JP2010094451A - Tear preventing structure of covering fabric for chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a tear of a covering fabric by reducing damage given to the covering fabric put on a frame or inner shell of a chair seat or the like by the collision of an outside object in a service condition. <P>SOLUTION: A tear preventing structure has a cushioning member mounting part 2a which is a recess formed at an outside object colliding portion, and a cushioning member formed of an elastic material and fitted into the cushioning member mounting part 2a in the service condition of a chair out of the edge part of a backrest inner shell 3a of a backrest of the chair covered with the covering fabric. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a structure for preventing tearing of a chair upholstery. More specifically, the present invention relates to a structure for preventing a chair seat, a backrest, or a tear of a tension covering a headrest surface.

  As shown in FIG. 8, as a stretched structure for covering a chair seat or the backrest surface, a tension is applied and the seat 103 and the frame 101 of the backrest 104 are provided as shown in FIG. There is one in which the periphery of the net member 102 covering the front surface and covering the frame 101 is wound around the frame 101 and attached (Patent Document 1).

JP 2006-110001 A

  However, in the stretch structure of the stretch fabric of Patent Document 1, the stretch fabric is covered with a hard frame having sufficient strength as a chair seat or a backrest frame. When hitting, a large amount of damage is done to the stretched area that is sandwiched between the external object and the frame. Therefore, when the chair is in use, the edge of the seat hits the foot / post of the desk many times, and the edge of the backrest hits the edge of the top of the desk, for example, repeatedly. Then fraying and tearing will occur. In addition, when covering a chair seat or the like, the tension is applied to the tension as in the tensioning structure of Patent Document 1, so fraying or tearing occurs from a point where the strength has fallen even slightly due to slight damage. Then it spreads rapidly.

  Accordingly, the present invention provides a chair capable of reducing damage to a tensioned fabric covered by a frame such as a chair seat or an inner shell by hitting an external object in use and preventing the tearing of the tensioned fabric. An object of the present invention is to provide a structure for preventing tearing of the fabric.

  In order to achieve this object, the structure for preventing tearing of a chair stretch according to claim 1 is an external object in the use state of the chair, the backrest, or the edge of the inner shell of the headrest covered with the stretch. And a shock-absorbing member mounting portion that is a recess formed in a portion that hits, and a shock-absorbing member that is made of an elastic material and is fitted into the shock-absorbing member mounting portion.

  Therefore, according to the structure for preventing tearing of the tension of the chair, even if it is a structure in which the tension is directly covered on the inner shell, that is, a structure in which no cushion material is interposed between the inner shell and the tension, For example, when the chair is in use, a cushioning member made of an elastic material is fitted to a part that strikes against an external object such as a table top or a leg of the desk. (Specifically, dents) absorb the impact and reduce the damage to the stretched material sandwiched between the outer object and the inner shell.

  According to a second aspect of the present invention, in the structure for preventing breakage of the chair stretch according to the first aspect, the depth of the recess of the buffer member mounting portion and the thickness of the buffer member are both 2 mm. In this case, since the buffer member is made to have an appropriate thickness, the impact when the external object strikes is adequately absorbed, and the external object does not dent excessively when it strikes. .

  According to the structure for preventing the tear of the chair according to claim 1, when the external object hits, the cushioning member is deformed and absorbs the impact, so that the tension is sandwiched between the external object and the inner shell. Since the damage given can be reduced, it is possible to prevent the tearing of the tension and improve the durability of the chair and to continue the comfortable use for a long time. In addition, according to the structure for preventing tearing of the tension of the chair according to claim 1, the edge of the frame or the inner shell must be rounded, for example, to reduce damage to the tension due to the collision of an external object. Since there is no restriction that the shape of the frame or inner shell must be adopted, the diversity of chair designs can be ensured.

  Furthermore, according to the structure for preventing tearing of the tensioned area of the chair according to claim 2, it is possible to appropriately absorb the impact when an external object hits, so that the damage given to the tensioned area can be more effectively reduced. This can prevent tearing. In addition, when the external object hits, it does not dent excessively, so that the stretched area of the part where the external object hits can be prevented from being deformed and stretched and loosened, and the tensioned area is excessive. Tensions and damage can be prevented. Therefore, it becomes possible to prevent the damage of the stretch fabric and improve the durability of the chair, and to continue the comfortable use for a long time.

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

  FIG. 1 to FIG. 5 show an example of an embodiment of the structure for preventing tearing of a tensioned fabric of a chair according to the present invention. In the present embodiment, an example in which the structure for preventing tearing of the chair tension according to the present invention is applied to the backrest 3 of the chair 1 whose overall structure is shown in FIG. 5 will be described.

  The chair 1 of the present embodiment includes a leg 5 having casters, a base (stored inside the seat shell 6) that is attached to and supported by the upper end of the leg column 5a of the leg 5, and is disposed at the rear of the base. A backrest 3 having a lower end connected to be tiltable with respect to the base 3 and a seat 4 disposed above the base and connected to the base are provided. Here, in this specification, up and down, front and rear, and left and right are defined based on a seated person sitting on the seat 4.

  And the backrest 3 has the backrest inner shell 3a as an edge frame, and the tension | tensile_strength 3b which covers the surface of this backrest inner shell 3a and is covered with the backrest inner shell 3a.

  The backrest inner shell 3a is formed in a square frame shape in plan view by a hard material having sufficient strength as an inner shell for the backrest of a chair. The inner shell to which the structure for preventing tearing of the chair of the present invention is applied is a specific type of inner shell as long as it is an inner shell that is usually used in a configuration having a frame or inner shell and a tensioned fabric that covers the inner shell. The inner shell is not limited to a shell or a specific material.

  In addition, the stretch fabric 3b to be applied to the components of the chair to which the present invention is applied is a specific type of stretch fabric as long as it is a stretch fabric that is normally used in a configuration having a frame or an inner shell and a stretch fabric to be covered therewith. -It is not limited to the stretched area formed with a specific material. Specifically, for example, the present invention can be applied to a component part of a chair covered with upholstery such as mesh / net cloth or cloth, synthetic leather, leather formed of various materials.

  The structure 2 for preventing the tearing of the stretched fabric of the chair according to the present embodiment is configured to collide with an external object in the use state of the chair 1 out of the edge of the backrest inner shell 3a of the backrest 3 of the chair 1 covered with the stretched fabric 3b. It has the buffer member attaching part 2a which is a dent formed in the contact part, and the buffer member 2b which consists of an elastic material, and is fitted by the buffer member attaching part 2a.

  The upholstery tear preventing structure of the present invention is provided at a portion of the seat 4 of the chair 1, the backrest 3 or the edge of the headrest that collides with an external object such as a table top. In the present embodiment, the upholstery tear prevention structure 2 is provided over a range in which the top plate of the desk may hit in the use state of the chair 1 in the left and right edges of the backrest inner shell 3a. ing.

  In the present embodiment, the cushioning member mounting portion 2a is a dent provided across the front surface, the outer side surface, and the rear surface of the left and right edges of the backrest inner shell 3a.

  In the present embodiment, the cushioning member 2b is wound around the cushioning member mounting portion 2a, that is, the front surface, the outer side surface, and the rear surface of the left and right edges of the backrest inner shell 3a provided with the cushioning member mounting portion 2a. It is attached with an adhesive so that it can be wound around.

  The buffer member 2b is formed of a material that is softer and more elastic than at least the backrest inner shell 3a. In other words, when the backrest inner shell 3a formed of a relatively hard material collides with an external object such as a table top, for example, the outer fabric 3b is sandwiched between the outer shell 3a and the outer fabric 3b to prevent damage to the outer fabric 3b. When an object hits, it is deformed (specifically, recessed), and is formed of a material having elasticity that can alleviate the impact of an external object collision received by the stretch 3b. Specifically, for example, it is formed of felt, urethane, elastic rubber, or the like.

  The thickness of the buffer member 2b is a thickness that can appropriately absorb the impact when the external object strikes, and the thickness that does not excessively deform when the external object strikes. Adjusted to In other words, if the shock cannot be sufficiently absorbed, the tension material sandwiched between the outer object and the inner shell will be damaged. Therefore, in order to prevent these, the thickness of the buffer member 2b is appropriately adjusted while considering the material of the buffer member 2b.

  Here, it is preferable that the depth of the recess of the buffer member mounting portion 2a and the thickness of the buffer member 2b are the same or substantially the same. As a result, the outer peripheral surface of the backrest inner shell 3a and the outer peripheral surface of the cushioning member 2b around the upholstery tear preventing structure 2 form a flat or almost flat surface without unevenness, and the upholstery 3b is covered. Since there is no extra unevenness in the case, the appearance is not harmed, and it is possible to prevent the nail 3b from being damaged due to, for example, a nail being caught by the unevenness or rubbing the uneven portion. When 2b is affixed to the buffer member mounting portion 2a, the buffer member 2b can be prevented from peeling off.

  Furthermore, in this embodiment, the inclined part 2c is provided in order to eliminate the level | step difference by the unevenness | corrugation of the up-and-down part of the buffer member attaching part 2a of the backrest inner shell 3a being cut off by the dent of the buffer member attaching part 2a. .

  According to the structure for preventing breakage of the tensioned fabric of the chair of the present invention configured as described above, the buffer member 2b is interposed between the tensioned fabric 3b and the inner shell 3a where the external object hits. Therefore, when an external object hits, the buffer member 2b absorbs an impact and can reduce the damage given to the tension | tensile_strength 3b pinched by an external object and the inner shell 3a.

  In addition, although the above-mentioned form is an example of the suitable form of this invention, it is not limited to this, In the range which does not deviate from the summary of this invention, various deformation | transformation implementation is possible. For example, in the present embodiment, the chair 1 whose overall structure is shown in FIG. 5 has been described as an example. However, the chair to which the structure for preventing the tearing of the chair of the present invention can be applied is not limited to the chair 1. Absent. Specifically, for example, a fixed chair without a caster on the leg may be used, or a chair without a backrest may be used. Further, the shape of the back shell inner shell to which the present invention can be applied is not limited to the shape of a square in a side view like the back shell inner shell 3a of the chair 1 of the present embodiment. However, the present invention can be applied.

  In this embodiment, the structure for preventing the tear of the chair of the present invention is provided on the backrest 3, but the structure for preventing the tear of the chair of the present invention can be applied to the backrest. It is not limited, and may be applied to a seat or may be applied to a headrest. In addition, when applying the structure for preventing the tearing of the chair of the present invention to the seat, a range in which an external object such as a leg or a column of a desk may collide with the chair in a usage state, specifically, For example, it can be considered to be provided at the front edge of the seat, the front left and right corners, and the left and right edges. In addition, when applied to a headrest, it may be possible to provide a range in which outside objects such as surrounding equipment may hit in the use state of the chair, specifically, for example, at the left and right edges of the headrest. .

  In addition, when the structure for preventing tearing of a chair according to the present invention is applied to the backrest, the position where the structure is provided is not limited to the range shown in FIG. It may be a wide range or a narrower range. In addition, when the structure of the present invention is applied to the backrest, the range in which the structure can be provided is a range at least above the seating surface of the left and right edges of the backrest. The range that can be provided is the range from the left and right edges excluding the rear surface of the seat to the front edge.

  In the present embodiment, the buffer member 2b is configured to be wound around the buffer member mounting portion 2a and attached to the backrest inner shell 3a. However, the present invention is not limited to this. It is also possible to adopt a configuration in which the buffer member 2b is pasted on the back surface of the stretched fabric 3b that covers the shell 3a. Also in this case, when the buffer member 2b is attached to the position of the buffer member mounting portion 2a when the back cover inner shell 3a is covered with the back cover inner shell 3a and the tension member 3b is covered. By allowing the buffer member 2b to fit in the recess of the buffer member mounting portion 2a, the outer peripheral surface of the backrest inner shell 3a and the outer peripheral surface of the buffer member 2b can be made flat or substantially flat and external The same effect as in the case of the configuration of the embodiment can be obtained against the collision.

  In the present embodiment, the inclined portion 2c is provided in order to eliminate a step caused by the unevenness of the upper and lower portions of the cushioning member mounting portion 2a of the backrest inner shell 3a being cut off by the depression of the cushioning member mounting portion 2a. However, the provision of the inclined portion 2c is not an essential component of the present invention, and the present invention can achieve the required effects even without the inclined portion 2c.

  It verified about the suitable thickness of the buffer member in the tear prevention structure of the tension fabric of the chair of this invention.

  The results shown in Table 1 were obtained by performing verification for each thickness of the buffer member.

  From this result, it was confirmed that the thickness of the buffer member is preferably in the range of 1.0 to 3.0 mm, more preferably in the range of 1.5 to 2.5 mm, and most preferably 2.0 mm. When the thickness of the buffer member 2b is made larger than 2.5 mm, the deformation of the tension due to the collision of an external object becomes large, and the back shell inner shell 3a itself is made to be equivalent to the thickness of the buffer member. There is a risk that the strength of the inner shell may be reduced due to cutting, and the thickness of the buffer member is preferably within the above-mentioned range also in this respect.

  Next, an example of the performance evaluation test of the structure for preventing the tearing of the chair stretch according to the present invention will be described with reference to FIGS.

  In this example, the test was performed by applying the structure for preventing the tear of the chair according to the present invention to the backrest of the chair.

  In this example, as a performance evaluation test, a chair having a structure equivalent to that shown in FIG. 5 was used. The left and right edges of the backrest were repeatedly collided with the periphery of the top board, and the degree of damage to the backrest tension as the number of collisions increased was observed.

  A felt having a thickness of 2 mm was used as a buffer member. In addition, a buffer member (that is, felt) having an actual length of 241 mm was attached in the range of 518 to 740 mm from the floor surface in the vertical dimension among the left and right edges of the back of the chair. In addition, 100% polyester / double jersey knitted fabric was used for the backrest.

  Moreover, in order to compare with the case where it has the structure which prevents the tear of the chair of the present invention, the same test was performed for the backrest of the chair without the structure of the present invention.

  And in order to evaluate durability performance, while observing the extent of the damage of the tension place of the collision part while repeating the collision with the top plate of the desk, the tension place when the structure of the present invention is not provided is shown in FIG. The result was obtained, and the result shown in FIG. 7 was obtained for the upholstery with the structure of the present invention.

  As shown in FIG. 6, the stretched fabric without the structure of the present invention starts to appear in the stretched fabric when the number of collisions is 200 (the position indicated by ○ in the figure), and the stretched fabric begins to break after 800 times. After that, the breakage gradually increased as the number of collisions increased, and progressed to a level that could already be recognized as a complete hole at 2000 times, and the holes gradually increased as the number of collisions increased.

  On the other hand, as shown in FIG. 7, the upholstery in the case where the chair upholstery structure of the chair of the present invention is provided is hardly damaged until the number of collisions of 2000, and there is no sign of tearing at 3500 times. It began to appear (position indicated by ○ in the figure). However, the degree of damage did not progress until the number of collisions of 7000, and a small break was finally recognizable at 10,000 times.

  From these results, it was confirmed that the structure for preventing breakage of the tensioned fabric of the chair of the present invention is very effective in reducing damage of the tensioned fabric due to collision with an external object and preventing tearing.

It is a figure which shows an example of embodiment of the tear prevention structure of the tension fabric of the chair of this invention, and is a top view of the inner shell which has not attached the buffer member among the said structures. It is a figure which shows an example of embodiment of the tearing prevention structure of the tension fabric of the chair of this invention, and is a side view of the inner shell which has not attached the buffer member among the said structures. It is a figure which shows an example of embodiment of the tear prevention structure of the tension fabric of the chair of this invention, and is a top view of the inner shell provided with the said structure. It is a figure which shows an example of embodiment of the tear prevention structure of the tension fabric of the chair of this invention, and is a side view of the inner shell provided with the said structure. It is a side view which shows the whole structure of the chair for demonstrating an example of embodiment of the tear prevention structure of the tension fabric of the chair of this invention. It is a figure which shows the result of the progress of the tension | tensile_strength damage when not providing the structure of this invention of Example 1. FIG. It is a figure which shows the result of the progress of damage of the tension | tensile_strength in the case of providing the structure of this invention of Example 1. FIG. It is a perspective view which shows the tension structure of the conventional tension fabric.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Chair 2 Chair tension prevention structure 2a Buffer member attachment part 2b Buffer member 3 Backrest 3a Backrest inner shell 3b Upholstery 4 Seat

Claims (2)

  A cushioning member mounting portion that is a recess formed in a portion of the chair seat, backrest, or inner shell of the headrest covered with a tensioned fabric, which strikes against an external object in the use state of the chair, and an elastic material. A structure for preventing tearing of a stretch of a chair, comprising: a cushioning member fitted to the cushioning member mounting portion.   The structure for preventing tearing of a tensioned fabric of a chair according to claim 1, wherein both the depth of the recess of the buffer member mounting portion and the thickness of the buffer member are 2 mm.