Fixing support jig and method for fixing and supporting inner and outer pipes

Abstract

To provide a fixing support tool and a fixing support method for inner and outer pipes that improve the usability in stand height adjustment with a simple structure for application to a music or medical stand.SOLUTION: A fixing support tool has a tubular base part which has a through hole in an outer peripheral surface, is rotatable in an axial direction of an outer pipe, and can be fitted externally to an outer peripheral surface of one end part of the outer pipe, and the tubular base part consists of a first outer fitting part which extends from the one end part toward the outer pipe, has its inner peripheral surface opposed to the outer peripheral surface of the outer pipe across a first predetermined clearance, and is externally fitted to the outer pipe, and a second outer fitting part which extends from the one end part toward an inner pipe, has its inner peripheral surface opposed to the outer peripheral surface of the inner pipe across a second predetermined clearance, and is externally fitted to the inner pipe, and further has: a press load receiving part which has a press load receiving surface; a press body which has a press end face penetrating the through hole to be pressed against the outer peripheral surface of the inner pipe, and is provided outside the tubular base part; and a single press load imparting part which places a press load on the press load receiving part.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a fixing and supporting jig and a method for fixing and supporting an inner and outer tube. More specifically, it relates to a fixing and supporting jig and a method for fixing and supporting an inner and outer tube, which have an improved usability due to a simple structure when adjusting the stand height for application to a music stand.

Background Art

[0002] The inventor of the present application has proposed, in Patent Document 1, a length adjusting jig that can adjust the overall length of an inner tube and an outer tube with a simple structure and a simple operation.

[0003] The length adjusting jig of the present invention is a length adjusting jig interposed between an inner tube and an outer tube that fit together. On the outer peripheral surface of the outer tube, a pair of through slits are provided at intervals from each other. Between the pair of through slits, a female screw portion is provided. A pressing portion that is positioned on the outer peripheral surface of the outer tube, penetrates the pair of through slits, and contacts the outer peripheral surface of the inner tube, and a tightening screw portion that can press and fix the pressing portion toward the outer peripheral surface of the inner tube are provided. The tightening screw portion has a male screw portion that can be screwed into the female screw portion. After adjusting the fitting position of the inner tube with respect to the outer tube, an opening facing the inner peripheral surface of the outer tube is provided, and without providing a pressing portion storage space protruding to the outside of the outer tube, the male screw portion is screwed into the female screw portion by the tightening screw portion, and the pressing portion is passed through the pair of through slits and pressed and fixed to the outer peripheral surface of the inner tube.

[0004] With the length adjustment jig having the above configuration, when adjusting the length of the fitting portion of the inner and outer tubes that fit together, the tip surface of the pressing portion is shaped to conform to the outer surface of the inner tube so that it can make surface contact with the outer surface of the inner tube, and the fitting position of the inner tube relative to the outer tube is adjusted, and the pressing portion is shaped to conform to the outer surface of the inner tube so that the tip surface of the pressing portion can make surface contact with the outer surface of the inner tube, and the fitting position of the inner tube relative to the outer tube is adjusted, and without providing a space for housing the pressing portion that has an opening facing the inner surface of the outer tube and protrudes to the outside of the outer tube, the male thread portion is screwed into the female thread portion provided on the outer surface of the outer tube by rotating the tightening screw portion, and the pressing portion within a predetermined range from the female thread portion is pressed and fixed by screwing in the tightening screw portion. By passing the through-hole through the inner tube, the tip surface can be pressed and fixed against the outer surface of the inner tube in a surface contact manner. With its simple structure, it is possible to adjust and fix the overall length of the inner and outer tubes with easy operation without requiring excessive tightening force.

[0005] However, when applying such length adjustment jigs to music stands, microphones, amplifiers, and other musical equipment, the following technical problems arise. In other words, if the fastening screw is on the left side, it is necessary to turn the fastening screw in the opposite direction with the fingers of the left hand, which is inconvenient for right-handed users. However, lifting heavy music stands, microphone stands, or amplifier stands and rotating the tube around its longitudinal axis to move the fastening screw from the left side to the right side is also laborious and inconvenient. Performers may need to adjust the height of their music stand when switching instruments during a performance, so it is desirable that the height can be easily adjusted using fastening screws. Furthermore, in orchestral and big band performances where multiple musicians are playing, it looks better to the audience if the direction of each musician's fastening screws is aligned. However, it is inconvenient to lift heavy music stand stands, microphone stands, and amplifier stands and adjust the direction of the fastening screws around the long side of the stand. The above problems also apply to medical stands where casters are provided on the end of the inner or outer tube opposite the fitting portion of the inner and outer tubes, making them movable, and where the end of the outer or inner tube opposite the fitting portion of the inner and outer tubes supports IV drips, monitors, and lighting. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Patent No. 7369944 [Disclosure of the Invention] [Problems that the invention aims to solve]

[0007] In view of the above technical problems, the object of the present invention is to provide a fixed support jig and a method for fixing and supporting inner and outer tubes that improves usability through a simple structure when adjusting the height of a stand, for use in music and medical stands. In view of the above technical problems, the object of the present invention is to provide a fixing support jig and a fixing support method for inner and outer tubes that can be applied to existing music stands and medical stands having an inner and outer tube fitting structure, while improving usability with a simple structure when adjusting the stand height, and while firmly fixing and holding the inner and outer tubes. [Means for solving the problem]

[0008] To achieve the above objectives, the fixed support jig of the present invention is A fixing support jig for fixing and supporting a heavy object at a predetermined height, wherein at least one of the inner tubes has a circular cross-section, both extending vertically and fitting together, and interposed between an inner tube and an outer tube, It has through holes on its outer surface, Rotatable in the axial direction of the outer tube, The outer tube has a tubular base portion that can be fitted onto the outer surface of one end of the outer tube, The tubular base portion is composed of a first external fitting portion that extends from one end toward the outer tube and whose inner circumferential surface is fitted onto the outer tube with a first predetermined clearance facing the outer circumferential surface of the outer tube, and a second external fitting portion that extends from one end toward the inner tube and whose inner circumferential surface is fitted onto the inner tube with a second predetermined clearance facing the outer circumferential surface of the inner tube. Furthermore, a pressing load receiving part having a pressing load receiving surface, Through the aforementioned through hole It has a pressing end face that can be pressed against the outer surface of the inner tube, Provided on the outside of the tubular base portion Pressing body and, A pressing load is applied to the aforementioned pressing load receiving part. single It has a pressing load application section, When supporting a heavy object with either the inner or outer tube, the fitting position of the inner tube to the outer tube is adjusted according to a predetermined height of the heavy object, and then the through hole of the tubular base portion, which is set to a desired rotational position centered on the longitudinal direction of the inner and outer tubes, single The pressing load application unit presses the pressing body toward the inner tube via the pressing load receiving surface, thereby causing the pressing end surface to make surface contact with the outer circumferential surface of the inner tube. At the same time, The configuration involves pressing and fixing the outer circumferential surface of the inner tube, opposite to the surface contact portion of the pressing end face with the inner tube, against the inner circumferential surface of the outer tube or the inner circumferential surface of the tubular base.

[0009] Furthermore, the inner diameter of the second outer fitting portion is set to be smaller than the inner diameter of the first outer fitting portion, and an annular shoulder portion is formed at the connection between the first outer fitting portion and the second outer fitting portion, and it is preferable to place the annular shoulder portion on one end of the outer tube. Furthermore, the pressing end face has a hardness such that it does not deform when pressed against the outer surface of the inner tube. The pressing end face is preferably formed to conform to the outer circumferential surface of the inner tube. Furthermore, the inner tube and the outer tube are both cylindrical in shape, and the outer surface of the inner tube is pressed against and fixed to the inner surface of the outer tube by pressing the outer surface of the inner tube opposite to the pressing and fixing portion by the pressing end face against the inner surface of the outer tube in a manner of vertical line contact, thereby fixing and supporting the outer tube with respect to the inner tube by three supports.

[0010] In addition, the tightening screw portion has a shank portion and a male screw portion extending downward from the lower surface of the shank portion. An annular surface is formed on the lower surface, surrounding the male screw portion. It is preferable to screw the male threaded portion into the female threaded portion through the clearance hole, so that the lower surface of the shank portion and the pressing load receiving surface of the pressing body come into contact, thereby integrally pressing and fixing the fastening threaded portion and the pressing body to the inner tube and screwing and fixing them to the outer tube. Furthermore, the tightening screw portion preferably has a head portion at the end of the shank portion opposite to the male screw portion end, which can be gripped and rotated with fingers. Furthermore, the fixed support jig is made of metal, and the pair of through holes are provided so as to extend in the circumferential direction of the inner and outer tubes, with a predetermined distance between them in the longitudinal direction of the inner and outer tubes, and the heavy object is supported at a predetermined height by either the inner or outer tube. Furthermore, it is preferable to fix and hold the inner and outer tubes in a predetermined fitting position while preventing the rotation of the tubular base by fastening the aforementioned fastening screws.

[0011] In addition, the pressing body on the side of the outer tube that is close to the end of the fitting portion between the outer tube and the inner tube has an insertion hole in the thickness direction of the pressing body, from the side of the pair of opposing sides of the pressing body that is close to the end of the outer tube, and the end face of the outer tube that is close to the fitting portion has an elongated hole with a circular cross-section that has a circular opening on the end face and extends through to the side of the outer tube that is close to the end of the outer tube, and further has an insertion rod that can be inserted from the circular opening into the elongated hole, and by inserting the pair of pressing bodies into the pair of through holes, the elongated hole communicates with the insertion hole, and the tip of the insertion rod is inserted into the insertion hole, thereby holding the pair of pressing bodies in the pair of through holes, the elongated hole has a female screw portion, and the insertion rod is a grub screw that can be screwed into the female screw portion of the elongated hole, and as the grub screw is screwed into the elongated hole, the tip of the insertion rod The pair of pressing bodies are preferably held detachably within the pair of through holes by being inserted into the holes. Furthermore, it may be a music stand having the fixed support jig described in claim 1, and supporting a music stand, instrument, microphone, or amplifier by the end of the inner tube or the outer tube opposite to the fitting portion of the inner and outer tubes. Furthermore, it may also be a medical stand having the fixed support jig described in claim 1, having casters provided on the end of the inner tube or the outer tube opposite to the fitting portion of the inner and outer tubes, being movable, and supporting an IV drip, monitor, and lighting by the end of the outer tube or the inner tube opposite to the fitting portion of the inner and outer tubes. [Best Mode for Carrying Out the Invention]

[0012] A first embodiment of the fixed support jig 10 of the present invention will be described in detail below with reference to the drawings. As shown in Figures 1 to 8, the fixing support jig 10 fixes and supports the inner tube X1 and outer tube X2, which are fitted together, in the longitudinal direction of the tubes. It is generally composed of a tubular base portion 12 that is attached and fixed to the outer circumferential surface of one end of the outer tube X2, a pressing body 14 interposed between the inner tube X1 and the outer tube X2 and having a pressing end surface 20 that can be pressed against the outer circumferential surface 13 of the inner tube X1, and a tightening screw portion 16 that can press and fix the pressing body 14 toward the outer circumferential surface 13 of the inner tube X1. The length, thickness, and cross-sectional shape of the inner tube X1 and outer tube X2 are selected according to the application, and as will be explained later, the fitting length between the inner tube X1 and outer tube X2 is adjusted, thereby adjusting the overall length of the inner tube X1 and outer tube X2.

[0013] For example, the inner tube X1 and the outer tube X2 are both hollow cylindrical in shape, and the outer tube X2 is fitted onto the inner tube X1 by inserting the inner circumferential surface 17 of the outer tube X2 into the outer circumferential surface 13 of the inner tube X1 through an opening at one end. From the standpoint of fitting the outer tube X2 onto the inner tube X1, the outer tube X2 needs to be hollow, but it does not necessarily need to have a circular cross-section. On the other hand, the inner tube X1 does not need to be hollow; for example, it may be solid from the standpoint of ensuring strength. When the inner peripheral surface 19 of the outer tube X2 is fitted inside the inner tube X1, a slight clearance may be provided between the inner peripheral surface 19 of the outer tube X2 and the outer peripheral surface 13 of the inner tube X1 as long as the outer tube X2 is fixedly held in the longitudinal direction with respect to the inner tube X1 through the pressing body 14 by the fastening screw portion 16 as will be described later. The slight clearance is, for example, 0.05 mm to 0.1 mm. On the outer peripheral surface 21 of the tubular base portion 12, a pair of through slits 32 are provided at an interval D from each other, and a female screw portion 34 is provided between the pair of through slits 32. The interval D between the pair of through slits 32 may be selected according to the use of the fixing support jig 10 as will be described later. Regarding the tubular base portion 12 attached and fixed to one end portion of the outer tube X2, a pair of through slits 32 spaced from each other and a female screw portion 34 provided between the pair of through slits 32 are provided on the outer peripheral surface 21 of the tubular base portion 12.

[0014] More specifically, the tubular base portion 12 is a hollow cylindrical shape with one end being externally fitted to one end portion 28 of the outer tube X2, and the inner tube X1 is inserted into the outer peripheral surface 21 of the tubular base portion 12 with a predetermined clearance at the other end. The tubular base portion 12 is preferably made of metal and is a hollow cylindrical shape. The diameter of the inner peripheral surface is set to be at least larger than the inner diameters of the inner tube X1 and the outer tube X2, but the outer shape does not necessarily have to be cylindrical, and for example, it may be a spindle shape with a diameter-expanded central portion. The thickness and the length in the longitudinal direction of the tube may be appropriately set as long as it is possible to fixedly support the inner tube X1 and the outer tube X2 that fit together in the longitudinal direction of the tube. For example, they are several millimeters or several centimeters.

[0015] The tubular base portion 12 is composed of a first externally fitted portion that extends from one end toward the outer tube X2 side and whose inner peripheral surface faces the outer peripheral surface of the outer tube X2 with a first predetermined clearance, and a second externally fitted portion that extends from one end toward the inner tube X1 side and whose inner peripheral surface faces the outer peripheral surface of the inner tube X1 with a second predetermined clearance. One of the pair of through-hole slits 32 is provided in the first externally fitted portion, and the other of the pair of through-hole slits 32 is provided in the second externally fitted portion. The diameter of the second externally fitted portion is set smaller than the diameter of the first externally fitted portion. The second externally fitted portion constitutes a reduced-diameter portion, and the first externally fitted portion constitutes an enlarged-diameter portion. An annular shoulder portion 17 is formed at the connecting portion between the first externally fitted portion and the second externally fitted portion, and the annular shoulder portion 17 can be placed on the annular end surface EN of the outer tube X2. The clearance between the inner peripheral surface of the tubular base portion 12 and the outer peripheral surface 13 of the inner tube X1, the clearance between the inner peripheral surface of the tubular base portion 12 and the outer peripheral surface 15 of the outer tube X2, and the clearance between the inner tube X1 and the outer tube X2 may be determined from an appropriate perspective for use as, for example, a music stand. For example, they are all 0.5 mm to 1 mm.

[0016] The pair of through slits 32 are provided so as to extend in the longitudinal direction of the inner and outer tubes X1 and X2, respectively, with a predetermined interval therebetween in the longitudinal direction of the inner and outer tubes X1 and X2. More specifically, each of the pair of through slits 32 is an elongated opening, and the width of the opening only needs to allow the pressing body 14 to penetrate in the thickness direction. As will be described later, since the pressing body is fastened and fixed to the outer tube X2 via the fastening screw portion 16, the pressing body 14 does not need to penetrate the pair of through slits 32 provided on the outer peripheral surface 16 of the outer tube X2 in an interference fit manner, and a clearance is allowed between the peripheral edge of the through slit 32 and the outer peripheral edge of the pressing body 14, particularly the leg portion 18 (described later).

[0017] The pressing body 14 is positioned on the outer peripheral surface 21 of the tubular sleeve portion 12 and penetrates the pair of through-hole slits 32 so as to contact the outer peripheral surface 13 of the inner tube X1 and the outer peripheral surface 15 of the outer tube X2. More specifically, the male threaded portion 26 of the tightening screw portion 16 constitutes a pressing body 14 with a roughly U-shaped cross-section, comprising a clearance hole portion 24 that penetrates in the thickness direction and two leg portions 18 that extend in opposite directions from the clearance hole portion 24. The pressing body 14 has a projection 25 on its upper surface 22, and the projection 25 is provided with a clearance hole 24. By screwing the male threaded portion 26 into the female threaded portion 34, the lower surface 38 of the shank portion and the upper surface of the projection 42 of the pressing body 14 come into contact, thereby pressing and fixing the fastening threaded portion 16 and the pressing body 14 together to the inner pipe X1 and outer pipe X2 in a screw-in manner. The upper surface of the projection 42 functions as a pressing load receiving portion having a pressing load receiving surface. The pressing end faces 20, which are the tip surfaces of each of the pair of legs 18 spaced apart in the elongation direction of the pressing load receiving portion, are shaped to conform to the outer circumferential surfaces 13 of the inner tube X1 and 15 of the outer tube X2 so that they can make surface contact with the outer circumferential surfaces 13 of the inner tube X1 and 15 of the outer tube X2. For example, if the outer circumferential surface 13 of the inner tube X1 is the outer surface of a cylinder, the pressing end face 20 will have a cross-section that is an arc shape with respect to that diameter. In this case, unlike the tightening screw portion 16, the pressing body 14 itself does not need to rotate toward the outer circumferential surface 13 of the inner tube X1 and 15 of the outer tube X2, so the pressing end face 20 can be pressed against the outer circumferential surfaces 13 of the inner tube X1 and 15 of the outer tube X2 with its arc-shaped cross-section facing toward the outer circumferential surfaces 15 of the inner tube X1 and 15 of the outer tube X2. Furthermore, each pressing end face 20 does not need to be in close contact with the outer circumferential surface 13 of the inner tube X1 or the outer circumferential surface 15 of the outer tube X2.

[0018] The tightening screw portion 16 is configured to press and fix the pressing body 14 toward the outer circumferential surface 13 of the inner tube X1. The tightening screw portion 16 has a shank portion 36 and a male screw portion 26 extending downward from the lower surface 38 of the shank portion 36. The male screw portion 26 can be screwed into the female screw portion 34, and an annular surface 40 surrounding the male screw portion 26 is formed on the lower surface 38. After adjusting the fitting position of the inner tube X1 with respect to the outer tube X2, the tightening screw portion 16 is used to screw the male screw portion 26 into the female screw portion 34, while the pressing body 14 is passed through the pair of through slits 32 and pressed against the outer surface 13 of the inner tube X1 for fixation. The tightening screw portion 16 has a head portion 28 at the end opposite the male screw portion end of the shank portion 36, which can be gripped and rotated with the fingers. The diameter of the head portion 28 is preferably larger to allow it to be gripped and rotated with little force using the fingers, and from the viewpoint of preventing slippage, multiple shallow grooves spaced apart in the circumferential direction may be provided.

[0019] Regarding the use of the fixed support jig 10, the pair of through slits 32 are provided so as to extend in the circumferential direction of the inner and outer tubes X1 and X2, respectively, separated by a predetermined distance in the longitudinal direction of the inner and outer tubes X1 and X2, the inner and outer tubes X1 and X2 are oriented in the vertical direction, and a heavy object is supported at a predetermined height by either the inner or outer tube X1 or X2. In particular, when using a fixed support jig 10 to fix and hold a heavy object at a predetermined height by adjusting the fitting length of the inner and outer tubes X1 and X2 that extend in the vertical direction, it is preferable that the resistance force between the pressing surface of the pressing body 14 and the outer circumferential surface 13 of the inner tube X1, i.e., the tightening force by the fastening screw portion 16, is large, from the viewpoint of supporting the weight of the heavy object by the frictional force between the pressing surface of the pressing body 14 and the outer circumferential surface 13 of the inner tube X1. For this reason, strength to withstand a large tightening force is required, so it is preferable that the pressing body 14, the fastening screw portion 16, and the inner and outer tubes X1 and X2 that constitute the fixed support jig 10 are made of metal.

[0020] As a variation, the fixed support jig 10 may be made of resin from the viewpoint of lightness, and in particular, even if a pair of slits and female screw openings 34 are provided, it is preferable to ensure sufficient thickness from the viewpoint of ensuring strength around them. In this case, the pair of through slits 32 are preferably provided so as to extend in the circumferential direction of the inner and outer pipes X1 and X2, with a predetermined distance between them in the circumferential direction of the inner and outer pipes X1 and X2.

[0021] The following describes a method for adjusting the lengths of existing inner and outer tubes X1 and X2 that fit together, in particular. The step of fitting a tubular base portion 12 with a circular cross-section on its inner surface onto the upper end of the outer tube X2, The steps include: fitting the inner tube X1 into the tubular base portion 12 or the outer tube X2; The process involves rotating the tubular base portion 12 around the longitudinal direction of the outer tube X2 to a desired rotational position, The method includes the step of fixing the tubular base portion 12 to a desired rotational position around the longitudinal direction of the outer tube X2 by pressing the tubular base portion 12 from the outside toward the outer surface of the inner tube X1 in the thickness direction of the tubular base portion 12, while simultaneously pressing the outer surface of the inner tube X1 on the opposite side toward the inner surface of the tubular base portion 12 or the inner surface of the outer tube X2 to fix and hold the inner and outer tubes X1 and X2 together in the longitudinal direction.

[0022] Furthermore, it is preferable to have a step of fixing the tubular base portion 12 to a desired rotational position around the longitudinal direction of the outer tube X2 by pressing the tubular base portion 12 from the outside toward the outer surface of the outer tube X2 in the thickness direction of the tubular base portion 12, while pressing the outer surface on the opposite side of the outer tube X2 toward the inner surface of the tubular base portion 12 to fix and hold the inner and outer tubes X1 and X2 together in the longitudinal direction. Furthermore, the inner circumferential surface of the tubular base portion 12 is provided with a reduced diameter portion set to be larger than the diameter of the inner tube X1 and an expanded diameter portion set to be larger than the diameter of the outer tube X2. An annular shoulder portion 17 is formed at the connection between the reduced diameter portion and the expanded diameter portion, and it is preferable to place the annular shoulder portion 17 on the annular upper end surface EN of the outer tube X2 and rotate the tubular base portion 12 around the longitudinal direction of the outer tube X2 to a desired rotational position.

[0023] The following describes the application of a fixed support jig 10 to an existing music stand 100, using a music stand as an example. As shown in Figure 11, in existing music stand stands, the inner and outer tubes are fitted together, with the music stand connected to the upper end of the inner tube X1, while the tripod 106 is connected to the lower end of the outer tube X2 to hold the music stand upright. The fitting between the lower end of the inner tube X1 and the upper end of the outer tube X2 is, for example, screwed in in a height-adjustable manner, with the screw passing horizontally through a through hole in the outer tube X2, and the tip of the screw contacting the outer surface of the inner tube X1 to hold it in place.

[0024] First, the screws are released and removed. Then, the fitting position between the lower end of the inner tube X1 and the upper end of the outer tube X2 is adjusted according to the desired height of the music stand F. At that position, the inner tube X1 is supported with one hand, and the tubular base portion 12 of the fixing support jig 10 is fitted onto the upper end of the outer tube X2 through one opening with the other hand, and the annular shoulder portion 17 of the tubular base portion 12 is placed on the upper circumference of the outer tube X2. The tubular base portion 12 is positioned to overlap the upper end of the outer tube X2, and a predetermined clearance is ensured between the inner surface of the tubular base portion 12, the outer surface of the outer tube X2, and the outer surface of the inner tube X1. The tubular base portion 12 is supported at the upper end of the outer tube X2 and is free to rotate around the longitudinal direction of the inner and outer tubes. Next, with the other hand, rotate the tubular base portion 12 around the longitudinal direction of the inner and outer tubes to position it in the desired rotation position, for example, in the case of a right-handed person, to a position where the fastening screw 16 can be fastened with the right hand.

[0025] Next, while supporting the inner tube X1 with one hand, the fastening screw 16 is tightened with the other hand, locking the rotation of the inner and outer tubes X2 of the tubular base 12 around the longitudinal direction, and fixing the inner and outer tubes X2 to each other, and setting it to the desired height on the music stand F. More specifically, the tightening screw portion penetrates the clearance hole of the load-bearing portion, and the male screw portion is screwed into the female screw portion. One of the pair of pressing bodies penetrates the through hole of the first outer fitting portion, and the corresponding pressing end face makes surface contact with the outer circumferential surface of the inner tube X1. The outer circumferential surface of the inner tube X1 on the opposite side of the surface contact portion of the pressing end face is pressed and fixed against the inner circumferential surface of the outer tube X2 at the fitting portion of the inner and outer tubes X2. The other of the pair of pressing bodies penetrates the through hole of the second outer fitting portion, and the corresponding pressing end face makes surface contact with the outer circumferential surface of the outer tube X2, thereby pressing and fixing. This allows the tubular base portion 12, which is attached to the outer surface of one end of the outer tube X2, to rotate freely around the longitudinal direction of the inner and outer tubes X1 and X2 until it is screwed in by the fastening screw portion 16. Screwing in by the fastening screw portion 16 fixes the rotation of the tubular base portion 12 and also enables the inner and outer tubes X1 and X2 to be fixedly held together in the longitudinal direction of the inner and outer tubes X1 and X2. Applying such a fixing support jig to a music stand makes it possible to improve usability when adjusting the stand height with a simple structure. For example, in the case of a big band where multiple instruments are played in front of an audience, the music stands F-stands placed in front of each instrument player are not foldable, lightweight music stands F-stands, but rather heavy music stands F-stands with a thicker pipe diameter. By setting up a number of these substantial music stands in a aligned, rotating position, it becomes easy to create a unified and visually appealing appearance. To change the height of the music stand F, simply loosen the fastening screw 16, adjust the fitting position of the inner tube X1 with respect to the outer tube X2, and then fasten it again. In particular, when lowering the height of the music stand F, you only need to loosen the fastening screw 16 with one hand and quickly fasten it, as the inner tube X1 will fall under its own weight, eliminating the need to support the inner tube X1 with the other hand. Furthermore, if existing screws can also be used in the fixing support fixture, they may be used as is without preparing new screws.

[0026] As described above, by adjusting the internal fitting length of the inner tube X2 to the outer tube X1 according to the desired height, and then placing the annular shoulder portion 17 formed at the boundary between the inner reduced diameter side and the inner expanded diameter side of the tubular base portion 12 on the annular circumferential surface 21 at one end of the outer tube X1, the tubular base portion 12 is free to rotate around the longitudinal direction of the inner and outer tubes X1. Therefore, while holding the inner tube X2 with one hand, the tubular base portion 12 can be easily rotated to the desired rotation position with the other hand.

[0027] Next, by screwing the fastening screw 16 into the tubular base portion 12, one pressing end face 20 of the U-shaped pressing body 14 contacts the outer circumferential surface 13 of the inner tube X2, and the outer circumferential surface 13 of the inner tube X2 on the opposite side in the diametrical direction is pressed against the inner circumferential surface of the inner diameter-reducing side portion 17 of the tubular base portion 12. At the same time, the other pressing end face 20 of the U-shaped pressing body 14 contacts the outer circumferential surface 13 of the inner tube X2, and the outer circumferential surface 13 of the inner tube X2 on the opposite side in the diametrical direction is pressed against the inner circumferential surface of the inner diameter-expanding side portion 19 of the tubular base portion 12. As a result, the inner tube X2 and the outer tube X1 are fixedly held in place with respect to the tubular base portion 12, so that even if there is a clearance at the fitting portion of the inner and outer tubes X1, they are fixedly held in place with respect to each other in the longitudinal direction of the tubes, and the rotation of the tubular base portion 12 around the longitudinal direction of the inner and outer tubes X1 is fixed. For this reason, the difference between the length L1 of one pressing end face 20 corresponding to the inner tube X2 from the pressing load receiving surface 22 and the length L2 of the other pressing end face 20 corresponding to the outer tube X1 from the pressing load receiving surface 22 is determined by the thickness t1 of the outer tube X1 and the clearance between the outer circumferential surface 13 of the inner tube X2 and the inner circumferential surface 23 of the outer tube X1, and is set to be at least greater than the thickness t1 of the outer tube X1, and the width w of the annular shoulder portion 17 is set to be at least greater than the thickness t1 of the outer tube X1.

[0028] By setting the width of the annular shoulder portion 17 formed at the boundary between the inner reduced-diameter side and the inner expanded-diameter side of the tubular base portion 12 to be larger, and by preparing multiple types of U-shaped pressing bodies 14 with different lengths of L1 and L2, it is possible to apply a general-purpose tubular base portion 12 to an existing music stand with an inner and outer tube X1, and by selecting the type of U-shaped pressing body 14, it is possible to add only the fixing and holding jig having the tubular base portion 12, U-shaped pressing body 14, and fastening screws 16, rather than replacing the entire music stand. In addition, by selecting the type of U-shaped pressing body 14, it is preferable that one pressing end face 20 and the other pressing end face 20 simultaneously contact the outer circumferential surfaces of the inner tube X2 and the outer tube X1. However, even if they do not contact simultaneously, the slight inclination of the pressing load receiving surface 22 of the U-shaped pressing body 14 allows for the fixing and holding of the inner and outer tubes X1 and the rotational fixing of the tubular base portion 12.

[0029] On the other hand, by precisely setting the width of the annular shoulder portion 17 of the tubular base portion 12 compared to the existing inner and outer tubes X1 and X2, and creating a custom-made tubular base portion 12 with no clearance at the fitting portion of the inner and outer tubes X1 and X2, the fastening screw portion 16 not only presses the U-shaped pressing body 14 against the inner surface of the tubular base portion 12 to press the inner and outer tubes X1 and X2 against the inner surface of the tubular base portion 12, but also, at the fitting portion of the inner and outer tubes X1 and X2, the outer surface 13 of the inner tube X2 is pressed against the inner surface of the outer tube X1 in a line contact manner on the diametrically opposite side of the pressing end face 20 of the U-shaped pressing body 14, so that the inner tube X2 and outer tube X1 can be more firmly fixed and held together in the longitudinal direction of the tubes, which is effective for stands that support heavy objects such as music amplifiers and large musical instruments. By screwing in the fastening screw, the inner and outer pipes are fixed and held together via the tubular base portion 12. After fixing the rotation of the tubular base portion 12 around the longitudinal direction of the inner and outer pipes, the grub screw 38 is screwed in from one end of the tubular base portion 12 until it reaches the opening of one leg portion 18 of the U-shaped pressing body 14. This completely detaches the male threaded portion of the fastening screw from the female threaded portion of the pipe sleeve. Even if the U-shaped pressing body 14 becomes free, the grub screw 38 prevents the U-shaped pressing body 14 from falling off the tubular base portion 12. In the case of medical stands for IV drips, monitors, lighting, etc., casters are usually provided at the bottom of the inner and outer tubes, and they are moved to numerous treatment sites. During this process, the stand vibrates up and down due to unevenness in the floor surface, so there is a high need to firmly fix the fitting and fixing part of the inner and outer tubes. Furthermore, there is a high need to adjust the direction of the IV drip, monitor, and lighting during treatment. For these reasons, the fixed support jig of the present invention is more effective than music stands, which are usually transported to performance venues and for which there is little need to adjust the height and direction of music stands, microphones, amplifiers, etc. during performances.

[0030] As a modified example, as shown in Figure 18, the inner and outer tubes X1 and X2 can be fixed and held even when the inner tube X1 is detached from the outer tube X2. More specifically, the pressing end face 20 of one leg 18 of the pressing body 14 is pressed against the outer circumferential surface 13 of the inner tube X1, and the pressing end face 20 of the other leg 18 is pressed against the outer circumferential surface of the outer tube X2. Since it is not necessary to directly fix and hold the inner and outer tubes X2 through the fitting portion of the inner and outer tubes X2, and it is sufficient to indirectly fix and hold the inner and outer tubes X1 and X2 via the tubular base portion 12, it is possible to fix and hold the inner and outer tubes X1 and X2 even when there is no fitting portion of the inner and outer tubes X2, in other words, when the overall length of the inner and outer tubes X1 and X2 is long.

[0031] According to the fixed support jig 10 having the above configuration, in the inner tube and outer tube which both extend in the vertical direction and fit together, a tubular base portion having a pair of through holes on its outer surface with a female screw portion in between is attached to the outer surface of one end of the outer tube, and in the pressing body 14 which has a roughly U-shaped vertical cross-section, one leg portion passes through one of the through holes provided in the first outer fitting portion which extends from one end of the outer tube toward the outer tube and whose inner surface is fitted onto the inner tube which faces the outer surface of the inner tube with a first predetermined clearance, and the other One leg extends from one end of the outer tube toward the inner tube, and its inner circumferential surface is fitted onto the outer tube with a second predetermined clearance from the outer circumferential surface of the outer tube. The other through hole is provided in the second outer fitting part, and the male thread of the fastening screw part is screwed into the female thread part, thereby allowing the pair of pressing bodies to be pressed against the load-receiving parts. When supporting a heavy object with either the inner or outer tube, the fitting position of the inner tube relative to the outer tube is adjusted according to the predetermined height of the heavy object, and the load-receiving part is fastened by the tightening screw part. The male threaded portion is threaded through the hole in the outer fitting portion, and the female threaded portion is screwed into the female threaded portion. One of the pair of legs is threaded through the through hole in the first outer fitting portion, and the corresponding pressing end face is brought into surface contact with the outer surface of the inner tube. The outer surface of the inner tube on the opposite side of the surface contact portion of the pressing end face to the inner surface of the outer tube or tubular base portion is pressed and fixed. The other of the pair of legs is threaded through the through hole in the second outer fitting portion, and the corresponding pressing end face is brought into surface contact with the outer surface of the outer tube, thereby pressing and fixing. Until the fastening screw portion is tightened, the tubular base portion attached to the outer surface of one end of the outer tube is free to rotate around the longitudinal direction of the inner and outer tubes. The tightening screw portion fixes the rotation of the tubular base portion and allows for the fixing and holding of the inner and outer tubes in the longitudinal direction of the inner and outer tubes. Applying such a fixing support jig to a music stand or medical stand improves usability when adjusting the stand height due to its simple structure.

[0032] A second embodiment of the present invention will be described below. In the following description, components similar to those in the first embodiment will be given the same reference numerals and their descriptions will be omitted. The characteristic features of this embodiment will be described in detail below with reference to Figures 9 and 10. A feature of the second embodiment of the present invention is that, when a male threaded portion is provided near the upper end of the outer tube X2, one of the pressing end faces of the U-shaped pressing body is given a surface shape that makes close contact with the male threaded portion. More specifically, when male threads are provided spirally at a predetermined pitch near the upper end of the outer tube X2, female threads with a shape complementary to this spiral predetermined pitch are provided on one of the pressing end faces of the U-shaped pressing body. This makes it possible to reliably prevent the tubular sleeve portion 12 from coming out upward from the outer tube X2 via one of the pressing end faces of the U-shaped pressing body. In particular, if the outer tube X2 of an existing music stand has male threads, more specifically, in order to fix and hold the inner and outer tubes X1 and X2 together, instead of screwing them in from the side as described above, a sleeve having a female thread that can be screwed onto the male thread on the outer surface of the outer tube X2 is screwed into the inner and outer tubes X1 and X2 in the longitudinal direction, thereby tightening and fixing it from the entire inner surface of the outer tube X2 to the entire outer surface of the inner tube X1, a tubular base portion 12 having a female thread that can be screwed onto the male thread in a predetermined range on its inner surface may be prepared. In this case, instead of placing the annular shoulder portion 17 of the tubular base portion 12 of the fixing support jig on the upper end of the outer tube X2 as described above, the female thread of the tubular base portion 12 may be screwed onto the male thread of the outer tube X2, and the tubular base portion 12 may be allowed to rotate freely around the longitudinal direction of the inner and outer tubes X1 and X2.

[0033] A third embodiment of the present invention will be described below. In the following description, components similar to those in the first embodiment will be given the same reference numerals and their descriptions will be omitted. The characteristic features of this embodiment will be described in detail below with reference to Figures 16 and 17. This embodiment is similar to the first embodiment in that the tubular base portion 12 is rotatably held on the annular end face EN of the outer tube X2, and the inner and outer tubes X1 and X2 are fixedly held together by fastening screws pressing the pressing end face 20 against the outer circumferential surface 13 of the inner tube X1 through the through-slit of the tubular base portion 12. However, while the first embodiment uses the pressing end faces 20 of each of the legs 18 of a single U-shaped pressing body 14, this embodiment is characterized by employing an L-shaped pressing body 14.

[0034] More specifically, as shown in Figure 17, the L-shaped pressing body 14 has only one leg portion 18 that can pass through the through-slit of the tubular base portion 12, while the other leg portion 18 in the first embodiment does not have a through-slit of the tubular base portion 12 and is a contact portion 60 with a contact surface 62 at its end that contacts the outer circumferential surface 21 of the tubular base portion 12. The length of the contact portion 60 is set so that the pressing end surface 20 of one leg portion 18 can be pressed against the outer circumferential surface 13 of the inner tube X1. The width w of the annular shoulder portion 17 is set to the thickness of the outer tube X2, and the tubular base portion 12 is rotatable around the longitudinal direction of the inner and outer tubes X1 and X2 with the annular shoulder portion 17 placed on the annular end face EN of the outer tube X2. Furthermore, by tightening the fastening screw 16, the pressing end face 20 of one leg portion 18 is pressed against the outer circumferential surface 13 of the inner tube X1, and on the opposite side of the pressing end face 20 of the leg portion 18, the outer circumferential surface 13 of the inner tube X1 is pressed against the inner circumferential surface of the tubular base portion 12. In addition, at the fitting portion of the inner and outer tubes X1 and X2, the outer circumferential surface 13 of the inner tube X1 on the opposite side is pressed against the inner circumferential surface of the outer tube X2, thereby enabling the inner and outer tubes X1 and X2 to be fixedly held together. For example, when using it as a music stand such as a music stand or microphone stand, and adjusting the height of the music stand or microphone, this embodiment can be effectively applied when adjusting the length of the fitting portion between the inner and outer tubes X1 and X2 within the range in which the inner and outer tubes X1 and X2 are fitted together. Furthermore, if the upper surface 22 of the L-shaped pressing body 14 is pressed parallel to the outer surface 21 of the tubular base portion 12 toward the outer surface 13 of the inner tube X1 by the fastening screw portion 16, the contact portion 60 may be omitted, and the L-shaped pressing body 14 may be in a complete form without the other leg portion 18.

[0035] As a modified example, as shown in Figure 16, two L-shaped pressing bodies 14 may be stacked and used as an alternative to a single U-shaped pressing body 14. More specifically, each L-shaped pressing body 14 has a horizontal portion parallel to the longitudinal direction of the inner and outer tubes X1 and X2, and an orthogonal portion perpendicular to it. The horizontal portion is provided with a clearance hole, the orthogonal portion forms a leg portion 18, and a pressing end face 20 is provided at the tip. The two L-shaped pressing bodies 14 are arranged with their horizontal sections stacked on top of each other, such that the horizontal section of one extends toward the perpendicular section of the other. Therefore, the length l of the horizontal section is set to contact the inner surface of the perpendicular section of the other. Unlike the first embodiment, the two L-shaped pressing bodies 14 move and adjust independently within their corresponding through-slits, but they can be separated by attaching and detaching the fastening screws. Therefore, each L-shaped pressing body 14 is provided with a grub screw and a corresponding through-hole.

[0036] As a result, the male threaded portion of the fastening screw passes through the clearance holes of the upper L-shaped pressing body 14 and the lower L-shaped pressing body 14, and is tightened to the female threaded portion of the tubular base portion 12. This causes the pressing end face 20 of the upper L-shaped pressing body 14 to be pressed against the outer surface of the outer tube X2, and the pressing end face 20 of the lower L-shaped pressing body 14 to be pressed against the outer surface 13 of the inner tube X1. Thus, the inner and outer tubes X1 and X2 can be fixedly held together in the same manner as in the first embodiment.

[0037] For example, in the first embodiment, the inner and outer tubes X1 and X2 are both circular with a constant cross-section, and the tubular base portion 12 is placed on the annular end face EN of the outer tube X2. The tubular base portion 12 is rotated to a desired angle position around the longitudinal direction of the tube, and the rotation of the tubular base portion 12 is fixed by the fastening screw portion 16 or the pressing lever 301 via the U-shaped or L-shaped pressing body 14, while the inner and outer tubes X1 and X2 are fixed and held together. However, the invention is not limited to this, and for example, the inner tube X1 has a constant circular cross-section. If the outer tube X2 has a rectangular, for example, square cross-section into which the inner tube X1 can be fitted, the tubular base portion 12 can be held in one hand and, without placing it on the annular end face EN of the outer tube X2, the tubular base portion 12, which is concentric with the inner tube X1, can be rotated to a desired angle around the longitudinal direction of the tube while floating on the upper, circular cross-section side of the inner tube X1, and the rotation of the tubular base portion 12 can be fixed in place by the fastening screw portion 16 or the pressing lever 301, either at that height or on the annular end face EN of the outer tube X2, thereby fixing the rotation of the tubular base portion 12 and securing the inner and outer tubes X1 and X2 to each other.

[0038] A fourth embodiment of the present invention will be described below. In the following description, components similar to those in the first embodiment will be given the same reference numerals and their descriptions will be omitted. The characteristic parts of this embodiment will be described in detail below with reference to Figures 12 to 15. The fourth embodiment of the present invention is similar to the first embodiment in that it uses a U-shaped pressing body to fix and hold the inner and outer tubes together, but unlike the first embodiment, it is characterized by employing a pressing lever mechanism 300 as a substitute for the fastening screw portion. Specifically, the annular circumferential surface 308 of the rotating portion is curved in such a way that the radius from the axis changes from a first radius to a second radius as it expands. By rotating the pressing lever 301, a pair of pressing bodies 34 can move in the thickness direction of the slit within the corresponding through slit 62. By rotating the lever of the pressing lever 301 around an axis provided at a predetermined height from the outer circumferential surface 14 of the annular sleeve 12, the pressing bodies 34 begin pressing toward the outer circumferential surfaces 14 of the inner and outer pipes X1 and X2 at a rotation position corresponding to an intermediate radius between the first and second radii, and end the pressing toward the outer circumferential surfaces 14 of the inner and outer pipes X1 and X2 at a rotation position corresponding to the second radius, bringing the pressing end face into surface contact with the outer circumferential surfaces 14 of the inner and outer pipes X1 and X2, and pressing and fixing the outer circumferential surfaces 14 of the inner and outer pipes X1 and X2 on the opposite side of the surface contact portion of the pressing end face toward the inner and outer pipes X1 and X2 to the inner circumferential surface of the tubular base portion 12.

[0039] The pressing lever mechanism 300 includes a pressing lever 301 that presses the pressing body 14 against the outer circumferential surfaces 14 of the inner and outer tubes X1 and X2, a pivot 302 extending parallel to the tubular base portion 12 that allows 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 302 at a predetermined height from the outer circumferential surface of the tubular base portion 12 (tubular base portion). The press lever 301 is a one-piece structure with a roughly tadpole-shaped cross-section, and has a grip lever portion 303 for gripping with the fingers and a rotating portion 308 that rotates integrally with the grip lever portion 303 around a pivot 302, with the pivot 302 located in the center of the rotating portion 308. More specifically, the rotating portion 308 is provided with a notch 310, separating it into opposing rotating parts, a pin 304 is positioned within the notch 310, and the pivot 302, which passes through the pin 304, also passes through circular cross-sectional holes provided in each rotating part, allowing each rotating part, i.e., the press lever 301, to rotate around the pivot 302 between a non-pressing circumferential position and a pressing circumferential position. The press lever 301 may be made of resin from the viewpoint of lightness. The length of the arm of the grip lever portion 303 from the center O of the pivot 302 should be determined so that the push lever 301 can be sufficiently pressed down by hand force, according to the principle of leverage. Each rotating part has a curved circumferential surface 312, and while the pressing lever 301 rotates around the pivot 302 between a non-pressing circumferential position and a pressing circumferential position, one of the parts of the curved circumferential surface 312 is in contact with and held against the upper surface 33 of the pressing body 14, thereby causing the pressing body 14 to move in the thickness direction of the tubular base portion 12 within the through slit 62 as the pressing lever 301 rotates.

[0040] The pin 304 is fixed upright with its lower end screwed to the outer surface 21 of the tubular base portion 12, and has a through hole (not shown) through which the pivot 302 can pass. With the above configuration, by adjusting the amount the pin 304 is screwed into the tubular base portion 12, the height of the pivot 302 relative to the outer circumferential surface 21 of the tubular base portion 12 is adjusted, and then by rotating the pressing lever 301 around the pivot 302 from the non-pressing circumferential position to the pressing circumferential position, the pressing body 14 is pressed against the outer circumferential surfaces 14 of the inner and outer tubes X1 and X2 via the curved circumferential surface 312 of the rotating portion 308. Compared to the first to eleventh embodiments, which use screw-in type rotation by the fastening screw portion 16, it is possible to fix and hold both inner and outer tubes X1 and X2 while maintaining the pressing circumferential position of the pressing lever 301 by pushing it down with a single touch from the non-pressing circumferential position to the pressing circumferential position, and conversely, relative movement of both inner and outer tubes X1 and X2 in the longitudinal direction of the tubes is possible by pushing up the pressing lever 301 with a single touch from the pressing circumferential position to the non-pressing circumferential position.

[0041] As a variation, the pin 304 and the pivot 302 may be integrated into a single structure. That is, without providing a through hole for the pivot 302 in the pin 304, the pivot 302 may be provided separately on the outer surface of the pin 304, extending in opposite directions from positions opposite each other in the diametrical direction. If the height of the pivot 302 from the outer surface 21 of the tubular base portion 12 does not require adjustment, the pin 304 may be fixed in place without a rotatable threaded portion at its lower end.

[0042] In this embodiment, a male screw portion 335 extending upward over a predetermined height is provided on the upper surface of the U-shaped pressing body 14, and in the ring plate 314 having an opening in the center, a female screw portion 337 that can be screwed into the male screw portion 335 is provided on the inner circumferential surface of the opening. More specifically, the ring plate 314 has an annular upper surface 315 and an annular lower surface 316, and a female screw portion 337 is provided across the distance between the annular upper surface 315 and the annular lower surface 316, i.e., across the entire thickness of the ring plate 314. The thickness of the ring plate 314 is set to be shorter than the length of the male screw portion 335, and the diameter of the ring plate 314 must be set so that the curved circumferential surfaces 312 of both rotating portions are in contact with and held by the annular upper surface 315 of the ring plate 314. From this, by adjusting the amount that the female thread portion 337 of the ring plate 314 is screwed into the male thread portion 335 of the U-shaped pressing body 14, the height of the annular upper surface 315 of the ring plate 314, which is in contact with and holds the curved circumferential surface 312, from the outer circumferential surface 21 of the tubular base portion 12 is adjusted. By rotating the pressing lever around the pivot 302, the amount that the pair of pressing end faces of the U-shaped pressing body 14 protrude inward from the inner circumferential surface of the tubular sleeve 12 toward the outer circumferential surface of the inner tube X1 is adjusted, thereby allowing the pressing force against the outer circumferential surface of the inner tube X1 to be adjusted. The hollow sleeve 333 is fitted and fixed to the outer surface 21 of the tubular base portion 12, with the pin 304 passing through the hollow portion, while the clearance hole of the U-shaped pressing body and the opening of the ring plate pass through the outer surface of the hollow sleeve 333. The cross-sectional shape of the hollow sleeve 333 is non-circular, and its height from the outer surface 21 of the tubular base portion 12 is set to approximately 310. This prevents the pressing lever 301 from rotating around the pin 304, as it will hit the non-circular upper end of the hollow sleeve 333. The tubular base portion 12 can be manufactured by machining, 3D printing, or lost-wax casting. In the case of 3D printing or lost-wax casting, the hollow sleeve 333 and the tubular base portion 12 can be manufactured as a single unit without fitting and fixing the hollow sleeve 333 to the outer surface 21 of the tubular base portion 12.

[0043] For example, the amount of threading may be adjusted according to the clearance between the inner surface of the sleeve and the outer surface of the inner tube, or the amount of threading may be adjusted to increase the pressing force at the same clearance. From this perspective, it is best to set the screw-in range, that is, the length of the male threaded portion of the U-shaped presser foot. As described above, when rotating the pressing lever around the pivot 302 to the circumferential position at the end of pressing (Figure 15), it is possible to adjust in advance the amount that the female thread portion of the ring plate 314 is screwed into the male thread portion of the U-shaped pressing body so that the pressing lever can be rotated by hand. Furthermore, when rotating the pressing lever around the pivot 302 to the circumferential position at the end of pressing, it is also possible to adjust the pressing force itself within the range in which the pressing lever can be rotated by hand.

[0044] As shown in Figure 15, the curved circumferential surface 312 is set such that, at the non-pressing circumferential position, the distance between the center O of the pivot 302 and the lower end of the curved circumferential surface 312 is R1, at the pressing start circumferential position, the distance between the center O of the pivot 302 and the lower end of the curved circumferential surface 312 is R2, and at the pressing end circumferential position, the distance between the center O of the pivot 302 and the lower end of the curved circumferential surface 312 is R3, with R1 > R2 > R3. As a result, the difference between R2 and R3 causes the pressing body 14 to be pressed against the outer circumferential surfaces 14 of the inner and outer tubes X1 and X2. The difference between R2 and R3 should be set so that the pressing force of the pressing body 14 is sufficient to fix and hold both inner and outer tubes X1 and X2 in place. For example, if the thickness of the tubular base portion 12 is several millimeters, the difference between R2 and R3 is about one-twentieth to one-tenth of that thickness. The curved circumferential surface 312 is set to smoothly progress from R1 to R3, and in order to fix the pressing lever 301 in the pressing circumferential position, it is preferable to set it so that from the curved circumferential surface portion corresponding to the pressing start circumferential position of the pressing lever 301, a circular arc portion is formed with a central angle range of, for example, 90 degrees and a constant R3 with respect to the center O of the pivot 302, and then it gradually decreases from there. The entire curved circumferential surface 312 may be composed of a combination of multiple circular arc portions that are smoothly connected to each other, or it may be elliptical with a major axis corresponding to R3. When the pressing lever 301 is positioned at the circumferential position for pressing start, the grip lever portion 303 should be oriented almost upright so that it can be easily pressed down by hand. When the pressing lever 301 is positioned at the circumferential position for pressing end, the grip lever portion 303 should be oriented so that it is close to the outer surface 21 of the tubular base portion 12 so that it does not protrude from the outer surface 21 of the tubular base portion 12 and get in the way. The curved shape of the grip lever portion 303 should also be such that a space for inserting a finger is formed between the inner surface of the grip lever portion 303 and the outer surface 21 of the tubular base portion 12.

[0045] Even when the screw-in adjustment amount is large, the push lever 301 can be firmly fixed vertically to the male screw portion 310 without changing the installation orientation of the push lever 301 when the push lever 301 is pushed down.

[0046] A fifth embodiment of the present invention will be described below. In the following description, components similar to those in the first embodiment will be given the same reference numerals and their descriptions will be omitted. The characteristic parts of this embodiment will be described in detail below with reference to Figures 19 and 21. The distinctive features of this embodiment are the same as those of the first embodiment in that the tubular base portion 12 is rotatably held on the annular end face EN of the outer tube X2, and the inner and outer tubes X1 and X2 are fixedly held together by pressing the pressing end face 20 against the outer circumferential surface 13 of the inner tube X1 with fastening screws 16. However, while the first embodiment uses the pressing end faces 20 of each of the legs 18 of a single U-shaped pressing body 14, this embodiment is characterized by employing a pair of L-shaped pressing bodies 14.

[0047] More specifically, as shown in Figure 20, an L-shaped pressing body 14 and a fastening screw portion 16 are provided near each end face 40, 41 of the tubular base portion 12. The L-shaped pressing body 14 has a horizontal portion 330 that forms a pressing load receiving surface 22 on its upper surface, and a vertical portion 332 that extends perpendicularly from one end of the horizontal portion 330 in the opposite direction to the pressing load receiving surface 22. The vertical portion 332 forms a leg, and a pressing end surface 20 is formed at the tip of the vertical portion 332. The L-shaped pressing body 14 has only one leg portion 18 that can pass through the through-slit 32 of the tubular base portion 12, and the other end of the horizontal portion 330 is provided with a contact portion 60 at its end, which has a contact surface 62 that contacts the outer circumferential surface of the tubular base portion 12. The length of the contact portion 60 is set so that the pressing end surface 20 of one leg portion 18 can be pressed against the outer circumferential surface 13 of the inner tube X1. The horizontal portion 330 of each L-shaped pressing body 14 protrudes from the corresponding end faces 40, 41 of the tubular base portion 12, and the vertical portion 332 faces the inner tube X1 or outer tube X2 on the inner tube X1 or outer tube X2 side of the corresponding end faces 40, 41 of the tubular base portion 12. As a result, unlike the first embodiment, the through slit 32 through which the legs pass can be omitted from the tubular base portion 12. The length of the horizontal portion 330 of each L-shaped pressing body 14 is set so that the corresponding vertical portion 332 protrudes from the corresponding end face of the tubular base portion 12. Furthermore, for convenience when rotating the tubular base portion 12 around the longitudinal direction of the outer tubes X1 and X2 to the desired rotational position, the pair of L-shaped pressing bodies 14 and the pair of fastening screw portions 16 are set on the same side of the tubular base portion 12.

[0048] As described above, for example, in a music stand stand in which the music stand is supported at the upper end of the inner tube X1, if the total length of the inner tube X1 is short and the height of the music stand cannot be raised to the desired level, by setting the length of the tubular base portion 12 to be long and providing L-shaped pressing bodies 14 and fastening screw portions 16 near each end of the tubular base portion 12, which omits the through slit 32, the tubular base portion 12 can be rotated to the desired rotation position about the longitudinal direction of the outer tubes X1 and X2 until each fastening screw portion 16 is fastened, similar to the first embodiment. By fastening each fastening screw portion 16, the rotation of the tubular base portion 12 about the longitudinal direction of the inner and outer tubes X1 and X2 can be fixed, and the pair of L-shaped pressing bodies 14 can fix and hold the inner and outer tubes X1 and X2 together.

[0049] On the other hand, if the length of the tubular base portion 12 is short, the L-shaped pressing body 14 and fastening screw portion 16 may be provided in a similar manner only at one end of the tubular base portion 12, as shown in Figure 21, or the U-shaped pressing body 14 may be provided straddling the tubular base portion 12, as shown in Figure 19.

[0050] Alternatively, for each L-shaped pressing body 14 of the tubular base portion 12, the fastening screw portion 16 or the pressing lever 301 may be set independently of each other, with one being the fastening screw portion 16 and the other being the pressing lever 301.

[0051] A sixth embodiment of the present invention will be described below. In the following description, components similar to those in the first embodiment will be given the same reference numerals and their descriptions will be omitted. The characteristic parts of this embodiment will be described in detail below with reference to Figures 22 to 24. Regarding the distinctive features of this embodiment, the tubular base portion 12 is rotatably held on the annular end face EN of the outer tube X2, and the inner and outer tubes X1 and X2 are fixedly held together by pressing the pressing end face 20 against the outer circumferential surface 13 of the inner tube X1 with fastening screws 16, which is common to the first embodiment. However, while the first embodiment uses the pressing end faces 20 of each of the legs 18 of a single U-shaped pressing body 14, this embodiment is characterized in that, when the clearance C between the inner and outer tubes X1 and X2 is large, the lower part of the tubular base portion 12 is inserted into the annular clearance between the inner and outer tubes X1 and X2, and a pair of L-shaped pressing bodies 14 are used, similar to the fifth embodiment.

[0052] More specifically, as shown in Figures 22 to 24, by tightening the fastening screw portion 16, the upper pressing end surface 20 of the L-shaped pressing body 14 is pressed against the outer circumferential surface of the inner tube X1, and the lower contact surface 62 of the L-shaped pressing body 14 is pressed against the bottom surface of the annular groove 64 provided near and below the annular end surface EN of the outer tube X2. As a result, the outer circumferential surface of the inner tube X1 on the opposite side of where the L-shaped pressing body 14 makes contact is pressed against the inner circumferential surface of the tubular base portion 12 in a line contact manner along the entire length of the tubular base portion 12, and the outer tube X2 is pressed in a manner in which it is sandwiched between the lower contact surface 62 of the L-shaped pressing body 14 and the outer circumferential surface of the tubular base portion 12, thereby fixing and holding the inner and outer tubes X1 and X2 together. Although the lower contact surface 62 of the L-shaped pressing body 14 fits into the bottom surface of the annular groove 64, thus reliably preventing the tubular base portion 12 from coming out upward from the outer tube X2 via the L-shaped pressing body 14, the annular shoulder portion 17 of the tubular base portion 12 can be placed on the annular end face EN of the outer tube X2, and the inner and outer tubes X1 and X2 can be rotated around their longitudinal directions to the desired rotation position, and the fastening screw portion 16 can be tightened to prevent the tubular base portion 12 from coming out upward from the outer tube X2, and the annular groove 64 may be omitted.

[0053] As described above, unlike the first embodiment, it is sufficient to provide the annular shoulder portion 17 on the outer surface of the tubular base portion 12 without providing a step on the inner surface of the tubular base portion 12 and providing the annular shoulder portion 17. Also, unlike the first embodiment, the side opposite to the outer surface of the inner tube X1 that the L-shaped pressing body 14 contacts is not pressed against the inner surface of the outer tube X2. The outer tube X2 is pressed in a manner in which it is sandwiched between the lower contact surface 62 of the L-shaped pressing body 14 and the outer surface of the tubular base portion 12. Therefore, the outer tube X2 does not necessarily have to be made of metal that can ensure strength against the pressing load, for example, a thin-walled metal or resin. The clearance C between the inner and outer tubes X1 and X2 is appropriate as long as the annular reduced diameter portion below the annular shoulder portion 17 of the tubular base portion 12 can be inserted. For example, in the case of a music stand, it is preferably about the same as the wall thickness of the outer tube X2, which is a few millimeters. Furthermore, the vertical positional relationship between the inner and outer tubes X1 and X2 does not need to be such that they overlap, as shown in the figure. It is sufficient that the inner tube X1 is positioned so that the upper pressing end face 20 of the L-shaped pressing body 14 can be pressed against the outer surface of the inner tube X1.

[0054] Although embodiments of the present invention have been described in detail above, various modifications and changes are possible for those skilled in the art 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 X1, the tip of the male threaded portion 26 of the fastening screw portion 16 is described as penetrating the female threaded portion 34 of the outer tube X2 or the tubular base portion 12 so as not to come into contact with the outer surface of the inner tube X1. However, the invention is not limited to this, and when the inner and outer tubes X1 and X2 are made of metal, in addition to the pressing end face 20 of the pressing body 14, the tip of the male threaded portion 26 of the fastening screw portion 16 comes into contact with the outer surface of the inner tube X1, making it possible to more firmly fix the position of the outer tube X2 relative to the inner tube X1. This is effective when the inner and outer tubes X1 and X2 are oriented vertically and either the inner or outer tube X1 or X2 is used to support a heavy object at a predetermined height.

[0055] For example, in the first embodiment, the tightening screw portion 16 is described as having a male screw portion 26 and a head portion 28 that is pinched and rotated with the fingers, while a female screw portion 34 is provided on the outer circumferential surface 15 of the outer tube X2. However, the invention is not limited to this, and the tightening screw portion 16 may be nut-shaped, with the male screw portion 26 provided on the outer circumferential surface 15 of the outer tube X2, and the tightening screw portion 16 screwing onto the male screw portion 26. For example, in the first embodiment, it was described that a single fixed support jig is provided at a predetermined position on the inner and outer pipes X1 and X2, but it is not limited to this. For example, when a pair of through slits 32 are provided at intervals in the longitudinal direction of the inner and outer pipes X2, multiple sets of such through slits 32 may be provided in the circumferential direction of the inner and outer pipes X1 and X2, and a multiple pressing body may be provided accordingly. For each pressing body, it is possible to independently and individually select whether to use a common fastening screw portion 16 or a pressing lever 301 as the pressing load applying portion that applies the pressing load to the pressing load receiving portion of the pressing body 14. [Brief explanation of the drawing]

[0056] [Figure 1] This is an overall perspective view of a fixed support jig according to the first embodiment of the present invention. [Figure 2] This is an exploded perspective view of a fixed support jig according to the first embodiment of the present invention. [Figure 3] This is a perspective view of the tubular base portion 12 of the fixed support jig according to the first embodiment of the present invention. [Figure 4] This is a perspective view of the pressing body of the fixed support jig according to the first embodiment of the present invention. [Figure 5] This is a perspective view of the fastening screw portion of a fixed support jig according to the first embodiment of the present invention. [Figure 6] This is a side cross-sectional view of a fixed support jig according to the first embodiment of the present invention. [Figure 7] This is a cross-sectional view of a fixed support jig according to the first embodiment of the present invention, taken along line AA before and after fastening with fastening screws. [Figure 8] This is a cross-sectional view of a fixed support jig according to the first embodiment of the present invention, showing the line BB before and after fastening with fastening screws. [Figure 9] This figure corresponds to Figure 2 of the fixed support jig according to the second embodiment of the present invention. [Figure 10] This figure corresponds to Figure 6 of the fixed support jig according to the second embodiment of the present invention. [Figure 11] This is a perspective view of a music stand to which a fixed support jig according to the first embodiment of the present invention is applied. [Figure 12] This is an exploded view of a fixed support jig according to a fourth embodiment of the present invention. [Figure 13] This is a perspective view of a fixed support jig according to a fourth embodiment of the present invention. [Figure 14] This is a cross-sectional view of a fixed support jig according to a fourth embodiment of the present invention. [Figure 15] This figure shows the operation of the fixed support jig according to the fourth embodiment of the present invention. [Figure 16] This figure corresponds to Figure 2 of a modified example of the fixed support jig according to the first embodiment of the present invention. [Figure 17] This figure corresponds to Figure 6 of the fixed support jig according to the third embodiment of the present invention. [Figure 18] This figure corresponds to Figure 6, which shows a modified example of the fixed support jig according to the first embodiment of the present invention. [Figure 19] This is a diagram of a fixed support jig according to a fifth embodiment of the present invention. [Figure 20] This is a diagram of a fixed support jig according to a fifth embodiment of the present invention. [Figure 21] This is a diagram of a fixed support jig according to a fifth embodiment of the present invention. [Figure 22] This figure corresponds to Figure 2 of the fixed support jig according to the sixth embodiment of the present invention. [Figure 23] This is a diagram of a fixed support jig according to the sixth embodiment of the present invention. [Figure 24] This is a cross-sectional view of a fixed support jig according to the sixth embodiment of the present invention. [Explanation of Symbols]

[0057] D Head diameter F Music stand L1 Leg length L2 Leg length 10 Fixing support jig X1 inner tube X2 outer tube 12 Tubular base section 13Outer surface 14 Pressing body 15 Outer surface 16. Tightening screw section 17 Circular shoulder 18 Legs 19 Inner surface 20 Pressing end face 21Outer surface 22 Load-bearing surface 24 Stupid Hole 25 Protrusion 26 Male threaded section 28 One end 32 Slit through holes 34 Female thread section 36 Female threaded section 38 grub screws 40 End circumference 42 Aperture 60 Contact part 62 Contact surface 100 Music Stands 106 Tripod part 300 Push lever mechanism 301 Push lever 302 Axis 303 Grip lever section 304 pins 308 Rotating part 310 spaces 312 Curved surface 314 Ring Plate 333 Hollow Sleeve 335 Male threaded section 337 Female thread section

Claims

1. A fixing support jig for fixing and supporting a heavy object at a predetermined height, wherein at least one of the inner tubes has a circular cross-section, both extending vertically and fitting together, and interposed between an inner tube and an outer tube, It has a through hole on its outer surface, a tubular base portion that is rotatable in the axial direction of the outer tube and can be fitted onto the outer surface of one end of the outer tube, The tubular base portion is composed of a first external fitting portion that extends from one end toward the outer tube and whose inner circumferential surface is fitted onto the outer tube with a first predetermined clearance facing the outer circumferential surface of the outer tube, and a second external fitting portion that extends from one end toward the inner tube and whose inner circumferential surface is fitted onto the inner tube with a second predetermined clearance facing the outer circumferential surface of the inner tube. Furthermore, a pressing body provided on the outside of the tubular base portion includes a pressing load receiving portion having a pressing load receiving surface, and a pressing end surface that penetrates the through hole and can be pressed against the outer circumferential surface of the inner tube, The aforementioned pressing load receiving portion has a single pressing load applying portion that applies a pressing load, A fixing support jig characterized in that, when supporting a heavy object with either the inner or outer tube, the fitting position of the inner tube to the outer tube is adjusted according to a predetermined height of the heavy object, and the pressing body is pressed toward the inner tube by the single pressing load applying part through the through hole of the tubular base part set to a desired rotation position centered on the longitudinal direction of the inner and outer tubes, via the pressing load receiving surface, thereby causing the pressing end face to make surface contact with the outer circumferential surface of the inner tube, and at the same time pressing and fixing the outer circumferential surface of the inner tube opposite to the surface contact portion of the pressing end face to the inner circumferential surface of the outer tube or the inner circumferential surface of the tubular base part.

2. The fixing support jig according to claim 1, wherein the inner diameter of the second outer fitting portion is set to be smaller than the inner diameter of the first outer fitting portion, an annular shoulder portion is formed at the connecting portion between the first outer fitting portion and the second outer fitting portion, and the annular shoulder portion is placed on one end of the outer tube.

3. The pressing end face has a hardness such that it does not deform when pressed against the outer surface of the inner tube. The fixing support jig according to claim 1, wherein the pressing end face is formed to conform to the outer circumferential surface of the inner tube.

4. The inner tube and the outer tube are each cylindrical, and the fixing and securing of the outer surface of the inner tube against the inner surface of the outer tube is achieved by pressing and securing the outer surface of the inner tube opposite to the pressing and securing portion by the pressing end face against the inner surface of the outer tube in a vertical line contact manner, thereby fixing and supporting the outer tube with respect to the inner tube by three support points, as described in claim 1.

5. The single pressing load application part is a tightening screw part, and the tightening screw part has a shank part and a male screw part extending downward from the lower surface of the shank part. An annular surface is formed on the lower surface, surrounding the male screw portion. The outer surface of the tubular base portion is provided with a female screw portion. The fixing support jig according to claim 1, wherein the male threaded portion is screwed into the female threaded portion through a clearance hole provided in the pressing body, so that the lower surface of the shank portion and the pressing load receiving surface of the pressing body come into contact, thereby fixing the tightening threaded portion and the pressing body together to the inner pipe and screwing them into the outer pipe.

6. The fixing support jig according to claim 5, wherein the tightening screw portion has a head portion that can be rotated by pinching it with your fingers at the end of the shank portion on the male screw portion side and the end opposite to it.

7. The fixed support jig is made of metal, the pressing body has a U-shaped cross-section with a pair of legs whose end faces constitute the pressing end faces, the through holes are provided as a pair of through holes corresponding to the pair of legs, the pair of through holes are provided so as to extend in the circumferential direction of the inner and outer tubes, separated from each other by a predetermined distance in the longitudinal direction of the inner and outer tubes, the female thread portion is provided between the pair of through holes, and a heavy object is supported at a predetermined height by either the inner or outer tube, as described in claim 5.

8. The fixing support jig according to claim 5, wherein the rotation of the tubular base portion is prevented by fastening the aforementioned tightening screw portion, and the inner and outer tubes are fixed and held in a predetermined fitting position.

9. The fixing support jig according to claim 5, wherein the pressing body and the through hole are each configured as a pair of pressing bodies and a pair of through holes, and with the pair of pressing bodies inserted into the pair of through holes, an opening is provided in the thickness direction of the one leg of the tubular base portion on the side furthest from the end of a pair of opposing sides constituting the one leg, and the end face of the tubular base portion opposite to the side furthest from the end of the pair of sides is provided with a hole that extends through to the side furthest from the end of the pair of sides constituting the one leg, and a grub screw that can be screwed into the hole is further provided, and by inserting the pair of pressing bodies into the pair of through holes, with the opening communicating with the hole, the grub screw is screwed into the hole and its tip is inserted into the opening, thereby the pair of pressing bodies are detachably held within the pair of through holes.

10. A music stand having the fixed support jig described in claim 1, wherein the inner tube or the outer tube supports a music stand, musical instrument, microphone, or amplifier by the end opposite to the fitting portion of the inner and outer tubes.

11. A medical stand having the fixed support jig described in claim 1, wherein casters are provided on the end of the inner tube or the outer tube opposite to the fitting portion of the inner and outer tubes, making it movable, and the end of the outer tube or the inner tube opposite to the fitting portion of the inner and outer tubes supports an intravenous drip, monitor, and lighting.

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