Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B50/00—Containers, covers, furniture or holders specially adapted for surgical or diagnostic appliances or instruments, e.g. sterile covers
  • A61B50/20—Holders specially adapted for surgical or diagnostic appliances or instruments
  • A61B50/24—Stands
  • A61B50/26—Stands floor-based
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
  • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
  • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
  • F16B7/10—Telescoping systems
  • F16B7/14—Telescoping systems locking in intermediate non-discrete positions
• • G—PHYSICS
  • G10—MUSICAL INSTRUMENTS; ACOUSTICS
  • G10G—REPRESENTATION OF MUSIC; RECORDING MUSIC IN NOTATION FORM; ACCESSORIES FOR MUSIC OR MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR, e.g. SUPPORTS
  • G10G5/00—Supports for musical instruments
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
  • H04R1/00—Details of transducers, loudspeakers or microphones

Definitions

• the present invention relates to a fixing support jig and a method for fixing and supporting inner and outer tubes. More specifically, it relates to a fixing support jig and a method for fixing and supporting inner and outer tubes that are suitable for use with music stands and have a simple structure that improves usability when adjusting the stand height.
• Patent Document 1 the inventor of the present application proposes a length adjustment jig that has a simple structure and can be easily operated to adjust the overall length of the inner and outer tubes.
• the length adjustment jig of the present invention is a length adjustment jig interposed between an inner tube and an outer tube that fit together.
• the outer surface of the outer tube has a pair of spaced-apart through slits, a female threaded portion between the pair of through slits, a pressing portion positioned on the outer surface of the outer tube, passing through the pair of through slits and contacting 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.
• 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 mating position of the inner tube relative to the outer tube. 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.
• each of the outer tubes has a female threaded portion provided on its outer surface, at least one through hole within a predetermined range from the female threaded portion, at least one pressing portion that passes through the through hole from the outer surface of the outer tube and abuts 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.
• the tip surface of the pressing portion is shaped to fit along the outer surface of the inner tube so that it can make surface contact with the outer surface of the inner tube, thereby allowing the mating position of the inner tube relative to the outer tube to be adjusted.
• the clamping screw After adjusting the length, the clamping screw has an opening facing the inner circumferential surface of the outer tube, and without providing a space to accommodate the pressing part that protrudes outside the outer tube, the male threaded part is threaded into the female threaded part on the outer circumferential surface of the outer tube by rotating the clamping screw, and by screwing in the clamping screw, the pressing part within a predetermined range is passed through the through hole from the female threaded part, and the tip surface is pressed and fixed in place against the outer circumferential surface of the inner tube in surface contact.
• This simple structure does not require excessive clamping force, and can be easily adjusted to hold the entire length of the inner and outer tubes in place.
• 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.
• 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.
• 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 tubular base portion having a through hole on an outer peripheral surface thereof and capable of being fitted onto the 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, a pressing body having a pressing end surface that can be pressed against the outer circumferential surface of the inner pipe; a pressure load applying portion that applies a
• 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 tubular base portion having an internal thread portion and a pair of through holes sandwiching the internal thread portion on its outer circumferential surface, the tubular base portion being attached and fixed to 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 tube and fitting onto the outer tube with an inner peripheral surface facing the outer peripheral surface of the outer tube with a first predetermined clearance, and a second outer fitting portion extending from the one end toward the inner tube and fitting onto the inner tube with an inner peripheral surface facing the outer peripheral surface of the inner tube with a second predetermined clearance, one of the pair of through holes being provided in the first outer fitting portion and the other of the pair of through holes
• a tubular base portion having a pair of through holes on its outer surface is attached to the outer surface of one end of the outer tube, sandwiching a female thread portion therebetween, and one leg of a pair of pressing bodies having a generally U-shaped longitudinal section is inserted through one of the through holes provided in a first external fitting portion that extends from one end of the outer tube toward the outer tube and fits onto the inner tube, the inner surface of which faces the outer surface of the inner tube with a first predetermined clearance, and
• the leg portion of the outer tube extends from one end of the outer tube toward the inner tube, and the inner peripheral surface of the second external fitting portion is fitted onto the outer tube with a second predetermined clearance, and the male threaded portion of the fastening screw portion is screwed into the female threaded portion, thereby making it possible to press the pair of pressing bodies against the pressing load receiving portions of the pressing body.
• 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 fastening screw portion is fastened to the load receiving portion.
• the outer circumferential surface of the inner tube opposite the surface-to-surface contact of the pressing end surface 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 inserted through the through hole of the second outer fitting portion so that the corresponding pressing end surface is in surface contact with the outer circumferential surface of the outer tube.
• the tubular base attached to the outer circumferential surface of one end of the outer tube is free to rotate about the longitudinal direction of the inner and outer tubes. Screwing in the fastening threads prevents the tubular base from rotating and enables the inner and outer tubes to be fixed in place in the longitudinal direction.
• This type of fixing support jig can be used in music stands and medical stands, and its simple structure improves usability when adjusting the stand height.
• a male thread when provided on the one end of the outer tube, a female thread that can be threaded onto the male thread may be provided on the inner peripheral surface of the tubular base portion.
• the other pressing end surface preferably has a complementary shape so as to fit closely to the threaded portion of the outer tube.
• a leg portion is provided at each end of the pressure load receiving portion, the leg portion extending in a direction opposite to the pressure load receiving surface, The leg portion has the pressing end surface at its tip, The length from the pressing load receiving surface to the pressing end surface of each leg portion may be set in accordance with the first predetermined clearance and the second predetermined clearance.
• each leg portion is preferably set so that the pressing end surface contacts each outer peripheral surface simultaneously when the fastening screws are tightened.
• the diameter of the second outer fitting portion is set smaller than the diameter of the first outer fitting portion, and that an annular shoulder portion is formed at the connection portion between the first outer fitting portion and the second outer fitting portion, and that the annular shoulder portion is placed on one circumferential end of the outer tube.
• the pressing end surface has a hardness sufficient to prevent deformation due to pressing 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.
• each of the inner tube and the outer tube is cylindrical, and 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 the outer tube is fixed and supported to the inner tube by support at three points.
• 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,
• 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 the end of the male screw portion.
• 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.
• the difference between the length of one of the legs and the length of the other of the legs is set in accordance with the thickness of the outer tube and the difference between the first predetermined clearance and the second predetermined clearance.
• an insertion hole is provided in the thickness direction of the pressing body from the side closest to the end of the outer tube out of a pair of opposing side surfaces constituting the pressing body, the end surface of the outer tube on the fitting portion side has a circular opening on the end surface and a narrow hole with a circular cross section that extends all the way through to the side surface on the side closest to the end of the outer tube, there is further an insertion rod that can be inserted into the narrow hole from the circular opening, and the pair of pressing bodies are inserted into the pair of through holes.
• the elongated holes communicate with the insertion holes, and the tip ends of the insertion rods are inserted into the insertion holes, thereby holding the pair of pressing bodies within the pair of through holes;
• the elongated holes have female threads;
• the insertion rods are set screws that can be threaded into the female threads of the elongated holes; and as the set screws are threaded into the elongated holes, the tip ends are inserted into the insertion holes, thereby holding the pair of pressing bodies removably within the pair of through holes.
• the music stand of the present invention comprises:
• the fixing support jig is as described in claim 1 or claim 2, and is configured to support a music stand, musical instrument, microphone, or amplifier at the end of the inner tube or the outer tube opposite the fitting portion of the inner and outer tubes.
• the medical stand of the present invention comprises:
• the fixing support jig according to claim 1 or claim 2 is provided with casters 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 is configured to support an IV drip, a monitor, and lighting at the end of the outer tube or the inner tube opposite the fitting portion of the inner and outer tube.
• the method for fixing and supporting an inner and outer tube of the present invention comprises the steps of: a step of fitting a tubular base having a circular inner circumferential surface on an upper end of the outer tube; fitting the inner tube into the tubular base or outer tube; rotating the tubular base to a desired rotational position about the longitudinal axis of the outer tube; a step of pressing the tubular base from the outside toward the outer peripheral surface of the inner tube in the thickness direction of the tubular base to fix the tubular base at a desired rotational position around the longitudinal direction of the outer tube, while pressing the outer peripheral surface of the opposite side of the inner tube against the inner peripheral surface of the tubular base or the outer tube, thereby fixing and holding the inner and outer tubes together in the longitudinal direction;
• the configuration has the following.
• the inner peripheral surface of the tubular base is provided with a reduced diameter portion having a diameter larger than that of the inner tube and an expanded diameter portion having a diameter larger than that of the outer tube, and an annular shoulder portion is formed at a connecting portion between the reduced diameter portion and the expanded diameter portion,
• the annular shoulder is preferably placed on the annular upper end surface of the outer tube, and the tubular base is rotated to a desired rotational position about the longitudinal axis of the outer tube.
• 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 generally 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 capable of pressing against the outer peripheral surface 13 of the inner pipe X1, and a tightening screw portion 16 capable of pressing and fixing the pressing body 14 against the outer peripheral surface 13 of the inner pipe X1.
• 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.
• each of the inner pipe X1 and the outer pipe X2 is hollow cylindrical, and the inner peripheral surface 17 of the outer pipe X2 is inserted from one end opening into one end opening of the outer peripheral surface 13 of the inner pipe X1, so that the outer pipe X2 fits onto the inner pipe X1.
• the outer pipe X2 needs to be hollow, but does not necessarily need to have a circular cross section, while the inner pipe X1 does not need to be hollow and may be solid, for example, from the viewpoint of ensuring strength.
• 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 may 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 peripheral surface 21 of the tubular base portion 12, and a female screw portion 34 provided between the pair of through slits 32.
• 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 circumferential surface set to be at least larger than the inner diameters of the inner tube X1 and the outer tube X2.
• 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 the 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.
• the tubular base portion 12 is composed of a first outer fitting portion extending from one end toward the outer tube X2 and fitting around 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 around 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 a 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
• the first outer fitting portion constitutes an expanded-diameter portion.
• An annular shoulder 17 is formed at the connection between the first and second outer fitting portions, and the annular shoulder 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.
• 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 at a predetermined interval from each other in the longitudinal direction of the inner and outer tubes X1 and 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.
• 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 peripheral surface 16 of the outer tube X2 in an interference fit manner, and a clearance is allowed between the periphery of the through slits 32 and the outer peripheral edge of the pressing body 14, in particular the leg portion 18 (explained later).
• 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 generally U-shaped cross section, which has a clearance hole 24 penetrating in the thickness direction and two legs 18 extending 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 the 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.
• the pressing end surface 20 has an arc-shaped cross section with the same diameter.
• the pressing body 14 itself does not need to be rotated toward the outer circumferential surface 13 of the inner tube X1 and the outer circumferential surface 15 of the outer tube X2. Therefore, the pressing end surface 20 can be pressed against the outer circumferential surface 13 of the inner tube X1 and the outer circumferential surface 15 of the outer tube X2 with the arc-shaped cross section oriented to match the outer circumferential surface 13 of the inner tube X1 and the outer circumferential surface 15 of the outer tube X2. It is not necessary for each pressing end surface 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.
• 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 thread portion 26 extending downward from a lower surface 38 of the shank portion 36, the male thread portion 26 being able to be threaded into the female thread portion 34, and an annular surface 40 surrounding the male thread portion 26 is formed on the lower surface 38.
• 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 little force and rotated with fingers, and from the standpoint of preventing slippage, it may be provided with a plurality of shallow grooves spaced apart in the circumferential direction.
• 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 load is supported at a predetermined height by either the inner or outer tube X1 or X2.
• the fixing support jig 10 when used to adjust the fitting length of the inner and outer tubes X1, X2 extending in the vertical direction to fix and hold a heavy object at a predetermined height, 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 of the fastening screw portion 16, and for this reason, the pressing body 14, fastening screw portion 16, and inner and outer tubes X1, X2 that constitute the fixing support jig 10 are required to have strength sufficient to withstand such a large tightening force. Therefore, it is preferable that they are made of metal.
• 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.
• 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.
• 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 rotation position around the longitudinal direction of the outer tube X2.
• the fixing support jig 10 is applied to an existing music stand stand 100
• the inner and outer tubes fit together, with the music stand connected to the upper end of the inner tube X1 and a tripod part 106 connected to the lower end of the outer tube X2, which holds 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.
• 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.
• 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, 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 is fitted 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.
• the tubular base portion 12 is rotated with the other hand around 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.
• 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.
• 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 about the longitudinal direction of the inner and outer tubes X1, X2 until it is screwed in by 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.
• 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.
• the fastening screw 16 is loosened, the fitting position of the inner tube X1 relative to the outer tube X2 is adjusted, and then the fastening screw 16 is fastened again.
• the inner tube X1 falls by its own weight when 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.
• the existing screws can also be used for the fixing support jig, they may be used as they are without preparing new screws.
• the tubular base portion 12 can freely rotate around the longitudinal direction of the inner and outer tubes X1. Therefore, 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.
• 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 diametrical 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 diametrical 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.
• 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 about the longitudinal direction of the inner and outer tubes X1 is fixed.
• 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.
• U-shaped pressing body 14 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.
• 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 against the inner surface of the outer tube X1 in line contact 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 to each other 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.
• the inner and outer tubes are fixed together via the tubular base portion 12, and 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.
• 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.
• 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 portions 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 are no fitting portions of the inner and outer tubes X2, in other words, when the overall lengths of the inner and outer tubes X1, X2 are long.
• 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, the inner peripheral surface of which faces the outer peripheral surface of the outer tube with a second predetermined clearance, and the male threaded part of the fastening screw part is screwed into the female threaded 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 load receiving part is fastened to the inner or outer tube by the fastening screw part.
• the outer circumferential surface of the inner tube opposite the surface-to-surface contact of the pressing end surface 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 inserted through the through hole of the second outer fitting portion so that the corresponding pressing end surface is in surface contact with the outer circumferential surface of the outer tube.
• the tubular base attached to the outer circumferential surface of one end of the outer tube is free to rotate about the longitudinal direction of the inner and outer tubes. Screwing in the fastening threads prevents the tubular base from rotating and enables the inner and outer tubes to be fixed in place in the longitudinal direction.
• This type of fixing support jig can be used in music stands and medical stands, and its simple structure improves usability when adjusting the stand height.
• 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 is formed into a surface shape that closely contacts the male thread portion.
• a female thread 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 slipping out upward from the outer tube X2 via one pressing end surface of the U-shaped pressing body.
• a tubular base 12 can be prepared having a female thread that can be threaded onto the male thread within a predetermined range on its inner surface.
• the tubular base 12 can be freely rotated around the longitudinal direction of the inner and outer tubes X1 and X2 with the female thread of the tubular base 12 threaded
• the second 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, X2 are fixedly held together by pressing the pressing end face 20 against the outer peripheral surface 13 of the inner tube X1 with a fastening screw via a through slit in the tubular base portion 12.
• 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.
• 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 abutment portion 60 with an abutment surface 62 at its end that abuts against the outer peripheral surface 21 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 width w of the annular shoulder 17 is set to the thickness of the outer tube X2, and the tubular base 12 can rotate about the longitudinal direction of the inner and outer tubes X1, X2 with the annular shoulder 17 placed on the annular end face EN of the outer tube X2.
• the pressing end face 20 of one leg 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 18, the outer peripheral surface 13 of the inner tube X1 is pressed against the inner peripheral surface of the tubular base 12.
• this embodiment can be effectively applied when the instrument is used as a music stand such as a music stand or a microphone stand, and when adjusting the height of the music stand or microphone, the length of the fitting portions 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.
• 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.
• each L-shaped pressing body 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 the horizontal portion of one extends toward the orthogonal portion of the other, and therefore the length l of the horizontal portion is set so that it abuts against the inner surface of the orthogonal portion of the other.
• each L-shaped pressing body 14 can be moved and adjusted independently of each other within the corresponding through slits, but since they can come apart by attaching or detaching the fastening screws, each L-shaped pressing body 14 is provided with a set screw and a corresponding through hole.
• the inner and outer tubes X1 and X2 are both circular, constant cross-sections, 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 the desired angular position around the longitudinal direction of the tube, and the inner and outer tubes X1 and X2 are fixed 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.
• the inner tube X1 has a circular, constant cross-section.
• 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 angle 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. Then, using the fastening screw portion 16 or pressing lever 301, the tubular base portion 12 can be placed at that height or on the annular end face EN of the outer tube X2, fixing the rotation of the tubular base portion 12 and holding the inner and outer tubes X1 and X2 in place.
• the fourth embodiment of the present invention is similar to the first embodiment in that it utilizes 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 as a replacement for the fastening screw portion.
• 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.
• the pressing bodies 34 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 rotational position corresponding to an intermediate radius between the first radius and the second radius, and finish pressing against the outer peripheral surfaces 14 of the inner and outer tubes X1 and X2 at a rotational 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.
• the pressing lever mechanism 300 includes a pressing lever 301 that presses the pressing body 14 against the outer peripheral surfaces 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 integrally constructed product having 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 the pivot 302, with the pivot 302 provided at the center of the rotating portion 308.
• 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.
• 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.
• a through-hole (not shown) midway through which the pivot 302 can pass.
• the pin 304 and the pivot 302 may be integrally formed. That is, 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, without providing a through-hole for the pivot 302 in the pin 304. 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.
• 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 has a female screw portion 337 on the inner surface of the opening that can be screwed onto the male screw portion 335.
• 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 needs to 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.
• 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 faces 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 processing. In the case of 3D printer modeling or lost wax processing, 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.
• 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.
• the distance between the center O of the pivot 302 and the lower end of the curved circumferential surface 312 is R1
• the distance between the center O of the pivot 302 and the lower end of the curved circumferential surface 312 is R2
• 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 circumferential 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 may be set so that the pressing force of the pressing body 14 is sufficient to fix and hold both the inner and outer tubes X1 and X2. 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 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 configured from a combination of multiple arc portions that are smoothly connected to each other, or may be an ellipse whose major axis corresponds to R3.
• the grip lever portion 303 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 allow a finger to be inserted.
• 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 orientation of the pressing lever 301.
• a fifth embodiment of the present invention will be described below.
• components similar to those in the first embodiment are designated by similar reference numerals and description thereof will be omitted.
• the characteristic features of this embodiment will be described in detail with reference to Figures 19 and 21.
• 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 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.
• the first embodiment uses the pressing end faces 20 of both legs 18 of a single U-shaped pressing body 14, the present embodiment is characterized in that a pair of L-shaped pressing bodies 14 are used.
• 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 on the upper surface that forms the pressing load receiving surface 22, 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 the 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.
• 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 the outer peripheral 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.
• 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 .
• 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.
• 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.
• 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.
• an 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 a U-shaped pressing body 14 may be provided so as to straddle the tubular base portion 12, as shown in Figure 19.
• 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.
• a sixth embodiment of the present invention will be described below.
• components similar to those in the first embodiment are designated by similar reference numerals and description thereof will be omitted.
• the characteristic features of this embodiment will be described in detail with reference to Figures 22 to 24.
• 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 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.
• 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 employed, as in the fifth embodiment.
• 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.
• 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 along 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, because the lower abutment surface 62 of the L-shaped pressing body 14 fits into the bottom surface of the annular groove 64, the L-shaped pressing body 14 can reliably prevent the tubular base portion 12 from slipping upward from the outer tube X2.
• the tubular base portion 12 can be prevented from slipping upward from the outer tube X2, and the annular groove 64 may be omitted.
• 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.
• 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 may be any appropriate value as long as the annular reduced diameter portion below the annular shoulder portion 17 of the tubular base portion 12 can be inserted.
• 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 face 20 of the L-shaped pressing body 14 can be pressed against the outer peripheral surface of the inner tube X1.
• 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.
• 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.
• the fastening screw portion 16 has a male thread portion 26 and a head portion 28 that is gripped with the fingers and rotated, while the female thread portion 34 is provided on the outer peripheral surface 15 of the outer tube X2.
• the male thread portion 26 may be provided on the outer peripheral surface 15 of the outer tube X2, while the fastening screw portion 16 may be in the form of a nut that screws onto the male thread portion 26.
• a single fixing support jig is provided at a predetermined position of the inner and outer tubes X1 and X2.
• the present invention is not limited to this.
• 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.
• FIG. 1 is an overall perspective view of a fixing support jig according to a first embodiment of the present invention
• FIG. 2 is an exploded perspective view of the fixing support jig according to the first embodiment of the present invention.
• 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.
• FIG. FIG. 2 is a perspective view of a pressing body of the fixing support jig according to the first embodiment of the present invention.
• 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.
• 1 is a side cross-sectional view of a fixing support jig according to a first embodiment of the present invention.
• FIG. 10 is a view corresponding to FIG. 2 of a fixing support jig according to a second embodiment of the present invention.
• FIG. 7 is a view corresponding to FIG. 6 of a fixing support jig according to a second embodiment of the present invention.
• 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;
• FIG. 10 is an exploded view of a fixing support jig according to a fourth embodiment of the present invention.
• FIG. 10 is a perspective view of a fixing support jig according to a fourth embodiment of the present invention.
• FIG. 10 is a cross-sectional view of a fixing support jig according to a fourth embodiment of the present invention.
• 10A and 10B are diagrams illustrating the operation of the fixing support jig according to the fourth embodiment of the present invention.
• FIG. 10 is a view corresponding to FIG. 2 of a modified example of the fixing support jig according to the first embodiment of the present invention.
• FIG. 10 is a view corresponding to FIG. 6 of a fixing support jig according to a third embodiment of the present invention.
• FIG. 10 is an exploded view of a fixing support jig according to a fourth embodiment of the present invention.
• FIG. 10 is a perspective view of a fixing support jig according to a fourth embodiment of the present
• FIG. 10 is a diagram of a fixing support jig according to a fifth embodiment of the present invention.
• FIG. 10 is a diagram of a fixing support jig according to a fifth embodiment of the present invention.
• FIG. 10 is a diagram of a fixing support jig according to a fifth embodiment of the present invention.
• FIG. 10 is a view corresponding to FIG. 2 of a fixing support jig according to a sixth embodiment of the present invention.
• FIG. 10 is a diagram of a fixing support jig according to a sixth embodiment of the present invention.
• FIG. 10 is a cross-sectional view of a fixing support jig according to a sixth embodiment of the present invention.

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