JP2009172126A - Structure for mounting optional member to seat body of chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To mount an optional member on an upholstery material and to prevent the upholstery material from being torn by opening a through-hole for inserting an axial fixing means in the upholstery material. <P>SOLUTION: A low-density part 21 with a coarse mesh larger than in other parts is formed in the optional member 20 mounting part in the upholstery material 12, and by fixing screws 22 inserted into the mesh of the low-density part 21 to a backrest frame 11, the optional member 20 is mounted on the backrest frame 11 across the upholstery material 12. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an option member mounting structure to a seating body of a chair in which an option member is mounted on a seating body such as a backrest or a seat covered with a tension material.

The applicant of the present application has devised a chair with a hanger in which a hanger as an optional member is attached to the backrest formed by stretching a mesh-like tension material on the back frame (back frame), and filed a patent application first. (See, for example, Patent Document 1).
JP 2006-110013 A

As described in the above-mentioned patent document, when the optional member is attached to the backrest on which the upholstery material is stretched, the optional member is generally attached to a portion where the upholstery material is not stretched.
This is because when an optional member is fixed to a back frame on which a mesh-like tension material is stretched with screws or the like, an insertion hole such as a screw must be opened in the tension material. This is because when the hole is opened in the tension material, the tension material is easily broken when the tension is applied to the tension material, for example, the opened portion is frayed.

  The present invention has been made in view of the above problems, and allows an optional member to be attached to a tension member without opening an insertion hole through which a shaft-like fixing means such as a screw is inserted. An object of the present invention is to provide an optional member mounting structure to a seating body of a chair that can be prevented.

According to the present invention, the above problem is solved as follows.
(1) An attachment structure in which an optional member is attached to a frame of a chair seat covered with a mesh-like upholstery material with a shaft-like fixing means, and the mesh of the insertion portion of the shaft-like fixing means in the upholstery material The optional member is attached to the frame with the upholstery material interposed therebetween by inserting the shaft-like fixing means into the mesh and fixing it to the frame.

(2) In the above item (1), a low density portion having a mesh mesh coarser than other portions is formed in the attachment portion of the optional member of the upholstery material. Insert the fixing means.

(3) In the above item (2), the low density portion is covered with an optional member, and the optional member is pressed against the frame and pressed against the frame.

  According to the first aspect of the present invention, the mesh of the mesh of the insertion portion of the shaft-like fixing means for attaching the optional member in the upholstery material is made large, and the shaft-like fixing means is inserted into this mesh to form the frame of the seating body. Because it is fastened, there is no need to open an insertion hole for inserting a shaft-like fixing means such as a screw in the optional member mounting part of the tension material, and the tension material is There is no fear of breaking.

  According to the second aspect of the present invention, the low density portion can be easily formed only by roughening the knitting or weaving method of the optional member mounting portion in the upholstery material, and the shaft-like shape can be formed through an arbitrary mesh of the portion. The fixing means can be easily inserted.

  According to the invention of claim 3, since the low density portion where the tensile strength of the upholstery material is reduced is strongly pressed by the optional member and fixed to the frame, no tension acts on that portion. There is no fear that the tension material breaks starting from the low density portion. Further, the low density portion is covered with an optional member and is not exposed to the outside, so that the appearance is good.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a chair to which the present invention is applied, FIG. 2 is a side view of the chair, and the chair 1 is a leg body 4 including five leg rods 3 facing the radial direction with casters 2 attached to the tip. A pedestal 5 which is erected at the center of the pedestal 5 and can be expanded and contracted by a gas spring (not shown) accommodated therein, a support base 6 fixed to the upper end of the pedestal 5, and an upper portion of the support base 6 A pair of seats 7 attached to the left and right, a pair of left and right dorsal fins 8 with front ends pivotally attached to both sides of the support base 6, and a lower end attached to the upper part of both dorsal fins 8. And a backrest 10 that can be tilted backward against the urging force of the gas spring 9 interposed between the rear end of the support base 6 and the rear portion of the backrest 8. The seat 7 and the backrest 10 constitute a seating body.

  The backrest 10 includes a synthetic resin-made back frame 11 as shown in FIG. 3 and a bag-like upholstery material 12 that covers the entire surface except the lower end thereof.

  The back frame 11 includes a plate-like base frame 13 facing in the left-right direction of the lower half, a frame-like frame 14 having a U-shape extending downward from the upper ends of both side ends thereof, and the frame shape. The frame 14 is composed of a horizontal frame 15 that connects the opposing surfaces at the upper end of the frame 14, and the whole is integrally formed of a hard synthetic resin.

  The back frame 11 is bent substantially in the shape of a letter so that the middle part slightly below the center part in the vertical direction, that is, slightly below the center part in the vertical direction protrudes forward in a side view, and the whole is rearward It is gently curved into a convex arc shape.

  The upholstery material 12 is formed in a bag shape having a lower end opened by knitting or weaving a synthetic fiber having high tension and elasticity, such as polyamide fiber or polypropylene fiber, in a mesh shape. Before attaching to the horizontal frame 15, by covering the back frame 11 from above and fixing the lower end to the lower end of the base frame 13 by tacking or the like, the upholstery material 12 is provided with an appropriate tension, The entire back frame 11 is stretched.

  As shown in FIG. 3 to FIG. 5, an optional member is attached to the central portion in the left-right direction of the horizontal frame 15 as follows. In addition, although an optional member is a hanger, a nameplate, etc. which are described in the said patent document 1, for example, the attachment example of a nameplate is demonstrated in this embodiment.

  The left and right mounting holes 16, 16 facing in the front-rear direction and an engagement hole 17 having a slightly smaller diameter than the mounting hole 16 are formed in the center of the horizontal frame 15 in the left-right direction. Yes. At the center of the front surface of the horizontal frame 15, a mounting plate 18 whose vertical dimension faces in the left-right direction that is substantially the same as that of the horizontal frame 18 protrudes from the rear surface. The pair of rearward protrusions 19 and 19 are temporarily fixed by fitting from the front before the tension member 12 is stretched.

  As shown in FIG. 4, the mounting plate 18 is temporarily fixed, the tension member 12 is stretched on the back frame 11, and then the tension member 12 is sandwiched so that the rear surface of the horizontal frame 15 is substantially the same as the mounting plate 18. A name plate 20 comprising a board 20a facing in the left-right direction and a cover plate 20b covering the rear surface and having characters printed on the rear surface is attached as follows.

  A portion of the upholstery material 12 to which the nameplate 20 is attached, that is, a central portion in the left-right direction of the horizontal frame 15 is a low density portion 21 whose mesh mesh is coarser than other portions. A screw 22 for attaching the substrate 20a can be inserted through the mesh. The formation area of the low density portion 21 is equal to or slightly smaller than the size so as to be concealed by the substrate 20a.

 Screws 22, 22 inserted from the rear into through holes 23, 23 drilled on both sides of the substrate 20 a are inserted through the mesh of the low density portion 21 and the mounting holes 16, 16 of the lateral frame 15, and the mounting plate The mounting plate 18 and the substrate 20a are attached to the front and rear surfaces of the horizontal frame 15 by screwing them into female screw holes 24, 24 provided in the left and right rearward projecting portions 19, 19 and tightening them. It is firmly fixed. At this time, the low density portion 21 is covered with the substrate 20a and is strongly fixed to the rear surface of the horizontal frame 15 by the substrate 20a.

  After mounting the substrate 20a, a shaft-like engagement protrusion 26 projecting forward from the central portion of the front surface of the cover plate 20b is inserted into the through hole 25 provided in the central portion thereof, and through the mesh of the low density portion 21. By press-fitting into the engagement hole 17 of the horizontal frame 15, the cover plate 20b is fixed to the rear surface of the substrate 20a, and the attachment of the name plate 20 as an optional member is completed.

As described above, in the above-described embodiment, the attachment portion of the nameplate 20 on the upholstery material 12 covering the rear surface of the horizontal frame 15 is the low-density portion 21 having a coarse mesh mesh, and the mesh of the low-density portion 21 is Since the screw 22 for attaching the substrate 20a and the engaging protrusion 26 for fastening the cover plate 20b can be inserted therethrough, an insertion hole such as the screw 22 is opened in the optional member attaching portion of the tension member 12. There is no risk that the upholstery material 12 is torn due to, for example, the open portion being frayed.
Further, the low density portion 21 in which the tensile strength or the like of the upholstery material 12 is reduced is pressed by the substrate 20a and is firmly fixed to the horizontal frame 15, so that no tension acts on that portion. There is no fear that the upholstery material 12 breaks starting from the low density portion 21. In addition, since the low density portion 21 is not exposed to the outside, the appearance is good.

  In the above embodiment, the low density portion 21 having a size that can be covered by the name plate 20 is formed in the region of the attaching portion of the name plate 20 in the tension material 12. The mesh mesh of the insertion portion of the portion 26 may be made large, and the screw 22 and the engagement protrusion 26 may be inserted through this mesh.

  In the above embodiment, an example is shown in which the nameplate 20 as an optional member is attached to the backrest 10. However, the seat frame (not shown) of the seat 7 is covered with a tension material, and an armrest or the like is covered on the seat frame. The present invention can also be applied when attaching an optional member.

It is a front view of the chair to which one embodiment of the present invention is applied. Similarly, it is a side view. Similarly, it is a disassembled perspective view of a back frame and a nameplate attached to it. Similarly, it is an exploded perspective view of a back frame on which a tension material is stretched and a nameplate attached to the back frame. FIG. 5 is an enlarged cross-sectional end view taken along the line V-V in FIG. 2.

Explanation of symbols

1 Chair 2 Casters 3 Legs 4 Legs 5 Pillars 6 Supports 7 Seats (Sitting)
8 Backrest 9 Gas Spring 10 Backrest (Sitting Body)
DESCRIPTION OF SYMBOLS 11 Back frame 12 Tension material 13 Base frame 14 Frame-shaped frame 15 Horizontal frame 16 Mounting hole 17 Engagement hole 18 Mounting plate 19 Backward protrusion 20 Name plate (optional member)
20a Substrate 20b Cover plate 21 Low density part 22 Screw (shaft fixing means)
23 through-hole 24 female screw hole 25 through-hole 26 engagement protrusion (shaft-shaped fixing means)

Claims (3)

  An attachment structure in which an optional member is attached to a frame of a chair seat covered with a mesh-like tension member with a shaft-like fixing means, and the mesh mesh of the insertion portion of the shaft-like fixing means in the tension material A seat for a chair, characterized in that the optional member is attached to the frame with the upholstery material sandwiched by inserting the shaft-like fixing means into the mesh and fixing it to the frame. Optional member mounting structure.   2. A low density portion having a mesh mesh coarser than other portions is formed in an attachment portion of an optional member in the upholstery material, and a shaft-like fixing means is inserted through the mesh of the low density portion. Optional member mounting structure to the seat of the described chair.   The structure for attaching an optional member to a seating body of a chair according to claim 2, wherein the low density portion is covered with an optional member, and is pressed with the optional member and pressed against the frame.

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