JP2013094581A - Spreading method of spreading material and spreading structure of spreading material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the spreading method of a spreading material and the spreading structure of the spreading material, capable of not only strongly tightening and spreading the spreading material to a frame body but also preventing the spreading material from being damaged when spreading the spreading material, facilitating spreading work of the spreading material, and manufacturing the frame body at a low cost without using a complex and expensive die.SOLUTION: A side auxiliary frame material 10 is mounted movably in the spreading direction of the spreading material 2 on a part of a surface of a main frame material 6; the outer peripheral edge part of the spreading material 2 is inserted from the outer side to the inner side to an inward recessed groove 13 provided between the side auxiliary frame material 10 and the main frame material 6; and by a bolt 19 and a nut 20 provided on the main frame material 6, the side auxiliary frame material 10 is drawn in the pulling direction of the spreading material 2 and the spreading material 2 is spread on the surface of the main frame material 6.

Description

  The present invention relates to a tension material tensioning method and a tension material tensioning structure that can be applied to a chair backrest, seat, or headrest, or a mesh screened partition or partition.

 As a tension material tension structure, for example, the peripheral edge of the net member which is stretched on the upper surface of the seat frame of the chair and whose peripheral portion is turned inward through the upper surface and outer surface of the outer peripheral portion of the seat frame The clamping piece is fixed to the part, and the clamping piece is fitted into a circumferential holding groove provided on the lower surface of the outer peripheral portion of the seat frame, and with a clamping frame attached to the lower side of the seat frame, There is one in which tension is applied to the net member by pushing the sandwiching piece into the holding groove (see Patent Document 1).

  Further, in a tension member tensioning structure in a backrest or the like of a chair in which a tension member is tensioned on the surface of the frame body, a pair of opposite edge portions of the tension member is paired with a pair of frame frames facing each other. From the front surface of the frame, wrap around the outer edge and wind it around the back surface, and fasten it to both edges of the tension material. There is one in which a tension member is stretched on a frame body by locking (see Patent Document 2).

Japanese Unexamined Patent Publication No. 2004-049885 JP 2006-110001 A

  However, in what is described in Patent Document 1, when the clamping frame attached to the lower side of the seat frame is tightened with a bolt and the inserting piece is pushed into the holding groove, the tension member is attached to the outer periphery of the seat frame. The tension material is likely to be damaged by being pulled around the part and being rubbed against the seat frame or being rubbed against the seat frame and the fastening frame. There is.

  In the device described in Patent Document 2, the work of tensioning the tension material to wind the tension material around the upper and lower frame ridges is complicated, and the edge material is associated with the corner between the inner peripheral surface and the surface of the frame body. In order to form the concave groove for stopping, the core for forming the concave groove must be provided in the mold for forming the frame when resin molding the frame, and the molding die is complicated and It becomes expensive.

  The present invention has been made in view of the above-described problems of the prior art, and not only can the tension member be strongly tightened and stretched on the frame body, but also when the tension member is stretched. The tensioning method for tensioning the frame is simple, and the frame can be manufactured at low cost without using a complicated and expensive mold. The present invention aims to provide a tensioning structure for a tension member.

According to the present invention, the above problem is solved as follows.
(1) In the tension material tensioning method for tensioning the tension material on the surface of the frame body, an auxiliary frame material is mounted on a part of the surface of the frame body so as to be movable in the tension direction of the tension material; Tightening means provided on the frame body by inserting the outer peripheral edge of the tension member from the outside to the inside between the auxiliary frame material and the frame body or into the inward insertion portion provided on the auxiliary frame material Thus, the auxiliary frame member is pulled in the tension direction of the tension member, and the tension member is stretched on the surface of the frame body.

According to such a method, the auxiliary frame member is pulled and tightened in the tensioning direction of the tension member by the tightening means provided on the frame member, whereby the tension member is easily and strongly tightened on the surface of the frame member. be able to. Moreover, since the outer peripheral portion of the tension member moves in the tension direction of the tension member together with the auxiliary frame material when the tightening means is tightened, the tension member is not rubbed against the auxiliary frame material and the tension material is not damaged.
In addition, when the outer peripheral edge of the tension member is inserted between the auxiliary frame member and the frame body and the auxiliary frame member is pulled and tightened in the tension direction of the tension member by the tightening means, it is inserted into the auxiliary frame member. There is no need to provide a portion, the structure of the auxiliary frame material can be simplified, and the manufacturing cost can be reduced.

(2) In the tension material tension structure in which tension material is stretched on the surface of the frame body, the auxiliary frame material is mounted on a part of the surface of the frame body so as to be movable in the tension direction of the tension material; The frame body is provided with a fastening means for tightening the auxiliary frame material while pulling it in the tensioning direction of the tension material, and the outer frame material is provided between the auxiliary frame material and the frame body or on the auxiliary frame material. An insertion part for inserting the peripheral edge from the outside to the inside is provided.

With such a configuration, the tension member provided in the frame body is pulled and tightened by pulling the auxiliary frame member in the tensioning direction of the tension member so that the tension member is easily and strongly tightened on the surface of the frame member. be able to. Moreover, since the outer peripheral portion of the tension member moves in the tension direction of the tension member together with the auxiliary frame material when the tightening means is tightened, the tension member is not rubbed against the auxiliary frame material and the tension material is not damaged.
In addition, when the insertion portion for inserting the outer peripheral edge portion of the tension member is provided between the auxiliary frame member and the frame body, it is not necessary to provide the insertion portion in the auxiliary frame member, simplifying the structure of the auxiliary frame member, Manufacturing cost can be reduced.

(3) In the above item (2), in which the insertion portion is provided between the auxiliary frame member and the frame body, the opposing surface of the auxiliary frame material and the frame body forming the insertion portion is arranged inside the frame body. It is provided so as to be inclined obliquely toward the surface from the outside toward the outside, and the interval between the opposing surfaces is narrowed by tightening the tightening means.

  With such a configuration, when the tightening means is tightened, the distance between the opposing surfaces of the auxiliary frame member forming the insertion portion and the frame gradually narrows, so that the outer peripheral edge of the tension member is strongly tightened, and the tension member It is possible to reliably prevent the outer peripheral edge from slipping out of the insertion portion or being displaced.

(4) In the above item (2) or (3), the frame is substantially rectangular, and auxiliary frame members and fastening means are provided at the corners at both ends of the frame.

  With such a configuration, by tightening the auxiliary frame members in the direction away from each other by the fastening means at both ends of one side, the frame member is strongly pulled toward both sides on the side of the frame member. Can be stretched.

(5) In any of the above items (2) to (4), a hard edge member is fixed to a part of the outer peripheral edge portion of the tension member, and this edge member is inserted together with the peripheral edge portion of the tension member. Insert it into the section.

  With such a configuration, a part of the outer peripheral edge of the tension member can be easily inserted into the insertion part together with the edge material, and a part of the outer peripheral edge of the tension member is locally pulled out of the insertion part. Or misalignment can be prevented.

  According to the present invention, not only can the tension member be tightly tightened and tensioned to the frame body, but also the tension material is not damaged when the tension material is tensioned, and the tension material tensioning operation is simple. In addition, it is possible to provide a tension material tensioning method and a tension material tension structure in which a frame can be manufactured at low cost without using a complicated and expensive metal mold.

It is a front view of the backrest of the chair to which the tension material tension structure of the present invention is applied. Similarly, it is an exploded front view when the tension member is removed. Similarly, it is an exploded perspective view. It is the IV-IV line expansion vertical side view of FIG. FIG. 5 is an enlarged cross-sectional plan view taken along line VV in FIG. 1. FIG. 6 is an enlarged cross-sectional plan view taken along line VI-VI in FIG. 1. FIG. 7 is an enlarged cross-sectional plan view taken along line VII-VII in FIG. 1. It is a cross-sectional top view of the same part as FIG. 7 which shows the state before tightening a volt | bolt.

Hereinafter, an embodiment in which the present invention is applied to a backrest of a chair will be described with reference to the drawings.
As shown in FIGS. 1 to 3, the backrest of the chair includes a back frame 1 made of a hard synthetic resin having a substantially square front shape, and a tension member 2 stretched on the surface of the back frame 1, that is, the front surface. I have.

  As shown in FIG. 3, the back frame 1 has a pair of left and right side frames 3, 3 that are gently bent in a U-shape so that a portion slightly below the center in the vertical direction protrudes forward in a side view. The upper end of the upper frame 4 and the lower ends of the side frames 3 and 3 are connected to each other and connected to the upper frame 4 that gently curves in an arc shape so that the center in the left-right direction protrudes rearward in plan view. A main frame member 6, which is a frame body composed of a lower frame rod 5 that is connected substantially linearly, and a central portion and both side portions at a central portion of a recess 7 that is provided on the front surface of the lower frame rod 5 in the left-right direction. The lower auxiliary frame member 9 fixed with the three fixing screws 8 and side auxiliary frame members 10 attached to both sides of the recess 7 of the lower frame ridge 5 on both sides as described below. And.

As shown in the upper part of FIG. 4 and FIG. 5, continuous grooves 11 are provided on the upper surface of the upper frame rod 4 and the outer surfaces of the left and right side frame rods 3, 3.
As shown in the lower part of FIG. 4, a concave groove recessed upward is formed between the lower end of the lower auxiliary frame member 9 attached to the front surface of the lower frame ridge 5 and the lower end of the lower frame ridge 5. 12 is formed.

The outer peripheral edge portion of the corner portion that curves in an arc shape from the lower end portion of each side auxiliary frame member 10 and the corner portion that curves in the arc shape of the outer end portion from the lower end portion of the lower frame ridge 5 that opposes the front and rear thereof. A concave groove 13 is formed between the outer peripheral edge of each of the two.
The concave groove 13 is recessed upward between the lower end portion of the side auxiliary frame member 10 and the lower end portion of the lower frame ridge 5 in the same manner as the concave groove 12. As it rises along the outer peripheral edge of the corner portion, it gradually indents toward the inner rear.

  That is, as shown in FIG. 7, on the rear surface of the outer peripheral edge portion of the corner portion that is curved in an arc shape at the outer end of each side auxiliary frame member 10, from the inside of the corner portion of the main frame member 6 to the outside. An inclined surface 14 that is inclined obliquely toward the surface is formed, and an inclined surface 15 that is inclined in the same direction as the inclined surface 14 is formed on the front surface of the outer peripheral edge of the corner portion of the lower frame ridge 5 that opposes the front and rear thereof. An outer end portion of the groove 13 that is formed and is obliquely recessed toward the inner rear is formed by the inclined surfaces 14 and 15.

  To be more precise, the two inclined surfaces 14 and 15 are gently arcuate curved surfaces having a center of curvature on the rear outer side of the main frame member 6.

  Due to the concave grooves 11, 12, and 13, the outer peripheral edge portion of the tension member 2 is continuously inserted into the outer peripheral portion of the back frame 1 inward (even if partly discontinuous on the way) (Good) Closed loop insertion part is formed.

In place of the concave grooves 12 and 13, concave grooves similar to the concave grooves 11 are formed from the lower surface of the lower auxiliary frame member 9 and the lower surfaces of the both side auxiliary frame members 10 and 10 to the outer peripheral surfaces of the corner portions on both sides. May be provided.
In addition, the concave groove on the lower surface of each side auxiliary frame member 10 has a complete groove shape similar to the concave groove 11, and the rear wall portion of the groove is cut off on the outer surface of each side auxiliary frame member 10. And you may make it form the inclined surface 14 which inclines toward the inner back shown in FIG. 7 by the front wall part of a ditch | groove.

  A rearward projecting piece 16 is provided at an intermediate portion in the left-right direction at the upper part of each side auxiliary frame member 10, and a rear portion of the rearward projecting piece 16 and a lower outer portion of the main frame member 6 aligned in the left-right direction. Bolt insertion holes 17, 18 facing in the left-right direction are provided in a straight line on the side surface (the connecting portion between the side frame rod 3 and the lower frame rod 5).

A nut 20 threadably engaged with a bolt 19 inserted through the bolt insertion holes 17 and 18 is aligned with the central axis of the bolt insertion holes 17 and 18 on the inner surface of the rear portion of the rearward protruding piece 16 It is provided so as not to rotate with respect to the part auxiliary frame member 10. Instead of the nut 20, a female screw hole that is screwed into the bolt 19 may be directly formed in the rearward projecting piece 16.
The side auxiliary frame member 10 is attached to the main frame member 6 so as to be movable in the left-right direction, which is the tension direction of the tension member 2, by screwing the bolts 19 and the nuts 20 as tightening means.

  As shown in FIG. 3 and FIG. 7, a pair of left and right fitting recesses 25 that are open downward and outward are provided on the lower outer surface of the side frame rods 3 and 3 in the main frame member 6. 6 and FIG. 7, as shown by imaginary lines, both end portions of a lateral frame (not shown) that supports the back frame 1 and faces the left-right direction in a substantially upward U-shaped backrest support frame 26 in front view. A pair of left and right standing frames 26a that are more upright are fitted, and the head of the bolt 19 is covered with a cover 28 that closes the standing frame 26a and an opening 27 provided in the standing frame 26a.

  As shown in FIGS. 3 and 6, the inner end portion of each side auxiliary frame member 10, when properly attached to the main frame member 6, has the heads of the fixing screws 8 on both sides of the lower auxiliary frame member 9. Each side auxiliary frame member 10 is covered from the front, and its front end portion is fitted into a stepped portion 9a slightly recessed in the rear provided inside the screwed portions on both sides of the lower auxiliary frame member 9. The front surface of the inner end portion and the front surface of the lower auxiliary frame member 9 are flush with each other.

  As shown in FIG. 3, the upholstery material 2 is formed in a square shape by a mesh material, a woven fabric, a canvas, or the like, a side edge material 21 is formed on both side edges, and an upper edge material 22 is formed on an upper edge. A central lower edge material 23 and both side lower edge materials 24, 24 are fastened to the center and both sides of the lower edge by sewing, tackering, bonding, or other fastening means. Yes.

Next, the point of implementation of the invention of the tension material tension method will be described as a tension material 2 tension method on the surface of the back frame 1 of the chair.
A lower auxiliary frame member 9 is fitted in the center of the recess 7 of the lower frame rod 5 in the main frame member 6, and the lower auxiliary frame member 9 is attached to the lower frame rod 5 with three fixing screws 8. After the fixing, the left and right side auxiliary frame members 10 and 10 are arranged so that their inner ends cover the heads of the fixing screws 8 on both sides of the lower auxiliary frame member 9 from the front, and the rearward protruding pieces 16 8 is aligned with the inside of the bolt insertion hole 18 in the main frame member 6, and the bolt 19 is sequentially inserted from the outside of the main frame member 6 into the bolt insertion holes 18 and 17, as shown in FIG. In addition, the left and right side auxiliary frame members 10 and 10 are put in a temporarily fixed state by loosely screwing the bolts 19 into the nuts 20 so that the interval between the concave grooves 13 is larger than the intended one. .

  From this state, as shown in the upper part of FIG. 4, the upper edge member 22 fixed to the upper edge portion of the tension member 2 together with the upper edge portion of the tension member 2 is the upper surface of the upper frame rod 4 in the main frame member 6. The left and right side lower edge members 24, 24 fastened to the both side edges of the tension member 2 are inserted into the concave grooves 11 in the downward direction, as shown in FIG. At the same time, it is inserted into the concave grooves 11 on the outer side surfaces of the side frame rods 3 and 3 inward, that is, toward the center of the main frame member 6, and further, as shown in the lower part of FIG. In the groove 12 formed between the lower edge of the lower auxiliary frame material 9 and the lower edge of the lower frame rod 5 together with the lower edge of the tension member 2, Finally, the side lower edge members 24, 24 which are fixed to both sides of the lower edge portion of the tension member 2 are inserted into the lower edge portion of the tension member 2. Between the lower end portion of the left and right side auxiliary frame members 10 and 10 and the outer edge portion, and the lower edge portion of the lower frame ridge 5 facing the front and rear thereof and the portion from the lower edge portion to the outer edge portion. It inserts in the formed ditch | groove 13 toward upper direction and inner back.

  Next, when the left and right bolts 19 are sequentially tightened, each side auxiliary frame member 10 is gradually moved outward with the tightening, and the lower portion of the tension member 2 is pulled outward in the left-right direction. I ’m nervous.

Further, as each side auxiliary frame member 10 is moved outward, the interval between the concave grooves 13 that are insertion portions gradually decreases, and the rearward projecting pieces 16 are formed on the lower frame as shown in FIG. At the completion of tightening in contact with the inner surface of the rising portion (or side frame ridge 3) on both sides of the heel 6, the interval between the concave grooves 13 becomes the smallest, and the side lower edge member 24 and the tension member 2 inserted there The lower side edges of the side are strongly tightened by the inclined surface 14 of the side auxiliary frame member 10 forming the concave groove 13 and the inclined surface 15 of the lower frame rod 5, It is possible to reliably prevent the peripheral edge from slipping out of the groove 13 or being displaced.
Further, when the tightening of the bolt 19 is completed, the inner end portion of the side auxiliary frame member 10 is fitted into the step portion 9a of the lower auxiliary frame member 9 as shown in FIG. The front surface of the inner end portion and the front surface of the lower auxiliary frame member 9 are the same surface.

  Since the tensioning structure and tensioning method of the tension member of the present invention are configured as described above, the side auxiliary frame material 10 is attached by the fastening means (bolts 19 and nuts 20) provided on the main frame material 6. By pulling and tightening the tension member 2 in the pulling direction, the tension member 2 can be easily and strongly tightened on the surface of the main frame member 6. Moreover, when the fastening means is tightened, the outer peripheral portion of the tension member 2 moves in the tension direction of the tension member 2 together with the side auxiliary frame member 10, so that it is not rubbed against the side auxiliary frame member 10. The material 2 is not damaged.

  Further, the outer peripheral edge of the tension member 2 is inserted between the side auxiliary frame member 10 and the main frame member 6, and the side auxiliary frame member 10 is pulled in the tension direction of the tension member 2 by the fastening means. Since it is tightened, there is no need to provide an insertion portion in the side auxiliary frame member 10, the structure of the side auxiliary frame member 10 can be simplified, and the manufacturing cost can be reduced.

  Further, when the tightening means is tightened, the interval between the inclined surfaces 14 and 15 forming the insertion portion is gradually narrowed, so that the outer peripheral edge of the side lower edge member 24 and the tension member 2 is strongly tightened, and the outer surface of the tension member 2 is It is possible to reliably prevent the peripheral edge from slipping out of the groove 13 or being displaced.

The present invention is not limited only to the above-described embodiments, and can be implemented in various modified modes as follows, for example, without departing from the scope of the claims.
(1) A side auxiliary frame member 10, a bolt 19, a nut 20 and the like are also provided at a corner portion between the upper frame rod 4 and the left and right side frame rods 3, 3 in the main frame member 6, and the tension member 2 is The upper part is also tightened to the main frame member 6 by tightening in the left-right direction.
(2) One of the side auxiliary frame members 10, bolts 19 and nuts 20 provided on the left and right sides of the main frame member 6 is omitted.

  The above embodiment is a case where the present invention is applied to a tension material tension structure and a tension method in a chair backrest, but the present invention is not limited to this, for example, a chair seat, Alternatively, the present invention can also be applied to a tensioning structure and a tensioning method for a headrest or a mesh tension partition or partition.

DESCRIPTION OF SYMBOLS 1 Back frame 2 Tension material 3 Side frame 杆 4 Upper frame 下 5 Lower frame ６ 6 Main frame material (frame body)
7 recess 8 fixing screw 9 lower auxiliary frame material 9a step portion 10 side auxiliary frame material 11, 12, 13 concave groove (insertion portion)
14, 15 Inclined surface 16 Backward projecting pieces 17, 18 Bolt insertion hole 19 Bolt 20 Nut 21 Side edge material 22 Upper edge material 23 Central lower edge material 24 Side lower edge material 25 Fitting recess 26 Back support frame 26a Standing frame 27 Opening 28 Cover

Claims (5)

In the tensioning method of tensioning the tension material on the surface of the frame,
An auxiliary frame member is attached to a part of the surface of the frame body so as to be movable in the tensioning direction of the tension member, and is directed between the auxiliary frame member and the frame body or inwardly provided on the auxiliary frame member. The outer peripheral edge of the tension member is inserted into the insertion portion from the outside to the inside, and the auxiliary frame member is pulled in the tension direction of the tension member by the fastening means provided on the frame member, so that the tension member is attached to the frame member. A tensioning method for tensioning, characterized in that it is tensioned on the surface of the fabric. In the tensioning structure that stretches the tension material on the surface of the frame,
Attaching the auxiliary frame material to a part of the surface of the frame body so as to be movable in the tensioning direction of the tension material, and tightening the auxiliary frame material to the frame body while pulling the auxiliary frame material in the tensioning direction of the tension material A tension member provided with means, and further provided with an insertion portion for inserting an outer peripheral edge portion of the tension member from the outside to the inside between the auxiliary frame member and the frame body or in the auxiliary frame member. Tensioning structure.   In the case where the insertion portion is provided between the auxiliary frame member and the frame body, the opposing surface of the auxiliary frame material and the frame body forming the insertion portion is closer to the surface from the inside of the frame toward the outside. The tensioning structure for a tension member according to claim 2, wherein the tensioning means is provided so as to be inclined obliquely, and the interval between both opposing surfaces is narrowed by tightening of the tightening means.   4. The tension member tensioning structure according to claim 2, wherein the frame body is substantially rectangular, and auxiliary frame members and fastening means are provided at corners at both ends of one side thereof.   The hard edge material is fixed to a part of the outer peripheral edge portion of the tension member, and the edge material is inserted into the insertion portion together with the peripheral edge portion of the tension material. The tension structure of the tension material in any one.

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