, the inner tube 1 of the assumed fitting portion of the inner and outer tubes 12 and 14 may be On the outer surface of inner pipe 12, a narrow groove 130 is provided in the longitudinal direction of the pipe at a circumferential position facing the female thread portion 22 of outer pipe 14. The narrow groove 130 has a width large enough to allow the male thread portion 26 of the fastening screw 24 to be inserted therein, and the male thread portion 26 has a length sufficient to penetrate the thickness of inner pipe 12 when fastening screw 24 is screwed into the female thread portion 20 of outer pipe 14. As a result, when the inner and outer tubes 12, 14, which are fitted together, are fixed and supported, at the fitting position of the inner and outer tubes 12, 14, each of the pair of pressing bodies 34 of the U-shaped cross-section pressing portion 22 is passed through the corresponding through slits 18 of the outer tube 14, and the male threaded portion 26 of the fastening screw 24 is passed through the clearance hole 32 of the pressing portion 22 and screwed into the female threaded portion 20 provided on the surface of the outer tube 14.Since each of the pair of pressing surfaces 54 of the pressing portion 22, which are spaced apart in the longitudinal direction of the inner and outer tubes 12, 14, are shaped to conform to the outer peripheral surface 19 of the inner tube 12, they abut against the outer peripheral surface 19 of the inner tube 12 to fix and support the inner and outer tubes 12, 14, and the male threaded portion 26 of the fastening screw 24 is inserted into the elongated groove 130. In this embodiment, the overall length of the inner and outer tubes 12, 14 is adjusted by adjusting the fitting positions of the inner and outer tubes 12, 14, and then the inner and outer tubes 12, 14 are fixed and supported by the pressing portion 22, and the male threaded portion 26 of the fastening screw 24 is inserted and held in the elongated groove 130. Therefore, when a load that would cause relative rotation around the longitudinal direction of the tubes is applied between the inner and outer tubes 12, 14, it is possible to prevent the occurrence of such relative rotation. From this viewpoint, the depth of the elongated groove 130 may be determined by cutting the outer circumferential surface 16 of the outer tube 14 .

[0040] According to the length adjusting jig having the above-mentioned configuration, the female thread portion 20, at least one through slit 18 within a predetermined range from the female thread portion 20, at least one pressing portion 22 penetrating the through slit 18 from the outer peripheral surface 16 of the outer tube 14 and contacting the outer peripheral surface 15 of the inner tube 12, and the fastening screw portion 24 capable of pressing and fixing the pressing portion 22 against the outer peripheral surface 15 of the inner tube 12 are respectively provided on the outer peripheral surface 16 of the outer tube 14. After adjusting the fitting position of the inner tube 12 relative to the outer tube 14, it is possible to adjust the fitting position of the inner tube 12 relative to the outer tube 14 by rotating the fastening screw portion 24, without providing a space to accommodate the pressing portion, which has an opening facing the inner surface 17 of the outer tube 14 and protrudes to the outside of the outer tube 14, and then by screwing in the fastening screw portion, the pressing portion 22 within a predetermined range from the female thread portion 20 is caused to penetrate the through slit 18, and the tip surface is pressed and fixed in a surface contact manner against the outer surface 15 of the inner tube 12.This simple structure makes it possible to adjust the overall length of the inner tube 12 and the outer tube 14 so that it can be fixed and held in place by simple operation without requiring excessive fastening force. In the above description, the inner and outer tubes 12, 14 have a circular cross section, and the pressing surface 54 of the pressing body 34 has an arc-shaped cross section the same as the diameter of the inner tube 12 so that it adheres to the outer surface of the inner tube 12. If the diameters of the inner and outer tubes 12, 14 are different, a pressing body 34 having a pressing surface 54 corresponding to the diameter is prepared. However, this is not limited to the above. If the inner and outer tubes 12, 14 have an equal or equal planar rectangular cross section, the pressing surface 54 of the pressing body 34 may have a planar cross section so that it adheres to the outer surface of the inner tube 12. This method can be used for inner and outer tubes 12, 14 having various rectangular cross sections.

[0041] A method for adjusting the length of the inner and outer tubes 12, 14, particularly in the case of existing inner and outer tubes 12, 14 that are fitted together, will be described below. A step of drilling a pair of spaced apart through slits 18 and a female screw portion 20 between the pair of through slits 18 on an outer peripheral surface 16 at one end of the outer tube 14; a step of preparing a pressing portion 22 which is positioned on the outer peripheral surface 16 of the outer tube 14, passes through a pair of through slits 18 and contacts the outer peripheral surface 15 of the inner tube 12, and a fastening screw portion 24 which has a male screw portion 26 which can be screwed into the female screw portion 20 and can press and fix the pressing portion 22 against the outer peripheral surface 15 of the inner tube 12; After adjusting the fitting position of the inner tube 12 relative to the outer tube 14, the male threaded portion 26 is screwed into the female threaded portion 20 using the tightening screw portion 24, while the pressing portion 22 is passed through a pair of through slits 18 and pressed and fixed against the outer peripheral surface 15 of the inner tube 12. According to the above method, by drilling a hole in one end of the outer tube 14 in the existing inner and outer tubes 12, 14, it is possible to universally adjust the overall length of the inner tube 12 and the outer tube 14 for the existing fitting structure between the inner tube 12 and the outer tube 14.

[0042] The second embodiment of the present invention will be described below. In the following description, components similar to those in the first embodiment are given the same reference numerals and their description will be omitted. Below, the characteristic parts of this embodiment will be described in detail with reference to Figs. 8 to 10. The second embodiment of the present invention is characterized in that it is a length adjustment jig 10 interposed between the inner tube 12 and outer tube 14 which are fitted to each other, and has a pressing portion 22 which passes through a pair of through slits 18 and comes into contact with the outer peripheral surface 15 of the inner tube 12, and a tightening screw portion 24 which can press and fix the pressing portion 22 against the outer peripheral surface 15 of the inner tube 12, and the tightening screw portion 24 has a male thread portion 26 which can be screwed into the female thread portion 20, which is common to the first embodiment, but while in the first embodiment a pair of through slits 18 was provided on the outer peripheral surface 16 of the outer tube 14 and a female thread portion 20 was provided between the pair of through slits 18, in this embodiment a tubular base portion 30 which is attached and fixed to one end of the outer tube 14 is provided, and a pair of through slits 18 spaced apart from each other and a female thread portion 20 provided between the pair of through slits 18 are provided on the outer peripheral surface 16 of the tubular base portion 30.

[0043] More specifically, the tubular base portion 30 is a hollow cylinder whose one end can be fitted onto one end 28 of the outer tube 14, and the inner tube 12 is inserted into the other end with a predetermined clearance between the outer peripheral surface 16 of the tubular base portion 30 and the inner tube 12. According to the above configuration, after adjusting the fitting position of the inner tube 12 relative to the tubular base portion 30, the male threaded portion 26 is screwed into the female threaded portion 20 using the tightening screw portion 24, while the pressing portion 22 is passed through a pair of through slits 18 and pressed and fixed against the outer peripheral surface 15 of the inner tube 12. The tubular base portion 30 may be attached and fixed to one end of the outer tube 14 by, for example, screws or by interference fit, so long as it is firmly fixed to the outer tube 14 . For existing inner and outer tubes 12, 14, a pressing portion 22 and a fastening screw portion 24 capable of pressing and fixing the pressing portion 22 against the outer peripheral surface 15 of the inner tube 12, as well as a tubular base portion 30 having a pair of through slits 18 and a female screw portion 20 between the pair of through slits 18 on the outer peripheral surface 16, make it possible to adjust the fitting length of the inner and outer tubes 12, 14.

[0044] The third embodiment of the present invention will be described below. In the following description, components similar to those in the first embodiment are given the same reference numerals and their description will be omitted. Below, the characteristic parts of this embodiment will be described in detail with reference to FIG. The third embodiment of the present invention is characterized by a tubular protrusion 65 provided on the outer peripheral surface of the outer tube 14. The length adjustment jig 10 is interposed between the inner tube 12 and outer tube 14 which are fitted together, and has a pressing portion 22 which passes through a pair of through slits 18 and comes into contact with the outer peripheral surface 15 of the inner tube 12, and a fastening screw portion 24 which can press and fix the pressing portion 22 against the outer peripheral surface 15 of the inner tube 12. The fastening screw portion 24 is similar to the first embodiment in that it has a male thread portion 26 which can be screwed into the female thread portion 20. However, whereas in the first embodiment, the outer peripheral surface 16 of the outer tube 14 has a pair of through slits 18 and the female thread portion 20 between them, in this embodiment, a tubular protrusion 65 is provided at a position corresponding to the female thread portion 20, facing outward perpendicular to the outer peripheral surface 16 of the outer tube 14. More specifically, the tubular projection 65 has a circular annular cross section with a predetermined height h, and is connected to the female screw portion 20. A female thread portion 20 is formed inside so as to be aligned with the female thread portion 20, and the male thread portion 26 of the fastening screw portion 24 can be screwed into the female thread portion 26. The tubular protrusion portion 65 may be fixed to the outer peripheral surface 16 separately from the outer tube 14, for example, by welding. The outer shape of the tubular protrusion portion 65 does not have to be cylindrical, and may be any shape as long as the female thread portion 20 is formed inside so as to be aligned with the female thread portion 20. This embodiment is effective when the thickness of the outer tube 14 is thin and the screw-in length of the male screw portion 26 cannot be sufficiently secured, and the predetermined height h may be determined from this viewpoint. As in the first embodiment, when the attachment portion 22 is pressed and fixed against the outer peripheral surface 15 of the inner tube 12, the length of the male thread portion 26 is set so that the tip of the male thread portion 26 does not come into contact with the outer peripheral surface 15 of the inner tube 12. Conversely, as a modified example, when the thickness of the outer tube 14 is large, the outer circumferential surface 16 of the outer tube 14 may be ground inwardly around the female thread portion 20 between the pair of through slits 18 to form a shallow groove portion (not shown) having a bottom surface, and a through hole having the female thread portion 20 on the bottom surface may be provided. The depth of the shallow groove portion, i.e., the depth to which the outer circumferential surface 16 is ground, may be appropriately set according to the thickness of the outer tube 14 and / or the length of the male thread portion 26. Regardless of the conditions of the pipes 12, 14 and the fastening screw portion 24, versatility can be ensured.

[0045] The fourth embodiment of the present invention will be described below. In the following description, components similar to those in the first embodiment are given the same reference numerals and their description will be omitted. Below, the characteristic parts of this embodiment will be described in detail with reference to Figs. 12 and 13. The fourth embodiment of the present invention is characterized by the fastening screw portion 24, which is a length adjustment jig 10 interposed between the inner tube 12 and outer tube 14 which are fitted together, and has a pressing portion 22 which passes through a pair of through slits 18 and comes into contact with the outer peripheral surface 15 of the inner tube 12, and a fastening screw portion 24 which is capable of pressing and fixing the pressing portion 22 against the outer peripheral surface 15 of the inner tube 12, which is common to the first embodiment. However, in the first embodiment, the fastening screw portion 24 has a male thread portion 26, and the outer peripheral surface 16 of the outer tube 14 has a pair of through slits 18 and a female thread portion 20 between the pair of through slits 18. However, in this embodiment, on the contrary, the fastening screw portion 24 has a nut portion 70 having a female thread portion 72, and the outer peripheral surface 16 of the outer tube 14 has a male thread portion 74. More specifically, the nut portion 70 has a female threaded portion 72 that can be screwed into the male threaded portion 74 penetrating through its center, and a shallow groove is provided on the outer peripheral surface to prevent slipping when tightening by hand. Meanwhile, at the position of the female threaded portion 20 on the outer peripheral surface 16 of the outer tube 14, the male threaded portion 74 is provided orthogonally facing outward relative to the outer peripheral surface 16 of the outer tube 14, and the female threaded portion 20 is omitted. The male threaded portion 74 may be fixed to the outer peripheral surface 16, for example, by welding. According to this embodiment, when the nut portion 70 is loosened, the pressing body 34 itself is maintained in a state inserted into the male thread portion 74 via the clearance hole 32. Therefore, it is possible to prevent the pressing body 34 itself from accidentally coming loose and falling apart when the fastening screw portion 24 is loosened, as in the first embodiment.

[0046] The fifth embodiment of the present invention will be described below. In the following description, components similar to those in the first embodiment are given the same reference numerals and their description will be omitted. Below, the characteristic parts of this embodiment will be described in detail with reference to FIG. The fifth embodiment of the present invention is characterized by a coil spring 76 provided between the outer peripheral surface 16 of the outer tube 14 and the pressing portion 22. The length adjustment jig 10 is interposed between the inner tube 12 and the outer tube 14 which are fitted together, and has a pressing portion 22 which passes through a pair of through slits 18 and contacts the outer peripheral surface 15 of the inner tube 12, and a fastening screw portion 24 which can press and fix the pressing portion 22 against the outer peripheral surface 15 of the inner tube 12. The fastening screw portion 24 is common to the first embodiment in that it has a male screw portion 26 which can be screwed into the female screw portion 20. However, in the first embodiment, such a coil spring 76 is not provided. More specifically, a coil spring 76 is provided which can be inserted into the male threaded portion 26 of the fastening screw portion 24 through the clearance hole 32 of the pressing portion 22 and has a diameter larger than the diameter of the female threaded portion 20, and the number of turns of the coil may be set appropriately according to the U-shaped height of the pressing portion 22. According to this embodiment, when the male threaded portion 26 of the tightening screw portion 24 is screwed into the female threaded portion 20, the pressing portion 22 is supported on the upper surface of the coil spring 76, so that the pressing end face 54 protrudes from the corresponding through slit 18 toward the outer peripheral surface 15 of the inner tube 12, making it possible to prevent the pressing portion 22 from getting in the way when moving the inner tube 12 relative to the outer tube 14 in the extension direction of the tubes in order to adjust the fitting position between the inner tube 12 and the outer tube 14. Furthermore, by increasing the biasing force of the coil spring 76, when the coil spring 76, which is provided between the outer peripheral surface 16 of the outer tube 14 and the pressing portion 22, is compressed, the pressing portion 22 is pressed upward toward the fastening screw portion 24, strengthening the screwed state between the male threaded portion 26 and the female threaded portion 20. It is also possible to prevent in advance, for example, the fastening screw portion 24 from loosening over time, causing the fixed support between the inner tube 12 and outer tube 14, which are fitted together, to become unstable.

[0047] The sixth embodiment of the present invention will be described below. In the following description, the same components as those in the first embodiment are given the same reference numerals and the description thereof will be omitted. Below, the characteristic parts of this embodiment will be described in detail with reference to Figs. 15 to 17. The sixth embodiment of the present invention is characterized by a protective plate 78 provided between the inner tube 12 and the outer tube 14. The sixth embodiment of the present invention is a length adjustment jig 10 interposed between the inner tube 12 and the outer tube 14 which fit together, and has a pressing portion 22 which passes through a pair of through slits 18 and contacts the outer peripheral surface 15 of the inner tube 12, and a fastening screw portion 24 which can press and fix the pressing portion 22 against the outer peripheral surface 15 of the inner tube 12. The fastening screw portion 24 is common to the first embodiment in that it has a male screw portion 26 which can be screwed into the female screw portion 20. However, in the first embodiment, such a protective plate 78 is not provided. More specifically, the protective plate 78 has a width W that is longer than the length of the pair of through slits 18, and a length L that is longer than the distance between the pair of through slits 18 in the extension direction of the inner and outer tubes 14, and is made of a material that is softer than the outer peripheral surface 15 of the inner tube 12. As shown in Figure 16, a shallow groove 80 of a size that allows the protective plate 78 to fit into is provided on the inner peripheral surface of the outer tube 14 in which the pair of through slits 18 are provided. When the protective plate 78 is fitted into the shallow groove 80, it protrudes slightly inward from the inner peripheral surface of the outer tube 14. When the fastening screw portion 24 is tightened, the pressing portion 22 is pressed and fixed against the outer peripheral surface 15 of the inner tube 12, so that the protective plate 78 is also crushed, and the pressing end face 54 comes into direct contact with the outer peripheral surface 15 of the inner tube 12, making it possible to prevent the outer peripheral surface 15 of the inner tube 12 from being scratched or dented. Furthermore, by making the protective plate 78 out of rubber, which has a high coefficient of friction, it is possible to ensure the frictional force between the protective plate 78 and the outer peripheral surface 15 of the inner tube 12, thereby further strengthening the fixed support between the inner tube 12 and the outer tube 14. Note that Figure 17 shows a modified example in which a pair of protective plates 82 are provided, and each protective plate 82 is arranged so that it can be fitted into the corresponding through slit 18. When the pressing portion 22 is pressed and fixed against the outer peripheral surface 15 of the inner tube 12, each protective plate 82 is also crushed, preventing the outer peripheral surface 15 of the inner tube 12 from being scratched or dented, and ensuring friction between the protective plates 82 and the outer peripheral surface 15 of the inner tube 12. However, the shallow groove 80 provided on the inner surface of the outer tube 14 can be omitted.

[0048] The seventh embodiment of the present invention will be described below. In the following description, components similar to those in the first embodiment are given the same reference numerals and their description will be omitted. Below, the characteristic parts of this embodiment will be described in detail with reference to FIG. The seventh embodiment of the present invention is characterized in the direction of the pair of through slits 18 and the female screw portion 20 between the pair of through slits 18. The length adjustment jig 10 is interposed between the inner tube 12 and the outer tube 14 that are fitted to each other, and has a pressing portion 22 that passes through the pair of through slits 18 and contacts the outer circumferential surface 15 of the inner tube 12, and a fastening screw portion 24 that can press and fix the pressing portion 22 against the outer circumferential surface 15 of the inner tube 12, and the fastening screw portion 24 has a male screw portion 26 that can be screwed into the female screw portion 20, which is common to the first embodiment. However, in the first embodiment, the orientation of the pair of through slits 18 and the female thread portion 20 between the pair of through slits 18 provided on the outer peripheral surface 16 of the outer tube 14 was along the extension direction of the inner tube 12 and the outer tube 14, whereas in this embodiment, the orientation of the pair of through slits 18 and the female thread portion 20 between the pair of through slits 18 is oblique to the extension direction of the inner tube 12 and the outer tube 14, and accordingly, the orientation of the pressing body 34 provided via the pair of through slits 18 is oblique. According to this embodiment, in addition to fixing and supporting the inner tube 12 and the outer tube 14 in the extension direction of the inner tube 12 and the outer tube 14, it is also effective in fixing and holding the inner tube 12 and the outer tube 14 against rotation between them about the extension direction of the inner tube 12 and the outer tube 14. The oblique angle of the pair of through slits 18 and the female thread portion 20 between the pair of through slits 18 with respect to the extension direction of the inner tube 12 and the outer tube 14 should be determined from this viewpoint.

[0049] The eighth embodiment of the present invention will be described below. In the following description, components similar to those in the first embodiment are given the same reference numerals and the description thereof will be omitted. Below, the characteristic parts of this embodiment will be described in detail with reference to FIG. The eighth embodiment of the present invention is characterized in that a pressing body 34 is provided on the outer tube 14, and is a length adjustment jig 10 interposed between the inner tube 12 and outer tube 14 which are fitted together, and has a pressing portion 22 which passes through a through slit 18 and comes into contact with the outer peripheral surface 15 of the inner tube 12, and a tightening screw portion 24 which can press and fix the pressing portion 22 against the outer peripheral surface 15 of the inner tube 12, and the tightening screw portion 24 has a male screw portion 26 which can be screwed into the female screw portion 20, which is common to the first embodiment. However, in the first embodiment, a pair of through slits 18 were provided in the outer peripheral surface 16 of the outer tube 14, and accordingly the pressing body 34 had a clearance hole portion 32 in the center and a pair of pressing surfaces 54, but in this embodiment, a single through slit 18 is provided, and accordingly a single pressing body 34 is provided.

[0050] More specifically, a solid pressing body 34 that can be fitted into the single through slit 18 is provided, and the position of the outer circumferential surface 16 of the outer tube 14 of the single through slit 18 is within the range of the diameter from the female thread portion 20 to the head portion 58 of the fastening screw portion 24, so that when the head portion 58 of the fastening screw portion 24 is rotated by hand to screw the male thread portion 26 into the female thread portion 20 toward the outer circumferential surface 15 of the inner tube 12, the lower surface of the head portion 58 comes into contact with the upper surface 40 of the pressing body 34, as in the first embodiment, and the pressing body 34 can be pressed toward the outer circumferential surface 15 of the inner tube 12. Also as in the first embodiment, the pressing surface 54 of the pressing body 34 is shaped to fit along the outer circumferential surface 15 of the inner tube 12 so as to be in surface contact with the outer circumferential surface 15 of the inner tube 12. Compared to the first embodiment, this embodiment is more suitable for use in adjusting the overall length of the inner and outer tubes 12, 14, such as a clothesline pole, than for applying the length adjustment jig 10 to the inner and outer tubes 12, 14 in the vertical direction to support a heavy object at a predetermined height.

[0051] The ninth embodiment of the present invention will be described below. In the following description, components similar to those in the first embodiment are given the same reference numerals and their description will be omitted. Below, the characteristic parts of this embodiment will be described in detail with reference to FIG. The ninth embodiment of the present invention is characterized in that the length adjusting jig 10 is used as a so-called earthquake brace. More specifically, in order to prevent furniture, such as a shelf, from falling over during an earthquake, the length adjustment jig 10 has a ceiling-side fixing portion 90 provided on the upper end surface 98 of the inner tube 12, and a shelf-side fixing portion 84 provided on the lower end surface 96 of the outer tube 14 of the length adjustment jig 10, and the length adjustment jig 10 is interposed between the ceiling-side fixing portion 90 and the shelf-side fixing portion 84. The ceiling-side fixing portion 90 has an abutment surface 92 that can abut against the ceiling surface, and has a receiving portion 94 that can receive an upper end surface 98. The shelf-side fixing part 84 has abutment surfaces 89 that are perpendicular to each other and abutment surfaces 86 that can abut against the top surface of the shelf so that it can be attached to the clearance between the wall and the shelf at the corner of the walls that intersect perpendicularly, and has a receiving part 88 that can receive a lower end surface 96. With this configuration, it is possible to adjust the fitting position of the inner pipe 12 and the outer pipe 14 so that the abutment surface 92 of the ceiling-side fixing part 90 abuts against the ceiling surface and the abutment surface 86 of the shelf-side fixing part 84 abuts against the top surface of the shelf, and then use the fastening screw part 24 to firmly fix and support the inner peripheral surface of the outer pipe 14 to the outer peripheral surface of the inner pipe 12 via the pressing part 22. For example, it is possible to provide a plurality of such length adjustment jigs 10 between the ceiling and the shelf to firmly fix the shelf to the ceiling.

[0052] The tenth embodiment of the present invention will be described below. In the following description, components similar to those in the first embodiment are given the same reference numerals and their description will be omitted. Below, the characteristic parts of this embodiment will be described in detail with reference to Figs. 24 to 26. The tenth embodiment of the present invention is characterized in that it is applied as an inclination angle adjustment jig to support a solar panel and adjust the inclination angle, taking a solar panel as an example.

[0053] More specifically, the inclination angle adjustment jig has a tubular portion 102 having an outer surface 16 with a female thread portion 20 and at least one through hole 18 within a predetermined range from the female thread portion 20, a first support bar 104 extending at a predetermined angle to the extension direction of the tubular portion 102 and having a lower end 103 grounded, and a pivot 108 connecting an upper end 106 of the first support bar 104 to the tubular portion 102, and the upper end 106 of the first support bar 104 is connected to the tubular portion 102 so as to be rotatable around the pivot 108. Furthermore, it has a second support bar 112 that is slidably fitted into the tubular portion 102, extends along the extension direction of the tubular portion 102, and has a lower end 103 that is grounded, at least one pressing portion 22 that passes through the through hole 18 from the outer circumferential surface 16 of the tubular base portion and comes into contact with the outer circumferential surface 16 of the second support bar 112, and a fastening screw portion 24 that can press and fix the pressing portion 22 against the outer circumferential surface 16 of the second support bar 112, the tip surface of the pressing portion 22 is shaped to follow the outer circumferential surface 16 of the second support bar 112 so as to be in surface contact with the outer circumferential surface 16 of the second support bar 112, the fastening screw portion 24 has a male thread portion that can be screwed into the female thread portion 20, and the pressing portion 22 has a clearance hole 32 through which the male thread portion 26 can pass. The distance between the lower ends 103 of the first support bar 104 and the two support bars in the plane P formed by both support bars By moving in such a way that the angle of inclination changes, the upper end 106 of the first support bar 104 rotates around the pivot 108 relative to the tubular portion 102 while adjusting the fitting position of the tubular base portion relative to the second support bar 112. Then, the tightening screw portion 24 screws the male threaded portion 26 into the female threaded portion 20 via the clearance hole 32, while the pressing portion 22 passes through the through hole 18, and the tip surface is pressed and fixed in a surface contact manner against the outer peripheral surface 16 of the second support bar 112, making it possible to adjust the inclination angle of the second support bar 112 relative to the contact surface. Each of the tubular portions 102 further has a pair of opposing overhanging flanges 116 that extend from its outer surface in a direction intersecting the extension direction of the tubular portion 102, and each of the pair of overhanging flanges 116 has a first through hole 120 capable of receiving a corresponding end 118 of the pivot 108, and the upper end 106 of the first support bar 104 is provided with a second through hole 122 through which the pivot 108 can pass in a direction intersecting the extension direction of the first support bar 104, and the upper end 106 of the first support bar 104 is positioned between the pair of overhanging flanges 116 so that the first through hole 120 and the second through hole 122 are aligned, and the pivot 108 is provided passing through each of the first through holes 120 and the second through hole 122. A pair of such tilt angle adjustment jigs are installed so that the planes P formed by both support bars are parallel. The opposing edges of the rectangular plate-shaped weight W are supported by the second support bars of the tilt angle adjustment tool. The tilt angle adjustment tool is supported at four points by the lower ends 103 of the first support bars 104 and the second support bars 112, and the fitting positions of the tubular base parts of the tilt angle adjustment tools relative to the corresponding second support bars 112 are adjusted to adjust the tilt angles of the corresponding second support bars 112 of the tilt angle adjustment tools, thereby adjusting the tilt angle θ of the rectangular surface of the rectangular plate-shaped weight load W, thereby forming a device for supporting and adjusting the tilt angle of the rectangular plate-shaped weight load W. The pair of tilt angle adjustment tools are connected by an X-shaped cross member 124.

[0054] According to the inclination angle adjustment jig having the above configuration, the second support bar 112 is fitted inside the tubular portion 102 so as to be movable in the longitudinal direction of the tube, and the first support bar 104 is connected to the tubular portion 102 via a pivot 108 and is rotatable about the pivot 108. The outer circumferential surface of the tubular portion 102 is provided with a female screw portion and at least one through hole within a predetermined range from the female screw portion 72, and has at least one pressing portion 22 that passes through the through hole from the outer circumferential surface of the tubular base portion 102 and contacts the outer circumferential surface of the second support bar 112, and a fastening screw portion 24 that can press and fix the pressing portion 22 against the outer circumferential surface of the second support bar 112, and the tip surface of the pressing portion 22 is shaped to follow the outer circumferential surface of the second support bar 112 so as to be in surface contact with the outer circumferential surface of the second support bar 112. The fastening screw portion 24 has a male screw portion 26 that can be screwed into the female screw portion 72, and the pressing portion 22 has a clearance hole portion 32 through which the male screw portion 26 can pass. Therefore, by moving the first support bar 104 so that the distance between the lower ends of both support bars changes within the plane formed by both support bars, the upper end of the first support bar 104 rotates around the pivot 108 relative to the tubular portion 102, adjusting the fitting position of the tubular base portion 102 relative to the second support bar 112, and then the fastening screw 72 is inserted into the second support bar 112. By using screw portion 24 to screw male thread portion 26 into female thread portion 72 via clearance hole portion 32, while pressing portion 22 is inserted through the through hole and the tip surface is pressed and fixed in a surface contact manner against the outer circumferential surface of second support bar 112, the inclination angle θ of second support bar 112 with respect to the contact surface can be adjusted with simple operation without requiring excessive tightening force, for example, the inclination angle θ of the rectangular surface when a rectangular heavy object is supported by second support bar 112. When installing support stands on each side of the solar panel, each support stand must have a pivot of 108mm. By using a single pivot 108 that penetrates the horizontal direction of the solar panel as the shared pivot 108, when adjusting the tilt angle θ of the solar panel from large to small depending on the season from winter to summer or the movement of the sun from sunrise to sunset throughout the day, the torque-applying grip provided on only one side is used to manually loosen and retighten the fastening, and the single pivot 108 automatically rotates during this time due to the weight of the solar panel, so that the tilt angle θ of the solar panel can be continuously adjusted depending on the time width of the fastening and loosening.

[0055] The eleventh embodiment of the present invention will be described below. In the following description, components similar to those in the first embodiment are given the same reference numerals and the description thereof will be omitted. Below, the characteristic parts of this embodiment will be described in detail with reference to Figs. 27 and 28. The feature of the eleventh embodiment of the present invention is that, whereas in the above-mentioned embodiments, the inner and outer tubes 14 were used only to adjust the length of the inner and outer tubes 14 by adjusting the fitting positions of the inner and outer tubes 14, or the inner and outer tubes 14 were used only as a stand while supporting a weight object with either the inner or outer tube 14 and adjusting only the inclination angle θ of the rectangular surface of the rectangular weight object with either the inner or outer tube 14 supported, the present embodiment is adapted to be applied to traffic signs, so that the inclination angle θ, lateral position, and height of the traffic sign can all be adjusted.

[0056] More specifically, the vehicle has inner and outer pipes 12, 14 that stand vertically from the ground, a tubular portion 102 that is provided at the upper end of the outer pipe 14 so as to cross the outer pipe 14, a diagonal pipe 126 that is fitted inside the tubular portion 102, and a traffic sign T that is provided at the upper end of the diagonal pipe 126. The height of the inner and outer pipes 12, 14 can be adjusted, and the tubular portion 102 By adjusting the position of the inclined tube 126 relative to the upper end of the inclined tube 126, the lateral position can be adjusted, and the inclination angle θ of the traffic sign T relative to the upper end of the inclined tube 126 can be adjusted. Specifically, it is used as a fixed support jig for a stand that supports and fixes heavy objects using either the inner or outer tube 12, 14; as an overall length adjustment jig for the inner and outer tubes 12, 14; and as a tilt angle adjustment jig that rotatably connects the inner tube 12 and the outer tube 14 via a pivot 108 and adjusts the fitting position of the inner tube 12 and the outer tube 14. The configuration of each adjustment jig is the same as that of the above embodiment, so a detailed description will be omitted. The orientation and / or position of the device can be easily adjusted while providing stable support. be.

[0057] The twelfth embodiment of the present invention will be described below. In the following description, components similar to those in the first embodiment are given the same reference numerals and their description will be omitted. Below, the characteristic parts of this embodiment will be described in detail with reference to Figs. 19, 36 to 37. The feature of the twelfth embodiment of the present invention is that, whereas in the above-mentioned embodiments, the inner and outer tubes 14 could be used only to adjust the length of the inner and outer tubes 14 by adjusting the fitting positions of the inner and outer tubes 14, or the inner and outer tubes 14 could be used only as a stand while supporting a weight object with either the inner or outer tube 14 and adjusting only the inclination angle θ of the rectangular surface of the rectangular weight object with either the inner or outer tube 14 supported, the present embodiment is adapted to be applied to traffic signs, so that the inclination angle θ, lateral position, and height of the traffic sign can all be adjusted. As shown in Figures 19, 36 to 37, a pair of inner and outer tubes 12, 14, which fit together using a length adjustment jig, are provided so as to extend parallel to each other at a specified distance and diagonally upwards, and the lower parts of the outer tubes 14 of the pair of inner and outer tubes 12, 14 are connected by members Y3 and Y5, and a steel pan (musical instrument) to be supported at a specified height is placed between the upper parts of the inner tubes 12 of the pair of inner and outer tubes 12, 14, and members Y1 and Y2 are connected to the lower parts of each of the outer tubes 14 of the pair of inner and outer tubes 12, 14 so as to jam and support each of the pair of inner and outer tubes 12, 14 extending diagonally upwards, suspended diagonally from the upper ends of each inner tube 12, and thus the steel pan (musical instrument) is supported at four points. In this case, the length adjustment jig is used to adjust the fitting lengths of the inner and outer tubes 12, 14 so that they are the same, thereby allowing the steelpan (musical instrument) to be supported and fixed horizontally at the desired height. Furthermore, the fixing support jig of the present invention is also applied to the connection between the X-shaped cross members Y3, Y4 and the outer tube 14, and the fixing support jig of the present invention is used for the fitting portion of the inner and outer tubes 12, 14 to support the steel pan at a specified height, and when folding the stand after use, the fastening screw portion 24 of the fixing support jig is loosened and the fixing support jig is moved upward along the outer tube 14 to straighten the X-shaped cross members Y3, Y4. As a result, when a large stand supporting a large and heavy object such as a steel pan is transported, it is not bulky by folding it, and is convenient for transportation by car, for example, and can be carried with one hand, and can be deployed as a stand at the site of use with one touch. The structure of the fixing support jig is the same as that of the eleventh embodiment, so a detailed description thereof will be omitted. As a modification, when used as a microphone stand, as shown in FIG. The entire outer tube fits onto the outer peripheral surface of a diagonal bar that is fixed at one end and has a height adjustment function, and by using a length adjustment jig 10 for this fitting position, it is possible to easily adjust not only the height of the microphone but also its horizontal position.

[0058] As described above, in the first to ninth embodiments, the length adjustment jig is used, in the tenth to twelfth embodiments, the fixed support adjustment jig is used as a stand for supporting a heavy object, and in the twelfth embodiment, In the embodiment, the inclination angle adjustment jig has been described, but in any case, the jig is common to the integral structure of the inner and outer tubes 12, 14 constituting the jig at the fitting position of the inner and outer tubes 12, 14. The manufacturing method of the integral structure of the inner and outer tubes 12, 14 is as follows: A step of machining, 3D printer modeling, or lost wax processing a pair of through slits 18 and a female screw portion 72 on an outer surface of a solid or hollow inner tube 12 and a hollow outer tube 14 that fit together, the outer surface corresponding to the fitting portion of the outer tube 14; This is a step of preparing a pressing portion 22 having a U-shaped cross section, which penetrates a pair of through slits 18 from the outside of the outer surface and can be pressed against the outer circumferential surface 15 of the inner tube 12 in a tight contact manner by surface contact at two points, the pressing portion 22 having a clearance hole 32, and a tightening screw portion 24 having a female screw portion 72 and a torque applying grip 132 that can be screwed into the female screw portion 72, in which the diameter of the torque applying grip 132 is selected according to the support load so that it can be firmly supported by hand force alone, and at a predetermined fitting position, the male screw portion 26 is screwed into the female screw portion 72 through the clearance hole 32 by tightening the tightening screw portion 24 by hand force via the torque applying grip 132. and pressing and fixing the pressing portion 22 toward the outer peripheral surface 15 of the inner tube 12 in a surface contact manner, while pressing and fixing the outer peripheral surface 15 of the inner tube 12 on the opposite side of the surface contact portion of the pressing portion 22 with the inner tube 12 against the inner peripheral surface of the outer tube 14, thereby forming an overall length adjustment jig for the inner and outer tubes 12, 14, or an inclination angle adjustment jig by adjusting the fitting position of the inner tube 12 and outer tube 14 by rotatably connecting the inner tube 12 and outer tube 14 via the pivot 108, or a fixed support jig for a stand that supports and fixes a heavy object with either the inner or outer tube 12, 14, and then fixing the inner tube 12 and outer tube 14 together in the longitudinal direction of the tubes to complete the process. When the pressing portion 22 is thin relative to the width of the load receiving surface, it may be called a pressing plate, and when the pressing portion 22 is thick relative to the width of the load receiving surface, it may be called a pressing block.

[0059] More specifically, the inner tube 12 and the outer tube 14 may be made of either metal or resin, and may be manufactured based on either a solid material or a molten material. Depending on the material, the manufacturing methods are broadly classified as follows: If the material is metal, solid materials can be machined, such as pressed, cut, or drilled, while molten materials can be cast or modeled using a 3D printer. If the material is resin, solid materials can be machined, while molten materials can be molded, such as injection molding or blow molding, or modeled using a 3D printer. In particular, when casting metal, the lost wax method or full mold method is preferred, and when modeling metal using a 3D printer, metal powder is used. It is preferable that the inner tube 12 and the outer tube 14 are made of resin from the viewpoint of light weight, but it is preferable that the male threaded portion 26 of the fastening screw and the female threaded portion 72 into which the male threaded portion 26 screws are both made of metal from the viewpoint of durability. If the opening of the resin outer tube 14 is the male threaded portion 26, a metal nut having the male threaded portion 26 may be fitted into the opening of the resin outer tube 14, or if the thickness of the resin outer tube 14 is thin, a thickness may be increased locally to ensure the thickness of the female threaded portion 72.

[0060] 3D printed objects are created using a 3D printer by a known method called fused deposition modeling. Specifically, the manufacturing method includes a step of melting a resin composition or filament, and a step of extruding the resulting melt from a nozzle of a 3D printed object manufacturing device to create a 3D printed object. In the melting step, the propylene resin composition for 3D printers or the 3D print material which is the filament for 3D printers is melted. The heating means for melting the 3D print material is not particularly limited, and known heating means can be applied. In the melting step, it is preferable to use a 3D print object manufacturing device equipped with a heating means such as an electric heater. The temperature at which the 3D printing material is melted is not particularly limited and may be appropriately set according to the properties of the thermoplastic resin. The temperature at which the 3D printing material is melted may be, for example, a temperature of +10 to 150°C based on the higher of the melting point or glass transition temperature (Tg) of the thermoplastic resin. In the melting step, for example, the material for 3D printing may be melted and kneaded. By melting and kneading the material for 3D printing, the material for 3D printing tends to be mixed more uniformly. Therefore, the occurrence of unevenness in the material of the obtained 3D printed object is easily suppressed. As a result, the deformation of the 3D printed object tends to be further suppressed.

[0061] In the modeling process, the 3D printing material melted in the melting process is extruded from a nozzle to create a 3D printed object. In the modeling process, for example, the molten 3D printing material is extruded from the nozzle of a 3D printing object manufacturing device, and a 3D printed object is created by sequentially stacking 2D layers on a substrate based on multiple 2D data. The multiple 2D data are generated by slicing the 3D coordinate data of the 3D printed object to be created using slicer software. The 3D print object manufacturing device may be a material extrusion type 3D print object manufacturing device. The material extrusion type 3D print object manufacturing device is not particularly limited, and a known device or known device configuration may be applied. The 3D print object manufacturing device may be, for example, a device including a cylinder, a nozzle, and a heating means. The 3D print object manufacturing device is supplied with a material for 3D print modeling. The nozzle is provided at a downstream side of the cylinder in the discharge direction of the material for 3D print modeling. The nozzle discharges the material for 3D print modeling. The heating means is provided at the cylinder. The heating means heats and melts the material for 3D print modeling. The 3D print object manufacturing device extrudes the heated and melted 3D print material from a nozzle, and layer-by-layer models the 3D print material extruded from the nozzle. This creates a 3D print object. The 3D print material may also be solidified by applying ultraviolet light to it using a conventionally known photolithography method.

[0062] The cylinder may have a screw therein, the screw mixing the 3D printing material. The 3D printing object manufacturing apparatus may further include a table device that is disposed opposite the nozzle. The molten 3D printing material extruded from the nozzle is stacked on the table device. The 3D printed object manufacturing apparatus may further include a control means for controlling the spatial coordinates of the substrate and the nozzle, and the amount of the 3D printing material extruded from the nozzle. The control means preferably controls the discharge of the molten 3D printing material extruded from the nozzle, and controls the movement of the nozzle and / or the table device in the X-axis, Y-axis, and Z-axis directions relative to a reference plane. Alternatively, a photolithography method may be used in which molten 3D printing material is solidified using ultraviolet light.

[0063] Meanwhile, the lost-wax process can be broadly classified into two types based on the manufacturing method: a method in which the pattern used to create the mold is removed from the mold by dissolving or burning it off, and the space between the pattern and the mold is filled with molten metal to cast the product (burnt pattern methods such as the lost-wax process and full mold process), and a method in which the pattern itself is not burned off, but is demolded (physically removed) from the mold to create the mold shape, or the mold itself is created by machining, etc., and the product is then cast (non-burnt pattern methods such as the Shaw process and die casting process).

[0064] The lost wax process uses wax as the pattern material, and after a model formed using a metal mold is layered and hardened with a slurry mold material, the wax is removed (heated and dissolved, burned off), and the space where the original model was is filled with molten metal to create a casting.The full mold process uses polystyrene foam or other resin material as the pattern material, and a model made by molding with a metal mold or directly machining is embedded in the mold material, and molten metal is poured in as it is, and the model disappears as the molten metal is filled in to create a casting.

[0065] The pressing surface has an outer shape of an elongated rectangle, and the area of ​​the elongated rectangle is preferably determined from the viewpoint of increase or decrease in pressing pressure due to the fastening force of the screw, for example, when the inner and outer pipes 12, 14, especially the inner pipe 12, are made of resin, it is preferable to ensure the area of ​​the elongated rectangle from the viewpoint of protecting the outer circumferential surface 15 of the inner pipe 12. The surface shape is preferably a shape that follows the outer circumferential surface 15 of the inner pipe 12 so as to be able to abut closely against the outer circumferential surface 15 of the inner pipe 12, for example, an arc-shaped curved surface when the inner pipe 12 has a circular cross section, a flat surface when abutting against one surface of the rectangular cross section when the inner pipe 12 has a rectangular cross section, and a flat surface bent inwardly in a broken line so as to straddle two adjacent intersecting surfaces when abutting against a corner of the rectangular cross section.

[0066] According to the manufacturing method of the integral structure of the inner and outer tubes having the above-mentioned configuration, when preparing the inner and outer tubes which fit together, the pressing portion 22 having the clearance hole 32, and the fastening screw portion having the female screw portion and the torque application grip 132 which can be screwed into the female screw portion, the diameter of the torque application grip 132 is selected according to the support load determined according to the application of the integral structure of the inner and outer tubes as a length adjustment jig, an inclination angle adjustment jig, or a fixed support jig for a stand, and at a predetermined fitting position of the inner and outer tubes, the fastening screw portion is fastened by hand force via the torque application grip 132 to screw the male screw portion into the female screw portion through the clearance hole 32, thereby rotating the pressing portion 22 toward the outer circumferential surface 15 of the inner tube 12. By pressing and fixing the outer circumferential surface 15 of the tube 12 in a surface contact manner, and pressing and fixing the outer circumferential surface 15 of the inner tube 12 on the opposite side of the surface contact portion of the pressing portion 22 with the inner tube 12 against the inner circumferential surface of the outer tube, it is possible to form an overall length adjustment jig for the inner and outer tubes, or an inclination angle adjustment jig by adjusting the fitting position of the inner tube 12 and outer tube by rotatably connecting the inner tube 12 and outer tube via a pivot, or a fixed support jig for a stand that supports and fixes heavy objects with either the inner or outer tube, and by completing the fixing of the inner tube 12 and outer tube together in the longitudinal direction of the tubes, it is possible to provide a manufacturing method for an integrated structure of inner and outer tubes that can firmly support the inner and outer tubes together using only manual force, depending on various applications.

[0067] The thirteenth embodiment of the present invention will be described below. In the following description, the first embodiment The same components as those in the previous embodiment are denoted by the same reference numerals and the description thereof will be omitted. Below, the characteristic parts of this embodiment will be described in detail with reference to FIGS. 38 to 40. The feature of the thirteenth embodiment of the present invention is that, whereas in the above-described embodiments, the fastening screw 24 may be loosened too much, causing the pressing portion 22 to completely come out of the corresponding through slit 18, this embodiment is designed to prevent such a situation from occurring.

[0068] More specifically, when loosening the fixed support provided by the fastening screw 24 at the mating portion of the inner and outer tubes 12, 14, it is necessary to reverse the fastening screw 24 to release the contact of the pressing surface 54 of the pressing body 34 with the outer surface of the inner tube 12. However, if the fastening screw 24 is loosened too much, the pressing portion 22 may come completely out of the corresponding through slit 18, causing the pressing portion to fall off the inner and outer tubes 12, 14, and in some cases, the pressing portion 22, which is a small part, may even go missing. In this case, by providing a difference between the inclination angle of the pressing body 34 constituting the leg of the pressing portion 22 with a U-shaped side cross section and the inclination angle of the through slit 18 into which the pressing body 34 is inserted, the pressing body 34 is pressed into the through slit 18 while being deformed. Even if the fastening screw 24 is loosened too much and the pressing portion 22 completely comes out of the corresponding through slit 18, the pressing portion 22 is engaged and held in the pair of through slits 18, thereby effectively preventing it from falling off.

[0069] In the following, a description will be given of a case in which the tubular base portion 30 is fitted and fixed to the end portion of the outer tube 14 by, for example, screwing. 38 to 40, the cross section of the pressing body 34 along the pressing surface 54 from the upper surface 44 is V-shaped, while the cross section of the pair of through slits 18 in the thickness direction of the inner and outer tubes 12, 14 is V-shaped, and each of the through slits 18 has an inclined inner side surface 150 and an inclined outer side surface 152 facing each other as a through hole into which the pressing body 34 can be inserted in the thickness direction of the outer tube 14, and the first angle θ2 of the inclined outer side surface 35 of each of the pair of pressing bodies 34 with respect to the upper surface 44 is larger than the second angle θ1 of the inclined surface of the corresponding through slit 18 with respect to the outer peripheral surface 15 of the inner tube 12. The inclined inner side surface 150 and the inclined outer side surface 152 constituting the through slit 18 are set parallel to each other. For example, the difference between the first angle θ2 and the second angle θ1 is one twentieth or one tenth of 1°.

[0070] 38, with the inner tube 12 fitted inside the outer tube 14, each pressing surface 54 of the pressing body 34 is positioned at the opening 154 of the corresponding through slit 18. In this case, the width T2 of the opening 154 is set to be larger than the thickness T1 of the inclined portion 56, and the distance L2 between the upper edges of the inclined outer side surfaces 152 in the opening 154 is set to be smaller than the distance L1 between the outer edges of the pressing surfaces 54 of the inclined portion 56 by a predetermined value.

[0071] Next, as shown in Figure 39, by tightening the tightening screw portion 24, the pressing body 34 is moved toward the outer peripheral surface 15 of the inner tube 12 via the upper surface 44, which is the load-receiving surface of the pressing body 34, and the pressing body 34 is moved within the through slits 18 toward the inner tube 12 until the pressing surfaces 54 of each inclined portion 56 contact the inclined inner surfaces 150 of the corresponding through slits 18.

[0072] In this case, since the first angle θ2 is greater than the second angle θ1, by further tightening the tightening screw portion 24, each inclined portion 56 is forcibly deformed so that the first angle θ2 becomes smaller, and the inclined inner surface 150 of the corresponding through slit 18 is used as a guide surface to press in and move the pressing body 34 within the through slit 18 toward the inner tube 12.

[0073] Next, as shown in Figure 40, the pressing surfaces 54 of each inclined portion 56 abut against the outer peripheral surface 15 of the inner tube 12, and by further tightening the fastening screw portion 24, the outer tube 14 is fixed and held relative to the inner tube 12 in the longitudinal direction of the tube by the pressing body 34. More specifically, by screwing the male threaded portion 26 of the tightening screw portion 24 into the female threaded portion 24 of the outer tube 14, the pressing end face 54 is pressed against the outer peripheral surface 15 of the inner tube 12 through the through slit 18 of the outer tube 14, and the inner tube 12 is moved until the diametrically opposite portion of the outer peripheral surface 15 of the inner tube 12 contacts the inner peripheral surface of the outer tube 14. In this way, the inner tube 12 is firmly fixed and supported to the outer tube 14 by support at three points: the two pressing end faces 54 and one line contact extending in the longitudinal direction of the tube. The length l from the upper surface 44 of the pressing portion 34 to the pressing surface 54 is The inner pipe 12 is set so that it can come into contact with the outer circumferential surface 15 of the inner pipe 12. The predetermined value, which is the difference between the intervals L2 and L1, can be determined from the perspective of being able to press-fit while deforming each inclined portion 56 so that the first angle θ2 becomes small within the range in which the tightening screw portion 24 is tightened by hand, and while using the inclined inner surface 150 of the corresponding through slit 18 as a guide surface.To this end, the bending rigidity of the pressing body 34 can be set according to the material of the pressing body 34, the thickness T1 of the inclined portion 56, and the length l from the upper surface 44 of the pressing portion 34 to the pressing surface 54. For example, when the length l from the upper surface 44 of the pressing portion 34 to the pressing surface 54 is set to be long, It is preferable to secure the thickness T1 of the inclined portion 56. When the Young's modulus is large due to the material of the pressing body 34, the length l from the upper surface 44 of the pressing portion 34 to the pressing surface 54 is made long, or the inclined portion 5 The thickness T1 of 6 may be set small. Regarding the V-shaped configuration of the pressing body 34 and the through slit 18, as long as the pressing body 34 can be pressed into the through slit 18, it does not have to be a diagonal straight line configuration but may be a curved configuration, and in this case, the inclined outer surface 152 opposite the press-in surface may be a free-form surface shape as long as clearance can be secured during movement of the pressing body 34 within the through slit 18.

[0074] With the above configuration, by loosening the fastening screw portion 24, the pressing force of the pressing surface 54 of each inclined portion 56 at the abutment portion against the outer peripheral surface 15 of the inner tube 12 weakens, the outer tube 14 is released from the fixed state relative to the inner tube 12 in the longitudinal direction of the tube, and the outer tube 14 can move in the longitudinal direction of the tube relative to the inner tube 12. However, the pressing body 34, each inclined portion 56, is pressed and held against the corresponding inclined inner surface 150 by the force of restoring to its original shape. Therefore, even if the fastening screw portion 24 falls off or an attempt is made to remove the pressing body 34 upward from the through slit 18, it will come into contact with the inclined outer surface 152, and the pressing portion 22 will be held within the through slit 18, making it possible to prevent the pressing portion 34, which is a small item, from becoming separated from the inner and outer tubes 12, 14. In addition, when the pressing portion 22 is deformed into a figure eight by press-fitting, the pressing surface 54 must be processed taking into consideration the direction of the pressing surface 54 before deformation so that the pressing surface 54 abuts against the outer peripheral surface 15 of the inner tube 12.

[0075] As a modified example, by setting the first angle θ2 to be larger than the first angle θ2, when the pressing body 34 is inserted into the through slit 18, it comes into contact with the inclined outer surface 152, and is pressed in so that the first angle θ2 becomes smaller, using the inclined outer surface 152 as a guide surface. As another modified example, an opening may be provided on the outer peripheral surface 16 of the outer tube 14 on the diametrically opposite side to the female threaded portion 20, and the male threaded portion 26 of the fastening screw 24 may be screwed into the female threaded portion 20 through the clearance hole 32 of the pressing plate. When the tip of the male threaded portion 26 protrudes from the inner peripheral surface of the outer tube 14, a processing tool may be inserted into the inside of the outer tube 14 from the opening to crimp the tip of the male threaded portion 26 to the extent that it does not impede the relative movement in the longitudinal direction of the fitting portion of the inner and outer tubes 12, 14, thereby forming a protrusion around the opening of the through slit 18 on the inner peripheral surface side of the outer tube 14, thereby preventing the fastening screw 24 from being loosened too much and the pressing portion 22 of the pressing portion from completely coming out of the corresponding through slit 18.

[0076] The fourteenth embodiment of the present invention will be described below. In the following description, the first embodiment The same components as those in the previous embodiment are denoted by the same reference numerals and the description thereof will be omitted. Below, the characteristic parts of this embodiment will be described in detail with reference to FIG. The feature of the 14th embodiment of the present invention is that in the 13th embodiment, by pressing the pressing portion 22 into the corresponding through slit 18, even if the fastening screw 24 is loosened too much and the pressing portion 22 of the pressing portion comes completely out of the corresponding through slit 18, the pressing portion 22 is engaged and held in a pair of through slits 18, thereby making it possible to effectively prevent the pressing portion 22 from falling off, whereas in this embodiment, although the pressing portion 22 is prevented from falling off in common with the 13th embodiment, an insertion rod is inserted into the pressing body 34 of the pressing portion 22. Below, a description will be given of a case where the tubular base portion 30 is fitted and fixed to the end of the outer tube 14, for example, by screw fixing. More specifically, as shown in FIG. 41 , of the pair of pressing bodies 34, in the pressing body 34 closer to the end of the outer tube 14 on the side of the fitting portion between the outer tube 14 and the inner tube 12, an insertion hole 204 is provided in the thickness direction of the pressing body 34 from the side closer to the end of the outer tube 14 of the pair of opposing side surfaces constituting the pressing body 34, and a slender hole 202 with a circular cross section is provided in the end face 201 on the fitting portion side of the outer tube 14, having a circular opening in the end face 201 and extending through to the side surface closer to the end of the outer tube 14, and further has an insertion rod 200 that can be inserted into the slender hole 202 from the circular opening. By inserting the pressing plate into the pair of through slits 18, the slender hole 202 communicates with the insertion hole 204, and by inserting the tip portion 208 of the insertion rod 200 into the insertion hole 204, the pressing plate is held in the pair of through slits 18. The elongated hole 202 has a female threaded portion 206, and the insertion rod 200 is a set screw 200 of a fixed diameter that can be screwed into the female threaded portion 206 of the elongated hole 202. While the set screw 200 is screwed into the elongated hole 202, the tip portion 208 is inserted into the insertion hole 204, whereby the pressing plate is removably held within the pair of through slits 18. The insertion hole 204 has an elliptical cross section elongated vertically in the direction of movement of the presser body 34 so that the presser body 34 can move within a predetermined range when the set screw 200 is inserted into the insertion hole 204, and does not need to penetrate the presser body 34 in the thickness direction. The female thread portion 206 is provided over the entire length of the elongated hole 202, and the set screw 200 is inserted through the circular opening of the elongated hole 202 and screwed into the female thread portion 206 until the tip protrudes into the insertion hole 204. As a modified example, the female thread portion 206 does not have to be provided over the entire length of the elongated hole 202, but may be provided with a clearance hole partway from the circular opening of the elongated hole 202 into which the set screw 200 can be inserted, and may be provided from near the side surface close to the end of the outer tube 14 to the side surface, thereby making it possible to easily attach the set screw 200. Also, instead of the set screw 200 having a male thread, an insertion rod 200 that can simply be inserted into the slot 202 may be used. In this case, the diameter of the insertion rod 200 needs to be such that it can be tightly fitted into the slot 202. According to the above-mentioned configuration, in the thirteenth embodiment, the pressing portion 22 has a V-shaped side cross-section that widens from the upper surface 44 that constitutes the load-receiving surface toward the pressing surface 54. However, in the case of a metal pressing portion 22, machining requires a certain amount of effort. In this embodiment, however, the pressing portion 22 has a U-shaped side cross-section, and while the machining is simple, it is possible to effectively prevent the pressing portion 22 from falling off.

[0077] The fifteenth embodiment of the present invention will be described below. In the following description, the first embodiment The same components as those in the previous embodiment are denoted by the same reference numerals and the description thereof will be omitted. Below, the characteristic parts of this embodiment will be described in detail with reference to FIGS. 42 to 46. The feature of the fifteenth embodiment of the present invention is that while in the above-described embodiments the pressing body 34 against the outer peripheral surface 15 of the inner tube 12 was performed by rotating the fastening screw portion 24 in a screw-in type manner, in this embodiment a pressing lever mechanism 300 is adopted as an alternative to the fastening screw portion 24 to press the pressing body 34 against the outer peripheral surface 15 of the inner tube 12.

[0078] In the following, a description will be given of a case in which the tubular base portion 30 is fitted and fixed to the end portion of the outer tube 14 by, for example, screwing. The pressing lever mechanism 300 has a pressing lever 301 that presses the pressing body 34 against the outer peripheral surface 15 of the inner tube 12, a pivot 306 that extends parallel to the outer tube 14 and enables the pressing lever 301 to rotate between a non-pressing circumferential position and a pressing circumferential position, and a pin 304 that holds the pivot 306 at a predetermined height from the outer peripheral surface of the outer tube 14 (tubular base portion). The pressing lever 301 is an integral structure with a substantially tadpole cross section, and has a grip lever portion 302 to be held with the fingers, and a rotating portion 303 which rotates integrally with the grip lever portion 302 around a pivot 306, and the pivot 306 is provided at the center of the rotating portion 303. More specifically, the rotating portion 303 is provided with a notch 310 and separated into rotating portions facing each other, a pin 304 is positioned within the notch 310, and the pivot 306 which penetrates the pin 304 penetrates a through hole with a circular cross section provided at each rotating portion, and each rotating portion, i.e., the pressing lever 301, is capable of rotating around the pivot 306 between a non-pressing circumferential position and a pressing circumferential position. The pressing lever 301 may be made of resin from the viewpoint of light weight. The length L of the arm from the center O of the pivot 306 of the grip lever portion 302 should be determined so that the pressing lever 301 can be sufficiently pressed down by hand force using the principle of leverage. Each rotating portion has a curved peripheral surface 308, and while the pressing lever 301 rotates around the pivot 306 between a non-pressing circumferential position and a pressing circumferential position, one of the portions of the curved peripheral surface 308 is held in contact with the upper surface 44 of the pressing body 34, so that the rotation of the pressing lever 301 moves the pressing body 34 in the thickness direction of the outer tube 14 within the through slit 18.

[0079] More specifically, as shown in Figure 44, in the curved peripheral surface 308, at the non-pressing circumferential position, the distance between the center O of the pivot 306 and the upper surface 44 of the pressing body 34 is R1, at the pressing start circumferential position (Figure 42) the distance between the center O of the pivot 306 and the upper surface of the pressing body 34 is R2, and at the pressing end circumferential position, the distance between the center O of the pivot 306 and the upper surface of the pressing body 34 is R3, with R1>R2>R3 being set, so that the pressing body 34 is pressed against the outer peripheral surface 15 of the inner tube 12 due to the difference between R2 and R3. The difference between R2 and R3 should be set so that the pressing force of the pressing body 34 is sufficient to fix and hold the inner and outer tubes 12, 14 in place. For example, if the thickness of the outer tube 14 is several millimeters, the difference between R2 and R3 should be approximately one-twentieth or one-tenth of that thickness. The curved peripheral surface 308 is set to smoothly change from R1 to R3, and the pressing lever 30 In order to fix and hold the pressing lever 301 at the pressing circumferential position, it is preferable to form an arc portion having a central angle range of, for example, 90 degrees and a constant R3 with respect to the center O of the pivot shaft 306 from the curved circumferential surface portion corresponding to the pressing start circumferential position of the pressing lever 301, and set it so that it gradually becomes smaller from there. The entire curved circumferential surface 308 may be configured from a combination of multiple arc portions that are smoothly connected to each other, or may be an ellipse whose major axis corresponds to R3. It is preferable to determine the curved shape of the grip lever portion 302 so that when the pressing lever 301 is positioned at the circumferential position where pressing begins, the grip lever portion 302 is oriented approximately upright so that it can be easily pressed down by hand force, and when the pressing lever 301 is positioned at the circumferential position where pressing ends, the grip lever portion 302 is oriented close to the outer peripheral surface of the outer tube 14 so as not to protrude from the outer peripheral surface of the outer tube 14 and get in the way, and so that a space 314 is formed between the inner surface 316 of the grip lever portion 302 and the outer peripheral surface of the outer tube 14 into which a finger can be inserted.

[0080] The pin 304 stands upright with its lower end screwed to the outer circumferential surface 16 of the outer tube 14, and has a through hole (not shown) in the middle through which the pivot 306 can pass. By adjusting the amount of screwing at the lower end, the height of the pivot 306 from the outer circumferential surface 16 of the outer tube 14 can be adjusted. According to the above configuration, by adjusting the amount by which the pin 304 is screwed into the outer tube 14, the height of the pivot 306 relative to the outer peripheral surface 16 of the outer tube 14 can be adjusted, and then the pressing lever 301 can be rotated around the pivot 306 from the non-pressing circumferential position to the pressing circumferential position, so that the pressing body 34 is pressed against the outer peripheral surface 15 of the inner tube 12 via the curved peripheral surface 308 of the rotating portion 303. Compared to the first to eleventh embodiments using a screw-type rotation by the fastening screw portion 24, by pressing the pressing lever 301 down from the non-pressing circumferential position to the pressing circumferential position with a single touch, it is possible to fix and hold the inner and outer tubes 12, 14 while maintaining the pressing circumferential position of the pressing lever 301. Conversely, by pressing the pressing lever 301 up from the pressing circumferential position to the non-pressing circumferential position with a single touch, the inner and outer tubes 12, 14 can move relative to each other in the longitudinal direction of the tubes. As a modified example, the pin 304 and the pivot 306 may be integrally formed. In other words, the pivots 306 may be provided separately on the outer circumferential surface of the pin 304, extending in opposite directions from positions diametrically opposite each other, without providing a through hole for the pivot 306 in the pin 304. When there is no need to adjust the height of the pivot 306 from the outer circumferential surface 16 of the outer tube 14, the lower end of the pin 304 may be fixed without being provided with a rotatable threaded portion.

[0081] A modified example of the pin 304 is shown in FIG. 47. In FIG. 47(A), 47(B) shows the case where the male threaded portion 310 and the main body portion 322 are integral. In both cases, the height of the main body 322, i.e., the pivot 306 fitted in the through hole 318, relative to the outer tube 14 or the outer peripheral surface 16 of the tubular base portion 30 fitted to the outer tube 14 can be adjusted by adjusting the amount of screwing of the male thread portion 310 into the female thread portion 326 of the tubular base portion 30 fitted to the outer tube 14, thereby making it possible to adjust the pressing force of the pressing body against the outer peripheral surface 15 of the inner tube 12 by pressing down the pressing lever 300 and the distance between the tip portion 312 and the outer tube 14 or the outer peripheral surface 16 of the tubular base portion 30 fitted to the outer tube 14 when pressing by the pressing lever 300 is completed, but they differ in the following points.

[0082] In FIG. 47(A), in order to adjust the amount of screwing, the pin 304 is rotated, and As a result, the installation orientation of pressing lever 300 fixed to pin 304 via pivot 306 varies, and this is suitable for cases where the amount of screw-in adjustment is small. On the other hand, in Fig. 47(B), male threaded portion 310 is inserted into hollow portion 320 of main body portion 322, protrudes from clearance hole 328 in bottom surface 324 of main body portion 322, and is screwed into female threaded portion 326, so that main body portion 322 is supported rotatably relative to male threaded portion 310. The diameter of male threaded portion 310 is set smaller than the diameter of hollow portion 320 so that male threaded portion 310 can be inserted into hollow portion 320. In this case, by pushing down the pressing lever 300, the main body 322 is pulled upward via the pivot 306, and the bottom surface 324 of the main body 322 comes into contact with the lower surface of the head portion 330 of the male screw portion 310, so that the main body 322 can be firmly fixed to the male screw portion 310 without rotating together with the rotation of the male screw portion 310. Therefore, even if the screw-in adjustment amount is large, when the pressing lever 300 is pushed down, the pressing lever 300 can be firmly fixed to the male screw portion 310 in the vertical direction without changing the installation orientation of the pressing lever 300.

[0083] As described above, this embodiment has a pressing lever mechanism 300 having an annular peripheral surface 308 that rotates around an axis parallel to the load receiving surface while contacting the load receiving surface, and the annular peripheral surface 308 is curved such that the radius from the axis changes from a first radius to a second radius. By rotating the lever, the pair of pressing bodies 34 can move in the thickness direction of the corresponding through slits 18, and by rotating the lever of the pressing lever mechanism 300 around an axis provided at a predetermined height from the outer circumferential surface 16 of the outer tube 14, the intermediate halfway between the first radius and the second radius is At the rotational position corresponding to the diameter, the pressing body 34 starts pressing against the outer peripheral surface 15 of the inner tube 12, and at the rotational position corresponding to the second radius, the pressing body 34 finishes pressing against the outer peripheral surface 15 of the inner tube 12, so that the pressing end face is in surface contact with the outer peripheral surface 15 of the inner tube 12 and the outer peripheral surface 15 of the inner tube 12 on the opposite side of the surface contact part of the pressing end face with the inner tube 12 is pressed and fixed against the inner peripheral surface of the outer tube 14. Therefore, there is no need to increase the diameter of the head portion 58 of the fastening screw portion 24 of the first embodiment, and advanced machining to make the pressing body 34 of the thirteenth embodiment into a V-shaped type is not necessary. Furthermore, even if the set screw 200 of the fourteenth embodiment, which requires the trouble of screwing in, is omitted, the parts do not come apart and it is possible to press with a large torque by manual force with one touch without the parts coming apart.

[0084] The pressing lever mechanism 300 can also be applied when the installation orientations of one and the other of the pair of pressing bodies 34 are different, as in Figure 23 of the first embodiment, and when the above-mentioned screw-in type is adopted for the pin 304, by adopting the pair of pressing bodies 34 of the V-shaped cross section type of the 13th embodiment or the set screw 200 of the 14th embodiment, even if the pin 304 should come off the outer tube 14, it is possible to effectively prevent the pair of pressing bodies 34 from detaching from the outer tube 14 and coming apart.

[0085] In the ninth embodiment, the description was given of applications as an inner and outer tube length adjustment jig, an integral fixed support jig, and an integral fixed holding jig to an earthquake prevention brace, in the tenth embodiment as a solar panel stand, in the eleventh embodiment as a traffic sign, and in the twelfth embodiment as a steel pan or microphone stand, respectively, but other application examples are given below.

[0086] 48 shows an example of application to a music stand 400. The fixing support jig for the inner and outer tubes employs the thirteenth embodiment. In other words, by employing a clamping screw portion 24 that can be tightened by hand and a pressing body 34 with a V-shaped cross section, the mating portions of the inner and outer tubes 12, 14 can be fixed and held in place by tightening the clamping screw portion 24 without being noticeable in appearance. This reliably prevents, for example, the music stand 402 from slipping downward during performance, and even when the clamping screw portion 24 is loosened when adjusting the height of the music stand 402 and the clamping screw portion 24 comes out of the female threaded portion of the outer tube 14, the pressing body 34 will remain held within the through slit 18. Furthermore, by applying a fixing support jig for the inner and outer tubes between one end of each of the tripod sections 404 of the support part of the stand 400 and the outer tube 14, each of the tripod sections 404 can be made openable and closable. When used for performance, each tripod section 404 can be opened by moving one end of each of the tripod sections 404 downward relative to the outer tube 14, making it possible to support each of the tripod sections 404 as a stand. Meanwhile, when storing or transporting, each tripod section 404 can be closed by moving one end of each of the tripod sections 404 upward relative to the outer tube 14, making it less bulky.

[0087] Fig. 49 shows an example of application to a bicycle. The fixing and supporting jig for the inner and outer tubes 12, 14 employs the fifteenth embodiment. That is, by adopting the pressing lever mechanism 300 which can be pushed down by hand, the fitting length of the inner and outer tubes 12, 14 can be adjusted when adjusting the height of the saddle 502 and / or the handle 504. By adjusting the fitting, the fitting portion of the inner and outer tubes 12, 14 can be fixed and held in place with a single touch, and the saddle 502 and / or the handlebars 504 can be reliably prevented from slipping down while riding a bicycle, for example. This can be prevented, and the height of the saddle 502 and / or the handlebars 504 can be adjusted again. When adjusting the inner and outer tubes 12, 14, the relative movement of the inner and outer tubes 12, 14 is made free by pushing up the lever of the pressing lever mechanism 300 in the opposite direction with a single touch, and the pressing force of the outer tube 14 against the inner tube 12 caused by pushing down the lever of the pressing lever mechanism 300 can be adjusted by the shape of the rotating part 303 of the pressing lever mechanism 300 or the amount by which the pin 304 is screwed into the outer tube 14 or the tubular base part 30.

[0088] 50 shows an example of application to a table. The fixing and supporting jig for the inner and outer tubes 12 and 14 employs the thirteenth embodiment. That is, by adopting a fastening screw portion 24 that can be tightened by hand and a pressing body 34 with a V-shaped cross section in each of the four legs 604 of the table body 602, the fastening screw portion 24 is located under the table and facing inward, so that it does not stand out from the outside, and by tightening the fastening screw portion 24, the fitting portions of the inner and outer tubes 12, 14 can be fixed and held in place, making it suitable as a decorative table indoors, and also as a temporary dining table when outdoor activities are carried out in a tent, and by shortening the length of the legs, it can be transported to the site without being bulky.

[0089] 51 shows an example of application to a temporary tent frame. The fixing support jig for the inner and outer pipes 12, 14 employs the fifteenth embodiment. That is, in a temporary tent frame in which a three-dimensional framework is formed by fitting multiple sets of inner and outer tubes 12, 14, by employing the pressing lever mechanism 300 which can be pressed down by hand, when assembling the temporary tent, the fitting length of the inner and outer tubes 12, 14 can be adjusted and the fitting parts of the inner and outer tubes 12, 14 can be fixed and held with one touch, and even in the case of bad weather and strong winds, for example, it is possible to reliably prevent the three-dimensional framework from collapsing, and when disassembling, by pushing up the lever of the pressing lever mechanism 300 in the opposite direction with one touch, the inner and outer tubes 12, 14 can move freely relative to each other, and even multiple sets of inner and outer tubes 12, 14 can be disassembled without much effort. At that time, the pressing force of the outer tube 14 against the inner tube when the lever of the pressing lever mechanism 300 is pressed down can be adjusted by the shape of the rotating part 303 of the pressing lever mechanism 300 or the amount of screwing of the pin 304 into the outer tube 14 or the tubular base part 30. Furthermore, when transporting to the site, the temporary tent frame can be made compact by adjusting the fitting length of the inner and outer pipes 12, 14, so that it can be transported without being bulky.

[0090] 52 and 53 show an example of application to a spur joint. The fixing and supporting jig for the inner and outer tubes 12 and 14 employs the 15th embodiment. That is, the outer and inner tubes 12 and 14 are fitted together, and the outer tube 14 has a grip portion 804 at the tip thereof, and the inner tube 12 has a U-shaped portion 802 at the tip thereof. By adopting the pressing lever mechanism 300, when adjusting the overall length of the stab, the fitting length of the inner and outer tubes 12, 14 can be adjusted and the fitting portion of the inner and outer tubes 12, 14 can be fixed and held with one touch. For example, when pressing the U-shaped portion 802 provided at the tip of the inner tube of the stab against the attacker, The fitting portion of the inner and outer tubes 12 and 14 can be securely fixed and held, and when the overall length of the fork is to be adjusted again, the lever of the pressing lever mechanism 300 can be pushed up in the opposite direction with a single touch, allowing the inner and outer tubes 12 and 14 to freely move relative to each other. 2 may be pinched and twisted by the body of the attacking party, so it is important to prevent the relative rotation of the inner and outer tubes 12, 14 in the longitudinal direction. The pressing force of the outer tube 14 against the inner tube when the lever of the pressing lever mechanism 300 is pressed down can be increased by changing the shape of the rotating part 303 of the pressing lever mechanism 300 or the amount of screwing of the pin 304 into the outer tube 14 or the tubular base part 30. In addition, in order to prevent the relative rotation of the inner and outer tubes 12, 14 in the longitudinal direction, a long groove 130 or a plurality of holes 128 spaced apart from each other in the longitudinal direction may be provided on the outer circumferential surface 15 of the inner tube 12 as in the first embodiment, and the tip of the fastening screw part 24 may be inserted into the long groove 130 or a predetermined hole 128 for reinforcement. Note that FIG. 53 shows a modified example in which the direction of the pressing lever mechanism 300 is changed from a direction perpendicular to the extension direction of the inner and outer tubes 12, 14 to a direction along the extension direction of the inner and outer tubes 12, 14. EXAMPLES

[0091] In order to confirm the effects of the present invention, the inventors manufactured a prototype and carried out a limit load test. The prototype comprises an inner pipe 12 made of metal or resin, an outer pipe 14 fitted to the inner pipe 12, a tubular portion 102 firmly fixed to the end of the outer pipe 14 and provided with a female screw portion 72 and a pair of through slits 18 sandwiching the female screw portion 72, a metal pressing body having a U-shaped cross section with a clearance hole 32, and a fastening screw having a male screw portion 26 screwed into the female screw portion 72 of the outer pipe 14 through the clearance hole 32 of the pressing body. As a comparative example, a jig was prepared in which a pair of overhanging flanges 116 facing each other in the longitudinal direction of the pipe were provided on the tubular portion 102 as a conventional product, and the clearance between the pair of overhanging flanges 116 was narrowed by tightening the fastening screw against the female screw portions 72 provided on each overhanging flange 116, thereby pressing the inner peripheral surface of the outer pipe 14 against the outer peripheral surface 15 of the inner pipe 12. The specific test method was to apply a predetermined torque to the screw using a hammer trench, and in this state the pressing surface of the pressing body was pressed against the outer peripheral surface 15 of the inner tube 12. In this state, the lower end of the outer tube 14 was placed on a horizontal test stand, and the integrated structure of the inner and outer tubes 12, 14 via the tubular portion 102 was fixed upright. A compressive load was then applied from the upper end of the inner tube 12 in the vertical direction, which is the extension direction of the inner and outer tubes, to measure the critical compressive load at which the outer tube 14 began to move relative to the inner tube 12. For each of several prototypes, the change in limit compressive load was ascertained using a specified torque as a parameter.

[0092] The test conditions are shown in Figure 29, and the test results are shown in Figures 30 to 32. In each case, as the load was applied, a slight compression specific to the material of the prototype occurred, and a limit load was reached at which the prototype could no longer support the inner and outer tubes 12, 14 in a fixed position. After that, the load decreased with movement, and in this test, the limit load under a specified torque was measured.

[0093] According to Figure 29, outer tube 14 is made of brass, 32φ, wall thickness 4 mm, inner tube 12 is made of brass, thread M Assuming a torque of 10 (pitch 1.5 mm), the torque is approximately 30 N, which means the ultimate supporting load is approximately 400 kg. It was confirmed that if torque is applied mechanically, it is fully applicable not only to stands for everyday items, but also to industrial stands installed outdoors, such as stands for solar panels. Furthermore, according to these results, when the supporting load is 100 kg, the required torque is approximately 7.5 N, which is one-quarter of 30 N, and is approximately five times the maximum torque of 1.6 N that can be generated by hand. It was confirmed that by enlarging the grip diameter by five times, it is practically possible to grip it by hand and use hand force to apply a torque sufficient to withstand a supporting load of 100 kg. 30 to 32, for a maximum torque of 1.6N applied by hand, the limit support load of the conventional product is approximately 200N, whereas the limit support load of the prototype in this study is 800N, which is approximately four times that amount; for a torque of 0.8N within the range of hand force, the limit support load of the ABS resin inner and outer tubes 12, 14 is approximately 90N, whereas the limit support load of the prototype in this study is 270N, which is approximately three times that amount; and it was confirmed that in the case of the ABS resin inner and outer tubes 12, 14, a shallow scratch-like depression was formed in the longitudinal direction of the tube at the contact portion of the pressing surface on the outer surface of the inner tube 12. In addition, when the inner tube 12 is made of resin, the pressing surface of the pressing body 34 is pressed against the outer peripheral surface 15 of the inner tube 12 by tightening the fastening screw. Therefore, if the area of ​​the pressing surface is too small, the pressing pressure against the outer peripheral surface 15 of the inner tube 12 will increase. Even if the thickness of the inner tube 12 is sufficient to prevent deformation of the inner tube 12 itself when supporting the longitudinal load of the inner and outer tubes 12, 14, the outer peripheral surface 15 of the inner tube 12 may be scratched or, in some cases, dented. Therefore, it is considered best to adjust the area of ​​the pressing surface of the pressing body 34, taking into consideration the hardness of the resin of the inner tube 12, so that the pressing pressure is within a range that prevents damage to the outer peripheral surface 15 of the inner tube 12 even when the fastening screw is tightened by hand. As described above, this test confirmed that stable load support by manual force within a practical range is possible by selecting the diameter of the torque applying grip 132 according to the load to be supported.

[0094] Although the embodiment of the present invention has been described in detail above, those skilled in the art can make various modifications and changes without departing from the scope of the present invention. For example, in the first embodiment, from the viewpoint of protecting the outer surface of the inner tube 12, it was explained that the tip of the male thread portion 26 of the fastening screw portion 24 penetrates the female thread portion 20 of the outer tube 14 or the tubular base portion 102 so as not to come into contact with the outer surface of the inner tube 12. However, without being limited to this, when the inner and outer tubes 12, 14 are made of metal, in addition to the pressing surface 54 of the pressing body 34, the tip of the male thread portion 26 of the fastening screw portion 24 comes into contact with the outer surface of the inner tube 12, thereby making it possible to more firmly fix the position of the outer tube 14 relative to the inner tube 12, which is effective in supporting a heavy object at a predetermined height by either the inner or outer tube 12, 14 with the inner and outer tubes 12, 14 oriented vertically. For example, in the third embodiment, a single through slit 18 is provided on the outer peripheral surface 1616 of the outer tube 14 within a predetermined distance from the female thread portion 20, but this is not limited to this. As in the second embodiment, a tubular base portion 30 may be provided that is attached and fixed to one end of the outer tube 14, and a single through slit 18 may be provided on the outer peripheral surface 16 of the tubular base portion 30 within a predetermined distance from the female thread portion 20.

[0095] For example, in the first embodiment, it was described that the fastening screw portion 24 has a male thread portion 26 and a head portion 58 that is gripped with the fingers and rotated, while the female thread portion 20 is provided on the outer peripheral surface 1616 of the outer tube 14. However, without being limited to this, the male thread portion 26 may be provided on the outer peripheral surface 1616 of the outer tube 14, and the fastening screw portion 24 may be in the form of a nut that screws onto the male thread portion 26. For example, in the first embodiment, a single length adjustment jig is provided at a predetermined position on the inner and outer tubes 12, 14, but this is not limited to this. For example, when a pair of through slits 18 are provided at intervals in the longitudinal direction of the inner and outer tubes 12, 14, multiple sets of such pairs of through slits 18 may be provided in the circumferential direction of the inner and outer tubes 12, 14, and multiple pressing portions 22 may be provided accordingly. In addition, the second to seventh embodiments may be combined in any manner. For example, when the outer tube 14 is thin and the outer peripheral surface of the inner tube 12 is slippery, a tubular protrusion portion 65 may be provided on the outer peripheral surface 1616 of the outer tube 14 and a protective plate 78 may be provided between the inner tube 12 and the outer tube 14. For example, when the inner and outer tubes 12, 14 are to be held fixed for a long period of time while suppressing relative rotation in the extension direction between them, a coil spring 76 may be provided between the outer peripheral surface 1616 of the outer tube 14 and the pressing portion 22, and the direction of the pair of through slits 18 and the female screw portion 20 between the pair of through slits 18 may be oblique to the extension direction of the inner tube 12 and the outer tube 14. [Brief description of the drawings]

[0096] [Figure 1] 1 is a partial perspective view of an outer tube 14 of a length adjustment jig according to a first embodiment of the present invention. FIG. [Diagram 2] 2 is a perspective view of a fastening screw portion 24 of the length adjustment jig according to the first embodiment of the present invention. FIG. [Diagram 3] 2 is a perspective view of a pressing body 34 of the length adjusting jig according to the first embodiment of the present invention. FIG. [Figure 4] 2 is a perspective view of a pressing body 34 of the length adjusting jig according to the first embodiment of the present invention. FIG. [Diagram 5] 1 is a cross-sectional view of a length adjustment jig according to a first embodiment of the present invention. FIG. [Figure 6] 1 is a vertical sectional view of a length adjustment jig according to a first embodiment of the present invention. [Figure 7] 1 is a schematic cross-sectional view of a length adjustment jig according to a first embodiment of the present invention. [Figure 8] FIG. 11 is a perspective view of a length adjustment jig according to a second embodiment of the present invention. [Figure 9] FIG. 11 is a perspective view of a length adjustment jig according to a second embodiment of the present invention. [Figure 10] 7 is a view similar to FIG. 6 showing a length adjusting jig according to a second embodiment of the present invention. [Figure 11] FIG. 11 is an exploded perspective view of a length adjustment jig according to a third embodiment of the present invention. [Figure 12]FIG. 11 is an exploded perspective view of a length adjustment jig according to a fourth embodiment of the present invention. [Figure 13] FIG. 11 is an exploded perspective view of a length adjustment jig according to a fourth embodiment of the present invention. [Figure 14] FIG. 13 is an exploded perspective view of a length adjustment jig according to a fifth embodiment of the present invention. [Figure 15] FIG. 13 is an exploded perspective view of a length adjustment jig according to a sixth embodiment of the present invention. [Figure 16] FIG. 13 is an exploded perspective view of a length adjustment jig according to a sixth embodiment of the present invention. [Figure 17] FIG. 13 is an exploded perspective view of a length adjustment jig according to a modified example of the sixth embodiment of the present invention. [Figure 18] FIG. 13 is a perspective view of a length adjustment jig according to a seventh embodiment of the present invention. [Figure 19] 1 is a perspective view of a length adjustment jig according to a first embodiment of the present invention, applied to a musical instrument stand; [Figure 20] 1 is a perspective view of a length adjustment jig according to a first embodiment of the present invention, applied to a microphone stand; [Figure 21] 1, but showing a length adjustment jig according to an eighth embodiment of the present invention. FIG. [Figure 22] FIG. 13 is a perspective view of a length adjustment jig according to a ninth embodiment of the present invention, applied for use as an earthquake brace. [Figure 23] FIG. 11 is a perspective view of a modified example of the length adjustment jig according to the first embodiment of the present invention. [Figure 24] FIG. 19 is a perspective view of a device for supporting a rectangular plate-shaped weight and adjusting an inclination angle according to a tenth embodiment of the present invention. [Diagram 25] FIG. 23 is a partially enlarged perspective view of an inclination angle adjusting jig of a device for supporting and adjusting the inclination angle of a rectangular plate-shaped weight according to a tenth embodiment of the present invention. [Figure 26] 13 is a partial cross-sectional view taken along line AA of the inclination angle adjusting jig of the device for supporting and adjusting the inclination angle of a rectangular plate-shaped weight according to the tenth embodiment of the present invention. FIG. [Figure 27] 11 is a perspective view of a direction and position adjustment device for a traffic sign T according to an eleventh embodiment of the present invention. FIG. [Figure 28] 12 is a perspective view of a modified example of a direction and position adjustment device for a traffic sign T according to the 11th embodiment of the present invention. FIG. [Figure 29] 1 is a table showing test conditions for a limit support load measurement test. [Diagram 30] 1 is a graph showing the results of a limit support load measurement test, with the vertical axis representing the support load and the horizontal axis representing the displacement. [Diagram 31] 1 is a graph showing the results of a limit support load measurement test, with the vertical axis representing the support load and the horizontal axis representing the displacement. [Diagram 32] 1 is a graph showing the results of a limit support load measurement test, with the vertical axis representing the support load and the horizontal axis representing the displacement. [Diagram 33] 13 is a perspective view of an inner and outer tube around a length adjustment jig according to a modified example of the first embodiment of the present invention. FIG. [Diagram 34] 13 is a side cross-sectional view of an inner and outer tube around a length adjustment jig according to a modified example of the first embodiment of the present invention. FIG. [Diagram 35] 13 is a perspective view of inner and outer tubes around a length adjustment jig according to another modified example of the first embodiment of the present invention. FIG. [Diagram 36] FIG. 20 is a partially enlarged perspective view of the area around the length adjusting jig in FIG. 19. [Figure 37] FIG. 20 is a perspective view of the stand in FIG. 19 in a folded state. [Figure 38] FIG. 23 is a partial cross-sectional side view of the inner and outer tubes around a length adjusting jig according to a thirteenth embodiment of the present invention. [Figure 39] FIG. 23 is a partial cross-sectional side view of the inner and outer tubes around a length adjusting jig according to a thirteenth embodiment of the present invention. [Diagram 40] FIG. 23 is a partial cross-sectional side view of the inner and outer tubes around a length adjusting jig according to a thirteenth embodiment of the present invention. [Diagram 41] FIG. 23 is a partial cross-sectional side view of the inner and outer tubes around a length adjusting jig according to a fourteenth embodiment of the present invention. [Diagram 42] FIG. 23 is a partial perspective view of the periphery of a length adjustment jig according to a fifteenth embodiment of the present invention. [Diagram 43] FIG. 23 is a partial perspective view of the periphery of a length adjustment jig according to a fifteenth embodiment of the present invention. [Diagram 44]FIG. 23 is a front view of the periphery of a length adjustment jig according to a fifteenth embodiment of the present invention. [Diagram 45] FIG. 43 is a cross-sectional view taken along line AA in FIG. 42 of the fifteenth embodiment of the present invention. [Figure 46] FIG. 45 is a front view of a modified example of the fifteenth embodiment of the present invention, corresponding to FIG. 44. [Figure 47] 3A and 3B are partial cross-sectional and partial perspective views of a variation of the pin 304 of the present invention. [Figure 48] FIG. 1 is an overall perspective view of a fixing and holding jig of the present invention applied to a music stand. [Figure 49] 1 is an overall perspective view of a fixing holding jig of the present invention applied to a bicycle; [Figure 50] FIG. 1 is an overall perspective view of a fixing and holding jig of the present invention applied to a table. [Figure 51] FIG. 1 is an overall perspective view of a fixing and holding jig of the present invention applied to a tent frame. [Figure 52] FIG. 2 is an overall perspective view of a fixing and holding jig of the present invention applied to a crotch joint. [Figure 53] FIG. 13 is an overall perspective view of a modified example in which the fixing holding jig of the present invention is applied to a crotch joint. [Explanation of symbols]

[0097] D Distance between a pair of slits W Rectangular plate-shaped heavy object P Plane formed by both support bars θ Tilt angle R1 Minimum radius R2 intermediate radius R3 maximum radius L Length of pressing lever 10 Length adjustment jig 12 Inner tube 14 Outer tube 15 Outer surface 16 Outer surface 17 Inner surface 18 Through slit 20 Female thread 22 Pressing part 24 Fastening screw 26 Male thread 28 One end 30 Tubular base 32 Stupid Hole 34 Pressing body 34 36 Shank 38 Bottom side 40 Annular Surface 42 Protrusion 44 Top side 46 Contact surface 48 Central part 50 End 54 Pressing surface 56 Slope 58 Head 65 Tubular protrusion 70 Nut 72 Female thread 74 Male thread 76 Coil Spring 78 Protective plate 80 Shallow Groove 82 Elastic part 84 Shelf side fixing part 86 Contact surface 88 Reception Department 89 Contact surface 90 Ceiling side fixing part 92 Contact surface 94 Reception Department 96 Lower end surface 98 Upper end surface 100 Rectangular plate-shaped weight support and tilt angle adjustment device 101 Tilt angle adjustment jig 102 Tubular part 104 First support bar 106 Upper end 108 Axis 110 Bottom end 112 Second Support Bar 114 Tip surface 116 Pair of overhanging flanges 118 End 120 First through hole 122 Second through hole 124 X-shaped cross member 126 Diagonal Tube 128 holes 130 Long slot 132 Torque applying grip 140 Inner surface 142 External surface 154 Aperture 200 Grub Screw 201 End face 202 slotted hole 204 Insertion hole 206 Female thread 208 Tip 300 Press lever mechanism 302 Grip lever part 303 Rotating part 304 Pin 306 Axis 308 Curved Surface 310 Cutout 312 Tip 314 Space 316 Inside 318 Through hole 320 Hollow part 324 Bottom 326 Female thread 328 Fool's Hole 330 Head 332 Recess 334 Aperture 400 Music Stand Stand 402 Music stand 404 Tripod part 500 Bicycles 502 Saddle 600 Tables 602 Table surface 700 Temporary tent frame 702 Legs 704 Roof 800 Sashimata 802 U-shaped part 804 Grip

Claims

1. a tubular portion having an outer circumferential surface with a female screw portion and at least one through hole within a predetermined range from the female screw portion; a first support bar extending at a predetermined angle with respect to the extension direction of the tubular portion and having a grounded lower end; a pivot connecting the upper end of the first support bar to the tubular portion, the upper end of the first support bar being rotatably connected to the tubular portion around the pivot; a second support bar slidably fitted within the tubular portion, extending along the extension direction of the tubular portion and having a grounded lower end; at least one pressing portion passing through the through hole from the outer circumferential surface of the tubular base portion and abutting against the outer circumferential surface of the second support bar; and a fastening screw portion capable of pressing and fixing the pressing portion against the outer circumferential surface of the second support bar, the tip surface of the pressing portion being capable of surface contact with the outer circumferential surface of the second support bar. the clamping screw portion has a male thread portion that can be threaded onto the female thread portion, and the pressing portion has a clear hole through which the male thread portion can pass; by moving the first support bar within a plane formed by both support bars so that the distance between the lower ends of both support bars changes, the upper end of the first support bar rotates relative to the tubular portion around the pivot axis while adjusting the fitting position of the tubular base portion with respect to the second support bar, and then the clamping screw portion threads the male thread portion into the female thread portion via the clear hole, while the pressing portion passes through the through hole, and the tip end surface is pressed and fixed against the outer peripheral surface of the second support bar in a surface-to-surface contact manner, thereby making it possible to adjust the inclination angle of the second support bar with respect to the ground surface.

2. 2. The tilt angle adjustment jig according to claim 1, wherein the tubular portions each further have a pair of opposing overhanging flanges that overhang from their outer surfaces in a direction intersecting the extension direction of the tubular portions, the pair of overhanging flanges each having a first through hole capable of receiving a corresponding end of the pivot shaft, the upper end of the first support bar is provided with a second through hole in a direction intersecting the extension direction of the first support bar, and the upper end of the first support bar is positioned between the pair of overhanging flanges so that the first through hole and the second through hole are aligned, and the pivot shaft is provided to pass through each of the first through holes and the second through hole.

3. 2. The device for supporting and adjusting the tilt angle of a rectangular plate-shaped heavy object according to claim 1, wherein a pair of the tilt angle adjusters are provided so that the planes formed by both support bars are parallel, and while each of the opposing edges of a rectangular plate-shaped heavy object is supported by the second support bars of each of the tilt angle adjusters, the rectangular plate-shaped heavy object is supported at four points by the lower ends of the first support bars and the second support bars of each of the tilt angle adjusters, and the tilt angle of the rectangular surface of the rectangular plate-shaped heavy object is adjusted by adjusting the fitting position of the tubular base part of each of the tilt angle adjusters with respect to the corresponding second support bars of each of the tilt angle adjusters.

4. a step of machining, 3D printer modeling, or lost wax processing a pair of through slits on the outer surface corresponding to the fitting portion of the outer tube for a solid or hollow inner tube and a hollow outer tube that fit together; a step of preparing a press plate having a load receiving surface that receives a load toward the inner tube and a pair of press bodies that extend from the surface opposite the load receiving surface toward the opposite side of the load receiving surface, each of the pair of press bodies having a press surface at its tip that can abut against the outer peripheral surface of the inner tube; a step of deforming the pair of press bodies so that the spacing between the tip ends of the pair of press bodies changes, so that the inner or outer surface of the through slit corresponding to each of the pair of press bodies can form a guide surface and each of the pair of press bodies can be press-fitted; a step of fixing the inner and outer tubes together in the longitudinal direction of the tubes while pressing and fixing the outer surface of the inner tube in a surface contact manner and pressing and fixing the outer surface of the inner tube opposite the surface contact portion of the pressing portion with respect to the inner tube against the inner surface of the outer tube to form an overall length adjustment jig for the inner and outer tubes, or an inclination angle adjustment jig that rotatably connects the inner and outer tubes via a pivot and adjusts the fitting position of the inner and outer tubes, or an inner and outer tube integral fixing and holding jig that fixes and holds the inner and outer tubes together, or a fixed support jig for a stand that supports and fixes heavy objects with either the inner or outer tube.

5. a step of machining, 3D printer modeling, or lost wax processing a pair of through slits on the outer surface corresponding to the fitting portion of the outer tube, for a solid or hollow inner tube and a hollow outer tube that fit together; and a step of preparing a press plate having a load receiving surface that receives a load toward the inner tube and a pair of press bodies that extend from the surface opposite the load receiving surface toward the opposite side of the load receiving surface, each of the pair of press bodies having a press surface at its tip that can come into contact with the outer peripheral surface of the inner tube, wherein the inner surface or outer surface of the through slit corresponding to each of the pair of press bodies forms a guide surface, so that each of the pair of press bodies can be press-fitted, and a first angle of the extension direction of each of the pair of press bodies to the load receiving surface toward the tip is different from a second angle of the extension direction of the corresponding through slit to the outer peripheral surface of the inner tube. and setting the bending rigidity at the tip of each of the pair of pressing bodies in accordance with the material of the pressing plate, the length to the tip of each of the pair of pressing bodies and the area of ​​each of the pressing surfaces so that the first angle can be changed by deforming each of the pair of pressing bodies by manual force and the pair of pressing bodies can be press-fitted into the corresponding through slit. At a predetermined fitting position, the pressing parts are pressed and fixed by manual force toward the outer peripheral surface of the inner pipe in a surface contact manner with the outer peripheral surface of the inner pipe, and the outer peripheral surface of the inner pipe on the opposite side of the surface contact part of the pressing parts with respect to the inner pipe is pressed and fixed by manual force. A method for manufacturing an integrated structure of inner and outer tubes, characterized by including a step of completing the process by fixing the inner and outer tubes together in the longitudinal direction of the tubes while pressing and fixing them against the inner surface of the tube to form an overall length adjustment jig for the inner and outer tubes, or an inclination angle adjustment jig that rotatably connects the inner and outer tubes via a pivot and adjusts the fitting position of the inner and outer tubes, or an inner and outer tube integral fixing and holding jig that fixes and holds the inner and outer tubes together, or a fixed support jig for a stand that supports and fixes heavy objects with either the inner or outer tubes.

6. 6. The method for manufacturing an integral structure of inner and outer pipes according to claim 5, wherein the pressing plate has a U-shaped cross section along the extension direction of the inner and outer pipes, and the pair of through slits have V-shaped cross sections along the extension direction of the inner and outer pipes.

7. 6. The method for manufacturing an integral structure of inner and outer pipes according to claim 5, wherein the pressing plate has a U-shaped cross section along the extension direction of the inner and outer pipes, and the pair of through slits have a curved V-shaped cross section along the extension direction of the inner and outer pipes.

8. 6. The method for manufacturing an integral structure of inner and outer pipes according to claim 5, wherein the pressing plate has a V-shaped cross section along the extension direction of the inner and outer pipes, and the pair of through slits have U-shaped cross sections along the extension direction of the inner and outer pipes.

9. 6. The method for manufacturing an integral structure of inner and outer pipes according to claim 5, wherein the pressing plate has a curved V-shaped cross section along the extension direction of the inner and outer pipes, and the pair of through slits have U-shaped cross sections along the extension direction of the inner and outer pipes.

10. 6. A method for manufacturing an integrated structure of inner and outer pipes according to claim 5, wherein the pressing plate has a V-shaped cross section along the extension direction of the inner and outer pipes, and the pair of through slits have V-shaped cross sections along the extension direction of the inner and outer pipes.

11. 6. The method for manufacturing an integral structure of inner and outer pipes according to claim 5, wherein the pressing plate has a U-shaped cross section along the extension direction of the inner and outer pipes, and the pair of through slits have U-shaped cross sections along the extension direction of the inner and outer pipes.

12. 6. The method for manufacturing an integral structure of inner and outer pipes according to claim 5, wherein the pair of pressing bodies are configured to be oriented to intersect with each other, and the bending rigidity at the tip end of one or both of the pressing bodies is set in accordance with the material of the pressing plate, the length to the tip end of each of the pair of pressing bodies, and the area of ​​each of the pressing surfaces, so that the first angle can be changed by manual deformation of each of the pair of pressing bodies and the corresponding through slit.

13. When the outer tube is fitted onto the inner tube so as to be relatively movable in the longitudinal direction of the tube, the outer tube has a load receiving surface that receives a load directed toward the inner tube, and a pressing plate having a pair of pressing bodies that extend from the surface opposite the load receiving surface toward the opposite side of the load receiving surface, each of the pair of pressing bodies having a pressing surface at its tip end that can come into contact with the outer circumferential surface of the inner tube, the outer tube has a pair of through slits that penetrate in the thickness direction and through which one of the pair of pressing bodies can pass, the pair of pressing bodies are spaced apart from each other so that at least a part of each pressing surface is located within an opening formed in the outer circumferential surface of the corresponding through slit, and the inner circumferential surfaces of the through slits corresponding to each of the pair of pressing bodies form guide surfaces, so that each of the pair of pressing bodies can be press-fitted. a first angle relative to the surface of the inner pipe in the extension direction of the corresponding through slit is set to be different from a second angle relative to the outer peripheral surface of the inner pipe in the extension direction of the corresponding through slit, and the bending rigidity at the tip of each of the pair of pressing bodies is set in accordance with the material of the pressing plate, the length to the tip of each of the pair of pressing bodies, and the area of ​​each pressing surface so that the first angle can be changed by manual deformation of each of the pair of pressing bodies and they can be pressed into the corresponding through slit, whereby, when a load is applied, the pressing surface abuts against the outer peripheral surface of the inner pipe, making the outer pipe immovable relative to the inner pipe in the longitudinal direction of the pipe, and when the load is released, the pair of pressing bodies are pressed into and held in the pair of through slits by their elastic restoring force to their original shape, while the outer pipe can move relative to the inner pipe in the longitudinal direction of the pipe.

14. a fixing and holding jig interposed between an inner tube and an outer tube fitted together to fix and hold the inner and outer tubes, the outer surface of the outer tube being provided with a pair of through slits spaced apart from each other, and at least one pressing portion penetrating the through slit from the outer peripheral surface of the outer tube and contacting the outer peripheral surface of the inner tube, the pressing portion having a pair of pressing bodies spaced apart from each other and capable of pressing against the outer peripheral surface of the inner tube by surface contact at two points, and a load receiving surface for pressing the pair of pressing bodies against the outer peripheral surface of the inner tube, each of the pair of pressing bodies having a pressing end surface capable of pressing against the outer peripheral surface of the inner tube, and the pressing body of the pair of pressing bodies that is closer to the end of the fitting portion between the outer tube and the inner tube of the outer tube has an insertion hole formed in the thickness direction of the pressing body from the side of a pair of opposing side surfaces constituting the pressing body that is closer to the end of the outer tube, a slender hole with a circular cross section, the slender hole having a circular opening on the end surface and extending through to the side surface closer to the end of the outer tube, the slender hole having a circular cross section, the slender hole having a circular opening on the end surface and extending through to the side surface closer to the end of the outer tube; an insertion rod insertable from the circular opening into the slender hole; by inserting the pair of pressing bodies into the pair of through slits, the slender hole communicates with the insertion hole; and by inserting the tip ends of the insertion rod into the insertion hole, the pair of pressing bodies are held within the pair of through slits.

15. 15. The fixture for integrally fixing and holding an inner and outer tube according to claim 14, wherein the elongated hole has a female thread portion, the insertion rod is a set screw that can be threaded into the female thread portion of the elongated hole, and the pair of pressing bodies are detachably held in the pair of through slits by inserting a tip end of the set screw into the elongated hole while threading it into the elongated hole.

16. 16. The jig for fixing and holding an inner and outer tube together as described in claim 15, wherein the first elongated hole has an elliptical cross section elongated vertically in the direction of movement of the pressing body so that the pressing body can move within a predetermined range when the set screw is inserted into the insertion hole.

17. The jig for integrally fixing and holding an inner and outer pipe according to claim 15 or 16, wherein the female thread portion is provided in the elongated hole from near the side surface close to the end of the outer pipe to the side surface.

18. a fixing and holding jig interposed between an inner tube and an outer tube fitted together to fix and hold the inner and outer tubes, the outer surface of the outer tube being provided with a pair of through slits spaced apart from each other, and at least one pressing portion passing through the through slit from the outer peripheral surface of the outer tube and abutting against the outer peripheral surface of the inner tube, the pressing portion having a pair of pressing bodies spaced apart from each other and capable of pressing against the outer peripheral surface of the inner tube by surface contact at two points, and a load receiving surface for pressing the pair of pressing bodies against the outer peripheral surface of the inner tube, each of the pair of pressing bodies having a pressing end surface capable of pressing against the outer peripheral surface of the inner tube, and further having a pressing lever having an annular circumferential surface which rotates about an axis parallel to the load receiving surface while abutting against the load receiving surface, the annular circumferential surface having a curved shape in which the radius from the axis increases from a first radius to a second radius, and the pair of pressing bodies being pressed against the outer peripheral surface of the inner tube by the rotation of the pressing lever; the pressing lever is movable in the thickness direction of the slit within the corresponding through slit, and by rotating the pressing lever around an axis provided at a predetermined height from the outer peripheral surface of the outer tube, the pressing body starts to press against the outer peripheral surface of the inner tube at a rotation position corresponding to an intermediate radius between the first radius and the second radius, and finishes pressing against the outer peripheral surface of the inner tube at a rotation position corresponding to the second radius, so that the pressing end surface is brought into surface contact with the outer peripheral surface of the inner tube, and the outer peripheral surface of the inner tube opposite to the surface contact portion of the pressing end surface with the inner tube is pressed and fixed against the inner peripheral surface of the outer tube, the pair of through slits are provided in a tubular base portion that is attached and fixed to the outer peripheral surface of one end portion of the outer tube, and the inner tube is fitted to the outer tube via the tubular base portion; the pressing lever further comprises a pin standing upright from the outer circumferential surface of the outer tube or the tubular base portion, and a pivot shaft fixed to the pin and extending parallel to the outer circumferential surface, the pressing lever having a rotating part pivotally supported on the pivot shaft and a grip part extending from the outer edge of the rotating part, the rotating part having the annular circumferential surface that abuts against the load-receiving surface, the rotating portion is pivotally supported on the pivot shaft so that, when the pressing lever rotates to a position corresponding to the intermediate radius, a direction connecting the tip of the grip portion and the pivot shaft is in a substantially upright position, and, when the pressing lever rotates to a position corresponding to the second radius, a direction connecting the tip of the grip portion and the pivot shaft is in a pressed-down position; the rotating portion has the annular circumferential surface that has the second radius over a predetermined central angle range with respect to the pivot axis in accordance with a desired pressing force applied by the pair of pressing bodies to the outer circumferential surface of the inner tube, A fixture for fixing and holding inner and outer tubes together, characterized in that the pin is screwed and fixed to the outer peripheral surface of the outer tube or the tubular base portion, and the height of the pivot axis can be adjusted by adjusting the amount of screwing.

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