JP2544494Y2 - Pipe Chair Pipe Fitting - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe fitting for a pipe chair for fitting a lower end of an upper body pipe and an upper end of a rear leg pipe above and below a seat.

[0002]

2. Description of the Related Art Generally, when connecting pipes, a method of fitting the pipes with high precision by shrink fitting or reaming requires a lot of man-hours. Therefore, as shown in FIG. It is well-known that a ring-shaped resin 47 having irregularities on its surface is mounted around the upper and lower cylindrical pipe fitting rods 46 and a pipe 48 is fitted around the ring-shaped resin 47.

[0003]

However, even if the looseness due to the fitting is eliminated by the elasticity of the resin,
Depending on the magnitude of the load, the resin may be damaged.
On the other hand, even in a pipe chair, when such a pipe fitting is used to connect the upper body pipe and the leg pipe above and below the seating portion, on-site assembly becomes possible, and the packing form becomes compact. The invention is therefore based on the object of providing a robust pipe fitting of a pipe chair of the kind mentioned at the outset.

[0004]

SUMMARY OF THE INVENTION In order to achieve this object, the present invention provides an upper and lower back leg leg pipe which is tilted forward and backward, above and below a support member for supporting a side portion of a seating portion. A pipe fitting for a pipe chair for fitting a lower end of an upper body pipe that recedes to form a pipe fitting,
Pipe receiving surfaces are formed on the upper and lower sides of the support member to abut the pipe end faces, and pipe fitting rods that are eccentric so as to make contact with the inner surface of the pipe on the front side of the chair and to be separated on the rear side are attached to each pipe. The pipe is provided so as to protrude from the receiving surface, and a recess is formed on the rear side of the pipe fitting rod, and an elastic body that is pressed against the inner surface of the pipe is fitted into the recess.

[0005]

In the pipe chair, the lower end of the upper body pipe and the upper end of the rear leg pipe are fitted to the upper and lower pipe fitting rods of the support member so that the elastic body thereof is compressed to reach the pipe receiving surface. Assembled. When a person sits on a chair, a load is applied to the rear leg pipe which has been moved forward by sitting down, and to both the rear leg and the upper body pipe due to the elbow rest or the back rest of the upper body pipe. At this time, the pipe fitting rod directly abuts on the inner surface of the pipe to which a relatively large load is applied by moving forward, and the load on the outer elastic body can be relatively small.

[0006]

1 to 3 show a pipe fitting of a pipe chair according to an embodiment of the present invention. In this chair, as shown in FIG. 3, a front leg pipe 2 inclined backward is fixed in a triangular shape to a rear leg pipe 1 inclined forward, and the rear leg pipe, an elbow pad 3c and a back pad 3b are connected to each other. The upper pipe 3 provided is fitted to a pipe fitting 10 formed by projecting pipe fitting rods 12 above and below a horizontal cylindrical hinge portion 11 as a support member for the seating portion 4. I have.
Reference numeral 5 denotes a reinforcing rod having a guide and stopper function at the time of horizontal stacking. 6 is a reinforcing bar.

As shown in FIG. 1, each pipe fitting rod 12 has a symmetrical structure, and is formed integrally with a base 21 and a fitting rod main body 23. The base 21 has the same outer diameter as the rear leg pipe 1 and the upper body pipe 3, and has a pipe end face 1.
The pipe receiving surface 22 for abutting a and 3a is formed around the distal end portion. The fitting rod main body 23 is eccentric with a relatively small outer diameter so as to contact the inner surface of the pipe on the front side of the chair and separate from the rear side of the chair.
Projecting from. The recess 2 is provided on the rear side of the fitting rod main body 23.
4 and an arcuate surface 2 having a length corresponding to the concave portion and an inner diameter of the rear leg pipe 1 and the upper body pipe 3.
5b, and an elastic body 25 having a thickness to be pressed against the inner surface of the pipe is fitted. This elastic body is made of a synthetic resin so as to exhibit a slight elasticity, and the surface thereof is formed with unevenness 25a which bends when the pipe is fitted. This allows the synthetic resin to fit smoothly without lowering its hardness.

As shown in FIG. 2, the hinge portion 11 includes a horizontal pipe 30, a hinge shaft 31 inserted into the pipe, a collar 32 set around a base end 31a thereof, and seats on both sides. Fixed to the pipe 4a,
And a collar 35 attached around the cylindrical hinged portion 28 having a receiving hole 28a into which the hinge shaft 31 is fitted.
And a compression spring 36. And FIG.
As shown in B, the hinge shaft 31 is inserted into the pipe 30, the flange portion 31 b of the base end portion 31 a contacts the collar 32, and is urged inward by the compression spring 36. The distal end portion is fixed to the hinged portion 28 with the screw 39 while being fitted in the receiving hole 28a. As a result, the seat pipe 4a is fixed to the hinge shaft 31,
It becomes rotatable with respect to the pipe 30 via the collars 35 and 32, and the seating position is regulated by stoppers 30a and 30b inside the pipe 30.
c for the stacking within the range of c.
Is rotatable.

With the chair structure thus constructed, the front leg and rear leg pipes 1 and 2 and the upper body pipe 3
And the seating part 4 with the pipe fitting 10. At the time of use, the elastic body 25 is elastically compressed into the upper and lower fitting rod main bodies 23 of the pipe fitting 10 so that the rear leg pipe 1 and the upper body pipe 3 are fitted, and the pipes are easily brought into contact with the pipe receiving surface 22. Can be assembled. In the use state, in the pipe fitting rod 12 which has been tilted forward and downward, the upper and lower fitting rod bodies 23 are in direct contact with the inner surface on the front side of the chair to which a greater load is applied to the rear leg pipe 1 and the upper body pipe 3, thereby being robust. Provide support. On the other hand, the elastic body 25 located on the rear side of the chair can be prevented from being broken because the load is small.

In the above-described embodiment, when the pipe 30 is a square pipe, or when the pipe 30 has flat surfaces on the upper and lower surfaces, the pipe fitting rod 12 can be directly connected to the pipe by eliminating the cylindrical base 21. A receiving surface can also be formed. The present invention can be applied to a case where the support member does not hinge the seat portion but simply fixes the seat portion.

[0011]

As described above, by providing the seat fitting with the pipe fitting according to the present invention, the separated leg pipe and upper body pipe can be easily assembled as a pipe chair. The strength of the assembled portion with respect to the load when seated can be sufficiently ensured by the post-position of the elastic body.

[Brief description of the drawings]

1 shows a pipe fitting according to an embodiment of the present invention; FIG. 1A is a longitudinal sectional view of a main part, FIG. 1B is a transverse sectional view, and FIG. 1C is a perspective view.

2A and 2B show a hinge portion of the pipe fitting, and FIG. 2A is an exploded perspective view, and FIG. 2B is a sectional view in an assembled state.

FIG. 3 is a perspective view of a pipe chair provided with the pipe fitting.

FIG. 4 is a sectional view of a conventional pipe fitting.

[Explanation of symbols]

 Reference Signs List 1 rear leg pipe 2 front leg pipe 3 upper body pipe 3c elbow pad 10 pipe fitting 11 hinge part 12 pipe fitting rod 22 pipe receiving surface 23 fitting rod body 24 recess 25 elastic body

Claims (1)

(57) [Scope of request for utility model registration] 1. An upper end portion of a rear leg pipe that has been tilted forward and a lower end portion of a body pipe that retreats so as to form a backrest after the tilting, above and below a support member that supports the side portion of the seating portion. A pipe fitting for a pipe chair for mating,
Pipe receiving surfaces are formed on the upper and lower sides of the support member, the pipe receiving surfaces contacting the pipe end surfaces, and the pipe fitting rods are eccentric so as to be in contact with the inner surface of the pipe on the front side of the chair and to be separated on the rear side. The pipe fitting of a pipe chair is characterized in that a protrusion is formed from each of the pipe receiving surfaces, a recess is formed on the rear side of the pipe fitting rod, and an elastic body that presses against the inner surface of the pipe is fitted into the recess. Utensils.