JPH0130919Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is suitable for chairs, especially the seat of a rotating office chair.
The present invention relates to a resilient support used for a backrest, etc.

Conventional Technology and Issues The simplest elastic support for the seat or back of an office chair is a plate-shaped body made of plywood or metal plate, with a cushioning material such as sponge attached to the front or front side. This is covered with an exterior material such as cloth or a synthetic resin sheet. However, in this case, not only does it lack a solid appearance, but also the mounting members such as the backrest support rod and seat support member are directly exposed on the back side, resulting in an inferior appearance. In addition, the back side of the chair is completely covered with a synthetic resin cover.
For this reason, there are disadvantages such as requiring a separate cover and requiring time and effort to attach it during assembly, resulting in an increase in costs. In addition, there was a risk that the cover would break if it received an external impact.

The purpose of this invention is to provide a structure for resilient supports such as seats and backrests that has an excellent appearance and reduces the number of steps required to assemble a chair, while eliminating the above-mentioned drawbacks. do.

Means for Solving the Problems For the above purpose, this invention provides support substrate 7
and a resilient plate 9 attached to the front surface thereof in an overlapping manner, and the support substrate 7 is made of a hard synthetic resin substantially plate-shaped and provided with reinforcing ribs 10a on at least one side. A core plate 10, and an elastic foamed synthetic resin coating layer 11 having a skin layer on the surface formed by molding, which continuously covers a portion of the core plate 10 from the back side through the peripheral edge to the front side peripheral edge.
The gist of the present invention is to provide a resilient support for a chair, which is characterized by comprising:

Embodiments Hereinafter, embodiments of this invention will be described based on the drawings.

The illustrated chair 1 has leg portions 3 having five radial leg blades 3a with casters 2 attached to each tip.
The seat 5 is rotatably supported by the leg 3 via a column 4, and a backrest 5a is connected to the lower surface of the seat via a backrest support rod 6.

The elastic support according to this invention is used for the seat 5 and the backrest 5a,
Here, the specific structure of the backrest 5a will be explained using the backrest 5a as an example.

The backrest 5a is composed of a support substrate 7 and a resilient plate 9 detachably attached to the front surface of the support substrate 7 via four synthetic resin connectors 8.

Thus, the support substrate 7 has vertical and horizontal reinforcing ribs 10a on the front side, and has a recess 10b on the back side into which the upper end of the backrest support rod 6 is fitted, so that the entire front side is curved in a concave shape. A coating layer 11 made of a foamed synthetic resin such as foamed polyurethane is formed on a core plate 10 made of a molded hard synthetic resin by molding, that is, with the core plate 10 placed in a mold, the raw material components of the coating layer 11 are mixed. It is integrally coated by foaming and molding in a mold. The coating layer 11 has a skin layer on a surface that continuously covers substantially the entire rear surface, peripheral edge, and front peripheral edge of the core plate 10, and has a skin layer on the surface that continuously covers substantially the entire rear surface, peripheral edge, and front peripheral edge of the core plate 10. By connecting the back cover part 11a and the front cover part 11b through a large number of through holes 12 formed at required intervals along the core plate, the back cover part 11a and the front cover part 11b are prevented from peeling off from the core plate 10 even if an external force is applied.

On the other hand, the cushioning plate 9 is formed by storing a cushion material 9c between a hard synthetic resin hard plate 9a on the back side and a cloth cover 9b on the front side.
The two ends of the connector 8 are inserted into the four fitting holes 13, which are opened at the key points of a, and the corresponding fitting holes 14, which are wider on the inner back side, and which are provided on the front side of the core plate 10. By fitting the fitting shaft portions 8a, 8a, respectively, it is detachably attached to the support substrate 7. Note that the fitting shaft portions 8a, 8 at both ends of the connector 8
A has a split groove 15 along the axial direction of the cross shape, respectively.
is formed, and when the fittings are fitted into the fitting holes 13 and 14, the larger diameter end side is reduced in diameter due to its elasticity and restored after fitting to maintain a reliable connection state.

The seat 5, like the backrest 5a, has a structure in which a hard core plate is integrally coated with a foamed synthetic resin coating layer by molding.

In addition, in both the case of the backrest 5a and the seat 5, the core plate 10 of the supporting substrate 7 is provided with reinforcing ribs 1 on at least one side in order to provide sufficient strength.
0a, but the recess 10b may be provided as necessary.

Effects of the Invention The elastic support for a chair according to the invention consists of a combination of the support substrate 7 and the elastic plate 9 attached to the front surface of the support substrate 7 in an overlapping manner, as described above. However, a core plate 10 made of hard synthetic resin that is substantially plate-shaped with reinforcing ribs 10a on at least one side, and a continuous portion of the core plate 10 from the back side through the peripheral edge to the front side peripheral edge. and an elastic foamed synthetic resin coating layer 11 having a skin layer on the surface formed by molding. Therefore, the area from the back side to the peripheral edge of the support substrate is covered with a covering layer of elastic foamed synthetic resin, which gives it a good appearance, and there is no need to separately apply a cosmetic cover to it. In addition to the reinforcing ribs 10a that are essential for maintaining strength during the molding of the core plate, the base plate is optionally provided with recesses for fitting the required backrest support rods, and fitting holes for attaching the elastic plate. Since it can be manufactured and formed in advance, it is possible to reduce the number of man-hours when assembling the chair.
It is possible to assemble the backrest support rod etc. in a fitted state so that these mounting members do not protrude to the outside and have a good appearance. Furthermore, the supporting substrate can be easily manufactured by molding the core plate and the covering layer as an integral unit, and the elasticity of the covering layer prevents it from being easily damaged even if it receives an external impact, and the covering layer is not easily damaged. The presence of the layer has the advantage that it is possible to manufacture and provide a chair with a seat and backrest that gives a solid appearance and has a good appearance at a relatively low cost.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is a perspective view of the entire chair partially disassembled, Figure 2 is a partially cutaway perspective view of the backrest, Figure 3 is a sectional view taken along the - line in the assembled state of Figure 1, FIG. 4 is a perspective view of the connector. 1...Chair, 5...Seat, 5a...Backrest, 7
...Support board, 9...Bullet board, 10...Core board, 1
0a... Reinforcement rib, 10b... Recess, 11... Covering layer.

Claims (1)

[Scope of utility model registration request] A hard synthetic material consisting of a support substrate 7 and a resilient plate 9 attached to the front surface thereof in an overlapping manner, the support substrate 7 being substantially plate-shaped with reinforcing ribs 10a on at least one side. Resin core plate 1
0, and an elastic foamed synthetic resin coating layer 11 having a skin layer on the surface formed by molding and continuously covering the portion from the back side of the core plate 10 through the peripheral edge to the front side peripheral edge. An elastic support for a chair, which is characterized by: