JP2019042095A - Body support body of chair - Google Patents

Abstract

To improve the appearance and difficulty in being damaged of a skin material in a body support body of a chair having the skin material made of leather.SOLUTION: In a body support body of a chair in which a cushioning material 102 is arranged on one surface of a base plate 85, the base plate 85 has frame-like edge parts 86,88, and a body part 90 recessed into rear face sides of the edge parts 86,88 in a region surrounded with the edge parts 86,88. The cushioning material 102 is formed by laminating and disposing a main cushioning material 102a fitted into the body part 90, and sub-cushioning material 102b,102c for covering the surface of the main cushioning material 102a and the surfaces of the edge parts 86,88. The base plate 85 and the cushioning materials 102a,102b,102c are covered with a skin material comprising leather.SELECTED DRAWING: Figure 16

Description

  The present invention relates to a body support which receives pressure from a person in a chair, such as a backrest or seat, or an optional headrest, shoulder rest, or elbow rest. The body support can also be called a body pressure receiving member.

  For example, in a backrest of a chair, as a method of giving a cushioning property, it is possible to roughly form a cushion type in which a cushioning material is disposed on the front of a backboard (backback inner shell) It is adopted to form a mesh type in which a mesh material is stretched.

  As a structure using the cushioning material of the former, Patent Document 1 discloses a back plate (back inner shell) and a large area on the back plate by providing a bank-like wall on the left and right side portions and the lower end portion of the peripheral edge. The present invention discloses a configuration in which the cushion material is disposed in the recess by forming the recess. Therefore, in Patent Document 1, the back plate has a roughly shallow tray shape.

Patent No. 4061160

  In Patent Document 1, the cushion material has a complicated shape having a convex portion fitted to the concave portion of the back plate, and there is a problem that the manufacturing cost is increased.

  On the other hand, there are cases where, in the chairs, the back surface of the backrest is made of cloth such as cloth and the one made of leather such as vinyl leather as variations of the same type. In this case, if the back plate of the backrest is made common, the manufacturing cost can be reduced. However, when a leather skin material, which is less stretchable than cloth, is attached to the back plate, the surface material swells particularly at places covering the edge of the back plate and the back is poor when viewed from the side It has a problem that it is easy to be damaged when it comes in contact with a desk or the like because the edge is small and rounded. If the back plate is designed and manufactured with a surface material made of cloth and a surface material made of leather in order to avoid such problems, there is a problem that it is difficult to suppress the cost because the members can not be made common.

  The present invention has been made to improve such a current situation.

  The present invention is directed to a chair body support such as a backrest, seat, headrest, shoulder rest. The present invention is multifaceted, and typical examples thereof are specified in the claims.

  The body support of the present invention is a backrest or other body support on which a cushioning material is disposed on one surface of a substrate, the substrate having a frame-like edge and an area surrounded by the edge The cushioning material includes a main cushioning material fitted in the main body, a surface of the main cushioning material, and a surface of the edge. The auxiliary cushioning material to be covered is laminated and configured, and the substrate and the cushioning material are covered with a skin material made of leather.

  In the present invention, leather includes natural leather, synthetic leather such as vinyl leather, artificial leather and the like. Moreover, the frame-like edge does not have to be a complete loop structure, and may have at least two substantially parallel portions (in the case of a backrest, left and right edges).

  Further, in the present invention, the skin material may have an auxiliary cushion material laminated on the back surface of the leather.

  In the present invention, another skin material different from the skin material can be attached to the substrate, and the other skin material is formed of a cloth having a higher elasticity than the leather, and the substrate In the state in which the main cushion material or the other main cushion material is disposed in the main body portion, the other skin material may be replaceable to the substrate without arranging the sub cushion material. Here, the cloth includes woven fabric, knitted fabric, non-woven fabric and the like.

  The present invention is configured such that a peripheral frame opened at the front and back is attached to the edge of the substrate, and the edge is the peripheral frame at the edge of the substrate and the peripheral frame. The body is formed with an engaging portion for holding the edge unremovably by overlapping and moving downward from the surface side, and another body pressure receiving member different from the substrate is attached to the circumferential frame. By forming the same engaging portion as that formed on the edge of the substrate in the other body receiving member, the substrate and the other body receiving member can be formed in the peripheral frame. It may be possible to replace it.

  Here, the circumferential frame does not have to be a complete loop structure, and comprises at least two substantially parallel portions (in the case of a backrest, left and right side frames) for attaching a body pressure receiving plate. I wish I had it.

  Moreover, as said other body pressure receiving member, what stretched flexible members, such as a mesh material, in the holding frame opened at front and back, for example is mentioned. Alternatively, as disclosed in, for example, Japanese Patent Application Laid-Open No. 2011-92539, it is also possible to adopt a support plate such as a back plate which is made flexible by forming slits such as horizontally long in multiple stages.

  And since the above-mentioned substrate is also common as a body pressure receiving member, the above-mentioned mode of the present invention which can replace the above-mentioned substrate and other body receiving members in a peripheral frame common in a plurality of types of body pressure receiving parts. Although it is characterized in that it can be selectively replaced with the peripheral frame, this feature may be an independent invention as such. In this case, it is preferable that the edge of each body receiving portion and the peripheral frame be in a closely meshing relationship, but the fixing means is not limited to the engaging portion, and for example, a screw can be adopted.

Another aspect of the present invention is a backrest or other body support in which a cushioning material is disposed on one surface of a substrate, wherein the cushioning material is configured by laminating and arranging a plurality of cushioning materials, and the substrate And the cushion material are covered with a skin material made of leather, and another skin material different from the skin material can be attached to the substrate, and the other skin material is different in material from the leather It is possible to replace the other skin material with the substrate in a state where one or more cushion materials different in number from the plurality of cushion materials are disposed on the one surface of the substrate. . Here, the material of the other surface covering material is, for example, a cloth such as a woven fabric, a knitted fabric, or a non-woven fabric.

  According to the body support of the present invention, the secondary cushion material is disposed between the surface of the edge of the substrate and the skin material, so that the skin material may be made of low stretch leather, even if the skin material is made of leather with low elasticity. The part can be rounded, and the poor appearance of the body support when viewed from the side can be eliminated to improve the aesthetic appearance, and the damage to the surface material when the surface of the surface material contacts a desk or the like is reduced. it can. Further, even when the user's body hits the edge of the body support, the touch can be softened by the auxiliary cushioning material, so that the feeling of use such as back pain can be improved. Further, since the main cushion material and the auxiliary cushion material are laminated and configured, even if a cushion material having a complicated uneven shape is not formed as in Patent Document 1, for example, a flat cushion material is punched out Since the main cushion material and the secondary cushion material can be formed by processing, an increase in manufacturing cost can be suppressed.

  Further, in the present invention, if the surface covering material has the auxiliary cushioning material laminated on the back surface of the leather, the appearance of the body support can be further enhanced by making the surface of the surface covering material more rounded. While improving, damage to the edge of the skin can be further reduced.

  Further, in the present invention, the substrate can be replaced with another skin material made of a cloth having stretchability higher than that of the leather, instead of arranging the sub-cushion material and replacing it with the skin material made of leather. By commonizing, it is possible to easily realize the change between the cloth specification and the leather specification while suppressing the increase in the manufacturing cost. For this reason, when arranging a plurality of types of body supports, while being able to control the effort of design, members can be made common and it can contribute also to cost reduction. Further, if the main cushion material is made common between the cloth specification and the leather specification, further cost reduction can be realized.

  In the present invention, the peripheral frame opened at the front and back is attached to the edge of the substrate, and the edge is overlapped with the peripheral frame from the surface side of the peripheral frame on the edge of the substrate and the peripheral frame. By forming the engaging portion that holds the edge in an unremovable manner by moving it downward, the substrate can be easily attached to the peripheral frame without the need for screwing. . For this reason, assembly is easy.

  Furthermore, another body pressure receiving member different from the substrate can be attached to the peripheral frame, and the other body receiving member can be formed with the same engaging portion as that formed on the edge of the substrate. Therefore, if it is possible to replace the substrate and the other body receiving member on the peripheral frame, a plurality of types of body pressure receiving members can be replaced on the common peripheral frame, so a body support such as a backrest can be It can be easily realized to change the specifications such as cushion type or mesh type. For this reason, when arranging a plurality of types of body supports, while being able to control the effort of design, members can be made common and it can contribute also to cost reduction. Furthermore, since the peripheral frame can be exposed behind for each type, it is also beneficial in terms of design uniformity and aspect.

  In the body support according to another aspect of the present invention, the substrate and the plurality of cushioning materials are covered with a skin material made of leather, and another skin material different from the skin material can be attached to the substrate. Since the other skin material can be replaced with the substrate in a state where one or more cushion materials different in number from the plurality of cushion materials are disposed on one surface of the substrate, the substrate should be made common. It is possible to easily change the specification of the skin material while suppressing the increase in the manufacturing cost. For this reason, when arranging a plurality of types of body supports, while being able to control the effort of design, members can be made common and it can contribute also to cost reduction.

It is the perspective view which looked at the chair made into mesh type from the front, (A) is what displayed a flexible sheet and (B) omits a flexible sheet. It is the perspective view which looked at the chair which concerns on embodiment from the back, (A) is what displayed a flexible sheet | seat, (B) abbreviate | omits a flexible sheet | seat. It is a separation perspective view of a back frame and a sheet holding frame. It is a separation perspective view of a back frame and a sheet holding frame. (A) is a separation perspective view of a back pillar and a back frame, (B) is a perspective view which shows the attachment procedure of a sheet | seat holding frame. It is a separation perspective view of a back frame and a sheet holding frame. (A) is AA sectional drawing of FIG. 1 (B), (B) is the elements on larger scale of (A), (C) is CC sectional drawing of FIG. 1 (B). It is a longitudinal side view of the central part of the back. It is a figure which shows the state made into a cushion type, (A) is a perspective view which shows most parts of an external appearance, (B) is a perspective view in the state which abbreviate | omitted the cushion, (C) is a separation perspective view. It is the perspective view which looked at the backrest from the back, (A) is what displayed the back frame, (B) is what abbreviate | omitted the back frame. It is a separation perspective view of a back board and a back frame. (A) is a central longitudinal section showing the relationship between the back plate and the upper shell, and (B) is an exploded perspective view of the back plate and the upper shell. It is a plane sectional view in the XIII-XIII view point of FIG. 12 (B). (A) is a longitudinal side view of the upper part of a center part, (B) is a vertical side view of a lower part of a central part. It is a figure of the backrest of embodiment which has a skin material made from leather, (A) is a vertical side view, (B) is the elements on larger scale of a drawing-in part periphery. It is an exploded perspective view of a back board and a cushion material. FIG. 16 is a front cross-sectional view at a point of view of XVII-XVII in FIG. 15; (A) is a front view and a back view of a skin material, (B) is a DD sectional view of (A), (C) is an EE sectional view of (A). It is a figure for demonstrating the example of a manufacturing process of a skin material. FIG. 20 is a schematic cross-sectional view corresponding to each process of FIG. 19;

  Next, an embodiment of the present invention will be described based on the drawings. In the present application, left, right, front and back words are used to specify the direction, but this is based on the person who normally sits in a chair. The front view is the direction opposite to the person sitting. The direction is clearly shown in FIG. 1 just in case.

  The present embodiment is applied to a rotating chair that is frequently used in the office. Moreover, the chair of this embodiment is a type in which the front part of the backrest advances when a person sits down. In the present embodiment, the present invention is applied to the backrest. 1 to 8 show a state in which the backrest is a mesh type, and FIG. 9 and the subsequent figures show a state in which the backrest is a cushion type.

(1). Outline of Chair First, an outline of the chair will be described with reference to FIGS. As shown in FIG. 1, the chair is provided with a leg device 1, a seat 2 and a backrest 3 as main elements. The leg 1 has a leg support 4 composed of a gas cylinder and radially extending branches 5, and a caster is provided at the tip of each branch 5. A substantially box-like base (not shown) opened upward is fixed to the upper end of the leg support 4.

  Although not shown, a resin or aluminum die-cast front block is fixed by bolts to the front end of the base, and a pair of left and right front links are rotatably mounted on the front block. . The front link is slightly inclined backward with respect to the vertical line in a side view in a neutral state in which a person is not seated, and is inclined when a person is seated.

  Further, a tilting body (not shown) is connected to the base so as to be able to tilt backward by a left and right long support shaft, and a rear block 14 is fixed to a rear portion of the tilting body. A back support 16 is fixed to the rear of the rear block 14, and the upper end of the backrest 3 is attached to the upper end of the back support 16. The back support 16 has two left and right vertical frames 26, and the upper ends of the left and right vertical frames 26 are integrally connected via a connecting part 27.

  As shown in FIG. 2, the lower end portion of the backrest 4 is connected to the upper end portion of the second interlocking link 36 that can tilt forward and backward. A pair of left and right rear links (not shown) are connected to the rear block 14 in parallel with the front link, and the seat 2 is connected to the front link and the rear link via a seat outer shell When a person is seated, the seat front link and the rear link are inclined backward to lower the seat, and the second interlocking link is connected via the first interlocking link (not shown) interlocked with the rotation of the rear link 36 tilts forward.

  Therefore, when a person is seated, the lower end advances by bending the backrest 3 around its upper end. Thereby, even if a person sits down and sits down, the back of the person is supported by the backrest 3. When a person sits down deeply, the backrest 3 does not move and the downward movement of the seat 2 is allowed by the deformation of the first interlocking link described above. The support structure of the seat 2, the advancing mechanism of the backrest 3, the locking mechanism and the like are not directly related to the present invention, and thus the detailed description will be omitted.

(2) Outline of Mesh Type Back Next, the backrest 3 will be described with reference to FIG. For example, as shown in FIG. 1, the backrest 3 has a back frame 41 opened in the front and back, upper and lower sheet holding frames 46 and 47 overlapped on the front of the back frame 41, and a flexible sheet receiving body pressure of a seated person And 48. The flexible sheet 48 is a mesh-like fabric such as a knitted fabric or a woven fabric, and is woven (woven) with a strong elastic yarn so as to exert a strong elastic force in the lateral direction. For example, as can be seen from FIG. 3, the abutting surfaces of the upper and lower sheet holding frames 46 and 47 are inclined with respect to the horizontal plane. To be precise, the abutment surfaces of the two are inclined so that the left and right outer side is low and the inner side is high in front view.

  As partially shown in FIG. 7, a belt-like edge member 49 made of resin tape or the like is fixed by sewing or the like around the flexible sheet 48. The edge member 49 is a sheet holding frame 46, It is attached (locked) to the back of 47. Since the flexible sheet 48 is wound from the front to the back of the sheet holding frames 46 and 47, the sheet holding frames 46 and 47 are entirely hidden by the flexible sheet 48, but it is possible that they can be seen through. .

  The sheet holding frames 46 and 47 are divided into an upper sheet holding frame 46 and a lower sheet holding frame 47, but the number of flexible sheets 48 is one. The ratio of the vertical heights of the upper sheet holding frame 46 and the lower sheet holding frame 47 can be set arbitrarily.

  The back frame 41 is composed of left and right side frames 50 long in the vertical direction, an upper frame 51 connected to the upper ends of the left and right side frames 50, and a lower frame 42 connected between the lower ends of the left and right side frames 50. As a whole, it has a substantially square shape in front view. On the other hand, the upper frame 51 is entirely located behind the side frame 50, and in a side view, is configured to be folded back and downward.

  On the other hand, the upper sheet holding frame 46 has a side member 52 overlapping the side frame 50 of the back frame 41 from the front, and an upper shell 53 integrally connected to the upper ends of the left and right side frames 50. The upper shell 53 has a horizontally elongated mounting portion 53a extending between the upper ends of the left and right side members 52, and a curled portion 53b bent rearward and downward from the horizontally elongated mounting portion 53a. It is fixed to the upper frame 51. Upper shell 53 may be paraphrased as a shell-like upper member.

  Most of the lower sheet holding frame 47 is composed of a horizontal portion 47a overlapping the lower frame 42 of the back frame 41, and overlaps the lower portion of the side frame 50 of the back frame 41 at the left and right ends of the horizontal portion 47a. The standing portion 47b is integrally provided.

  In the present embodiment, the upper frame 51 of the back frame 41 and the curled portion 53 b of the upper sheet holding frame 46 are integrally formed. Therefore, the upper frame 51 of the back frame 41 is also covered from behind by the curled portion 53 b. As shown in FIG. 2, the curled portion 53 b is entirely covered with a flexible sheet 48. Further, in front of the upper frame 51 and the curled portion 53b, a space is open over the entire length of the left and right.

(3). Back frame Next, details of the backrest 3 will be described. First, the structure of the back frame 41 and the attachment structure to the back support 16 will be described. For example, as can be understood from FIG. 7, the side frame 50 and the lower frame 42 that constitute the back frame 41 have a cross-sectional V-shape that opens forward. Therefore, it is not easily deformed by the body pressure of the seated person. The side frame 50 is curved in a side view so that the lower part thereof is at the front. Accordingly, the flexible sheet 48 is provided with a lumbar support portion. On the other hand, the lower frame 42 is gently bent in a forward concave shape in plan view.

  As can be understood from FIG. 7, the side frame 50 is basically V-shaped with a forward opening, but the upper end is in the form of a U-shaped shallow groove. On the other hand, left and right end portions of the upper frame 51 that are continuous with the side frame 50 are flat plate-like hinge portions 54 that are bent in a U-shape in a side view. The lower end of the backrest 3 is advanced by sitting by the hinge portion 54 being deformed and the posture of the backrest 3 being changed.

  A connecting portion 27 of the back support 16 is curved upward and convex in a rear view, and a dome portion 55 opened downward so as to be fitted from above onto the connecting portion 27 of the back support 16 at the left and right middle portions of the upper frame 51. Form. For example, as shown in FIG. 2, the downward opening groove 55 'corresponding to the connecting portion 27 of the back support 16 is also formed in the curled portion 53b.

  Further, the left and right portions of the upper frame 51 sandwiching the dome portion 55 are inclined so as to be higher toward the left and right outside (lowered toward the dome portion 55), so that the upper frame 51 is entirely As viewed from the rear, in the back view, it has a shape of a convexly curved nabe. Corresponding to this, the curled portion 53b also has a nabe shape that is curved downward and convex in a rear view.

  As shown in FIG. 5 (A), the upper and lower ends of the left and right spines 16 are integrally formed with branch ridges 56 projecting outward to the left and right, and on the left and right sides of the dome portion 55 of the upper frame 51. Form a groove 57 in which the branch hook 56 fits. As described above, by fitting the upper frame 51 into the branch 56, the support strength is increased and the anti-twist function is strengthened.

  The upper frame 51 and the branch hook 56 are fastened to each other by screws inserted from below. The upper frame 51 is provided with a nut to which a screw is screwed. The screw penetration hole 58 of the branch rod 56 is visible in FIG. 5 (A). As can be understood from FIG. 1 (B), the left and right vertical frames 26 constituting the support 16 are in the form of grooves having a flat cross section V-shape opened forward.

(4) Connection Structure of Back Frame and Sheet Holding Frame In the present embodiment, the sheet holding frames 46 and 47 are attached to the back frame 41 first after the upper sheet holding frame 46 is attached to the back frame 41. Next, as shown in FIG. 5 (B), the lower sheet holding frame 47 is attached in the procedure of overlapping the back frame 41. Therefore, fitting the curled portion 53b of the upper sheet holding frame 46 to the upper frame 51 of the back frame 41 and fitting the side members 52 of the upper sheet holding frame 46 to the side frame 50 of the back frame 41 , Done in a series. A flexible sheet 48 is attached to the sheet holding frames 46 and 47 in advance by a method described later.

  For example, as shown in FIG. 6, as a fitting means for the curled portion 53b and the upper frame 51, the first engagement hole 60 and the second engagement are sequentially formed on the upper frame 51 from the left and right middle to the outer side. The mating hole 61 and the third engaging hole 62 are formed to open upward in a pair of left and right, while the front surface of the curled portion 53 b is provided with a second corresponding to the respective engaging holes 60, 61, 62. The first to third engagement protrusions 63 to 65 are provided. The engagement holes 60 to 62 and the engagement protrusions 63 to 65 constitute an engagement portion described in the claims.

  In this case, although the first engagement hole 60 is a simple shape open at the back and the top, the second engagement hole 61 is in the form of a rearward opening having a top inner surface, and the third engagement hole 62 is It has a bag-like shape that opens downward as well. On the other hand, the second engagement protrusion 64 has a T-shaped claw shape in a side view, and is fitted into the second engagement hole 61 by deformation against elasticity.

  Then, the upper end of the second engagement protrusion 64 abuts on the upper inner surface of the second engagement hole 61, and the upper shell 53 (curled portion 53b) is held so as not to be able to move upward. The front surface of the upper portion of the second engagement projection 64 is inclined in a side view so that the insertion into the second engagement hole 61 against elasticity is smooth (the elastic deformation causes the claws of the upper end to Department moves back and forth.). The second engagement protrusion 64 is fitted in the second engagement hole 61 so as not to be displaced in the front-rear direction and the left-right direction. Therefore, the second engagement protrusion 64 and the second engagement hole 61 have the positioning of the upper shell 53 in the front-rear direction and the upward drop prevention function.

  The third engagement projection 65 has a claw shape in a side view L-shape, and when the third engagement projection 65 is fitted into the third engagement hole 62, the upper shell 53 (the curled portion 53b) is shifted in the back and forth direction It is kept disabled. A hanger and a bed rest can be attached to the upper frame 51, but the description of this point is omitted.

  In FIGS. 3 and 4, the back frame 41 is displayed in a state viewed from the front, and the sheet holding frames 46 and 47 are displayed in a state viewed from behind (in a state of being inverted by about 180 °). As can be understood from these FIGS. 3 and 4, while the pair of the vertically long first positioning projection 67 and the downward hook 68 is vertically provided on the side member 52 of the first sheet holding frame 46 in a backward direction, In the side frame 50 of the back frame 41, a pair of left and right first touch stop pieces 69 sandwiching the positioning projection 67 from the left and right, and a plane view type first hook catch 70 with the downward hook 68 fitted from above are vertically It is formed in steps.

  As means for attaching the lower sheet holding frame 47 to the back frame 41, first, an upward claw 71 is protruded from the upper end of the rising portion 47b of the lower sheet holding frame 47, and the second positioning projection 72 is formed below it. The horizontal claws 73 are provided at the left and right ends of the horizontal portion 47a, while the second claw catch 74 in which the upward claw 71 is fitted from below and the second positioning projection 72 are inserted from the front on the side frame 50 of the back frame 41. The lower frame 42 is provided with a side-viewing third claw catch 76 which engages with the lateral claw 73.

  The positioning projection 67, the downward claw 68, the first touch stopper 69, the first claw catch 70, the upward claw 71, the second positioning projection 72, and the lateral claw 73 respectively form part of the engaging portion described in the claims. ing.

(5). Connection procedure, etc. When assembling the backrest 3, first, move the upper sheet holding frame 46 downward from above to attach the curled portion 53b to the upper frame 51 and at the same time as the side members 52 is fitted into the side frame 50 and mounted. At this time, since the upper portion of the back frame 41 is sandwiched from the front and back by the side members 52 of the upper sheet holding frame 46 and the curled portion 53 b, the upper sheet holding frame 46 It can be worn smoothly.

  Further, when describing the relationship between the side member 52 and the side frame 50, the downward movement of the side member 52 causes the first positioning projection 67 to be fitted between the first touch stop pieces 69, and the downward hook 68 to be the first. Into the nail catch 70 from above. As a result, the side members 52 are held indisplaceably in the left-right direction and in the front-rear direction.

  Then, with the upper sheet holding frame 46 attached to the spine frame 41, as shown in FIG. 5B, first, the upward hook 71 of the lower sheet holding frame 47 and the second hook catch 74 of the side frame 50. When the lower sheet holding frame 47 is pressed against the back frame 41 with the left and right second claw catches 74 as a fulcrum, the second positioning projection 72 is fitted between the second touch stop pieces 69. As it gets stuck, the transverse claw 73 engages with the third claw catch 76 by deforming against its elasticity.

  Since the upper and lower sheet holding frames 46 and 47 are attached to one flexible sheet 48, when the lower sheet holding frame 47 is attached to the spine frame 41, the upper and lower sheet holding frames 46 and 47 have flexibility. The sheets 48 are drawn closer together. For this reason, the upper and lower sheet holding frames 46 and 47 are held so as not to move vertically. As shown in FIG. 2, the lower sheet holding frame 47 is fixed to the lower frame 42 of the back frame 41 by screws (not shown). The said screw is located in the left-right middle part, and is hidden by the upper end part of the 2nd interlocking link 36. As shown in FIG. Therefore, the lower sheet holding frame 47 can be fixed to the lower frame 42 without deteriorating the appearance.

  As shown in FIG. 8, a nut holding groove 78 opened upward is provided in the left and right middle portion (upper end portion of the dome portion 55) of the upper frame 51, and a nut (not shown) is provided on the nut holding groove 78 ) Can be fitted. A screw hole 79 communicating with the nut holding groove 78 is open at the upper end of the back support 16. A hanger (not shown) can be attached by screwing a screw from below onto the nut.

  In FIG. 7, the mounting relationship between the side member 52 and the side frame 50 is displayed. The edge member 49 is hooked to a boss 80 provided on the sheet holding frames 46 and 47. Therefore, holes 81 in which the bosses 80 are fitted are jumped in the edge member 49. The bosses 80 also project from the front of the outer peripheral edge of the curled portion 53b. In the edge member 49, a large number of cut-out holes are formed in a jump to avoid interference between the claws 68, 71, 73 and the positioning projections 67, 72.

  For example, as shown in FIG. 6, in the curled portion 53b of the upper sheet holding frame 46, a group of vertically elongated slits 82 is formed side by side for weight reduction and the like. Further, between the left and right ends of the horizontal mounting portion 53a and the side members 52, notches 83 opened forward are formed.

(6). Cushion type specification 1
The cushion type shown in FIGS. 9-14 uses a back plate 85 as an example of a body support substrate. When the back plate 85 is used, the upper shell 53 is different in form from the mesh type. The parts common to the mesh type and the cushion type are denoted by the same reference numerals in the drawings, and the description will be omitted unless necessary.

  A side member (side edge) 86 overlapping the side frame 50 of the back frame 41 is provided on the left and right sides of the back plate 85, and an upper member (upper edge) to which the upper shell 53 is attached at the upper end of the back plate 85 A lower member (lower edge) 88 is provided at the lower end of the back plate 85 so as to overlap with the lower frame 42 of the back frame 41 from the front side.

  The portion of the back plate 85 surrounded by the side members 86 and the lower members 88 forms a main body portion 90 which has entered the space enclosed by the back frame 41 (indented on the back side of the members 86, 88) There is. Therefore, the main body 90 is stepped backward from the side member 86 and the lower member 88, and the stepped portion is a wall indicated by reference numeral 90a. Thus, the back plate 85 has a generally shallow tray-like appearance. The main body 90 has a depth approximately half that of the front-rear thickness dimension of the side frame 50. Therefore, the main body 90 is surrounded by the back frame 41 and entirely accommodated in the space, and does not protrude behind.

  The cushion member 91 is fitted in the main body 90. As shown in FIGS. 13 and 14, the cushioning material 91 is composed of a main cushioning material 91a fitted in the main body 90 and a thin auxiliary cushioning material 91b overlapping the surface, and the auxiliary cushioning material 91b is covered It is covered with a material 92. The auxiliary cushion material 91 b overlaps the side member 86, the lower member 88, and the upper shell 53, and is covered with the surface material 92 (see FIG. 9A). The surface material 92 is formed of a cloth. The auxiliary cushion material 91 b is made of a thin urethane sheet having a thickness of about 2 to 3 mm, and is laminated on the back surface of the skin material 92.

  The surface material 92 is formed in a bag shape, and the back plate 85 and the upper shell 53 are completely covered with the surface material 92 in the form of a bag. Although not shown in the drawings, an edge member made of a resin sheet is attached by sewing or the like to the back surface of the upper end portion and the lower end portion of the main cushion material 91a, and this edge member is shown in FIG. (C) The upper and lower hooks 98 shown in FIG. 10 are fitted and locked. Therefore, the main cushion material 91a is firmly positioned.

  Since the auxiliary cushioning material 91b intervenes on the back side of the skin material 92, the contact is alleviated even if the body of the seat occupant hits the front of the side member 86 and the lower member 88. The side member 86 is also cushioned when it hits the top of a desk or the like, which also prevents the surface material 92 from being broken. Further, in a state where the surface material 92 is mounted, the hardness of the front surface of the cushion material 91 mounted to the concave main body portion 90 and the front surface of the side member 86 and the lower member 88 where the main cushion material 91a is not overlapped It makes it difficult to feel extreme discomfort due to the difference in

  Although the upper shell 53 is provided also in the present embodiment, since the back plate 85 is provided in the present embodiment, the upper shell 53 is not provided with the horizontal mounting portion 53a of the first embodiment (it is not necessary in the first place). Has the same form as the curled portion 53b of the first embodiment. The relationship (attachment structure) with the upper frame 51 is the same as that of the first embodiment, so the description will be omitted.

  For example, as clearly shown in FIG. 12A, the upper member 87 described above is provided at the upper end of the back plate 85. The upper member 87 is in the form of a horizontal plate projecting backward. And while providing the front side engagement piece 94 in the left-right both ends of the upper shell 53, by making the back plate 85 the upper end of the side member 86 a little higher than the upper member 87, the side engagement piece 94 is carried out. The side fitting part 95 which can fit is formed.

  Furthermore, while the center engagement piece 96 is provided to project forward at the left and right middle portions of the upper shell 53, the left and right pair of center fitting ribs 97 in which the center engagement piece 96 is inserted into the upper member 87 of the back plate 85. The front end of the upper shell 53 is in contact with the rear end of the center fitting rib 97. Accordingly, as clearly shown in FIG. 14, the front end of the upper shell 53 is stepped down from the lower surface of the upper member 87. However, since the degree of the step-down is slight, the upper member 87 and the upper shell 53 are smoothly continuous. The center fitting rib 97 is L-shaped, so that the upper shell 53 is held so as not to be vertically displaced.

  The engagement between the engagement pieces 94 and 96, the fitting portion 95, and the fitting rib 97 regulates the upper shell 53 with respect to the upper member 87 in the left-right position, the front-rear position, and the upper-lower position. As described above, as shown in FIG. 12A, the upper member 87 is stepped down from the upper end of the side member 86. Therefore, the main cushion member 91a can be held on the upper surface of the upper member 87 in a non-slip manner. .

  In the upper shell 53, there are punched holes for forming the projections, so as described above, the auxiliary cushion material 91b (here, a urethane sheet) is attached to the back surface (inner surface) in a bag shape. Covering with the skin material 92 is preferable because deterioration of the appearance can be prevented. The surface material 92 is fixed to the upper shell 53 by, for example, a tucker (it may be adhered or the like). Also in the present embodiment, although the upper shell 53 is provided with the first to third engagement protrusions 63 to 65 shown in FIG. The third engagement protrusions 63 to 65 are exposed from holes formed in the surface material 92.

  For example, as shown in FIG. 12B, in the upper part of the back plate 85, in order to prevent the surface material 92 from floating, a laterally long drawing slit 89 is formed. A recess 89a is formed on the back side of the lead-in slit 89, the skin material 92 is fixed by sewing or the like, and the stopper plate 89b is fitted in the recess 89a. The stopper plate 89b is inserted into the drawing slit 89 from the front side, and in a state where the cushioning material 91 is crushed and the skin material 92 is pulled strongly, the stopper plate 89b is pulled through to the back side, and then the skin material 92 is fronted The stopper plate 89b is inserted into the recess 89a in a predetermined posture.

  If the pull-in stopper is hook-like, there is a risk that it may come off with some bounce, but in the present embodiment, the stopper plate 89b has a large area overlapping with the main body part 90 from behind, And hold. In addition, since it is fitted in the recess 89a, no step occurs and the appearance is good (when covered with the surface material 92, the presence of the stopper plate 89b is not known at all).

  As shown in FIG. 9, in the lower portion (lumbar support portion) of the back plate 85, in order to facilitate bending deformation due to body pressure, a group of horizontally long slits 93 is formed in multiple stages. As clearly shown in FIG. 13, in the left and right end portions of the strip portion divided by the upper and lower slits 93, buffer portions 93 a having a mountain shape in plan view projecting forward are formed. For this reason, the bending deformation of the area provided with the group of the slits 93 is further facilitated.

  As partially shown in FIG. 12B, the left and right lower end portions of the main cushion member 91a are formed with notches 91c opened outward in the left and right direction in order to avoid interference with the buffer portion 93a.

  The attachment structure of the back plate 85 to the back frame 41 is basically the same as that of the first embodiment. That is, the back plate 85 is provided with a first positioning projection 67, a downward claw 68, a second positioning projection 72, and a lateral claw 73. However, in the present embodiment, since the upward claw 71 of the first embodiment is not necessary, this is not provided. In the present embodiment, the back plate 85 is attached to the back frame 41 in the procedure of being shifted downward and then pressing the lower member 88 against the lower frame 42 of the back frame 41. Since the surface material 92 is formed like a bag, the first positioning projection 67, the downward claw 68, the second positioning projection 72, and the lateral surface claw 73 are exposed from the hole provided in the skin 92.

  In the present embodiment, the upper shell 53 is connected to the back plate 85 via the skin material 92, but since the skin material 92 is somewhat extended, the attachment of the back plate 85 and the attachment of the upper shell 53 can be performed separately. Since the upper member 87 of the back plate 85 overlaps the upper shell 53, it may be reasonable to attach the back plate 85 to the side frame 50 after the upper shell 53 is attached to the upper frame 41 first. As shown in FIG. 14B, the back plate 85 is fixed to the lower frame 42 of the back frame 41 with a screw 77.

  Although not described purposely, it is not necessary to form the surface material 92 in a bag shape. An auxiliary cushioning material is not always necessary, and it is also possible to use a plurality of auxiliary cushioning materials. The upper shell need not be provided, and if provided, it can be fixed to the back plate by welding or integrally formed.

  In the present embodiment, since the main cushion material 91a is accommodated inside the thickness of the back frame 41 (an example of the peripheral frame) in the front-rear direction, the backrest 3 can be made thin and compact as a whole. That is, since the main cushion material 91a can be disposed by effectively utilizing the dead space enclosed by the back frame 41, the cushioning property is higher than in the case where a thick cushion material is stretched on the front of the substantially flat back plate. Can be made thinner by making the thickness of the backrest 3 thinner.

   Moreover, when the back plate 85 is damaged for some reason, only the back plate 85 can be replaced. This is economical. The back plate 85 is in the form of a tray and has high rigidity. However, since the back plate 41 and the back frame 41 reinforce each other, the back plate 3 can also contribute to the improvement of the strength of the backrest 3 as a whole.

  In this embodiment, since it is possible to replace a plurality of types of body pressure receiving members (the sheet holding portions 46 and 47 or the back plate 85) on the common back frame 41, the backrest 3 is a cushion type or a mesh type. Can easily be realized. For this reason, when arranging the backrest 3 of several types, while being able to suppress the effort of design, it can contribute also to a cost reduction by sharing members. Furthermore, since the back frame 41 can be exposed behind in each type, it is also beneficial in terms of design uniformity and aspect.

(7). Cushion type specification 2
Next, the leather surface material type will be described with reference also to FIGS. The embodiment of the leather-made skin material type uses vinyl leather as an example of the skin material 101 made of leather, and is replaced with the skin material 92 and the cushion material 91 of the cushion type specification 1, and the skin material 101 and the cushion material 102 is provided. The parts common to the cushion type specifications 1 and 2 are denoted by the same reference numerals in the drawings, and the description will be omitted unless necessary.

  As shown in FIG. 15 to FIG. 17, the cushion material 102 is fitted in the main body portion 90 of the back plate 85. The cushioning material 102 is composed of a main cushioning material (main cushioning material) 102a fitted in the main body 90, and two thin additional cushioning materials (sub cushioning materials) 102b and 102c overlapping the surface thereof. The back plate 85 and the cushioning material 102 are covered with the skin material 101. The additional cushioning material 102 b covers the entire front surface of the main cushioning material 102 a and overlaps the side member 86 and the lower member 88. The additional cushioning material 102c covers the entire front surface of the additional cushioning material 102b. That is, the additional cushion materials 102b and 102c are disposed overlapping each other so as to overlap the side member 86, the lower member 88, and the main cushion material 102a.

  Further, although the display in the drawing is omitted, an edge member made of a resin sheet is attached by sewing or the like to the back surface of the upper end portion and the lower end portion of the main cushion material 102a. The hooks 98 are fitted and locked, and the additional cushioning members 102b and 102c are fixed to the main cushioning member 102a by sewing (or bonding or the like). Thus, the cushioning material 102 is firmly positioned.

  As shown in FIGS. 15, 17 and 18, the skin material 101 is formed in a bag shape, and the back plate 85, the upper shell 53, and the cushion material 102 are completely covered with the bag-like skin material 101. The surface material 101 is composed of a surface covering material 101a and a backing material 101b, and includes a bag-like portion 105 in which a portion covering the upper part of the upper shell 53 and the back plate 85 is sewn with a sewing thread 104. The surface covering material 101a is composed of a leather material 101c and an auxiliary cushion material 101d laminated on the back surface of the leather material 101c. The leather material 101c and the backing material 101b are made of leather (vinyl leather in this embodiment) having a lower elasticity than the fabric covering material 92 (see FIG. 9 and the like). The auxiliary cushion material 101d is made of, for example, a thin urethane sheet having a thickness of about 2 to 3 mm, and is laminated on the back surface of the leather material 101c by adhesion or the like.

  As shown in FIG. 18, in the surface material 101, an edge member 49 is fixed by sewing or the like to the left and right edge portions and the lower edge portion of the surface coated backing material 101a and to the lower edge portion of the backing surface backing material 101b. . The edge member 49 is hooked to a boss 80 (see FIG. 11) projecting from the back of the side member 86 of the back plate 85 and the lower member 88. At the left and right edge portions of the backing base material 101b, a pair of mounting portions 106 which are hooked to the boss 80 are provided at each of the left and right edge portions. When attaching the skin material 101 to the back plate 85, the bag-like portion 105 is put on the upper portion of the upper shell 53 and the back plate 85, and the edge member 49 and the attachment portion 106 are hooked on the boss 80 on the back surface of the members 86 and 88. Be done. The edge member 49 is attached to the boss 80 so as to wind the tension material 101 a, 101 b around the peripheral edge of the members 86, 88. In addition, after the attachment portion 106 of the backing material 101b is attached to the boss 80 of the side member 86, the edge member 49 of the surface material 101a is attached.

  As shown in FIGS. 17 and 18, a tensioning opening 113 through which first to third engagement projections 63, 64 and 65 (see also FIG. 9) are inserted through the backing base material 101b of the bag-like portion 105. , 114, 115 and a shell opening that exposes shell side engagement holes 66a (see also FIGS. 6 and 9) engaged with the frame side projections 66b (see FIG. 6) provided on the left and right ends of the upper frame 51 The part 116 is provided. Since the covering material 101b is provided with the tension base openings 113 to 116, after the skin material 101 is attached to the upper shell 53 and the back plate 85, the engagement projections 63, 64, 65 and the engagement holes 66a are provided. The exposure is configured.

  As shown in FIGS. 15 and 16, in the upper portions of the cushioning materials 102a, 102b and 102c, drawing slits 103a and 103b and drawing openings 103c for preventing the surface tension backing material 101a from floating are formed. ing. The slits 103 a and 103 b and the opening 103 c are formed in alignment with the lead-in slit 89 of the back plate 85. The stopper plate 89b is fixed to the front base material 101a via the pull cloth 89c. The front side edge portion of the pullable cloth 89c is fixed by sewing or the like to the laterally long laterally drawn-in portion 101e provided in the surface coated base material 101a. Further, the back side edge of the pullable cloth 89c is fixed to the horizontally long stopper plate 89b by sewing or the like.

  At the time of drawing in the surface covering material 101a, the stopper plate 89b is inserted into the opening 103c, the slit 103b, the slit 103a, and the drawing slit 89 from the front side of the backrest 3 to crush the cushion material 102 to force the skin material 101 In the pulled state, the stopper plate 89b is pulled out to the back side, and then, the skin material 101 is pulled forward to fit the stopper plate 89b into the recess 89a in a predetermined posture.

  The pull-in opening 103c of the additional cushion material 102c is larger than the pull-in slits 103a, 103b of the cushion materials 102a, 102b, and makes it easy to pull the pull-in portion 101e of the surface fabric 101a to the back plate 85 side. ing. Further, by connecting the surface covering material 101a and the stopper plate 89b via the pulling cloth 89, a space is provided between the surface covering material 101a and the stopper plate 89b. As a result, it is possible to prevent the pull-in portion 101e from being drawn too much to the back plate 85 side, and it is possible to prevent the cushion materials 102a and 102b from being extremely compressed around the pull-in portion 101 e The appearance of the pull-in portion 101e of the base material 101a can be improved.

  In this embodiment, the additional cushioning members 102b and 102c are disposed between the surface of the side member 86 and lower member 88 of the back plate 85 and the surface material 101, whereby the surface material 101 is made of leather with low elasticity. Even if it is a thing, the edge of the surface material 101 can be rounded, and the poor appearance of the backrest 3 when viewed from the side can be eliminated to improve the appearance and the edge of the surface material 101 is a desk It is possible to reduce damage to the surface material 101 when in contact with an object.

  Further, even when the user's body hits the edge of the backrest 3, the additional cushioning members 102b and 102c can soften the hit, so that the feeling of use such as back feeling can be improved. Further, since the main cushion material 102a and the additional cushion materials 102b and 102c are stacked and arranged, for example, the main cushion material 102a and the additional cushion materials 102b and 102c are formed by stamping a flat cushion material. Since it can, it can control the rise in manufacturing cost.

  Furthermore, since the surface material 101 has the auxiliary cushioning material 102c laminated on the back surface of the surface covering material 101a made of leather, the edge of the surface material 101 is made more rounded to provide the backrest 3 While being able to further improve the aesthetics, damage to the edge of the surface material 101 can be further reduced.

  Further, in the embodiment of the cushion type specification 2, since the additional cushion materials 102b and 102c are additionally arranged to the embodiment of the cushion type specification 1 and the leather is used as the skin material 101, the back plate By commonizing 85, the change between the cloth specification and the leather specification can be easily realized while suppressing the increase in the manufacturing cost. For this reason, when arranging a plurality of types of chairs, it is possible to suppress the effort of design and to contribute to cost reduction by sharing members. Further, if the main cushion materials 91a and 102a are made common to the cushion type specifications 1 and 2, further cost reduction can be realized.

  Next, with reference to FIGS. 18 to 20, an example of a method of manufacturing the bag-like portion 105 of the skin material 101 will be described. As shown in FIGS. 19 (1) and 20 (1), in the covering material 101a and 101b before sewing, the portion to be the bag-like portion 105 is the size of the surface covering material 101a and the backing material 101b. Are different. The outer edge portions 107a and 107b sewn to form the bag-like portion 105 are formed such that the outer edge portion 107a is longer than the outer edge portion 107b. The outer edges 107a and 107b are provided with alignment notches 108a and 108b.

  As shown in FIG. 19 (2) and FIG. 20 (2), the smaller backing backing material 101b (one backing backing material) is stretched to make the backing backing material outer edge portion 107b larger in size. It arrange | positions along the outer covering material outer edge part 107a of the outer covering material 101a (the other extending base material). At this time, the backing backing material 101b is stretched so that the backing backing material notch 108b is superimposed on the surface covering backing material notch 108a. For example, the outer edge portions 107a and 107b are connected to each other by stretching the backing base material 101b (the base material with the smaller size) without stretching the surface base material 101a (the base material with the larger size). Align.

  As shown in FIG. 19 (3) and FIG. 20 (3), with the backing backing material 101 b stretched, the sewing thread 104 is sewn along with the backing material outer edges 107 a and 107 b to The materials 101a and 101b are sewn together.

  As shown in FIG. 19 (4) and FIG. 20 (4), the state in which the backing base material 101b having the bag-like portion 105 is stretched is eliminated. Since the backing backing material 101b tries to return to the original size, the surface covering backing material outer edge part 107a sewn to the back covering backing material outer edge part 107b shrinks, and the surface covering backing material in the vicinity of the surface covering backing material outer edge part 107a. Gathers 109 (see FIGS. 18A and 20 (5)) are formed on the material 101a.

  Thereafter, as shown in FIG. 19 (5), the covering material 101a, 101b is turned over to form the skin material 101 having the bag-like portion 105. In this manner, after the outer edge portions 107a and 107b are sewn together in a state where the backing base material 101b is stretched to a greater extent than the surface-coated base material 101a, the above stretched state is eliminated. The gathers 109 can be easily formed on the base material 101a. Then, by turning over the base materials 101a and 101b after sewing, it is possible to form the surface material 101 having the three-dimensional bag-like portion 105 having a bulge in the surface base material 101a at the formation position of the gathers 109.

  In the surface material 101, the gathers 109 are formed corresponding to positions covering the edge of the upper portion of the side member 86 of the back plate 85 curved in a U-shape in a side view and the edge of the upper shell 53. That is, the gathers 109 are formed corresponding to positions where the edges of the back plate 85 and the upper shell 85 are curved. As a result, the occurrence of wrinkles and distortion of the surface material 101 can be suppressed where the bag-like portion 105 of the surface material 101 covers the outer edge of the back plate 85 and the upper shell 85, and the aesthetic appearance of the backrest 3 can be improved.

  In this embodiment, although both the leather material 101c of the surface covering material 101a and the backing material 101c are leather (vinyl leather), the surface covering material 101a has the auxiliary cushion material 101d on the back surface of the leather material 101c. Therefore, the stretchability is lower than that of the backing backing material 101c. That is, the stretchable base materials 101a and 101b have different stretchability. However, one stretchable base material and the other stretchable base material may have the same stretchability such as being formed of the same material and the same thickness, for example. Further, the surface material 101 is not limited to one made of leather, and may be made of cloth.

  Although the specific examples of the present invention have been described above, the present invention can be embodied variously in other ways. For example, although the embodiment is applied to the backrest, it can be applied to other body supports such as a seat. It goes without saying that when applied to the backrest, the lower part does not have to be of the type that advances by seating.

  Further, in the above-described embodiment, in the cushion type specification 2 having the skin material 101 made of leather, the two additional cushion materials 102b and 102c are provided as the secondary cushion material, but in the present invention, the secondary cushion material is 1 It may be a sheet, or may be composed of three or more.

  The present invention can be embodied in a chair. Therefore, it can be used industrially.

3 backrest (an example of body support)
41 back frame (an example of a frame)
46 Upper seat holding frame (an example of other pressure receiving member)
47 Lower seat holding frame (an example of another pressure receiving member)
85 Backboard (example of board)
86 Side member (edge)
88 Lower member (edge)
90 Body 92 Skin material (other skin material)
101 Skin material 101 d Auxiliary cushion material 102 Cushion material 102 a Main cushion material (main cushion material)
102b, 102c Additional cushioning material (sub cushioning material)

Claims (5)

A backrest or other body support on which a cushioning material is disposed on one surface of the substrate,
The substrate has a frame-like edge, and a main body indented on the back side of the edge in a region surrounded by the edge,
The cushion material is configured by laminating and arranging a main cushion material fitted in the main body, and a secondary cushion material covering the surface of the main cushion material and the surface of the edge.
The substrate and the cushion material are covered with a skin material made of leather,
Chair body support. The skin material has an auxiliary cushion material laminated on the back surface of the leather.
The body support of a chair according to claim 1. Another surface material different from the surface material can be attached to the substrate,
The other surface covering material is formed of a cloth having elasticity higher than that of the leather, and the sub cushion material is disposed in a state where the main cushion material or the other main cushion material is disposed on the main body of the substrate. The other skin material can be replaced with the substrate without
The body support of the chair according to claim 1 or 2. A peripheral frame opened on the front and back is attached to the edge of the substrate,
The edge portion of the substrate and the peripheral frame body are formed with an engaging portion that holds the edge portion in a non-releasable manner by overlapping the edge portion from the surface side of the peripheral frame and moving downward. ,
Another body pressure receiving member different from the substrate can be attached to the peripheral frame, and the other body receiving member is formed with the same engaging portion as that formed on the edge of the substrate. By doing this, the substrate and the other body receiving member can be replaced with the peripheral frame.
The body support of a chair according to any one of claims 1 to 3. A backrest or other body support on which a cushioning material is disposed on one surface of the substrate,
The cushioning material is configured by laminating and arranging a plurality of cushioning materials, and the substrate and the cushioning material are covered with a skin material made of leather,
Another surface material different from the surface material can be attached to the substrate,
The other skin material is formed of a material different from that of the leather, and one or more cushion materials different in number from the plurality of cushion materials are disposed on the one surface of the substrate The other skin material can be replaced with the substrate,
Chair body support.

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