JP7163133B2 - Backrest of chair, chair with same, method of assembling backrest - Google Patents

Description

The present invention relates to a backrest of a chair, a chair having the same, and a method of assembling the backrest.

2. Description of the Related Art Conventionally, a configuration is known in which a backrest of a chair is provided with a decorative member covering the surface of the backrest main body.
In such a chair, an engaging portion (locking claw) formed on the decorative member (cover) engages with an engaged portion (engaging hole) formed on the back surface of the backrest main body (back rod). A configuration in which the backrest main body is supported by the back rod is disclosed (for example, Patent Document 1). By adopting the above configuration, the decorative member is prevented from being displaced from the backrest main body and falling off.

JP-A-2002-136388

However, in the conventional structure, since the cover has a large-diameter base portion at the base of the engaging claw, the engaging claw is less likely to bend when the cover is attached to the back rod, and engages with the engaging hole of the back rod. it was difficult to let Therefore, it is conceivable to lengthen the extension length of the engaging claw in order to make it easier to bend. If the engaging claws are damaged, the cover cannot be satisfactorily attached to the backrest, and the cover may come off the backrest or be displaced, affecting the appearance of the backrest and chair. put away.
Therefore, there is a demand for a configuration in which the decorative member (cover) can be satisfactorily attached to the backrest main body without damaging the engaging portion (engaging claw).

The present invention has been made in view of the above technical problems, and includes a backrest in which a decorative member is satisfactorily attached to a backrest main body while preventing breakage of an engaging portion, and a chair comprising the same, To provide a method for assembling a backrest that enables stable attachment work of a decorative member to a backrest main body without damaging an engaging part.

A backrest of a chair according to one aspect of the present invention includes a backrest main body having a front surface for supporting the back of a seated person, and a backrest main body disposed on the rear surface side of the backrest main body so that the front surface faces the rear surface of the backrest main body. an engaging portion provided on one of the backrest main body and the decorative member; and one of the backrest main body and the decorative member attached to the other. and an engaged portion that is provided and engaged with the engaging portion, the engaging portions being spaced apart from each other and first engaging projections projecting toward the engaged portion. and a second engaging convex portion, and the engaged portion is a first engaging concave portion with which the first engaging convex portion engages, and the second engaging convex portion engages The length of the first engagement protrusion is longer than the length of the second engagement protrusion in the direction in which the backrest main body and the decorative member face each other. a pair of side portions having a length in one direction and being spaced apart from each other in the width direction; a connecting portion connecting one ends of the pair of side portions; and the first engaging projection and the second engaging projection of the engaging portion are provided between the decorative member and the backrest main body and at positions facing the pair of side portions. or the first engagement recess and the second engagement recess of the engaged portion are provided .

According to this configuration, by changing the lengths of the first engaging protrusions and the second engaging protrusions provided on the backrest main body or the decorative member, the positions of the corresponding engaging recesses can be adjusted. Since the decorative member can be attached to the backrest main body while confirming it, it is possible to prevent the engaging protrusions from being damaged by forcibly pushing the decorative member. As a result, the decorative member is less likely to come off from the backrest main body, and the decorative member can be stably attached to the backrest main body via the decorative member. Therefore, it is possible to keep the appearance of the backrest in good condition.

According to this configuration, by providing engagement points on both sides in the width direction, both sides in the width direction of the decorative member can be attached to the backrest main body, so that the decorative member can be attached in a more stable state. . In addition, according to the decorative member having the above-described configuration, compared to the case where the overall plate shape is formed, it is easier to operate the side portions on both sides individually. This makes it easier to engage the projections with the corresponding engagement recesses.

A backrest of a chair according to one aspect of the present invention includes a backrest main body having a front surface for supporting the back of a seated person, and a backrest main body disposed on the rear surface side of the backrest main body so that the front surface faces the rear surface of the backrest main body. an engaging portion provided on one of the backrest main body and the decorative member; and one of the backrest main body and the decorative member attached to the other. and an engaged portion that is provided and engaged with the engaging portion, the engaging portions being spaced apart from each other and first engaging projections projecting toward the engaged portion. and a second engaging convex portion, and the engaged portion is a first engaging concave portion with which the first engaging convex portion engages, and the second engaging convex portion engages The length of the first engagement protrusion is longer than the length of the second engagement protrusion in the direction in which the backrest main body and the decorative member face each other. In the width direction of the backrest, the second engaging protrusion having a relatively short length is opposed to the first engaging protrusion having a relatively long length. It is located outside .

According to this configuration, when the hand of the seated person touches the outer peripheral edge of the decorative member, even if a force is applied to the decorative member in a direction away from the backrest main body, the first engaging convex portion and the The state of engagement with the first engaging recess is less likely to be released, and the decorative member is less likely to come off from the backrest main body. As a result, the decorative member can be prevented from coming off from the backrest main body regardless of how the seated person uses it.

In one aspect of the present invention, the backrest of the chair may have a configuration in which at least one of the first engaging projections and the second engaging projections is provided in plurality.

With this configuration, since the number of engagement points between the backrest main body and the mounting member increases, the decorative member can be stably attached to the backrest main body via the mounting member.

In one aspect of the chair backrest of the present invention, the decorative member may be detachably provided with respect to the backrest main body.

According to this configuration, the impression of the appearance of the backrest can be easily changed simply by replacing the decorative member. Since the exterior design of the decorative member can be arranged, it is possible to provide a highly designed backrest according to the application.

In one aspect of the chair backrest of the present invention, the backrest main body has a face member forming the front surface of the backrest main body, and an outer peripheral frame member on which the face member is constructed. may be

According to this configuration, the front surface of the backrest main body that supports the back of the seated person is made of the face member stretched on the outer peripheral frame member, so that the back can be supported with appropriate elasticity.

A chair in one aspect of the present invention includes the above-described backrest.

According to this configuration, it is possible to provide a chair with a good-looking backrest.

According to one aspect of the present invention, there is provided a method for assembling a backrest of a chair, comprising the step of attaching a decorative member to a rear surface of a backrest body with the front surface thereof facing the backrest body, and The first engagement protrusion and the second engagement protrusion provided on one of the backrest main body and the decorative member are provided on the other of the backrest main body and the decorative member. When engaging with the engaging recesses, the second engaging protrusions relatively shorter in length than the first engaging protrusions are first engaged with the second engaging recesses , the first engaging protrusion relatively longer than the second engaging protrusion is engaged with the first engaging recess afterward, and the first engaging protrusion and A pair of each of the first engaging recesses are provided in the vertical direction, a pair of the second engaging protrusions and the second engaging recesses are provided in the vertical direction, and a pair of the first engaging recesses are provided. The mating protrusions are arranged inside the pair of second engagement protrusions in the vertical direction, and the pair of first engagement recesses are arranged vertically with respect to the pair of second engagement recesses. located inside the direction .

According to this configuration, after first engaging the second engagement protrusion with the short length with the second engagement recess, the first engagement protrusion is bent while the first engagement protrusion with the long length is bent. can be engaged with the engagement recess of the Since the first engaging protrusion can be engaged while confirming the position of the first engaging recess, the first engaging protrusion is pushed in before it can enter the first engaging recess. By doing so, it is possible to prevent the first engaging projection from being damaged. As a result, it is possible to provide a backrest assembling method that enables the work of attaching the decorative member to the backrest main body in a stable manner.

According to the present invention, a backrest in which a decorative member is satisfactorily attached to a backrest main body while preventing breakage of an engaging portion, a chair provided with the same, and a backrest main body without damaging the engaging portion To provide a method for assembling a backrest that enables stably mounting work of a decorative member to a backrest.

FIG. 1 is a front view showing the configuration of a chair in one aspect of the embodiment. FIG. 2 is a rear view showing the configuration of the chair in one aspect of the embodiment. FIG. 3 is a side view showing the configuration of the backrest of the chair in one aspect of the embodiment. FIG. 4 is a perspective view partially showing the configuration around the backrest supporting member in one aspect of the embodiment. FIG. 5 is a perspective view partially showing the configuration of the backrest supporting member in one aspect of the embodiment. FIG. 6 is a perspective view showing the configuration of the mounting member in one aspect of the embodiment. FIG. 7 is a perspective view showing the configuration of the mounting member in one aspect of the embodiment. 8 is a cross-sectional view taken along line AA of FIG. 5. FIG. FIG. 9 is a diagram for explaining a process of assembling the backrest in one aspect of the embodiment. FIG. 10 is a diagram for explaining a process of assembling the backrest in one aspect of the embodiment.

EMBODIMENT OF THE INVENTION Hereinafter, with reference to an accompanying drawing, the form for implementing the backrest and the chair provided with the same in this invention is demonstrated. However, the invention is not limited to this embodiment only. In addition, in each drawing below, in order to make each component easy to see, the scale of the dimensions may be changed depending on the component.

In the following description, the direction facing the front of a person seated in a normal posture with the back facing the backrest of the chair is called "front", and the direction opposite to it is called "rear". In addition, the upward direction of a person sitting on a chair in a normal posture is called "up", the opposite direction is called "down", the left side of a person sitting in a normal posture is called "left", and the right side is called "left". is called "right". Also, the lateral direction of the chair is called the "width direction".

Also, in the drawings, an XYZ coordinate system is appropriately shown as a three-dimensional orthogonal coordinate system. In the XYZ coordinate system, the "X direction" is a direction parallel to the "width direction" of the chair shown in FIG. The "Z direction" is a direction perpendicular to the X direction, which is the "vertical direction" in FIG. The “Y direction” is defined as the “front-rear direction” orthogonal to both the X direction and the Z direction.

FIG. 1 is a front view showing the configuration of a chair in one aspect of the embodiment. FIG. 2 is a rear view showing the configuration of the chair in one aspect of the embodiment. FIG. 3 is a side view showing the configuration of the backrest of the chair in one aspect of the embodiment. FIG. 4 is a perspective view partially showing the configuration around the backrest supporting member in one aspect of the embodiment. FIG. 5 is a perspective view partially showing the configuration of the backrest supporting member in one aspect of the embodiment. FIG. 6 is a perspective view showing the configuration of the mounting member in one aspect of the embodiment. FIG. 7 is a perspective view showing the configuration of the mounting member in one aspect of the embodiment. 8 is a cross-sectional view taken along line AA of FIG. 5. FIG. FIG. 9 is a diagram for explaining a process of assembling the backrest in one aspect of the embodiment. FIG. 10 is a diagram for explaining a process of assembling the backrest in one aspect of the embodiment.

As shown in FIGS. 1 and 2, the chair 1 of this embodiment includes legs 2 placed on the floor, box-shaped support bases 3 installed on the upper ends of the legs 2, and a seated person. A seat body 4 on which a person sits, a seat support member 5 that is attached to the upper surface of the support base 3 and supports the seat body 4, and a seat support member 5 that extends from the support base 3 to the rear upper side to support the back of the seated person seated on the seat body 4. a supporting backrest 6;

The leg portion 2 includes a manifold leg 7 with casters 7a, and a pedestal 8 erected from the central portion of the manifold leg 7 and incorporating a gas spring as an elevating mechanism.

The support base 3 is attached to the upper end of the pedestal 8 . The support base 3 incorporates an elevation adjustment mechanism for the pedestal 8 and a tilt adjustment mechanism for the backrest 6 .

As shown in FIG. 1 , the seat body 4 includes a seat body outer peripheral frame main body portion 13 forming a skeleton and a seat body surface material 14 stretched on the seat body outer peripheral frame main body portion 13 .

The seat outer peripheral frame body 13 is made of synthetic resin, for example, and has a substantially rectangular shape with four rounded corners when viewed from above. A groove 13m recessed inwardly of the seat outer peripheral frame main body portion 13 is continuously formed in the outer peripheral edge portion of the seat outer peripheral frame main body portion 13 in the circumferential direction.

The seat body surface member 14 has a mesh shape with a large number of holes, and is provided with a rim member (not shown) at the outer peripheral edge. The outer peripheral end portion of the seat body face member 14 is caught in the groove 13m formed in the seat body outer peripheral frame body portion 13, and the seat body outer frame body portion 13 is moved by the edge member inserted into the groove 13m. is fixed to

The backrest 6 supports the load from the back of the person seated on the seat body 4 . A portion of the backrest 6 is connected to a tilt adjustment mechanism within the support base 3 . Further, the support base 3 is provided with an operation knob 12 for operating the tilt adjustment mechanism, and the seated person operates this operation knob 12 to tilt the backrest 6 in the front-rear direction (Y direction). You can adjust the reaction force when you let it.

A specific configuration of the backrest 6 in this embodiment will be described below.
The backrest 6 includes a backrest main body 20, a decorative member 23, a backrest support member 22, an attachment member 24, and a gap forming member 26, as shown in FIGS.

[Backrest body]
The backrest main body 20 includes a backrest surface forming portion 21 and a backrest support member 22 .

(Back receiving surface constituent part)
As shown in FIGS. 1 and 2, the backrest surface forming portion 21 includes a backrest outer peripheral frame member (peripheral frame member) 28 and a backrest surface material (surface material ) 29 and

The backrest outer frame member 28 includes a pair of vertical rods 28a, 28a spaced apart in the width direction (X direction), an upper rod 28b, and a lower rod 28c. The backrest outer peripheral frame member 28 is formed into an annular frame shape as shown in FIGS. 1 and 2 by these vertical rods 28a, 28a, upper rod 28b, and lower rod 28c. The backrest outer frame member 28 is made of resin, aluminum alloy, or the like, for example. A groove 28m (FIG. 3) recessed toward the inside of the backrest outer peripheral frame member 28 is formed continuously in the outer peripheral edge portion of the backrest outer peripheral frame member 28 in the circumferential direction.

As shown in FIGS. 1 and 2, the backrest surface material 29 has a mesh shape with a large number of holes formed therein, and is provided with a rim (not shown) at the outer peripheral edge (not shown). The outer peripheral edge (not shown) of the backrest surface member 29 is caught in a groove 28m formed in the backrest outer peripheral frame member 28 shown in FIG. (not shown) is fixed to the backrest outer peripheral frame member 28 . The back of the person sitting on the seat body 4 contacts the backrest panel 29 forming the front surface 20 a of the backrest main body 20 . By providing the cloth-like backrest surface member 29 on the backrest outer peripheral frame member 28, the back of the seated person can be supported with appropriate elasticity.

(Backrest support member)
As shown in FIGS. 3 and 4, a backrest support member 22 is arranged on the rear surface 21b side of the backrest surface forming portion 21. As shown in FIGS. The backrest support member 22 supports the back support surface forming portion 21 described above. The backrest surface forming portion 21 is fixed to the backrest support member 22 via a plurality of fasteners. The fastener is composed of, for example, a set screw and a nut screwed thereon, and fastens the backrest support member 22 and the backrest outer peripheral frame member 28 . The set screws are inserted into a plurality of fixing holes 28g formed in the vertical rods 28a of the backrest outer peripheral frame member 28 shown in FIG. 4 and holes 22g formed in the backrest support member 22 shown in FIG. be done. It should be noted that the means for attaching the back support surface forming portion 21 and the backrest support member 22 is not limited to the fasteners described above. As shown in FIG. 4, the backrest outer peripheral frame member 28 is provided with a cover member 15 so as to hide the fixing holes 28g.

The backrest support member 22 also supports the seat body 4 . Although a detailed description of the means for attaching the backrest support member 22 and the seat body 4 is omitted, for example, fasteners such as those described above may be employed.

As shown in FIG. 2, the backrest support member 22 has a shape that follows a part of the outer shape of the backrest outer peripheral frame member 28 . As shown in FIGS. 2 and 3, the backrest support member 22 has a pair of side portions 22A, a first connecting portion 22B, a second connecting portion 22C, and a pair of extending portions 22D. there is 3, illustration of one side portion 22A and the extension portion 22D is omitted.

A pair of side portions 22A, 22A of the backrest support member 22 shown in FIG. 6 facing each other in the front-rear direction (Y direction). The backrest support member 22 includes a pair of side portions 22A, 22A extending in the vertical direction (Z direction), a first connecting portion 22B (FIG. 3) connecting the upper ends of the side portions 22A, 22A, and a lower end. A part thereof is formed in an annular shape as shown in FIG. Through the opening 22e of the backrest support member 22, the backrest surface member 29 of the backrest surface forming portion 21 is exposed.

3 and 4, the backrest support member 22 has a pair of side portions 22A bent at predetermined positions in the extending direction thereof, and the second connecting portion 22C and the pair of extending portions 22A. The portion 22D faces the lower surface side of the seat body 4 shown in FIGS.

(Decorative member)
As shown in FIGS. 3 and 4, the decorative member 23 is arranged on the back surface 20b (FIG. 2) side of the backrest main body 20, and is provided on the backrest main body 20 with the front surface 23a facing the rear surface 20b. there is Specifically, the decorative member 23 is attached to the backrest supporting member 22 so as to partially cover the rear surface 22b (FIG. 5).

The decorative member 23, as shown in FIG. 2, has a pair of side portions 23A, 23A and a connecting portion 23B. A pair of side portions 23A, 23A spaced apart in the width direction (X direction) extend in the vertical direction (Z direction), and upper ends thereof are connected by a connection portion 23B extending in the width direction. The decorative member 23 has a downwardly open shape due to the pair of side portions 23A, 23A and the connecting portion 23B. The pair of side portions 23A, 23A and the connecting portion 23B of the decorative member 23 face the pair of side portions 22A, 22A and the first connecting portion 22B of the backrest support member 22, respectively.

The decorative member 23 is attached so as to hide at least the area of the rear surface 22b (FIG. 5) of the backrest support member 22 where the recessed portion 22f is formed. Therefore, it is preferable that the decorative member 23 has a size such that the cutout portion 22f of the backrest support member 22 does not protrude from the decorative member 23 when the chair 1 is viewed from the back side. .

As shown in FIG. 3, the decorative member 23 has a pair of side portions 23A, 23A whose lower ends are curved following the bent shape of the side portion 22A of the backrest support member 22. As shown in FIG. Therefore, when the decorative member 23 is attached to the backrest support member 22, the pair of side portions 23A, 23A of the decorative member 23 enter below the side portions 22A, 22A of the backrest support member 22. As shown in FIG. As a result, the decorative member 23 can entirely cover the rear surface 22b of the backrest support member 22, so that the appearance of the back side of the chair 1 can be improved.

Such a decorative member 23 is attached to the backrest support member 22 via a pair of attachment members 24, 24 arranged on both sides in the width direction, as shown in FIG.

(Mounting member)
A pair of mounting members 24, 24 are arranged between a rear surface 22b (FIG. 4) of the backrest support member 22 and a front surface 23a (FIG. 4) of the cosmetic member 23. As shown in FIG. As shown in FIGS. 1 and 5, the mounting member 24 is mounted between the decorative member 23 and the backrest support member 22, and the side portions 23A and 23A of the decorative member 23 and the side portions 22A and 22A of the backrest support member 22 are mounted on the respective sides. 22A in the front-rear direction (Y direction). The above-described decorative member 23 has a front surface 23a (FIG. 4) opposed to each of the rear surfaces 24d of the pair of mounting members 24 arranged on both sides in the width direction. is attached to each mounting member 24 using

As shown in FIG. 6, the mounting member 24 includes a rectangular flat portion 24A, a pair of first engaging protrusions (engaging portions) 16A, 16A, and a pair of second engaging protrusions (engaging portions). Joint portion) 16B, 16B. The first engaging projections 16A, 16A are provided on one long side 24a in the width direction of the plane portion 24A, and are spaced apart from each other in the length direction of the plane portion 24A. The second engaging projections 16B, 16B are provided on the other widthwise long side 24b side of the plane portion 24A, and are spaced apart from each other in the length direction of the plane portion 24A.

The arrangement interval between the first engaging projections 16A, 16A is narrower than the arrangement interval between the second engaging projections 16B, 16B, and the first engaging projections 16A and the second engaging projections 16A The positional relationship with the engaging convex portion 16B is shifted in the length direction of the flat portion 24A.

As shown in FIG. 6, the second engaging protrusions 16B, 16B are arranged at both longitudinal ends of the plane portion 24A. The first engaging projections 16A, 16A are arranged closer to the center in the longitudinal direction of the planar portion 24A than the second engaging projections 16B, 16B.

As shown in FIG. 7, the first engaging convex portion 16A and the second engaging convex portion 16B protrude from the front surface 24c side of the mounting member 24 toward the backrest support member 22, and the flat portion 24A It extends diagonally outward from both sides in the width direction at predetermined angles .theta.1 and .theta.2 with respect to the front surface 24c. Each of the engaging projections 16A and 16B has a curved portion 16d at its root portion that allows bending with respect to the flat portion 24A.

The first engaging convex portion 16A and the second engaging convex portion 16B have an extension length from the flat portion 24A in the direction (Y direction) in which the backrest support member 22 and the mounting member 24 face each other. However, the length L1 of the first engaging protrusion 16A is longer than the length L2 of the second engaging protrusion 16B (L1>L2).

The first engaging convex portion 16A includes an extension portion 16a1 extending from the flat portion 24A and a tip of the extension portion 16a1 protruding outward in the width direction of the flat portion 24A (outer than the long side 24a). and a claw portion 16a2. The second engaging convex portion 16B includes an extension portion 16b1 extending from the flat portion 24A and a tip of the extension portion 16b1 protruding outward in the width direction of the flat portion 24A (outer than the long side 24b). and a claw portion 16b2. The end surfaces of the claw portions 16a2 and 16b2 of the engaging projections 16A and 16B on the flat portion 24A side form engaging surfaces 16V that engage with the backrest support member 22, respectively.

As shown in FIG. 5, such an attachment member 24 is attached to the rear surface 22b of the backrest support member 22 with the front surface 24c (FIG. 7) facing the rear surface 22b. As shown in FIG. 5, the backrest support member 22 has first engaging projections corresponding to the first engaging projections 16A, 16A and the second engaging projections 16B, 16B of the mounting member 24 described above. Concave portions (engaged portions) 22J, 22J and second engaging concave portions (engaged portions) 22K, 22K are formed. The second engaging protrusions 16B, 16B are inserted into and engaged with the first engaging recesses 22J, 22J of the backrest support member 22, and the second engaging protrusions 16B, 16B engage with the second engaging recesses 22K, 22K of the backrest support member 22. is inserted into and engaged with.

At this time, as shown in FIGS. 7 and 8, the engagement surfaces 16V of the engagement projections 16A and 16B on the mounting member 24 side are aligned with the engagement surfaces of the engagement recesses 22J and 22K on the backrest support member 22 side. 22V in the front-rear direction (Y-direction) of the backrest 6 and are in surface contact with each other to ensure an engaged state. FIG. 8 shows the engagement state between the second engaging protrusion 16B and the second engaging recess 22K, but the first engaging protrusion 16A and the first engaging recess 22J are in an engaged state. The same applies to the engaged state.

Next, a method for assembling the backrest 6 will be described.
The method of assembling the backrest 6 of the present embodiment includes the step of attaching the backrest surface forming portion 21 to the front surface 22a of the backrest support member 22, and the step of facing the rear surface 22b of the backrest support member 22 with the front surface 24c facing the rear surface 22b. A step of attaching the mounting member 24, and a step of attaching the decorative member 23 to the rear surface 24d of the mounting member 24 with the front surface 23a opposed thereto.

In this embodiment, among the steps of assembling the backrest 6, the step of attaching the mounting member 24 to the backrest support member 22 is characteristic. Therefore, the mounting process of the mounting member 24 will be mainly described in detail, and other processes will be briefly described.

First, the back support surface forming portion 21 is attached to the front surface 22a side of the backrest support member 22 via a plurality of fasteners. Subsequently, the cover member 15 is attached to the front surface 22a side of the backrest support member 22 so as to hide the fastening portion.

Next, the two mounting members 24, 24 are mounted on the rear surface 22b side of the backrest supporting member 22. As shown in FIG. In this embodiment, one attachment member 24 is attached to each of the side portions 22A, 22A of the backrest support member 22, but the procedure for attaching each attachment member 24 is the same.

When attaching the mounting member 24 to the backrest support member 22, first, the front surface 24c of the mounting member 24 shown in FIGS. At this time, the mounting member 24 is arranged to face the backrest support member 22 with the second engaging protrusions 16B facing outward in the width direction and the first engaging protrusions 16A facing inward in the width direction. .

Next, among the mounting members 24 arranged on the rear surface 22b side of the backrest support member 22, first, the short second engaging projections 16B, 16B are attached to the backrest support member 22 shown in FIG. They are respectively inserted into the second engaging recesses 22K, 22K.

After that, as shown in FIG. 10, the positions of the first engagement concave portions 22J and 22Jm of the backrest support member 22 are confirmed, and the first engagement convex portions 16A and 16A of the mounting member 24 are bent while the backrest is adjusted. The claws 16 a 2 and 16 a 2 are inserted into the first engaging recesses 22 J and 22 J of the lean support member 22 .

When the claws 16a2, 16a2 of the first engaging protrusions 16A, 16A are inserted into the first engaging recesses 22J, 22J on the side of the backrest support member 22, the flat portion 24A of the mounting member 24 engages the backrest support member. 22 and becomes substantially parallel to the rear surface 22b.

When the first engaging protrusions 16A, 16A are inserted into the first engaging recesses 22J, 22J, the engaging surfaces 16V, 16V of the claws 16a2, 16a2 are positioned on the backrest support member 22 side. and the engaging surface 22V of the backrest 6 in the front-rear direction (Y direction).

When the second engaging protrusions 16B, 16B are inserted into the second engaging recesses 22K, 22K, the engaging surfaces 16V, 16V of the claws 16b2, 16b2 are positioned on the backrest support member 22 side. is opposed to the engaging surface 22V of the .

Due to the reaction force accompanying the flexural deformation of the first engaging projections 16A, 16A and the second engaging projections 16B, 16B, the mounting member 24 side is pushed against the backrest support member 22 side engaging surface 22V. Each engaging surface 16V engages in a state in which substantially the entirety of the engaging surface 16V is in close contact. In this manner, the mounting member 24 is mounted on the rear surface 22b side of the backrest support member 22. As shown in FIG.

Next, after mounting the mounting members 24 on both sides of the backrest supporting member 22 in the width direction one by one, the decorative members 23 are mounted on the respective mounting members 24 , 24 . At this time, the side portions 23A, 23A on both sides in the width direction of the decorative member 23 are attached to the mounting members 24, 24, respectively.
In this manner, the decorative member 23 is attached to the rear surface 22b of the backrest support member 22 via the pair of attachment members 24, 24, with the front surface 23a opposed to the back surface 22b.

As described above, in the assembling method of the present embodiment, when attaching the attachment member 24 to the backrest support member 22, first, the second engagement portion of the attachment member 24 having a relatively short length is attached. The convex portion 16B is engaged with the second engagement concave portion 22K of the backrest support member 22, and then the backrest support member 22 is bent while the relatively long first engagement convex portion 16A side is bent. is engaged with the first engaging recess 22J.

As a result, even after the attachment member 24 is positioned with respect to the backrest support member 22 by the second engagement projection 16B, the first engagement projection 16A can be operated while confirming the position of the first engagement recess 22J. can be engaged, the work of attaching the attachment member 24 to the backrest support member 22 can be performed efficiently.

Further, since the first engaging convex portion 16A and the second engaging convex portion 16B of the mounting member 24 extend outward in the width direction of the flat portion 24A, they are hidden behind the flat portion 24A during the mounting work. Therefore, the engagement projections 16A and 16B are not obscured. Therefore, the operator checks the positions of the claws 16a2 and 16b2 of the engaging projections 16A and 16B on the mounting member 24 side and the positions of the engaging recesses 22J and 22K on the backrest support member 22 side. Installation work can be done. As a result, the engaging protrusions 16A and 16B are not forced into the engaging recesses 22J and 22K before they can be completely inserted into the engaging recesses 22J and 22K. Damage to the portions 16A and 16B can be prevented.

In the present embodiment, each of the engaging projections 16A and 16B has a curved portion 16d at the base portion thereof, and compared to a configuration without the curved portion 16d, the structure is more flexible with respect to the flat portion 24A of the mounting member 24. It's becoming The first engaging projection 16A having a length is particularly easy to bend, and even if the second engaging projection 16B is engaged with the backrest support member 22 first, the backrest support member 22 can be bent afterward. It is easy to insert the first engagement protrusion 16A into one engagement recess 22J. As a result, the mounting work can be performed efficiently.

In addition, by arranging the mounting members 24 on each of the side portions 22A, 22A on both sides in the width direction of the backrest support member 22, the decorative member 23 can be stably mounted via each mounting member 24, and the backrest can be secured. It is possible to prevent the attachment member 24 from being displaced from the support member 22 and falling off.

Also, if the length of all the engaging projections provided on the mounting member is long as in the conventional configuration, the seated person sitting on the chair 1 can turn his or her hand behind the backrest 6 . In this case, when the outer peripheral edge of the decorative member 23 is touched with a hand, a force is likely to be applied in the direction in which the mounting member 24 is removed from the backrest support member 22, and the mounting member 24 is removed from the backrest support member 22.例文帳に追加something happened.

On the other hand, the mounting member 24 of the present embodiment has engaging projections 16A and 16B with different lengths. For this reason, by arranging the mounting member 24 with the relatively short second engaging projection 16B facing the backrest support member 22 toward the outside in the width direction of the backrest support member 22, , the engagement state between the second engagement projection 16B and the second engagement recess 22K is less likely to be released, and these engagement states can be maintained.

This prevents the attachment member 24 from coming off the backrest support member 22 , and the decorative member 23 can be securely attached to the backrest support member 22 . As a result, the decorative member 23 is less likely to come off from the backrest supporting member 22 regardless of how the seated person uses it, and the chair 1 with good usability can be provided.

In addition, since the first engaging projections 16A, 16A of the mounting member 24 are arranged closer to the center in the longitudinal direction inside the plane portion 24A than the second engaging projections 16B, 16B, the first engaging projections 16A, 16A When the engaging projections 16A, 16A are engaged later, the planar portion 24A is suppressed from being bent by the pushing force, so that the engaging projections 16A can be easily engaged with a small force.

The mounting member 24 of this embodiment is provided with a pair of engaging projections 16A and 16B having different lengths. Not limited to things. By providing a plurality of engaging projections 16A and 16B on at least one side, the number of engagement points between the backrest support member 22 and the mounting member 24 increases. The decorative member 23 can be stably attached via the members 24 , 24 . In addition, since the mounting strength between the backrest support member 22 and the mounting member 24 can be ensured, the decorative member 23 can be prevented from rattling or shifting.

Also, the decorative member 23 of the present embodiment may be detachably attached to the attachment member 24 . That is, by adopting a configuration in which the decorative member 23 can be freely removed from the backrest support member 22, the decorative member 23 can be replaced as appropriate.

Thus, the appearance of the chair 1 can be easily changed only by replacing the decorative member 23. - 特許庁Since the impression of the appearance of the chair 1 changes depending on the design of the decorative member 23, the optimal design can be selected according to various uses by replacing the decorative member 23 with a different design as required. In this way, by providing the backrest 6 whose appearance design can be arranged and whose design is excellent, it is possible to provide the chair 1 suitable for a wide range of uses according to the desires of the seated person.

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. It is obvious that a person skilled in the art can conceive of various modifications or modifications within the scope of the technical idea described in the claims, and these are also within the technical scope of the present invention. be understood to belong to

In the above-described embodiment, a deformable elastic member is used as the gap forming member 26, but a spacer made of a non-deformable material may be used. As long as the gap 10 of a predetermined size can be formed between the backrest supporting member 22 and the decorative member 23, the elastic member is not the only one.

Further, in the above-described embodiment, the gap forming member 26 is provided on the front surface 24c of the mounting member 24, but may be provided on the rear surface 22b of the backrest support member 22. FIG. Alternatively, instead of being provided in advance on either one of the mounting member 24 and the backrest support member 22, it may simply be interposed between them.

In the above-described embodiment, the engagement protrusion is provided on the mounting member 24 side and the engagement recess is provided on the backrest support member 22 side, but this is not the only option. For example, a configuration may be adopted in which an engaging concave portion is provided on the mounting member 24 side and an engaging convex portion is provided on the backrest supporting member 22 side.

Alternatively, one of the engaging projection and the engaging recess may be formed integrally with the decorative member 23, and the other of the engaging projection and the engaging recess may be formed with the backrest support member 22. . As a result, the mounting member 24 becomes unnecessary, and the number of parts and cost can be suppressed.

DESCRIPTION OF SYMBOLS 1... Chair 10... Gap 16A... First engagement convex part (engagement part) 16B... Second engagement convex part (engagement part) 18... Auxiliary locking means 20... Backrest main body , 20a front surface of backrest main body 20b rear surface of backrest main body 21 back support surface forming portion 21b rear surface of back support surface forming portion 22 backrest support member 22b front surface of backrest support member , 22b... the rear surface of the backrest supporting member, 22A... the side portion of the backrest supporting member, 22J... the first engagement concave portion (engaged portion), 22K... the second engagement concave portion (engaged portion), 23 Decorative member 23A Side portion 23B Connecting portion 23a Front surface of decorative member 23b Rear surface of decorative member 23d Peripheral edge portion 24 Mounting member 24d Rear surface of mounting member 26 Gap Forming member 28... Backrest outer frame member (peripheral frame member) 29... Backrest surface material (surface material)

Claims (7)

a backrest body having a front surface supporting the back of a seated person;
a decorative member disposed on the rear surface side of the backrest main body and attached to the rear surface of the backrest main body with the front surface facing the rear surface;
an engaging portion provided on one of the backrest main body and the decorative member;
an engaged portion provided on the other of the backrest main body and the decorative member and with which the engaging portion is engaged;
The engaging portion includes a first engaging convex portion and a second engaging convex portion that are spaced apart from each other and protrude toward the engaged portion,
The engaged portion comprises a first engagement recess with which the first engagement projection engages and a second engagement recess with which the second engagement projection engages,
In the direction in which the backrest main body and the decorative member face each other, the length of the first engaging protrusion is longer than the length of the second engaging protrusion,
The decorative member has a pair of side portions having a length in one direction and spaced apart from each other in the width direction, and a connecting portion connecting one end sides of the pair of side portions. ,
The first engaging projection and the second engaging projection of the engaging portion are provided at positions facing the pair of side portions between the decorative member and the backrest main body, respectively. or provided with the first engaging recess and the second engaging recess of the engaged portion, respectively . a backrest body having a front surface supporting the back of a seated person;
a decorative member disposed on the rear surface side of the backrest main body and attached to the rear surface of the backrest main body with the front surface facing the rear surface;
an engaging portion provided on one of the backrest main body and the decorative member;
an engaged portion provided on the other of the backrest main body and the decorative member and with which the engaging portion is engaged;
The engaging portion includes a first engaging convex portion and a second engaging convex portion that are spaced apart from each other and protrude toward the engaged portion,
The engaged portion comprises a first engagement recess with which the first engagement projection engages and a second engagement recess with which the second engagement projection engages,
In the direction in which the backrest main body and the decorative member face each other, the length of the first engaging protrusion is longer than the length of the second engaging protrusion,
In the engaging portion, in the width direction of the backrest, the second engaging convex portion having a relatively short length extends outwardly with respect to the first engaging convex portion having a relatively long length. Located on the backrest of the chair. At least one of the first engaging convex portion and the second engaging convex portion is provided in plurality,
A chair backrest according to claim 1 or claim 2 . The backrest of a chair according to any one of claims 1 to 3 , wherein the decorative member is detachably provided with respect to the backrest main body. 5. The backrest body according to any one of claims 1 to 4 , wherein the backrest body has a face member forming the front surface of the backrest body, and an outer peripheral frame member on which the face member is constructed. chair backrest. A chair comprising a backrest according to any one of claims 1-5 . a step of attaching a decorative member to the rear surface of the backrest body with the front surface facing the back surface;
A first engaging projection and a second engaging projection provided on one of the backrest main body and the decorative member are attached to the other of the backrest main body and the decorative member. When engaging with the provided first engagement recess and second engagement recess, the second engagement protrusion relatively shorter in length than the first engagement protrusion is first engaged. The second engagement recess is engaged with the second engagement recess afterward, and the first engagement protrusion, which is relatively longer than the second engagement protrusion, is engaged with the first engagement recess afterward. put together ,
A pair of the first engaging protrusion and the first engaging recess are provided in the vertical direction,
A pair of the second engaging protrusion and the second engaging recess are provided in the vertical direction,
The pair of first engaging protrusions are arranged inside the pair of second engaging protrusions in the vertical direction,
The pair of first engaging recesses are arranged inside the pair of second engaging recesses in the vertical direction ,
How to assemble the backrest.

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