JPH0733148U - Cushion seat plate mounting structure - Google Patents

Abstract

(57) [Abstract] [Purpose] With regard to the structure for removably attaching the cushion seat plate to the chair body, the structure is simplified to reduce the cost, and the cushion seat plate can be removed only by a predetermined procedure. Even if it is installed in a place, etc., make it less likely to receive unnecessary damage. [Structure] A plurality of hooks 5 each having a front end facing rearward are provided side by side in a side-by-side manner near the front edge of the upper surface of the horizontal plate portion 2 of the chair main body 1, and the hooks 5 extend from the center of the horizontal plate portion 2 toward the rear side. An individual mounting hole 7 is provided, and an engaging hole 13 for engaging the hook 5 is provided near the front edge of a seat plate 8 having a cushion material 9 stretched on the upper surface thereof. A hard elastic plastic dowel 15 having an expandable / retractable tip portion 21 that can be detachably fitted in the mounting hole 7 is provided on the lower surface.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure in which a cushion seat plate is detachably attached to a chair body.

[0002]

[Prior art]

 Conventionally, for example, as disclosed in Japanese Unexamined Patent Publication No. 4-246309, a cushion mounting structure for a chair has a structure in which a metal mounting wire is embedded in a cushion material such as urethane and a part of the mounting wire is attached. It is known that the cushion wire is exposed in a recess on the lower surface of the cushion material, and the attachment wire material is supported by an attachment piece projecting from the chair body.

[0003]

[Problems to be solved by the device]

 However, such a structure in which the mounting wire is embedded in the cushioning material has the problem that the bending process of the mounting wire and the burying process, and the like, increase the manufacturing cost, and the cushioning material has a sufficient thickness. If it does not have such a thickness, there is a problem in that the presence of the mounting wire gives the user a rugged feel and does not give a good feeling in use.

Further, in general, there is a demand for the cushion seat plate to be detachably attached so that the surface thereof is damaged or soiled, or it can be replaced for pattern replacement. A detachable mounting structure that uses a dowel that is made of elastic plastic so that the tip part can expand and contract has been adopted, but if such a structure is easy to remove, you can sit on a chair and sit down. There is a problem that the seat board is easily detached from the chair body by unnecessarily lifting the front edge of the board and is not suitable for use in public places.

[0005]

[Means for Solving the Problems]

 The cushion seat plate mounting structure of a chair according to the present invention is intended to solve the above-mentioned problems, and several hooks whose front ends are rearward are arranged side by side near the front edge of the upper surface of the horizontal plate portion of the chair body. Engagement in which the hook engages near the front edge of the seat plate that is projecting and has several mounting holes from the center of the horizontal plate toward the rear, and the cushion material is stretched on the upper surface. A hole is opened, and a dowel made of hard elastic plastic having an expandable / retractable tip end portion which can be detachably fitted in the mounting hole is provided on the lower surface of the seat plate.

[0006]

[Action]

 Since the front edge of the seat plate is engaged with the rearward hook projecting from the horizontal plate portion of the chair body, it does not come off even when lifted upward and does not come off unnecessarily. Then, if the rear portion of the seat plate is lifted, the dowel is disengaged from the mounting hole, and then the hook is disengaged from the engaging hole by a person who slides the seat plate rearward, so that the hook can be easily removed. Also when mounting, it is possible to easily handle by first engaging the engaging hole with the hook and then fitting the dowel into the mounting hole.

[0007]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a chair body in which a horizontal plate portion 2 and a backrest plate portion 3 are integrally formed of hard elastic plastic, and a supporting leg (not shown) is provided on the lower surface of the horizontal plate portion 2. . Note that reference numerals 4 and 4 denote clasps screwed to the upper ends of the supporting legs.

As shown in the enlarged view of FIG. 2, three hooks 5 with their front ends facing rearward are provided side by side in a juxtaposed manner near the front edge of the upper surface of the horizontal flat plate portion 2. Reference numeral 6 is a rib formed to reinforce the hook 5 and for the reason of resin molding. Further, a total of four mounting holes 7 are opened from the center of the horizontal plate portion 2 to the rear side.

Further, 8 is a seat plate formed of an elastic plastic such as polypropylene into an annular plate shape having a hole 11 in the center, and a cushion member 9 such as urethane foam is arranged on the upper surface of the seat plate 8. The cushion material 9 is covered with a skin material 10 such as a vinyl chloride sheet, and the peripheral edge portion of the skin material 10 is fixed to the lower side of the seat plate 8 by a binding needle 12. A rectangular engaging hole 13 into which the hook 5 can be engaged is formed near the front edge of the seat plate 8. A stepped lower surface portion 14 is formed on the rear side edge of the engagement hole 13 as shown in an enlarged view in FIGS.

Reference numeral 15 denotes a hard elastic plastic dowel attached so as to project from the lower surface of the seat plate 8. The dowel 15 has a base end as shown in an enlarged view in FIGS. By forming slits 18 in a longitudinally divided manner from the tip of the tubular body in which the flange 16 is formed, four elastic pieces 19 are divided and formed, and on the outer periphery of the tip end portion 21 of each elastic piece 19. The wedge-shaped engaging portion 20 is integrally formed. Therefore, the tip portion 21 can be expanded and contracted by the elasticity of the elastic piece 19. The dowels 15 are attached to the seat plate 8 so as to project to the lower surface by previously inserting into the through holes 29 formed in the seat plate 8 so as to face the mounting holes 7. It can be detachably fitted to.

However, when the lever plate 5 is attached to the horizontal plate portion 2 of the chair body 1, the hook 5 is inserted into the engaging hole 13 and the seat plate 8 is slid forward so that the hook 5 is attached. As shown in FIG. 4, when the seat plate 8 is engaged with the lower surface portion 14 and a load is applied to the seat plate 8 to push it down, the distal end portion 21 of the dowel 15 fits into the mounting hole 7. When the tip portion 21 passes through the mounting hole 7, the diameter thereof is elastically reduced, and the tip portion 21 is projected below the horizontal plate portion 2 to be elastically expanded so that the engaging portion 20 engages with the peripheral edge of the mounting hole 7. To meet. Therefore, when the cushion seat plate is to be removed again, the rear edge of the seat plate 8 is held by the hand and the dowel 15 is pulled out from the mounting hole 7 and then the seat plate 8 is shifted rearward to engage the engagement hole 1 It can be removed by removing the engagement between the hook 3 and the hook 5.

Reference numeral 30 denotes a cushion back which is attached to the front surface of the backrest plate portion 3, and the cushion backrest is a plate-like backrest made of the same elastic plastic as the seat plate 8. A cushion material 32 is arranged on the front surface of the plate 31, and the cushion material 32 is covered with a skin material 33, and the peripheral portion thereof is fixed to the back surface of the backrest plate 31 by a binding needle 34.

Further, two hooks 35, the tips of which are directed upward, are juxtaposed side by side near the upper edge of the front surface of the backrest plate portion 3. Reference numeral 36 denotes a hard elastic synthetic resin fixed to the front surface of the backrest plate portion 3 by inserting a protrusion 37 protruding from the front surface of the backrest portion 3 into a dovetail groove 38 formed on the lower surface thereof. In the engaging tip 36, a pair of elastic pieces 39 are formed in parallel with each other with a gap 40, and a wedge-shaped engaging portion 41 is formed on the outer surface of the tip end of the elastic piece 39. .

Further, an engaging hole 42 into which the hook 35 can be inserted is formed near the upper edge of the backrest plate 31, and stepped projecting surface portions 43 are formed on the upper edge of the engaging hole 42. Reference numeral 44 is a rectangular mounting hole formed in the back plate 31 so that the elastic piece 39 of the engaging tip 36 can be engaged.

When the cushion back 30 is attached to the back plate 3, first, the hook 35 is inserted into the engaging hole 42 and the cushion back 30 is slid downward so that the protruding surface 43 is attached. By engaging the hooks 35 and then pressing the backrest plate 31 against the backrest plate portion 3, the elastic piece 39 is inserted into the mounting hole 44 with its elasticity being contracted and projected into the backrest plate 31. Then, it is elastically expanded to engage with the inner peripheral edge of the engaging portion 41. For this reason, in order to remove the cushion backrest 30, the lower edge of the cushion backrest 30 is placed on the lower edge of the backrest plate 3, the backrest plate 3 is peeled off, and the elastic piece 39 is pulled out from the mounting hole 44. The hook 35 can be disengaged by sliding the plate 31 upward. In this way, the cushion back 30 can be easily attached and replaced, and even if the cushion back 30 is unnecessarily removed, it is possible to reduce unnecessary damage in public places that cannot be removed unless the above steps are taken. .

In this embodiment, a rearward hook 5 is formed on the upper surface of the horizontal plate portion 2. However, a frontward hook is formed on the lower surface of the seat plate 8, and the hook is attached to the horizontal plate portion 2. Similarly, the seat plate 8 can be detachably attached to the horizontal plate portion 2 by engaging with the engagement hole to be opened.

[0017]

[Effect of device]

 As described above, in the cushion seat plate mounting structure of the chair according to the present invention, the front edge of the seat plate is engaged with the rearward hook projecting near the front edge of the horizontal plate portion of the chair body. The advantage is that simply by lifting the front edge of the seat plate upward, the seat plate does not come off from the horizontal plate portion, and therefore the seat plate is less likely to be unnecessarily removed even when installed in a public place. There is. In addition, since the dowel on the bottom of the seat plate that can be expanded and contracted is fitted into the mounting hole that is opened from the center to the rear of the horizontal plate, there is no protrusion on the seat plate, so it can be used. It has various advantages such as a comfortable structure without giving a lumpy feel to the person's hips and a simple structure, which reduces the manufacturing cost.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a chair according to the present invention.

FIG. 2 is a partially enlarged perspective view of a horizontal plate portion of the chair body.

FIG. 3 is a partially enlarged perspective view of the lower surface of the seat plate.

FIG. 4 is an enlarged vertical cross-sectional view of a cushion seat plate.

FIG. 5 is an enlarged perspective view of an engagement tip.

FIG. 6 is a vertical cross-sectional view of a cushion backrest.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chair body 2 Horizontal flat plate part 3 Back plate part 5 Hook 7 Mounting hole 8 Seat plate 9 Cushion material 10 Skin material 13 Engagement hole 14 Lower surface part 15 Dowel 19 Elastic piece 20 Engagement part 21 Tip part 29 Through hole

Claims (1)

[Scope of utility model registration request] 1. A plurality of hooks, each of which has a front end facing rearward, are provided side by side on the front edge of the upper surface of the horizontal plate portion of the chair main body in a juxtaposed manner, and several hooks extend from the center of the horizontal plate portion toward the rear side. An attachment hole is opened, and an engaging hole for engaging the hook is opened near the front edge of the seat plate having a cushion material stretched on the upper surface, and the attachment hole is attachable to and detachable from the lower surface of the seat plate. A cushion seat plate mounting structure for a chair, characterized in that a dowel made of a hard elastic plastic having an expandable / contractible tip portion that can be fitted to the seat is provided.