JP2009082527A - Tension member of furniture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chair which includes a tension material constituting a support surface for supporting the body of a sitting person and a frame across which the tension material is hung, the chair capable of finely adjusting the tension of the tension material by simple configuration. <P>SOLUTION: The tension member 12 constituting a backrest surface S to be the support surface for supporting the body of a sitting person of the backrest 1 of the chair C includes a first tension material element 121, a second tension material element 121 which has an elastic modulus larger than that of the first tension material element 121 and which is piled up behind the first tension material element 121, and a bag part 123 formed between the first tension material element 121 and the second tension material element 122 for housing fluid. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a backrest of a chair including a tension member that constitutes a support surface that supports the body of a seated person, and a frame on which the tension member is installed.

Conventionally, it has been considered that a tension member that constitutes a support surface that supports the body of a seated person is formed of an elastic member, and that a configuration in which the tension member is installed on a frame is employed for the backrest or seat of the chair. ing. In such a chair, a cushioning feeling is given to the seated person by the elasticity of the upholstery material itself (see, for example, Patent Document 1).
Japanese Patent Application No. 2006-011727

  Thus, in furniture such as chairs using such a tension material, not only the cushion feeling due to the elasticity of the tension material itself, but also the cushion feeling similar to a chair provided with a urethane cushion member or air cushion inside the tension material. There is a desire to give Further, in such a chair, there is a demand for improving the sitting comfort by making the shape of the support surface such as the backrest and the seating surface correspond to the shape of the back surface of the seated person.

  The present invention is configured to solve the problems described above.

  In other words, the furniture tension member according to the present invention constitutes a support surface that supports the body of the seated person, and has a lower stretch rate than the first tension element and the first tension element. A second tension element superposed on the back of the first tension element, and a bag portion for containing a fluid formed between the first tension element and the second tension element. It is characterized by doing.

  If it is such, since the fluid is accommodated in the bag portion, the bag portion can be deformed by the load of the seated person, and the first tension member element having the support surface can be deformed following it. is there. Therefore, cushioning properties can be imparted to the support surface using this tension member. In addition, if such a bag portion is formed at a location where the support surface should protrude in accordance with the shape of the portion that contacts the support surface of the seated person, such as the back surface of the seated person, the main shell can be used without using a rigid shell. Even when the upholstery is used, the shape of the support surface can be made to correspond to the shape of the back surface of the seated person to meet the demand for improving the sitting comfort.

  As an aspect for changing the cushioning property for each part of such a tension member, the bag includes a plurality of the bag portions, and the first tension member element and the portion to be the outer edge of each bag portion and What has joined each said 2nd tension | tensile_strength element and formed each bag part is mentioned. If it is such, since the said 1st tension | tensile_strength element and the said 2nd tension | tensile_strength element are joined in the part which should become the outer edge of each bag part, one bag part is by a seated person's load. This is because deformation does not affect the shape of the other bag portion outside the joint portion of the outer edge of the bag portion.

  As an example of an aspect for improving the sitting comfort, the plurality of bag portions communicate with each other, and when one of the bag portions contracts due to an external force received from the support surface, the other bag portions expand. What you are trying to do. In such a case, when there is a portion where the load is large due to weight deviation and a portion where the weight is small, the shape of the support surface changes according to the weight and fits the seated person.

  In particular, if the communication portion between the plurality of bag portions is provided with a control valve capable of regulating the flow of fluid, the control valve is closed when the preferred support surface shape is obtained, and the support surface shape Can be fixed in a desired shape.

  Furthermore, as a structure for suitably providing a furniture tension member with a cushioning property, an air bag that is filled with a gas such as air and is deformed under a load is inserted into the bag portion. Or what comprises the said bag part as an airbag which fills gas, such as air, and can receive a load and can deform | transform.

  As a configuration for changing the cushioning property of such a tension member, an airbag inserted into the bag portion or a bag body configured as the airbag can be contracted and inflated by receiving inflow and outflow of gas. Things.

  And, if there is an external shape recovery means that can recover the shape of the bag part before receiving the external force when the state of receiving the external force from the support surface is eliminated in the bag part, the state that does not receive the external force By setting the shape of the bag portion to a shape that fits a seated person having an average physique, it is possible to accommodate more seated persons.

  According to the configuration of the tension member according to the present invention, the bag portion is formed between the first tension member element and the second tension member element, and the fluid is accommodated in the bag portion. The bag portion can be deformed by the load, and the first upholstery element having the support surface can follow and be deformed. Therefore, cushioning properties can be imparted to the support surface using this tension member. In addition, if such a bag portion is formed at a location where the support surface should protrude in accordance with the shape of the portion that contacts the support surface of the seated person, such as the back surface of the seated person, the main shell can be used without using a rigid shell. Even when the upholstery is used, the shape of the support surface can be made to correspond to the shape of the back surface of the seated person to meet the demand for improving the sitting comfort.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the chair C of the present embodiment is provided with a leg 4, a base 2 supported by the leg 4, a seat 3 disposed on the base 2, and a base 2 standing up. A backrest 1 and a headrest 5 provided above the backrest 1 are provided.

  More specifically, the leg 4 includes a leg blade 41 on which a plurality of casters are mounted, and a leg column 42 that rises substantially vertically from the center of the leg blade 41. The leg blade 41, the leg column 42, The leg struts 42 can be projected and retracted vertically by extending and contracting a gas spring (not shown) interposed therebetween.

  The base body 2 is fixed to the upper end of the leg column 42, and the height positions of the seat 3 and the backrest 1 can be adjusted through the operation of projecting and retracting the leg column 42.

  The seat 3 is formed by mounting a cushion body 32 that forms a seating surface on a seat receiver 31. The seat 3 is supported so as to be slidable in the front-rear direction with respect to the base 2 and is attached to the following back frame 11 via a shaft (not shown).

  The backrest 1 is provided with a tension member 12 that forms a backrest surface S on the front surface of the back frame 11 as shown in FIG. 1 and as shown in FIGS. Is. In this embodiment, the back frame 11 is provided in a pair of left and right upright rearwardly from the base 2. The back frame 11 is provided so as to extend further upward beyond the upper end of the backrest 1, more precisely, the upper end of the tension member 12. The upper and lower ends of the left and right back frames 11 are connected via a horizontal member 13.

  The headrest 5 includes a headrest frame 51 provided extending from the upper end of the back frame 11 and a headrest body 52 provided in front of the headrest frame 51.

  Therefore, in the present embodiment, as shown in FIGS. 2 and 3, the tension member 12 of the backrest 1 has a first stretch material element 121 and a lower expansion rate than the first stretch material element 121. A second tensioner element 122 polymerized on the back of the first tensioner element 121 and a bag containing a fluid formed between the first tensioner element 121 and the second tensioner element 122 Part 123.

  The first upholstery element 121 is a fabric formed by knit knitting using, for example, a highly elastic yarn such as a polyurethane yarn, and has both strength and cushioning properties.

  The second upholstery element 122 is, for example, a double raschel mesh made of synthetic fiber and further knitted with elastic yarn such as an elastomer yarn (specifically, a double raschel is formed of a stretchable and deformable mesh fabric top and back fabric, respectively). It is stitched in three dimensions by knitting) and has both strength and cushioning properties. The expansion / contraction rate is lower than that of the first tension member 121, and specifically, the elastic coefficient is larger than that of the first tension member 121.

  In this embodiment, the bag portion 123 is formed between the upper half portion of the first tension member 121 and the upper half portion of the second tension member 122, and the lower half portion of the first tension member 121. They are respectively provided between the lower half portions of the second tension member 122.

  More specifically, the bag portion 123 is provided with a joint portion 123a at a portion to be an outer edge of the bag portion 123, and the first tension member element 121 and the second tension member element 122 at the joint portion 123a. Are joined by a method such as stitching. In addition, an air bag 124 that is filled with a gas such as air and that can be deformed under a load is inserted into the bag portion 123.

  The effect | action at the time of making the shape of the backrest 1 respond | correspond to the shape of a back surface of a seated person in the chair comprised in this way is shown below. First, the airbag 124 is deformed by changing the amount of gas in the airbag 124 in the upper half or the lower half. Then, the first tension member 121 having a smaller elastic modulus is deformed in preference to the second tension member 122. That is, the surface shape of the backrest surface S of the backrest 1 is deformed. By sequentially adjusting the amount of gas in the airbag 124 for the airbags 124 in the upper half and the lower half, the surface shape of the backrest surface S can be made to correspond to the shape of the back surface.

  In the present embodiment, the shape of the airbag 124 is set to a shape that fits a seated person having an average physique in a state where no external force is applied so as to correspond to a larger number of seated persons. When the state of receiving external force from the surface is resolved, the shape before receiving external force is restored. That is, the airbag functions as an outer diameter recovery means in the claims.

  As described above, the tension member 12 according to the present embodiment constitutes the backrest surface S that supports the body of the seated person, and includes the first tension member 121 and the first tension member. A second tension member 122 having a higher elastic modulus than that of the first tension member 121 and being polymerized behind the first tension member 121, and the first tension member 121 and the second tension member 122. Since the bag portion 123 that accommodates the fluid formed therebetween is provided, the bag portion 123 can be deformed by the load of the seated person, and the first tension member 121 having the backrest surface can be deformed by following. It is. Therefore, cushioning properties can be imparted to the backrest surface using the tension member 12.

  Further, since the first tension member 121 and the second tension member 122 are joined at a portion to be the outer edge of the bag portion 123 to form the bag portion 123, the back surface S By inflating or deflating the bag portion 123 of a desired portion in the upper half or the lower half, the surface shape of the desired portion can be changed without substantially affecting the surface shape of the other portion.

  Further, since the airbag portion 124 is filled with a gas such as air and is deformed by receiving a load, the tension member 12 can be suitably provided with a cushioning property. .

  Then, by expanding or contracting the bag portion 123 and changing the shape of the first tension member 121, the surface shape of the tension member 12 can be changed with a simple configuration and a simple operation.

  The present invention is not limited to the embodiment described above.

  For example, in the above-described embodiment, the bag portion is formed between the first tension member element and the second tension member element, and the airbag is disposed in the bag portion. The two upholstery elements are constituted by a sheet-like member having airtightness, and the first upholstery element and the second upholstery element are joined in a shape surrounding a predetermined area, and the first of the predetermined area is formed. A portion sandwiched between the tension member element and the second tension member element may be a bag portion, and the bag portion may be configured as an airbag that is filled with a gas such as air and is deformable under a load. Good.

  Furthermore, not only the aspect which inserts an airbag into the inside of a bag part like embodiment mentioned above, or the aspect which comprises a bag part as described in the front | former as an airbag, but a liquid or gel-like inside a bag part. A bag body filled with a fluid may be inserted, and of course, a liquid or gel fluid may be filled inside the bag portion itself.

  In addition, the upholstery according to the present invention may be employed in a chair CC as shown in FIG. The chair CC includes a leg A4 having a leg blade A41 and a leg strut A42 rising substantially vertically from the center of the leg feather 41, a base A2 supported by the leg A4, and a seat A3 disposed on the base A2. And a backrest A1 pivotally attached to the base body A2 via a horizontal support shaft A16.

  Further, the backrest A1 is formed by stretching a backrest surface portion A12 that forms a backrest surface S on the front surface of the back frame A11. The back frame A11 includes a lower frame portion A13 connected to the base A2 so as to be rotatable about a horizontal support shaft A16, and an upper frame portion A14 connected to the upper end of the lower frame portion A13 via a hinge A17. And a reaction force frame portion A15 that supports the upper frame portion A14 from the rear.

  The backrest surface portion A12 of the backrest A1 is configured by arranging a backup material A122 on the front surface of the back frame A11 and a tension member A121 on the front surface of the backup material A122. The tension member A121 employs the same configuration as the tension member 12 in the above-described embodiment.

  That is, also in this chair CC, the tension member A121 is provided in front of the back frame A11, and this tension member A121 is more elastic than the first tension area A121a as the first tension material element and the first tension area A121a. The second tension material A121b, which is a second tension material element having a high rate and is superposed on the back of the first tension material A121a, is formed between the first tension material A121a and the second tension material A121b. And a bag portion A121c for storing the fluid. The bag portion A121c is formed by joining the first tension fabric A121a and the second tension fabric A121b by a method such as stitching at a portion A121x to be the outer periphery of the bag portion A121c. An air bag A121d that is filled with a gas such as air and is deformed under a load is inserted into the bag portion A121c. The tension member A121 is attached to the backup material A122 so that the upper end portion and the left and right end portions are inserted into a concave groove provided on the side surface of the backup material A122. Further, the lower end of the backrest surface portion A12 of the backrest A1 is connected to the lower end of the back frame A11 via the backrest fixing member A123.

  Even in such a configuration of the chair CC, since the configuration as described above is adopted for the tension member A121, all the main effects in the above-described embodiment can be obtained.

  In addition, the tension member according to the present invention may be employed in addition to the backrest of the chair. For example, you may employ | adopt the structure of this invention to the tension member which forms the seat surface of the seat of a chair, the tension member which forms the front surface of the headrest of the chair which has a headrest.

  In order to change the cushioning property of such a tension member, the airbag inserted into the bag portion or the bag body configured as the airbag can be contracted and inflated by inflow and inflow of fluid such as gas. In order to achieve this, a configuration may be adopted in which one end of a tube as a fluid lead-in / out means is connected, and an air pump or the like as a fluid supply source having a check valve is connected to the other end of the tube.

  Furthermore, instead of the configuration in which the airbags 124 in the above-described embodiment are provided independently at two locations, as shown in FIG. 6 corresponding to FIG. 2, the bags (airbags B124) in the plurality of bag portions 123 are shown. The other airbags B124 may be inflated when one of the airbags B124 contracts by receiving an external force received from the support surface. Furthermore, as shown in the figure, a control valve B125 capable of restricting the flow of fluid (gas) may be provided at the communication portion between the plurality of airbags B124, B124. And you may provide the gas supply means (pump P with a check valve) which supplies gas from the outside with respect to these airbags B124 and B124.

  If configured in this way, when there are places where the load is heavily applied due to weight deviation and places where the load is small, the shape of the support surface changes according to the weight to fit the seated person and improve the sitting comfort. Can be planned. Further, since the control valve is provided, the control valve can be closed when the desired support surface shape is obtained, and the support surface shape can be fixed to the desired shape.

  In addition, various modifications can be made without departing from the spirit of the present invention.

The whole perspective view showing the chair concerning one embodiment of the present invention. The figure which shows typically the center longitudinal cross-section end surface of the backrest of the chair which concerns on the embodiment. The figure which shows typically the center longitudinal cross-section end surface of the backrest of the chair which concerns on the embodiment. The whole perspective view which shows the chair which concerns on the other embodiment of this invention. The figure which shows typically the center longitudinal cross-section end surface of the backrest of the chair which concerns on the embodiment. The figure which shows typically the center longitudinal cross-section end surface of the backrest of the chair which concerns on the other embodiment of this invention.

Explanation of symbols

C ... Chair 12 ... Tension member 121 ... First tension member 122 ... Second tension member 123 ... Bag part S ... Backrest

Claims (8)

A support surface for supporting a seated person's body, comprising a first tension element and a stretch ratio lower than that of the first tension element and superposed on the back of the first tension element. A furniture upholstery member comprising: a second upholstery element, and a bag portion containing a fluid formed between the first upholstery element and the second upholstery element. A plurality of the bag portions are provided, and each bag portion is formed by joining the first tension member element and the second tension member element at a portion to be an outer edge of each bag portion. The furniture tension member according to claim 1. The plurality of bag portions are in communication with each other, and when one of the bag portions contracts due to an external force received from a support surface, the other bag portion expands. The furniture tension member according to 2. The furniture tension member according to claim 3, wherein a control valve capable of regulating fluid flow is provided at a communication portion between the plurality of bag portions. 5. The furniture tension member according to claim 1, wherein an air bag which is filled with a gas such as air and which can be deformed under a load is inserted into the bag portion. . 5. The furniture tension member according to claim 1, wherein the bag portion is configured as an airbag that is filled with a gas such as air and that can be deformed by receiving a load. The furniture tension member according to claim 5 or 6, wherein the airbag inserted into the bag portion or the bag body configured as the airbag is capable of contracting and inflating in response to inflow and outflow of gas. . An outer shape recovery means is provided in the bag portion, which can recover the shape of the bag portion before receiving the external force when the external force from the support surface is eliminated. The furniture tension member according to 4, 5, 6, or 7.

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