Fixing support tool and fixing support method for 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 support jig and a method for fixing and supporting inner and outer tubes, and more particularly to a fixing support jig and a method for fixing and supporting inner and outer tubes that are applied to music stands and have a simple structure to improve usability when adjusting the stand height. [Background technology]

[0002] The inventor of the present application has proposed in Patent Document 1 a length adjusting jig that has a simple structure and can be easily operated to adjust the overall length of the inner tube and the outer tube.

[0003] The length adjustment jig of the present invention is a length adjustment jig interposed between an inner tube and an outer tube that are fitted to each other, and has a pair of through slits spaced apart on the outer surface of the outer tube, a female threaded portion between the pair of through slits, a pressing portion that is positioned on the outer surface of the outer tube and passes through the pair of through slits to contact the outer surface of the inner tube, and a tightening screw portion that can press and fix the pressing portion against the outer surface of the inner tube, and the tightening screw portion has a male threaded portion that can be threaded into the female threaded portion, and has an opening that faces the inner surface of the outer tube after adjusting the fitting position of the inner tube relative to the outer tube, and is configured so that without providing a pressing portion storage space that protrudes outside the outer tube, the male threaded portion is threaded into the female threaded portion by the tightening screw portion, and the pressing portion is passed through the pair of through slits to press and fix against the outer surface of the inner tube.

[0004] According to the length adjusting jig having the above-mentioned configuration, the length of the mating portion of the inner and outer tubes that are fitted together is adjusted by the female screw portion provided on the outer surface of each outer tube, at least one through hole within a predetermined range from the female screw portion, at least one pressing portion that passes through the through hole from the outer peripheral surface of the outer tube and abuts against the outer peripheral surface of the inner tube, and a fastening screw portion that can press and fix the pressing portion against the outer peripheral surface of the inner tube.By shaping the tip surface of the pressing portion to fit along the outer peripheral surface of the inner tube so that it can come into surface contact with the outer peripheral surface of the inner tube, the mating position of the inner tube with the outer tube is adjusted, and then, without providing a pressing portion storage space that has an opening facing the inner peripheral surface of the outer tube and protrudes outside the outer tube, the male screw portion is screwed into the female screw portion provided on the outer peripheral surface of the outer tube by rotating the fastening screw portion, and the pressing portion within a predetermined range from the female screw portion is pressed against the outer peripheral surface of the inner tube by screwing in the fastening screw portion. The through hole can be passed through and the tip surface can be pressed and fixed in a surface contact manner against the outer peripheral surface of the inner tube, and the simple structure does not require excessive tightening force and can be adjusted with a simple operation so that the overall length of the inner tube and outer tube can be fixed and held in place.

[0005] However, when such a length adjusting jig is applied to a music stand for a music stand, a microphone, an amplifier, or the like, 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, it is also difficult and inconvenient to lift a heavy music stand, microphone stand, or amplifier stand and rotate the tube body around its longitudinal axis to change the fastening screw from the left side to the right side. A performer may need to adjust the height of the music stand by changing instruments while playing, so it is desirable to be able to easily adjust the height using a fastening screw. Furthermore, when multiple performers are performing, such as in an orchestra or big band, it looks better to the audience if the fastening screws of each performer are facing the same direction, but it is inconvenient to have to lift heavy music stands, microphone stands, and amplifier stands and adjust the direction of the fastening screws around the longitudinal direction of the stands. The above problems also exist in medical stands that are equipped with casters at the end of the inner or outer tube opposite the fitting portion of the inner and outer tubes, making them movable, and that support an IV drip, monitor, or lighting on the end of the outer or inner tube opposite the fitting portion of the inner and outer tubes. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 7369944 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0007] In view of the above technical problems, an object of the present invention is to provide a fixing support jig and a fixing support method for inner and outer tubes that are applicable to music and medical stands and have a simple structure and improved usability when adjusting the stand height. 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 music stands and medical stands that have existing inner and outer tube fitting structures, and that can firmly fix and hold the inner and outer tubes while improving usability with a simple structure when adjusting the stand height. [Means for solving the problem]

[0008] In order to achieve the above object, the fixing support jig of the present invention comprises: A fixing support jig is interposed between an inner tube and an outer tube, at least one of which has a circular cross section and both of which extend in the vertical direction and fit together, and which fixes and supports a heavy object at a predetermined height, A through hole is provided on the outer peripheral surface, rotatable in the axial direction of the outer tube; a tubular base portion that can be fitted onto an outer peripheral surface of one end of the outer tube; the tubular base portion comprises a first outer fitting portion extending from the one end toward the outer pipe and fitting onto the outer pipe with an inner circumferential surface facing the outer circumferential surface of the outer pipe with a first predetermined clearance, and a second outer fitting portion extending from the one end toward the inner pipe and fitting onto the inner pipe with an inner circumferential surface facing the outer circumferential surface of the inner pipe with a second predetermined clearance, Furthermore, a pressing load receiving portion having a pressing load receiving surface; Through the through hole a pressing end surface that can be pressed against the outer circumferential surface of the inner pipe; Provided on the outside of the tubular base A pressing body; A pressing load is applied to the pressing load receiving portion. single a pressing load applying section, When a heavy object is supported by either the inner or outer tube, the fitting position of the inner tube relative to the outer tube is adjusted according to a predetermined height of the heavy object, and then the inner tube is fitted to the outer tube through the through hole of the tubular base portion set at a desired rotation position around the longitudinal direction of the inner or outer tube. single The pressing body is pressed against the inner pipe via the pressing load receiving surface by the pressing load applying portion, so that the pressing end surface is brought into surface contact with the outer peripheral surface of the inner pipe. At the same time, The outer peripheral surface of the inner tube on the opposite side 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 or the inner peripheral surface of the tubular base.

[0009] Furthermore, the inner diameter of the second outer fitting portion is set smaller than the inner diameter of the first outer fitting portion, and an annular shoulder portion is formed at the connection portion between the first outer fitting portion and the second outer fitting portion, and the annular shoulder portion is preferably placed on one circumferential end of the outer tube. Furthermore, the pressing end surface has a hardness such that it is not deformed by being pressed against the outer circumferential surface of the inner tube, The pressing end surface is preferably formed so as to fit along the outer peripheral surface of the inner tube. Furthermore, it is preferable that each of the inner tube and the outer tube is cylindrical, and that the outer surface of the inner tube is pressed and fixed to the inner surface of the outer tube by pressing and fixing the outer surface of the inner tube opposite the pressing and fixing portion by the pressing end face against the inner surface of the outer tube in a line contact manner in the vertical direction, and that the outer tube is fixed and supported to the inner tube by support at three points.

[0010] In addition, the fastening screw portion has a shank portion and the male screw portion extending downward from a lower surface of the shank portion, An annular surface is formed on the lower surface to surround the male thread portion, By threading the male threaded portion into the female threaded portion through the clearance hole, the lower surface of the shank portion and the pressing load receiving surface of the pressing body come into contact, and the fastening screw portion and the pressing body are integrally pressed and fixed to the inner tube and screwed into the outer tube. The fastening screw portion preferably has a head portion that can be held and turned by fingers at the end of the shank portion opposite to the end of the male screw portion. Furthermore, the fixed support jig is made of metal, and the pair of through holes are arranged at a predetermined interval in the longitudinal direction of the inner and outer tubes, extending circumferentially of the inner and outer tubes, respectively, and it is preferable that either the inner or outer tube supports a heavy object at a predetermined height. Furthermore, it is preferable that the inner and outer tubes are fixed and held in a predetermined fitted position by fastening the fastening screws while preventing rotation of the tubular base.

[0011] In addition, the presser body on the side of the outer tube near the end of the fitting portion between the outer tube and the inner tube has an insertion hole formed in the thickness direction of the presser body from the side closest to the end of the outer tube, of a pair of opposing side surfaces constituting the presser body; the end surface of the outer tube on the fitting portion side has a circular elongated hole with a circular opening at the end surface and extending through to the side surface closest to the end of the outer tube; and the presser body further has an insertion rod insertable from the circular opening into the elongated hole; by inserting the pair of presser bodies into the pair of through holes, the elongated hole communicates with the insertion hole; by inserting the tip end of the insertion rod into the insertion hole, the pair of presser bodies are held within the pair of through holes; the elongated hole has a female screw portion; and the insertion rod is a set screw that can be screwed into the female screw portion of the elongated hole; and while the set screw is screwed into the elongated hole, the tip end is inserted into the insertion hole. Preferably, the pair of pressing bodies are detachably held within the pair of through holes by being inserted into the through holes. It may also be a music stand having the fixing support jig described in claim 1, and supporting a music stand, musical instrument, microphone or amplifier by the end of the inner tube or the outer tube opposite the fitting portion of the inner and outer tubes. Furthermore, the present invention may be a medical stand that has the fixing support jig described in claim 1, has casters provided at the end of the inner tube or the outer tube opposite the fitting portion of the inner and outer tube, is movable, and supports an IV drip, a monitor, and lighting by the end of the outer tube or the inner tube opposite the fitting portion of the inner and outer tube. BEST MODE FOR CARRYING OUT THE INVENTION

[0012] A first embodiment of the fixing 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 pipe X1 and outer pipe X2, which fit together, in the longitudinal direction of the pipes, and is roughly composed of a tubular base portion 12 attached and fixed to the outer peripheral surface of one end of the outer pipe X2, a pressing body 14 interposed between the inner pipe X1 and the outer pipe X2 and having a pressing end surface 20 that can be pressed against the outer peripheral surface 13 of the inner pipe X1, and a tightening screw portion 16 that can press and fix the pressing body 14 against the outer peripheral surface 13 of the inner pipe X1. The length, thickness and cross-sectional shape of each of the inner tube X1 and the outer tube X2 may be selected depending on the application, and as will be described later, the fitting length between the inner tube X1 and the outer tube X2 is adjusted so that the overall length of the inner tube X1 and the outer tube X2 can be adjusted.

[0013] For example, each of the inner tube X1 and the outer tube X2 is hollow cylindrical, and the inner circumferential surface 17 of the outer tube X2 is inserted from one end opening into one end opening of the outer circumferential surface 13 of the inner tube X1, so that the outer tube X2 fits onto the inner tube X1. Note that from the viewpoint of fitting the outer tube X2 onto the inner tube X1, the outer tube X2 needs to be hollow, but does not necessarily need to have a circular cross section, while the inner tube X1 does not need to be hollow and may be solid, for example, from the viewpoint of ensuring strength. When the outer tube X2 is fitted into 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 relative to the inner tube X1 by the fastening screw portion 16 via the pressing body 14, as will be described later. The slight clearance is, for example, 0.05 mm to 0.1 mm. A pair of through slits 32 are provided on the outer surface 21 of the tubular base portion 12, spaced apart by a distance D, and a female screw portion 34 is provided between the pair of through slits 32. The distance D between the pair of through slits 32 can be selected according to the application of the fixed support jig 10, as will be described later. The tubular base portion 12 is attached and fixed to one end of the outer tube X2, and has a pair of through slits 32 spaced apart on the outer surface 21 of the tubular base portion 12, and a female screw portion 34 provided between the pair of through slits 32.

[0014] More specifically, the tubular base portion 12 is a hollow cylinder whose one end can be fitted onto one end 28 of the outer tube X2, and the inner tube X1 is inserted into the other end with a predetermined clearance between it and the outer peripheral surface 21 of the tubular base portion 12. The tubular base portion 12 is preferably made of metal and is hollow cylindrical, with the diameter of the inner surface 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 may be, for example, cocoon-shaped with a wider diameter in the center. The thickness and longitudinal length of the tube may be set as appropriate as long as it is possible to fix and support the inner tube X1 and outer tube X2 that fit together in the longitudinal direction of the tube, for example, a few millimeters or a few centimeters.

[0015] The tubular base portion 12 is composed of a first outer fitting portion extending from one end toward the outer tube X2 and fitting externally onto the outer tube X2, with its inner peripheral surface facing the outer peripheral surface of the outer tube X2 with a first predetermined clearance, and a second outer fitting portion extending from one end toward the inner tube X1 and fitting externally onto the inner tube X1, with its inner peripheral surface facing 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 outer fitting portion, and the other of the pair of through-hole slits 32 is provided in the second outer fitting portion. The diameter of the second outer fitting portion is set smaller than the diameter of the first outer fitting portion. The second outer fitting portion constitutes a reduced diameter portion, and the first outer fitting portion constitutes an expanded diameter portion. An annular shoulder portion 17 is formed at the connection portion between the first outer fitting portion and the second outer fitting portion, and the annular shoulder portion 17 can be placed on the annular end face 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 the perspective appropriate for use as a music stand, and may be, for example, 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, X2 at a predetermined interval from each other in the longitudinal direction of the inner and outer tubes X1, X2, respectively. More specifically, each of the pair of through slits 32 is an elongated opening, and the width of the opening need only be such that the pressing body 14 can pass through in the thickness direction. As will be explained later, since the pressing body is fastened and fixed to the outer tube X2 via the fastening screw portion 16, there is no need for the pressing body 14 to pass through the pair of through slits 32 provided on the outer surface 16 of the outer tube X2 in a tight fit manner, and clearance is allowed between the periphery of the through slits 32 and the outer periphery of the pressing body 14, particularly the leg portion 18 (explained later).

[0017] The pressing body 14 is positioned on the outer circumferential surface 21 of the tubular sleeve portion 12, passes through a pair of through slits 32, and comes into contact with the outer circumferential surface 13 of the inner tube X1 and the outer circumferential surface 15 of the outer tube X2. More specifically, the male thread portion 26 of the tightening screw portion 16 forms a pressing body 14 having a roughly U-shaped vertical cross section, which has a clearance hole 24 that penetrates in the thickness direction and two legs 18 that extend in opposite directions from the clearance hole 24. The pressing body 14 has a protrusion 25 on its upper surface 22, which is provided with a clearance hole 24, and by threading the male thread 26 into the female thread 34, the lower surface 38 of the shank comes into contact with the upper surface of the protrusion 42 of the pressing body 14, whereby the fastening screw portion 16 and the pressing body 14 are integrally fastened to the inner tube X1 and outer tube X2 in a screw-fit manner. The upper surface of the protrusion 42 functions as a pressing load receiving portion having a pressing load receiving surface. Pressing end faces 20, which are the tip surfaces of each of a pair of legs 18 spaced apart in the extension direction of the pressing load receiving portion, are shaped to follow the outer peripheral surface 13 of the inner tube X1 and the outer peripheral surface 15 of the outer tube X2 so as to be able to come into surface contact with the outer peripheral surface 13 of the inner tube X1 and the outer peripheral surface 15 of the outer tube X2. For example, if the outer peripheral surface 13 of the inner tube X1 is the outer surface of a cylinder, the pressing end face 20 will have an arc-shaped cross section of that diameter. In this case, unlike the fastening screw portion 16, the pressing body 14 itself does not need to be rotated toward the outer peripheral surface 13 of the inner tube X1 and the outer peripheral surface 15 of the outer tube X2, so it is possible to press the pressing end faces 20 against the outer peripheral surface 13 of the inner tube X1 and the outer peripheral surface 15 of the outer tube X2 in an orientation such that the arc-shaped cross section matches the outer peripheral surface 13 of the inner tube X1 and the outer peripheral surface 15 of the outer tube X2. It is not necessary for each pressing end face 20 to be in close contact with the outer circumferential surface 13 of the inner tube X1 and the outer circumferential surface 15 of the outer tube X2.

[0018] The fastening screw portion 16 is configured to be able to press and fix the pressing body 14 against the outer peripheral surface 13 of the inner tube X1, and the fastening 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 being able to be threaded 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 relative to the outer tube X2, the male threaded portion 26 is screwed into the female threaded portion 34 using the tightening screw portion 16, and the pressing body 14 is passed through the pair of through slits 32 and pressed and fixed against the outer peripheral surface 13 of the inner tube X1. The clamping screw portion 16 has a head portion 28 that can be gripped and rotated with fingers at the end opposite the male threaded end of the shank portion 36. The diameter of the head portion 28 is preferably as large as possible so that it can be gripped with fingers with little force and rotated, and from the standpoint of preventing slippage, it may be provided with a plurality of shallow grooves spaced apart in the circumferential direction.

[0019] Regarding the use of the fixed support jig 10, the pair of through slits 32 are arranged at a predetermined interval from each other in the longitudinal direction of the inner and outer tubes X1 and X2, extending in the circumferential direction of the inner and outer tubes X1 and X2, respectively, and the inner and outer tubes X1 and X2 are oriented vertically, and a heavy object is supported at a predetermined height by either the inner or outer tube X1 or X2. In particular, when using the fixing 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 extending in the vertical direction, 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 peripheral surface 13 of the inner tube X1, the greater the resistance of the pressing surface of the pressing body 14 against the outer peripheral surface 13 of the inner tube X1, i.e., the greater the tightening force by the fastening screw portion 16, and for this reason, the pressing body 14 and fastening screw portion 16, as well as the inner and outer tubes X1 and X2 that constitute the fixing support jig 10, are preferably made of metal.

[0020] As a variant, the fixing support jig 10 may be made of resin from the viewpoint of lightness, and in particular, even if a pair of slit portions and an opening for the female screw portion 34 are provided, it is preferable to ensure a certain 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 tubes X1 and X2 at a predetermined interval from each other in the circumferential direction of the inner and outer tubes X1 and X2, respectively.

[0021] The following describes a method for adjusting the lengths of the inner and outer pipes X1 and X2, particularly for the existing inner and outer pipes X1 and X2 that fit together: a step of fitting a tubular base portion 12 having a circular inner circumferential surface on an upper end portion of the outer tube X2; a step of fitting the inner tube X1 into the tubular base portion 12 or the outer tube X2; rotating the tubular base portion 12 to a desired rotation position around the longitudinal direction of the outer tube X2; and a step of pressing the tubular base portion 12 from the outside toward the outer peripheral surface of the inner tube X1 in the thickness direction of the tubular base portion 12, thereby fixing the tubular base portion 12 at a desired rotational position around the longitudinal direction of the outer tube X2, while pressing the outer peripheral surface of the opposite side of the inner tube X1 against the inner peripheral surface of the tubular base portion 12 or the outer tube X2, thereby fixing and holding the inner and outer tubes X1 and X2 together in the longitudinal direction.

[0022] Furthermore, it is preferable to include a step of 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, thereby fixing the tubular base portion 12 at a desired rotational position around the longitudinal direction of the outer tube X2, and pressing the outer surface of the opposite side of the outer tube X2 against the inner surface of the tubular base portion 12, thereby fixing and holding the inner and outer tubes X1, X2 together in the longitudinal direction. The inner peripheral surface of the tubular base portion 12 is provided with a reduced diameter portion that is set larger than the diameter of the inner tube X1 and an expanded diameter portion that is set larger than the diameter of the outer tube X2, and an annular shoulder portion 17 is formed at the connection between the reduced diameter portion and the expanded diameter portion. The annular shoulder portion 17 is preferably placed on the annular upper end surface EN of the outer tube X2, and the tubular base portion 12 can be rotated to a desired rotational position around the longitudinal direction of the outer tube X2.

[0023] Hereinafter, a case where the fixing support jig 10 is applied to an existing music stand stand 100 will be described, taking a music stand as an example of a music stand. As shown in Figure 11, in existing music stand stands, the inner and outer tubes fit together, with the music stand connected to the upper end of the inner tube X1, while a tripod part 106 is connected to the lower end of the outer tube X2, holding the music stand stand upright. The fit between the lower end of the inner tube X1 and the upper end of the outer tube X2 is, for example, screwed in such a way that the height can be adjusted, with the screw passing sideways through a through hole in the outer tube X2 and the tip of the screw hitting the outer surface of the inner tube X1 to hold it in place.

[0024] First, the screws are released and removed, and 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, while supporting the inner tube X1 with one hand, the tubular base portion 12 of the fixed support jig 10 is fitted onto the upper end of the outer tube X2 from one opening with the other hand, so that the annular shoulder portion 17 of the tubular base portion 12 rests on the upper circumferential end of the outer tube X2. The tubular base portion 12 fits over the upper end of the outer tube X2, with a predetermined clearance maintained between the inner circumferential surface of the tubular base portion 12 and the outer circumferential surfaces of the outer tube X2 and inner tube X1, and the tubular base portion 12 is supported by the upper end of the outer tube X2 and can freely rotate about the longitudinal direction of the inner and outer tubes. Next, with the other hand, the tubular base portion 12 is rotated about the longitudinal direction of the inner and outer tubes, and positioned at a desired rotation position, for example, a position where the fastening screw 16 can be fastened with the right hand in the case of a right-handed person.

[0025] Next, while supporting the inner tube X1 with one hand, the fastening screw 16 is tightened with the other hand to prevent the inner and outer tubes X2 of the tubular base portion 12 from rotating around the longitudinal direction, and the inner and outer tubes X2 are fixed and supported together, and the music stand F is set to the desired height. More specifically, the clamping screw portion is passed through the clearance hole of the load receiving portion, and the male screw portion is screwed into the female screw portion, while one of the pair of pressing bodies is passed through the through hole of the first outer fitting portion, and the corresponding pressing end face is brought into surface contact with the outer circumferential face of the inner pipe X1, and the outer circumferential face of the inner pipe X1 on the opposite side of the surface contact portion of the pressing end face with the inner pipe X1 is pressed and fixed against the inner circumferential face of the outer pipe X2 at the fitting portion of the inner and outer pipes X2, and the other of the pair of pressing bodies is passed through the through hole of the second outer fitting portion, and the corresponding pressing end face is brought into surface contact with the outer circumferential face of the outer pipe X2, and the pressing and fixing are performed. The tubular base portion 12 attached to the outer surface of one end of the outer tube X2 is free to rotate around the longitudinal direction of the inner and outer tubes X1, X2 until it is screwed in by the fastening screw portion 16. By screwing in the fastening screw portion 16, the rotation of the tubular base portion 12 is fixed and the inner and outer tubes X1, X2 can be fixed and held relative to each other in the longitudinal direction of the inner and outer tubes X1, X2. When such a fixing support jig is applied to a music stand, the simple structure makes it possible to improve usability when adjusting the stand height. For example, when multiple instruments are performed in front of an audience, such as in a big band, the music stand F-stands placed in front of each performer are not lightweight foldable music stand F-stands, but rather large, heavy music stand F-stands with a wide tube diameter.By setting a large number of these heavy-looking music stand F-stands in aligned, rotated positions, it is easy to create a unified appearance. To change the height of the music stand F, all that is required is to loosen the fastening screw 16, adjust the fitting position of the inner tube X1 relative to the outer tube X2, and then fasten it again. In particular, when lowering the height of the music stand F, the inner tube X1 will fall under its own weight if the fastening screw 16 is loosened with one hand and quickly fastened, so there is no need to support the inner tube X1 with the other hand. If the existing screws can also be used for the fixing support jig, they may be used as they are without preparing new screws.

[0026] As described above, by adjusting the fitting length of the inner tube X2 relative 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 narrowing side and the inner widening 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 can freely rotate around the longitudinal direction of the inner and outer tubes X1, so that while holding the inner tube X2 with one hand, it is possible to easily rotate the tubular base portion 12 to the desired rotation position with the other hand.

[0027] Next, by threading the fastening screw 16 into the tubular base portion 12, one pressing end face 20 of the U-shaped pressing body 14 comes into contact with the outer peripheral surface 13 of the inner tube X2, and the outer peripheral surface 13 of the inner tube X2 on the opposite diametric side is pressed against the inner peripheral surface of the inner narrowing side portion 17 of the tubular base portion 12, and the other pressing end face 20 of the U-shaped pressing body 14 comes into contact with the outer peripheral surface 13 of the inner tube X2, and the outer peripheral surface 13 of the inner tube X2 on the opposite diametric side is pressed against the inner peripheral surface of the inner expanding side portion 19 of the tubular base portion 12, thereby fixing the inner tube X2 and the outer tube X1 to the tubular base portion 12. Therefore, even if there is clearance at the fitting portion of the inner and outer tubes X1, the inner tube X2 and the outer tube X1 are fixed to each other in the longitudinal direction of the tubes, and 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 from the pressing load receiving surface 22 of one pressing end face 20 corresponding to the inner tube X2 and the length L2 from the pressing load receiving surface 22 of the other pressing end face 20 corresponding to the outer tube X1 is determined by the thickness t1 of the outer tube X1 and the clearance between the outer peripheral surface 13 of the inner tube X2 and the inner peripheral surface 23 of the outer tube X1, and is set to be at least larger 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 larger 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 narrowing side and the inner widening side of the tubular base portion 12 to a larger size, and by preparing multiple types of U-shaped pressing bodies 14 with different lengths L1 and L2, it is possible to apply a versatile tubular base portion 12 to a music stand having an existing inner and outer tube X1 while selecting the type of U-shaped pressing body 14, and instead of replacing the entire music stand, it is possible to add and attach only the tubular base portion 12, the U-shaped pressing body 14, and a fixing and holding jig having a fastening screw 16. It is preferable to select the type of U-shaped pressing body 14 so that one pressing end face 20 and the other pressing end face 20 simultaneously contact the outer peripheral surfaces of the inner tube X2 and the outer tube X1, but even if they do not contact simultaneously, the inner and outer tubes X1 can be fixed and held together and the tubular base portion 12 can be rotated and fixed by slightly inclining the pressing load receiving surface 22 of the U-shaped pressing body 14.

[0029] On the other hand, by precisely setting the width of the annular shoulder portion 17 of the tubular base portion 12 for the existing inner and outer tubes X1, X2 and creating a custom-made tubular base portion 12 with no clearance where the inner and outer tubes X1, X2 fit together, the fastening screw portion 16 not only causes the U-shaped pressing body 14 to press the inner and outer tubes X1, X2 against the inner surface of the tubular base portion 12, but also presses the outer surface 13 of the inner tube X2 in line contact against the inner surface of the outer tube X1 on the diametrically opposite side of the pressing end face 20 of the U-shaped pressing body 14 at the fitting portion of the inner and outer tubes X1, X2, so that the inner tube X2 and the outer tube X1 can be more firmly fixed and held together in the longitudinal direction of the tubes, which is effective, for example, in stands for supporting heavy objects such as music amplifiers and large musical instruments. By screwing in the fastening screw, the inner and outer tubes are fixed together via the tubular base portion 12, while the rotation of the inner and outer tubes around the longitudinal direction of the tubular base portion 12 is fixed. Then, by screwing in the set screw 38 from one end of the tubular base portion 12 to the opening of one of the legs 18 of the U-shaped presser body 14, the male threaded portion of the fastening screw is completely detached from the female threaded portion of the pipe sleeve, and even if the U-shaped presser body 14 becomes free, the set screw 38 can prevent the U-shaped presser body 14 from falling off the tubular base portion 12. In the case of medical stands for infusions, monitors, lighting, etc., casters are usually attached to the bottom of the inner and outer tubes and they are moved to many treatment sites. During this time, the unevenness of the floor causes the stand to vibrate up and down, so there is a high need to firmly fix the mating fixing parts of the inner and outer tubes, and there is a high need to adjust the direction of the infusions, monitors, and lighting during treatment. For these reasons, the fixing support jig of the present invention is more effective than music stands, which are usually transported to performance sites and there is little need to adjust the height and direction of the music stand, microphone, amplifier, etc. during performance.

[0030] As a modified example, as shown in FIG. 18, the inner and outer tubes X1 and X2 can be fixed and held even when the inner tube X1 is removed from the outer tube X2. More specifically, the pressing end face 20 of one leg portion 18 of the pressing body 14 is pressed against the outer peripheral surface 13 of the inner tube X1, and the pressing end face 20 of the other leg portion 18 is pressed against the outer peripheral surface of the outer tube X2, and there is no need to directly fix and hold the inner and outer tubes X2 through the fitting portion of the inner and outer tubes X2; it is sufficient to indirectly fix and hold the inner and outer tubes X1, X2 via the tubular base portion 12, so it is possible to fix and hold the inner and outer tubes X1, X2 in a state where 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, X2 is long.

[0031] According to the fixing support jig 10 having the above-mentioned configuration, in the inner pipe and outer pipe that both extend in the vertical direction and are fitted together, a tubular base portion having a pair of through holes on its outer surface, sandwiching a female thread portion, is attached to the outer surface of one end of the outer pipe, and one leg portion of the pressing body 14 having a generally U-shaped vertical cross section extends from one end of the outer pipe toward the outer pipe, and passes through one of the through holes provided in a first external fitting portion that is fitted onto the inner pipe with its inner surface facing the outer surface of the inner pipe with a first predetermined clearance. One leg extends from one end of the outer tube toward the inner tube, and the other leg is inserted through the other through-hole provided in a second external fitting part that fits externally onto the outer tube, with the inner peripheral surface facing the outer peripheral surface of the outer tube with a second predetermined clearance, and the male thread part of the fastening screw part is screwed into the female thread part, thereby making it possible to press the pair of pressing bodies against the pressing load receiving parts, and when a weight is to be supported by 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 weight, and then the fastening screw part is fastened to the load receiving part. the outer circumferential surface of the inner tube opposite the surface-to-surface contact of the pressing end face with the inner tube is pressed and fixed against the inner circumferential surface of the outer tube or the tubular base, and the other of the pair of legs is passed through the through hole of the second outer fitting portion so that the corresponding pressing end face is in surface contact with the outer circumferential surface of the outer tube, and the tubular base attached to one end of the outer tube is free to rotate about the longitudinal direction of the inner and outer tubes until it is screwed in by the fastening screw portion, and screwing in the fastening screw portion fixes this rotation of the tubular base and enables the inner and outer tubes to be fixed in place in the longitudinal direction of the inner and outer tubes. When such a fixing support jig is applied to a music stand or a medical stand, the simple structure makes it possible to improve usability when adjusting the stand height.

[0032] A second embodiment of the present invention will be described below. In the following description, components similar to those in the first embodiment are designated by similar reference numerals and description thereof will be omitted. Below, the characteristic features of this embodiment will be described in detail with reference to Figures 9 and 10. The second embodiment of the present invention is characterized in that when a male thread portion is provided near the upper end of the outer tube X2, one pressing end face of the U-shaped pressing body has a surface shape that closely contacts the male thread portion. More specifically, when a male screw portion is provided in a spiral shape with a predetermined pitch near the upper end of the outer tube X2, a female screw portion having a shape complementary to the spiral with the predetermined pitch is provided on one pressing end surface of the U-shaped pressing body, thereby making it possible to reliably prevent the tubular sleeve portion 12 from coming off the outer tube X2 upward via one pressing end surface of the U-shaped pressing body. In particular, when the outer tube X2 of an existing music stand has a male thread, more specifically, when the inner and outer tubes X1 and X2 are fixed together not by screwing them from the side as described above, but by screwing a sleeve having a female thread that can be threaded onto the male thread on the outer surface of the outer tube X2 in the longitudinal direction of the inner and outer tubes X1 and X2, thereby tightening and fixing the entire inner surface of the outer tube X2 to the entire outer surface of the inner tube X1, a tubular base 12 can be prepared that has a female thread that can be threaded onto the male thread within a predetermined range of its inner surface.In this case, rather than placing the annular shoulder 17 of the tubular base 12 of the fixing support jig on the upper peripheral end of the outer tube X2 as described above, the tubular base 12 can be allowed to rotate freely around the longitudinal direction of the inner and outer tubes X1 and X2 with the female thread of the tubular base 12 threaded onto the male thread of the outer tube 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 are given the same reference numerals and their description will be omitted. Below, the characteristic features of this embodiment will be described in detail with reference to Figures 16 and 17. The present 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 fixed and held together by pressing the pressing end face 20 against the outer peripheral surface 13 of the inner tube X1 with a fastening screw through a through slit in the tubular base portion 12. However, while the first embodiment uses the pressing end faces 20 of both legs 18 of a single U-shaped pressing body 14, this embodiment is characterized in that an L-shaped pressing body 14 is used.

[0034] 17, the L-shaped pressing body 14 has only one leg 18 that can pass through the through slit of the tubular base 12, while the other leg 18 in the first embodiment does not have a through slit in the tubular base 12 and serves as an abutting portion 60 with an abutting surface 62 at its end that abuts against the outer peripheral surface 21 of the tubular base 12. The length of the abutting portion 60 is set so that the pressing end surface 20 of the one leg 18 can be pressed against the outer peripheral 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 can rotate 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. By tightening the fastening screw 16, the pressing end face 20 of one leg portion 18 is pressed against the outer peripheral surface 13 of the inner tube X1, and on the side opposite to the pressing end face 20 of one leg portion 18, the outer peripheral surface 13 of the inner tube X1 is pressed against the inner peripheral surface of the tubular base portion 12. At the mating portion of the inner and outer tubes X1 and X2, the outer peripheral surface 13 of the opposite inner tube X1 is pressed against the inner peripheral surface of the outer tube X2, thereby fixing and holding the inner and outer tubes X1 and X2 together. For example, this embodiment can be effectively applied when used as a music stand such as a music stand or microphone stand, and when adjusting the height of the music stand or microphone, the length of the fitting portion of the inner and outer tubes X1 and X2 is adjusted within the range in which the inner and outer tubes X1 and X2 are fitted together. In addition, when the upper surface 22 of the L-shaped pressing body 14 is pressed toward the outer surface 13 of the inner tube X1 parallel to the outer surface 21 of the tubular base portion 12 by the fastening screw portion 16, the abutment portion 60 may be omitted and the L-shaped pressing body 14 may be a complete L-shaped pressing body without the other leg portion 18.

[0035] 16, two L-shaped pressing bodies 14 may be stacked instead of 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 the longitudinal direction, with a clearance hole provided in the horizontal portion and legs 18 formed at the orthogonal portions, and pressing end faces 20 provided at the tips. The two L-shaped pressing bodies 14 are arranged with their horizontal portions stacked on top of each other so that one horizontal portion extends toward the other orthogonal portion, and therefore the length l of the horizontal portion is set so that it abuts against the inner surface of the other orthogonal portion. Unlike the first embodiment, the two L-shaped pressing bodies 14 can be moved and adjusted independently of each other within the corresponding through slits, but since they can be separated by removing and attaching the fastening screws, each L-shaped pressing body 14 is provided with a set screw and a corresponding through hole.

[0036] As a result, by passing the male threaded portion of the fastening screw through the clearance holes of the upper L-shaped pressing body 14 and the lower L-shaped pressing body 14 and tightening it into the female threaded portion of the tubular base portion 12, the pressing end face 20 of the upper L-shaped pressing body 14 is pressed against the outer peripheral surface of the outer tube X2, and the pressing end face 20 of the lower L-shaped pressing body 14 is pressed against the outer peripheral surface 13 of the inner tube X1, and the inner and outer tubes X1 and X2 can be fixed and held together in a manner similar to the first embodiment.

[0037] For example, in the first embodiment, the inner and outer tubes X1 and X2 are both circular and have a constant cross section, and the tubular base portion 12 is placed on the annular end face EN of the outer tube X2, and the tubular base portion 12 is rotated to a desired angle position about the longitudinal direction of the tube, and the inner and outer tubes X1 and X2 are fixed and held together by the fastening screw portion 16 or the pressing lever 301 via the U-shaped or L-shaped pressing body 14 while fixing the rotation of the tubular base portion 12. However, the present invention is not limited to this. For example, the inner tube X1 has a constant circular cross section, In the case where the outer tube X2 has a rectangular shape, for example a square with a constant 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 the desired angular position around the longitudinal direction of the tube while floating above the inner tube X1, which has a circular cross section, without placing it on the annular end face EN of the outer tube X2, and the inner and outer tubes X1 and X2 can be fixed together while the rotation of the tubular base portion 12 is fixed.

[0038] A 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 features of this embodiment will be described in detail 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 in that it employs a pressing lever mechanism 300 instead of a fastening screw portion. Specifically, the annular peripheral surface 308 of the rotating portion is curved such that the radius from the axis increases from a first radius to a second radius, and 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 pressing lever 301 around an axis provided at a predetermined height from the outer peripheral surface 14 of the annular sleeve 12, the pressing bodies 34 begin to press against the outer peripheral surfaces 14 of the inner and outer tubes X1 and X2 at a rotation position corresponding to the intermediate radius between the first and second radii, and finish pressing against the outer peripheral surfaces 14 of the inner and outer tubes X1 and X2 at a rotation position corresponding to the second radius, so that the pressing end faces are in surface contact with the outer peripheral surfaces 14 of the inner and outer tubes X1 and X2, and the outer peripheral surfaces 14 of the inner and outer tubes X1 and X2 on the opposite side of the surface contact portion of the pressing end faces with the inner and outer tubes X1 and X2 are pressed and fixed against the inner peripheral 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 peripheral surface 14 of the inner and outer tubes X1 and X2, a pivot 302 that extends parallel to the tubular base portion 12 and 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 peripheral surface of the tubular base portion 12 (tubular base portion). The pressing lever 301 is an integrated structure with a roughly tadpole cross section, and includes a grip lever portion 303 that is gripped 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 provided at the center of the rotating portion 308. More specifically, the rotating portion 308 is provided with a notch 310 that separates it into opposing rotating portions, a pin 304 is positioned within the notch 310, and the pivot 302 that passes through the pin 304 passes through a through-hole with a circular cross section provided in each rotating portion, allowing each rotating portion, i.e., the pressing lever 301, to rotate around the pivot 302 between a non-pressing circumferential position and a pressing circumferential position. The pressing lever 301 may be made of resin from the viewpoint of lightweightness. The length of the arm from the center O of the pivot 302 of the grip lever portion 303 is preferably determined so that the pressing lever 301 can be pushed down sufficiently by hand using the principle of leverage. Each rotating portion has a curved peripheral 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 portions of the curved peripheral surface 312 is held in contact with the upper surface 33 of the pressing body 14, so that the rotation of the pressing lever 301 causes the pressing body 14 to move in the thickness direction of the tubular base portion 12 within the through slit 62.

[0040] The pin 304 has its lower end screwed to the outer circumferential surface 21 of the tubular base portion 12 so as to stand upright, and is provided with a through-hole (not shown) midway through which the pivot 302 can pass. According to the above configuration, by adjusting the amount of threading of the pin 304 into the tubular base portion 12, the height of the pivot 302 relative to the outer peripheral surface 21 of the tubular base portion 12 can be adjusted, and then the pressing lever 301 can be rotated around the pivot 302 from the non-pressing circumferential position to the pressing circumferential position, so that the pressing body 14 is pressed against the outer peripheral 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 a screw-type rotation by the fastening screw portion 16, by simply pressing the pressing lever 301 down from the non-pressing circumferential position to the pressing circumferential position with one touch, it is possible to fix and hold both the inner and outer tubes X1 and X2 while maintaining the pressing circumferential position of the pressing lever 301. Conversely, by simply pressing the pressing lever 301 up from the pressing circumferential position to the non-pressing circumferential position with one touch, the inner and outer tubes X1 and X2 can be moved relative to each other in the longitudinal direction.

[0041] As a modified example, the pin 304 and the pivot 302 may be integrally formed. That is, without providing a through-hole for the pivot 302 in the pin 304, the pivots 302 may be provided separately on the outer circumferential surface of the pin 304 from positions diametrically opposite each other and extending in opposite directions. If the height of the pivot 302 from the outer peripheral surface 21 of the tubular base portion 12 does not need to be adjusted, the lower end of the pin 304 may be fixed without being provided with a rotatable thread portion.

[0042] In this embodiment, a male screw portion 335 extending upward for a predetermined height is provided on the upper surface of the U-shaped pressing body 14, and a ring plate 314 having an opening in the center is provided on the inner surface of the opening with a female screw portion 337 that can be screwed into the male screw portion 335. More specifically, the ring plate 314 has an annular upper surface 315 and an annular lower surface 316, and a female thread portion 337 is provided across the gap 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 thread portion 335, and the diameter of the ring plate 314 must be set so that the curved peripheral surfaces 312 of both rotating portions are held in contact with the annular upper surface 315 of the ring plate 314. Thus, by adjusting the amount of threading of the female thread portion 337 of the ring plate 314 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, with which the curved peripheral surface 312 is held in contact, from the outer peripheral surface 21 of the tubular base portion 12 can be adjusted, and by rotating the pressing lever around the pivot 302, the amount of inward protrusion of the pair of pressing end surfaces of the U-shaped pressing body 14 from the inner peripheral surface of the tubular sleeve 12 toward the outer peripheral surface of the inner tube X1 can be adjusted, thereby adjusting the pressing force against the outer peripheral surface of the inner tube X1. A hollow sleeve 333 is fitted and fixed onto the outer peripheral surface 21 of the tubular base portion 12, and a pin 304 passes 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 periphery of the hollow sleeve 333. The cross section of the hollow sleeve 333 is non-circular, and its height from the outer peripheral surface 21 of the tubular base portion 12 is set to about 310, so that even if the pressing lever 301 tries to rotate around the pin 304, it hits the non-circular upper end of the hollow sleeve 333 and is unable to rotate. The tubular base portion 12 can be manufactured by machining, 3D printer modeling, or lost wax casting. In the case of 3D printer modeling or lost wax casting, the hollow sleeve 333 and the tubular base portion 12 can be processed 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 screwing may be adjusted according to the clearance between the inner peripheral surface of the sleeve and the outer peripheral surface of the inner tube, or the amount of screwing may be adjusted to increase the pressing force with the same clearance. From this viewpoint, it is advisable to set the screwing range, that is, the length of the male screw portion of the U-shaped pressing body. As described above, when the pressing lever is rotated around the pivot 302 to the pressing end circumferential position (FIG. 15), it is possible to adjust in advance the amount by which 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 manually. It is also possible to adjust the pressing force itself within the range in which the pressing lever can be rotated manually when the pressing lever is rotated around the pivot 302 to the pressing end circumferential position.

[0044] As shown in FIG. 15, 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 being set so that the pressing body 14 is pressed against the outer peripheral surfaces 14 of the inner and outer tubes X1 and X2 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 14 is sufficient to hold both the 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 should be about one-twentieth to one-tenth of that thickness. The curved circumferential surface 312 is set to smoothly change from R1 to R3, and in order to fix and hold the pressing lever 301 in 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 relative to the center O of the pivot shaft 302 from the curved circumferential surface portion corresponding to the pressing start circumferential position of the pressing lever 301, and to set it so that the central angle range gradually decreases from there. The entire curved circumferential surface 312 may be made up of a combination of multiple arc portions that are smoothly connected to each other, or it may be an ellipse whose major axis corresponds to R3. When the pressing lever 301 is positioned at the circumferential position where pressing starts, the grip lever portion 303 is oriented approximately upright so that it can be easily pressed down by hand, and when the pressing lever 301 is positioned at the circumferential position where pressing ends, the grip lever portion 303 is oriented close to the outer peripheral surface 21 of the tubular base portion 12 so that it does not protrude from the outer peripheral surface 21 of the tubular base portion 12 and get in the way, and the curved shape of the grip lever portion 303 is preferably determined so that space is formed between the inner surface of the grip lever portion 303 and the outer peripheral surface 21 of the tubular base portion 12 to fit a finger.

[0045] Even if the screw-in adjustment amount is large, the pressing lever 301 can be firmly fixed in the vertical direction relative to the male thread portion 310 when pressed down without changing the installation direction of the pressing lever 301.

[0046] A 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 features of this embodiment will be described in detail with reference to Figures 19 and 21. The characteristic 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 pressing end face 20 is pressed against the outer peripheral surface 13 of the inner tube X1 by the fastening screw 16, thereby fixedly holding the inner and outer tubes X1 and X2 together. However, while the first embodiment uses the pressing end faces 20 of both legs 18 of a single U-shaped pressing body 14, this embodiment is characterized in that a pair of L-shaped pressing bodies 14 are used.

[0047] More specifically, as shown in FIG. 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 the pressing load receiving surface 22 on its upper surface, and a vertical portion 332 that extends from one end of the horizontal portion 330 perpendicular to the pressing load receiving surface 22 in the opposite direction, the vertical portion 332 forming a leg portion, and the pressing end surface 20 is formed at the tip of the vertical portion 332. The L-shaped pressing body 14 has only one leg 18 that can pass through the through slit 32 of the tubular base 12, and the other end of the horizontal portion 330 is provided with an abutment portion 60 that has an abutment surface 62 at its end that abuts against the outer peripheral surface of the tubular base 12. The length of the abutment portion 60 is set so that the pressing end surface 20 of the one leg 18 can be pressed against the outer peripheral surface 13 of the inner tube X1. The horizontal portion 330 of each L-shaped pressing body 14 protrudes from the end face 40, 41 of the corresponding tubular base portion 12, and the vertical portion 332 faces toward the outer surface of the inner tube X1 or outer tube X2 on the inner tube X1 or outer tube X2 side of the corresponding end face 40, 41 of the tubular base portion 12. As a result, unlike the first embodiment, it is possible to omit the through slit 32 through which the leg portion passes in the tubular base portion 12. The length of the horizontal portion 330 of each L-shaped presser 14 is set so that the corresponding vertical portion 332 protrudes from the corresponding end face of the tubular base portion 12 . In addition, from the viewpoint of convenience when rotating the tubular base portion 12 to the desired rotation position around the longitudinal direction of the outer tubes X1 and X2, 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 a music stand is supported at the upper end of the inner tube X1, if the overall length of the inner tube X1 is short and the height of the music stand cannot be raised to the desired level, the length of the tubular base portion 12 can be set long and L-shaped pressing bodies 14 and fastening screw portions 16 can be provided near each end of the tubular base portion 12, which does not have the through slits 32.As in the first embodiment, the tubular base portion 12 can be rotated to the desired rotation position around the longitudinal direction of the outer tubes X1 and X2 until each fastening screw portion 16 is fastened.By fastening each fastening screw portion 16, the rotation of the tubular base portion 12 around 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 hold the inner and outer tubes X1 and X2 fixed to each other.

[0049] On the other hand, if the length of the tubular base portion 12 is short, an L-shaped pressing body 14 and a 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 a U-shaped pressing body 14 may be provided so as to straddle the tubular base portion 12, as shown in Figure 19.

[0050] It is also possible to set the fastening screw portion 16 or the pressing lever 301 independently for each L-shaped pressing body 14 of the tubular base portion 12, 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 are given the same reference numerals and their description will be omitted. Below, the characteristic features of this embodiment will be described in detail with reference to Figures 22 to 24. The characteristic 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 pressing end face 20 is pressed against the outer peripheral surface 13 of the inner tube X1 by the fastening screw 16, thereby fixing and holding the inner and outer tubes X1 and X2 together. However, whereas the first embodiment uses the pressing end faces 20 of both 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 is used, as in the fifth embodiment.

[0052] 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 peripheral surface of the inner tube X1, and the lower abutment surface 62 of the L-shaped pressing body 14 is pressed against the bottom surface of an annular groove 64 provided near and below the annular end surface EN of the outer tube X2. As a result, the outer peripheral surface of the inner tube X1 on the side opposite to the L-shaped pressing body 14 is pressed in line contact against the inner peripheral surface over the entire length of the tubular base portion 12, and the outer tube X2 is pressed in a manner that it is sandwiched between the lower abutment surface 62 of the L-shaped pressing body 14 and the outer peripheral surface of the tubular base portion 12, thereby fixing and holding the inner and outer tubes X1 and X2 together. Furthermore, since the lower abutment surface 62 of the L-shaped pressing body 14 fits into the bottom surface of the annular groove 64, it is possible to reliably prevent the tubular base portion 12 from slipping upward from the outer tube X2 via the L-shaped pressing body 14. However, by placing the annular shoulder portion 17 of the tubular base portion 12 on the annular end face EN of the outer tube X2, rotating it around the longitudinal direction of the inner and outer tubes X1, X2 to the desired rotation position, and tightening the fastening screw portion 16, it is possible to prevent the tubular base portion 12 from slipping upward from the outer tube X2, and the annular groove 64 may be omitted.

[0053] As described above, unlike the first embodiment, it is not necessary to provide a step on the inner peripheral surface of the tubular base portion 12 to provide an annular shoulder portion 17, but it is sufficient to provide an annular shoulder portion 17 on the outer peripheral surface of the tubular base portion 12. Unlike the first embodiment, the opposite side of the outer peripheral surface of the inner tube X1, which contacts the L-shaped pressing body 14, is not pressed against the inner peripheral surface of the outer tube X2, and the outer tube X2 is pressed in a manner such that it is sandwiched between the lower abutment surface 62 of the L-shaped pressing body 14 and the outer peripheral surface of the tubular base portion 12. Therefore, the outer tube X2 does not necessarily have to be made of a metal that can ensure strength against a pressing load, such as 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 preferable that the clearance C is approximately the same as the wall thickness of the outer tube X2, which is a few millimeters. The vertical positional relationship between the inner and outer tubes X1 and X2 does not need to be such that they overlap each other as shown in the figure, but rather the inner tube X1 is positioned so that the upper pressing end surface 20 of the L-shaped pressing body 14 can be pressed against the outer peripheral surface of the inner tube X1.

[0054] Although the embodiments of the present invention have 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 pipe X1, it was explained that the tip of the male thread portion 26 of the fastening screw portion 16 passes through the female thread portion 34 of the outer pipe X2 or the tubular base portion 12 so as not to come into contact with the outer surface of the inner pipe X1. However, this is not limited to this. When the inner and outer pipes 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 thread portion 26 of the fastening screw portion 16 comes into contact with the outer surface of the inner pipe X1, thereby making it possible to more firmly fix the position of the outer pipe X2 relative to the inner pipe X1, and this is effective for supporting a heavy object at a predetermined height by either the inner or outer pipe X1 when the inner and outer pipes X1 and X2 are oriented vertically.

[0055] For example, in the first embodiment, it was described that the tightening screw portion 16 has a male thread portion 26 and a head portion 28 that is gripped with the fingers and rotated, while a female thread portion 34 is provided on the outer peripheral surface 15 of the outer tube X2. However, without being limited to this, the tightening screw portion 16 may be in the form of a nut that screws onto the male thread portion 26 while the male thread portion 26 is provided on the outer peripheral surface 15 of the outer tube X2. For example, in the first embodiment, a single fixing support jig is provided at a predetermined position of the inner and outer tubes X1 and X2. However, the present invention 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 tubes X2, a plurality of pairs of such through slits 32 may be provided in the circumferential direction of the inner and outer tubes X1 and X2, and a plurality of pressing bodies may be provided accordingly. In each pressing body, it may be possible to select independently and individually which of the common fastening screw portion 16 and the pressing lever 301 is to be used as the pressing load applying portion that applies a pressing load to the pressing load receiving portion of the pressing body 14. [Brief explanation of the drawings]

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

[0057] D Head diameter F Music stand L1 Leg length L2 Leg length 10 Fixed support jig X1 inner tube X2 outer tube 12 Tubular base 13Outer surface 14 Pushing body 15 Outer surface 16 Fastening screw 17 Annular shoulder 18 Legs 19 Inner surface 20 Pressing end face 21Outer surface 22 Load-bearing surface 24 Stupid Hole 25 Protrusion 26 Male thread 28 One end 32 slit through hole 34 Female thread 36 Female thread 38 screw 40 peripheral surface 42 opening 60 contact part 62 contact surface 100 scoreboard stand 106 three-leg part 300 pressing lever mechanism 301 pressing lever 302 pivot 303 grip lever part 304 pin 308 rotating part 310 space 312 curved peripheral surface 314 ring plate 333 hollow sleeve 335 male screw part 337 female screw part

Claims

1. A fixing support jig is interposed between an inner tube and an outer tube, at least one of which has a circular cross section and both of which extend in the vertical direction and fit together, and which fixes and supports a heavy object at a predetermined height, a tubular base portion having a through hole on its outer circumferential surface, rotatable in the axial direction of the outer tube, and capable of being fitted onto the outer circumferential surface of one end of the outer tube; the tubular base portion comprises a first outer fitting portion extending from the one end toward the outer pipe and fitting onto the outer pipe with an inner circumferential surface facing the outer circumferential surface of the outer pipe with a first predetermined clearance, and a second outer fitting portion extending from the one end toward the inner pipe and fitting onto the inner pipe with an inner circumferential surface facing the outer circumferential surface of the inner pipe with a second predetermined clearance, a pressing body provided on the outside of the tubular base portion, the pressing body having 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 peripheral surface of the inner tube; a single pressure load applying portion that applies a pressure load to the pressure load receiving portion, a fixing support jig characterized in that, when a heavy object is supported by 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 then the single pressing load applying portion presses the pressing body toward the inner tube via the pressing load receiving surface through the through hole of the tubular base portion which is set at a desired rotational position centered on the longitudinal direction of the inner and outer tubes, thereby bringing the pressing end surface into surface contact with the outer peripheral surface of the inner tube, and simultaneously pressing and fixing the outer peripheral surface of the inner tube opposite to the surface contact portion of the pressing end surface with the inner tube against the inner peripheral surface of the outer tube or the inner peripheral surface of the tubular base.

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

3. the pressing end surface has a hardness sufficient to prevent deformation when pressed against the outer circumferential surface of the inner tube, The pressing end surface is formed to fit along the outer circumferential surface of the inner tube. The fixture support jig according to claim 1 .

4. 2. The fixing support jig according to claim 1, wherein the inner tube and the outer tube are each cylindrical, and the outer peripheral surface of the inner tube is pressed and fixed against the inner peripheral surface of the outer tube by pressing and fixing the outer peripheral surface of the inner tube opposite the pressing and fixing portion by the pressing end face against the inner peripheral surface of the outer tube in a line contact manner in the vertical direction, and the outer tube is fixed and supported against the inner tube by support at three points.

5. The tightening screw portion has a shank portion and the male screw portion extending downward from a lower surface of the shank portion, An annular surface is formed on the lower surface to surround the male thread portion, 2. The fixing support jig according to claim 1, wherein the male threaded portion is threadedly engaged with the female threaded portion through the clearance hole, thereby causing the lower surface of the shank portion to come into contact with the pressing load receiving surface of the pressing body, whereby the fastening threaded portion and the pressing body are integrally pressed and fixed to the inner pipe and screwed and fixed to the outer pipe.

6. 6. The fixing support jig according to claim 5, wherein the tightening screw portion has a head portion that can be held and turned by fingers at an end of the shank portion opposite to the end of the male screw portion.

7. The fixing support jig of claim 1, wherein the fixing support jig is made of metal, the pair of through holes are arranged at a predetermined interval from each other in the longitudinal direction of the inner and outer tubes, and extend circumferentially of the inner and outer tubes, respectively, and a heavy object is supported at a predetermined height by either the inner or outer tube.

8. 2. The fixing support jig according to claim 1, wherein the inner and outer tubes are fixed and held in a predetermined fitted position by fastening the fastening screw while preventing rotation of the tubular base.

9. The presser body on the side of the outer tube near the end of the fitting portion between the outer tube and the inner tube has an insertion hole formed in the thickness direction of the presser body from the side closest to the end of the outer tube out of a pair of opposing side surfaces constituting the presser body, and the end surface of the outer tube on the fitting portion side has a circular elongated hole having a circular opening on the end surface and extending through to the side surface on the side closest to the end of the outer tube, and the presser body further has an insertion rod insertable from the circular opening into the elongated hole, and by inserting the pair of presser bodies into the pair of through holes, the elongated hole communicates with the insertion hole, and by inserting the tip end of the insertion rod into the insertion hole, the pair of presser bodies are held in the pair of through holes, the elongated hole has a female screw portion, and the insertion rod is a set screw that can be screwed into the female screw portion of the elongated hole, and the tip end of the set screw threads into the insertion hole while screwing into the elongated hole.

2. The fixing support jig according to claim 1, wherein the pair of pressing bodies are detachably held in the pair of through holes by being inserted into the through holes.

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

11. A medical stand having the fixing support jig described in claim 1, wherein casters are provided at the end of the inner tube or the outer tube opposite the fitting portion of the inner and outer tube, making it movable, and wherein the end of the outer tube or the inner tube opposite the fitting portion of the inner and outer tube supports an IV drip, a monitor, and a light.

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