JP2023123081A - Coupling structure, load support member of furniture and armrest of chair - Google Patents

Abstract

To provide a coupling structure capable of smoothly locking a first locking part and a second locking part on a mounting member side to a corresponding first engaging part and a second engaging part disposed at two separate positions of a base member, a load support member of furniture and an armrest of a chair.SOLUTION: A coupling structure includes a base member and a mounting member. The base member includes a first engaging part 57 and a second engaging part 58 at two separate positions in a covered area 52 thereof. The mounting member includes, at a cover wall 65 thereof, a first locking part 66 and a second locking part 67. A cross displacement regulating part and a sliding mechanism part are provided at a part where the cover wall 65 and the covered area 52 face each other. The cross displacement regulating part regulates cross-directional relative displacement of the mounting member and the base member. When the mounting member approaches the base member from an opposite direction, the sliding mechanism part slides along with the mating member according to the approaching displacement of the mounting member, and draws an end region of the mounting member on a side where the locking part is provided, to the side of the corresponding engaging portion.SELECTED DRAWING: Figure 6

Description

TECHNICAL FIELD The present invention relates to a connection structure in which a mounting member is connected to a base member, a load bearing member for furniture using the connection structure, and an armrest of a chair.

As a connecting structure in which the mounting member is attached to the covering portion of the base member, the corresponding locking portions on the side of the mounting member are engaged from different directions with the respective engaging portions provided at two spaced apart positions on the base member. (see, for example, Patent Literature 1).

The connecting structure described in Patent Document 1 is a structure of an armrest of a chair, and an armrest main body supported by a support base or a seat of the chair constitutes a base member, and is attached to the upper surface side of the armrest main body. A pad member (surface layer member) constitutes a mounting member. The upper surface of the armrest body is provided with a covering area covered with a pad member. A rear wall having a first engaging portion recessed rearwardly is disposed at the rear end of the covering area. A front wall having a second engaging portion recessed forward is provided at the front end of the cover region. The pad member has front and rear elongated cover walls that cover above the cover area of the armrest body. The lower surface of the rear end portion of the cover wall is formed with a first locking claw (first locking portion) projecting rearward, and the lower surface of the front end portion of the cover wall is formed with a second locking claw (first locking portion) projecting downward. A locking claw (second locking portion) is formed.

When attaching the pad member to the armrest main body, first, in a state in which the front end side of the cover wall of the pad member is lifted upward, the pad member is slid rearward while the first locking claw on the rear end side is engaged. is engaged with the first engaging portion on the rear side of the armrest body. Next, after moving the pad member to the rear end position, the front end portion of the pad member is pushed downward. As a result, the second engaging claw on the front end portion of the cover wall is elastically deformed and engaged with the second engaging portion on the front end side of the armrest main body. As a result, the front and rear ends of the pad member are locked to the armrest main body in a state in which the upper portion of the covering portion is covered by the cover wall.

Japanese Patent No. 5650492

In the connection structure described in Patent Document 1, after the first locking claw on the rear side of the pad member is locked to the first engaging portion on the armrest main body side, the second locking claw on the front end side of the pad member is locked. When the claw is locked to the second engaging portion on the armrest main body side, the second locking claw deviates greatly from the position directly above the second engaging portion, and the second locking claw and the second engaging portion are locked. may not be performed smoothly. This phenomenon tends to occur when the first locking claw on the rear side of the pad member is not deeply locked to the proper position of the first engaging portion on the armrest main body side. That is, when the front end side of the pad member is pushed downward in a state in which the first engaging claw of the pad member is not deeply engaged with the proper position of the first engaging portion on the side of the armrest main body, the second engaging claw of the pad member is not engaged. The tip portion abuts on another portion shifted from the second engaging portion on the side of the armrest body, thereby hindering smooth engagement between the second engaging claw and the second engaging portion.

Therefore, in the present invention, the first engaging portion and the second engaging portion on the side of the mounting member, which are arranged at two positions apart from each other on the base member, are smoothly connected to each other. It is an object of the present invention to provide a connection structure, a load-bearing member for furniture, and an armrest for a chair that can be locked to a table.

In order to solve the above problems, the connection structure according to the present invention employs the following configuration.
A connection structure according to the present invention includes a base member having a covering area, a first engaging portion and a second engaging portion provided at two positions spaced apart from each other in the covering area, and the covering area. Mounting in which a cover wall is provided, and the cover wall is provided with a first locking portion that is locked by the first engaging portion and a second locking portion that is locked by the second engaging portion. and a member, wherein the direction in which the cover area and the back surface of the cover wall face each other is defined as the facing direction, and the direction crossing the facing direction is defined as the cross direction, the cover wall and the covered area. facing each other, a cross displacement regulating portion for regulating relative displacement of the mounting member and the base member in the cross direction; When the mounting member approaches the base member in the facing direction in a state where relative displacement is restricted, the mounting member slides against the mating member in accordance with the approaching displacement of the mounting member. and a sliding mechanism that draws at least one of the end region on the side where the first locking portion is located and the end region on the side where the second locking portion is located toward the corresponding engaging portion. characterized by

In the connection structure according to the present invention, for example, the attachment member can be connected to the base member as follows.
First, the cross displacement restricting portion restricts the displacement of the mounting member and the base member in the cross direction. Next, the mounting member is pressed against the base member in the cross direction. At this time, due to the function of the sliding mechanism, at least one of the end region of the mounting member on the side where the first locking portion is located and the end region on the side where the second locking portion is located is aligned with the corresponding engaging portion. (first engaging portion or second engaging portion) side. As a result, the engaging portion (at least one of the first engaging portion and the second engaging portion) of the mounting member is engaged with the corresponding engaging portion (first engaging portion or second engaging portion) of the base member. can be easily locked at a proper position.

When the mounting member and the base member are regulated in relative displacement in the crossing direction by the crossing displacement regulating portion, the sliding mechanism portion is configured such that when the mounting member is pressed against the base member from the facing direction, , part of the pressing load of the mounting member is applied to at least one of the end region of the mounting member on the side where the first locking portion is located and the end region on the side where the second locking portion is located. A cam mechanism may be configured to convert the load into a load that pulls toward the joining portion.

In this case, when the mounting member is pressed against the base member from the crossing direction while the crossing displacement of the mounting member and the base member is regulated by the cross displacement restricting portion, part of the pressing load is transferred to the mounting member by the cam mechanism. At least one of the end region on the side with the first locking portion and the end region on the side with the second locking portion of the corresponding engaging portion (first engaging portion or second engaging portion part) is converted into a load that draws to the side of As a result, at least one of the end region of the mounting member on the side where the first locking portion is located and the end region on the side where the second locking portion is located is drawn toward the corresponding engaging portion, and the corresponding engaging portion is pulled toward the corresponding engaging portion. It will be smoothly and easily locked to the joint.

The sliding mechanism includes a guide projection projecting from the cover wall toward the covering area, and an abutment wall provided at a position facing the guide projection in the covering area, At least one of the guide projection and the contact wall may be formed with an inclined surface that is inclined from the cover wall side toward the cover area side toward the corresponding engaging portion side.

In this case, when the crossing displacement of the mounting member and the base member is regulated by the cross displacement regulating portion, and in this state the cover wall of the mounting member is pressed in a direction approaching the covered area, the guide projection on the side of the mounting member is moved to the base. It abuts against the abutment wall on the member side. At this time, the guide protrusion and the contact wall contact each other on the inclined surface formed on at least one side, so that part of the pressing load is transferred to the end region of the mounting member on the side where the first locking portion is located. , to a load that draws at least one of the end regions on the side where the second locking portion is located toward the corresponding engaging portion (the first engaging portion or the second engaging portion). As a result, the locking portion of the mounting member is pulled toward the corresponding engaging portion of the base member, and the locking portion of the mounting member is engaged with the corresponding engaging portion of the base member, while the structure is extremely simple. can be stopped.

The guide projection has the inclined surface inclined toward the corresponding engaging portion from the cover wall toward the cover area, and the abutment wall extends from the cover area toward the cover wall. It may be constituted by a reinforcing rib that protrudes outward and reinforces the covering area.

In this case, when the mounting member is pressed in a direction approaching the covered area of the base member in a state where the crossing displacement restricting portion restricts the displacement of the mounting member and the base member in the crossing direction, the inclination of the guide projection on the side of the mounting member occurs. The surface abuts on the highly rigid reinforcing rib on the side of the base member. As a result, at least one of the end region of the mounting member on the side where the first locking portion is located and the end region on the side where the second locking portion is located is kept in sliding contact with the inclined surface and the contacting portion of the reinforcing rib. , is stably drawn to the side of the corresponding engaging portion (first engaging portion or second engaging portion). Therefore, when this configuration is adopted, the covering area of the base member can be reinforced by the reinforcing rib, and when the mounting member is mounted, the locking portion of the mounting member can be supported by the same reinforcing rib having high rigidity. It can be stably drawn in the direction of the engaging portion.

In the vicinity of the guide projection of the cover wall, at a position on the side away from the locking portion for locking from the projecting position of the guide projection, the cover wall bulges in the direction away from the covering area. A bulging portion may be formed.

In this case, the bulging portion of the cover wall of the mounting member is pressed in a direction approaching the cover area of the base member while the crossing displacement of the mounting member and the base member is regulated by the cross displacement restricting portion. Then, the guide protrusion on the cover wall side comes into contact with the contact wall on the base member side. At this time, while the bulging portion is flexurally deformed in the pressing direction, the end region of the cover wall having the locking portion for locking is warped and deformed in the direction away from the cover region. When the bulging portion is further pressed in this state, the end region of the cover wall is displaced in the direction of the corresponding engaging portion in a warped and deformed state. Therefore, when this configuration is adopted, it is possible to easily engage the engaging portion on the mounting member side with the corresponding engaging portion of the base member.

The mounting member may be made of a resin member having an elastic modulus smaller than that of the base member.

In this case, when the mounting member is pressed in a direction approaching the covering area of the base member while the crossing displacement of the mounting member and the base member is regulated by the cross-displacement restricting portion, the function of the sliding mechanism portion causes: As the end region of the mounting member moves toward the corresponding engaging portion, the cover wall is flexurally deformed in the extending direction. As a result, it becomes possible to easily engage the engaging portion of the mounting member with the corresponding engaging portion of the base member.

The cover wall is provided with the first locking portion on the first end side in the extending direction connecting the two positions, and the second locking portion is provided on the second end side in the extending direction, The first locking portion of the mounting member is locked to the first engaging portion of the base member by displacement of the mounting member from the first end side toward the second end side, and the mounting The second engaging portion of the member is engaged with the second engaging portion of the base member by displacement of the mounting member that approaches the base member in the cross direction, and the first engaging portion and the second engaging portion are engaged. The one engaging portion constitutes the intersection displacement restricting portion, and the sliding mechanism portion is the second locking portion and the second locking portion of the mutually facing portions of the cover wall and the covering area. It may be provided closer to the first end than the locking position by the engaging portion.

In this case, the mounting member can be connected to the base member as follows.
First, the first engaging portion on the first end side of the mounting member is engaged with the first engaging portion on the first end side of the base member. At this time, the second end side of the mounting member is lifted from the covering area, and in this state, the first locking portion on the first end side is displaced toward the second end side and engaged with the first engaging portion. stop. After that, the area of the cover wall of the mounting member on the second end side is pressed in a direction close to the cover area. At this time, the mounting member is drawn toward the second end portion due to the function of the sliding mechanism. As a result, when the mounting member is further pressed in a direction closer to the covering area, the mounting member is pulled toward the second end side, and the second locking portion on the second end side engages the second engaging portion. Locked.

A load-bearing member for furniture according to the present invention comprises a load-bearing member body that receives an input load, and a surface layer member that is connected to the load-bearing member body, and the load-bearing member body is configured by the base member. and the surface layer member is composed of the mounting member, and the connection structure between the load bearing member main body and the surface layer member is composed of any one of the connection structures described above.

An armrest of a chair according to the present invention comprises an armrest body that receives an input load, and a pad member connected to the armrest body, the armrest body being configured by the base member, and the pad member being the mounting member. A connection structure between the armrest main body and the pad member is constituted by any one of the connection structures described above.

In the connection structure according to the present invention, the cross-displacement restricting portion and the sliding mechanism portion are provided at mutually facing portions of the cover wall of the mounting member and the cover region of the base member. The cross displacement restricting portion restricts relative displacement in the cross direction between the attachment member and the base member. The sliding mechanism section slides against the mating member according to the approaching displacement of the mounting member when the mounting member approaches the base member from the opposing direction in a state where relative displacement between the mounting member and the base member in the crossing direction is restricted. move. The sliding mechanism slides with the mating member to correspond to at least one of the end region of the mounting member on the side where the first locking portion is located and the end region on the side where the second locking portion is located. pull it toward the engaging portion side. Therefore, when the mounting member is pressed against the covering area while the relative displacement of the mounting member and the base member in the crossing direction is regulated by the cross-displacement restricting portion, the sliding mechanism functions to move the mounting member to the first position. At least one of the end region on the side where the first locking portion is located and the end region on the side where the second locking portion is located can be drawn toward the corresponding engaging portion.
Therefore, when the connecting structure according to the present invention is adopted, the first engaging portion and the second engaging portion arranged at two positions apart from each other on the base member are connected to the corresponding first engaging portion on the side of the mounting member. The stopping portion and the second locking portion can be locked smoothly.

Since the load bearing member of the fixture according to the present invention employs the above-described connection structure in the connection portion between the load bearing body, which is the base member, and the surface layer member, which is the mounting member, the two parts of the load bearing body are spaced apart from each other. The corresponding first engaging portion and second engaging portion of the surface layer member can be smoothly engaged with the first engaging portion and second engaging portion arranged in position.

Since the armrest of the chair according to the present invention employs the above-described connecting structure in the connecting portion between the armrest main body as the base member and the pad member as the mounting member, the armrests are arranged at two positions separated from each other on the armrest main body. The corresponding first engaging portion and second engaging portion of the pad member can be smoothly engaged with the one engaging portion and the second engaging portion, respectively.

1 is a perspective view of a chair according to an embodiment; FIG. FIG. 2 is an exploded perspective view of the armrest of the chair of the embodiment. FIG. 3 is an exploded perspective view of the armrest pad member of the embodiment. FIG. 4 is an exploded perspective view of the armrest of the embodiment. FIG. 5 is a cross-sectional view corresponding to the cross-section taken along line VV in FIG. FIG. 6 is a cross-sectional view similar to FIG. 5 showing the assembling process of the armrest of the embodiment. FIG. 7 is a cross-sectional view corresponding to the cross-section taken along line VII--VII in FIG. FIG. 8 is a cross-sectional view corresponding to the cross-section taken along line VIII-VIII of FIG. FIG. 9 is a cross-sectional view similar to FIG. 5 of another embodiment of an armrest.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.
An embodiment of a chair 1, which is an example of furniture, will be described below. In the following description, the direction indicated by the arrow FR in the figure, in which the front of a person sitting on the chair 1 in a normal posture, is called "front", and the opposite direction is called "rear". Regarding "up", "down", "left", and "right", the direction indicated by the arrow UP on the upper side of the person sitting in the chair 1 in the normal posture is "up", and the opposite direction is indicated. The direction indicated by the arrow LH on the left side of the person sitting on the chair 1 in the normal posture is called "left", and the opposite direction is called "right".

FIG. 1 is a perspective view of a chair 1 of this embodiment as seen from the front side.
A chair 1 of this embodiment includes legs 2 placed on the floor, box-shaped support bases 3 installed at the upper ends of the legs 2, a seat body 4 on which a person is seated, and a support base 3. A seat support member 5 that is attached to the upper surface of the seat and supports the seat body 4, a backrest 6 that supports the back of the person seated on the seat body 4, a backrest support member 7 that supports the backrest 6 from behind, a seat A pair of left and right armrests 8 for supporting the elbows and elbow tips of a person sitting on the body 4 is provided.

The leg portion 2 includes a multiplicity leg 11 with casters 2a, and a pedestal 12 which rises from the central portion of the multiplicity leg 11 and incorporates a gas spring as an elevating mechanism. A support base 3 is attached to the upper end of the pedestal 12 so as to be rotatable in the horizontal direction. The support base 3 incorporates an elevation adjustment mechanism (not shown) for the pedestal 12 and a tilt adjustment mechanism (not shown) for the backrest support member 7 .

The seat body 4 includes a seat body 20 and a seat plate 21 that supports the seat body 20. - 特許庁The seat plate 21 is a resin-molded plate-like member forming the skeleton of the seat body 4 . Although not shown in detail, the seat body 20 includes a seat frame (not shown) attached to the outer peripheral edge of the seat plate 21 and a cushion material (not shown) made of urethane or the like installed on the upper surface of the seat plate 21. and a seat covering material stretched over the seat frame and covering the upper side of the cushion material.

The backrest 6 is formed in a curved plan view shape that is convex backward. The backrest 6 is in contact with the back of the seated person on the front side and receives the input load from the back of the seated person. The backrest support member 7 is a strength member that supports the central portion of the backrest 6 in the left-right direction from behind. The backrest support member 7 is formed in a substantially L-shaped side view. The backrest support member 7 is connected to the tilt adjustment mechanism in the support base 3 at the front end of the forward extension extending forward from the lower rear portion of the seat body 4 . The backrest 6 is connected to the front surface of the upwardly extending portion of the backrest support member 7 extending upward from the lower rear portion of the seat body 4 .
Reference numeral 13 in the drawing denotes an operation knob of a tilt adjustment mechanism protruding from the side surface of the support base 3. As shown in FIG. Reference numeral 14 in the drawing denotes a slider for adjusting the position of the front end portion of the seat body 4 which can be extended and contracted back and forth.

The left and right armrests 8 are supported on the left and right side portions of the seat support member 5 . The left and right armrests 8 are formed in a symmetrical shape on the left and right. Each armrest 8 includes a pad member 50 (surface layer member) on which the elbows and elbows of the seated person are placed, and an armrest main body 51 that receives the load input to the pad member 50 . The armrest main body 51 includes an arm portion 51a having a substantially L-shaped front view, the lower end portion of which is coupled to the side edge portion of the seat support member 5, and a load receiver integrally formed with the upper end portion of the arm portion 51a. and a block 51b. The arm portion 51a extends outward in the chair width direction from a portion fixed to the seat support member 5, and then extends upward while being slightly inclined inward in the chair width direction. The load receiving block 51b is formed in an oval shape elongated in the front-rear direction in plan view. At least the load receiving block 51b of the armrest body 51 is made of a resin material.
In this embodiment, the armrest 8 constitutes a connecting structure. The armrest main body 51 constitutes a base member of the connecting structure, and the pad member 50 constitutes a mounting member of the connecting structure attached to the base member. The armrest 8 constitutes a load bearing member of the fixture, the armrest body 51 constitutes a load bearing member body of the fixture, and the pad member 50 constitutes a surface layer member of the fixture.

FIG. 2 is an exploded perspective view of the right armrest 8 showing the armrest main body 51 and the pad member 50 exploded. FIG. 3 is an exploded perspective view of the pad member 50. FIG. FIG. 4 is an exploded perspective view of the right armrest 8 and the pad member 50 viewed from a different direction (lower side) than in FIG. 5 and 6 are cross-sectional views of the armrest 8 corresponding to the cross-section along line VV in FIG. 2, and FIGS. 7 and 8 are cross-sections along line VII-VII and line VIII-VIII in FIG. 4A and 4B are cross-sectional views of the armrest 8 corresponding respectively to cross-sections taken along FIG.
The armrest main body 51 is provided with a cover area 52 whose top is covered with the pad member 50 on the upper surface side of the load receiving block 51b. The cover region 52 is formed in an oval shape elongated in the front-rear direction in a plan view. As shown in FIGS. 7 and 8, the covering area 52 is curved upward from the outer end (one end) in the width direction of the chair toward the inner end (the other end) while being downwardly inclined. are doing. A protruding wall 53 protrudes in a direction facing the pad member 50 (diagonally upward inward in the width direction of the chair) at the outer peripheral edge of the cover region 52 . The protruding wall 53 is formed in a substantially triangular cross-sectional shape whose cross-sectional width gradually decreases from the base side to the tip side.
In the following description, a portion of the raised wall 53 positioned on the outside in the chair width direction is referred to as "first raised wall 53u", and a portion positioned on the inner side in the chair width direction is referred to as "second raised wall 53l". .

A peripheral wall 54 having a substantially constant thickness protrudes from the upper surface of the cover region 52 at a portion slightly spaced from the raised wall 53 at the outer peripheral edge toward the center of the cover region 52 . The overall shape of the peripheral wall 54 when viewed from a direction substantially perpendicular to the inclined surface of the cover region 52 is formed in a substantially oval shape that is one size smaller than the oval shape of the outer peripheral edge of the cover region 52 . The peripheral wall 54 protrudes from the inclined upper surface of the cover region 52 in a direction substantially orthogonal to the inclination of the upper surface.
As shown in FIG. 7, the direction of the inner surface of the raised wall 53 and the direction in which the peripheral wall 54 and the longitudinal ribs 56 protrude from the cover region 52 are substantially parallel. Therefore, when the armrest main body 51 is molded from a resin material, the molded armrest main body 51 can be easily removed from the molding die.

Three horizontal ribs 55a, 55b, and 55c connecting portions of the peripheral wall 54 facing each other in the chair width direction and three horizontal ribs 55a, 55b, and 55c are formed on the inclined upper surface of the cover region 52 in the chair width direction. A vertical rib 56 that connects in the front-rear direction protrudes at a substantially central position. The horizontal ribs 55a, 55b, 55c and the vertical rib 56 protrude from the inclined upper surface of the covered region 52 in a direction substantially orthogonal to the inclination of the upper surface.

As shown in FIGS. 2, 4, and 5, a first engaging portion 57 is formed at the front end position of the peripheral wall 54, and a second engaging portion 58 is formed at the rear end position of the peripheral wall 54. It is The first engaging portion 57 and the second engaging portion 58 are formed at two positions spaced apart in front and rear of the cover region 52 .

At the front end position of the peripheral wall 54, a flat surface 57a facing forward and a bulging block 57b bulging rearward from the flat surface 57a are formed. A recess 57c recessed backward from the flat surface 57a is formed. The first engaging portion 57 is composed of a recessed portion 57c, and a flat surface 57a and a bulging block 57b that form the periphery of the recessed portion 57c.

A flat surface 58a facing rearward is formed at the rear end position of the peripheral wall 54, and a substantially rectangular engaging hole 58b penetrating the peripheral wall 54 in the front and rear direction is formed in the flat surface 58a. The second engaging portion 58 is composed of an engaging hole 58b and a wall portion forming the periphery thereof.

Further, as shown in FIGS. 2, 4, 7, and 8, in the lateral region of the peripheral wall 54 on the outside in the chair width direction, a position on the front side of the connecting position of the front lateral rib 55a, A flat outer engaging portion as a partial offset in the inward direction of the cover region 52 is provided at a position rearward of the connecting position of the lateral rib 55c on the rear side and at an intermediate position between the connecting positions of the lateral ribs 55a, 55b, and 55c. A stop wall 59o (first support wall) is provided continuously. A laterally long rectangular engagement hole 60o (engagement portion) is formed in each outer locking wall 59o.

Similarly, in the side regions on the inner side of the peripheral wall 54 in the chair width direction, a position on the front side of the connection position of the front side horizontal rib 55a and a position on the rear side of the connection position of the rear side horizontal rib 55c. A flat inner locking wall 59i (second supporting wall) is provided as a partial offset in the inner direction of the cover region 52 between the connecting positions of the lateral ribs 55a, 55b and 55c. A laterally long rectangular engagement hole 60i (engagement portion) is formed in each inner locking wall 59i.

Here, of the raised walls 53 at the outermost periphery of the covering area 52, the first raised wall 53u on the outer side in the width direction of the chair is placed on the floor with the armrests 8 attached. 7 and as shown in FIG. 8, the outer side of the triangular cross section extends substantially horizontally inward in the vehicle width direction, and the inner side of the triangular cross section extends inward in the vehicle width direction and inclined upward. That is, the first raised wall 53u forms an overhang portion 61 on the inner side of the triangular cross section.

On the other hand, as shown in FIG. 3, the pad member 50 comprises a skin member 62 that forms the outermost layer when attached to the upper end of the armrest body 51, and a skin member 62 that forms the innermost layer when attached to the inside of the skin member 62. An inner shell 63 and a cushioning material 64 made of urethane or the like interposed between the skin member 62 and the inner shell 63 are provided. Both the skin member 62 and the inner shell 63 are made of a resin member having a predetermined hardness. The outer skin member 62 and the inner shell 63 (the main portion of the pad member 50 that is the mounting member) are made of a resin member having a smaller elastic modulus than the load receiving block 51b of the armrest main body 51. As shown in FIG.

The outer peripheral edge of the skin member 62 is curved downward and then bent inward by a predetermined width. The cushion material 64 and the inner shell 63 are accommodated inside the lower surface side of the skin member 62 . As shown in FIGS. 5 to 8, the cushion member 64 and the inner shell 63 are arranged such that the extending portion of the outer skin member 62, which extends downward and inward, abuts the lower surface of the outer peripheral edge of the inner shell 63. It is fixed inside the member 62 and on the lower surface side. The skin member 62 and the inner shell 63 may be further fixed to each other by screws or the like.
Below, the pad member 50 will be described assuming that the cushion member 64 and the inner shell 63 are assembled to the outer skin member 62 to be integrated.

The pad member 50 is formed to have substantially the same planar shape as the covering area 52 of the armrest body 51 . That is, the pad member 50 is formed in an oval shape elongated in the front-rear direction in plan view. The pad member 50 has a cover wall 65 that covers the covering area 52 of the armrest body 51 . In this embodiment, the cover wall 65 is composed of a portion of the skin member 62, a portion of the cushioning material 64, and a portion of the inner shell 63, which overlap in the vertical direction. A first engaging portion engaged with a first engaging portion 57 on the armrest main body 51 side is provided on the lower surface of the inner shell 63 constituting the cover wall 65 on the front end portion side (first end portion side in the longitudinal direction). A stop portion 66 is formed. Further, on the lower surface of the cover wall 65 on the rear end side (second end side in the longitudinal direction), there is provided a second engaging portion 67 that is engaged with the second engaging portion 58 on the armrest main body 51 side. is formed.
In this embodiment, the first locking portion 66 and the second locking portion 67 are formed on the inner shell 63, but the first locking portion 66 and the second locking portion 67 are formed on the outer skin member. 62 may be formed.

As shown in FIG. 5, the outer region of the cover wall 65 in the width direction of the chair is formed in a curved shape in which the center region in the front-rear direction protrudes upward. 7 and 8, the upper surface of the cover wall 65 extends from the chair width direction outer end (one end in the chair width direction) to the chair width direction inner end (the other end in the chair width direction). ) and is curved downward. As shown in FIG. 4, on the lower surface side of the curved portion of the cover wall 65 in the chair width direction (the lower surface side of the inner shell 63), a plurality of horizontal ribs 68a and vertical ribs connecting the horizontal ribs 68a are provided. 68b is projected. The horizontal rib 68a extends along the width direction of the chair, and the vertical rib 68b extends along the front-rear direction. The horizontal ribs 68a and the vertical ribs 68b constitute pad-side reinforcing ribs for increasing the rigidity of the curved surface of the cover wall 65. As shown in FIG.

The first locking portion 66 extends downward from the lower surface of the cover wall 65 on the front end side, and then the claw portion 69a on the tip end side bends rearward and extends. It is composed by The claw portion 69a of the locking claw block 69 can be inserted from the front side of the flat surface 57a of the first engaging portion 57 into the concave portion 57c of the first engaging portion 57 on the armrest body 51 side. The pad member 50 is restricted from upward displacement and rearward displacement with respect to the armrest main body 51 by inserting the claw portion 69a of the first locking portion 66 into the concave portion 57c of the first engaging portion 57 from the front side. However, when the claw portion 69a of the first engaging portion 66 is inserted into the concave portion 57c of the first engaging portion 57, the pad member 50 can be slightly rotated up and down around the insertion engaging portion. (See FIGS. 5 and 6).
In this embodiment, the first engaging portion 66 on the pad member 50 side and the first engaging portion 57 on the armrest body 51 side are aligned in the crossing direction ( cross displacement restricting portion 40 that restricts relative displacement in the longitudinal direction).

The second locking portion 67 extends downward from the lower surface of the rear end side of the cover wall 65, and then extends with a claw portion 70a at the tip bending forward. It is composed by The claw portion 70a of the locking piece 70 can be inserted from the rear side of the flat surface 58a of the second engaging portion 58 into the engaging hole 58b of the second engaging portion 58 on the armrest body 51 side. The pad member 50 is restricted from upward displacement and forward displacement with respect to the armrest main body 51 by inserting the claw portion 70a of the second locking portion 67 into the engaging hole 58b of the second engaging portion 58 from the rear side. .

However, the locking piece 70 that constitutes the second locking portion 67 is capable of slightly elastically deforming in the longitudinal direction and the vertical direction on the base side of the claw portion 70a when receiving an external force. When the rear side of the pad member 50 is pushed downward when the second engaging portion 67 is positioned above the second engaging portion 58 on the armrest body 51 side, the lower surface of the claw portion 70a is pushed downward. It abuts on the corner on the rear side of the upper end portion of the engaging portion 58 and elastically deforms rearward by receiving the contact reaction force. At this time, when the pad member 50 is further pushed in, the tip end side of the claw portion 70 a slides on the flat surface 58 a of the second engaging portion 58 and is inserted into the engaging hole 58 b of the second engaging portion 58 . That is, the second engaging portion 67 of the pad member 50 is engaged with the second engaging portion 58 by the close displacement of the pad member 50 facing the covering area 52 on the armrest body 51 side.

A guide projection 71 protrudes downward from the lower surface of the cover wall 65 at a position facing the lateral rib 55c on the rear end side of the armrest main body 51 side. The guide protrusion 71 is formed by a plate-like piece that protrudes downward in a mountain shape and has a shape when viewed from the side. The guide projection 71 is arranged substantially at the center of the cover wall 65 in the width direction of the chair. An inclined surface 71a that can abut against the upper end of the lateral rib 55c (rear corner of the upper end of the lateral rib 55c) on the cover region 52 is located forward of the top of the downwardly protruding portion of the guide projection 71. is formed. The inclined surface 71a is inclined from the cover wall 65 side toward the cover region 52 side toward the rear end portion side (second end portion side) of the pad member 50 .

In this embodiment, the guide projection 71 on the pad member 50 side and the horizontal rib 55c on the armrest main body 51 side constitute the sliding mechanism portion 72 . The lateral rib 55c constitutes a contact wall provided at a position facing the guide projection 71 in the cover region 52 on the armrest body 51 side.
The sliding mechanism portion 72 consisting of the guide protrusion 71 and the lateral rib 55c is locked by the second locking portion 67 and the second engaging portion 58 of the mutually facing portions of the cover wall 65 and the covering area 52. It is arranged on the front side (first end side) of the position.

As shown in FIG. 6 , the rear region of the pad member 50 is locked with the first locking portion 66 on the front end side of the pad member 50 locked to the first engaging portion 57 on the front end side of the armrest main body 51 . is pushed downward to the side close to the covering area 52 side, the guide projection 71 on the side of the pad member 50 constituting the sliding mechanism portion 72 and the lateral rib 55c on the side of the covering area 52 come into contact with each other. They will slide on each other. At this time, the guide protrusion 71 on the side of the pad member 50 abuts on the rear corner portion of the upper end of the lateral rib 55c with the inclined surface 71a, and receives a rearward pressing force from the lateral rib 55c while slidingly contacting the rear corner portion. As a result, the entire pad member 50 is pulled rearward.
In this embodiment, when the mounting member (pad member 50) is pressed against the base member (armrest main body 51) from the opposing direction, the sliding mechanism portion 72 shifts a portion of the pressing load P of the mounting member to the mounting member. It constitutes a cam mechanism that converts the end region on the side where the second locking portion 67 is located into a load Pa that draws the end region toward the second engaging portion 58 side.

In addition, as described above, the center region of the cover wall 65 in the width direction of the chair is curved upward in a convex manner. For this reason, as shown in FIGS. 5 and 6, in the vicinity of the guide protrusion 71 of the cover wall 65, the position on the front side (first end side) of the protrusion position of the guide protrusion 71 has an upper ( It can be said that a bulging portion 73 bulging in the direction away from the cover region 52 is formed.
As shown in FIG. 6, when a pressing load P is input from above to the bulging portion 73 of the cover wall 65 during assembly of the pad member 50, a reaction force f is generated when the guide projection 71 is pressed against the lateral rib 55c. acts to warp and deform the rear end side of the cover wall 65 upward.

Further, as shown in FIGS. 7 and 8, a protruding wall at the outer peripheral edge of the covering area 52 on the side of the armrest body 51 is provided on the outer peripheral edge of the lower surface side (back side) of the cover wall 65 (pad member 50). An engagement recess 74 that engages with 53 is formed. The engaging recess 74 is formed in a continuous ring around the covering region 52 . The engaging recess 74 has a substantially V-shaped groove that engages with the raised portion 43 on the armrest main body 51 side so as to wrap the entire triangular cross section of the raised portion 43 .
In the following description, the portion of the engagement recess 74 located on the outside in the chair width direction will be referred to as the "first engagement recess 74u", and the portion located on the inside in the chair width direction will be referred to as the "second engagement recess 74l. ”. The first engagement recess 74u is engaged with the first raised wall 53u on the armrest body 51 side, and the second engagement recess 74l is engaged with the second raised wall 53l on the armrest body 51 side.

The first engagement recess 74u includes a contact wall 75 that contacts the outer edge of the triangular cross section of the first raised wall 53u on the side of the armrest body 51, and a locking wall 76 that contacts the inner edge of the triangular cross section. , is equipped with The contact wall 75 contacts the upper surface side of the substantially horizontally extending first raised wall 53u. The locking wall 76 contacts the lower surface of the overhang portion 61 of the first raised wall 53u. The locking wall 76 restricts the displacement of the pad member 50 in the direction away from the armrest main body 51 by wrapping around below the first raised wall 53u and contacting the lower surface of the overhang portion 61 .
In this embodiment, the locking portion formed by the overhang portion 61 of the first protruding wall 53u and the locking wall 76 of the first engaging recess 74u regulates the displacement of the pad member 50 in the direction away from the armrest main body 51. constitutes a stopping means.

Further, on the lower surface (rear surface) of the cover wall 65 (pad member 50), at a position corresponding to the projecting position of the outer locking wall 59o (first support wall) of the covering area 52 on the side of the armrest body 51, As shown in FIGS. 4 and 8, an outer locking claw 77o (first locking claw) which is inserted and locked into an engaging hole 60o of the outer locking wall 59o is projected. The outer locking claw 77o protrudes at a position close to the inner side of the first raised wall 53u on the lower surface of the cover wall 65 in the width direction of the chair. The tip of the outer locking claw 77o is inserted into the engaging hole 60o from the outside of the outer locking wall 59o in the chair width direction.

Similarly, on the lower surface (rear surface) of the cover wall 65 (pad member 50), at a position corresponding to the projecting position of the inner locking wall 59i (second support wall) of the cover region 52 on the armrest body 51 side. As shown in FIG. 8, an inner locking claw 77i (second locking claw) that is inserted into and locked to an engagement hole 60i of the inner locking wall 59i projects. The inner locking claw 77i protrudes at a position close to the outside in the chair width direction of the second raised wall 53l on the lower surface of the cover wall 65. As shown in FIG. The tip of the inner locking claw 77i is inserted into the engaging hole 60i from the inner side of the inner locking wall 59i in the chair width direction.

The outer locking claw 77o and the inner locking claw 77i are locked to the outer locking wall 59o and the inner locking wall 59i, respectively, so that the pad member 50 is moved away from the armrest main body 51. Displacement is restricted. In this embodiment, a locking portion formed by the outer locking claw 77o and the outer locking wall 59o (engaging hole 60o) and a locking portion formed by the inner locking claw 77i and the inner locking wall 59i (engaging hole 60i) are also provided. , constitute locking means for restricting the displacement of the pad member 50 in the direction away from the armrest main body 51 .
Therefore, in this embodiment, the locking portion formed by the overhang portion 61 of the first protruding wall 53u and the locking wall 76 of the first engaging concave portion 74u, and the locking portion formed by the outer locking claw 77o and the outer locking wall 59o , and a locking portion formed by the inner locking claw 77i and the inner locking wall 59i constitutes locking means. Any of these locking means is positioned inside the outer edge in the chair width direction of the contact portion between the first raised wall 53u and the first engaging recess 74u, and the second raised wall 53l and the second raised wall 53l It is arranged at a position outside the inner edge in the width direction of the chair in the contact portion of the two-engagement concave portion 74l.

In the armrest 8 of the chair 1 of this embodiment, the pad member 50 can be connected to the armrest main body 51 as follows.
First, as shown in FIG. 6 , the first engaging portion 66 on the front end side of the cover wall 65 of the pad member 50 is engaged with the first engaging portion 57 on the front end side of the armrest main body 51 . At this time, the rear end side of the pad member 50 is lifted upward, and while the pad member 50 is being displaced rearward in this state, the claw portion 69a of the first engaging portion 66 is moved from the front side of the first engaging portion 57. It is inserted into the recess 57c.

After that, while pulling the pad member 50 rearward, the rear portion of the pad member 50 is pushed downward. At this time, the worker applies a pressing load P from above to the bulging portion 73 on the cover wall 65 of the pad member 50 . As a result, the guide projections 71 on the lower surface of the cover wall 65 come into contact with the upper ends of the lateral ribs 55c (reinforcing ribs) on the covering area 52. As shown in FIG. At this time, the inclined surface 71a of the guide projection 71 slides on the rear corner of the upper end of the lateral rib 55c, so that part of the pressing load P is converted into a load Pa that draws the pad member 50 rearward.
Further, when the guide projection 71 abuts on the upper portion of the lateral rib 55c at this time, the rear end side of the cover wall 65 receives the abutment reaction force f and warps upward.

In this way, when the rear side of the pad member 50 is further pushed downward, the second locking portion 67 on the rear end side of the cover wall 65 is elastically deformed, and the claw portion 70a of the second locking portion 67 is pushed into the armrest main body 51. is inserted from the rear side into the engagement hole 58b of the second engagement portion 58 on the side.

Simultaneously with the above final connecting operation, the engaging recess 74 on the outer peripheral edge of the pad member 50 is engaged with the raised wall 53 on the armrest main body 51 side, and the outer locking claw 77o on the pad member 50 side is engaged. and the inner locking claw 77i are locked to the outer locking wall 59o and the inner locking wall 59i on the armrest body 51 side. When engaging the engaging recess 74 with the protruding wall 53, the locking wall 76 of the first engaging recess 74u is brought into contact with the lower surface of the overhang portion 61 of the first protruding wall 53u (locked).

As described above, in the armrest 8 (connecting structure) of the present embodiment, the first cross-displacement regulating portion, which is the cross displacement restricting portion, is provided in the mutually facing portions of the cover wall 65 of the pad member 50 and the cover region 52 of the armrest main body 51 . A locking portion 66, a first engaging portion 57, and a sliding mechanism portion 72 are provided. The first engaging portion 66 and the first engaging portion 57, which are cross-displacement restricting portions, restrict the relative displacement of the pad member 50 and the armrest main body 51 in the crossing direction (back and forth). When the pad member 50 approaches the armrest main body 51 from the facing direction, the sliding mechanism portion 72 slides with the mating member in accordance with the displacement of the pad member 50 toward the armrest body 51 , thereby forming the second engaging portion of the pad member 50 . The end region on the side with 67 is drawn toward the corresponding engaging portion (second engaging portion 58). Therefore, when assembling the pad member 50 , after the first engaging portion 66 on the front end side of the pad member 50 is engaged with the first engaging portion 57 on the front end side of the armrest main body 51 , the rear portion of the pad member 50 is By pushing down the side, the pad member 50 is pulled toward the rear side, and the second engaging portion 67 can be smoothly engaged with the second engaging portion 58 .
Therefore, when the armrest 8 of the present embodiment is adopted, the first engaging portion 57 and the second engaging portion 58 arranged at two positions spaced apart in the front and rear of the armrest main body 51 are arranged on the pad member 50 side. The corresponding first locking portion 66 and second locking portion 67 can be locked smoothly.

In particular, in the present embodiment, the sliding mechanism portion 72 transfers part of the pressing load P of the pad member 50 to the second locking portion of the pad member 50 when the pad member 50 is pressed against the armrest main body 51 from the opposing direction. It constitutes a cam mechanism that converts the end region on the side where the portion 67 is located into a load Pa that draws the end region toward the second engaging portion 58 side. Therefore, the downward pressing load P of the pad member 50 is effectively used to easily guide the second locking portion 67 on the rear side to a position where it is properly locked to the corresponding second engaging portion 58 . can do. Therefore, when this configuration is adopted, after the first engaging portion 66 is engaged with the first engaging portion 57, the second engaging portion 67 can be smoothly and easily engaged with the second engaging portion 58. can be locked.

Further, the armrest 8 of this embodiment includes a guide projection 71 protruding downward from the lower surface of the cover wall 65 of the pad member 50 and a horizontal guide projection 71 provided on the covered area 52 of the armrest main body 51 so as to face the guide projection 71 . A sliding mechanism portion 72 is configured by the rib 55c (contact wall). The guide projection 71 is formed with an inclined surface 71a inclined rearward from the cover wall 65 side toward the covered area 52 side. For this reason, the armrest 8 of the present embodiment has a very simple structure, but when the pad member 50 is assembled, the second locking portion 67 on the rear side of the pad member 50 is pulled while pulling the pad member 50 rearward. can be easily locked to the second engaging portion 58 on the armrest main body 51 side.
In this embodiment, the guide protrusion 71 on the pad member 50 side is formed with an inclined surface 71a, and when the pad member 50 is assembled, the inclined surface 71a on the pad member 50 side is aligned with the upper end portion of the horizontal rib on the armrest main body 51 side. The structure is such that it abuts on the However, the inclined surface 71a may be provided on the armrest main body 51 side instead of being provided on the pad member 50 side. Also, the inclined surface 71a may be provided on both the pad member 50 side and the armrest main body 51 side.

In the armrest 8 of the present embodiment, the guide projection 71 protruding downward from the cover wall 65 of the pad member 50 is provided with an inclined surface 71a. The wall is constituted by reinforcing ribs (lateral ribs 55c) that reinforce the covering area 52 of the armrest body 51. As shown in FIG. Therefore, when this configuration is adopted, the covering region 52 of the armrest main body 51 can be reinforced by the lateral rib 55c, which is a reinforcing rib, and the same lateral rib having high rigidity can be used when the pad member 50 is assembled. 55c (reinforcing rib) can be used to stably draw the pad member 50 to the rear side.

Further, in the armrest 8 of the present embodiment, a bulging portion 73 that bulges upward is formed on the cover wall 65 of the pad member 50 near the front side of the projecting position of the guide projection 71 . Therefore, in a state in which the front first engaging portion 66 of the pad member 50 is engaged with the front first engaging portion 57 of the armrest body 51, the bulging portion 73 of the cover wall 65 is pushed downward from above. As a result, the rear side of the cover wall 65 can be warped and deformed with the contact portion between the guide projection 71 and the lateral rib 55c as a fulcrum.
Therefore, when this configuration is adopted, when the cover wall 65 is pushed downward, the claw portion 70a of the second locking portion 67 on the rear side of the cover wall 65 is slightly retracted upward to the rear portion, and the claw portion The portion 70 a can be smoothly moved to the position of the engagement hole 58 b of the second engagement portion 58 . As a result, the hook portion 70a of the second locking portion 67 on the rear side can be smoothly and stably locked to the engaging hole 58b of the second engaging portion 58 from the rear side.

Further, in the armrest 8 of the present embodiment, the skin member 62 and the inner shell 63, which are the main parts of the pad member 50, are made of a resin member having a smaller elastic modulus than the load receiving block 51b of the armrest main body 51. Therefore, by pushing the rear side of the cover wall 65 downward in a state where the front first engaging portion 66 of the pad member 50 is engaged with the front first engaging portion 57 of the armrest main body 51, the guide When the inclined surface 71a of the protrusion 71 contacts the lateral rib 55c, the front side of the cover wall 65 relative to the guide protrusion 71 can be slightly bent and deformed in the extending direction.
Therefore, when this configuration is adopted, when the cover wall 65 is pushed downward, the second engaging portion 67 on the rear side of the cover wall 65 is smoothly engaged by the second engaging portion 58 on the rear portion of the armrest main body. can be stopped.

The present invention is not limited to the above-described embodiments, and various design changes are possible without departing from the gist of the present invention.
For example, in the above embodiment, the first engaging portion 57 and the first locking portion 66 are arranged on the front end sides of the armrest main body 51 and the pad member 50, and the rear ends of the armrest main body 51 and the pad member 50 are arranged. A second engaging portion 58 and a second locking portion 67 are arranged on the side. However, the arrangement of each engaging portion and locking portion is not limited to this. A second engaging portion and a second locking portion are arranged on the front end side of the armrest main body and the pad member, and a first engaging portion and a first locking portion are arranged on the rear end side of the armrest main body and the pad member. You may arrange it.
In the above-described embodiment, the reinforcing rib (horizontal rib 55c) that reinforces the covering area 52 is used as the contact wall on the side of the armrest body 51 that contacts the guide projection 71 protruding from the back surface of the pad member 50. are doing. However, the contact wall on the side of the armrest body 51 that contacts the guide projection 71 is not limited to this. A dedicated abutment wall may be provided on the covered area 52 .
In the above embodiment, the upper surface of the armrest 8 is inclined downward from the outside to the inside in the width direction of the chair. It may be inclined.
Furthermore, in the above-described embodiment, the armrest main body to which the outer locking claw 77o (first locking claw) and the inner locking claw 77i (second locking claw) protruding from the lower surface of the pad member 50 are locked. Engagement holes 60o and 60i are formed in an outer locking wall 59o (first supporting wall) and an inner locking wall 59i (second supporting wall) on the 51 side, respectively. However, the engaging portions provided on the outer locking wall 59o (first supporting wall) and the inner locking wall 59i (second supporting wall) are not limited to the engaging holes 60o and 60i. The engaging portion may be a recess that does not completely penetrate the outer locking wall 59o (first supporting wall) or the inner locking wall 59i (second supporting wall).
Also, in the above-described embodiments, the connection structure according to the present invention is adopted as the armrest portion of the chair. However, the application of the connecting structure according to the present invention is not limited to chair armrests. The connection structure according to the present invention can also be applied to, for example, the backrest of a chair, or a load-bearing member for furniture other than a chair.

<Other embodiments>
FIG. 9 is a cross-sectional view similar to FIG. 5 of another embodiment armrest 108 . In addition, in other embodiments described below, the same reference numerals are given to the common parts as in the above embodiment, and the description of the overlapping parts is partially omitted.
The armrest 108 of this embodiment is used in a chair similar to the above embodiments. The armrest 108 includes a pad member 150 that is a surface layer member and an armrest main body 151 that receives the load input to the pad member 150 . A covering area 52 is provided on the upper surface side of the armrest main body 151 . The pad member 150 has a cover wall 65 that covers the covering area 52 of the armrest body 151 from above. The outer portion of the cover wall 65 in the width direction of the chair has a central region in the front-rear direction that is convexly curved upward. In other words, the cover wall 65 has a bulging portion 73 that bulges upward in the center region in the front-rear direction.

A first engaging portion 157 and a second engaging portion 58 are provided on the front end side and the rear end side of the covering area 52 of the armrest body 151, respectively. The second engaging portion 58 on the rear end side has the same structure as that of the above embodiment. A peripheral wall 54 protrudes from the outer peripheral edge of the cover region 52, and a flat surface 157a facing forward is formed at the front end of the peripheral wall. An engaging hole 157b is formed in the flat surface 157a so as to extend through the peripheral wall 54 in the front-rear direction. The first engaging portion 157 is composed of an engaging hole 157b and a wall portion forming its peripheral area.
Three horizontal ribs 55a, 55b, 55c (reinforcing ribs) are provided on the upper surface of the covering area 52 of the armrest body 151 at positions spaced apart from the front and rear ends, respectively, in the same manner as in the above embodiment. It is spaced apart and protrudes in the direction.

A first engaging portion 166 that engages with a first engaging portion 157 on the armrest main body 151 side is provided on the lower surface of the front end side of the cover wall 65 of the pad member 150 . A second engagement portion 67 that engages with the second engagement portion 58 on the armrest main body 151 side is provided on the lower surface of the rear end side of the cover wall 65 . The second locking portion 67 has a structure similar to that of the above embodiment. The first locking portion 166 extends downward from the lower surface on the front end side of the cover wall 65, and then the claw portion 169a on the tip end side bends rearward and extends by a locking piece 169 that is substantially L-shaped in side view. It is configured. The claw portion 169a of the locking piece 169 can be inserted from the front side of the flat surface 157a of the first engaging portion 157 into the engaging hole 157b of the first engaging portion 157 on the armrest body 151 side.
The pad member 150 is such that the claw portion 169a of the first locking portion 166 on the front end side is inserted into the engagement hole 157b of the first engaging portion 157 from the front side, and the second locking portion 67 on the rear end side is inserted into the engagement hole 157b of the first locking portion 157 from the front side. By inserting the claw portion 70b into the engagement hole 58b of the second engagement portion 58 from the rear side, upward displacement with respect to the armrest main body 151 is restricted.

A displacement regulating projection 30 protrudes downward from the lower surface of the cover wall 65 at a position facing the central lateral rib 55b on the armrest body 151 side (approximately at the front-rear center position of the cover wall 65). . The displacement regulating protrusion 30 is formed of a plate-like piece protruding downward in a rectangular shape (trapezoidal shape). The displacement restricting protrusion 30 is arranged at a substantially central position of the cover wall 65 in the width direction of the chair. An engaging groove 30a extending linearly upward is formed in the center of the lower side of the displacement restricting protrusion 30. As shown in FIG. The upper end of the lateral rib 55b on the side of the armrest body 151 can be inserted into the engaging groove 30a. The pad member 150 is restrained from being displaced in the front-rear direction with respect to the armrest main body 151 at the substantially central position in the front-rear direction by inserting and engaging the lateral rib 55b into the engaging groove 30a of the displacement-restricting projection 30 .
In this embodiment, the engaging groove 30a and the lateral rib 55b of the displacement restricting protrusion 30 restrict the relative displacement in the intersecting direction (front-rear direction) between the mounting member (pad member 150) and the base member (armrest main body 151). It constitutes the regulation section 140 .

Guide projections 71F and 71R protrude downward from the lower surface of the cover wall 65 at positions facing the front and rear lateral ribs 55a and 55c of the armrest body 151, respectively. Each of the guide protrusions 71F and 71R is formed by a plate-like piece that protrudes downward in a mountain shape and has a shape when viewed from the side. Each of the guide projections 71F and 71R is arranged at a substantially central position of the cover wall 65 in the width direction of the chair.

The front guide projection 71F can contact the upper end of the front lateral rib 55a on the cover area 52 (the front corner of the upper end of the lateral rib 55a) on the rear side of the top of the portion that protrudes downward. inclined surface 71Fa is formed. The inclined surface 71Fa is inclined toward the front end portion of the pad member 150 from the side of the cover wall 65 toward the cover region 52 (downward).
The rear guide projection 71R contacts the upper end of the rear lateral rib 55c (the rear corner of the upper end of the lateral rib 55c) on the covering area 52, forward of the top of the portion protruding downward. A contactable inclined surface 71Ra is formed. The inclined surface 71Ra is inclined from the cover wall 65 side toward the covering area 52 (downward) toward the rear end portion side of the pad member 150 .

The armrest 108 of the present embodiment is provided with two pairs of front and rear sliding mechanism portions 72F and 72R between the cover wall 65 and the cover region 52. As shown in FIG. The front sliding mechanism portion 72F is composed of a guide projection 71F having an inclined surface 71Fa and a front lateral rib 55a. The rear sliding mechanism portion 72R is composed of a guide projection 71R having an inclined surface 71Ra and a rear lateral rib 55c. The front lateral rib 55a and the rear lateral rib 55c constitute contact walls provided at positions facing the guide projections 71F and 71R in the covering area 52 on the armrest body 151 side. The sliding mechanism portion 72F on the front side is located between the locking portion formed by the engagement groove 60a of the displacement restricting projection 30 and the central lateral rib 55b and the locking portion formed by the first locking portion 166 and the first engaging portion 157. are placed. The sliding mechanism portion 72R on the rear side is located between the locking portion formed by the engagement groove 60a of the displacement restricting projection 30 and the central lateral rib 55b and the locking portion formed by the second locking portion 67 and the second engaging portion 58. are placed in

When the mounting member (pad member 150) is pressed against the base member (armrest main body 151) from the opposite direction, the front sliding mechanism portion 72F absorbs a part of the pressing load P of the mounting member to the first engaging portion of the mounting member. It constitutes a cam mechanism that converts an end region on the side where the stop portion 166 is located into a load that draws it toward the corresponding engaging portion (first engaging portion 157). Further, when the mounting member (pad member 150) is pressed against the base member (armrest main body 151) from the facing direction, the rear sliding mechanism portion 72R shifts part of the pressing load P of the mounting member to the mounting member. It constitutes a cam mechanism that converts an end region on the side where the second locking portion 67 is located into a load that draws the end region toward the corresponding engaging portion (second engaging portion 58).

In the armrest 108 of this embodiment, the pad member 150 can be connected to the armrest main body 151 as follows.
First, on the upper side of the covering area 52, the pad is mounted so that the position of the engaging groove 30a of the displacement regulating projection 30 on the lower surface of the pad member 150 matches the position of the central lateral rib 55b on the armrest main body 151 side. The member 150 is longitudinally aligned with the armrest body 151 (see phantom line 150 in FIG. 9). Next, in this state, the operator applies a pressing load P from above to the bulging portion 73 on the cover wall 65 of the pad member 150 . As a result, the engaging groove 30a of the displacement regulating projection 30 on the pad member 150 side is engaged with the upper portion of the central lateral rib 55b, and the inclined surfaces 71Fa, 71Fa, 71Fa of the front and rear guide projections 71F, 71R on the pad member 150 side are locked. 71Ra abuts on the upper ends of the front and rear lateral ribs 55a and 55c on the armrest body 151 side. At this time, the inclined surfaces 71Fa, 71Ra of the front and rear guide projections 71F, 71R slide on the corners of the upper ends of the corresponding lateral ribs 55a, 55c. This translates into a load that pulls the area and the trailing edge area forward and rearward, respectively.
At this time, when the front and rear guide projections 71F and 71R contact the upper portions of the front and rear lateral ribs 55a and 55c facing each other, the front and rear ends of the cover wall 65 are warped upward due to the contact reaction force. do.

In this way, when the pad member 150 is further pushed downward, the claw portion 169a of the first locking portion 166 is inserted and locked from the front side into the engaging hole 157b of the first engaging portion 157 of the armrest main body 151 side. , the claw portion 70a of the second locking portion 67 is inserted and locked into the engaging hole 58b of the second engaging portion 58 on the armrest body 151 side from the rear side. Thereby, the pad member 150 is connected to the armrest body 151 .

As described above, the armrest 108 (connecting structure) of the present embodiment includes the cross displacement restricting portion 140 and the sliding portion 140 at the mutually facing portions of the cover wall 65 of the pad member 150 and the cover region 52 of the armrest main body 151 . Movement mechanism portions 72F and 72R are provided. Then, the pad member 150 is moved in the direction corresponding to the cover region 52 while the relative displacement of the pad member 150 and the armrest main body 151 in the front-rear direction (intersecting direction) is regulated by the cross-displacement restricting portion 140 substantially in the center in the front-rear direction. By pushing in, the front and rear sliding mechanism portions 72F and 72R can be made to function. The armrest 108 of the present embodiment can pull the front end side and the rear end side of the pad member 150 toward the front side and the rear side of the armrest main body 151 by the respective functions of the front and rear sliding mechanism portions 72F and 72R. .
Therefore, when the armrest 108 of the present embodiment is adopted, the pad member 150 corresponds to the first engaging portion 157 and the second engaging portion 58 arranged at two positions spaced apart in the front and rear of the armrest main body 151. The first locking portion 166 and the second locking portion 67 can be locked smoothly.

<Other inventions>
Other inventions that can be extracted from the above embodiments are listed below together with their effects. At the end of each component in the appendices below, the reference numerals of the corresponding parts in the above embodiment are put in parentheses.
[Appendix 1]
an armrest body (51) that receives an input load;
a pad member (50) attached to the armrest body (51) and covering the upper part of the armrest body (51);
The armrest body (51) includes:
a covered area (52) overly covered by the pad member (50);
a first raised wall (53u) raised in a direction facing the pad member (50) from the vicinity of one end in the chair width direction of the covering area (52);
a second raised wall (53l) raised in a direction facing the pad member (50) from the vicinity of the other end in the chair width direction of the covering area (52);
The pad member (50) is
a cover wall (65) covering above the cover area (52) of the armrest body (51);
A first engaging recess provided near the one end of the cover wall (65) in the chair width direction and engaged with the first raised wall (53u) so as to wrap the first raised wall (53u). (74u) and
A second engagement provided near the other end of the cover wall (65) in the chair width direction and engaged with the second raised wall (53l) so as to wrap the second raised wall (53l). a recess (74l);
on the second end side of the contact portion between the first raised wall (53u) and the first engaging recess (74u) in the chair width direction than the end on the one end side, and The armrest main body ( 51), further comprising locking means for restricting displacement of said pad member (50) in a direction away from said armrest.

According to Supplementary Note 1 above, the first protruding wall on the one end side in the chair width direction of the armrest body is covered by the first engagement recessed portion on the pad member side so as to wrap, and the other end of the armrest body in the chair width direction The portion-side second raised wall is covered with the pad member-side second engaging recess. The pad member is locked to the armrest body by the locking means in this state. For this reason, it becomes impossible to easily access the locking means from the ends in the width direction of the chair. Therefore, when this configuration is adopted, it is possible to prevent the pad member from being easily removed by inserting a hand or an object into the gap between the armrest body and the pad member at the end in the width direction of the chair.

[Appendix 2]
The first protruding wall (53u) and the second protruding portion (53i) are connected to each other at the front and rear ends of the covering area (52) so that the cross-sectional shape is continuous,
The first engagement recess (74u) and the second engagement recess (74l) are connected to each other at the front and rear ends of the cover wall (65) so that the cross sections are continuous. An armrest for a chair according to Clause 1.

According to Supplementary Note 2 above, the locking means cannot be easily accessed not only from the ends in the width direction of the chair but also from the front and rear directions.

[Appendix 3]
The covering area is inclined downward from the one end in the width direction of the chair toward the other end,
Supplementary note 1 characterized in that the first raised wall (53u) and the second raised wall (53l) protrude in a direction substantially orthogonal to the inclination of the covering area (52) in the chair width direction. Or the armrest of the chair according to 2.

According to Supplementary Note 3 above, since the first raised wall and the second raised wall protrude in a direction substantially orthogonal to the inclination of the covering area, when the armrest main body is molded with resin or the like, the first It is possible to easily cut the raised wall and the second raised wall. Therefore, when this configuration is adopted, the formability of the armrest main body is improved.

[Appendix 4]
The locking means are
an overhang (61) formed toward the other end of the first raised wall (53u);
The armrest of the chair according to appendix 3, further comprising a locking wall (76) formed in the first engaging recess (74u) and abutting on the lower surface of the overhang (61).

According to Supplementary Note 4 above, since the locking means is composed of the overhang portion of the first raised wall and the locking wall of the first engaging recess, the pad member is located at a high position and is easily accessible from the outside. It is possible to regulate the displacement of the end portion on the one end side of the in the separation direction with a simple configuration. Therefore, even if the one end side of the pad member is lifted by hand or an object, the displacement of the one end side of the pad member is reliably restricted by the contact portion between the lower surface of the overhang portion and the locking wall.

[Appendix 5]
In the vicinity of the other end side of the first raised wall (53u) of the armrest body (51) and in the vicinity of the one end side of the second raised wall (53l) are engaging portions formed of holes or recesses. A first support wall (59o) and a second support wall (59i) having (60o, 60i) and protruding in a direction facing the cover wall (65) are provided,
The cover wall (65) has a first locking claw (77o) locked to the engaging portion (60o) of the first supporting wall (59o), and the A second locking claw (77i) that is locked to the engaging portion (60i) is provided,
The first locking claw (77o) and the first supporting wall (59o), the second locking claw (77i) and the second supporting wall (59i) respectively constitute the locking means. A chair armrest according to any one of the characterizing appendices 1-4.

According to the above Supplementary Note 5, the first locking claw and the first supporting wall provided close to one end and the other end in the width direction of the chair, and the second locking claw and the second supporting wall are locked, respectively. Since the means is configured, it is possible to efficiently restrict the displacement of the pad member in the direction away from the armrest main body at the end in the width direction of the chair. Therefore, even if the end of the pad member in the width direction of the chair is lifted by a hand or an object, the end of the pad member is displaced from the first locking claw and the first support wall, and from the second locking claw and the second support. It is reliably regulated by each stop on the wall.

[Appendix 6]
In the covering area (52), reinforcing ribs (55a, 55b, 55c, 56) for receiving the load from the pad member (50) are formed in a direction substantially perpendicular to the inclination direction of the covering area (52). 3. The armrest of a chair according to claim 3, characterized in that it projects towards.

According to Supplementary Note 6 above, since the reinforcing ribs for receiving the load from the pad member protrude in a direction substantially orthogonal to the direction of inclination of the covering area, when the armrest main body is molded with resin or the like, , the reinforcing ribs can be easily stamped out together with the first raised wall and the second raised wall. Therefore, when this configuration is adopted, the formability of the armrest main body is improved.

[Appendix 7]
The upper surface of the cover wall (65) of the pad member (50) is formed in a curved shape that protrudes upward from the one end in the width direction of the chair toward the other end and curves downward. Any one of appendices 3, 4, and 6, wherein pad-side reinforcing ribs (68a, 68b) projecting in a direction substantially orthogonal to the inclination of the covering area (52) are provided on the lower surface of the cover wall (65). or 1. The armrest of the chair according to 1.

According to Supplementary Note 7 above, the curved shape of the upper surface of the cover wall makes it possible to flexibly receive a load that is input obliquely from above in the width direction of the chair. Moreover, excessive deformation of the curved portion of the cover wall when a load is input can be restricted by the pad-side reinforcing ribs projecting in a direction substantially perpendicular to the inclination of the covering area.

1 ... chair (furniture)
8, 108...Armrest (connection structure)
40, 140... Intersection displacement control portion 50, 150... Pad member (mounting member, skin member)
51, 151... Armrest main body (base member, load supporting member main body)
52... Covered area 55c... Lateral rib (contact wall)
57, 157 First engaging portion 58 Second engaging portion 65 Cover wall 66, 166 First locking portion 67 Second locking portion 71, 71F, 71R Guide protrusion 71a, 71Fa, 71Ra... Slanted surface 72, 72F, 72R... Sliding mechanism part 73... Bulging part

Claims (9)

a base member having a covering area and provided with a first engaging portion and a second engaging portion at two spaced apart positions in the covering area;
A cover wall that covers the cover area is provided, and the cover wall includes a first locking portion that locks with the first engaging portion and a second locking portion that locks with the second engaging portion. a mounting member provided with
When the direction in which the covering area and the back surface of the cover wall face each other is defined as the facing direction, and the direction crossing the facing direction is defined as the crossing direction,
At the mutually facing portions of the cover wall and the covering area,
a cross-displacement restricting portion that restricts relative displacement in the cross direction between the mounting member and the base member;
When the mounting member approaches the base member in the facing direction in a state where the mounting member and the base member are restrained from being displaced relative to each other in the cross direction by the cross displacement restricting portion, the mounting member is displaced toward the base member. At least one of the end region of the mounting member on the side where the first locking portion is located and the end region on the side where the second locking portion is located is made to correspond to the mating member. A connecting structure, comprising: a sliding mechanism that pulls the joint toward the joint. When the mounting member and the base member are regulated in relative displacement in the crossing direction by the crossing displacement regulating portion, the sliding mechanism portion is configured such that when the mounting member is pressed against the base member from the facing direction, , part of the pressing load of the mounting member is applied to at least one of the end region of the mounting member on the side where the first locking portion is located and the end region on the side where the second locking portion is located. 2. The connecting structure according to claim 1, comprising a cam mechanism that converts the load into a load that pulls toward the joining portion. The sliding mechanism section
a guide projection projecting from the cover wall toward the covering area;
a contact wall provided at a position facing the guide projection of the covering area,
At least one of the guide projection and the contact wall is formed with an inclined surface inclined from the cover wall side toward the covering area side toward the corresponding engaging portion side. The linked structure according to claim 1. The guide projection has the inclined surface inclined from the cover wall toward the covered area toward the corresponding engaging portion,
4. A connecting structure according to claim 3, wherein said abutment wall comprises a reinforcing rib that protrudes from said covering area toward said cover wall and reinforces said covering area. In the vicinity of the guide projection of the cover wall, at a position on the side away from the locking portion for locking from the projecting position of the guide projection, the cover wall bulges in the direction away from the covering area. 5. The connecting structure according to claim 3, wherein a bulging portion is formed. The connecting structure according to any one of claims 1 to 5, wherein the mounting member is made of a resin member having a smaller elastic modulus than the base portion. The cover wall is provided with the first locking portion on the first end side in the extending direction connecting the two positions, and the second locking portion is provided on the second end side in the extending direction,
the first locking portion of the mounting member is locked to the first engaging portion of the base member by displacement of the mounting member from the first end side toward the second end side;
the second locking portion of the mounting member is locked to the second engaging portion of the base member by displacement of the mounting member that approaches the base member in the cross direction;
The first locking portion and the first engaging portion constitute the intersection displacement restricting portion,
The sliding mechanism part is positioned closer to the first end than the locking position by the second locking part and the second engaging part in the mutually facing parts of the cover wall and the covering area. The connection structure according to any one of claims 1 to 6, characterized in that it is provided in the a load bearing member body that receives an input load;
a surface layer member connected to the load bearing member main body,
the load supporting member main body is configured by the base member,
The surface layer member is configured by the mounting member,
A load-bearing member for furniture, characterized in that the connection structure of the load-bearing member main body and the surface layer member is constituted by the connection structure according to any one of claims 1 to 7. an armrest body that receives an input load;
a pad member connected to the armrest body,
the armrest main body is configured by the base member,
The pad member is configured by the mounting member,
An armrest of a chair, wherein a connecting structure of said armrest main body and said pad member is constituted by the connecting structure according to any one of claims 1 to 7.

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