JP5636250B2 - Locking structure of tension fabric and locking method of tension fabric - Google Patents

Description

  The present invention relates to a locking structure for a frame of a tension fabric constituting a surface for supporting a body such as a chair seat or a backrest, and a method for locking the tension fabric. More specifically, the present invention relates to a tensioning structure locking structure and a tensioning pattern locking method suitable for preventing the tensioned area from coming off from the corner of the frame.

  In recent years, there have been proposed structures such as a backrest and a seat of a chair in which an edge of a tension fabric having sufficient strength and elasticity to support the body is attached to the frame so that the body is supported by the tension fabric. The structure for locking the stretch fabric to the frame is a resin in which a groove is provided on the side surface of the frame that supports the edge of the stretch fabric or an alternative tension backup member, and the edge of the stretch fabric is sewn to the edge of the groove. A tension plate is locked to a frame or a tension backup member by being fitted back so as to be folded back with a made locking plate (hereinafter referred to as a cord).

  For example, as shown in FIG. 9, grooves 104x are formed on the upper side surface of the horizontal frame 104a and the outer side surfaces of the left and right vertical frames 104b of the tension backup material 104 supported by the back frame 103, and the backrest tension is applied. A long thin plate-like resin cord 102 is attached to the upper and left and right edges of the ground 101, and the edge to which the resin cord 102 is attached is fitted back into the groove 104x so as to be folded back with the resin cord 102. (Patent Document 1). In addition, the lower end of the backrest tension fabric 101 is attached by fixing a bracket 105 attached to the lower end to the rigid horizontal member 106 using a bolt 107.

  In this locking structure of the stretch fabric to the frame, the resin cord 102 fitted in the groove 104x so as to be folded back is hooked on the back frame 103 like a hook by the tension of the stretch fabric, so that the stretch fabric 101 is The frame 103 can be locked. Therefore, the resin cord 102 is sewn at a place where tension is applied to the tension between the two opposing sides and is fitted into the groove 104x. That is, according to the locking structure of the tension fabric to the frame according to the invention described in Patent Document 1, the resin cord 102 sewn on the tension fabric 101 has a corner of the back frame 103 as shown in FIG. It is not provided at the corner of the upholstery 101 corresponding to the part. Then, at the corner of the stretch fabric 101, only the stretch fabric 101 is pushed into the groove 104x using a jig or the like, so that the corner edges of the stretch fabric 101 are stopped.

JP 2007-130341 A

  However, in the tension structure locking structure of Patent Document 1, as shown in FIG. 10, at the corner portion of the tension material 101 corresponding to the corner portion of the back frame 103, only the tension material 101 is grooved using a jig. Since the shape is adjusted by being pushed into 104x, when a force for pulling out the stretch fabric 101 is applied, the stretch fabric 101 may pop out. Although the projecting of the stretched fabric 101 itself does not immediately affect the support strength of the stretched fabric 101, there is a problem that the beauty of the appearance is impaired.

  An object of the present invention is to provide a tensioning structure and a tensioning locking method that do not easily protrude a position corresponding to a corner portion of the tensioned frame.

In order to achieve this object, the invention according to claim 1 is characterized in that the tension is applied to the frame by folding the edge of the tension inward into the outward groove provided in the corner of the chair frame. In the tension structure of the stretched fabric that stretches in a hung state, a groove fitting portion is formed by forming a gather at a position corresponding to the corner portion of the frame of the edge of the stretched fabric and folding it back into a shape corresponding to the bending state of the corner portion. The corner fitting portion is supported by fitting the groove fitting portion, which is formed only by turning back the gathers, into the groove at the corner portion of the frame .

  Further, in the upholstery locking structure according to claim 2, the shape of the groove fitting portion is maintained by sewing.

  Further, according to a third aspect of the present invention, there is provided a structure for locking the tension fabric, wherein a locking plate to be fitted in a groove provided in a linear portion of the frame is sewn on at least one side of the groove fitting portion. The part is reinforced and sewn as it is with a thread that sews the locking plate to the tension.

  According to a tenth aspect of the present invention, the frame is a chair back frame or seat frame.

Further, the invention according to claim 5 is a state in which the tension is applied to the frame in a state where the tension is applied to the frame by folding the edge of the tension inward into the outward groove provided in the corner portion of the chair frame. In the method of locking the stretched fabric to be passed, a gather is formed at a position corresponding to the corner portion of the frame of the stretched fabric to form a groove fitting portion that is folded back into a shape corresponding to the bending state of the corner portion . By fitting a groove fitting portion consisting only of a turn into a groove provided in the corner portion, the corner portion is supported .

  Further, according to the sixth aspect of the present invention, there is provided a method for locking the tension fabric, wherein the groove fitting portion is folded inward by sewing the yarn along the edge of the tension fabric in a flat state and then squeezing the tension fabric while pulling the yarn. To be formed.

  Further, according to a seventh aspect of the present invention, there is provided a method for locking a stretch fabric, wherein after the groove fitting portion is formed, at least one side of the groove fitting portion is sewn with a locking plate that is fitted in the groove provided in the linear portion of the frame. When the locking plate is sewed, the groove fitting portion is directly sewed with a thread for sewing the locking plate.

  According to a tenth aspect of the present invention, the frame is a chair back frame or seat frame.

  According to the first and fifth aspects of the present invention, the groove fitting portion is formed at a position corresponding to the corner portion of the frame at the edge of the stretch, and the groove fitting portion is fitted into the groove of the corner portion of the frame. Even when an external force that hits the edge of the tension fabric is applied to this position, the edge of the tension fabric is more difficult to pull out than when the edge of the tension fabric is pushed into the groove as it is. It can be made difficult to come off the corner. Further, by forming the groove fitting portion in advance, it becomes easy to fit the edge of the stretch fabric into the groove of the corner portion of the frame, and a clean finish state is obtained. Furthermore, it becomes easy to make the insertion amount of the stretch fabric into the groove of the corner portion of the frame constant, and in particular, it is possible to suppress the occurrence of variation by the operator and to make the quality constant.

  Further, according to the second and sixth aspects of the invention, the groove fitting portion can be easily formed by sewing.

  According to the third and seventh aspects of the invention, the groove fitting portion of the locking plate can be easily reinforced.

  Furthermore, according to invention of Claim 4, 8, application to the backrest or seat of a chair is possible.

It is a longitudinal cross-sectional view of the corner part of a frame, showing an example of the embodiment of the upholstery locking structure of the present invention. It is sectional drawing which follows the II-II line of FIG. It is sectional drawing which follows the III-III line of FIG. It is a top view of the state which sewed the thread | yarn to the corner part corresponding position of a tension fabric. It is a perspective view for demonstrating a mode that a groove insertion part is formed in the corner part corresponding position of a tension | tensile_strength. It is a figure for demonstrating a mode that a latching plate is attached to the plate sewing part of a tension fabric. It is a figure for demonstrating a mode that the edge of a fabric is inserted in the corner part of a flame | frame. It is for demonstrating the corner part of a flame | frame, (A) is a front view which shows a rectangular frame, (B) is a front view which shows the part curved so that it may bulge to the outer side of a frame, (C) is a frame It is a front view which shows the part curved so that it might protrude inside. FIG. 2A is a perspective view of a conventional chair tension structure, FIG. 3A is an exploded perspective view centering on a backrest portion, and FIG. It is a bottom view which expands and shows the corner | angular part of a cyclic | annular frame in the latching structure of the conventional chair tension.

  Hereinafter, the configuration of the present invention will be described in detail based on the form shown in the drawings.

  FIGS. 1-7 shows an example of the embodiment of the upholstery locking structure of the present invention. The upholstery locking structure is such that the upholstery 3 is tensioned to the frame 1 by folding the edge 3a of the upholstery 3 inwardly into the outward groove 2 provided in the corner portion 1a of the chair frame 1. It fits in a hung state, and is fitted into a groove 4 formed at a position corresponding to the corner 1a of the frame 1 of the edge 3a of the stretch 3 and folded back into a shape corresponding to the bending of the corner 1a. A part 5 is provided.

  The frame 1 stretches over the chair stretch 3 and includes the frame backup material shown in FIG. 10 in addition to the frame itself. In the present embodiment, the stretch fabric 3 is stretched over a back frame as a backrest frame. That is, the backrest of the chair is formed by stretching the stretch 3 over the frame-shaped frame 1. However, the frame 1 is not limited to the back frame, and may be a seat frame, for example. Alternatively, the frame in the case where an armrest or a headrest is formed by stretching the stretch fabric 3 over a frame-shaped frame may be used.

  A groove 2 is provided on the outer surface 1c of the frame 1, that is, the surface in the direction in which the stretched fabric 3 is widened, and the edge 3a of the stretched fabric 3 is folded and inserted. The groove 2 is formed along the longitudinal direction of the frame 1.

  The frame 1 is provided with a corner portion 1a. Here, the corner portion 1a is, for example, a four-corner portion of a rectangular frame (for example, the corner portion 1a in FIG. 8A), a portion that is curved so as to bulge outward (in the direction in which the stretch 3 is spread) (for example, 8B, a corner portion 1a), a portion curved in such a manner as to protrude inward (the direction opposite to the direction in which the stretch fabric 3 is spread) (for example, the corner portion 1a in FIG. 8C), etc. When 3 is considered as a surface, it means a portion bent in a plane parallel to the surface.

  In the present embodiment, both sides of the corner portion 1a of the frame 1 are straight portions 1b. However, both sides of the corner portion 1a do not necessarily have to be straight portions 1b. For example, the corner portion 1a may be continuous in an S shape, or three or more corner portions 1a may be continuous.

  The frame 1 may be anything that spans the tension fabric 3, and may be, for example, an endless annular (rectangular, elliptical, circular, triangular, polygonal, etc.) frame, for example, a U-shaped, A frame with an end such as a letter shape or a bow shape may be used. In addition, the frame in the case where the stretch fabric 3 is stretched over a single frame (for example, an annular frame, a U-shaped frame, a bow-shaped frame, etc.) or a plurality of frames (for example, a U-shaped frame, a bow) The frame in the case where the stretched fabric 3 is stretched by combining a shape frame, a square-shaped frame, an I-shaped frame, or the like may be used.

  The upholstery 3 is cut in advance in a shape corresponding to the shape of the frame 1 (see FIG. 4). A groove fitting portion 5 is provided at a position 3b (hereinafter referred to as a corner portion corresponding position) 3b corresponding to the corner portion 1a of the frame 1 of the edge 3a of the upholstery 3. The shape of the groove fitting portion 5 is maintained by sewing, for example, and is fitted into the groove 2 provided in the corner portion 1 a of the frame 1.

  The material of the upholstery 3 is limited to a specific material as long as it is a material that can exhibit appropriate elasticity and tension as a backrest in a state of being stretched over the frame 1 (in other words, an elastic material). For example, polyester mesh sheets, various resin films, fabrics, nonwoven fabrics, and the like are used.

  At least one side of the groove fitting portion 5 of the upholstery 3 is sewn with a locking plate (cord) 6 fitted into the groove 2 provided in the linear portion 1 b of the frame 1. In the present embodiment, locking plates 6 are sewn on both sides of the groove fitting portion 5. The locking plate 6 is sewn to the surface that becomes the inner side when the edge 3a of the tension fabric 3 is folded back. However, the surface on which the locking plate 6 is sewn is not limited to the inner side surface when folded, but may be sewn on the outer side surface.

  In this embodiment, the groove fitting portion 5 is reinforced and sewn as it is by the thread 7 for sewing the locking plate 6 to the tension fabric 3. Sewing is performed using, for example, a sewing machine. However, it is not necessarily limited to the case where sewing is performed using a sewing machine, and sewing may be performed by hand sewing or the like.

  The locking plate 6 has flexibility and is made of, for example, resin. The width of the locking plate 6 is slightly shorter than the depth of the groove 2. In addition, the width of the locking plate 6 is a dimension that does not come out of the groove 2 due to the tension of the tension fabric 3.

  Next, the locking method of the tension fabric 3 of the present invention will be described. The tension 3 can be locked by tensioning the tension 3 to the frame 1 by folding the edge 3a of the tension 3 inwardly into the outward groove 2 provided in the corner 1a of the chair frame 1. The gather 4 is formed at the corner corresponding position 3b of the stretch 3 to form the groove fitting portion 5 folded back into a shape corresponding to the bending state of the corner 1a. The groove fitting portion 5 is fitted into the groove 2 provided in the corner portion 1a.

  The formation of the groove fitting portion 5 will be described. With respect to the tension fabric 3 that has been cut in advance according to the shape of the frame 1, at least the corner portion corresponding position 3b is spread in a flat shape, and the thread 8 is sewn along the edge 3a (FIG. 4). In this embodiment, sewing is performed using a sewing machine. One end of the sewing thread 8 (the upper thread 8a and the lower thread 8b of the sewing thread) is fixedly sewn so that the upper thread 8a and the lower thread 8b do not come off. In addition, the other end is extended by a length that is easy to work. In FIG. 4, the phantom line indicated by reference numeral 9 indicates the folding position of the edge 3a.

  Next, the tension fabric 3 is squeezed while pulling the other end of either the upper thread 8a or the lower thread 8b (FIG. 5). Thereby, the gather 4 is formed. Then, after preventing the gather 4 from extending by connecting the other ends of the upper thread 8a and the lower thread 8b, the shape of the gather 4 is folded inward to adjust the shape, thereby corresponding to the bending state of the corner portion 1a. A groove fitting portion 5 having a shape is formed (FIG. 6).

  After forming the groove fitting part 5, the locking plate 6 is sewn on both sides of the groove fitting part 5 (FIG. 6). In this embodiment, the locking plate 6 is sewn using a sewing machine. A portion (hereinafter referred to as a plate sewing portion) 3c for sewing the locking plate 6 of the edge 3a of the stretched fabric 3 is slightly folded inward by forming the groove fitting portion 5, so that the locking plate 6 can be moved while turning this portion. Sew. In the present embodiment, the locking plate 6 is sewn to the inner side surface of the plate sewing portion 3c, but the locking plate 6 may be sewn to the outer side surface. Further, in this embodiment, the sewing operation is performed from the inside while the plate sewing portion 3c is being rolled, but the sewing operation may be performed from the outside.

  Further, when the locking plate 6 is sewed, the groove fitting portion 5 is reinforced and stitched as it is with the thread 7 for sewing the locking plate 6. In this embodiment, since the locking plate 6 is sewn using a sewing machine, one locking plate 6 is sewn starting from the end far from the groove fitting portion 5 and then being folded inward. The groove fitting portion 5 is continuously sewed while the groove fitting portion 5 is being rolled, and the other locking plate 6 is continuously sewed as it is. The groove fitting portion 5 can be sewn more firmly by reinforcing and sewing the groove fitting portion 5.

  Next, the stretch fabric 3 is stretched over the frame 1 (FIG. 7). If necessary, the groove fitting portion 5 is fitted into the groove 2 of the corner portion 1a of the frame 1 while applying tension to the tension fabric 3, and then the locking plate 6 on both sides and the plate sewing portion 3c of the tension fabric 3 are connected to the frame 1 of the frame 1. It fits into the groove 2 of the straight part 1b. Then, if necessary, the groove fitting portion 5, the plate sewing portion 3 c, and the locking plate 6 of the tension fabric 3 are finely reciprocated in the length direction of the groove 2 to fit firmly, and the appearance of the tension fabric 3 is further adjusted. .

  In addition, when the some corner part 1a is provided in the flame | frame 1, the groove insertion part 5 corresponding to each corner part 1a is formed, each groove insertion part 5, each plate sewing part 3c, and each engagement. The stop plate 6 is fitted into the corresponding part of the groove 2, and the tension fabric 3 is stretched over the frame 1.

  Then, the stretch 3 is stretched over the frame 1 by fitting all the portions of the edge 3 a of the stretch 3 to be fitted into the groove 2 of the frame 1. The edge 3 a of the stretch fabric 3 such as the groove fitting portion 5 and the locking plate 6 are caught like a hook by the tension of the stretch fabric 3, and the stretch fabric 3 can be locked to the frame 1. The edge 3a of the tension fabric 3 is deeply fitted into the groove 2 so as not to be pulled out by the tension of the tension fabric 3, and the thickness of the groove fitting portion 5, the thickness of the plate sewing portion 3c and the locking plate 6, and the groove 2 Since the tensioned fabric 3 is set so as not to come off due to the tension, and the groove fitting portion 5 and the locking plate 6 have a rigidity that does not come off due to the tension of the tensioned fabric 3, The upholstery 3 is tightly stretched over the frame 1.

  In the present invention, the groove fitting portion 5 is formed at the corner portion corresponding position 3b of the stretch fabric 3 and the groove fit portion 5 is fitted into the groove 2 of the corner portion 1a. Is easy to stretch. For example, the groove fitting portion 5 can be easily fitted into the groove 2 without using a jig or the like. Therefore, workability can be improved.

  Further, by forming the groove fitting portion 5 at the corner portion corresponding position 3b of the stretch fabric 3, it becomes difficult to remove this portion from the groove 2, and the stretch fabric 3 is detached from the corner portion 1a of the frame 1 by using a chair. Can be prevented. Needless to say, the stretch 3 can be prevented from coming off from the straight portion 1 b of the frame 1.

  Further, by forming the groove fitting portion 5 at the corner portion corresponding position 3b of the stretched fabric 3 and fitting the groove fitting portion 5 into the groove 2, the finish of this portion can be cleaned.

  Further, by forming the groove fitting portion 5 at the corner portion corresponding position 3b of the tension fabric 3 and fitting the groove fitting portion 5 into the groove 2, the amount of insertion of the tension fabric 3 into the groove 2 is made constant. In particular, it is possible to suppress the occurrence of variation by the operator and to make the quality constant.

  Furthermore, since the groove 8 can be formed by pulling the edge 3a of the tension 3 with the thread 8 sewed at the corner portion corresponding position 3b of the tension 3, the groove insertion 5 is easily formed. From this point, workability is also excellent.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention.

  For example, in the above description, the shape of the groove fitting portion 5 is maintained by sewing, that is, the gathers 4 are not broken. However, it is not always necessary to maintain the shape by sewing, for example, an adhesive is used. The shape may be maintained by adhesion, locking with a locking tool, or the like.

  In the above description, the locking plates 6 are sewn on both sides of the groove fitting portion 5 of the tension fabric 3 so as to be fitted into the grooves 2 together with the edges 3a of the tension fabric 3. For example, when the rigidity of the edge 3a of the tension fabric 3 is large, the locking plate 6 may be omitted and only the edge 3a of the tension fabric 3 may be fitted into the groove 2. Further, it is not necessary to sew the locking plate 6 on both sides of the groove fitting portion 5, and the locking plate 6 may be sewed only on one side. In these cases, the work becomes simpler.

  In the above description, the locking plate 6 is sewn to the edge 3a of the tension fabric 3. However, the means for attaching the locking plate 6 to the tension fabric 3 is not limited to sewing. You may make it attach using a fastener or a locking tool.

  Further, in the above description, the groove fitting portion 5 is reinforced and sewn as it is with the thread 7 for sewing the locking plate 6 to the tension fabric 3, but a thread different from the thread 7 for sewing the locking plate 6 is used. Then, the groove fitting portion 5 may be reinforced and sewed, or when the reinforcing sewing is unnecessary, the groove fitting portion 5 may not be reinforced. If reinforcement sewing is not performed, the operation becomes easier.

  In the above description, the groove fitting portion 5 is sewn using one set of the threads 8 (upper thread 8a and lower thread 8b), but it is not always necessary to use the upper thread 8a and the lower thread 8b. The groove fitting portion 5 may be sewn with a single thread 8. Also in this case, the groove fitting portion 5 can be formed by pulling the yarn 8 and narrowing the edge 3 a of the tensioned ground 3.

  In the above description, the groove fitting portion 5 is fitted into the groove 2 and then the side locking plate 6 and the plate sewing portion 3c are fitted into the groove 2, but the order is not necessarily limited to this. Alternatively, the locking plate 6 and the plate sewing portion 3 c may be fitted into the groove 2 and then the groove fitting portion 5 may be fitted into the groove 2.

  Further, for example, when the stretch fabric 3 is bridged over the rectangular annular frame 1, groove fitting portions 5 are formed in portions corresponding to the four corners of the frame 1 of the stretch fabric 3, and two adjacent two frames are formed. After fitting the groove fitting portion 5 corresponding to the corner into the groove 2 of the corner portion 1a of the frame 1, the locking plate 6 and the plate sewing portion 3c between them are fitted into the groove 2 of the linear portion 1b of the frame 1. It may be included. In this case, since the both sides are already fitted when fitting the stretch fabric 3 into the straight portion 1b of the frame 1, it is easy to fit the stretch fabric 3 into the straight portion 1b of the frame 1.

DESCRIPTION OF SYMBOLS 1 Frame 1a Corner part 1b Straight line part 2 Groove 3 Tension ground 3a Edge 3b Corner part corresponding position 4 Gather 5 Groove insertion part 6 Locking plate 7 Thread which sews the locking plate to the tension

Claims (8)

In the tension structure locking structure that stretches the tension fabric in a tensioned state by folding the edge of the tension fabric inwardly in an outward groove provided in a corner portion of the chair frame. And a groove fitting portion formed by forming a gather at a position corresponding to a corner portion of the frame at the edge of the upholstery and folding back into a shape corresponding to the bending state of the corner portion, and comprising only the folding back of the gather A tension- holding structure for supporting a corner of the corner portion by fitting a groove-fitting portion into the groove of the corner portion of the frame . 2. The upholstery locking structure according to claim 1, wherein the groove fitting portion is maintained in shape by sewing. At least one side of the groove fitting portion is sewn with a locking plate fitted into the groove provided in the linear portion of the frame, and the groove fitting portion uses the locking plate as the tensioning fabric. 2. The upholstery locking structure according to claim 1, wherein the sewed thread is reinforced and sewn as it is. The tension structure according to claim 1, wherein the frame is a back frame or a seat frame of a chair. In a method of locking a tension fabric that stretches the tension fabric in a tensioned state by folding the edge of the tension fabric inwardly into an outward groove provided in a corner portion of a chair frame, Forming a groove at a position corresponding to a corner portion of the frame on the edge of the stretched fabric to form a groove fitting portion folded back into a shape corresponding to the bending state of the corner portion, and comprising only folding back of the gather A method for locking a tensioned fabric, wherein the tensioned portion of the corner portion is supported by fitting a groove fitting portion into the groove provided in the corner portion . The groove fitting portion is formed by sewing a thread along the edge of the tensioned fabric in a flat state and then folding back the tensioned fabric while pulling the yarn to fold inside. Item 6. The method of locking the tension fabric according to item 5. After forming the groove fitting portion, at least one side of the groove fitting portion is sewn with a locking plate fitted into the groove provided in the linear portion of the frame, and the locking plate is 6. The method of locking a tension fabric according to claim 5, wherein when the sewing is carried out, the groove fitting portion is reinforced and stitched as it is with a thread for sewing the locking plate. The method for locking a stretch fabric according to claim 5, wherein the frame is a back frame or a seat frame of a chair.

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