JP2018064903A - Attachment part structure of rotation operation member and store fixture comprising the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachment part structure of a rotation operation member which can easily assemble a rotation operation member to a support structure without applying a large load to a constitution member, and a store fixture comprising the same.SOLUTION: An attachment part of a rotation operation member has a pivot 51, a pivot holding part 22 having an insertion opening 25, and falling regulation means. The falling regulation means has an assembly position regulation function part and a rotation regulation function part. The assembly position regulation function part allows insertion and withdrawal of the pivot 51 to and from the insertion opening 25 when relative rotation positions of the pivot holding part 22 and the pivot 51 are in a first relative position range P1, and regulates insertion and withdrawal of the pivot 51 to and from the insertion opening 25 when the relative rotation positions are in a position range deviated from the first relative range. The rotation regulation function part regulates rotation displacement to the first relative position range P1 in a state in which the relative rotation positions of the pivot holding part 22 and the pivot 51 are displaced to the operation angle range in use time.SELECTED DRAWING: Figure 13

Description

  The present invention relates to a structure for attaching a rotation operation member such as an operation lever, and furniture such as a chair and a table provided with the structure.

  Some fixtures such as chairs and tables are provided with an adjustment mechanism for adjusting the front and rear positions and heights of the seat and the top board. In this type of fixture adjusting mechanism, a lock portion or the like is operated by a rotary operation member such as a rotary operation lever.

  Many of the rotation operation members used in the fixture are attached to the support structure so that the rotation operation can be performed within a predetermined operation angle range. One of the rotating operation member and the support structure is provided with a pivot, and the other is provided with a pivot holding portion for pivotally holding the pivot (see, for example, Patent Documents 1 and 2).

In the chair described in Patent Document 1, a pair of pivots are arranged on the same frame on a seat frame that is a support structure, and each pivot on the seat frame side is fitted into a rotation operation member (operation lever). A pair of substantially C-shaped pivot holding portions is formed. The end portion of each pivot is integrally formed with a pull-out restricting portion having a function of expanding the diameter of the pivot holding portion when assembled. The pivot operation member is fitted to the seat frame by fitting the pivot holding portion to the corresponding pivot shaft so that the pivot holding portion is pivotable and the axial displacement of the pivot holding portion being restricted by the restricting portion.
In addition, the rotation operation member expands the diameter by temporarily removing the substantially C-shaped pivot holding part and fitting it on the regulating part during assembly, and in this state, the pivot holding member is pivotally held. The part is rotatably fitted to the corresponding pivot.

  Moreover, the chair of patent document 2 is attached to the seat frame which is a support structure so that rotation operation member (operation lever) can rotate via the separate mount member. A pair of pivots projecting in opposite directions are projected from the rotation operation member, and a pair of holding walls are rotatably projected from the mount member so that the corresponding pivots are pivotably held. The pivot of the pivoting operation member is inserted into the support hole of the corresponding retaining wall by expanding the pair of retaining walls of the mount member, and the mount member is screwed to the seat frame while holding the pivoting operation member. Fastened and fixed.

JP 2014-070671 A Japanese Patent No. 5824304

  The attachment portion of the rotation operation member described in Patent Document 1 is a seat frame that slides the rotation operation member in the axial direction of the pivot in the state where the substantially C-shaped pivot holding portion is pulled out and pushed by the restriction portion. Since the structure is assembled to the corresponding pivot on the side, a large load acts on the pivot holding portion when the rotation operation member is assembled, and the assembly operation of the rotation operation member becomes difficult.

  In addition, the mounting portion of the rotation operation member described in Patent Document 2 extends the pair of holding walls of the mount member and inserts the pivot of the rotation operation member into the corresponding support hole of the holding wall, and mounts in that state. Since the member is screwed to the seat frame, a large load is applied to the mount member and the pivot when the pivot of the rotation operation member is fitted into the corresponding holding wall of the mount member. Assembling work of the moving operation member becomes difficult.

  Accordingly, the present invention provides an attachment of a rotation operation member that can be easily assembled to a support structure without imposing a large load on the component member when the rotation operation member is assembled, thereby improving the assembly workability. It is an object of the present invention to provide a partial structure and a fixture equipped with the same.

In order to solve the above-described problem, the structure for attaching the rotating operation member according to the present invention employs the following configuration.
The rotating operation member mounting portion structure according to the present invention includes a support structure, a pivot provided on one of the rotation operation members pivotally supported by the support structure, the support structure, and the support structure. A pivot holding portion that is provided on the other of the pivot operation members and rotatably holds the pivot, and has an insertion opening in which the pivot can be inserted and engaged from a direction substantially orthogonal to the axial direction of the pivot; Drop-out restricting means for restricting removal of the pivot from the pivot-holding portion through the insertion opening, and the slip-out restricting means is configured so that a relative rotation position between the pivot-holding portion and the pivot is the rotation. When the operation member is in a first relative position range that is separated from an operation angle range when the operation member is used, the pivot is allowed to be inserted into and removed from the insertion opening, and the pivot holding portion and the pivot are relatively rotated. In a position range outside the first relative position range. When the assembly position limiting function part for restricting the insertion and removal of the pivot with respect to the insertion opening, and the relative rotation position of the pivot holding part and the pivot are displaced to the operating angle range during use, It is provided with the pivot holding | maintenance part and the rotation control function part which controls the rotation displacement to the said 1st relative position range of the said pivot.

With the above configuration, when the rotation operation member is assembled to the support structure, for example, the following assembly procedure can be employed.
First, the relative rotation position of the pivot holding portion and the pivot is set to a position within the first relative position range (a position where insertion and removal of the pivot is permitted by the assembly position limiting function portion), and in this state, the pivot is moved through the insertion opening. The pivot holding portion is inserted and engaged from a direction substantially orthogonal to the axial direction. Thereafter, the relative rotation position of the pivot holding portion and the pivot is displaced to the operating angle range in use, and in that state, the rotation restricting function portion rotates the pivot holding portion and the pivot to the first relative position range. Regulate dynamic displacement.
Thereby, the relative rotation position of the pivot holding portion and the pivot is maintained in a position range that is out of the first relative position range, and the removal of the pivot from the insertion opening is restricted by the assembly position limiting function unit. In this case, the pivoting of the pivot from the insertion opening is restricted by the cooperation of the assembly position limiting function part and the rotation restricting function part, so that a large load is applied to the constituent members when the rotation operation member is assembled to the support structure. It becomes difficult to act.

The assembling position restriction function unit includes a circular arc part having an arc shape centered on the axis of the pivot axis, and a linear part that linearly connects both ends of the arc part, and the non-circular outer peripheral surface of the pivot axis And the insertion opening formed narrower than the maximum diameter of the outer peripheral surface of the arc portion of the pivot and wider than the minimum diameter of the outer peripheral surface including the linear portion of the pivot, and The pivot and the insertion opening are inserted into the insertion opening in an angular posture in which the pivot has the minimum diameter when the relative rotation position of the pivot holding portion and the pivot is in the first relative position range. It may be formed as described.
In this case, when the rotation operation member is assembled to the support structure, the relative rotation position of the pivot holding portion and the pivot is adjusted to be within the first relative position range, and the pivot shaft is inserted into the insertion opening of the pivot holding portion in that state. Is inserted from a direction substantially orthogonal to the axial direction. At this time, the minimum diameter portion of the pivot passes through the insertion opening. If the relative rotation position of the pivot holding portion and the pivot is displaced from this state to the operating angle range in use, the width of the pivot facing the insertion opening is increased from the minimum diameter. In this state, when the rotational displacement of the pivot holding portion and the pivot to the first relative position range is restricted by the rotation restricting function portion, the removal of the pivot from the insertion opening is restricted.
In this case, the assembly position restriction function unit can be configured with a simple structure having a small number of parts.

The pivot shaft holding portion has an arc surface that slidably holds the arc portion of the pivot shaft, and an abutting surface that can abut on the linear portion of the pivot shaft, inside the insertion opening, A contact surface may be in contact with the linear portion of the pivot, thereby restricting an operation angle range when the rotating operation member is used.
In this case, when the pivot is inserted inside the insertion opening, the outer peripheral surface of the pivot is guided in the rotational direction by the arc surface in the insertion opening, and the linear portion of the pivot contacts the contact surface in the insertion opening. It becomes possible to contact. The rotation operation member is restricted in the operation angle range during use by the linear portion of the pivot contacting the contact surface in the insertion opening. In this case, the operation angle range when the rotating operation member is used can be restricted with a simple configuration having a small number of parts.

In the state where the pivot is assembled to the pivot holding portion, the pivot restricting function portion is configured such that the pivot operation member side portion and the support structure side portion abut on each other to contact the pivot holding portion and the pivot shaft. You may make it regulate the rotational displacement to the said 1st relative position range.
In this case, the rotation restricting function unit can be configured with a simple structure.

The support structure includes a base member and an assembly member that is assembled by being displaced in one direction with respect to the base member, and the rotation operation member has the axis line along the one direction. In the state where the assembly member is assembled to the assembly member and the assembly member is assembled to the base member, the pivot operation member side portion and the base member side portion abut, thereby the pivot holding portion Further, the rotational displacement of the pivot to the first relative position range may be restricted.
In this case, when attaching the rotation operation member to the support structure, first, the pivot holding portion and the pivot are assembled in the first relative position range, and the rotation operation member is temporarily assembled to the assembly member of the support structure. Next, the assembly member of the support structure is displaced in one direction with respect to the base member and assembled in this state. Thereby, the part by the side of a rotation operation member and the part by the side of a base member contact, The rotation displacement to the 1st relative position range of a pivot holding | maintenance part and a pivot is controlled. Therefore, the rotation displacement to the 1st relative position range of a pivot holding | maintenance part and a pivot can be controlled by the simple structure with easy assembly | attachment.

The base member has a plurality of positioning recesses arranged along one direction, and the assembly member is a slide member that is slidably assembled with the base member in the one direction. The movement operation member is rotatably assembled to the slide member, and has a positioning convex portion that is selectively engaged with any one of the positioning concave portions of the base member, and the positioning convex portion and the positioning The recess may constitute a slide lock mechanism for fixing a slide position of the slide member with respect to the base member and the rotation restricting function unit.
In this case, the positioning concave portion provided in the base member and the positioning convex portion provided in the rotation operation member engage with each other, so that the positioning concave portion and the positioning convex portion are the parts of the slide lock mechanism and the rotation restricting function portion. Since it also serves as a part, the number of parts can be reduced.

  The fixture according to the present invention is characterized by including any one of the rotation operation member mounting portions.

  According to the present invention, the pivoting of the pivot from the insertion opening is restricted by the cooperation of the assembly position limiting function unit and the rotation regulation function unit. A large load is less likely to act, and as a result, the rotating operation member can be easily assembled to the support structure. Therefore, by adopting the present invention, it is possible to improve the workability of assembling the rotation operation member.

It is the perspective view which looked at the chair concerning one embodiment of the present invention from the side. It is the perspective view which looked at the chair which concerns on one Embodiment of this invention from back (backrest side). It is the perspective view which looked at the chair concerning one embodiment of the present invention from the lower left front. It is the figure which looked at a part of chair concerning one embodiment of the present invention from the lower part. It is the perspective view which looked at a part of chair concerning one embodiment of the present invention from the diagonally right upper part. It is sectional drawing which follows the VI-VI line of FIG. 5 of the chair which concerns on one Embodiment of this invention. It is sectional drawing which follows the VII-VII line of FIG. 4 of the chair which concerns on one Embodiment of this invention. It is the perspective view which looked at some seats of the chair concerning one embodiment of the present invention from the lower part. It is the figure which looked at a part of the seat of the chair concerning one embodiment of the present invention from the lower part. It is the perspective view which made a part of structural member of the chair concerning one embodiment of the present invention a section. It is sectional drawing which follows the XI-XI line | wire of FIG. 4 of the chair which concerns on one Embodiment of this invention. It is sectional drawing which follows the XII-XII line | wire of FIG. 4 of the chair which concerns on one Embodiment of this invention. It is sectional drawing which showed typically the structure of the attaching part of the operation lever which concerns on one Embodiment of this invention, and an assembly procedure. It is sectional drawing which showed typically the structure and attachment procedure of the attaching part of the operation lever which concern on other embodiment of this invention. It is sectional drawing which shows the structure of the attaching part of the operation lever which concerns on further another embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a chair 100, which is one form of a fixture, viewed from the side. FIG. 2 is a perspective view of the chair 100 as viewed from the back (backrest side).
In the following description, for convenience of description, a direction in which a seated person sitting on the seat 4 in a normal posture faces forward is referred to as “front”, and the opposite direction is referred to as “rear”. In addition, the vertical and horizontal directions in the following description mean directions that coincide with the orientation centered on the seated person when the seated person sits on the seat body 4 in the normal posture. It should be noted that an arrow FR pointing forward, an arrow UP pointing upward, and an arrow LH pointing leftward are written at appropriate positions in the figure.

  As shown in FIGS. 1 and 2, the chair 100 is provided with a leg 1 installed on the floor F, a box-like support base 2 installed on the top of the leg 1, and an upper part of the support base 2. An attached seat receiving member 3, a seat body 4 supported on the upper portion of the seat receiving member 3 so as to be adjustable in the front-rear direction, and pivotally supported on both sides of the support base 2 (not shown in the support base 2) A backrest support body 70 having a substantially L-shaped side view that can be tilted by a reclining mechanism, a backrest body 71 attached to the front side of the upper part of the backrest support body 70, and a front side of the lower side of the backrest support body 70 A pair of left and right armrests 74 that are attached to the edge and on which the elbowtip of the seated person is placed. The backrest support 70 and the backrest main body 71 constitute a backrest 7 that supports the load on the back of the seated person.

The leg portion 1 includes a multi-leg 11 with casters 11A and a pedestal column 12 that stands up from the center of the multi-leg 11 and incorporates a gas spring (not shown) that is a lifting mechanism.
The outer cylinder 13 constituting the lower part of the pedestal 12 is fitted to and supported by the manifold 11 so as not to rotate. The inner cylinder 14 constituting the upper portion of the pedestal 12 is supported by fixing the support base 2 to the upper end portion, and the lower portion is supported by the outer cylinder 13 so as to be rotatable in the horizontal direction.
The support base 2 incorporates an elevation adjustment mechanism for the pedestal 12 and a reclining mechanism for the backrest 7.

FIG. 3 is a view of the chair 100 from which some parts have been removed as viewed from the lower left front of the seat body 4.
As shown in FIG. 3, the seat receiving member 3 has a front region and a rear region on both right and left sides connected to an upper portion of the support base 2 via a front arm 60 f and a rear arm 60 r so as to be swingable. The front arm 60f is curved upward from the front end of the support base 2 and extends outward in the chair width direction, and the lower end is supported rotatably on the front part of the support base 2 about an axis along the chair width direction. Has been. The rear arm 60r is integrally coupled to a later-described forward arm portion 72b of the backrest support body 70 at the lower end, and extends outward in the chair width direction while curving upward from the forward arm portion 72b. The front end portion of the forward arm portion 72 b of the backrest support body 70 is connected to the shaft of the reclining mechanism near the rear portion in the support base 2. For this reason, the rear arm 60r tilts around an axis along the chair width direction in accordance with the operation of the reclining mechanism.

  The seat receiving member 3 is rotatably connected to the upper ends of the front arm 60f and the rear arm 60r. Accordingly, the seat receiving member 3 constitutes a parallel link mechanism together with the front arm 60f, the rear arm 60r, and the support base 2, and is displaced in the front-rear direction in conjunction with the tilting operation of the backrest support body 70. Yes.

FIG. 4 is a view of the seat body 4 and the seat receiving member 3 connected to the seat body 4 as viewed from below. FIG. 5 is a view of the left front portion region of the seat receiving member 3 as viewed from above the right front portion, and FIG. 6 is a view showing a cross section taken along line VI-VI in FIG. 4 and 5, only the left half of the seat body 4 and the seat receiving member 3 is shown, but the seat body 4 and the seat receiving member 3 are formed substantially symmetrically.
As shown also in these drawings, the seat receiving member 3 includes a pair of left and right side frame portions 61 and a connecting frame portion 62 that connects the front regions of the left and right side frame portions 61. . In the case of this embodiment, the left and right side frame portions 61 and the connecting frame portion 62 are formed as an integral member. The left and right side frame portions 61 are arranged to be parallel to each other. Guide rails 63 project from the upper portions of the left and right side frame portions 61 in order to support the seat body 4 slidably in the front-rear direction.

  Each of the left and right side frame portions 61 is configured by a substantially rectangular parallelepiped block elongated in the front-rear direction. On the other hand, as shown in FIG. 5, the connecting frame portion 62 connected to the side frame portion 61 is formed in a shape in which a substantially arc-shaped cross section that is concave downward extends in the chair width direction. In other words, a concave portion 62 a that is continuous in the chair width direction is formed on the upper surface side of the connecting frame portion 62. As shown in FIG. 6, a lightening portion 61 a that opens in a concave shape is provided on the extended upper position of the connection frame portion 62 of each of the left and right side frame portions 61. An inner side wall 61b adjacent to the recess 62a of the connection frame portion 62 is provided on the inner side in the chair width direction of the lightening portion 61a of each side frame portion 61. A protruding support wall 61c is provided. Fitting holes 61b-h and 61c-h into which the pivot pins 64 are fitted are formed in the inner side wall 61b and the support wall 61c, respectively.

  At the upper end of the front arm 60f described above, a connecting piece 65 that is inserted into the lightening portion 61a of the side frame portion 61 is projected. The connecting piece 65 is formed with an insertion hole 65a into which the pivot pin 64 is rotatably inserted. A sliding bush 33 is press-fitted into the insertion hole 65a so as to rotatably support the pivot pin 64. In the state where the connecting piece 65 is disposed in the lightening portion 61 a of the side frame portion 61, a pivot pin 64 fitted and fixed to the inner side wall 61 b and the support wall 61 c is inserted, whereby the side frame portion 61 is inserted. It is connected with respect to rotation. In addition, the code | symbol 66 in FIG. 6 is the shielding wall protrudingly provided in the chair width direction outer side position of the connection piece 65 of the upper end part of the front arm 60f. The shielding wall 66 is disposed outside the support wall 61c in the chair width direction, and shields the fitting portion between the support wall 61c and the pivot pin 64 from the chair width direction outside. Since the shielding wall 66 does not directly support the pivot pin 64, the thickness in the chair width direction is thinner than the inner side wall 61b and the supporting wall 61c.

  The pivot pin 64 is formed in a non-circular outer shape having a two-sided width, and the fitting holes 61b-h and 61c- in the inner side wall 61b into which the pivot pin 64 is fitted and the support wall 61c are fitted. h is also formed in a non-circular shape so as to match the outer surface shape of the pivot pin 64. Reference numeral 67 in FIGS. 5 and 6 denotes an unscrewing restriction screw screwed to the pivot pin 64 from the direction orthogonal to the axis in a state where a part is locked to the side frame portion 61. The pivot pin 64 is restricted from rotating and coming off from the side frame portion 61 by fitting with the fitting holes 61 b-h and 61 c-h at the non-circular portion and cooperating with the female screw 67.

  As shown in FIGS. 3 and 4, the seat body 4 includes a hard resin seat shell 40 (load support member) that receives a seating load, a cushion member (not shown) disposed above the seat shell 40, and a cushion. The skin member 41 which covers the member and the upper part of the seat shell 40 and the peripheral area, and a pair of frame receiving portions 42 provided at positions separated from each other in the chair width direction on the lower surface of the seat shell 40 are provided. Each of the left and right frame receiving portions 42 is provided at a position corresponding to the left and right side frame portions 61 of the seat receiving member 3, and extends along the front-rear direction of the seat body 4. The frame receiving portion 42 is wider than the guide rail 63 of the side frame portion 61 and is formed longer in the front-rear direction than the guide rail 63. The left and right frame receiving portions 42 are configured as an integral part of the seat shell 40. However, the frame receiving portion 42 may be formed as a separate part from the seat shell 40 and fixed to the seat shell 40 by fixing means.

  The main part of the backrest support 70 is made of a metal material such as an aluminum alloy, and as shown in FIGS. 1 to 3, a pair of left and right main frames 72 arranged in the chair width direction, and a chair width. A connection frame 73 extending in the direction and connecting the upper ends of the main frame 72 to each other. The left and right main frames 72 are formed in a substantially L shape in a side view, and a standing portion 72a that rises upward from the rear lower position of the seat body 4 and a forward direction that curves forward from the lower end of the standing portion 72a and extends forward Arm portion 72b. The front end portion of the forward arm 72b is coupled to the shaft of the reclining mechanism provided on the support base 2 as described above. Further, the upright portions 72a of the left and right main frames 72 are inclined outward in the chair width direction so that the distance between the two rises gradually toward the top.

  The backrest body 71 includes a resin backrest frame 75 and a tension member 76 that is stretched on the backrest frame 75 and directly receives an input load from the back of the seated person. As shown in FIG. 2, the backrest frame 75 is an upper portion in which the width of the left and right frame sides 75s gradually narrows downward, and the upper ends of the left and right frame sides 75s extend in the chair width direction. It is formed in the shape of a front view of an inverted triangle connected by the side frame side 75u. On each of the left and right frame sides 75s of the backrest frame 75, an upper connection arm 69u that protrudes rearward from the upper region and a lower connection arm 69l that protrudes rearward from the lower region extend. It is installed. The upper connecting arm 69u is connected to the upper region of the upright portions 72a of the left and right main frames 72 of the back support 70, and the lower connecting arm 69l is the corresponding main frame on the left and right of the back support 70. 72 is connected to a lower region of the upright portions 72a.

7 is a view showing a cross section taken along line VII-VII in FIG. 4, and FIG. 8 is a view of the left rear portion of the seat body 4 as viewed from the front lower side.
On the lower surface of each frame receiving portion 42 provided on both the left and right sides of the lower surface of the seat body 4, concave portions 43 having a substantially rectangular cross section extending substantially along the front-rear direction of the seat body 4 are formed.

  The concave portion 43 includes a bottom wall 43a that is long in the front-rear direction of the seat body 4, side walls 43s that rise downward from the inner and outer ends of the bottom wall 43a in the chair width direction, and the front end of the bottom wall 43a. A front wall 43f that rises downward from the portion, and a rear wall 43r that rises downward from the rear end of the bottom wall 43a. In the concave portion 43, a long guide fitting 44 (sliding member), which will be described in detail later, is accommodated. A part of the lower surface of the bottom wall 43 a of the concave portion 43 constitutes a downward support surface 43 a-1 that contacts the upper surface of the guide metal fitting 44 and supports the guide metal fitting 44. In addition, a substantially rectangular parallelepiped support block 45 that bulges forward is extended in the center region in the width direction of the rear wall 43r in the concave portion 43. An insertion groove 46 into which the rear end portion of the guide fitting 44 is inserted from the front is formed in the upper portion of the support block 45. The upper surface of the insertion groove 46 constitutes an upward support surface 46 u that contacts the lower surface of the rear side of the guide fitting 44 inserted into the insertion groove 46 and supports the guide fitting 44.

  As will be described in detail later, the guide bracket 44 is assembled to the guide rails 63 of the left and right side frame portions 61 of the seat receiving member 3 and then the rear end thereof is inserted into the insertion groove 46 so that the lower surface thereof faces upward. It abuts on the support surface 46 u, and the upper surfaces of the central region and the front region abut on the downward support surface 43 a-1 in the concave portion 43. In this state, the guide metal fitting 44 is bolted to the frame receiving portion 42 at the rear edge portion and the front edge portion. The guide metal fitting 44 is made of a solid metal plate and functions to reinforce the lower side of the seat shell 40 of the seat body 4 when attached to the corresponding frame receiving portion 42 of the seat body 4. .

  A bolt insertion hole (reference numeral omitted) is formed in the rear edge portion of the guide metal fitting 44, and a fixing nut 47 is fixed to the upper surface thereof by welding. An insertion hole 48 penetrating in the vertical direction is formed in the support block 45, and a bolt Br for fixing the guide fitting 44 is inserted into the insertion hole 48. The bolt Br is inserted into the insertion hole 48 from the lower side of the support block 45 and is fastened to the fixing nut 47 of the guide fitting 44 in that state. As a result, the rear edge portion of the guide fitting 44 is fixed to the support block 45 in a state where it abuts on the upward support surface 46u. Further, the front edge portion of the guide fitting 44 is fastened and fixed to the bottom wall 43a in the concave portion 43 by the bolt Bf in a state where the front edge portion is in contact with the downward support surface 43a-1.

  Further, in the rear end side region in the recessed portion 43 of each frame receiving portion 42, a relief groove 49 is formed which is recessed above the downward support surface 43a-1. The escape groove 49 is formed in a central region in the width direction of the bottom wall 43 a in the concave portion 43 so as to be slightly wider than the support block 45. The escape groove 49 is formed over a range reaching the rear wall 43r in the concave portion 43 from the front side of the support block 45 by a predetermined distance. The escape groove 49 has a concave portion formed by a fixing nut 47 fixed to the upper surface side of the guide fitting 44 when the rear end portion of the guide fitting 44 is inserted into the insertion groove 46 with the seat 4 tilted rearward and downward. 43. Interference with the bottom wall 43a side of 43 is avoided. Instead of the escape groove 49, an escape hole penetrating the frame receiving portion 42 in the vertical direction may be used.

  As shown in FIG. 7, a through hole 39 penetrating in the vertical direction is formed at a position closer to the rear side than the central portion in the front-rear direction of the guide fitting 44. The through hole 39 is formed in a long hole shape that is long in the front-rear direction. Further, a locking projection 38 that protrudes downward through the through hole 39 is provided on the bottom wall 43a of the concave portion 43 to which the guide metal fitting 44 is attached. In contrast, the upper surface of the guide rail 63 that slidably holds the guide metal fitting 44 abuts on a locking projection 38 that protrudes downward from the through hole 39, thereby causing the seat body 4 to move in the front-rear direction. A restriction recess 37 for restricting the movement range in the (sliding direction) is formed. The seat 4 is restricted from sliding backward by the locking projection 38 coming into contact with the rear wall 37r of the restricting recess 37, and the locking projection 38 comes into contact with the front wall 37f of the restricting recess 37. Slide movement to the front side is restricted. It is also possible to project the locking projection 38 on the upper surface of the guide rail 63 and form the regulating recess 37 on the bottom wall 43 a side of the recessed portion 43.

FIG. 9 is a view of a part of the frame receiving portion 42 on the left side of the seat body 4 as viewed from below. FIG. 10 is a cross-sectional view of a part of the assembly portion of the left frame receiving portion 42 of the seat body 4 and the side frame portion 61 of the seat receiving member 3 as viewed from the upper left front side. 11 is a view showing a cross section taken along line XI-XI in FIG. 4, and FIG. 12 is a view showing a cross section taken along line XII-XII in FIG.
As shown in FIGS. 10 to 12, the left and right side frame portions 61 of the seat receiving member 3 have guide rails 63 that hold the guide fittings 44 so as to be slidable back and forth. The guide rail 63 is formed in a substantially T-shaped cross section in which the width of the lower region connected to the main body portion of the side frame portion 61 is narrower than the width of the upper region. Regarding the guide rail 63, a narrow lower region is referred to as a constricted portion 63a, and a wide upper region is referred to as a head 63b.
A thin resin member 36 with good slidability is attached to the upper surface and the left and right side surfaces of the head 63b of the guide rail 63. An opening (reference numeral omitted) having the same shape is formed in a portion of the resin member 36 corresponding to the restriction recess 37 of the guide rail 63.

  On the other hand, the guide fitting 44 abuts on the upper wall 44 u that abuts on the upper surface of the head 63 b of the guide rail 63 via the resin member 36 and the left and right side surfaces of the head 63 b of the guide rail 63 via the resin member 36. It has a pair of side walls 44s and a slip-out restricting wall 44a that bends in the direction of the constricted portion 63a of the guide rail 63 from the lower ends of the left and right side walls 44s. The left and right side walls 44 s abut against the side surface of the head 63 b of the guide rail 63 via the resin member 36, thereby restricting the displacement of the seat body 4 in the chair width direction. Further, the slip-out restricting wall 44a restricts the upward displacement (disengagement upward) of the seat body 4 from the guide rail 63 by contacting the lower surface of the head 63b of the guide rail 63.

  Further, the upper wall 44u of the guide fitting 44 has the upper surface of the front region and the central region in contact with the downward support surface 43a-1 in the concave portion 43, and the rear end region is inserted into the insertion groove 46 of the support block 45. Thus, the lower surface of the rear end region (the lower surface on the end side in the sliding direction) comes into contact with the upward support surface 46u of the support block 45. In the present embodiment, the lower surface of the rear end region of the upper wall 44u of the guide fitting 44 is configured to abut on the upward support surface 46u on the seat body 4 side, but other than the upper wall 44u of the guide fitting 44. A portion, for example, a lower surface on the rear end side of the slip-out restricting wall 44a (a lower surface on the end portion side in the sliding direction) may be in contact with the upward support surface on the seat body 4 side.

  By the way, a slide lock for fixing a sliding position of the seat body 4 in the front-rear direction with respect to the seat receiving member 3 is provided between the left frame receiving portion 42 of the seat body 4 and the left side frame portion 61 of the seat receiving member 3. A mechanism 20 is provided.

An operating lever 21 (rotating operation member) having a lock claw 30a that is a positioning convex portion is rotatably attached to the left frame receiving portion 42. On the other hand, on the left side surface of the side frame portion 61 on the lower side of the guide rail 63, a plurality of lock grooves 31 that are positioning recesses are provided along the front-rear direction (along the longitudinal direction of the side frame portion 61). Is formed.
In the present embodiment, the left frame receiving portion 42 and the side frame portion 61 (seat receiving member 3) that slidably supports the frame receiving portion 42 are supported to pivotally support the operation lever 21. It constitutes a structure. Further, the side frame portion 61 (the seat receiving member 3) constitutes a base member in the support structure, and the frame receiving portion 42 is assembled by being displaced in one direction with respect to the side frame portion 61 that is the base member. The assembly member to be formed is configured. The frame receiving portion 42 also constitutes a slide member that is slidably assembled in one direction with respect to the side frame portion 61 that is a base member.

  The lock claw 30a of the operation lever 21 is selectively engaged with any one of the lock grooves 31 on the side frame portion 61 side according to the movement position of the seat body 4 in the front-rear direction. The slide lock mechanism 20 includes a lock claw 30a and a plurality of lock grooves 31 as main components.

  As shown in FIG. 9, a concave portion 50 that is recessed toward the inner side in the chair width direction is provided on the left side portion of the left frame receiving portion 42. A pivot 51 is projected from the front wall and the rear wall in the recess 50 so as to face each other. The pivot 51 protrudes along the sliding direction (front-rear direction) of the frame receiving portion 42.

  The outer peripheral surface of the pivot 51 is not a perfect circle as shown in FIGS. 10 and 11, but an arc portion 51a having an arc shape centering on the axis (axis o) of the pivot 51, and both ends of the arc portion 51a. It is formed in the non-circular shape which has the linear part 51b which connects a part to linear form. The arc portion 51a has an arc shape with a central angle of 180 ° or more. Further, as shown in FIG. 9, a bracket 52 having a substantially L-shaped bottom view protrudes from the bottom side wall of the recess 50. The bracket 52 has a columnar spring holding portion 52 a, and the spring holding portion 52 a is disposed so as to be coaxial with the pivot 51.

  The pair of pivots 51 of the frame receiving portion 42 hold the operation lever 21 that is a rotation operation member so as to be rotatable. Further, the spring holding portion 52a of the bracket 52 holds a biasing spring 53 (coil spring) that biases the operation lever 21 toward the initial position.

FIG. 13 is a schematic cross-sectional view illustrating the structure of the mounting portion of the operation lever 21 and the assembly procedure of the operation lever 21 in the order of (A), (B), and (C).
As shown in FIGS. 10 to 13, the operation lever 21 includes a pair of pivot holding portions 22 that rotatably hold the pivot 51, a flat gripping operation piece 23 connected to the pivot holding portion 22, and a grip And an arm portion 24 extending in a direction intersecting the gripping surface of the gripping operation piece 23 from a position spaced from the operation end of the operation piece 23. The locking claw 30a described above is bent and protrudes in a substantially right angle direction at the distal end portion of the arm portion 24. In the case of this embodiment, a pair of lock claws 30a are provided.

Hereinafter, for the sake of convenience of explanation, the direction of the operation lever 21 along the pivot 51 when held by the pivot 51 is referred to as a width direction.
The pair of pivot holding portions 22 are installed at two positions separated in the width direction of the grip operation piece 23. Each pivot holding portion 22 is formed to bulge in a direction intersecting with the gripping surface of the gripping operation piece 23. The pivot holding part 22 can insert and engage the corresponding pivot 51 in a direction substantially orthogonal to the direction of the axis o of the pivot 51, and can turn the pivot 51 on the inner side (back side) of the insertion opening 25. Holding holes 26 to hold.

The insertion opening 25 is formed so that the opening width w1 is wider than the minimum diameter Dmin of the pivot 51 (diameter in a direction substantially orthogonal to the extending direction of the linear portion 51b) and narrower than the maximum diameter Dmax of the pivot 51. Has been. Therefore, as shown in FIG. 13 (A), the pivot 51 can pass through the holding hole 26 when inserted into the insertion opening 25 in an angular posture with a minimum diameter Dmin, but has a maximum diameter Dmax. When inserted into the insertion opening 25 in an angular posture, it cannot pass through the holding hole 26.
A relative rotation position range of the pivot holding portion 22 and the pivot 51 that can allow the pivot 51 to pass through the insertion opening 25 is referred to as a first relative position range P1. In the present embodiment, since the relative rotation range in which the pivot 51 can be allowed to pass through the insertion opening 25 is narrow, in FIG. 13, the first relative position range P1 such as one position having no width. It is shown.

  As will be described in detail later, the range P2 to P3 of the relative rotation position of the pivot holding portion 22 and the pivot 51 when the operation lever 21 is used (hereinafter referred to as “operation angle range P2 to P3”) is the first. The relative position range is set apart from the relative position range P1. Therefore, when the relative rotation position of the pivot holding part 22 and the pivot 51 is in the first relative position range P1, the operation lever 21 can detach the pivot holding part 22 from the pivot 51, but the relative rotation of both of them is possible. When the moving position is in the operation angle range P2 to P3, the detachment of the pivot holding portion 22 from the pivot 51 is restricted. In the present embodiment, the non-circular outer peripheral surface of the pivot 51 having the arc portion 51a and the straight portion 51b, and the opening width w1 are narrower than the maximum diameter Dmax of the outer peripheral surface of the pivot 51 and wider than the minimum diameter Dmin. The insertion opening 25 constitutes an assembly position restriction function part in the attachment part of the operation lever 21.

The holding hole 26 of the pivot holding portion 22 has an arcuate surface 26a having an arcuate inner peripheral surface, and a substantially triangular cross section that bulges from both ends of the arcuate surface 26a toward the center of the arcuate surface 26a. And a restricting protrusion 26b. The restricting protrusion 26b has a pair of contact surfaces 26b-1 and 26b-2 extending linearly from both ends of the arc surface 26a toward the top of the protrusion.
The central angle of the circular arc surface 26 a of the holding hole 26 is set larger than the central angle of the circular arc portion 51 a of the pivot 51 by a predetermined angle. The diameter of the circular arc surface 26a of the holding hole 26 is set to be approximately equal to the maximum diameter Dmax of the pivot 51 (slightly larger than the maximum diameter Dmax of the pivot 51).

  When the pivot 51 is inserted into the holding hole 26 through the insertion opening 25, the operating lever 21 is in use when the regulating protrusion 26 b in the holding hole 26 abuts on the straight portion 51 b on the outer peripheral surface of the pivot 51. The operation angle range P2 to P3 is regulated. That is, the operation lever 21 includes a rotation position P2 where one contact surface 26b-1 of the restricting protrusion 26b contacts the linear portion 51b of the outer peripheral surface of the pivot 51, and an abutment surface 26b-2 of the outer periphery of the pivot 51. It is possible to rotate between the rotation position P3 and the linear portion 51b.

  In addition, the operation lever 21 has a first relative relation before the frame receiving portion 42 of the seat body 4 that is an assembly member (sliding member) is assembled to the side frame portion 61 of the seat receiving member 3 that is a base member. In the position range P1, the frame receiving portion 42 is assembled to the pivot 51. At this time, one end of the urging spring 53 is locked to the operation lever 21. As a result, the urging force of the urging spring 53 acts on the operation lever 21 in the direction toward the first relative position range P1.

Thereafter, when the frame receiving portion 42 is assembled to the side frame portion 61, the operation lever 21 is relatively rotated to the relative rotation position separated from the first relative position range P1 against the urging force of the urging spring 53. Let me. When the frame receiving portion 42 is assembled to the side frame portion 61 in this way, the lock claw 30a of the operation lever 21 receives the urging force of the urging spring 53 and engages with any lock groove 31 on the side frame portion 61. Abut in state. At this time, the operation lever 21 is restricted from rotating displacement to the first relative position range P1, and is maintained in the operation angle range P2 to P3 during use.
In the present embodiment, the lock claw 30a on the operation lever 21 side and the lock groove 31 on the side frame portion 61 side cause the rotational displacement of the pivot holding portion 22 and the pivot 51 to the first relative position range P1. A rotation restricting function part for restricting is configured. Therefore, the lock claw 30 a and the lock groove 31 constitute a slide lock mechanism 20 of the seat body 4 and a rotation restricting function part of the operation lever 21.

  As described above, the attachment portion structure of the operation lever 21 (rotating operation member) according to the present embodiment is configured such that the pivot holding portion 22 of the operation lever 21 is assembled to the pivot 51 of the frame receiving portion 42, and the frame receiving portion 42 is attached. After the seat receiving member 3 is assembled to the side frame portion 61, the pivot 51 is prevented from being removed from the insertion opening 25 by the cooperation of the assembly position limiting function portion and the rotation restricting function portion described above. For this reason, when the operation lever 21 is assembled to the frame receiving portion 42 and the side frame portion 61 which are support structures, a large load is unlikely to act on the operation lever 21 and the pivot 51. Accordingly, when the mounting structure of the operation lever 21 according to the present embodiment is employed, the operation lever 21 can be easily assembled to the support structure, and the assembly workability of the operation lever 21 is improved. To do.

  Moreover, in the attachment part structure of the operation lever 21 which concerns on this embodiment, the assembly position restriction | limiting function part of the operation lever 21 has the non-circular outer peripheral surface of the pivot 51 which has the circular arc part 51a and the linear part 51b, and the pivot 51 And the insertion opening 25 of the pivot holding portion 22 having an opening width w1 narrower than the maximum diameter Dmax of the outer peripheral surface of the arc portion 51a and wider than the minimum diameter Dmin of the pivot. The pivot 51 and the insertion opening 25 are inserted into the insertion opening 25 in such an angle posture that the pivot 51 has a minimum diameter Dmin when the relative rotation position of the pivot holding portion 22 and the pivot 51 is in the first relative position range P1. It is formed so that it can be inserted into. For this reason, when assembling the operation lever 21 in the holding hole 26 of the frame receiving portion 42, the relative rotation position of the pivot holding portion 22 and the pivot 51 of the operation lever 21 is adjusted to be within the first relative position range P1, In this state, the pivot 51 can be inserted into the insertion opening 25 of the pivot holding part 22 from a direction substantially orthogonal to the direction of the axis o of the pivot 51. Further, when the relative rotation position of the pivot holding portion 22 and the pivot 51 is displaced from this state to the operating angle range P2 to P3 in use, the width of the pivot 51 facing the insertion opening 25 is larger than the minimum diameter Dmin. The removal of the pivot 51 from the insertion opening 25 is restricted. Therefore, when the attachment part structure of the operation lever 21 according to the present embodiment is adopted, the assembly position restriction function part can be configured with a simple structure with a small number of parts.

  Further, in the mounting portion structure of the operation lever 21 according to the present embodiment, the pivot holding portion 22 can come into contact with the arc surface 26a that slidably holds the arc portion 51a of the pivot 51 and the linear portion 51b of the pivot 51. A pair of contact surfaces 26 b-1 and 26 b-2 in the holding hole 26, and one of the contact surfaces 26 b-1 and 26 b-2 comes into contact with the linear portion 51 b of the pivot 51. The operation angle range P2 to P3 when the operation lever 21 is used is regulated. For this reason, when the attachment part structure of the operating lever 21 according to the present embodiment is adopted, the operating angle range P2 to P3 when the operating lever 21 is used can be restricted by a simple configuration with a small number of parts. .

  Furthermore, in the attachment part structure of the operation lever 21 according to the present embodiment, the part on the operation lever 21 side (lock claw 30a) and the part on the support structure side (side) with the pivot 51 assembled to the pivot holding part 22 When the lock groove 31) of the part frame part 61 abuts, the rotational displacement of the pivot holding part 22 and the pivot 51 to the first relative position range P1 is restricted. For this reason, when the attachment part structure of the operation lever 21 which concerns on this embodiment is employ | adopted, the rotation control function part of the operation lever 21 can be comprised with a simple structure.

In addition, in the case of the attachment portion structure of the operation lever 21 according to the present embodiment, the support structure that supports the operation lever 21 so as to be pivotable is the side frame portion 61 that is the base member and the side frame portion 61. A frame receiving portion 42 that is an assembly member that is assembled by being displaced relative to each other in the front-rear direction. When the frame receiving portion 42 is assembled to the side frame portion 61, a portion (locking portion) on the operation lever 21 side is provided. The claw 30a) and the portion on the support structure side (the lock groove 31 of the side frame portion 61) are in contact with each other, and the rotational displacement of the pivot holding portion 22 and the pivot 51 to the first relative position range P2 to P3 is restricted. It has become so.
Therefore, when the operation lever 21 is attached to the support structure, the pivot holding portion 22 of the operation lever 21 is assembled to the pivot 51 of the frame receiving portion 42 in the first relative position range P1, and in this state, the operation lever 21 Can be rotated in the operating angle range P2 to P3 when in use, and the frame receiving portion 42 can be assembled to the side frame portion 61. When the operation lever 21 is to be displaced in the direction of the first relative position range P1 after this assembly, the operation lever 21 side portion (lock claw 30a) and the support structure side portion (the lock groove of the side frame portion 61). 31) abuts, the rotational displacement of the pivot holding portion 22 and the pivot 51 into the first relative position range P1 is restricted. Accordingly, when the mounting portion structure of the operation lever 21 according to the present embodiment is employed, the pivot holding portion 22 and the pivot 51 are rotated to the first relative position range P1 by a simple configuration that is easy to assemble. Displacement can be regulated.

  In particular, in the mounting portion structure of the operation lever 21 according to the present embodiment, the frame receiving portion 42 constituting the assembly member of the support structure is arranged in the front and rear directions on the side frame portion 61 constituting the base member of the support structure. A plurality of lock grooves 31 are formed in the side frame portion 61 along the front-rear direction, and a lock claw 30a that is selectively engaged with any one of the lock grooves 31 is formed on the operation lever 21. Has been. The lock claw 30a of the operation lever 21 and the lock groove 31 of the side frame portion 61 constitute a slide lock mechanism 20 of the seat body 4 and a rotation restricting function portion of the operation lever 21. . Therefore, when the mounting portion structure of the operation lever 21 according to the present embodiment is adopted, the number of parts can be reduced, the configuration can be simplified, and the manufacturing cost associated therewith can be reduced.

FIG. 14 is a cross-sectional view schematically showing the structure of the attachment portion of the operation lever 121 and the attachment procedure of the operation lever 121 according to another embodiment in the order of (A) and (B). In each embodiment, the same reference numerals are given to the common parts.
1 to 13, the outer peripheral surface of the pivot 51 is formed in a non-circular shape, the opening width w1 of the insertion opening 25 of the pivot holder 22 is wider than the minimum diameter Dmin of the pivot 51, and In the other embodiment shown in FIG. 14, the outer peripheral surface of the pivot shaft 151 is formed in a circular shape, and the insertion opening 25 of the pivot holding portion 22 of the operation lever 121 is formed. The opening width w1 is formed to be substantially the same width as the diameter D of the pivot 151 (a width slightly smaller than the diameter D of the pivot 151).

  The attachment portion structure of the operation lever 121 according to another embodiment shown in FIG. 14 includes an assembly position restriction function portion of the operation lever 121 configured by a locking block 116 that is integrally locked with the support structure, The rotation restricting function portion of the lever 121 is configured by a rotation restricting pin 117 that is fixed to the support structure after the operation lever 121 is assembled.

  The locking block 116 has a flat contact surface 116 a that can contact the upper portion of the mounting portion of the pivot holding portion 22 of the operation lever 121, and the contact surface 116 a can be displaced upward of the pivot holding portion 22. It comes to regulate. The insertion opening 25 of the pivot holding part 22 is set so as to be substantially parallel to the contact surface 116a when the relative rotation position of the pivot holding part 22 and the pivot 51 is in the first relative position range P1. . For this reason, when the relative rotation position of the pivot holding part 22 and the pivot 51 is in the first relative position range P1, as shown in FIG. 14A, the pivot holding part 22 is set along the contact surface 116a. By displacing, the pivot 51 can be assembled to the insertion opening 25. On the other hand, as shown in FIG. 14B, when the relative rotation position of the pivot holding portion 22 and the pivot 51 is displaced to the operating angle range P2 to P3 in use from this state, the insertion opening 25 is brought into contact with the contact surface 116a. The direction is changed in a direction intersecting with the axis 51. As a result, the contact surface 116a restricts the removal of the pivot holding portion 22 from the pivot 51.

  As shown in FIG. 14B, the rotation restricting pin 117 changes the relative rotation position of the pivot holding portion 22 and the pivot 51 to the operation angle range P2 to P3 after the operation lever 121 is assembled to the pivot 151. In this state, it is locked and fixed to the support structure. Thereby, the rotation displacement of the operation lever 121 to the first relative position range P1 is restricted by the rotation restriction pin 117.

  The mounting portion structure of the operation lever 121 according to this embodiment is different from the above embodiment in the specific configuration of the assembly position restriction function portion and the rotation restriction function portion, but the basic functions are substantially the same. Basic effects similar to those of the above embodiment can be obtained.

FIG. 15 is a cross-sectional view schematically showing the structure of the mounting portion of the operation lever 121 according to still another embodiment.
The mounting portion structure of the operation lever 121 according to this embodiment is different from the other embodiments shown in FIG. 14 only in the shape of the outer peripheral surface of the pivot 251. The pivot shaft 251 of the present embodiment is formed in a polygonal shape in which the outer peripheral surface is not circular and the distances from the axis o to the top are all equal. Also in this case, since the pivot holding part 22 can turn around the polygonal pivot 251 in the same manner, it is possible to obtain substantially the same operations and effects as in the other embodiments described above.

In addition, this invention is not limited to said embodiment, A various design change is possible in the range which does not deviate from the summary. For example, in each of the embodiments described above, the pivot 51 is provided on the support structure (frame receiving portion 42) side, and the pivot holding portion 22 is provided on the rotating operation member (operation lever 21) side. Conversely, the pivot may be provided on the rotating operation member side, and the pivot holding portion may be provided on the support structure side.
Furthermore, the seat body 4 of the above-described embodiment has a structure in which a cushion material is disposed on the upper portion of the seat shell 40, and the circumferential area of the cushion material and the seat shell 40 is covered with the skin member 41. May have a structure in which a mesh-like tension member is stretched on a seat frame.
Moreover, in said embodiment, although the operation lever 21 which locks and unlocks the front-back position of the seat body 4 of a chair comprises the rotation operation member, the rotation operation member which concerns on this invention is this For example, an operation lever for adjusting the elevation height of a chair or a table may be used.

21, 121 Operation lever (rotating operation member)
22 Axis holding part 25 Insertion opening 26a Arc surface 26b-1, 26b-2 Contact surface 30a Lock claw (positioning convex part)
31 Lock groove (positioning recess)
42 Frame receiving part (assembly member, slide member, support structure)
51, 151, 251 Axis 51a Arc part 51b Linear part 61 Side frame part (base member, support structure)
63 Guide rail 100 Chair (Furniture)
116 Locking block (Assembly position restriction function part)
117 Rotation restriction pin (Rotation restriction function part)
P1 first relative position range w1 opening width

Claims (7)

A pivot provided on one of the support structure and a rotation operation member pivotally supported by the support structure;
An insertion opening, which is provided on the other of the support structure and the rotation operation member, holds the pivot pivotably, and allows the pivot to be inserted and engaged from a direction substantially perpendicular to the axial direction of the pivot. A pivot holding part,
A slip-out restricting means for restricting the slip of the pivot from the pivot holding portion through the insertion opening, and
The omission control means is
When the relative rotation position of the pivot holding portion and the pivot is in a first relative position range that is separated from the operation angle range when the rotation operation member is used, the insertion and removal of the pivot with respect to the insertion opening is prevented. An assembly position limiting function that permits and restricts insertion and removal of the pivot with respect to the insertion opening when a relative rotational position of the pivot holding portion and the pivot is in a position range deviating from a first relative position range. And
In a state where the relative rotation position of the pivot holding portion and the pivot is displaced within the operating angle range during use, a rotation that restricts the rotational displacement of the pivot holding portion and the pivot to the first relative position range is controlled. A dynamic regulation function section;
An attachment portion structure for a rotating operation member, comprising: The assembly position restriction function unit is
A non-circular outer peripheral surface of the pivot having an arc portion that is an arc shape centered on the axis of the pivot, and a straight portion that linearly connects both ends of the arc portion;
The insertion opening formed narrower than the maximum diameter of the outer peripheral surface of the arc portion of the pivot and wider than the minimum diameter of the outer peripheral surface including the linear portion of the pivot, and
The pivot and the insertion opening are inserted into the insertion opening in an angular posture in which the pivot has the minimum diameter when the relative rotation position of the pivot holding portion and the pivot is in the first relative position range. It is formed so that it may be formed. The attachment part structure of the rotation operation member of Claim 1 characterized by the above-mentioned. The pivot holding part has an arc surface that slidably holds the arc part of the pivot and a contact surface that can come into contact with the linear part of the pivot, inside the insertion opening,
The rotation portion of the rotation operation member according to claim 2, wherein the contact surface regulates an operation angle range when the rotation operation member is used by contacting the linear portion of the pivot. Construction. The rotation restriction function unit is
In a state where the pivot shaft is assembled to the pivot holding portion, the portion on the rotating operation member side and the portion on the support structure side come into contact with each other so that the pivot holding portion and the first relative position range of the pivot shaft are brought into contact. The rotation operation member mounting part structure according to claim 1, wherein the rotation displacement of the rotation operation member is restricted. The support structure is
A base member;
An assembly member that is assembled by being displaced in one direction with respect to the base member,
The rotation operation member is assembled to the assembly member so that the axis is along the one direction,
In a state where the assembly member is assembled to the base member, the pivot holding member and the base member side are in contact with each other, whereby the pivot holding portion and the pivot relative to the first relative 5. The attachment structure for a rotation operation member according to claim 4, wherein the rotation displacement to the position range is restricted. The base member has a plurality of positioning recesses arranged along one direction,
The assembly member is a slide member assembled to the base member so as to be slidable in the one direction,
The rotation operation member is rotatably assembled to the slide member, and has a positioning protrusion that is selectively engaged with any of the positioning recesses of the base member,
6. The rotation according to claim 5, wherein the positioning convex part and the positioning concave part constitute a slide lock mechanism that fixes a slide position of the slide member with respect to the base member and the rotation restricting function part. Mounting structure of the moving operation member.   A fixture comprising the mounting portion structure of the rotation operation member according to any one of claims 1 to 5.

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