JP5534754B2 - Chair support structure - Google Patents

Description

  The present invention relates to a support structure for a chair used for a seat or back of a chair.

  Known support structures for chair seats include those described in Patent Documents 1 and 2 below. In the support structure of Patent Document 1, a series of flexible ridges bent downward are provided on the left and right sides and the rear of the seat shell supported by the leg frame of the chair. Moreover, in the support structure of patent document 2, the seat shell which has the receiving part which receives the said front-back direction frame is mounted on the seat receiving frame which has the front-back direction frame on either side, An expansion / contraction part that can be elastically extended in the left-right direction is provided on the inner side.

JP 2005-34298 A JP 2003-284617 A

  In the support structure of Patent Document 1, a series of flexible concave stripes that extend not only to the left and right but also to the rear are arranged, so that the strength is good, but the rear flexible concave is the left and right flexibility. The cushioning property is relatively inferior because it inhibits the bending of the recess. On the other hand, in the support structure of Patent Document 2, the seat shell is stretched by the left and right expansion / contraction parts when seated, and is easily elastically deformed in a downward curved shape, and has excellent cushioning properties, but each expansion / contraction part expands and contracts. However, it is inferior in strength. In both support structures, the seat shell is placed on the entire top surface of each frame, so if the size of each frame is different, the size of the seat shell must be changed accordingly. It is necessary to prepare seat shells having different sizes. In particular, in the case of Patent Document 2, since the seat shell is supported on the left and right, when the size is changed in the left and right direction (width direction), the corresponding seat frame and seat Each shell is required.

Therefore, as the invention according to claim 1, good strength while being capable of forming a thin, Ri compatible der to further chair of various sizes, in accordance with the intensity distribution to a normal load distribution, while a thin and even more simpler per substrate is intended to provide a support structure capable der Ru chair be provided with a sufficient strength as a whole.

In order to achieve the above object, the invention described in claim 1 includes a plate-like base material disposed on the seat and / or the back of the chair, and only the front and rear edges and / or the upper and lower sides of the base material. A support member that supports only the edge, and the base has protrusions along the edges at the left and right edges, and at least the inner wall portion of the protrusions is seated. The vertical load distributed in the front-rear direction of the seat and / or the horizontal load distributed in the vertical direction of the spine in the base material at the time is increased as the height increases .

  In addition to the above object, the invention described in claim 2 is the above invention, in order to achieve the object of enabling the base material to be easily and thinly configured while sufficiently securing the strength. It is formed by at least one of bending the edge, increasing the thickness of the edge, and increasing the thickness of the edge.

In addition to the above object, the invention described in claim 3 is provided with the above-described object in order to achieve an object of achieving both the strength and the cushioning property by providing the cushioning with further excellent strength while maintaining high strength in an efficient configuration. there, the projecting portion is downward and / or rearward projecting a U-shaped cross section comprising an outer wall portion to resist the inner wall portion and the load to deform to follow the load during seating It is characterized by this.

In order to achieve the object of further improving the cushioning property in addition to the above object, the invention according to claim 4 is the above invention, wherein the base material has a plurality of holes in a portion that contacts the body. It is characterized by having.

In addition to the above object, the invention described in claim 5 is suitable for the above-mentioned object in order to achieve the object of adapting to a general seat and back shape and facilitating the formation of the protruding portion and the supporting portion of the base material. The base material has a rectangular shape.

According to the present invention has a base material only in the left and right edge with a protrusion along the edge, and a support member for supporting the edge that is not formed of the projecting portion in the substrate In addition, at least the inner wall portion of the protruding portion is formed to be higher as the vertical load distributed in the front-rear direction of the seat and / or the horizontal load distributed in the vertical direction of the back of the base material when seated is larger. Yes. Therefore, it is possible to achieve a sufficient mechanical strength while being able to be thin, and it is possible to cope with backs and seats of various widths with one kind of base material, particularly As a size variation of chairs, a specific number of chairs are arranged within a predetermined width (for example, arrangement of a specific number of chairs on a table with a predetermined width, arrangement of a specific number of chairs according to the design capacity in a hall with a predetermined width) From the viewpoint of dealing with physiques and differences in physique, there is a greater demand for support in the width direction (multiple types of widths) than in the front and rear sizes. There is a remarkable effect that it is possible to cope with various types of base materials.

It is explanatory drawing of the mobile bleacher seat which applied this invention to the seat. It is (a) top view of the support structure of the chair which concerns on this invention, (b) Left-right direction centerline sectional drawing, (c) It is a rear view. (A) Plan view, (b) CL-CL sectional view, (c) OO sectional view, (d) AA sectional view, (e) B- B line sectional view, (f) CC line sectional view, (g) DD line sectional view, (h) EE line sectional view, (i) FF line sectional view, (j) G- FIG. FIG. 4 is an enlarged cross-sectional view of a protruding portion in the base material of FIG. 3 before (a) load application and (b) after load application.

  Hereinafter, an example of an embodiment according to the present invention will be described with reference to the drawings as appropriate. In addition, the said form is not limited to the following example.

  As shown in FIG. 1, the chair support structure (support structure) 1 according to the present invention is preferably used as a core material in a seat P of a moving observation seat M. As shown also in FIG. 2, the support structure 1 includes a base material 2 and a support material 4, and supports the front and rear edges of the base material 2 before and after the support material 4, respectively. Note that a cushion (not shown) (not shown) is disposed on the upper portion of the base material 2, and a cover 6 that covers the cushion and the base material 2 or the support material 4 is further provided. Further, rotation mechanisms T1 and T2 are respectively arranged at the left and right rear portions of the seat P or the rear portions of the armrests R, and the seat P and the armrests R can be flipped up to the back H side by the rotation of the rotation mechanisms T1 and T2. It has become. In addition, the mounting portions J1 and J2 of the mobile viewing seat M are rotatable with respect to the floor L, and the mobile viewing seat M is tilted forward with the seat P and each armrest R flipped up. It can be stored along the floor L. The seat P and the back H are formed thin so that they can be stored.

  The base material 2 also shown in FIG. 3 is a resin molded product having a rectangular plate shape as a whole, and a plurality of mounting holes 10 for mounting the support members 4 arranged at the front and rear edges respectively, A plurality of cushion holes 12 arranged from the center to the rear so as to correspond to the contact position of the body (saddle), and protrusions 14 provided so as to extend in the front-rear direction at the left and right edges, respectively. . In addition, the part except the edge of the base material 2 is provided with a gentle valley-like curve with the center at the rear as the bottom, so that it fits the seated person's buttocks. In addition, a cushion hole 12 is disposed in the depression of the curve. Further, a screw reaching the support material 4 is passed through the mounting hole 10, and the base material 2 is fixed to the support material 4.

  As shown in FIG. 4, each protruding portion 14 is formed in a U-shaped cross section composed of an outer wall portion 14a, an inner wall portion 14b, and a connecting portion 14c that connects them, and protrudes downward. Yes. As shown in FIGS. 3C to 3J in particular, each protrusion 14 is formed such that its downward height (height of the outer wall 14a and the inner wall 14b) gradually changes. ing. That is, each protrusion 14 has a height corresponding to the front-rear position of the substrate 2. Further, the outer wall portion 14 a in each protruding portion 14 also has a height corresponding to the front-rear position of the base material 2. In addition, since the inner side wall part 14b becomes the height which followed the curve of the base material 2, the outer side wall part 14a is higher than the inner side wall part 14b except for the front and rear end edges.

  And each protrusion part 14 (especially outer wall part 14a) is a thing according to distribution in the front-back direction of the vertical load of the seat P assumed at the time of seating. In other words, it is usually assumed that the center of the buttocks that is most loaded in the front-rear direction is located at the center of the rear, and the load in the front-rear direction is reduced even though the thigh is located further forward from the center of the rear. It is assumed that the seated person's body is generally not located behind the center of the rear part, and it is assumed that the load in the front-rear direction is reduced relatively steeply as it goes rearward. 14a) is formed such that the higher the load, the higher the height.

  As described above, each protruding portion 14 (particularly the outer wall portion 14a) has a height corresponding to the load distribution at the time of sitting on the base material 2 as the seat P in the front-rear direction, and the load at a certain position It has a height at the position corresponding to the size and has a strength corresponding to the load, and is formed so that the larger the load at that position, the higher the strength and the corresponding strength.

  In other words, the height of each protrusion 14 (particularly the outer wall 14a) is designed in accordance with the load distribution in the front-rear direction that occurs at a general seating position. The higher the vertical load seen in the front-rear direction at a certain position, the higher the height of each protrusion 14 (particularly the outer wall portion 14a). The higher the load, the stronger the strength, and the lower the load. It is designed not to be higher than necessary or to be low without providing strength.

  In addition, each protrusion part 14 is formed in the state where the outer side wall part 14a and the inner side wall part 14b are lose | eliminated in the front edge and rear edge of the base material 2, and the connection part 14c becomes a series with the other part of the base material 2. . Further, the distance between the upper side of the outer wall portion 14a and the upper side of the inner wall portion 14b (the width of the protruding portion 14) in each protruding portion 14 is constant, and in each protruding portion 14, the outer wall portion 14a or As the height of the inner wall portion 14b is higher, the width of the connecting portion 14c is shorter.

  The support structure 1 described above includes a plate-like base material 2 disposed on the seat P of the movable viewing seat M, and a support material 4 that supports the front and rear edges of the base material 2. Has protrusions 14 along the edges on the left and right edges. Therefore, the support structure 1 can be formed with the same base material 2 even when the support material 4 and the seat P have different widths (for example, the support material 4a in FIG. 2). It is possible to correspond to a seat P having a wide width. Furthermore, since the protrusion part 14 is arrange | positioned in the edge which is not supported by the support material 4, compared with the case where there is no protrusion part 14 about the base material 2, strength can be improved, while making the base material 2 sufficient strength, The supporting structure 1 can be formed thin enough to be compatible with the seat P or the like of the mobile observation seat M, and has sufficient strength in the support structure 1 in which only the front and rear edges of the base material 2 are supported by the support material 4. Can be made. In particular, in a chair in which a rotating mechanism T1 for storage such as a moving seat M is arranged on the left and right of the seat P and various widths are required, a few types of base materials 2 are prepared. It is possible to cope with various changes related to the width of the seat P.

  Further, in the support structure 1, since the protruding portion 14 is formed by bending the left and right edges, the protruding portion 14 can be simply configured. In particular, the protruding portion 14 itself has strength by bending. However, it can be formed thin.

  Furthermore, in the support structure 1, the protrusion 14 is formed higher as the vertical load distributed in the front-rear direction of the seat P in the base material 2 when seated is larger, that is, the protrusion 14 (particularly the outer wall 14 a). ) Depending on the vertical load distribution (vertical load distribution from the thigh to the buttocks at the normal seating position by a general seated person) in the front-rear direction (the direction along itself) The height is gradually increased from the front to the center of the rear, highest at the center of the rear, and further decreased toward the rear. Therefore, the strength corresponding to the load can be provided at each position in the longitudinal direction of each protrusion 14, and the strength distribution of each protrusion 14 should correspond to the normal load distribution in the longitudinal direction. The projection 14 can be simplified, and the substrate 2 can be made thin while providing sufficient strength.

  Furthermore, in the support structure 1, the projecting portion 14 projects downward and has a U-shaped cross section including an inner wall portion 14 b that deforms following the load when seated and an outer wall portion 14 a that resists the load. Therefore, while ensuring sufficient strength mainly at the outer wall 14a, cushioning can be imparted mainly at the inner wall 14b, and both high strength and excellent cushioning can be achieved in an efficient configuration. Can be planned.

  In addition, in the support structure 1, the inner wall portion 14 b is formed at a height corresponding to the load distribution at the time of sitting, and is formed higher as the load (vertical load, front-rear direction) is larger. The larger the load, the better the followability with respect to the load of time, and the cushioning property can be made appropriate while considering the strength.

  Further, in the support structure 1, since the plurality of cushion holes 12 are disposed in the portion corresponding to the body (the heel part) of the base material 2, the cushioning property of the thin base material 2 with sufficient strength should be further improved. Can do.

  Furthermore, in the support structure 1, since the base material 2 is rectangular, it is easy to adapt to the shape of a general rectangular seat or spine, and the protruding portion 14 and the support portion 4 can be easily arranged.

[Example of change]
In addition, the other form of this invention which mainly consists of changing the said form is illustrated. By supporting an elastic body (spring, rubber, etc.) between the mounting hole of the base material and the support material, the base material is supported by the support material. Omission of curves and cushion holes in the substrate are omitted. The width of the entire protruding portion is changed according to the front-rear position, or the connecting portion of the protruding portion is made constant regardless of the front and rear. Various angles are formed between both wall portions of the protruding portion. Instead of the projecting portion projecting downward, the projecting portion projects upward, or these are mixed. The protrusions are different from each other, such as different in height, distribution, arrangement, degree of difference in wall height, distribution, wall angle, and the like. The protrusion is formed by increasing the thickness of the edge, increasing the thickness of the edge, increasing the thickness of the bent edge, or bending the edge to increase the thickness. The support material is not a seat frame, but an arm that supports the front and back of the base material on two parallel sides in an H shape in plan view. Instead of having a base material and its cover or urethane cushion, the base material directly contacts the buttocks without a cover. The substrate or support structure is incorporated into the back of a moving bleacher seat, or the seat and / or back of another chair.

1 (chair) support structure 2 base material 4 support material 12 cushion hole (hole)
14 Protruding part 14a Outer wall part 14b Inner wall part

Claims (5)

A plate-shaped substrate, which is located in the seat and / or back of a chair, and a support member for supporting only the edges only and / or the upper and lower edges of the front and rear of the substrate,
The base material has protrusions along the edges at the left and right edges ,
At least the inner wall portion of the projecting portion is formed to be higher as the vertical load distributed in the front-rear direction of the seat and / or the horizontal load distributed in the vertical direction of the back of the base material when seated is larger . The support structure of the chair characterized by the above-mentioned. The protruding portion is formed by at least one of bending the edge, increasing a thickness of the edge, and increasing a thickness of the edge. 2. The chair support structure according to 1. The protrusion is
Projecting downward and / or backward,
Chair according to claim 1 or claim 2, characterized in that there is a U-shaped cross section including an inner wall and an outer wall portion to resist the load to deform to follow the load during seating Support structure. The chair support structure according to any one of claims 1 to 3, wherein the base member has a plurality of holes in a portion that contacts the body. The chair support structure according to any one of claims 1 to 4, wherein the base material has a rectangular shape.

Images