JP2007330398A - Chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chair with a back board which prevents a displacement of a cushion body with respect to a base plate and the loss of the shape of the cushion body and deteriorates no elasticity of the base plate. <P>SOLUTION: In the back board 4 of the chair, an intermediate plate 7 is provided between the elastically-deformable base plate 5 in which many slits or holes are drilled, and the cushion body 6 which is arranged ahead of the base plate 5. The intermediate plate 7, which has a frame-like peripheral edge 17 formed in such an outer shape as to almost fit the basic outer shape of the cushion body 6, is formed in such a manner as to be elastically deformable while almost following the elastic deformation of the base plate 5. A peripheral edge 8a of a skin material 8 for covering the cushion body 6 from a front side is attached to the peripheral edge 17 of the intermediate plate 5. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a chair having a backrest adapted to be adapted to the shape of the back of a seated person.

  In general, it is desirable that the backrest of the chair changes and adapts to the body of the seated person. Conventionally, many chairs have been proposed in which the flexion shape of the backrest changes according to the body of the seated person. (For example, refer to Patent Document 1).

In addition, a chair provided with a backrest in which a surface of an elastically deformable substrate in which a large number of slits or holes are formed is covered with a cushion body has also been proposed by the present applicant (see, for example, Patent Document 2). Thus, the backrest board having a large number of slits or holes drilled can be flexed well, and can be suitably fitted to the seated person's body together with the cushion body disposed in front of the board. A comfortable seating feeling can be obtained without pressing the back of the seated person.
JP 2001-128806 A JP 2001-190873 A

  However, since the chairs described in Patent Document 1 and Patent Document 2 have a structure in which a cushion body called loose tension is only placed on the surface of the elastically deformable substrate, the cushion body is elastic of the substrate. Although it can be deformed following the deformation, a displacement occurs with respect to the substrate, and the shape is easily deformed.

  Thus, as a method of correctly holding the shape of the cushion body and attaching it to the substrate without deviation, it is conceivable to provide an intermediate plate between the surface of the substrate and the cushion body. However, in this case, there arises a new problem that the characteristics of the substrate that can be elastically deformed by forming a large number of slits or holes are obstructed by the intermediate plate and the effect is reduced.

  The present invention has been made in order to solve the above-described conventional problems. The chair has a backrest that prevents the cushion body from being displaced or deformed with respect to the substrate and does not deteriorate the elastic characteristics of the substrate. The purpose is to provide.

According to the present invention, the above problem is solved as follows.
(1) An intermediate plate is provided between an elastically deformable substrate having a large number of slits or holes, and a cushion body disposed in front of the substrate. It has a frame-shaped peripheral edge that has an outer shape substantially matched to the outer shape, and is formed to be elastically deformable substantially following the elastic deformation of the substrate, and the peripheral edge of the skin material covering the cushion body from the front is the peripheral edge of the intermediate plate It has a backrest constructed by attaching it to the part.

(2) In the above item (1), a part of the skin material is attached to one end portion, the other end portion is inserted from the surface of the cushion body to the back surface side, and the part of the skin material is directed in the direction of the cushion body. A pull-in tool adapted to be pulled in, and an engaging portion for engaging the other end of the pull-in tool, and the left and right end portions in the vertical direction at the left and right vertical edges of the peripheral edge of the middle plate An intermediate connecting portion connected to each intermediate portion is provided on the intermediate plate.

(3) In the above item (2), the left and right ends of the intermediate connecting portion of the intermediate plate are bifurcated in the vertical direction toward the outside, and the free ends thereof are respectively connected to the left and right vertical edges of the intermediate plate. A connected branch is provided.

(4) In the above item (2) or (3), the peripheral edge portion and the intermediate connection portion are integrally formed.

(5) In any one of the above items (1) to (4), the substrate can be attached to and detached from the peripheral portion of the intermediate plate by the engagement protrusion and the engagement hole respectively provided as the locking means on the substrate and the intermediate plate. Attach to.

(6) In any one of the above items (1) to (5), by pulling a part of the skin material inward of the cushion body by the retracting tool, the pulling portion that faces the backrest in the left-right direction when viewed from the front. Provide.

According to the first aspect of the present invention, since the intermediate plate has a frame shape, the most important part of the substrate for changing and adapting to the body of the seated person, that is, a large number of slits or holes are formed. Since the middle plate itself is formed so as to be elastically deformable without adversely affecting the elastic properties of the portion and substantially following the elastic deformation of the substrate, the middle plate may hinder the elastic properties of the substrate. Absent.
On the other hand, the cushion body is provided with a center plate having an outer shape substantially matching the basic outer shape of the cushion body as a core material, and the periphery of the skin material covering the cushion body from the front is attached to the peripheral portion of the middle plate Therefore, the cushion body is firmly held on the middle plate by this skin material, and is not displaced with respect to the middle plate, and the displacement of the cushion body is also suppressed.

  According to the invention described in claim 2, the skin material can be stretched on the surface of the cushion body without reducing the elastic deformation characteristics of the substrate.

  According to the third aspect of the present invention, since the external force applied to the connecting portion between the branch portion and the left and right vertical edge portions in the intermediate connecting portion is dispersed in the upper and lower connecting portions, a high strength connecting structure is obtained.

  According to the fourth aspect of the present invention, since the intermediate connecting portion and the peripheral portion are integrally formed, manufacturing is easy and strength at the connecting portion is improved.

  According to the fifth aspect of the present invention, the peripheral edge of the intermediate plate and the substrate can be easily attached / detached via the locking means, so that workability is improved.

  According to the sixth aspect of the present invention, even if the cushion body is elastically deformed together with the substrate and the intermediate plate, it is possible to prevent the cushion body from being displaced or deformed with respect to the substrate, and the skin material is stretched in a predetermined shape. A chair with a good looking back is obtained.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a rear view of a chair according to an embodiment of the present invention. The chair (1) includes a backrest (4) attached to a back frame (3) rotatably disposed on a leg (2).

  2 is an enlarged view of the main part of the backrest (4) viewed from the back side, FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2, and FIGS. 4, 5, and 6 are virtual views in FIG. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 3, and FIGS. 8 and 9 are enlarged views of main parts in virtual circles VIII and IX in FIG. 10 is a cross-sectional view taken along the line XX of FIG. 2, FIGS. 11 and 12 are enlarged views of main parts in the virtual circles XI and XII in FIG. 10, respectively, and FIGS. 13 and 14 are the front side and the back side, respectively. It is the disassembled perspective view of the backrest (4) seen more.

  As shown in FIGS. 13 and 14, the backrest (4) includes a substrate (5), a cushion body (6) disposed in front of the substrate (5), and the substrate (5) and the cushion body. (6), and the surface of the cushion body (6) is covered with a skin material (8).

  As shown in FIGS. 2 and 14, the substrate (5) has an upper mounting portion (9) and a lower mounting portion (10) on the left and right side portions on the back side, and these upper mounting portions (9). And the lower mounting part (10), as shown in FIG. 1, are fixed to the back frame (3) by being fixed to the pair of left and right base rods (3a) (3a) in the back frame (3). Yes.

  The substrate (5) is an integrally molded product made of synthetic resin, and as shown in the detailed structure in FIG. 2, the shell upper part (11) provided with a punching mesh (11a) formed with a large number of slits or holes. It consists of a shell middle part (12) and a shell lower part (13) with punched meshes (12a) and (13a) of slightly different shapes, respectively, and the whole is elastically deformable and matches the body shape of the seated person Thus, a smooth bending in the front-rear direction can be obtained.

  On the back surface of the substrate (5), engaging projections (14), (15) having different shapes are formed on the peripheral portion (5a) surrounding the regions of the shell portions (11), (12), and (13) in a frame shape. Are provided. As shown in FIG. 13, a pair of engaging protrusions (14) are provided on the upper part in the peripheral edge portion (5a) so as to be separated from each other in the left-right direction. These engaging protrusions (14) protrude from the base plate (5) forward at a substantially right angle, and at the tip end, a hook-like hooking claw that protrudes at a substantially right angle toward the outside. (14a) is provided. On the other hand, a plurality of engaging protrusions (15) are provided at predetermined intervals in spaced positions within the peripheral edge (5a). These engaging protrusions (15), like the engaging protrusions (14), protrude from the substrate (5) toward the front at a substantially right angle, and protrude from the front end portion at a substantially right angle toward the outside. A hook-shaped locking claw (15a) is provided.

  The middle plate (7) is also an integrally molded product made of synthetic resin, and substantially corresponds to the frame-shaped peripheral edge (5a) of the substrate (5), and left and right vertical edges (17a) (17a) and A peripheral edge portion (17) formed in a frame shape having substantially the same size as the peripheral edge portion (5a) of the substrate (5) by the upper and lower horizontal edge portions (17b) (17b), and the peripheral edge portion (17) And an intermediate connecting portion (18) for connecting intermediate portions in the vertical direction of the left and right vertical edge portions (17a) and (17a). The outer shape of the peripheral edge portion (17) is substantially matched to the basic outer shape of the cushion body (6) so as to be a core material of the cushion body (6).

  Engagement holes (19) and (20) having different shapes are formed in the peripheral edge (17) of the intermediate plate (7). The engagement holes (19) are provided at the left and right positions of the upper lateral edge (17b) corresponding to the engagement protrusions (14) of the substrate (5). On the other hand, there are a plurality of engagement holes (20) corresponding to the engagement protrusions (15) of the substrate (5) on the left and right vertical edges (17a) (17a) and the upper and lower edges (17b) (17b). Is provided.

  The engagement hole (19) penetrates in the front-rear direction and, as shown in FIG. 13, is slightly larger than the engagement claw (14a) of the engagement projection (14), and the engagement claw (14a) passes therethrough. A large hole (19a) having a possible size and a size slightly smaller than the locking claw (14a) and slightly larger than the engagement protrusion (14), and above the large hole (19a) And a small hole portion (19b) extending continuously toward.

  On the other hand, the engagement hole (20) is penetrated in the front-rear direction, has an inner diameter slightly smaller than the engagement claw (15a) of the engagement projection (15), and the engagement claw (15a) is detached. It is formed in a shape that can be snapped. The engagement hole (19) of the intermediate plate (7) forms a locking means together with the engagement protrusion (14) of the substrate (5). Similarly, the engagement hole (20) of the intermediate plate (7) The engaging means is formed together with the engaging protrusion (15) of 5).

  FIG. 15 is an enlarged exploded perspective view of a main part showing a middle plate (7) and a retracting tool (22) to be described later as seen from the front side. As shown in FIG. 15, the left and right end portions of the intermediate connecting portion (18) are formed in a bifurcated shape with a branching portion (18a) and a branching portion (18b) projecting outward in the vertical direction. The free ends of the two branch portions (18a) and (18b) are connected to the middle portion in the vertical direction of the left and right vertical edge portions (17a) of the middle plate (7). The branch portions (18a) and (18b) disperse the external force applied to the connecting portion between the intermediate connecting portion (18) and the vertical edge portions (17a) and (17b) in the upper and lower connecting portions, respectively. Strength is increased.

  On the other hand, three locking holes (21) penetrating in the front-rear direction and having a slit shape extending in the left-right direction are formed in the central portion of the intermediate connecting portion (18). In these locking holes (21), the rear end of the retractor (22) whose front end side is connected to a part of the skin material (8) can be locked.

  The retractor (22) corresponds to the main body part (22a) extending in the left-right direction and the three locking holes (21) of the intermediate connection part (18), respectively, and is rearward from the rear end of the main body part (22a). It consists of three locking pieces (22b) projecting toward it. As shown in FIGS. 3 and 6, the rear end of each locking piece (22 b) passes through the locking hole (21), and is retained and locked on the back side of the intermediate connecting portion (18). The claw portion (22c) is integrally formed. The front end portion of the retractor (22) can be attached to a portion that requires pulling of the skin material (8).

  Next, an example of the assembly procedure of the backrest (4) will be described. First, the cushion body (6) is arranged on the front surface of the middle plate (7) so as to cover the front surface of the middle plate (7), and the skin material (8) is further covered from the front outer side of the cushion body (6). At this time, the front end portion of the retractor (22) is attached to a portion where the skin material (8) needs to be pulled.

  Next, the retractor (22) is inserted from the front into the rearward cut (23) extending in the left-right direction of the cushion body (6), and the locking piece (22b) at the rear end of the retractor (22) is inserted. The intermediate coupling portion (18) is inserted into the locking holes (21), and the back side of the intermediate coupling portion (18) is engaged with the claw portion (22c) of the locking piece (22b) to prevent the intermediate coupling portion (18) from coming off. To do. Thus, the cushion body (6) and the skin material (8) are provided on the surface of the backrest (4) in a state in which the pulling portion (24) of the skin material (8) extending in the left-right direction in the front view is provided. Is fixed to the middle plate (7).

  Next, as shown in FIG. 8, the peripheral edge (8a) of the skin material (8) is wound around the back side of the intermediate plate (7), and the peripheral edge (8a) is placed on the peripheral edge (17) of the intermediate plate (7). Stop with the Tucker needle (25). Thereby, the intermediate plate (7), the cushion body (6), and the skin material (8) are integrated.

  Subsequently, the substrate (5) is attached to the middle plate (7) from behind the middle plate (7). In FIG. 13, first, the engagement protrusion (14) of the substrate (5) is made to correspond to the large hole portion (19a) of the engagement hole (19) of the intermediate plate (7), and further, the upper portion of the substrate (5) is arranged. Close to the middle plate (7), the locking claw (14a) is penetrated to the front side of the middle plate (7).

  Next, when the substrate (5) is slid upward with respect to the middle plate (7), the engagement protrusion (14) is moved into the small hole portion (19b), and the locking claw (14a) is moved into the middle. The front side of the plate (7) is engaged. In this state, the engagement protrusion (15) of the substrate (5) corresponds to the engagement hole (20) of the intermediate plate (7), and this engagement protrusion (15) is connected to the intermediate plate (7) side. When the base plate (5) is pressed strongly together, the engaging claw (15a) of the engaging projection (15) is press-fitted into the engaging hole (20) of the intermediate plate (9) and snap-engaged. Thereby, the board (5) is fixed to the middle plate (7), and the assembly of the backrest (4) is completed. The peripheral edge (8a) of the skin material (8) is sandwiched between the intermediate plate (7) and the substrate (5) and hidden from the outside. Further, as shown in FIG. 1, the backrest (4) assembled in this way is fixedly attached to the base collar (3a) of the back frame (3).

  The intermediate plate (7) is formed in a frame shape and substantially follows the elastic deformation of the substrate (5) so that it can be elastically deformed. Therefore, the intermediate plate (7) is placed between the substrate (5) and the cushion body (6). Even if the intermediate plate (7) is provided, the backrest (4) which does not hinder the original elastic characteristics of the substrate (5) can be obtained.

  On the other hand, the cushion body (6) is attached to an intermediate plate (7) having an outer shape matching the basic outer shape of the cushion body (6), and also covers the cushion body (6) from the front. Since the peripheral edge (8a) is attached to the peripheral edge (17) of the middle plate (7), the cushion body (6) is not displaced from the middle plate (7), and the cushion body (6) is not deformed. It can be suppressed.

It is a rear view of the chair shown as one Embodiment of this invention. It is the principal part enlarged view of the backrest in the same chair seen from the back side. It is the III-III sectional view taken on the line of FIG. FIG. 4 is an enlarged view of a main part in a virtual circle IV in FIG. 3. FIG. 4 is an enlarged view of a main part in a virtual circle V in FIG. 3. FIG. 4 is an enlarged view of a main part in a virtual circle VI in FIG. 3. It is the VII-VII sectional view taken on the line of FIG. It is a principal part enlarged view in the virtual circle VIII in FIG. It is a principal part enlarged view in the virtual circle IX in FIG. It is the XX sectional view taken on the line of FIG. It is a principal part enlarged view in the virtual circle XI in FIG. It is a principal part enlarged view in the virtual circle XII in FIG. It is a disassembled perspective view of the backrest seen from the front side. It is a disassembled perspective view of the backrest seen from the back side. It is a principal part expansion disassembled perspective view which shows the intermediate | middle board and the drawing tool which were seen from the front side.

Explanation of symbols

(1) Chair
(2) Leg
(3) Back frame
(3a) Base kite
(4) Backrest
(5) Board
(5a) Perimeter
(6) Cushion body
(7) Middle plate
(8) Skin material
(8a) Perimeter
(9) Upper mounting part
(10) Lower mounting part
(11) Upper shell
(11a) Perforated mesh
(12) Shell middle part
(12a) Punched mesh
(13) Shell bottom
(13a) Punched mesh
(14) Engagement protrusion
(14a) Locking claw
(15) Engagement protrusion
(15a) Locking claw
(17) Perimeter
(17a) Vertical edge
(17b) Horizontal edge
(18) Intermediate connection
(18a) Branch
(18b) Branch
(19) Engagement hole
(19a) Large hole
(19b) Small hole
(20) Engagement hole
(21) Locking hole
(22) Retractor
(22a) Main unit
(22b) Locking piece
(22c) Claw
(23) Notch
(24) Pull part
(25) Tucker needle

Claims (6)

  An intermediate plate is provided between the elastically deformable substrate having a large number of slits or holes and the cushion body disposed in front of the substrate, and the intermediate plate is substantially the basic shape of the cushion body. It has a frame-shaped peripheral edge that forms a combined outer shape, and is formed so as to be elastically deformable substantially following the elastic deformation of the substrate, and the peripheral edge of the skin material covering the cushion body from the front is attached to the peripheral edge of the intermediate plate A chair characterized by comprising a backrest configured by the above.   A part of the skin material is attached to one end, the other end is penetrated from the front surface of the cushion body to the back surface side, and a retractor is provided so that a part of the skin material is pulled in the interior of the cushion body, An intermediate connection having an engaging portion for engaging the other end portion of the retractor and having both left and right end portions respectively connected to an intermediate portion in the vertical direction of the left and right vertical edge portions of the peripheral edge portion of the intermediate plate The chair according to claim 1, wherein a portion is provided on the intermediate plate.   The right and left ends of the intermediate connecting portion of the intermediate plate are provided with bifurcated portions that are bifurcated in the vertical direction toward the outside, each free end being connected to the left and right vertical edge portions of the intermediate plate. The chair according to claim 2.   The chair according to claim 2 or 3, wherein the peripheral edge portion and the intermediate connection portion are integrally formed.   5. The substrate according to claim 1, wherein the substrate is detachably attached to the peripheral edge portion of the intermediate plate by means of engagement protrusions and engagement holes respectively provided as locking means on the substrate and the intermediate plate. The listed chair.   6. A pulling portion facing in the left-right direction is provided on the backrest in a forward view by pulling a part of the skin material inward of the cushion body by the retractor. Chairs.

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