JPH0349551Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a chair seat that is used in a manner in which crossbars are attached to the sides thereof.

[Conventional technology]

Conventionally, this type of chair seat has been constructed by attaching a seat frame to the periphery of the lower surface of a plywood top plate, and covering the front, rear, and upper surfaces of the seat with cushioning material in between. It has been known. The seat frame is provided to prevent deformation of the top plate and ensure shape retention of the entire seat. Therefore, a shape that cannot be easily deformed is adopted.

[Problem that the invention attempts to solve]

However, it is difficult to use a seat configured in this manner by deforming it into a shape other than the originally designed shape. Therefore, for example, if you want a shape with a bulging top surface or a concave top surface, you have to design and manufacture each type of shape separately, which is a hassle. .

The present invention aims to solve such problems easily and reliably.

[Means for solving problems]

In order to achieve these objectives, this invention
The following configuration is adopted.

That is, the chair seat according to the present invention has a horizontal bar attached to its side, and includes a deformable top plate, a seat frame attached to the lower peripheral edge of the top plate, and a seat frame attached to the lower peripheral edge of the top plate. The seat frame is provided with notches that open downward and are provided on both sides of the seat frame to facilitate deformation of the seat frame, and the both sides of the seat frame are fastened to the crossbars via fasteners. This is a chair seat that is characterized by the fact that it is shaped like this.

[Effect]

According to such a configuration, the presence of the notch allows the both sides of the seat frame to be deformed in the vertical direction within a relatively large angular range. Therefore,
Coupled with the fact that the top plate is deformable, it is also easy to make the entire seat into a shape with a bulging top surface, or conversely, a shape with a concave top surface. Then, when the seat frame is deformed into the desired shape, if both sides of the seat frame are fastened to the crosspieces using fasteners such as bolts, the crosspieces will also serve as reinforcing materials for the seat. The shape of the seat will be maintained over a long period of time.

〔Example〕

Hereinafter, an embodiment in which the present invention is applied to the seat of a learning chair will be described with reference to the drawings.

The chair shown in FIG. 1 has a support 3 erected on the base 2 of the leg 1, a seat 4 supported at the upper end of the support 3, and crossbars 5 attached to both sides 4b of the seat 4. A backrest 6 is provided between the upper ends of these crossbars 5.

More specifically, the leg 1 includes a pair of support columns 3 erected on both sides of the upper surface of the base portion 2 . The column 3 is a telescopically slidable combination of an inner column member 31 and an outer column member 32, and a mounting bracket 33 is fixed to the lower end of the inner column member 31, and the outer column member 32 A seat bracket 34 with an L-shaped cross section on the upper end
are fixed to each other, and a horizontal member 7 is installed between the upper ends of the outer column members 32. In this embodiment, an elevating position adjustment mechanism (not shown) for changing the vertical relative positions of the inner column member 31 and the outer column member 32 is built into the column 3, and the horizontal A transmission mechanism (not shown) for raising and lowering the seat 4 by transmitting the rotational operating force applied to the operating handle 8 to the lifting position adjustment mechanism is housed inside the frame member 7 .

The seat 4 is constructed by attaching a wooden seat frame 42 to the lower peripheral edge of a deformable plywood top plate 41, and a cushion material (not shown) is attached to the outside of the top plate 41 and the seat frame 42. A covering material 43 is stretched through the opening. The seat frame 42 includes a front portion 42a, a back portion 42b,
It is a frame-shaped thing consisting of both side parts 42c. A cutout portion 44 that opens downward is provided in the middle portion of both side portions 42c of the seat frame 42. This notch 44 is formed by partially removing the seat frame material, and the end of the horizontal member 7 is loosely fitted into this notch 44.

Both sides 42c of the seat frame 42 of the seat 4 are fastened to the crossbar 5 by screw members 51 serving as fasteners. That is, as shown in FIG. 2, a bolt hole 45 is bored in the seat frame 42 of the seat 4, and an insert nut (not shown) is embedded in a portion of the horizontal bar 5 corresponding to the bolt hole 45. The crosspiece 5 and the seat 4 are tightly connected to each other by passing the screw member 52 through the bolt hole 45, screwing it into the insert nut, and tightening it.

After the seat 4 and the crosspiece 5 are joined in this manner, the seat 4 is fixed to the support column 3 with a screw member 46. That is, the mounting bracket 34 fixed to the upper end of the support column 3 is attached to the seat frame 42 of the seat 4.
It has an L-shaped cross section along the lower and inner surfaces of the seat frame 42, and a bolt hole 35 is provided at a portion opposing the inner surface of the seat frame 42. The support column 3 and the seat 4 are connected by passing a screw member 46 through the bolt hole 35 and screwing it into the seat frame 42.

With the seat 4 having such a configuration, the presence of the notch 44 allows the both sides 42c of the seat frame 42 to be deformed in the vertical direction within a relatively large angular range. Therefore, in addition to the fact that the top plate 41 is deformable, it is also easy to make the entire seat 4 into a shape in which the upper surface 4a is bulged or, conversely, in a recessed shape. FIG. 3a shows a state in which the seat 4 is fastened to the crosspiece 5 in a planar shape, and the third
Figure b shows a configuration in which the seat 4 is deformed so that the upper surface 4a is swollen and fixed to the crosspiece 5, and Figure 3c shows
A configuration is shown in which the seat 4 is fastened to the crosspiece 5 with the upper surface 4a recessed. In this way, both sides 42c of the seat frame 42 are deformed into a desired shape.
If it is fastened to the crosspiece 5 with the screw member 46, the crosspiece 5 will also serve as a reinforcing material for the seat 4, and the shape of the seat 4 will be maintained over a long period of time. In other words, in this type of structure, the crossbars 5 also take on the reinforcing function that should be assumed by the both sides 42c of the seat frame 42, so cutouts 44 are provided in both sides 42c of the seat frame 42. However, it is possible to design the structure so that no strength problems arise.

Therefore, with this type of seat, the single seat 4 can be set in various shapes and assembled into chairs as appropriate, which makes it possible to design and manufacture seats of various shapes individually. Compared to this, the man-hours can be significantly reduced.

Note that the chair to which the present invention is applied is not limited to a chair for learning, but may be, for example, a chair for office use. Furthermore, the present invention is equally applicable to chairs without backrests.

Further, the depth of the notch does not have to be the same as the vertical dimension of the seat frame, and can be set to a smaller value without departing from the spirit of the present invention.

[Effect of idea]

Since the present invention has the above-mentioned configuration, it can be assembled into a chair by freely selecting a planar shape, a shape with a bulging top surface, or a shape with a concave top surface, and can be assembled into a chair in a variety of ways. It is possible to provide an excellent seat that can significantly reduce the man-hours required for design and manufacturing to meet the specifications of the product.

Moreover, since the crossbars can be effectively utilized to reinforce both sides of the seat frame, it is possible to prevent the inconvenience of the strength and shape retention of the seat being impaired due to the provision of the notch.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an overall perspective view, FIG. 2 is an exploded perspective view of the seat observed from the back, and FIGS. 3 a, b, and c show how the seat is assembled. FIG. 2 is a schematic side sectional view. 4...Seat, 4a...Top surface, 4b...Side surface, 5...
...Hanging board, 41...Top plate, 42...Seat frame, 42a...
... Side part, 44 ... Notch part, 51 ... Fastener (screw member).

Claims (1)

[Scope of utility model registration request] A chair seat with crossbars attached to its sides, which includes a deformable top plate, a seat frame attached to the lower peripheral edge of the top plate, and a seat frame that opens downward on both sides of the seat frame. a notch provided in the seat frame to facilitate deformation of the seat frame, and both sides of the seat frame are fastened to the crossbars via fasteners. seat.