阅读说明：本技术 座椅 (Chair ) 是由 有田优纪 碕田耕平 加藤瑞树 远地淳司 于 2020-04-30 设计创作，主要内容包括：本发明提供一种能够减轻表皮组装作业的负担且能够提高座椅的外观品质的座椅。座椅(1)具备：线状构件(4),沿着表皮(3)的牵拉部(3a)的长边方向延伸并且被设置于该牵拉部(3a)；可弹性变形的筒状构件(5),在衬垫(2)中的槽(2b)的内侧以沿着该槽(2b)延伸的方式而被设置。在筒状构件(5)的外周面形成有狭缝(5b),该狭缝在筒状构件(5)的长边方向上延伸,具有比线状构件(4)的外径窄的宽度并且基于筒状构件(5)的弹性变形而能够被扩大该宽度。(The invention provides a seat which can reduce the load of the skin assembling operation and can improve the appearance quality of the seat. A seat (1) is provided with: a linear member (4) that extends in the longitudinal direction of the pulling section (3a) of the skin (3) and is provided on the pulling section (3 a); an elastically deformable cylindrical member (5) is provided inside the groove (2b) in the pad (2) so as to extend along the groove (2 b). A slit (5b) is formed in the outer peripheral surface of the cylindrical member (5), extends in the longitudinal direction of the cylindrical member (5), has a width smaller than the outer diameter of the linear member (4), and can be expanded by elastic deformation of the cylindrical member (5).)

1. A seat, characterized by comprising:

a pad having a groove formed in an opposing surface facing the seated person;

a skin covering the facing surface of the pad, having a pulling portion extending along the groove and pulled to an interior of the groove;

a linear member extending in a longitudinal direction of the pulling portion and provided at an end edge of the pulling portion; and the number of the first and second groups,

an elastically deformable cylindrical member provided inside the groove in the gasket so as to extend along the groove; wherein the content of the first and second substances,

a slit is formed in the outer peripheral surface of the cylindrical member, the slit extending in the longitudinal direction of the cylindrical member, having a width smaller than the outer diameter of the linear member, and being capable of being expanded by elastic deformation of the cylindrical member.

2. The seat according to claim 1, wherein:

an insertion opening into which the linear member can be inserted is formed at an end of the cylindrical member.

3. The seat according to claim 2, wherein:

the inner diameter of the insertion port is set to be wider than the inner diameter of the other portion of the cylindrical member.

4. The seat according to any one of claims 1 to 3, wherein:

the cylindrical member has an outer inclined surface on the outer peripheral surface, the outer inclined surface being inclined so as to extend radially inward of the cylindrical member as approaching an edge of the slit from a circumferential direction of the cylindrical member.

5. The seat according to any one of claims 1 to 4, wherein:

the cylindrical member has an inner inclined surface on an inner circumferential surface of the cylindrical member, the inner inclined surface being inclined so as to extend radially inward of the cylindrical member as approaching an edge of the slit from a circumferential direction of the cylindrical member.

6. The seat according to any one of claims 1 to 5, wherein:

the linear member has a tapered protruding portion at a portion of an outer peripheral surface of the linear member that is spaced apart from the pulling portion.

7. The seat according to any one of claims 1 to 6, wherein:

the linear member has an engaging projection on an outer peripheral surface of the linear member, the engaging projection being engageable with an inner peripheral surface of the cylindrical member.

8. The seat according to any one of claims 1 to 7, wherein:

in the case of the structure in which the plurality of pulling portions are pulled to the plurality of grooves respectively,

further comprising: and a hook and loop fastener for detachably holding a part of the plurality of the pulling parts in the groove.

Technical Field

The present invention relates to a seat having a pad and a cover.

Background

A seat such as an automobile seat has the following seat structure: a cushion made of a foamed resin or the like is covered with a skin made of leather, vinyl leather or the like on a seat cushion supporting the buttocks of a sitting person or a seat back supporting the back of a sitting person.

For example, in the seat disclosed in patent document 1, the cover has a pulling portion at a joint of a plurality of sheet-like materials, and the pulling portion is inserted into a groove of the pad and fixed to a so-called inlay cable, which is a linear cable body provided inside the groove. As a method of fixing the pulling portion, the pulling portion is fixed to the embedded rope by engaging the pulling portion to the embedded rope with a C-shaped ring, which is a C-shaped wire material, using an attachment tool called a grommet clamp (hogronger) or the like.

However, in the seat structure shown in patent document 1, it is necessary to perform an operation of fixing the pulled portion of the skin to the inside of the groove of the pad by an attachment tool such as a snap ring pliers. Since the attachment tool such as the snap ring pliers is heavy, a large burden is imposed on the worker who performs the skin attachment work.

In the seat structure shown in patent document 1, when the pulling portion is fixed by the C-shaped ring, the skin is pulled locally (in a point-to-point range) by the C-shaped ring, and therefore wrinkles (for example, wrinkles extending radially) are likely to occur, and it is difficult to improve the appearance quality of the seat.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2018-52498

Disclosure of Invention

The present invention has been made in view of the above circumstances, and an object thereof is to provide a seat that can reduce the burden of skin assembling work and can improve the appearance quality of the seat.

In order to achieve the above object, the seat of the present invention comprises: a pad having a groove formed in an opposing surface facing the seated person; a skin covering the facing surface of the pad, having a pulling portion extending along the groove and pulled to an interior of the groove; a linear member extending in a longitudinal direction of the pulling portion and provided at an end edge of the pulling portion; and an elastically deformable cylindrical member provided inside the groove in the gasket so as to extend along the groove; wherein a slit is formed in an outer peripheral surface of the cylindrical member, the slit extending in a longitudinal direction of the cylindrical member, having a width smaller than an outer diameter of the linear member, and being capable of being expanded by elastic deformation of the cylindrical member.

Drawings

Fig. 1 is an exploded perspective view showing the entire configuration of a seat cushion according to an embodiment of a seat of the present invention.

Fig. 2 is a schematic cross-sectional view showing a state in which the skin of fig. 1 is mounted on the cushion.

Fig. 3 is an enlarged sectional view of a portion a of fig. 2.

Fig. 4 is a perspective view of the cylindrical member of fig. 3.

Fig. 5 is an enlarged perspective view showing a portion where a linear member is provided at an end edge of a pulled portion of the skin in fig. 2.

Fig. 6 is an enlarged perspective view showing a portion of the cylindrical member provided in the groove of the gasket of fig. 2.

Fig. 7 is a schematic cross-sectional view showing a state where the linear member is inserted into the tubular member at a cross-section taken along line VII-VII in fig. 6.

Fig. 8 is a plan view showing a state in which a cylindrical member is disposed in a groove disposed on four sides of a rectangular shape on an upper side surface of the gasket of fig. 1.

Fig. 9 is a front view of a roller pressing tool used when the linear member of fig. 7 is pressed.

Fig. 10 is a schematic view showing the moving direction of the roller pressing tool when the linear member is pressed into the slit of the cylindrical member in fig. 7 from above.

Fig. 11 is a perspective view schematically showing a method of inserting a linear member from an insertion opening on the front side of a cylindrical member as another method of attaching the linear member to the seat cushion of fig. 1.

Fig. 12 is a schematic view showing a preferred method for inserting the linear member of fig. 11 from the insertion opening on the front side of the cylindrical member, in which the cylindrical member is provided in the front-rear direction groove of the pad and the male-side member of the hook and loop fastener is provided in the lateral groove.

Fig. 13 is an enlarged perspective view showing a configuration in which a female member bonded to the male member of fig. 12 is provided in a skin-stretching portion.

Fig. 14 is a cross-sectional view of a linear member having a tapered protruding portion and a pair of engaging projections as a modification of the seat of the present invention.

Detailed Description

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Fig. 1 shows a structure of a seat cushion 1 for supporting the hip of a sitting person in a seat for an automobile as an example of an embodiment of the seat of the present invention. The seat cushion 1 shown in fig. 1 has a structure in which 3 seating portions are arranged in the lateral direction of a rear seat of an automobile.

As shown in fig. 1 to 6, the seat cushion 1 includes a pad 2, a skin 3 covering the pad 2, and a linear member 4 and a cylindrical member 5 for attaching the skin 3 to the pad 2.

The linear member 4 is attached to the pulling portion 3a of the skin 3, and the cylindrical member 5 is provided inside the groove 2b of the pad 2 (specifically, at the bottom of the groove 2 b). The assembly of the skin 3 can be achieved by inserting the linear member 4 into the cylindrical member 5.

Next, the respective components of the seat cushion 1 will be described in further detail.

The pad 2 has an upper side 2a which is a facing surface facing the seated person (particularly, near the buttocks). The cushion 2 of the present embodiment has 2 upper side surfaces 2a so that 3 seating portions are formed in a row in the lateral direction X of the seat cushion 1.

Each upper side surface 2a is formed with a groove 2b into which the pulling portion 3a of the skin 3 and the linear member 4 are inserted. The groove 2b extends so as to form four sides of a rectangular shape on the upper side surface 2 a. The grooves 2b of the present embodiment extend so as to extend from the corners of the four sides of the rectangular shape in the front-rear direction Y of the seat cushion 1.

The gasket 2 is made of a material having elasticity and a certain degree of conformality. The cushion 2 is manufactured by, for example, integrally foam-molding (integrated foam molding) a low-density and conformal bead foam and an elastic urethane resin. In the case of the integral foam molding, the cushion 2 becomes a lightweight cushion.

The cover 3 is configured to cover the upper surface 2a of the pad 2 and to be joined to each other at the end portions of a plurality of sheet-like members made of leather, vinyl leather, or the like. The skin 3 has a pulling portion 3a formed at the joint of the sheet-like material. The pulling portion 3a protrudes downward with respect to the surface of the epidermis 3. The pulling portion 3a extends along the groove 2b of the pad 2 and is pulled inside the groove 2 b. In the present embodiment, the pulling portion 3a extends so as to form four sides of a rectangular shape in accordance with the arrangement of the groove 2 b.

The linear member 4 extends in the longitudinal direction of the pulling portion 3a and is provided at an end edge 3b located at the lower end of the pulling portion 3 a. The linear members 4 of the present embodiment are provided in the pulling portions 3a that are pulled into the grooves 2b on the four sides, respectively.

As a method of attaching the linear member 4 to the pulling portion 3a, various methods can be adopted. For example, when the linear member 4 is a synthetic resin such as polypropylene (PP), the linear member 4 is welded to an end edge 3b extending downward from the back side of the pulling portion 3a of the skin 3 (see fig. 3). On the other hand, when the linear member 4 is a steel wire, a cylindrical bag is provided along the drawn part 3a at the end edge 3b of the drawn part 3a of the skin 3, and the steel wire is wrapped in the bag, whereby the linear member 4 can be attached. In addition, in order to facilitate insertion of the linear member 4 into the cylindrical member 5, it is preferable that it is a member that is difficult to bend (has a certain degree of bending rigidity).

The cylindrical member 5 is an elastically deformable cylindrical body, and as shown in fig. 6 and 8, is provided so as to extend along the groove 2b at the bottom of the groove 2b in the pad 2. The cylindrical member 5 may be provided inside the groove 2 b. Therefore, in addition to the structure in which the cylindrical member 5 is provided at the bottom of the groove 2b, the structure in which the cylindrical member 5 is held between the side walls on both sides of the groove 2b to support the cylindrical member 5 may be adopted.

A slit 5b (see fig. 3 to 4) that opens upward is formed in the outer peripheral surface of the cylindrical member 5. In other words, in the present embodiment, the slit 5b is directed upward or obliquely upward so as to be directed toward the inside of the groove 2b, specifically, toward the opening of the groove 2 b. The slit 5b extends in the longitudinal direction of the cylindrical member 5, penetrates the internal space 5a of the cylindrical member 5, and has a width δ 1 smaller than the outer diameter D3 of the linear member 4. The width δ 1 of the slit 5b can be enlarged based on elastic deformation of the cylindrical member 5 (specifically, elastic deformation in a direction of expanding the slit 5b by bringing the linear member 4 into pressure contact with the slit 5 b). An insertion opening 5c is formed at an end of the cylindrical member 5. In a state where the tubular member 5 is provided along the groove 2b extending in the front-rear direction Y of the seat cushion 1, the insertion opening 5c of the tubular member 5 is open to the front side of the seat cushion 1.

The cylindrical member 5 is made of synthetic resin such as polypropylene, for example. The tubular member 5 is preferably a member that is elastically deformed when the linear member 4 is inserted so that the linear member 4 can be easily inserted into the tubular member 5, and is preferably a member that is difficult to detach the linear member 4 from the tubular member 5 after being inserted into the tubular member 5.

The cylindrical member 5 may be provided so as to extend along the groove 2b inside the groove 2b in the gasket 2, and the method of providing the cylindrical member 5 is not particularly limited in the present invention. For example, it is only necessary to do as follows: a magnet is provided in advance in a mold for molding the pad 2 made of a foam member, the cylindrical member 5 such as a wire rod filled with iron is positioned inside the mold by the magnetic force of the magnet, and then the pad 2 made of a foam member is foam-molded inside the mold, whereby the cylindrical member 5 is fixed inside the pad 2 made of a foam member. In this case, the cylindrical member 5 may be disposed inside the groove 2b of the gasket 2 (specifically, at the bottom of the groove 2b) and fixed inside the gasket 2 so that the slit 5b of the cylindrical member 5 communicates with the inside of the groove 2 b. After the liner 2 is released from the mold, the iron wire or the like is pulled out from the cylindrical member 5, whereby the internal space 5a can be secured.

In the present embodiment, as shown in fig. 4 and 7, the cylindrical member 5 has an outer inclined surface 5d on the outer circumferential surface, which is inclined so as to extend radially inward (downward in fig. 4 and 7) of the cylindrical member 5 as it approaches the edge of the slit 5b from the circumferential direction of the cylindrical member 5.

As shown in fig. 4 and 7, the cylindrical member 5 has an inner inclined surface 5e inclined so as to extend radially inward of the cylindrical member 5 as approaching the edge of the slit 5b from the circumferential direction of the cylindrical member 5 on the inner circumferential surface of the cylindrical member 5.

As shown in fig. 4, the inner diameter D1 of the insertion port 5c is set to be wider than the inner diameter D2 of the other portion of the cylindrical member 5.

In the seat cushion 1 configured as described above, the tubular member 5 has a structure in which the skin 3 is fixed by inserting the linear member 4 into the tubular member 5 from one of the slit 5b and the insertion opening 5c of the tubular member 5. Therefore, the skin 3 can be assembled to the cushion 2 by the following 2 assembling methods.

1. Method for assembling skin 3 by inserting linear member 4 through slit 5b

As shown in fig. 5 to 6, first, the linear member 4 provided at the drawn portion 3a of the epidermis 3 and the end edge 3b thereof is inserted into the groove 2b formed on the upper side surface 2a of the pad 2.

Next, as shown in fig. 3 and 7, the linear member 4 inserted into the groove 2b is pressed downward and inserted into the slit 5b of the cylindrical member 5 provided at the bottom of the groove 2 b.

As a method of pressing the linear member 4 downward, for example, the following method can be employed: with the roller pressing tool 11 having the disk-shaped pressing roller 11a as shown in fig. 9 to 10, the operator can reliably insert the linear member 4 into the slit 5b of the tubular member 5 over the entire length by pressing the linear member 4 inserted into the groove 2b downward with the roller pressing tool 11 while reciprocating the roller pressing tool 11 along the groove 2b in the moving direction a as shown in fig. 10.

Thereby, the pulling portion 3a of the skin 3 is held inside the groove 2b of the pad 2 based on the coupling of the linear member 4 and the cylindrical member 5, and the work of assembling the skin 3 to the pad 2 is completed.

2. Method for assembling skin 3 by inserting linear member 4 through insertion opening 5c

As shown in fig. 11 to 12, the pulling portion 3a and the linear member 4 extending in the front-rear direction Y of the epidermis 3 are inserted from the front side of the pad 2 into the groove 2b extending in the front-rear direction Y of the pad 2.

At this time, as shown in fig. 4 and fig. 11 to 12, the linear member 4 is inserted into the insertion opening 5c opened to the front side of the tubular member 5 extending in the front-rear direction Y provided at the bottom of the groove 2b inside the groove 2b extending in the front-rear direction Y.

Thus, in the groove 2b extending in the front-rear direction Y of the pad 2, the pulled portion 3a of the skin 3 is held inside the groove 2b of the pad 2 based on the connection of the linear member 4 and the cylindrical member 5.

In addition, regarding the fixation of the pulling part 3a of the epidermis 3 in the groove 2b extending along the transverse direction X of the padding 2 shown in FIG. 12, although the linear member 4 can be inserted from the slit 5b of the cylindrical member 5 as in the assembly method of item 1 above, as a simpler method, as shown in fig. 12 to 13, a male member 6 (a sheet member having a large number of small hooks) of a hook and loop fastener (hook and loop fastener) may be provided continuously in the longitudinal direction of the groove 2b extending in the lateral direction X on the inner wall of the groove 2b in place of the cylindrical member 5, and a female member 7 (a sheet member having a large number of loop portions engageable with the hooks) of a hook and loop fastener capable of adhering to the male member 6 may be provided continuously in the longitudinal direction of the pulling portion 3a of the skin 3 in place of the linear member 4. The male member 6 and the female member 7 of the surface fastener may be provided intermittently in the longitudinal direction of the groove 2b and the pulling portion 3 a. The male member 6 and the female member 7 can be connected (or bonded) by engaging a large number of hooks of the male member 6 with a large number of ring portions of the female member 7.

By the male side member 6 and the female side member 7 of the hook and loop fastener being coupled (or bonded) by manual operation by an operator, the pulling portion 3a of the skin 3 can be easily held inside the groove 2b of the pad 2 even in the groove 2b extending in the lateral direction X. This completes the work of assembling the skin 3 to the cushion 2.

The male member 6 and the female member 7 of the surface fastener may be arranged in reverse. However, if the male member 6 having the hook is provided on the pulling portion 3a of the skin 3, the hook may catch various parts (for example, clothes or gloves of a worker) to hinder the work when the skin 3 is assembled, and therefore, it is preferable to provide the female member 7 having the loop portion on the pulling portion 3a of the skin 3 so as not to cause such a work hindrance.

(features of the present embodiment)

(1) The seat cushion 1 of the present embodiment includes: a linear member 4 extending in the longitudinal direction of the pulling portion 3a and provided at an end edge 3b of the pulling portion 3 a; the elastically deformable cylindrical member 5 is provided inside the groove 2b in the gasket 2 (specifically, at the bottom of the groove 2b) so as to extend along the groove 2 b. Further, a slit 5b is formed in the outer peripheral surface of the cylindrical member 5, the slit 5b extending in the longitudinal direction of the cylindrical member 5 and having a width δ 1 narrower than the outer diameter D3 (see fig. 7) of the linear member 4, and the width δ 1 can be enlarged by elastic deformation of the cylindrical member 5. Thus, by inserting the linear member 4 through the slit 5b in the outer peripheral surface of the tubular member 5, the linear member 4 provided in the pulled portion 3a of the skin 3 can be restrained inside the groove 2b of the pad 2 in a state where the pulled portion 3a is inserted through the slit 5b in the tubular member 5. Therefore, the assembling work of the skin 3 to the pad 2 can be performed without using a heavy tool such as a snap ring pliers, and the burden on the worker can be reduced.

Further, since the linear member 4 extending in the longitudinal direction of the pulling portion 3a is constrained inside the groove 2b, the force pulling the inside of the groove 2b can be applied to the pulling portion 3a by the linear member 4 over the entire range in the longitudinal direction of the pulling portion 3 a. Therefore, local wrinkles are less likely to be generated in the cover 3, and the appearance quality of the seat can be improved.

(2) In the seat cushion 1 of the present embodiment, an insertion opening 5e into which the linear member 4 can be inserted is formed at an end of the cylindrical member 5. Therefore, by inserting the linear member 4 from the insertion opening 5c at the end of the tubular member 5, the linear member 4 provided in the pulling portion 3a of the skin 3 can be restrained inside the groove 2b of the pad 2 in a state where the pulling portion 3a is inserted into the slit 5b of the tubular member 5. Therefore, the assembling work of the skin 3 to the pad 2 can be performed without using a heavy tool such as a snap ring pliers, and the burden on the worker can be reduced. In this case, the linear member 4 extending in the longitudinal direction of the pulling portion 3a is restrained inside the groove 2b, and the force pulling the inside of the groove 2b can be applied to the pulling portion 3a by the linear member 4 over the entire range of the longitudinal direction of the pulling portion 3 a. Therefore, local wrinkles are less likely to be generated in the cover 3, and the appearance quality of the seat can be improved.

In the present embodiment, the insertion opening 5c into which the linear member 4 can be inserted is formed at the end of the cylindrical member 5, but the present invention is not limited thereto, and the insertion opening 5c may not be provided. Even in this case, the linear member 4 can be inserted from the slit 5b of the cylindrical member 5.

(3) In the seat cushion 1 of the present embodiment, the inner diameter D1 of the insertion port 5c is set to be wider than the inner diameter D2 of the other portion of the cylindrical member 5. With this configuration, the operation of inserting the linear member 4 into the slit 5b can be easily performed.

(4) In the seat cushion 1 of the present embodiment, the cylindrical member 5 has an outer inclined surface 5d on the outer peripheral surface thereof inclined so as to extend radially inward of the cylindrical member 5 as approaching the edge of the slit 5b from the circumferential direction of the cylindrical member 5.

In this configuration, when the linear member 4 is inserted into the cylindrical member 5 through the slit 5b, it is brought into contact with the outer inclined surface 5d of the outer peripheral surface of the cylindrical member 5 and guided forward in the direction of the slit 5b by the inclined surface, and therefore, the operation of inserting the linear member 4 into the slit 5b can be easily performed.

(5) In the seat cushion 1 of the present embodiment, the tubular member 5 has an inner inclined surface 5e inclined so as to extend radially inward of the tubular member 5 as approaching the edge of the slit 5b from the circumferential direction of the tubular member 5 on the inner circumferential surface of the tubular member 5.

In this configuration, even when a tensile force acts on the skin-pulling portion 3a in a state where the linear member 4 is inserted into the tubular member 5 and a force acts on the outer side of the slit 5b of the tubular member 5, the inner inclined surface 5e of the tubular member 5 is pressed radially outward by the linear member 4, and the inner inclined surface 5e moves in a direction in which the width δ 1 of the slit 5b is narrowed. This can prevent the linear member 4 from coming off the cylindrical member 5 through the slit 5 b. As a result, the inner inclined surface 5e can function as a check valve that prevents the skin 3 from separating from the pad 2.

(6) In the seat cushion 1 of the present embodiment, when the structure is adopted in which the plurality of pulling portions 3a of the cover 3 are pulled by the plurality of grooves 2b of the pad 2, a hook and loop fastener (specifically, a hook and loop fastener including the male member 6 and the female member 7 in fig. 12 to 13) that detachably holds a part of the plurality of pulling portions 3a inside the groove 2b may be provided.

When the plurality of grooves 2b are formed in the pad as described above, the linear member 4 attached to the pulling portion 3a may be difficult to attach to the cylindrical member 5 depending on the position of the grooves 2b or the direction in which the grooves 2b extend (for example, the lateral direction X of the seat cushion 1). In this case, as described above, the pulling portion 3a can be easily detachably held in the groove 2b by the hook and loop fastener constituted by the male member 6 and the female member 7.

Therefore, by using the thread-shaped members 4 and the tubular members 5 both as the hook and loop fasteners, the skin 3 can be assembled by manual operation without using a tool such as the roller pressing tool 11.

Specifically, as shown in fig. 4 and 11 to 13, the linear member 4 attached to the pulling portion 3a is manually inserted into the insertion opening 5c that is open at the front side of the tubular member 5 provided at the bottom of the groove 2b with respect to the groove 2b extending in the front-rear direction Y, whereby the pulling portion 3a can be held inside the groove 2 b. On the other hand, the hook and loop fastener (the male side member 6 and the female side member 7) is manually coupled to the groove 2b extending in the lateral direction X, whereby the pulling portion 3a can be held inside the groove 2 b. As a result, the assembling work of the skin 3 can be easily performed by manual operation without using a tool such as the roller pressing tool 11 for the groove 2b in any one of the front-back direction Y and the lateral direction X.

(modification example)

(A) In the seat cushion 1 of the present embodiment, the linear member 4 is a linear member having a circular cross section, but the present invention is not limited to this. As a modification of the present invention, as shown in fig. 14, the linear member 4 may have a tapered protruding portion 4a at a portion of the outer peripheral surface of the linear member 4 that is spaced apart from the pulling portion 3 a. Specifically, the protruding portion 4a shown in fig. 14 is disposed at a portion (a lower portion in fig. 14) on the opposite side of the pulling portion 3a side, and protrudes in the insertion direction S (downward in fig. 14) of the linear member 4, that is, in a direction away from the pulling portion 3 a. In the case of this configuration, by moving the linear member 4 in the insertion direction S, the tapered protruding portion 4a of the linear member 4 is brought into pressure contact with the slit 5b of the cylindrical member 5, whereby the cylindrical member 5 is elastically deformed to easily expand the slit 5b, and as a result, the operation of inserting the linear member 4 into the slit 5b can be easily performed.

(B) As another modification of the present invention, as shown in fig. 14, the linear member 4 may have an engaging projection 4b on the outer peripheral surface of the linear member 4, the engaging projection being engageable with the inner peripheral surface of the cylindrical member 5. The engaging projections 4b project in a direction opposite to the insertion direction S of the linear member 4, and function as so-called barbs. Specifically, the pair of engaging projections 4b shown in fig. 14 project in directions away from each other at a distance from the pulling portion 3a and in directions opposite to the insertion direction S of the linear member 4 as described above. In the case of this configuration, even when a tensile force acts on the pulling portion 3a of the skin 3 to the outside of the slit 5b of the tubular member 5, the engaging projection 4b of the linear member 4 engages with the inner peripheral surface of the tubular member 5, and therefore, the linear member 4 can be prevented from coming off the tubular member 5 through the slit 5 b. As a result, the skin 3 can be prevented from being detached from the pad 2.

(C) In the above-described embodiments, the seat cushion of the automobile seat has been described as an example of the seat of the present invention, but the present invention is not limited to this, and the seat of the present invention can be widely applied to any seat having a cushion and a skin. As a modified example of the present invention, it may be a seat back that supports the back of a seated person in an automobile seat. In addition to the automobile seat, a seat installed in a vehicle such as an airplane or a railway, a sofa or a leather seat installed in a building or a room, or the like is also included in the seat of the present invention.

< summary of the embodiments >

The embodiments are summarized as follows.

The seat of the present embodiment includes: a pad having a groove formed in an opposing surface facing the seated person; a skin covering the facing surface of the pad, having a pulling portion extending along the groove and pulled to an interior of the groove; a linear member extending in a longitudinal direction of the pulling portion and provided at an end edge of the pulling portion; and an elastically deformable cylindrical member provided inside the groove in the gasket so as to extend along the groove; wherein a slit is formed in an outer peripheral surface of the cylindrical member, the slit extending in a longitudinal direction of the cylindrical member, having a width smaller than an outer diameter of the linear member, and being capable of being expanded by elastic deformation of the cylindrical member.

The seat of the present embodiment includes: a linear member extending in a longitudinal direction of the pulling portion and provided at an end edge of the pulling portion; an elastically deformable cylindrical member is provided inside the groove in the gasket so as to extend along the groove. Further, a slit is formed in the outer peripheral surface of the cylindrical member, the slit extending in the longitudinal direction of the cylindrical member and having a width narrower than the outer diameter of the linear member and being capable of being expanded by elastic deformation of the cylindrical member. Thus, by inserting the linear member through the slit in the outer peripheral surface of the tubular member, the linear member provided in the pulled portion of the skin can be restrained inside the groove of the pad in a state where the pulled portion is inserted through the slit in the tubular member. Therefore, the assembling work of the skin to the pad can be performed without using a heavy tool such as a snap ring pliers, and the burden on the worker can be reduced.

Further, since the linear member extending in the longitudinal direction of the pulling portion is constrained inside the groove, the force pulling the inside of the groove can be applied to the pulling portion by the linear member over the entire range in the longitudinal direction of the pulling portion. Therefore, local wrinkles are less likely to be generated in the skin, and the appearance quality of the seat can be improved.

In the seat described above, an insertion opening into which the linear member can be inserted may be formed in an end portion of the tubular member.

In the case of the above-described configuration, the linear member provided in the pulling portion of the skin can be restrained inside the groove of the pad in a state where the pulling portion is inserted into the slit of the tubular member by inserting the linear member from the insertion opening at the end portion of the tubular member. Therefore, the assembling work of the skin to the pad can be performed without using a heavy tool such as a snap ring pliers, and the burden on the worker can be reduced. In this case, the linear member extending in the longitudinal direction of the pulling portion is restrained inside the groove, and the force pulling the inside of the groove can be applied to the pulling portion over the entire range in the longitudinal direction of the pulling portion by the linear member. Therefore, local wrinkles are less likely to be generated in the skin, and the appearance quality of the seat can be improved.

In the seat described above, it is preferable that the insertion opening has an inner diameter that is set to be wider than an inner diameter of the other portion of the tubular member.

In the case of the above configuration, the operation of inserting the linear member into the slit can be easily performed.

In the seat described above, it is preferable that the cylindrical member has an outer inclined surface on the outer peripheral surface, the outer inclined surface being inclined so as to extend radially inward of the cylindrical member as approaching the edge surface of the slit from the circumferential direction of the cylindrical member.

In the case of the above-described configuration, when the linear member is inserted into the tubular member through the slit, the linear member abuts against the outer inclined surface of the outer peripheral surface of the tubular member and is guided in the direction toward the slit by the inclined surface.

In the seat described above, it is preferable that the tubular member has an inner inclined surface on an inner peripheral surface of the tubular member, the inner inclined surface being inclined so as to extend radially inward of the tubular member as approaching an edge of the slit from a circumferential direction of the tubular member.

In the case of the above-described configuration, even when a tensile force acting on the skin-pulling portion is applied to the outside of the slit of the tubular member in a state where the linear member is inserted into the tubular member, the inner inclined surface of the tubular member is pressed radially outward by the linear member, and the inner inclined surface moves in a direction to narrow the width of the slit. This prevents the linear member from coming off the cylindrical member through the slit. As a result, the inner inclined surface can function as a check valve that prevents the skin from separating from the pad.

In the above seat, it is preferable that the linear member has a tapered protruding portion at a portion of an outer peripheral surface of the linear member that is spaced apart from the pulling portion.

In the case of the above configuration, the operation of inserting the linear member into the slit can be easily performed.

In the above seat, it is preferable that the linear member has an engaging projection on an outer peripheral surface of the linear member, the engaging projection being engageable with an inner peripheral surface of the tubular member.

In the case of this configuration, even when a tensile force acts on the skin-pulling portion outside the slit of the tubular member, the engaging projection of the linear member engages with the inner peripheral surface of the tubular member, and therefore, the linear member can be prevented from coming off the tubular member through the slit. As a result, the skin can be prevented from being detached from the pad.

In the above seat, in the case of a configuration in which the plurality of pulling portions are pulled into the plurality of grooves, the seat may further include: and a hook and loop fastener for detachably holding a part of the plurality of the pulling parts in the groove.

When a plurality of grooves are formed in the pad as described above, the linear member attached to the pulling portion may be difficult to attach to the tubular member depending on the positions of the grooves or the extending direction of the grooves. In such a case, as described above, the use of the hook and loop fastener enables the pulling portion to be easily held inside the hook and loop fastener by manual operation.

As described above, according to the seat of the present embodiment, the burden of the skin assembling work can be reduced, and the appearance quality of the seat can be improved.