JP4620950B2 - Chair backrest seat structure and method for manufacturing the same - Google Patents

Description

The present invention relates to a seat structure for a backrest of a chair, which is composed of a hard substrate, a cushion material, and a skin material, and can be used as a backrest or a seat of the chair , and a method for manufacturing the same.

Conventionally, a seat for a chair in which a cushion material made of a foam is provided on a hard substrate, and the cushion material is wrapped with a flexible skin material, and the fastening string is inserted through the periphery of the skin material on the back side of the substrate. The thing which was made to tense with a strip | line and to which the periphery of the skin material was squeezed is disclosed (for example, refer patent document 1).
JP-A-11-276731

  The technique described in the above-mentioned patent document is applied to a seat with a flat substrate, and in the backrest where the substrate is bent near the center, the tightening string is tensioned and the skin material is When the peripheral edge is narrowed, there is a problem that the peripheral edge of the skin material is greatly separated rearward from the substrate at the bent portion, and the skin material is liable to be loosened near the bent portion.

In view of the above-described problems of the prior art, the present invention prevents the outer periphery of the skin material from separating from the substrate in the bent portion, and prevents the skin material from being loosened in the vicinity of the bent portion. An object of the present invention is to provide a seat structure for a chair backrest excellent in aesthetics and a method for manufacturing the same.

According to the present invention, the above problem is solved as follows.
(1) Cover the cushion material provided on the surface of the board facing up and down with a skin material, and tighten the flexible fastening string attached to the peripheral edge of the skin material on the back side of the board. In the seat backrest structure of the chair that is made to squeeze the peripheral edge of the skin material, the substrate is bent in a substantially letter-like shape in a side view toward the back surface slightly toward the bottom from the center in the vertical direction. When the tightening string is hooked and tensioned on both sides of the back surface of the substrate in the width direction, the tightening string is formed on the substrate. A locking portion for preventing separation from the back surface is formed, and further, both ends of the fastening string are tensioned and bound at the lower portion of the back surface of the substrate .

(2) In the above item (1), the locking portion is constituted by a projecting piece formed with a groove that opens toward the rear with a narrow entrance and a wide back side.

(3) In the above item (1) or (2), the protruding piece of the locking portion is configured such that the inner portion of the groove has a larger amount of protrusion rearward than the outer portion, and the inner portion has an inlet for the groove. A guide inclined portion that is inclined toward is provided.

(4) In any one of the above items (1) to (3), a concave portion having a front view arc shape is formed on the upper edge of the substrate, and a fastening string is hooked below the concave portion on the back surface of the substrate. Provide a stop.

(5) The cushion material provided on the surface of the substrate is covered with a skin material, and a flexible fastening string attached to the peripheral portion of the skin material is tensioned on the back surface side of the substrate, thereby the skin material. In the method of manufacturing a seat structure for seating back of a chair , the periphery of the board is bent, and the bent portion is bent in a substantially letter-like shape in a side view toward the back surface slightly closer to the lower part than the central part in the vertical direction. The fastening cord is configured to prevent the fastening cord from being separated from the back surface of the substrate when the fastening cord is hooked and tensioned on both sides in the width direction of the bent portion on the back surface of the substrate. Forming a stop, inserting a tightening string into the insertion part of the peripheral edge of the skin material, hooking the tightening string together with the insertion part on the locking part, and tensioning the tightening string Te in a state of pursed periphery of the skin material, the two ends of the string shall tightening backside lower odor of the substrate Unity to.

According to the present invention, the following effects can be achieved.
(a) According to the invention described in claim 1, since the locking portions located on both sides of the bent portion of the substrate are formed on the back surface of the substrate, the fastening portion is hooked on the locking portion so that the bent portion Also, the skin material is pulled in the direction of the locking part, and is stretched tightly on the surface of the cushion material, so that the periphery of the skin material can be prevented from separating from the substrate at the bent part, and the occurrence of loosening can be prevented. And can have a beautiful appearance.

  (b) According to the invention described in claim 2, since the locking portion is constituted by a projecting piece having a narrow inlet and a wide groove on the back side, the tightening string is prevented from being fitted into the groove during tension. it can.

  (c) According to the invention of claim 3, the protrusion of the locking portion is formed such that the inner part of the groove is larger in the rearward projecting amount than the outer part, and the inner part is disposed at the groove inlet. Since the inclined guide portion is provided so as to be inclined, it can be easily and surely locked in the groove by pressing the fastening string along the guide inclined portion of the protruding piece.

  (d) According to the invention of claim 4, the arc-shaped recess is formed on the upper end edge of the substrate, and the engagement portion located on the lower side of the recess is formed on the back surface of the substrate. However, the skin material is quickly and well-fitted without any gaps on the surface of the cushion material, and does not cause slack.

  (e) According to the invention described in claim 5, the fastening cord is inserted into the insertion portion of the peripheral portion of the skin material, and the fastening cord is hooked on the locking portion formed on the substrate together with the insertion portion, and tightened. Tighten the ligaments and bind the ends of the ligaments in a state where the periphery of the epidermis has been squeezed. It can be tidy.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 is a back view of a seat structure used for a chair back, FIG. 2 is a partially cutaway side view, and FIG. 3 is an enlarged sectional view taken along line III-III in FIG. FIG. 4 is a rear perspective view showing the layout of the locking portion.

  As shown in FIG. 1 and FIG. 2, a seat structure (A) for chair backrest includes a substrate (1), a cushion material (2) molded on the substrate (1), and this cushion material (2 ) And the skin material (3) covering the surface.

  The substrate (1) is made of a hard material such as synthetic resin or metal, and includes an outer peripheral edge (1a) and a central convex part (1b) protruding from the outer peripheral edge (1a) toward the back surface. (See FIG. 3). The substrate (1) is formed with a bent portion (4) that is bent in a substantially square shape toward the back surface slightly closer to the lower portion than the central portion in the vertical direction, and the upper end portion is recessed in an arc shape when viewed from the front. A recess (5) is formed. Locking portions (6) are provided on both sides of the back surface of the substrate (1) and in the vicinity of the bent portion (4).

  As shown in FIG. 3, the locking portion (6) is formed on a substantially horizontal protruding piece (7) provided at the corner between the outer peripheral edge (1a) and the convex portion (1b) of the substrate (1). It is formed by forming a groove (8) that opens toward the rear side with a narrow entrance and a wide back side. The projecting piece (7) has a rear projecting amount of the inner portion (7a) near the convex portion (1b) of the substrate (1) with respect to the groove (8). ) And a guide inclined portion (7c) toward the entrance of the groove (8) is formed at the rear end edge. Also, a locking portion (6a) having the same shape is provided at the center in the width direction of the upper end portion of the substrate (1) so that the groove (8) faces in the left-right direction. Yes.

  The cushion material (2) is attached to the surface side of the substrate (1) by foam molding, and the skin material (3) is attached so as to cover the cushion material (2), and the end of the skin material (3) The edge is folded inward on the back surface of the substrate (1). A bag-like insertion portion (9) is formed at the tip of the end edge portion, and a flexible fastening string (10) is inserted through the insertion portion (9). Then, as shown by the arrow (11) in FIG. 3 (a), the tightening string (10) is drawn inward together with the insertion portion (9) to approach the locking portion (6), and FIG. As shown in b), the fastening string (10) is hooked in the groove (8) together with the insertion portion (9). At this time, the insertion portion (9) is applied to the inner portion (7a) of the projecting piece (7) and pressed forward along the guide inclined portion (7c), so that the insertion portion ( 9) and the fastening string (10) can be locked.

Finally, the skin state by tying After taut both ends pull (10a), Himojo tightening (10) which is hooked to the locking portion (6) of the tightening Himojo (10) The edge of the material (3) is sunk. As a result, it is possible to prevent the peripheral edge of the skin material (3) from separating from the substrate (1) in the bent portion (4), and the skin material (3) is in the vicinity of the bent portion (4) and the recess (5). No slack occurs even in the case, and the surface of the cushion material (2) is evenly stretched.

In the bent portion (4), the concave portion (5), etc., the inward squeezing force does not work, so that the skin material (3) is likely to be loosened as it is, but in the present invention, the locking portion (6) to (6a) by engaging the clamping Himojo (10), since the drawn skin material (3) to the inside, this phenomenon is not Na occur.

It is a reverse view of one Embodiment of this invention. Similarly, it is a partially cutaway side view. It is a figure which shows the latching operation of a skin material, Comprising: (a) is before an engagement, (b) is an expanded sectional view which follows the III-III line | wire of FIG. It is a back perspective view which shows the layout of a latching | locking part.

(1) Board
(1a) Outer periphery
(1b) Convex part
(2) Cushion material
(3) Skin material
(4) Bending part
(5) Recess
(6) Locking part
(6a) Locking part
(7) Projection
(7a) Inner part
(7b) Outside part
(7c) Guide slope
(8) Groove
(9) Insertion part
(10) Tightening string
(10a) Both ends
(11) Arrow
(A) Sheet structure

Claims (5)

A cushion material provided on the surface of the substrate facing in the vertical direction is covered with a skin material, and a flexible fastening string attached to the peripheral portion of the skin material is tensioned on the back surface side of the substrate to make the skin In the seat structure for the backrest of the chair that is designed to squeeze the periphery of the material,
The substrate is configured in a shape having a bent portion that is bent in a substantially square shape when viewed from the side toward the back surface slightly below the central portion in the vertical direction , and is in the vicinity of the bent portion and the width of the back surface of the substrate On both sides in the direction, when the tightening string is hooked and tensioned, a locking portion for preventing the tightening string from being separated from the back surface of the substrate is formed, and further, both ends of the tightening string A seat structure for seating back of a chair , characterized in that the portion is tensioned and bound at the lower part of the back surface of the substrate . The seat structure for a backrest of a chair according to claim 1, wherein the engaging portion is constituted by a projecting piece formed with a groove opening toward the rear side with a narrow entrance and a wide back side. The protruding part of the locking part is provided with a guide inclined part inclined toward the inlet of the groove in the inner part with a larger amount of protrusion to the rear part than the outer part and the inner part from the outer part. The seat structure for the backrest of the chair according to claim 1 or 2. 4. A concave portion having a front view arc shape is formed at an upper edge of the substrate, and a locking portion for hooking a tightening string is provided below the concave portion on the back surface of the substrate. A seat structure for a chair backrest according to claim 1. A cushion material provided on the surface of the substrate is covered with a skin material, and a flexible tightening string attached to the peripheral portion of the skin material is tensioned on the back surface side of the substrate so that the periphery of the skin material is In the manufacturing method of the seat structure for the backrest of the chair that has been reduced,
The substrate is configured in a shape having a bent portion that is bent in a substantially square shape when viewed from the side toward the back surface, slightly below the central portion in the vertical direction, and the tightening is performed on both sides in the width direction of the bent portion on the back surface of the substrate. When the tension is applied and tensioned, a locking part is formed to prevent the fastening string from being separated from the back surface of the substrate, and the fastening string is attached to the insertion part at the peripheral edge of the skin material. Inserting the fastening string together with the insertion part and hooking the locking part, and tightening the fastening string , the peripheral edge of the skin material is squeezed, the both ends of the fastening string are A method for manufacturing a seat structure for a backrest of a chair , characterized in that binding is performed at a lower portion of the back surface of the substrate .

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