JP2537859Y2 - folding chair - 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 chair, and more particularly to a connecting structure between a pipe constituting a leg and a seat.

[0002]

2. Description of the Related Art There are a wide variety of shapes and materials of chairs depending on the purpose of use, but one of the shapes often seen is one with a backrest and an armrest. Regarding the material, chairs referred to as pipe chairs whose legs are made of pipes are widely used in offices and hotels, and pipe chairs with armrests as shown in FIG. 4 are often used. I have.

[0003] In the pipe chair 50, in order to attach the armrest 54, a pipe extends from the front leg portion 56 a to above the stool portion 51 to form an armrest attachment portion 56 b, and a screw is attached to a side surface 52 a of the backrest portion 52. Stopped and fixed. However, the pipe chair 50 having such a configuration is used.
The side portion 52a of the backrest portion 52, that is, the seat 5
It is necessary that the shell 1 and the base 53 of the backrest 52 have a sufficient member thickness, so that there is a problem that the weight of the pipe chair 50 is inevitably increased.

If a chair lighter than the pipe chair 50 is desired, a pipe chair as shown in FIG. 5 can be used. In the pipe chair 60, the armrest attachment portion 66 extends from the front leg portion 66 a to above the stool portion 61.
The pipe forming b is cut in front of the backrest portion 62 and connected to the shell 63 by the joint 65. The joint 65 has an insertion portion on one side while being fixed to the shell 63 on the other side, and is attached to an end of a pipe constituting the armrest attachment portion 66b.

[0005]

However, in the pipe chair 60, after the joints 65 are fixed to one side and the other side of the shell 63, the insertion portion of the joint 65 and the pipe are held while the shell 63 is held. The end of the pipe is engaged on one side and the other side, and the insertion part is inserted. Therefore, the friction between the inner wall surface of the pipe and the insertion part is large, and the pipe is unstable, so it is difficult to install. There is a problem that work efficiency is poor.

[0006] In view of the above problems, the problem of the present invention is:
An object of the present invention is to provide a pipe chair that can be easily connected to a stool (shell) and a leg of the chair without increasing the weight of the pipe chair, and that has high working efficiency.

[0007]

In order to solve the above-mentioned problems, means taken in the present invention is to provide a pipe chair with at least one of a plurality of connecting portions between a leg portion constituted by a pipe and a seat portion. The two connecting portions are joints extending from the stool portion via the connecting portion, and on one side thereof, a mounting portion that can be mounted on an end of the pipe, and a screw hole formed in the mounting portion. And the joint is fixed to the pipe by a fixing screw.

Here, the screw hole formed in the mounting portion of the joint is substantially orthogonal to the axis of the mounting portion.
In addition, it is preferable that the screw hole penetrates the mounting portion.

In addition, the joint has a detent part with the pipe at the base end side of the mounting part, and the pipe is turned to a position corresponding to the detent part with the joint attached to the end part. It is preferable to have a stop engagement portion.

[0010]

In the pipe chair according to the present invention in which such means are provided, since the joint portion, which is the connecting portion between the stool portion and the leg portion, has a screw hole, the joint can be used alone by using a fixing screw. Can be fixed and positioned on the pipe, and thereafter, the connection between the stool and the joint can be performed. Therefore, the mounting portion of the joint can be easily mounted on the end of the pipe, and the working efficiency is good.

When the screw hole formed in the joint mounting portion is a through hole, the fixing screw can be screwed in from both ends of the screw hole, so that there is no restriction on the mounting direction of the fixing screw. So it is convenient.

Also, the joint has a detent part with the pipe at the base end side of the attachment part, and the pipe is turned to a position corresponding to the detent part with the joint attached to the end part. In the case of having the stop engagement portion, the screw hole and the through hole naturally engage at the stage when the joint is attached to the pipe, so that the fixing screw is easily screwed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A pipe chair according to an embodiment of the present invention will be described with reference to the accompanying drawings based on a procedure for assembling the components of the pipe chair.

FIG. 1 is a perspective view showing a pipe chair according to an embodiment of the present invention. FIG. 2 or FIG. 3 is an explanatory diagram showing a partially enlarged connection structure of a shell (stool) and a leg of the pipe chair shown in FIG. 1.

In these figures, a pipe chair 1 of the present embodiment is shown.
0 is a seat 11, a leg 16 composed of a pipe,
And an armrest 15 located on both sides of the seat 11. The seat 11 includes a seat 12 and a backrest 13, and a resin shell 14, which is a base portion (a frame of the seat 11), includes an area of the seat 12 and an area of the backrest 13. The seat member 11 a is fixed to the shell 14.

The leg 16 is formed integrally from a single pipe, and the front leg 16a extends obliquely forward from the side of the stool 12 and bends rearward at a portion in contact with the floor. I have. The leg 16 bent rearward at the contact portion between the front leg 16a and the floor is bent three times at an obtuse angle from the first front leg 16a to the second front leg 16a, and the floor 16 is bent. Are formed as rear leg portions 16b parallel to the rear legs.
The front leg portion 16a also extends above the seating portion 12, and its front end is bent toward the backrest portion 13 to form an armrest attachment portion 17. Further, a shell support 16c is provided from the first front leg 16a to the second front leg 16a. Here, the armrest mounting portion 17 has a cutout portion 19 at a distal end portion 17a, which is a cut surface of the pipe, and a through hole 18 at the distal end side, which penetrates from outside to inside of the pipe. The shell support 16c has through holes 29 on both the first front leg 16a side and the second front leg 16a side.

The seat portion 11 and the leg portion 16 are connected to each other by two engagement portions of the shell 14 and the shell support portion 16c and a joint 21.

The joint 21 is made of resin and has one side 21a.
From the other side to the other side 21b, and has a spatula shape whose thickness is small and wide. The joint 21 has a cylindrical insertion portion (attachment portion) 22 protruding laterally on one side of the one side 21a, and a metal core 23 as an iron bar at the center thereof. . An eave-shaped armrest holding portion 26 is formed at the end of the one side 21 a so that the front end surface and both side end surfaces extend toward the insertion portion 22. The insertion portion 22 has four grooves 22a in the axial direction of the insertion portion 22 formed on the side surface thereof, and a screw hole 24 that penetrates the insertion portion 22 substantially perpendicularly to the axis at the distal end side. At the base end side of the insertion portion 22, a rotation preventing portion 25 having a side surface protruding in a step-like shape is formed. A connecting portion 27 extends laterally on a side portion of the other side 21 b of the joint 21, and two through holes 28 are formed in the connecting portion 27. Here, the side portion where the insertion portion 22 is formed and the connection portion 27
Is a side portion facing the joint 21. In addition, in the pipe chair 10,
The joints 21 opposing each other on one side and the other side of the seat portion 11 are formed differently.

The joint 21 having such a structure is connected to the shell 14 (seat portion 11) at the connection portion 27 on the other side 21b, while being connected to the pipe end (leg portion 16) at one side 21a. ing. In the pipe chair 10 of the present embodiment, a joint 21 serving as a connecting portion between the seat 11 and the leg 16 is provided.
First, after the joint 21 and the pipe end are connected, the joint 21 and the shell 14 are connected.
The connection between the joint 21 and the pipe end (leg 16)
The distal end of the insertion portion 22 and the end 1 of the armrest attachment portion 17
7a and the insertion portion 22 is inserted into the pipe. Here, since the insertion portion 22 is formed to have a smaller diameter than the inner diameter of the pipe, there is no resistance such as friction at the time of insertion, so that the insertion portion 22 can be smoothly inserted and is easily attached. The rotation preventing portion 25 and the notch portion 19 of the joint 21 are formed to have a size that can be fitted to each other, and when they are in a fitted state, the screw hole 24 and the through hole 18 are engaged. The fixing screw 20 is screwed into the screw hole 24 through the through hole 18 so that the joint 21 and the pipe (the leg 1) are formed.
6).

Next, the connection portion 27 of the joint 21 and the shell 14 are connected. When the shell 14 is installed on the leg 16, the connecting portion 27 of the joint 21 abuts on the lower side of the back plate 14 b, which is the region of the shell 14 on the side of the backrest 13, and the lower side of the back plate 14 b The fixing screw 30 is screwed into the first fixing screw hole 30a formed at a position corresponding to the through hole 28 through the through hole 28, and the joint 2
1 and the shell 14 are connected. On the other hand, shell 14
A second fixing screw hole 31a is formed in the seat plate 14a, which is a region on the side of the stool portion 12, at a position where the second fixing screw hole 31a is engaged with the through hole 29 of the shell support portion 16c. The screw 31 is screwed into the shell support portion 16c and the shell 1
And 4.

With respect to the shell 14 and the leg 16 connected in this manner, a seat member 11a is fixed to the shell 14, and an armrest 15 is fixed to the armrest mounting portion 17, so that the pipe chair 10 of this embodiment is fixed. Is composed.

As described above, the pipe chair 10 according to the present embodiment
, The screw hole 2 is formed in the insertion portion 22 of the joint 21.
4, the joint 21 can be fixed and positioned independently to the pipe end (leg 16), and then the seat 1
The connection between the shell 14 as the base and the leg 16 may be performed, and the work of engaging the components of the pipe chair 10 is easy, so that the working efficiency is good. Further, since the joint 21 does not come off the pipe by the fixing screw 20, the insertion portion 22 of the joint 21 can be formed with a smaller diameter than the inner diameter of the pipe. The work to attach to the part is very easy.

The detent part 25 of the joint 21
The screw hole 24 and the through hole 18 are naturally engaged with each other by fitting the notch portion 19 with the notch portion 19.
And work efficiency is good.

[0024]

As described above, the pipe chair according to the present invention is characterized in that the joint has a screw hole at the attachment portion to the pipe as the leg. Therefore, the joint can be fixed and positioned independently on the pipe, and then the joint and the stool can be connected, and the work of engaging the components of the pipe chair is easy, resulting in good work efficiency. Also, since the joint does not come off the pipe by the fixing screw, if the insertion part of the joint is formed with a diameter smaller than the inner diameter of the pipe, the work of attaching the insertion part to the end of the pipe is easy This has the effect of being

Further, when the screw hole formed in the mounting portion of the joint is a through hole, the fixing screw can be screwed in from both ends of the screw hole, so that there is no restriction on the mounting direction of the fixing screw. Therefore, it is easy to use such as generalization of joints.

Further, the joint has a detent part with the pipe at the base end side of the mounting part, and the pipe is turned to a position corresponding to the detent part with the joint attached to the end part. In the case of having a stop engagement portion, the screw hole and the through-hole are naturally engaged with each other, so that the screw hole and the through-hole can be aligned in parallel with the joint mounting work, so that the working efficiency is improved. good.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a pipe chair according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a partially enlarged fixing structure of a joint in the pipe chair.

FIG. 3 is an explanatory view showing a partially enlarged structure of a connection between a shell and a leg in the pipe chair.

FIG. 4 is a perspective view showing an example of a conventional pipe chair.

FIG. 5 is a perspective view showing an example of a conventional pipe chair.

[Description of Signs] 10 ... pipe chair 11 ... seat 12 ... stool 13 ... backrest 14 ... shell 15 ... armrest 16 ... leg 17 ... · Armrest attachment part 21 ··· Joint 22 · · · Insertion part 23 · · · Core bar 24 · · · Screw hole 25 · · · Detent part 26 · · · Armrest holding part 27 · · · Connection part 28 · · ·・ Through hole

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Practical application Microfilm (JP, U) photographing the specification attached to the application form of Japanese Patent Application No. 1-60863 (Japanese Utility Model Application No. 3-849) and the drawings.

Claims (2)

(57) [Scope of request for utility model registration] At least one connecting portion of a plurality of connecting portions between a leg portion and a stool portion composed of a pipe is a joint extending from the stool portion via a connecting portion, The joint has a mounting portion fitted inside the end of the pipe, and a screw hole formed in the mounting portion in a direction substantially orthogonal to the axial direction of the mounting portion, and the mounting portion is provided on the pipe. The fitting is fixed to the pipe by a fixing screw screwed into the screw hole through the pipe while being fitted inside the end , and the joint is attached to the joint at the base end side of the mounting portion.
The pipe has a detent portion, and the pipe has an end portion.
With the joint attached to the detent
That it has a detent engaging part at a position corresponding to the part
Characterized pipe chair. 2. The pipe chair according to claim 1, wherein the screw hole is a through screw hole passing through the mounting portion from a direction substantially orthogonal to an axis of the mounting portion.