JPH0230998Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a chair in which a seat and a backrest are formed by stretching a belt or cloth over a frame of an appropriate shape.

(Prior Art) Generally, as a chair in which a seat and a backrest are formed using a belt or the like, a chair having a structure shown in FIG. 7 is known. A flexible plastic belt 14 is stretched to form a seat and a backrest, and legs 15 are fixed to the seat frame 13.

As shown in FIG. 8, the chair is constructed by wrapping one end of the belt 14 around the frame 13, sewing the end edge 16 to the back of the belt 14, and then attaching the belt 14 to the frame 13.
4 by wrapping the other end of the belt 14 around the frame 13 and sewing the end edge to the back side of the belt 14, or by wrapping one end of the belt 14 around the frame 13 as shown in FIG. The belts 14 are each tensioned on the frame 13 by fixing them with screws 17, and then wrapping the other end of the belt 14 around the frame 13 and fixing them with machine screws 17.

However, in the chair, the belt 14 must be tensioned, so if one end of the belt 14 is attached to the frame 13 and then the other end of the belt 14 is attached to the frame 13, the other end of the belt 14 is The disadvantage is that it is extremely difficult to attach to the frame. Furthermore, since the belt 14 is attached to the frame 13 by sewing 16 or using small screws 17, there is also the problem that the belt 14 cannot be attached to the frame 13 easily and easily. . As a result, it takes time to assemble the chair, and
Work efficiency will also drop significantly.

(Problems to be solved by the invention) The present invention was devised to solve the above-mentioned problems, and its purpose is to provide a chair in which belts and cloths can be easily and easily attached to the frame. There is something to do.

(Means for Solving the Problems) The chair of the present invention is a chair in which a seat is formed by stretching narrow belts at predetermined intervals on a frame of an appropriate shape. frame,
The belt is formed by extrusion into a tubular material in which a locking groove with a notch and a cross section approximately in the shape of an inverted U is formed in the axial direction, and the cross section having a constant width at both ends of the belt is approximately horizontal The basic structure of the invention is that a plurality of belts are stretched between both frames at regular intervals by fixing the letter-shaped fixtures and connecting and locking the fixtures into the locking grooves. That is.

(Function) In the chair, the belt or cloth is stretched around the frame by fixing attachments to both ends of the belt or cloth and inserting the attachments into the locking grooves of the frame.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

1 and 2 are a front view and a right side view of a chair according to a first embodiment of the present invention, in which 1 is a frame, 2 is a belt, 3 is a leg, and 4 is a connecting member.

As shown in FIG. 4, the frame 1 includes left and right circular pipes 1a bent into a substantially L-shaped side surface.
and a reinforcing member 1b for connecting the two, which are made of light alloy such as aluminum alloy, plastic, or the like. Furthermore, locking grooves 5 are formed in the left and right circular pipes 1a along the axial direction. That is, in this embodiment, the circular pipe 1a
As shown in Figure 3, a double-structured pipe manufactured by extrusion is used, in which the outer pipe is notched along the axial direction, and a portion of the outer pipe and inner pipe are connected. It's getting old. Therefore, the locking groove 5 is formed in the circular pipe 1a along the axial direction. Note that the width of the notch 6 formed in the outer pipe is selected to be smaller than the inner diameter of the inner pipe.

The belt 2 is made of flexible plastic, and has fittings 7 on both ends thereof that are inserted into the locking grooves 5 of the frame 1 and prevented from coming off.

As shown in FIG. 5, the fixture 7 is made of a light alloy such as an aluminum alloy and has a U-shaped cross section, and is attached to both ends of the belt 2 by caulking 8. The length L of the fixture 7 is the length of the belt 2.
The length is selected to be longer than the width. Also, the mounting tool 7
The thickness H is selected to be such that the fitting 7 can be inserted into the locking groove 5 from the notch 6 of the outer pipe.

When the belts 2 are stretched around the frame 1, the fittings 7 are fixed to both ends of each belt 2, and each fitting 7 is inserted into the locking groove 5 from the notch 6 of the outer pipe. insert. In addition, the notch 6 of the outer pipe
Because the width of the inner pipe was selected to be larger than the inner diameter of the inner pipe, after the fitting 7 is inserted into the locking groove 5, the fitting 7 is caught on the outer pipe as shown in FIG.
You can't get out of it. Also, belt 2 and belt 2
The gap is well adjusted by the length L of the fitting 7. Furthermore, since the circular pipe 1a has a double structure, it will not deform even if a large load is applied to it.

After inserting the fixture 7 into the locking groove 5, caps 9 made of plastic or the like are fitted onto both ends of the circular pipe 1a to prevent the fixture 7 from moving in the axial direction.

In the above embodiment, a circular pipe 1a with a double structure was used for the frame 1, but in other embodiments, a double structure elliptical pipe 1a was used as shown in FIG. Alternatively, although not shown, a square pipe having a locking groove, a solid round bar, a square rod, etc. having a locking groove may be used.

Further, in the above embodiment, the thickness of the fitting 7 was selected to be such that it could be inserted into the locking groove 5 from the notch 6 of the outer pipe, but in other embodiments, the thickness of the fitting 7 The thickness may be selected to be slightly larger than the width of the notch 6. In this case, the fitting 7 is inserted into the locking groove 5 from the end opening of the circular pipe 1a.

Furthermore, the materials, shapes, etc. of the frame 1, belt 2, and fixture 7 are not limited to those in the above embodiments, and may be arbitrary.

(Effect of the invention) As mentioned above, the chair of the invention has a locking groove formed in the frame along the axial direction, and a belt or cloth is inserted into the locking groove of the frame at both ends to prevent it from coming off. Since the structure is provided with a tool, the belt or cloth can be stretched on the frame simply by inserting the mounting tool into the locking groove of the frame, and the belt or the like can be easily and conveniently attached to the frame. As a result, the chair can be assembled easily and work efficiency can be improved.

In addition, in the present invention, since the fittings having a fixed width L fixed to the end of the belt are locked in the locking groove in a state in which they are connected to each other, the width L of the fittings is The belts can be stretched in parallel at regular intervals accurately and easily.

[Brief explanation of the drawing]

FIG. 1 is a front view of a chair according to the first embodiment of the present invention, FIG. 2 is a right side view, FIG. 3 is an enlarged sectional view taken along the - line in FIG. 2, and FIG. 4 is a perspective view of the frame. FIG. 5 is a partial perspective view of a belt provided with an attachment, FIG. 6 is a sectional view showing another embodiment of the frame, FIG. 7 is a perspective view of a conventional chair, and FIG.
FIG. 9 is an enlarged sectional view taken along the line X--X in the figure, and FIG. 9 is an enlarged sectional view of the frame and belt attachment portion showing another conventional example. 1 is a frame, 2 is a belt, 5 is a locking groove, 7 is a mounting tool, and 10 is a cross.

Claims (1)

[Scope of utility model registration request] In a chair in which a seat is formed by stretching narrow belts 2 at predetermined intervals on a frame 1 of an appropriate shape, the frame 1 is extruded so that its interior has a cross section approximately The belt 2 is molded from a tube material in which a locking groove 5 having a notch 6 is formed in the axial direction, and metal fixtures 7 having a constant width L are fixed to both ends of the belt 2,
A chair characterized in that a plurality of belts 2 are stretched between the frames 1 at regular intervals by connecting and locking the fixtures 7 into the locking grooves 5.