JP2022127647A - Structure for attaching coated cloth to chair - Google Patents

Abstract

An object of the present invention is to prevent a locking member from moving or slipping in a groove for upholstery in the longitudinal direction of the groove. SOLUTION: In an upholstery mounting structure in which an upholstery 8 having a locking member 9 on its periphery is inserted into an upholstery groove 18 of a frame body 6 to fix the upholstery 8, a is provided with a partition 50 for blocking movement of the locking member 9 in the longitudinal direction of the groove, and on the other hand, the locking member 9 is divided in the longitudinal direction of the groove at a position corresponding to the location where the partition 50 is provided. It is [Selection drawing] Fig. 7

Description

The present invention relates to a structure for attaching an upholstery of a chair. More specifically, the present invention utilizes a plate-shaped locking member provided at the edge of the upholstery and an upholstery groove provided in a structure for attaching the upholstery, such as the back frame, to attach the upholstery to the back frame. It relates to a mounting structure for mounting.

Conventionally, in an upholstery attachment structure of a chair, for example, a backrest, the upholstery is wrapped around the locking member sewn on the peripheral edge of the back surface of the upholstery into the upholstery groove provided on the side surface of the back frame. A method is adopted in which the tape is inserted with the tape and the upholstery is stretched (for example, Patent Literature 1). In other words, by placing a locking member (for example, a PP cord) to which the upholstery is sewn into the groove, the upholstery and the locking member are hooked in the groove and tension is applied to the upholstery so as to exert a restraining force. , to secure the upholstery to the upholstery mounting structure, such as the back frame.

JP 2011-45573 A

However, according to this upholstery mounting structure, the upholstery is locked in the direction opposite to the direction in which the upholstery is stretched, that is, the direction in which it is inserted into the groove (in other words, the direction perpendicular to the groove), and a strong binding force is exerted. However, since there is nothing to catch in the direction along the groove, that is, in the longitudinal direction of the groove, the binding force does not work, so the locking member may move or shift in the direction along the groove (slip against the groove). . Especially when the groove is long, the locking member may be displaced significantly in the length direction of the groove, impairing the design of the upholstery, or the locking member may slip out of the groove. In addition, if a seated person applies a force to push down or pull up the upholstery, the engaging member may move together with the upholstery, causing the upholstery to shift and wrinkle.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a structure for attaching a chair upholstery in which a locking member is prevented from moving or slipping along the groove.

The present invention, which achieves such objects, provides an upholstery mounting structure in which an upholstery having a locking member on its periphery is inserted into a groove for the upholstery to fix the upholstery, wherein a locking member is provided inside the groove for the upholstery. A partition is provided to prevent movement along the length of the groove, while the locking member is split along the length of the groove at a location corresponding to the location where the partition is provided.

Here, it is preferable that the upholstery groove is opened outside the side edges of a frame-shaped back frame having a pair of left and right side edges.

Moreover, it is preferable that the partition is provided at the starting point of the corner portion of the upholstery groove.

Furthermore, it is preferable that the partition is provided at the starting point on the side side of the lower corner portion of the back frame or the starting point on the side side side of the upper corner portion of the back frame.

Furthermore, the chair of the present invention preferably has a backrest to which the upholstery mounting structure according to any one of claims 1 to 4 is applied.

According to the upholstery attachment structure of claim 1, the partition is constructed inside the groove, and the locking member is fixed by regulating the movement in the longitudinal direction of the groove by hooking the locking member on the partition. Therefore, the occurrence of wrinkles due to displacement of the upholstery is eliminated. In addition, since the position of the locking member is restricted, variations in finish of the upholstery by workers are reduced.

Furthermore, even if wrinkles are generated when the upholstery is stretched on the back frame, the wrinkles are eliminated by pulling the upholstery while preventing the locking members from moving and slipping in the lengthwise direction of the grooves with the partitions. can be done. Therefore, the upholstery can be stretched by pulling the upholstery to remove the wrinkles and inserting the upholstery and the engaging member into the grooves, thereby obtaining a wrinkle-free upholstery.

BRIEF DESCRIPTION OF THE DRAWINGS It is the perspective view seen from the front top which shows one Embodiment of the chair to which this invention is applied. It is the perspective view seen from the back lower part of the same chair. It is the exploded perspective view seen from the rear bottom of the backrest. It is the exploded perspective view seen from the front top of the backrest. 4 is an enlarged perspective view of a side portion of the back frame; FIG. FIG. 10 is an explanatory view showing the relationship between the partition in the groove and the locking member at the boundary portion between the upper side edge of the back frame and the corner portion; FIG. 10 is an explanatory diagram showing the relationship between the partition in the groove and the locking member at the boundary between the lower corner portion of the side edge of the back frame and the connecting portion; Fig. 10 is an enlarged perspective view showing grooves and partitions at the boundary between the upper part of the side edge of the back frame and the corner part; FIG. 10 is an enlarged perspective view showing grooves and partitions at the boundary between corners and connecting portions of lower side edges of the back frame; 1 is a front view showing an example of a mesh upholstery for a backrest; FIG. FIG. 4 is an explanatory view showing a vertical cross-section of the vicinity of a connecting portion between the lower side portion of the backrest and the back support member; It is an explanatory view showing the positional relationship between the upholstery and the locking member until it is inserted into the upholstery groove of the frame, (A) is before folding the locking member, and (B) is the locking member once. Folded state (when rotated 180°), (C) shows the state where the locking member is folded twice (when rotated 360°), (D) shows the edge of the locking member and the upholstery in the upholstery groove of the frame. are inserted. Explanatory views showing the positional relationship between the upholstery and the locking member until they are inserted into the upholstery groove of the frame, (A) before folding the mesh upholstery, and (B) folding the upholstery once. 2 shows a state in which the locking member and the edge of the upholstery are inserted into the upholstery grooves of the frame body (at the time of 180° rotation).

Hereinafter, the configuration of the present invention will be described in detail based on the embodiments shown in the drawings. In this specification, "front or front" means the front or front of the chair and the seated person sitting on the seat of the chair in the backrest, and "rear or rear" similarly means the chair and the seated person. after or backwards. Also, the direction perpendicular to the front-rear direction in the horizontal plane is the left-right direction or width direction for the seated person or the chair in the backrest. In addition, in the backrest, the inner side is the side facing the seated person or the front-back vertical plane passing through the center of the chair, and the outer side is the side away from the seated person or the front-back vertical plane passing through the center of the chair. It is the side away from Furthermore, the “longitudinal direction of the groove” is a direction orthogonal to each of the “width direction of the groove” and the “depth direction of the groove”, and “along the groove” is the direction along the length of the groove. is synonymous with

1 and 2 show an embodiment of a chair to which the present invention is applied. This chair, for example, as shown in FIGS. 1 and 2, comprises legs 1 equipped with casters, a main frame 2 supported by the legs 1, and a main frame 2 supported to be swingable and interlocking with each other. It has a seat 3, a backrest 4, and armrests 5 fixed to both ends of a rear bridge frame 11 with screws or the like.

In the chair of this embodiment, the reaction force mechanism includes, for example, a reaction force mechanism using a spring that compresses the spring to obtain a reaction force when the back frame 6 tilts backward, and a seat spring mechanism that compresses the spring when the backrest tilts backward. A weight-sensing (or sensory) reaction force application mechanism is also used to make the resistance to back locking proportional to the weight of the user by interlocking the support member 30 so as to lift the rear side thereof. Of course, a chair having only one of the reaction force applying mechanism corresponding to body weight and the reaction force applying mechanism having a coil spring, for example, the seat moves backward in conjunction with the backward tilting of the backrest, and the rear end side sinks. Needless to say, it can also be applied to a non-weight-sensing synchronous locking mechanism, a locking mechanism in which only the backrest tilts backward independently, a locking mechanism in which only the seat performs a locking operation, and a chair without a locking mechanism. .

Here, in the case of the present embodiment, the main frame 2 is supported by the pedestal (in other words, gas spring) of the leg 1 so as to be rotatable in the horizontal plane, while the front of the main frame 2 is supported by a pair of left and right front links 41 . It is rotatably connected to the central bearing portion 34 of the front bridge frame 32 that supports the seat frame 31, and as shown in FIG. By connecting the portion 25, the seat 3 and the backrest 4 are swingably supported.

Although not shown, the main frame 2 incorporates a reaction force mechanism including, for example, a compression coil spring. It is provided between the frame 2 and a link shaft (not shown) on the front end side of the frame 2 so as to generate a force to push back the backrest 4 in conjunction with the backward inclination of the backrest 4 .

In the case of this embodiment, the backrest 4 is stretched between a back frame 6 forming a rectangular frame in front view and having a hollow inside as shown in FIGS. It consists of a mesh upholstery 8 forming a backrest surface, and is swingably mounted on the main frame 2 via a backrest support member 7. - 特許庁

In order to ensure the mechanical rigidity of the structure, the back frame 6 is preferably made of rigid synthetic resin such as glass-fiber reinforced nylon such as PA6-GF (polyamide 6).

As shown in FIGS. 3 and 4, the back frame 6 of the present embodiment has a lateral side 6b that protrudes generally forward (that is, a doglegged shape) in a side view, and a lower end portion of the lateral side 6b. It is formed in an L shape with the connecting part 21 protruding forward from the front, and has a curved shape that is generally convex toward the rear in plan view, and the inner side of a substantially vertically long rectangle in front view constitutes a hollow frame. Here, the lower side portion 20 forming the lower side of the frame body is positioned inside the corner portion 6d near the boundary between the side side 6b of the back frame 6 having an L shape in side view and the connecting portion 21. The connecting part 21 protruding further forward than it forms a U-shape surrounding the back frame mounting part 12 of the backrest support member 7, and the back frame mounting part 12 is formed in three directions: the left and right sides and the back surface. A structure is adopted in which the back frame attachment portion 12 is firmly connected to the back frame attachment portion 12 by being inserted so as to be sandwiched from the back.

Further, as shown in FIGS. 3, 4 and 7, the lower side portion 20 is provided with a guide surface 17 protruding toward the space inside the frame on the rear end side. The guide surface 17 is a curved surface curved in the front-rear direction, and presses the mesh upholstery 8 stretched over the front side of the back frame 6 from the front side to protrude rearward, thereby forming a curved surface with respect to the mesh upholstery 8. It is provided so as to model a corner part consisting of.

As shown in FIG. 4, the back mounting seat 10 on the front surface of the lower side portion 20 is formed with a flange groove 22 into which the flange 13 of the back frame mounting portion 12 is inserted. In the middle of this flange groove 22, a vertical rib 23 is formed across the groove (that is, the flange groove 22 is intermittently formed). An internal thread 24 is provided. On the other hand, the flange 13 of the back frame attachment portion 12 is intermittently circumferentially arranged so that the flange 13 can be inserted into the flange groove 22 without interfering with the vertical rib 23 provided in the flange groove 22. formed. That is, the lower side portion 20 of the back frame 6 also serves as a portion to be fitted to the back frame attachment portion 12 of the backrest support member 7 .

On the other hand, the backrest support member 7 has a rear bridge frame 11 and an annular back frame mounting portion 12 (rectangular frame with an empty space inside). The rear bridge frame 11 is a wing-shaped frame that extends left and right and curves upward. As a result, it is possible to bend in the vertical direction without interfering with the mesh and cushions constituting the seat structure (not shown).

Furthermore, at the center of the rear bridge frame 11, a bearing 25 for inserting and swingingly connecting the backrest rotation shaft 43 of the bracket 42 at the rear end of the main frame 2 is suspended obliquely downward and forward. and an arm portion 26 that receives and supports one member of the spring-type backrest reaction mechanism (not shown), and when the backrest 4 tilts backward, one of the spring-type backrest reaction mechanisms It is provided so as to constitute a spring-type backrest reaction force mechanism that pushes the member forward. Further, the upper surface of both ends of the rear bridge frame 11 is provided with mounting portions, ie, brackets 28 for mounting the rear brackets 33 of the outer frame 31 in a swingable manner. A flange 13 for inserting the back frame 6 from the rear is formed on the outer peripheral surface of the back frame mounting portion 12 so as to protrude rearward and to the left and right sides so as to surround the back frame mounting portion 12 . . In this manner, the backrest support member 7 supports the rear bridge frame 11, the bearing portion 25, the arm portion 26, the reaction force receiving portion 27, the back frame mounting portion 12, the seat frame mounting portion (bracket 28), and the armrest 5. It has a reasonable structure in which the seat portion for attachment (a recessed portion that can be screwed, hereinafter referred to as an elbow attachment seat 29) is integrated into one.

Therefore, the flange groove 22 formed in the back mounting seat 10 on the front surface of the lower side portion 20 forming the base of the frame of the back frame 6 is fitted to the flange 13 of the back frame mounting portion 12 of the backrest support member 7 . By screwing together, the back frame 6 and the backrest support member 7 are integrated to form a continuous L-shape when viewed from the side. For screwing, for example, a screw (not shown) is screwed from the inner side of the annular back frame mounting portion 12 toward the back mounting seat 10 to connect the back frame mounting portion 12 and the back frame 6 (that is, the back mounting seat 10). ). That is, the U-shaped back mounting seat 10 projecting forward of the back frame 6 and the back frame mounting portion 12 are connected and integrated without screws appearing on the outside. As a result, in this embodiment, the backrest support member 7 and the back frame 6 are continuous and form an L-shaped appearance in side view.

In this embodiment, the attachment of the mesh upholstery 8 to the back frame 6 consists of grooves (also referred to as upholstery grooves 18) for inserting the edges of the mesh upholstery 8 and the locking members 9, and the periphery of the mesh upholstery 8. That is, by inserting the mesh upholstery 8 and the locking member 9 into the upholstery groove 18 and hooking them.

Here, the upholstery groove 18 is a groove in which the locking member 9 and the edge of the upholstery 8 cannot be inserted unless the direction is changed from the direction in which the tension is applied, preferably in the opposite direction. is formed as For example, grooves 18 for upholstery are provided in the upper side 6a and the side edge 6b of the back frame 6 and the bottom side facing the outside, and the mesh upholstery is inserted into the back frame 6 while applying tension to the mesh upholstery. 8 is fixed. Specifically, in the case of the present embodiment, the upper side 6a of the back frame 6, the upper corner (the upper side 6a and the side) are provided on the side surface of the back frame 6 facing the outside, except for the lower side 20 which is the base of the back frame 6. curved region connecting side 6b) 6c, side 6b, lower corner portion (curved region connecting side 6b and connecting portion 21) 6d, and connecting portion 21 as one continuous groove of back frame 6 It is provided on the side facing outwards.

In this embodiment, the upholstery groove 18 of the lower side portion 20 forming the bottom side of the frame is not formed in the back frame 6 itself, but is formed in the lower back mesh attachment member 14 which is a separate member. It is provided so as to be attached to the lower side portion 20 of the back frame 6 via the lower mesh attachment member 14 . In the case of this embodiment, as shown in FIG. 11, the lower back mesh attachment member 14 has, for example, a substantially U-shaped cross section, and is attached so as to cover the back surface of the lower side portion 20 under the guide surface 17. fixed. On the inner surface facing the back surface of the lower side portion 20 of the lower back mesh mounting member 14, the edge of the mesh upholstery 8 and the locking member 9 are folded back once or twice and then inserted and fixed. A ground ditch 15 is provided. In addition, the front surface of the lower back mesh mounting member 14, that is, the surface facing the back surface of the lower side portion 20, is provided with a hole for screwing a fastening screw 16 that is screwed from the front side of the lower side portion 20, and the mesh upholstery 8 is provided. The lower back mesh attachment member 14 is connected to and integrated with the back frame 6 while being inserted into the upholstery groove 15 . Therefore, the lower end portion of the mesh upholstery 8 stretched on the front surface of the back frame 6 is sandwiched between the back surface of the lower side portion 20 and the back surface of the guide surface 17, and near the guide surface 17, as shown in FIG. In addition, it is attached to the back side of the guide surface 17 to form a curved surface without corners.

Further, in the upholstery groove 18 formed as a continuous groove from the upper side 6a of the back frame 6 to the connecting portion 21, a partition for restricting the movement and deviation of the locking member 9 in the longitudinal direction of the groove is provided. 50 is constructed to partially disrupt the interior of the trench. The partition 50 is not limited to be installed at a specific location, but it is effective that it is preferably located at the starting point of the corner portion of the upholstery groove 18, that is, the starting point. In the case of the present embodiment, for example, as shown in FIGS. 8 and 9, in the area including the grooves 18c located at the corner portions 6c at both ends of the upper side 6a of the back frame 6 and in front of the back frame 6 which is L-shaped in side view. A partition 50 is constructed at or near the beginning of the area containing the groove 18d located at the bend corner 6d. More specifically, in the case of this embodiment, partitions 50 are provided at the boundary between the upper corner portion 6c and the side edge 6b of the back frame 6 and at the boundary between the lower corner portion 6d and the side edge 6b. there is Of course, even if the partitions 50 are provided at the start starting positions of the upper corner portion 6c and the lower corner portion 6d and the locking member 9 is not divided at the corresponding locations, the partitions 50 of one corner portion, particularly the lower corner portion 6d, and the partition 50 of the lower corner portion 6d can The locking member alone can be effective in preventing wrinkle smoothing and upholstery slippage.

The partition 50 does not necessarily block the groove 18 over the entire width or depth, as long as it can prevent the lateral movement of the locking member 9, that is, the movement in the lengthwise direction of the groove. For example, in the case of the present embodiment, the rib-shaped (stripe) partition 50 is used, but it is not limited to this form. It may be a protrusion that closes the groove, or a protrusion that differs in width or shape between the bottom side and the opening side of the groove. Moreover, the partition 50 does not need to be partitioned up to the height of the opening of the groove 18, and preferably has a slightly recessed height by being divided by a partition with a height shallower than the depth of the groove. In this case, since the upholstery caught in the locking member does not swell and protrude from the groove near the boundary between the divided locking members, it looks like a single piece. It looks like the upholstery is inserted into the groove, and it looks good.

Also, the size of the partition 50 is not subject to any particular restrictions, but it should have the minimum thickness, height, and width that at least ensure the strength to limit the movement of the locking member in the lengthwise direction of the groove. is preferred. That is, the interval between the divided locking members, in other words, the thickness of the partition 50 (dimension in the lengthwise direction of the groove) is such that the edge of the upholstery inserted into the upholstery groove 18 looks like a single upholstery. It is preferable to make the groove as narrow as possible in order to provide a tensioned state comparable to the state in which the locking member 9 is entirely contained in the groove. From this point of view as well, it is preferable that the rib-like (line) partition 50 has a height shallower than the depth of the upholstery groove.

On the other hand, as the locking member 9, for example, a flat polypropylene cord (generally called a PP cord) having a thickness of about 1 mm and a rectangular cross section can be used. This flat PP cord having a rectangular cross section is relatively stiff in the width direction (longitudinal direction) and exhibits flexibility in the thickness direction (lateral direction). Accordingly, the PP cord is easily bent along the lower corner portion 6 d of the back frame 6 and is easily inserted into the groove 18 . However, the locking member 9 is not limited to the PP cord described above. In this embodiment, the locking member 9 is arranged and sewn along the perimeter of the mesh upholstery 8 so that it is arranged longitudinally in the upholstery groove 18 together with the mesh upholstery 8 (i.e., The PP cord is inserted into the groove with the width direction showing rigidity as the direction of insertion into the groove. The mesh upholstery 8 is given a desired tension by heat setting (meaning that a portion of the mesh upholstery whose periphery is fixed by a frame is heat-treated and molded by heat shrinking to give a desired tension). .

The locking member 9 of the backrest 4 of this embodiment is divided in the longitudinal direction at least at the portion corresponding to the partition 50 constructed inside the groove 18, and the partition 50 is sandwiched or at least on one side of the partition 50. ) are provided so as to face each other. For example, in the case of this embodiment, partitions 50 are provided at the boundary between the upper corner portion 6c and the side edge 6b of the back frame 6 and at the boundary between the lower corner portion 6d and the side edge 6b. 10, a first cord 9a fitted in an area including the upper side 6a of the back frame 6 and corner portions 6c at both ends thereof, a second cord 9b and a third cord 9c fitted in both side sides 6b, and side sides. It is divided into 6 sections, a fifth cord 9f and a sixth cord 9g fitted in the corner portion 6d near the boundary from the lower portion of 6b to the connecting portion 21, and a fourth cord 9d fitted in the lower side (bottom side) of the back frame. Although the dividing surface (end surface) of the locking member 9 is not limited to the direction perpendicular to the longitudinal direction, it is not intentionally cut obliquely with respect to the perpendicular direction, and this is not to be denied. The opposing surfaces of the locking member 9 and the partition 50 are in a relationship such that when the locking member 9 is pressed against the partition 50, a component of force is generated in the direction of separating the locking member from the groove. Although it is desirable to have such a surface, there is no problem even if the surface is inclined to some extent because the above-mentioned component of force is suppressed by the tension acting on the upholstery.

In addition, in the case of the present embodiment, at the boundary between the first cord 9a and the second cord 9b and the third cord 9c, a notch 47 is made in the mesh upholstery 8 along the end face of each cord so that the first cord 9a, the second cord 9b and the third cord 9c are separated so that each cord can be folded back. Of course, the mesh upholstery 8 may be folded back as a continuous edge without forming the notch 47 . Also, in the boundary portions between the second cord 9b and the fifth cord 9f and between the third cord 9c and the sixth cord 9g, cuts are made in the mesh upholstery 8 along the end faces of each cord (not shown). may be inserted between the second cord 9b and the fifth cord 9f and between the third cord 9c and the sixth cord 9g to allow folding of each cord, or a mesh upholstery 8 may be folded back as a continuous edge without notching.

The first cord 9a has a substantially U-shape similar to the contour shape of the back frame 6 as a frame including the upper side 6a of the back frame 6 and the corner portions 6c at both ends thereof. and a curved corner portion 9e along the upholstery groove 18 opening on the side surface of the corner portion 6c. The first cord 9a is sewn on the surface side of the mesh upholstery 8 along the edge. The first cord 9a of the present embodiment has corner portions 9e continuously formed at both ends thereof, and thus is sewn on the surface side of the mesh upholstery 8. , it may be sewn on the back side of the mesh upholstery 8 so that it can be folded back once. In this case, only the corner portion 9e, which is an independent part, is sewn to the surface side of the mesh upholstery 8 so that it can be folded twice so that it can be fitted into the corner portion 18c of the upholstery groove.

On the other hand, the second and third cords 9b, 9c are inserted into the upholstery grooves 18 of the substantially straight side edges 6 of the back frame 6. As shown in FIG. Here, in the case of the backrest 4, there is a risk that the mesh upholstery 8 will be easily torn at the outer edge portion of the side 6a where there is a risk of colliding with a relatively hard material such as the top plate of a chair. . In order to prevent this, at the outer edges of the sides 6a of the back frame 6, a material such as an elastomer material that functions as a cushioning material is placed between the mesh upholstery 8 outside the upholstery groove 18 and the back frame 6. Interposition is preferred.

Therefore, in the case of the present embodiment, the second and third cords 9b and 9c are known PP cords with elastomer (for example, 2020-62350) is adopted. Although not shown, the insertion portion is made of a synthetic resin such as polypropylene (eg, polypropylene ( PP). On the other hand, the elastomer portion is preferably made of a material such as an olefinic thermoplastic elastomer which is interposed between the mesh upholstery 8 and the side 6b of the back frame 6 and functions as a cushioning member against the collision of external objects. Since it is preferable to integrate the elastomer material and the locking member in terms of handling, for example, a resin cord in which the insertion portion and the elastomer portion are integrated by two-color extrusion molding (that is, a PP code). In this case, the elastomer portion is folded back while the insertion portion, which is a locking member, is inserted into the groove 18b of the side 6b, and the mesh upholstery 8 and the front surface of the side 8b outside the groove 18 for upholstery are folded back. Since it is arranged so as to be sandwiched between and, the elastomer part will raise the mesh upholstery 8. Therefore, as shown in FIG. 6, the side 6b of the back frame 6, particularly from the edge of the upholstery groove 18b to the front side of the back frame 6, is recessed so as to be lower than the peripheral surface by the amount of the elastomer portion. 19 is formed. As a result, even if the elastomer part is interposed between the mesh upholstery 8 and the side 6b of the back frame 6, there is no difference in level with the surface of the surrounding back frame. In addition, it is designed to reduce discomfort when touched.

Here, according to the second and third cords 9b and 9c made up of locking members with elastomer parts, after being stitched to the surface side of the mesh upholstery 8, when folded back twice (rotated 360°), the elastomer parts is positioned inside the back side of the mesh upholstery, so that the elastomer portion is inserted into the upholstery groove 18 . Therefore, the second and third cords 9b and 9c, which are locking members with elastomer, are inserted along the periphery of the mesh upholstery 8 on the back side of the mesh upholstery 8, as shown in FIG. ) are placed on the outside and the elastomer parts are placed on the inside respectively and attached to the mesh upholstery 8 by sewing. Then, the insertion portion (locking member portion) and the elastomer portion are folded once (rotated 180°) at the boundary portion, and the insertion portion (locking member portion) and the mesh upholstery 8 are separated from each other by the upholstery groove 18 . is designed to be inserted into

In addition, the fifth cord 9f and the sixth cord 9g have a length to be fitted into the groove 18d on the lower tip side of the back frame, and are sewn along the edge on the surface side of the mesh upholstery 8 in the same manner as the first cord 9a. attached. Here, the fifth cord 9f and the sixth cord 9g are sewn with a necessary and sufficient space between the lower ends of the second cord 9b and the third cord 9c to allow the partition 50 to be inserted. ing. The fifth cord 9f and the sixth cord 9g are not only sewn on the surface side of the upholstery like the first cord 9a, but may also be sewn on the back side like the second and third cords 9b and 9c. It is also possible to sew it to the front side of the upholstery and fold it once to insert it into the groove 18d. .

Furthermore, in the case of this embodiment, the fourth cord 9d is attached via a lower back mesh attachment member 14 fixed to the bottom portion 20 of the back frame 6, as shown in FIG. 11, for example. In the case of this embodiment, the lower back mesh attachment member 14 is gently curved rearward at the central portion when viewed from below. Accordingly, the upholstery groove 15 formed on the inner surface of the lower back mesh attachment member 14 and the fourth cord 9d inserted therein are also gently curved rearward as a whole. Therefore, the fourth cord 9d is sewn to the surface of the mesh upholstery 8 in the same manner as the first cord 9a, and is folded twice to bend in the same direction as the upholstery groove 15 of the lower back mesh attachment member 14. I'm trying to plug it in. Then, for example, while the mesh upholstery and the PP cord 9 are inserted, the lower back mesh attachment member 14 is placed on the back side of the back attachment seat 10 of the back frame 6, and screwed from the front to secure the back frame 6. is fixed to

The attachment position of the locking member 9 and the mesh upholstery 8, for example, the sewing point 44, is not limited to the central position in the width direction. The effect of facilitating the insertion of the mesh upholstery 8 into the groove 18 is not lost. Furthermore, when the sewn point 44 of the first cord 9a to the mesh upholstery 8 is set approximately at the center position in the width direction of the cord 9a, the distance corresponding to the width of one cord is folded back by two folds. Therefore, the ends of the first cord 9a, that is, the ends of the corner portions 9e are arranged at the same positions as when the second and third cords (PP cords with elastomer) 9b and 9c are folded once. Therefore, in the folded state, the corner portions 9e at both ends of the first cord 9a and the ends of the second and third cords 9b and 9c are at the same positions, that is, there is no discrepancy in the cord positions in the insertion direction of the groove for upholstery. Gone. In addition, since the corner portions 9e at both ends of the first cord 9a, which is curved inward, return to the original curved state by rotating 360°, the curved shape of the upholstery groove 18 of the back frame 6 (upper side 9a and It has a shape along the corner portion 9c between the side edge 9b and can be inserted into the upholstery groove 18 of the back frame 6. Therefore, there is no possibility that the mesh upholstery 8 will come off at the corner portion 9e.

According to the mesh upholstery attachment structure configured as described above, the partition 50 constructed inside the upholstery groove 18 prevents the locking member 9 from moving in the groove length direction (horizontal displacement). Therefore, the upholstery is installed by inserting the locking member and the edge of the upholstery into the upholstery groove toward the upper side of the backrest while applying tension to the upholstery 8 along the groove to smooth out the wrinkles. easier to do.

For example, first, the fifth cord 9f and the sixth cord 9g are folded twice in the short groove 18d separated by the partition 50 in the corner portion 6d curved in the front-rear direction at the bottom of the back frame 6 (in the case of sewing on the back surface, one time) and then push it in. Then, by preventing the fifth cord 9f and the sixth cord 9g from laterally slipping in the groove with the partition 50, tension is applied to the upholstery 8 along the groove to firmly smooth out the wrinkles, and then the upper The upholstery is fixed while inserting the second cord 9b and the third cord 9c and the edge of the upholstery into the groove 18c of the side 6b.

Here, since the wrinkles of the upholstery 8 can be eliminated from the portion exposed outside the groove 18, even if the locking member 9 and the upholstery 8 are sewn together, smoothing out the wrinkles of the upholstery is difficult. never. As a result, wrinkles of the upholstery caused by the difference in radius of curvature between the portion of the upholstery 8 stretched on the surface side of the back frame 6 and the portion inserted into the groove 18 near the corner portion 6d. can be eliminated by stretching the upholstery. In other words, even if wrinkles are generated in the upholstery 8 when the upholstery 8 is stretched against the back frame 6, the division of the upholstery 8 near the partition 50 at the start starting point on the side 6b side of the corner portion 6d can be prevented. When the stop members 9f and 9g are pushed into the groove 18d of the corner portion 6d, the partition 50 restricts the movement and displacement of the groove in the longitudinal direction. The upholstery 8 can be stretched by pushing the locking members 9b and 9c into the grooves 18b of the side 9b.

On the other hand, the first cord 9a sewn on the surface side of the mesh upholstery 8 is folded back to the back side, so that the mesh upholstery 8 is centered around the sewn location (that is, attachment location) 44 of the first cord 9a. It is turned over, and the tip side portion (in other words, the edge side of the upholstery) 8e is folded back from the sewing point 44 (see FIGS. 12A and 12B). Then, by folding back again (for convenience, rotating the locking member 360°), the mesh upholstery 8 is turned up around the tip of the first cord 9a (in other words, the edge side of the mesh upholstery 8). Then, the mesh upholstery 8 on the inner side of the sewn portion 44 is folded back (see FIG. 12(C)). At this time, the edge side portion 8e of the mesh upholstery 8 is caught in the folded portion, and a part of the first cord 9a, that is, the portion 45 inside the sewn portion 44 is exposed and exposed, and the edge of the upholstery is exposed. shape is adjusted. In other words, while the cords 9 sewn on the surface side of the mesh upholstery 8 and the mesh upholstery 8 make two turns, the mesh upholstery 8 is folded back from the sewing point 44 and further the proximal ends of the cords 9 are folded back. Since the cord 9 is wound around the edge of the side portion 46, the cord 9 is inserted into the upholstery groove 18 with the tip portion 45 exposed. Therefore, it becomes easy to insert the engaging member/first cord 9a and the mesh upholstery 8 into the upholstery groove 18, and the edge of the mesh upholstery 8 does not protrude from the upholstery groove 18, which improves the appearance. In addition, the operation of pushing the edge of the mesh upholstery 8 into the groove 18 becomes unnecessary. The same applies to the fourth chord 9d.

Here, the first cord 9a and the mesh upholstery 8 are folded twice (that is, rotated 360°) at the inwardly curved corners 9e (toward the upholstery side) at both ends of the first cord 9a. ), the corner portion 9e returns to its original curved state, i.e., inwardly curved state. The corner portion 9e will be formed. That is, the groove 18 for upholstery opening on the side surface of the back frame 6 has a shape along the curved shape of the corner portion 9c of the corner portion 6c, so that it can be inserted. Therefore, there is no possibility that the mesh upholstery 8 and the locking member 9e will come off at the corner portion 6c of the back frame 6. FIG. Moreover, since the partition 50 is formed in the groove 18 at the starting point on the side 6b side of the corner portion 6c of the upholstery groove 18, for example, the locking member 9b or 9c can be attached to the locking member 9b or 9c through the upholstery 8. Even if an upward force is applied, the locking member 9b or 9c housed in the groove 18 of the side 6b of the back frame 6 will not shift upward beyond the partition 50. - 特許庁Therefore, the corner portion 9e of the first cord 9a housed in the corner portion 6c is not pushed out of the groove 18. As shown in FIG.

In addition, even if the seated person unconsciously grabs the backrest and applies a force to push down the upholstery 8, the partition 50 prevents the PP cords accommodated in the upholstery grooves 18 from slipping sideways, so that the upholstery 8 is prevented from slipping into the grooves. There is no wrinkling along the length of the (i.e., lateral) shift.

1 and 2, the seat 3 includes a mesh upholstery 37 forming a seat surface, an annular inner shell 35 to which the mesh upholstery 37 is attached, and a seat support member 30 including an outer shell 31. and is mounted on the main frame 2 so as to be swingable by the front link 41 of the main frame 2 and the backrest support member 7 via the seat support member 30 . Since the external force/load applied to the seat 3 is greater than that of the backrest 4, an ear portion 39 for screwing is provided, and as shown in FIG. It is preferable that the inner shell 35 be fixed to the inner shell 35 with, for example, a fastening screw 40 from the lower surface side of the inner shell 35 while being inserted into the inner shell 35 .

The attachment of the mesh upholstery 37 to the inner shell 35 of the seat 3 of this embodiment is achieved by attaching the mesh upholstery 37 provided with locking members 38 such as PP cords along the periphery, for example, in the same manner as in the case of the backrest 4 described above. 37 may be fitted together with a locking member 38 into an upholstery groove 36 formed on the outer peripheral side surface of the inner shell 35 (see FIG. 12B), or a cylindrical portion at the edge of the upholstery. It may be fixed by tightening a string (not shown) passed through and squeezing the edge.

Although the form of the attachment structure of the mesh fabric described above is an example of the preferred form of the present invention, it is not limited to this and can be variously modified without departing from the gist of the present invention. For example, in the above-described embodiment, the partition 50 is provided at the starting position of both the corner portion 6c and the corner portion 6d, and the locking member 9 is divided, especially focusing on preventing wrinkles in the upholstery 8. However, it is not particularly limited to this. By splitting and preventing lateral movement of the locking member 9, the locking member can be easily fitted into the groove 18 and the upholstery 8 can be stretched evenly. In other words, the partition 50 prevents the locking member inserted into the groove of the back frame from slipping sideways, and wrinkles of the upholstery 8 can be easily smoothed out, so that the locking member and the edge of the upholstery can be easily pushed into the groove 18.例文帳に追加Also, although not shown, when the upholstery is applied to a frame having a plurality of curved portions formed at intervals, it may be applied to each curved portion, or the plurality of curved portions may be continuous. When the upholstery is applied to a frame having a wavy shape, a partition 50 may be provided at an appropriate location to divide the engaging member.

Furthermore, in the above-described embodiment, the partitions 50 are provided at both the starting point of the upper corner portion 6c of the back frame 6 on the side 6b side and the starting point of the lower corner portion 6d on the side 6b side. However, it is not particularly limited to this, and only one of them may be used.

Furthermore, in the above-described embodiment, one upholstery groove 18 is divided into a plurality of grooves by partitions 50 whose height is shallower than the groove depth, thereby preventing the PP cord from slipping. is not particularly limited to, and a plurality of completely independent grooves, for example, the groove 18a of the upper side 6a, the groove 18c of the upper corner portion 6c, the groove 18b of the side side 6, and the groove 18d of the lower corner portion 6d. may be provided on the side surface of the back frame 6 facing the outside.

Further, in the present embodiment, an example of the first cord 9a in which a linear portion and a curved corner portion are continuously formed in the locking member 9 fitted to the upper side 6a portion of the backrest will be described. However, it is not particularly limited to this, and only one end of the first cord 9a is provided with the corner portion 9e, or other cords, such as the second and third cord sides, are provided with the corner portion 9e. Only 9e may be made independent as a locking member. In addition, it is not necessary to provide the locking member 9 along the entire periphery of the upholstery. The base 8 may be fitted into the groove 18c while adjusting the appearance by pressing the base 8 using a jig or the like. In this case as well, providing the partitions 50 for preventing movement of the engaging members in the straight grooves reaching the corners, and the partitions 50 for preventing movement of the lateral engaging members reaching the corners, It is effective in smoothing out or preventing wrinkles in the upholstery. In other words, the presence or absence of the engaging member 9 at the corner portion 9c is irrelevant in the present invention.

In addition, although the example in which the PP cords with elastomer, that is, the second cords 9b and the third cords 9c are fitted to the side 6b of the backrest has been described, the present invention is not limited to this, and for example, an elastomer portion may be provided. PP codes such as the first code 9a and the fourth code 9d may be used. In this case, it is preferable to sew the locking member on the surface side of the mesh upholstery 8 and fold it twice so that it is inserted into the groove 18b. Needless to say, the PP cord may be sewn and folded back once to be inserted into the groove 18b.

Furthermore, in the above-described embodiment, the partitions 50 are arranged at the starting points of the upper corner portions 6c or the lower corner portions 6d of the left and right sides 6b of the back frame 6 (four locations in total). The position and number of the 50 are not limited to the above examples. It may be more, or it may be less depending on the case. Also, the location where the partition 50 is installed is not limited to the start point of the corner portion 6c or 6d, and may be located at a location away from the corner portion 6c or 6d. In any case, if the number of partitions 50 is excessive and the locking member 9 is divided too finely, the tension imparted to the upholstery 8 may be uneven and wrinkles may occur. Minimal is preferred.

In addition, the method of attaching the locking member (for example, PP cord) 9 to the mesh upholstery 8 is not limited to a specific method as long as it can be attached in a reversible manner. Other methods such as adhesion and welding are also possible, but sewing is preferred.

In addition, the configuration of the chair to which the present invention can be applied, in particular, the specific shape and aspect of each component such as the back frame 6 that constitutes the frame on which the mesh upholstery is stretched, is the same as in the above-described embodiment. It is not limited, and is appropriately selected based on the use and design of the chair.

Furthermore, in the above-described embodiment, the present invention has been described mainly by citing an example in which the mesh upholstery is fixed to the upholstery grooves of the left and right sides 6b of the back frame 6 of the chair, but the present invention is particularly limited to this. Instead, it is of course applicable to fixing the upholstery to upholstery attachment structures other than the back frame of the backrest of a chair, such as the seat, headrest, armrests, and the like. In addition, as for the shape of the backrest, only the chair according to the above-described embodiment (so-called mesh chair) in which the upholstery grooves on the upper, lower, right, and left sides of the back frame are covered with the upholstery that gives the desired tension by heat shrinkage. Alternatively, a chair with a backrest in which a shell member is placed inside and the shell member is covered with a cushion material and upholstery, or a chair with a backrest that covers the front surface of the backrest shell made of a resin molded product with upholstery. However, the edge of the upholstery is provided with a plate-shaped locking member, and it is applied to the upholstery mounting structure in which the upholstery is pushed into the groove for the upholstery provided in the back frame, for example, the upholstery and fixed. It goes without saying that we can.

4 backrest 6 back frame 6a upper side 6b side side 6c upper corner portion 6d lower corner portion 7 backrest support member 8 mesh upholstery (for backrest)
9 locking member 9a first cord 9b second cord 9c third cord 9d fourth cord 9e corner portion 9f fifth cord 9g sixth cord 10 back mounting seat 11 rear bridge frame 12 back frame mounting portion 13 flange (back frame mounting part)
14 lower back mesh mounting member (part of back frame)
15 Upholstery groove (of lower back mesh mounting member)
16 fastening screw 17 guide surface (back frame)
18 Upholstery groove (of back frame)
18a Upholstery groove on upper side 18b Side upholstery groove 18c Upper corner upholstery groove 18d Lower corner upholstery groove 19 Front recess 20 on side of back frame Lower side of back frame 21 Connection Part 22 Flange groove (for flange 13)
23 longitudinal rib (flange groove 22)
24 internal thread (flange groove 22)
25 Bearing (of backrest support member)
26 arm part (of backrest support member)
27 reaction force receiving part (of backrest support member)
28 Bracket (supports the outer shell)
44 Sewing point between upholstery and locking member 45 Inner part 46 Inner part 46 Inner part 47 Incision in upholstery 49 End of groove 50 Partition (in groove for upholstery)

Claims (6)

In an upholstery mounting structure in which an upholstery having a locking member on its periphery is inserted into an upholstery groove to fix the upholstery,
A partition is provided inside the upholstery groove to prevent the locking member from moving in the longitudinal direction of the groove,
On the other hand, the upholstery mounting structure is characterized in that the locking member is divided in the longitudinal direction of the groove at a position corresponding to the location where the partition is provided. 2. The upholstery attachment structure according to claim 1, wherein said upholstery groove is opened outside said side edges of a frame-shaped back frame having a pair of left and right side edges. 3. The upholstery attachment structure according to claim 1, wherein said partition is provided at a starting point of a corner portion of said upholstery groove. 3. The upholstery attachment structure according to claim 2, wherein said partition is provided at a start point on the side side of the lower corner portion of said back frame. 3. The upholstery mounting structure according to claim 2, wherein said partition is provided at a starting point on the side side of the upper corner portion of said back frame. A chair comprising a backrest to which the upholstery mounting structure according to any one of claims 1 to 5 is applied.

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