WO2019124541A1 - Leg body fixing device - Google Patents

Leg body fixing device Download PDF

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Publication number
WO2019124541A1
WO2019124541A1 PCT/JP2018/047203 JP2018047203W WO2019124541A1 WO 2019124541 A1 WO2019124541 A1 WO 2019124541A1 JP 2018047203 W JP2018047203 W JP 2018047203W WO 2019124541 A1 WO2019124541 A1 WO 2019124541A1
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WO
WIPO (PCT)
Prior art keywords
leg
bracket
top plate
lever
fixing device
Prior art date
Application number
PCT/JP2018/047203
Other languages
French (fr)
Japanese (ja)
Inventor
小島　守雄
Original Assignee
株式会社コジマ
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Publication date
Application filed by 株式会社コジマ filed Critical 株式会社コジマ
Publication of WO2019124541A1 publication Critical patent/WO2019124541A1/en

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    • 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
    • F16B12/00—Jointing of furniture or the like, e.g. hidden from exterior
    • F16B12/44—Leg joints; Corner joints
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B3/00—Folding or stowable tables
    • A47B3/08—Folding or stowable tables with legs pivoted to top or underframe

Definitions

  • the present invention relates to a collapsible table and, more particularly, to securing a hinged leg to a table top.
  • the table may be configured to be foldable, assuming that it will be stored when not in use.
  • the table having a structure in which the top is vertically folded has various functions according to the storage form, such as tilting one top and separating and tilting the top to face each other.
  • a table with a folded leg also has various functions such as folding one leg at a time, folding a plurality of legs together, etc.
  • top plate or the leg In a table having a foldable structure, it is important to fix the top plate or the leg in use. If the top or legs are unintentionally folded during use, not only are the articles placed on the top scattering, but there is a risk of injury to the user.
  • a table is disclosed in which a claw-shaped member is engaged with the step portion and the top plate is restrained in a horizontal posture (Patent Document 1). Further, as a mechanism for fixing a leg, a table is disclosed in which an engaging pin is engaged with a concave engaging portion provided on a rotating member interlocking with the leg to hold the leg in an upright state (patented Literature 2).
  • the structure in which the claw-like member or the pin-like member is locked to fix the top plate or the leg of the table has an advantage of less rattling at the time of opening, but the member tends to be damaged or deformed. Further, the shapes of the claw-like member and the member for engaging the pin are also complicated due to an increase in unevenness.
  • the spread state of the leg is maintained by the abutment of the cam that rotates in parallel with the leg and the member corresponding to the follower of the cam, and the leg is fixed to the top plate.
  • the cam portion has a small curvature surface
  • the leg bracket has a seat portion having a curved receiving surface whose curvature matches the small curvature surface.
  • the torsion coil spring is engaged with the top plate bracket and the lever, and the operation unit is the top plate by the elastic force of the torsion coil spring. It is characterized in that it is biased to rotate in the direction of the bracket.
  • the cam portion has a large curvature surface
  • the receiving portion of the leg bracket has a flat receiving surface
  • the large curvature surface is provided.
  • the leg bracket is in a state of being slightly opened from the right angle or right angle with respect to the top plate bracket, and the small curvature surface is in contact with the curved receiving surface.
  • the leg bracket is prevented from pivoting in the closing direction by the cam portion. Therefore, the leg bracket is maintained in the open state and fixed to the top plate bracket.
  • the periphery of the contact portion of the cam portion and the receiving portion can be formed as a curved surface having a flat or nearly flat radius of curvature, it is resistant to deformation or breakage.
  • the leg fixing device when the leg bracket is opened at a right angle with respect to the top plate bracket, the curved receiving surface tends to be separated from the small curvature surface. Also, the small curved surface is rotated following the curved receiving surface by the biasing force applied to the lever, and the leg bracket is inhibited from rotating in the closing direction by the cam portion.
  • the leg bracket is closed by rotating the lever and bringing the large curvature surface into contact with the flat receiving surface according to the configuration of claim 3 It is possible to turn to
  • FIG. 1 It is a perspective view which shows the state which attached the leg fixing device of 1st Example of this invention to the top plate and leg of a table. It is a schematic sectional drawing which shows the state which orthogonally opened the bracket for legs of the leg fixing device of 1st Example of this invention with respect to the bracket for top boards. It is a schematic sectional drawing which shows the state which piled the leg bracket of the leg fixing device of the 1st Example of this invention on the top plate bracket, and closed it. It is a perspective view of a state where a leg fixing device of a 1st example of the present invention is closed. It is a schematic sectional drawing which shows the state in which the bracket for legs of the leg fixing device of 1st Example of this invention exists in the middle of opening and closing.
  • FIG. 5 is an enlarged schematic cross-sectional view around a hinge axis of the leg fixing device of the first embodiment of the present invention, showing a state in which the leg bracket is opened at a right angle to the top plate bracket.
  • FIG. 5 is an enlarged schematic cross-sectional view around the hinge axis of the leg fixing device of the first embodiment of the present invention, showing a virtual state in which the leg bracket is slightly closed at a right angle to the top plate bracket.
  • FIG. 5 is an enlarged schematic cross-sectional view around a hinge axis of the leg fixing device of the first embodiment of the present invention, showing a state where the leg bracket is slightly opened at a right angle with respect to the top plate bracket.
  • FIG. 1 is a perspective view showing a leg fixing device 1 of the present invention attached to a table top 10 and a leg 20 of a table, wherein the leg 20 is in an open state with respect to the top 10.
  • the leg fixing device 1 includes a top plate bracket 100 and a leg bracket 200, and a hinge shaft 300 rotatably supporting the leg bracket 200 in a hinge shape with respect to the top plate bracket 100.
  • the top plate bracket 100 includes a plate-like back portion 110 fixed to the top plate 10, a piece portion 120 formed by hanging from the back portion 110, and a wall portion 130 formed by bending from the back portion 110.
  • the leg bracket 200 includes a plate-like back portion 210 fixed to the leg 20 and a wall portion 220 bent vertically from the back portion 210.
  • the hinge shaft 300 is inserted into a pin hole (not shown) provided in the wall portion 220 of the leg bracket 200 and a pin hole (not shown) provided in the one portion 120 of the top plate bracket 100. Both ends of the hinge shaft 300 are processed in a rivet shape so that the leg bracket 200 does not fall off the top plate bracket 100 fixed to the top plate 10.
  • FIG. 2 is a schematic cross-sectional view showing a state in which the leg bracket 200 of the leg fixing device 1 of the present invention is opened at a right angle to the top plate bracket 100.
  • the leg fixing device 1 includes a lever 400 that rotates in parallel with the leg bracket 200.
  • the lever 400 has a shaft portion 410 different from the hinge shaft 300, and the shaft portion 410 is inserted into a shaft hole different from the shaft hole for the hinge shaft 300 provided in the piece portion 120, and the top plate bracket
  • the lever 400 is rotatably supported relative to 100.
  • the lever 400 has an operating portion 420 and a cam portion 430 opposed to each other with the shaft portion 410 interposed therebetween.
  • the shaft portion 410 corresponds to a fulcrum
  • the operation portion 420 corresponds to a force point
  • the cam portion 430 corresponds to an action point.
  • a torsion coil spring 440 is attached between the top plate bracket 100 and the lever 400, and a coil portion of the torsion coil spring 440 (not shown) is inserted into the shaft portion 410.
  • One of the arm portions 441 of the torsion coil spring 440 of the present embodiment is engaged with the pedestal portion 140 of the top plate bracket 100, and the other is engaged with the operation portion 420.
  • the pedestal portion 140 is provided at a portion sandwiched by the piece portion 120.
  • the operating portion 420 is always urged by the elastic force of the torsion coil spring 440 to pivot in the direction of the back 110 of the top plate bracket 100.
  • the operation unit 420 of the present embodiment is formed in an annular shape, and is suitable for gripping by hand.
  • the operating portion 420 When the operating portion 420 is turned in the direction of the back portion 210 of the leg bracket 200 by gripping the operating portion 420, the operating portion 420 will return in the direction of the back portion 110 of the top plate bracket 100 by biasing of the torsion coil spring 440. Do.
  • the cam portion 430 is a thick cylindrical body having a cam surface curved on the entire side.
  • the cam surface of the cam portion 430 has a recess on the side facing the back 110 of the top plate bracket 100 and has a bulge on the side facing the back 210 of the leg bracket 200.
  • the cam portion 430 is formed with a tip surface 431 that enters the space between the hinge shaft 300 and the back 210 of the leg bracket 200.
  • a recessed surface 432 is formed in a concave shape so as not to interfere with the hinge shaft 300 from the distal end surface 431 to the back 110 side.
  • a small curved surface 433 with a small curvature is formed on the side close to the end surface 431 having a bulging shape from the end surface 431 to the back 210 side, and from the small curvature surface 433 from the small curvature surface 433 to the shaft 410 A large curvature surface 434 having a large curvature is formed.
  • the cam portion 430 abuts on the seat portion 230 of the leg bracket 200.
  • the leg bracket 200 when the leg bracket 200 is opened at a right angle to the top plate bracket 100, it is formed in an arc shape that is a small curvature surface 433 of the cam portion 430 and a part of the seat portion 230.
  • the curved receiving surface 231 abuts.
  • the curvature of the curved receiving surface 231 is formed to coincide with the curvature of the small curvature surface 433.
  • a slant receiving surface 232 is formed flat.
  • the oblique surface 232 has a role as a stopper for the small curved surface 433 so that the cam portion 430 does not rotate excessively.
  • FIG. 3 is a schematic cross-sectional view showing a state in which the leg bracket 200 of the leg fixing device 1 of the present invention is overlapped with the top plate bracket 100 and closed. Even when the leg bracket 200 is closed, the cam portion 430 abuts on the receiving portion 230 of the leg bracket 200. Specifically, the cam portion 430 receives a part of the large curvature surface 434 and the receiving portion 230. A flat receiving surface 233 formed on the side of the top plate 10 with respect to the surface 231 abuts. At this time, the lever 400 has elasticity such that the operation portion 420 tries to return in the direction of the top plate 10 by the torsion coil spring 440, but does not contribute to maintaining the leg bracket 200 in the closed state.
  • a plunger 500 is provided on the side of the top plate bracket 100 opposite to the hinge shaft 300. Further, a ball button 510 is provided at the tip of the leg bracket 200.
  • the structure of the plunger 500 will be described in detail with reference to FIG.
  • the cylindrical plunger 500 is fixed to the top plate bracket 100, and the inside 520 accommodates the pin 530, a spring 540 biased against the pin, and the adjusting screw 550.
  • the pin 530 includes a pin head 531 processed into a spherical shape, and a pin body 532 which is in contact with the spring 540 and processed to have a diameter larger than that of the pin head 531.
  • the ball button 510 has a hole portion 511 and a slope portion 512, and the hole bracket 511 is locked in a closed state by fitting the hole portion 511 and the pin head 531.
  • the sloped portion 512 abuts on the spherical pin head 531 before the leg bracket 200 is closed, and the spherical pin head 531 is spring 540 as the leg bracket 200 approaches the top plate bracket 100. Smoothly press-fit into the interior 520 against the bias of the
  • the spring 540 abuts the adjustment screw 550 on the opposite side of the pin 530.
  • the adjusting screw 550 is provided with a male screw 551 on the outer periphery, and screwed with a female screw 521 provided in the inside 520.
  • the strength of the spring 540 is adjusted. The greater the strength of the spring 540, the greater the force required to attach and detach the pin 530 and the ball button 510.
  • the top plate bracket 100 has a slit 160 formed therein, and the leg bracket 200 has a slit 260 formed thereon.
  • FIG. 4 is a perspective view of the leg fixing device 1 of the present invention in a closed state.
  • FIG. 5 is a schematic sectional view showing the leg bracket 200 of the leg fixing device 1 of the present invention in the middle of opening and closing.
  • the large curvature surface 434 of the cam portion 430 of the lever 400 has a constant diameter from the hinge shaft 300 when the recessed surface 432 of the cam portion 430 approaches the hinge shaft 300, and the flat support surface 233 from the hinge shaft 300.
  • the large curvature surface 434 abuts on the flat receiving surface 233 so as to correspond to the diameter up to the above.
  • the flat bracket 233 is pivoted while the flat receiving surface 233 slides on the large curvature surface 434. Therefore, in the state of FIG. 5, the rotation of the leg bracket 200 can be opened and closed in other words.
  • the leg bracket 200 Becomes unstable.
  • the operation unit 420 is rotated in the direction of the top 10 to bring the small curvature surface 433 and the curved receiving surface 231 into close contact.
  • FIG. 6 is an enlarged schematic cross-sectional view of the periphery of the hinge shaft 300 of the leg fixing device 1 of the present invention, in which the leg bracket 200 is opened at a right angle to the top plate bracket 100.
  • the small curvature surface 433 is in contact with the curved receiving surface 231
  • the leg 20 is in contact with the top plate 10
  • the leg bracket 200 is maintained in the open state.
  • FIG. 7 is an enlarged schematic cross-sectional view of the periphery of the hinge shaft 300 of the leg fixing device 1 of the present invention, and shows an imaginary state in which the leg bracket 200 is slightly closed at a right angle with respect to the top plate bracket 100.
  • FIG. 8 is an enlarged schematic cross-sectional view of the periphery of the hinge shaft 300 of the leg fixing device 1 of the present invention, showing the leg bracket 200 slightly open from a right angle with respect to the top plate bracket 100. Even if the leg bracket 200 is pivoted in a direction to open from a right angle, the leg 20 on which the leg bracket 200 is mounted abuts against the top plate 10 and the leg bracket 200 does not pivot. However, due to the deformation of the leg 20, the leg bracket 200 may open slightly from a right angle. The curved bearing surface 231 tries to separate from the small curvature surface 433 when the leg bracket 200 is slightly opened at a right angle without applying a force to the lever 400. At this time, the biasing force applied to the lever 400 by the torsion coil spring 440 causes the lever 400 to pivot in the direction opposite to the opening direction of the leg bracket 200 so that the small curvature surface 433 follows the curved receiving surface 231. .
  • the leg bracket 200 is slightly open from the right angle or right angle with respect to the top plate bracket 100, and the small curvature surface 433 is curved
  • the cam portion 430 inhibits the leg bracket 200 from pivoting in the closing direction. Therefore, the leg bracket 200 maintains the open state with respect to the top plate bracket 100 and is in a fixed state.
  • the periphery of the contact portion between the cam portion 430 and the seat portion 230 can be formed to be a flat surface or a curved surface having a radius of curvature close to a flat surface, so it is resistant to deformation or breakage.
  • the small curvature surface 433 of the cam portion 430 and the curved bearing surface 231 of the seat portion 230 Need to release the contact.
  • the operating portion 420 of the lever 400 is pivoted in the direction of the leg bracket 200 against the bias of the torsion coil spring 440, the small curvature surface 433 slides slightly away from the curved receiving surface 231.
  • the cam portion 430 corresponds to the action point of the lever 400
  • the operation portion 420 corresponds to the force point of the lever 400. Therefore, even when the small curvature surface 433 and the curved receiving surface 231 are in close contact with each other, the lever 400 is easily rotated by applying a force to the operation unit 420 in the direction of the leg 20, and the leg bracket 200 can be unlocked.
  • cam portion 430 of the lever 400 and the receiving portion 230 of the leg bracket 200 are thick and load-placing each other, high deformation resistance and ease of formation are required.
  • An example of a preferable material of the lever 400 and the seat portion 230 is aluminum die casting.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Furniture Connections (AREA)
  • Tables And Desks Characterized By Structural Shape (AREA)

Abstract

The purpose of the present invention is to provide a device which makes it possible to fix a leg body to a top plate while maintaining an open-leg state of the leg body, by means of abutment between a cam that pivots in parallel with the leg body and a member corresponding to the follower of the cam. A leg body fixing device 1 of the present invention is provided with: a top plate bracket 100; a leg bracket 200; a hinge shaft 300 which supports the leg bracket 200 pivotally in a hinged manner with respect to the top plate bracket 100; and a lever 400 which pivots in parallel with the leg bracket 200. The lever 400 includes a shaft portion 410 different from the hinge shaft 300, and an operating portion 420 and a cam portion 430 which oppose each other across the shaft portion 410. The cam portion 430 includes a small curvature surface 433. The leg bracket 200 includes a seat portion 230 having a curved receiving surface 231 with a curvature corresponding to that of the small curvature surface 433. When the small curvature surface 433 abuts against the curved receiving surface 231, the cam portion 430 maintains a stationary state and blocks pivoting in a direction in which the leg bracket 200 is closed.

Description

脚体固定装置Leg fixing device
　本発明は、折りたたみが可能なテーブルに関するものであって、詳しくは、テーブルの天板に蝶着した脚部の固定に関するものである。 The present invention relates to a collapsible table and, more particularly, to securing a hinged leg to a table top.
　テーブルは、不使用時に収納することを想定して、折りたたみが可能な構造にすることがある。天板を垂直にたたむ構造のテーブルは、１枚の天板を傾倒する、天板を分離して対向するように傾倒するなど、収納の形態に合わせた多様な機能を備える。一方、脚を折りたたむ構造のテーブルもまた、脚を１本ずつたたむ、複数の脚を連動してたたむなど、やはり多様な機能を備える。 The table may be configured to be foldable, assuming that it will be stored when not in use. The table having a structure in which the top is vertically folded has various functions according to the storage form, such as tilting one top and separating and tilting the top to face each other. On the other hand, a table with a folded leg also has various functions such as folding one leg at a time, folding a plurality of legs together, etc.
　折りたたみが可能な構造を備えるテーブルにおいては、使用時における天板または脚の固定が重要である。使用時に天板または脚が意図せず折り畳まれると、天板に載せた物品が散乱するのみならず、使用者が負傷する危険がある。 In a table having a foldable structure, it is important to fix the top plate or the leg in use. If the top or legs are unintentionally folded during use, not only are the articles placed on the top scattering, but there is a risk of injury to the user.
　天板を固定する機構としては、爪状の部材が段部に係止して天板が水平姿勢に拘束されるテーブルが開示されている（特許文献１）。また、脚を固定する機構としては、脚と連動する回動部材に設けられる凹形状の係合部に係合ピンを噛ませて、脚を起立状態に保持するテーブルが開示されている（特許文献２）。 As a mechanism for fixing the top plate, a table is disclosed in which a claw-shaped member is engaged with the step portion and the top plate is restrained in a horizontal posture (Patent Document 1). Further, as a mechanism for fixing a leg, a table is disclosed in which an engaging pin is engaged with a concave engaging portion provided on a rotating member interlocking with the leg to hold the leg in an upright state (patented Literature 2).
特開２００４－１８７８５１号公報JP, 2004-187851, A 特開平１０－１１７８５１号公報Unexamined-Japanese-Patent No. 10-117851
　テーブルの天板または脚の固定に爪状の部材やピン状の部材を係止させる構造では、開脚時のがたつきが少ないという利点はあるが、部材の破損や変形が生じやすい。また、爪状の部材や、ピンを係合させる部材の形状も凹凸が多くなって複雑化する。 The structure in which the claw-like member or the pin-like member is locked to fix the top plate or the leg of the table has an advantage of less rattling at the time of opening, but the member tends to be damaged or deformed. Further, the shapes of the claw-like member and the member for engaging the pin are also complicated due to an increase in unevenness.
　そこで、本発明は、脚体と平行に回動するカムと、当該カムの従節に相当する部材の当接によって、脚体の開脚状態を維持して、天板に対する脚体の固定を実現する装置を提供することを目的とする。 Therefore, according to the present invention, the spread state of the leg is maintained by the abutment of the cam that rotates in parallel with the leg and the member corresponding to the follower of the cam, and the leg is fixed to the top plate. An object of the present invention is to provide an apparatus to be realized.
　すなわち、本発明は前記した目的を達成せんとするもので、請求項１の手段は、本発明の脚体固定装置は、天板用ブラケットと、脚用ブラケットと、前記天板用ブラケットに対して前記脚用ブラケットを蝶番状に回動可能に支持するヒンジ軸と、前記脚用ブラケットと平行に回動するレバーと、を備え、前記レバーは前記ヒンジ軸とは異なる軸部と、前記軸部を挟んで対向する操作部とカム部を有し、前記カム部は小曲率面を有し、前記脚用ブラケットは前記小曲率面と曲率が一致する曲受面を有する受座部を有し、前記小曲率面が前記曲受面に当接するときは、前記脚用ブラケットが前記天板用ブラケットに対して閉じようとする外力に対して、前記カム部は静止した状態を維持することを特徴とする。 That is, the present invention is intended to achieve the above-mentioned object, and in the means of claim 1, the leg fixing device according to the present invention comprises the top plate bracket, the leg bracket, and the top plate bracket. Shaft for pivotally supporting the leg bracket in a hinge shape, and a lever for rotating in parallel with the leg bracket, the lever having a shaft different from the hinge shaft, and the shaft The cam portion has a small curvature surface, and the leg bracket has a seat portion having a curved receiving surface whose curvature matches the small curvature surface. When the small curvature surface abuts on the curved receiving surface, the cam portion remains stationary against an external force that causes the leg bracket to close with respect to the top plate bracket. It is characterized by
　また、請求項２の手段は、本発明の脚体固定装置は、ねじりコイルバネが前記天板用ブラケットと前記レバーに係止され、前記操作部は、前記ねじりコイルバネの弾性力によって、前記天板用ブラケットの方向に回動するための付勢を受けていることを特徴とする。 In the leg fixing device according to the present invention, the torsion coil spring is engaged with the top plate bracket and the lever, and the operation unit is the top plate by the elastic force of the torsion coil spring. It is characterized in that it is biased to rotate in the direction of the bracket.
　また、請求項３の手段は、本発明の脚体固定装置は、前記カム部は大曲率面を有し、前記脚用ブラケットの前記受座部は平受面を有し、前記大曲率面が前記平受面に当接するときは、前記平受面は前記大曲率面に対して摺動しながら前記脚用ブラケットが回動することを特徴とする。 In the leg fixing device according to the present invention, the cam portion has a large curvature surface, the receiving portion of the leg bracket has a flat receiving surface, and the large curvature surface is provided. When the flat bearing surface abuts on the flat bearing surface, the flat bracket rotates while the flat bearing surface slides on the large curvature surface.
　本発明の脚体固定装置は、請求項１の構成によって、脚用ブラケットが天板用ブラケットに対して直角または直角よりやや開いた状態であって、前記小曲率面が前記曲受面に当接するときは、前記カム部によって前記脚用ブラケットは閉じる方向への回動を阻害される。そのため、前記脚用ブラケットは、前記天板用ブラケットに対して開脚状態を維持し、かつ固定された状態となる。また、前記カム部および前記受座部の当接部位の周辺は、平坦あるいは平坦に近い曲率半径を有する曲面に形成可能であるため、変形や破損に強い。 In the leg fixing device of the present invention, according to the configuration of claim 1, the leg bracket is in a state of being slightly opened from the right angle or right angle with respect to the top plate bracket, and the small curvature surface is in contact with the curved receiving surface. When in contact, the leg bracket is prevented from pivoting in the closing direction by the cam portion. Therefore, the leg bracket is maintained in the open state and fixed to the top plate bracket. Further, since the periphery of the contact portion of the cam portion and the receiving portion can be formed as a curved surface having a flat or nearly flat radius of curvature, it is resistant to deformation or breakage.
　また、本発明の脚体固定装置は、請求項２の構成によって、前記脚用ブラケットが前記天板用ブラケットに対して直角より開くときは、前記曲受面が前記小曲率面から離隔しようとしても、前記レバーに与えられる付勢によって、前記小曲率面が前記曲受面に追随して回動し、前記カム部によって前記脚用ブラケットは閉じる方向への回動を阻害される。 In the leg fixing device according to the present invention, when the leg bracket is opened at a right angle with respect to the top plate bracket, the curved receiving surface tends to be separated from the small curvature surface. Also, the small curved surface is rotated following the curved receiving surface by the biasing force applied to the lever, and the leg bracket is inhibited from rotating in the closing direction by the cam portion.
　また、本発明の脚体固定装置は、請求項３の構成によって、前記レバーを回動して、前記大曲率面を前記平受面に当接させることによって、前記脚用ブラケットは、閉じる方向への回動が可能となる。 In the leg fixing device according to the present invention, the leg bracket is closed by rotating the lever and bringing the large curvature surface into contact with the flat receiving surface according to the configuration of claim 3 It is possible to turn to
本発明の第１の実施例の脚体固定装置をテーブルの天板および脚体に取り付けた状態を示す斜視図である。It is a perspective view which shows the state which attached the leg fixing device of 1st Example of this invention to the top plate and leg of a table. 本発明の第１の実施例の脚体固定装置の脚用ブラケットを天板用ブラケットに対して直角に開いた状態を示す概略断面図である。It is a schematic sectional drawing which shows the state which orthogonally opened the bracket for legs of the leg fixing device of 1st Example of this invention with respect to the bracket for top boards. 本発明の第１の実施例の脚体固定装置の脚用ブラケットを天板用ブラケットに重ね合わせて閉じた状態を示す概略断面図である。It is a schematic sectional drawing which shows the state which piled the leg bracket of the leg fixing device of the 1st Example of this invention on the top plate bracket, and closed it. 本発明の第１の実施例の脚体固定装置を閉じた状態の斜視図である。It is a perspective view of a state where a leg fixing device of a 1st example of the present invention is closed. 本発明の第１の実施例の脚体固定装置の脚用ブラケットが開閉の途中にある状態を示す概略断面図である。It is a schematic sectional drawing which shows the state in which the bracket for legs of the leg fixing device of 1st Example of this invention exists in the middle of opening and closing. 本発明の第１の実施例の脚体固定装置のヒンジ軸の周辺の拡大概略断面図であり、脚用ブラケットを天板用ブラケットに対して直角に開いた状態を示す。FIG. 5 is an enlarged schematic cross-sectional view around a hinge axis of the leg fixing device of the first embodiment of the present invention, showing a state in which the leg bracket is opened at a right angle to the top plate bracket. 本発明の第１の実施例の脚体固定装置のヒンジ軸の周辺の拡大概略断面図であり、脚用ブラケットを天板用ブラケットに対して直角よりやや閉じた仮想の状態を示す。FIG. 5 is an enlarged schematic cross-sectional view around the hinge axis of the leg fixing device of the first embodiment of the present invention, showing a virtual state in which the leg bracket is slightly closed at a right angle to the top plate bracket. 本発明の第１の実施例の脚体固定装置のヒンジ軸の周辺の拡大概略断面図であり、脚用ブラケットを天板用ブラケットに対して直角よりやや開いた状態を示す。FIG. 5 is an enlarged schematic cross-sectional view around a hinge axis of the leg fixing device of the first embodiment of the present invention, showing a state where the leg bracket is slightly opened at a right angle with respect to the top plate bracket.
　以下、図面を参照しながら、本発明について実施するための形態を説明する。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
　図１は、本発明の脚体固定装置１をテーブルの天板１０および脚体２０に取り付けた状態を示す斜視図であり、脚体２０は天板１０に対して開いた状態である。脚体固定装置１は、天板用ブラケット１００と脚用ブラケット２００と、天板用ブラケット１００に対して脚用ブラケット２００を蝶番状に回動可能に支持するヒンジ軸３００とを備える。 FIG. 1 is a perspective view showing a leg fixing device 1 of the present invention attached to a table top 10 and a leg 20 of a table, wherein the leg 20 is in an open state with respect to the top 10. The leg fixing device 1 includes a top plate bracket 100 and a leg bracket 200, and a hinge shaft 300 rotatably supporting the leg bracket 200 in a hinge shape with respect to the top plate bracket 100.
　天板用ブラケット１００は、天板１０に固定される板状の背部１１０と、背部１１０から垂下して形成される片部１２０および、背部１１０から屈曲して形成される壁部１３０と、を備える。また、脚用ブラケット２００は、脚体２０に固定される板状の背部２１０と、背部２１０から垂直に屈曲する壁部２２０と、を備える。 The top plate bracket 100 includes a plate-like back portion 110 fixed to the top plate 10, a piece portion 120 formed by hanging from the back portion 110, and a wall portion 130 formed by bending from the back portion 110. Prepare. Further, the leg bracket 200 includes a plate-like back portion 210 fixed to the leg 20 and a wall portion 220 bent vertically from the back portion 210.
　ヒンジ軸３００は、脚用ブラケット２００の壁部２２０に設けられた図示しないピン穴と、天板用ブラケット１００の片部１２０に設けられた図示しないピン穴に挿通される。ヒンジ軸３００は、天板１０に固定される天板用ブラケット１００から脚用ブラケット２００が脱落しないように、両端がリベット状に加工される。 The hinge shaft 300 is inserted into a pin hole (not shown) provided in the wall portion 220 of the leg bracket 200 and a pin hole (not shown) provided in the one portion 120 of the top plate bracket 100. Both ends of the hinge shaft 300 are processed in a rivet shape so that the leg bracket 200 does not fall off the top plate bracket 100 fixed to the top plate 10.
　図２は、本発明の脚体固定装置１の脚用ブラケット２００を天板用ブラケット１００に対して直角に開いた状態を示す概略断面図である。脚体固定装置１は、脚用ブラケット２００と平行に回動するレバー４００を備える。レバー４００はヒンジ軸３００とは異なる軸部４１０を有し、軸部４１０は、片部１２０に設けられたヒンジ軸３００のための軸穴とは別の軸穴に挿通され、天板用ブラケット１００に対してレバー４００を回動可能に支持する。また、レバー４００は軸部４１０を挟んで対向する操作部４２０とカム部４３０を有する。レバー４００は、軸部４１０が支点、操作部４２０が力点、カム部４３０が作用点にそれぞれ相当する。 FIG. 2 is a schematic cross-sectional view showing a state in which the leg bracket 200 of the leg fixing device 1 of the present invention is opened at a right angle to the top plate bracket 100. As shown in FIG. The leg fixing device 1 includes a lever 400 that rotates in parallel with the leg bracket 200. The lever 400 has a shaft portion 410 different from the hinge shaft 300, and the shaft portion 410 is inserted into a shaft hole different from the shaft hole for the hinge shaft 300 provided in the piece portion 120, and the top plate bracket The lever 400 is rotatably supported relative to 100. Further, the lever 400 has an operating portion 420 and a cam portion 430 opposed to each other with the shaft portion 410 interposed therebetween. In the lever 400, the shaft portion 410 corresponds to a fulcrum, the operation portion 420 corresponds to a force point, and the cam portion 430 corresponds to an action point.
　天板用ブラケット１００とレバー４００の間にはねじりコイルバネ４４０が取り付けられ、図示しないねじりコイルバネ４４０のコイル部は、軸部４１０に挿通される。本実施例のねじりコイルバネ４４０の腕部４４１は、一方が天板用ブラケット１００の台座部１４０に、他方が操作部４２０に係止される。台座部１４０は、片部１２０に挟まれた部分に設けられる。操作部４２０は、ねじりコイルバネ４４０の弾性力によって、常に天板用ブラケット１００の背部１１０の方向に回動するための付勢を受けている。 A torsion coil spring 440 is attached between the top plate bracket 100 and the lever 400, and a coil portion of the torsion coil spring 440 (not shown) is inserted into the shaft portion 410. One of the arm portions 441 of the torsion coil spring 440 of the present embodiment is engaged with the pedestal portion 140 of the top plate bracket 100, and the other is engaged with the operation portion 420. The pedestal portion 140 is provided at a portion sandwiched by the piece portion 120. The operating portion 420 is always urged by the elastic force of the torsion coil spring 440 to pivot in the direction of the back 110 of the top plate bracket 100.
　本実施例の操作部４２０は、環状に形成され、手で把持することに適している。操作部４２０を把持して脚用ブラケット２００の背部２１０の方向に操作部４２０を回動すると、ねじりコイルバネ４４０の付勢によって、操作部４２０は天板用ブラケット１００の背部１１０の方向に戻ろうとする。 The operation unit 420 of the present embodiment is formed in an annular shape, and is suitable for gripping by hand. When the operating portion 420 is turned in the direction of the back portion 210 of the leg bracket 200 by gripping the operating portion 420, the operating portion 420 will return in the direction of the back portion 110 of the top plate bracket 100 by biasing of the torsion coil spring 440. Do.
　カム部４３０は、全体的には側面に湾曲のあるカム面を有する肉厚な柱体である。カム部４３０のカム面は、天板用ブラケット１００の背部１１０に面した側に窪みがあり、脚用ブラケット２００の背部２１０に面した側に膨らみがある。詳しくは、カム部４３０は、ヒンジ軸３００と脚用ブラケット２００の背部２１０との空間に入り込む先端面４３１が形成される。また、先端面４３１から背部１１０の側には、ヒンジ軸３００と干渉しないように凹形状に窪面４３２が形成される。さらに、先端面４３１から背部２１０の側は膨らんだ形状を有し、先端面４３１に近い側は曲率が小さい小曲率面４３３が形成され、小曲率面４３３から軸部４１０にかけて小曲率面４３３より曲率が大きい大曲率面４３４が形成される。 The cam portion 430 is a thick cylindrical body having a cam surface curved on the entire side. The cam surface of the cam portion 430 has a recess on the side facing the back 110 of the top plate bracket 100 and has a bulge on the side facing the back 210 of the leg bracket 200. Specifically, the cam portion 430 is formed with a tip surface 431 that enters the space between the hinge shaft 300 and the back 210 of the leg bracket 200. Further, a recessed surface 432 is formed in a concave shape so as not to interfere with the hinge shaft 300 from the distal end surface 431 to the back 110 side. Furthermore, a small curved surface 433 with a small curvature is formed on the side close to the end surface 431 having a bulging shape from the end surface 431 to the back 210 side, and from the small curvature surface 433 from the small curvature surface 433 to the shaft 410 A large curvature surface 434 having a large curvature is formed.
　カム部４３０は、脚用ブラケット２００の受座部２３０に当接する。図２のように、脚用ブラケット２００が天板用ブラケット１００に対して直角に開いた状態においては、カム部４３０の小曲率面４３３と、受座部２３０の一部である弧状に形成された曲受面２３１が当接する。曲受面２３１の曲率は、小曲率面４３３の曲率と一致するように形成される。また、受座部２３０の曲受面２３１より脚体２０の先端側には平坦状に斜受面２３２が形成される。斜受面２３２は、カム部４３０が過剰に回動しないよう、小曲率面４３３に対するストッパーの役割を有する。 The cam portion 430 abuts on the seat portion 230 of the leg bracket 200. As shown in FIG. 2, when the leg bracket 200 is opened at a right angle to the top plate bracket 100, it is formed in an arc shape that is a small curvature surface 433 of the cam portion 430 and a part of the seat portion 230. The curved receiving surface 231 abuts. The curvature of the curved receiving surface 231 is formed to coincide with the curvature of the small curvature surface 433. Further, on the tip end side of the leg 20 from the curved receiving surface 231 of the receiving portion 230, a slant receiving surface 232 is formed flat. The oblique surface 232 has a role as a stopper for the small curved surface 433 so that the cam portion 430 does not rotate excessively.
　図３は、本発明の脚体固定装置１の脚用ブラケット２００を天板用ブラケット１００に重ね合わせて閉じた状態を示す概略断面図である。脚用ブラケット２００が閉じた状態においても、カム部４３０が脚用ブラケット２００の受座部２３０に当接し、具体的には、大曲率面４３４の一部と、受座部２３０のうち曲受面２３１より天板１０の側に形成された平受面２３３が当接する。このとき、レバー４００は、ねじりコイルバネ４４０によって操作部４２０が天板１０の方向に戻ろうとする弾性を有するが、脚用ブラケット２００が閉じた状態を維持することには寄与していない。 FIG. 3 is a schematic cross-sectional view showing a state in which the leg bracket 200 of the leg fixing device 1 of the present invention is overlapped with the top plate bracket 100 and closed. Even when the leg bracket 200 is closed, the cam portion 430 abuts on the receiving portion 230 of the leg bracket 200. Specifically, the cam portion 430 receives a part of the large curvature surface 434 and the receiving portion 230. A flat receiving surface 233 formed on the side of the top plate 10 with respect to the surface 231 abuts. At this time, the lever 400 has elasticity such that the operation portion 420 tries to return in the direction of the top plate 10 by the torsion coil spring 440, but does not contribute to maintaining the leg bracket 200 in the closed state.
　脚用ブラケット２００が閉じた状態を維持するために、天板用ブラケット１００のヒンジ軸３００の側とは反対側にプランジャー５００が設けられる。また、脚用ブラケット２００の先端に、ボールボタン５１０が設けられる。図３を用いて、プランジャー５００の構造を詳述する。筒状のプランジャー５００は天板用ブラケット１００に固定され、内部５２０に、ピン５３０と、ピンに付勢するスプリング５４０と、調整螺子５５０と、を収納する。ピン５３０は、球形状に加工されたピン頭部５３１と、スプリング５４０と当接しピン頭部５３１より径が大きく加工されたピン胴部５３２を備える。 In order to keep the leg bracket 200 closed, a plunger 500 is provided on the side of the top plate bracket 100 opposite to the hinge shaft 300. Further, a ball button 510 is provided at the tip of the leg bracket 200. The structure of the plunger 500 will be described in detail with reference to FIG. The cylindrical plunger 500 is fixed to the top plate bracket 100, and the inside 520 accommodates the pin 530, a spring 540 biased against the pin, and the adjusting screw 550. The pin 530 includes a pin head 531 processed into a spherical shape, and a pin body 532 which is in contact with the spring 540 and processed to have a diameter larger than that of the pin head 531.
　ボールボタン５１０は、穴部５１１と斜面部５１２を有し、穴部５１１とピン頭部５３１が嵌合することによって、脚用ブラケット２００が閉じた状態でロックされる。また、斜面部５１２は、脚用ブラケット２００が閉じる前から球形状のピン頭部５３１に当接し、脚用ブラケット２００が天板用ブラケット１００に近づくに従って、球形状のピン頭部５３１をスプリング５４０の付勢に抗して内部５２０に滑らかに圧入させる。 The ball button 510 has a hole portion 511 and a slope portion 512, and the hole bracket 511 is locked in a closed state by fitting the hole portion 511 and the pin head 531. The sloped portion 512 abuts on the spherical pin head 531 before the leg bracket 200 is closed, and the spherical pin head 531 is spring 540 as the leg bracket 200 approaches the top plate bracket 100. Smoothly press-fit into the interior 520 against the bias of the
　スプリング５４０は、ピン５３０の反対側が調整螺子５５０と当接する。調整螺子５５０は外周に雄螺子５５１が設けられ、内部５２０に設けられた雌螺子５２１と螺着する。調整螺子５５０を回転させることによって、スプリング５４０の強度が調整される。スプリング５４０の強度が大きいほど、ピン５３０とボールボタン５１０の着脱に大きな力を必要とする。 The spring 540 abuts the adjustment screw 550 on the opposite side of the pin 530. The adjusting screw 550 is provided with a male screw 551 on the outer periphery, and screwed with a female screw 521 provided in the inside 520. By rotating the adjustment screw 550, the strength of the spring 540 is adjusted. The greater the strength of the spring 540, the greater the force required to attach and detach the pin 530 and the ball button 510.
　天板用ブラケット１００はスリット１６０が形成され、脚用ブラケット２００はスリット２６０が形成される。図４は、本発明の脚体固定装置１を閉じた状態の斜視図である。スリット１６０およびスリット２６０の空間があることによって、レバー４００の力点となる操作部４２０を、天板１０および脚体２０に接するまで大きく形成することができる。また、操作部４２０を大きく形成することによって、小さい力でカム部４３０に大きい力を伝達することが容易になる。 The top plate bracket 100 has a slit 160 formed therein, and the leg bracket 200 has a slit 260 formed thereon. FIG. 4 is a perspective view of the leg fixing device 1 of the present invention in a closed state. By providing the space between the slit 160 and the slit 260, the operation portion 420 serving as the force point of the lever 400 can be formed large until it contacts the top plate 10 and the leg 20. Further, by forming the operation portion 420 large, it becomes easy to transmit a large force to the cam portion 430 with a small force.
　図５は、本発明の脚体固定装置１の脚用ブラケット２００が開閉の途中にある状態を示す概略断面図である。レバー４００のカム部４３０の大曲率面４３４は、カム部４３０の窪面４３２がヒンジ軸３００に近接したときに、ヒンジ軸３００からの径が一定となり、かつ、ヒンジ軸３００から平受面２３３までの径と一致するように形成され、大曲率面４３４が平受面２３３に当接する。このとき、平受面２３３は大曲率面４３４に対して摺動しながら脚用ブラケット２００が回動する。よって、図５の状態においては、脚用ブラケット２００の回動が、換言すれば、開閉が可能である。また、このとき、仮にレバー４００の操作部４２０を天板１０の方向に回動させようとすると、レバー４００の軸部４１０はヒンジ軸３００と一致しないため、ヒンジ軸３００から大曲率面４３４と平受面２３３とが当接する部分の距離が増大することになる。そのため、図５の状態において、ねじりコイルバネ４４０の付勢があっても、また、外力によっても、レバー４００が天板１０の方向に回動することはない。 FIG. 5 is a schematic sectional view showing the leg bracket 200 of the leg fixing device 1 of the present invention in the middle of opening and closing. The large curvature surface 434 of the cam portion 430 of the lever 400 has a constant diameter from the hinge shaft 300 when the recessed surface 432 of the cam portion 430 approaches the hinge shaft 300, and the flat support surface 233 from the hinge shaft 300. The large curvature surface 434 abuts on the flat receiving surface 233 so as to correspond to the diameter up to the above. At this time, the flat bracket 233 is pivoted while the flat receiving surface 233 slides on the large curvature surface 434. Therefore, in the state of FIG. 5, the rotation of the leg bracket 200 can be opened and closed in other words. At this time, if it is attempted to turn the operating portion 420 of the lever 400 in the direction of the top plate 10, the shaft portion 410 of the lever 400 does not coincide with the hinge shaft 300. The distance between the flat bearing surface 233 and the portion in contact with the flat bearing surface 233 is increased. Therefore, in the state of FIG. 5, even if the torsion coil spring 440 is biased, the lever 400 does not rotate in the direction of the top plate 10 even by an external force.
　脚用ブラケット２００が開閉の途中にある状態から脚用ブラケット２００をさらに開くと、カム部４３０と受座部２３０が当接する部位は、平受面２３３から曲受面２３１の方向に移動する。脚用ブラケット２００は天板用ブラケット１００に対して直角または略直角となったとき、当該当接部位が平受面２３３と曲受面２３１の境界に達し、カム部４３０と受座部２３０が離隔する。このとき、ねじりコイルバネ４４０の付勢を有するレバー４００は、軸部４１０を中心として回動し、カム部４３０の小曲率面４３３が曲受面２３１と当接する。小曲率面４３３と曲受面２３１の間に摩擦が生じて、図２に示す部位までレバー４００が回動せず、小曲率面４３３が曲受面２３１に密着しない場合は、脚用ブラケット２００が不安定になる。この場合は、操作部４２０を天板１０の方向に回動して、小曲率面４３３と曲受面２３１を密着させる。 When the leg bracket 200 is further opened from the state in which the leg bracket 200 is in the middle of opening and closing, the portion where the cam portion 430 and the receiving portion 230 abut move from the flat receiving surface 233 toward the curved receiving surface 231. When the leg bracket 200 is perpendicular or substantially perpendicular to the top plate bracket 100, the contact portion reaches the boundary between the flat receiving surface 233 and the curved receiving surface 231, and the cam portion 430 and the receiving portion 230 Separate. At this time, the lever 400 having the bias of the torsion coil spring 440 rotates about the shaft portion 410, and the small curvature surface 433 of the cam portion 430 abuts on the curved receiving surface 231. In the case where friction occurs between the small curvature surface 433 and the curved reception surface 231 and the lever 400 does not rotate to the part shown in FIG. 2 and the small curvature surface 433 does not closely contact the curved reception surface 231, the leg bracket 200 Becomes unstable. In this case, the operation unit 420 is rotated in the direction of the top 10 to bring the small curvature surface 433 and the curved receiving surface 231 into close contact.
　図６は、本発明の脚体固定装置１のヒンジ軸３００の周辺の拡大概略断面図であり、脚用ブラケット２００を天板用ブラケット１００に対して直角に開いた状態である。この状態においては、小曲率面４３３が曲受面２３１と当接し、かつ脚体２０が天板１０に当接し、脚用ブラケット２００は開脚した状態を維持している。 FIG. 6 is an enlarged schematic cross-sectional view of the periphery of the hinge shaft 300 of the leg fixing device 1 of the present invention, in which the leg bracket 200 is opened at a right angle to the top plate bracket 100. In this state, the small curvature surface 433 is in contact with the curved receiving surface 231, the leg 20 is in contact with the top plate 10, and the leg bracket 200 is maintained in the open state.
　図７は、本発明の脚体固定装置１のヒンジ軸３００の周辺の拡大概略断面図であり、脚用ブラケット２００を天板用ブラケット１００に対して直角よりやや閉じた仮想の状態を示す。図６の状態から、脚用ブラケット２００に外力を加えて、脚用ブラケット２００が天板用ブラケット１００に対して閉じようとしても、脚用ブラケット２００の曲受面２３１からカム部４３０の小曲率面４３３に伝達する力は、曲面である曲受面２３１および小曲率面４３３の広範な当接部位から軸部４１０の方向に集中する。そのため、カム部４３０は、回動せず静止した状態を維持し、脚用ブラケット２００が閉じる方向への回動を阻害する。 FIG. 7 is an enlarged schematic cross-sectional view of the periphery of the hinge shaft 300 of the leg fixing device 1 of the present invention, and shows an imaginary state in which the leg bracket 200 is slightly closed at a right angle with respect to the top plate bracket 100. Even if an external force is applied to the leg bracket 200 from the state of FIG. 6 to try to close the leg bracket 200 with respect to the top plate bracket 100, the small curvature of the cam portion 430 from the curved receiving surface 231 of the leg bracket 200 The force transmitted to the surface 433 is concentrated in the direction of the shaft portion 410 from the wide contact portion of the curved receiving surface 231 and the small curvature surface 433 which are curved surfaces. Therefore, the cam portion 430 is maintained in a stationary state without being rotated, and inhibits the leg bracket 200 from rotating in the closing direction.
　図８は、本発明の脚体固定装置１のヒンジ軸３００の周辺の拡大概略断面図であり、脚用ブラケット２００を天板用ブラケット１００に対して直角よりやや開いた状態を示す。脚用ブラケット２００を直角より開く方向に回動しようとしても、実際には、脚用ブラケット２００を装着した脚体２０が天板１０に当接して、脚用ブラケット２００は回動しない。しかしながら、脚体２０の変形により、脚用ブラケット２００が直角よりわずかに開くことはある。レバー４００に力を加えずに、脚用ブラケット２００が直角よりわずかに開くとき、曲受面２３１は小曲率面４３３から離隔しようとする。このとき、ねじりコイルバネ４４０によってレバー４００に与えられる付勢によって、小曲率面４３３が曲受面２３１に追随するように、レバー４００が脚用ブラケット２００の開脚とは逆の方向に回動する。 FIG. 8 is an enlarged schematic cross-sectional view of the periphery of the hinge shaft 300 of the leg fixing device 1 of the present invention, showing the leg bracket 200 slightly open from a right angle with respect to the top plate bracket 100. Even if the leg bracket 200 is pivoted in a direction to open from a right angle, the leg 20 on which the leg bracket 200 is mounted abuts against the top plate 10 and the leg bracket 200 does not pivot. However, due to the deformation of the leg 20, the leg bracket 200 may open slightly from a right angle. The curved bearing surface 231 tries to separate from the small curvature surface 433 when the leg bracket 200 is slightly opened at a right angle without applying a force to the lever 400. At this time, the biasing force applied to the lever 400 by the torsion coil spring 440 causes the lever 400 to pivot in the direction opposite to the opening direction of the leg bracket 200 so that the small curvature surface 433 follows the curved receiving surface 231. .
　天板用ブラケット１００と脚用ブラケット２００が直角よりやや開いても、小曲率面４３３と曲受面２３１は引き続き当接する。この状態から、脚用ブラケット２００を閉じる方向に外力を加えて、脚用ブラケット２００が天板用ブラケット１００に対して閉じようとしても、脚用ブラケット２００の曲受面２３１からカム部４３０の小曲率面４３３に伝達する力は、曲面である曲受面２３１および小曲率面４３３の広範な当接部位から軸部４１０の方向に集中する。そのため、カム部４３０は、回動せず静止した状態を維持し、カム部４３０によって脚用ブラケット２００は閉じる方向への回動を阻害される。 Even if the top plate bracket 100 and the leg bracket 200 are slightly opened at a right angle, the small curvature surface 433 and the curved receiving surface 231 continue to abut. From this state, an external force is applied in the direction to close the leg bracket 200 to make the leg bracket 200 close to the top plate bracket 100, but the cam receiving portion 231 of the leg bracket 200 The force transmitted to the curved surface 433 is concentrated in the direction of the shaft 410 from a wide contact portion of the curved receiving surface 231 and the small curved surface 433 which are curved surfaces. Therefore, the cam portion 430 is maintained in a stationary state without rotating, and the leg bracket 200 is inhibited from rotating in the closing direction by the cam portion 430.
　以上において説明したとおり、本実施例で示す脚体固定装置１は、脚用ブラケット２００が天板用ブラケット１００に対して直角または直角よりやや開いた状態であって、小曲率面４３３が曲受面２３１に当接するときは、カム部４３０によって脚用ブラケット２００は閉じる方向への回動を阻害される。そのため、脚用ブラケット２００は、天板用ブラケット１００に対して開脚状態を維持し、かつ固定された状態となる。また、カム部４３０および受座部２３０の当接部位の周辺は、平坦あるいは平坦に近い曲率半径を有する曲面に形成可能であるため、変形や破損に強い。 As described above, in the leg fixing device 1 shown in the present embodiment, the leg bracket 200 is slightly open from the right angle or right angle with respect to the top plate bracket 100, and the small curvature surface 433 is curved When abutting against the surface 231, the cam portion 430 inhibits the leg bracket 200 from pivoting in the closing direction. Therefore, the leg bracket 200 maintains the open state with respect to the top plate bracket 100 and is in a fixed state. In addition, the periphery of the contact portion between the cam portion 430 and the seat portion 230 can be formed to be a flat surface or a curved surface having a radius of curvature close to a flat surface, so it is resistant to deformation or breakage.
　図６の天板用ブラケット１００と脚用ブラケット２００が直角である状態から脚用ブラケット２００を閉じるためには、カム部４３０の小曲率面４３３と受座部２３０の曲受面２３１に生じている当接を解除する必要がある。レバー４００の操作部４２０を、ねじりコイルバネ４４０の付勢に逆らって脚用ブラケット２００の方向に回動させると、小曲率面４３３は、摺動しながら曲受面２３１から僅かに離隔する。ここで、カム部４３０はレバー４００の作用点に相当し、操作部４２０はレバー４００の力点に相当する。そのため、小曲率面４３３と曲受面２３１が密着した状態であっても、レバー４００は、操作部４２０に対して脚体２０の方向に力を加えることによって容易に回動し、脚用ブラケット２００の固定を解除することができる。 In order to close the leg bracket 200 from the state where the top plate bracket 100 and the leg bracket 200 in FIG. 6 are at a right angle, the small curvature surface 433 of the cam portion 430 and the curved bearing surface 231 of the seat portion 230 Need to release the contact. When the operating portion 420 of the lever 400 is pivoted in the direction of the leg bracket 200 against the bias of the torsion coil spring 440, the small curvature surface 433 slides slightly away from the curved receiving surface 231. Here, the cam portion 430 corresponds to the action point of the lever 400, and the operation portion 420 corresponds to the force point of the lever 400. Therefore, even when the small curvature surface 433 and the curved receiving surface 231 are in close contact with each other, the lever 400 is easily rotated by applying a force to the operation unit 420 in the direction of the leg 20, and the leg bracket 200 can be unlocked.
　カム部４３０の窪面４３２がヒンジ軸３００に近接するまでレバー４００を回動すると、脚用ブラケット２００の大曲率面４３４を平受面２３３と当接させることができ、脚用ブラケット２００は、閉じる方向への回動が可能になる。このとき、レバー４００を自由にして、レバー４００がねじりコイルバネ４４０の付勢を得ても、レバー４００は回動せず、図５の状態を経由して閉脚することができる。 When the lever 400 is rotated until the recessed surface 432 of the cam portion 430 approaches the hinge shaft 300, the large curvature surface 434 of the leg bracket 200 can be brought into contact with the flat receiving surface 233. It is possible to turn in the closing direction. At this time, even if the lever 400 is freed and the lever 400 gets biased by the torsion coil spring 440, the lever 400 does not rotate and can be closed via the state of FIG.
　レバー４００のカム部４３０および脚用ブラケット２００の受座部２３０は、肉厚であり、互いに負荷を掛け合うため、高度な耐変形性と成形容易性が求められる。レバー４００および受座部２３０の好ましい材質の一例として、アルミダイキャストが挙げられる。 Since the cam portion 430 of the lever 400 and the receiving portion 230 of the leg bracket 200 are thick and load-placing each other, high deformation resistance and ease of formation are required. An example of a preferable material of the lever 400 and the seat portion 230 is aluminum die casting.
１…脚体固定装置。
１０…天板。
２０…脚体。
１００…天板用ブラケット、１１０…背部、１２０…片部、１３０…壁部、１４０…台座部、１６０…スリット。
２００…脚用ブラケット、２１０…背部、２２０…壁部、２３０…受座部、２３１…曲受面、２３２…斜受面、２３３…平受面、２６０…スリット。
３００…ヒンジ軸。
４００…レバー、４１０…軸部、４２０…操作部、４３０…カム部、４３１…先端面、４３２…窪面、４３３…小曲率面、４３４…大曲率面、４４０…ねじりコイルバネ、４４１…腕部。
５００…プランジャー、５１０…ボールボタン、５１１…穴部、５１２…斜面部、５２０…内部、５２１…雌螺子、５３０…ピン、５３１…ピン頭部、５３２…ピン胴部、５４０…スプリング、５５０…調整螺子、５５１…雄螺子。

  1 ... Leg fixing device.
10 ... top board.
20 ... legs.
DESCRIPTION OF SYMBOLS 100 ... Bracket for top plates, 110 ... back | bag, 120 ... piece part, 130 ... wall part, 140 ... pedestal part, 160 ... slit.
200: leg bracket, 210: back, 220: wall portion, 230: receiving portion, 231: curved receiving surface, 232: oblique receiving surface, 233: flat receiving surface, 260: slit.
300 ... hinge axis.
400: lever, shaft portion, 420, operation portion, 430, cam portion, 431, tip end surface, 432, depressed surface, 433: small curvature surface, 434: large curvature surface, 440: torsion coil spring, 441: arm portion .
DESCRIPTION OF SYMBOLS 500 ... plunger, 510 ... ball button, 511 ... hole part, 512 ... slope part, 520 ... inside, 521 ... female screw, 530 ... pin, 531 ... pin head, 532 ... pin trunk part, 540 ... spring, 550 ... adjustment screw, 551 ... male screw.

Claims (3)

  1. 　天板用ブラケットと、
    　脚用ブラケットと、
    　前記天板用ブラケットに対して前記脚用ブラケットを蝶番状に回動可能に支持するヒンジ軸と、
    　前記脚用ブラケットと平行に回動するレバーと、を備え、
    　前記レバーは前記ヒンジ軸とは異なる軸部と、前記軸部を挟んで対向する操作部とカム部を有し、
    　前記カム部は小曲率面を有し、前記脚用ブラケットは前記小曲率面と曲率が一致する曲受面を有する受座部を有し、
    　前記小曲率面が前記曲受面に当接するときは、前記脚用ブラケットが前記天板用ブラケットに対して閉じようとする外力に対して、前記カム部は静止した状態を維持することを特徴とする脚体固定装置。     Top plate bracket,
    With leg brackets,
    A hinge shaft rotatably supporting the leg bracket in a hinge shape with respect to the top plate bracket;
    A lever rotating in parallel with the leg bracket;
    The lever has a shaft different from the hinge shaft, and an operating portion and a cam facing each other with the shaft interposed therebetween.
    The cam portion has a small curvature surface, and the leg bracket has a seat portion having a curved receiving surface whose curvature matches the small curvature surface,
    When the small curvature surface abuts on the curved receiving surface, the cam portion maintains a stationary state against an external force which causes the leg bracket to close to the top plate bracket. Leg fixing device.
  2. 　ねじりコイルバネが前記天板用ブラケットと前記レバーに係止され、前記操作部は、前記ねじりコイルバネの弾性力によって、前記天板用ブラケットの方向に回動するための付勢を受けていることを特徴とする請求項１に記載の脚体固定装置。 The torsion coil spring is engaged with the top plate bracket and the lever, and the operating portion is urged by the elastic force of the torsion coil spring to rotate in the direction of the top plate bracket. The leg fixing device according to claim 1 characterized by the above.
  3. 　前記カム部は大曲率面を有し、前記脚用ブラケットの前記受座部は平受面を有し、前記大曲率面が前記平受面に当接するときは、前記平受面は前記大曲率面に対して摺動しながら前記脚用ブラケットが回動することを特徴とする請求項１または２に記載の脚体固定装置。

          The cam portion has a large curvature surface, and the receiving portion of the leg bracket has a flat receiving surface, and when the large curvature surface abuts on the flat receiving surface, the flat receiving surface is large The leg fixing device according to claim 1 or 2, wherein the leg bracket pivots while sliding on a curved surface.

PCT/JP2018/047203 2017-12-22 2018-12-21 Leg body fixing device WO2019124541A1 (en)

Applications Claiming Priority (2)

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JP2017-246974 2017-12-22
JP2017246974A JP2021036156A (en) 2017-12-22 2017-12-22 Leg body fixing device

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Publication Number Publication Date
WO2019124541A1 true WO2019124541A1 (en) 2019-06-27

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WO (1) WO2019124541A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2020250278B2 (en) * 2020-10-08 2022-07-21 Pinnacle Diversity Pty Ltd Hinge securable in position and hinge for folding leg securable in position

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003250637A (en) * 2002-03-05 2003-09-09 Mass-Set Co Ltd Lock structure for folding leg pole

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003250637A (en) * 2002-03-05 2003-09-09 Mass-Set Co Ltd Lock structure for folding leg pole

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2020250278B2 (en) * 2020-10-08 2022-07-21 Pinnacle Diversity Pty Ltd Hinge securable in position and hinge for folding leg securable in position

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