JP2848275B2 - Frame joining mechanism with welds - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame joining mechanism suitably used for joining legs on a chair or a table.

[0002]

2. Description of the Related Art Conventionally, pillars in chairs and tables,
As a frame joining mechanism used for joining a support, a horizontal member, and the like, for example, a frame joining mechanism in which end surfaces of first and second frames are attached to each other and fixed by welding all around is known. . There is also known a structure in which a reinforcing member is attached to the first and second frames from the outer side and fixed to the two frames.

[0003]

However, such a frame joining mechanism having such a structure has disadvantages in durability and appearance.

[0004] That is, the former joining mechanism by full-circumferential welding not only tends to cause insufficient strength due to poor welding and has poor durability, but also improves the joining strength despite the fact that the welded portion is exposed in appearance. In addition, the welded portion must be excessively large, which is not preferable in appearance. In addition, in the case of a joining mechanism via a reinforcing member attached to the outer surface of the latter, although high joining strength is obtained and durability is not insufficient, the design is restricted because the reinforcing member is exposed in appearance.

[0005] An object of the present invention is to solve these problems effectively.

[0006]

In order to achieve the above object, the present invention employs the following configuration.

That is, a frame joining mechanism having a weld according to the present invention has a first end provided with an opening at an end face.
Frame, and a second frame having an opening at an end face, a frame joining mechanism having a welded portion connecting the both end faces via a reinforcing member disposed at the both openings. And a first arm of the reinforcing member is provided on the first arm.
Enters the opening of the frame and welds to the inner surface of the opening
A second arm portion of the reinforcing member enters the opening of the second frame and is attached to the inner surface of the opening, and the first and second arms are attached to the inner surface of the opening. The end faces of the frame are fixed via a weld .

[0008] In a specific embodiment, the first and second frames are formed by welding around the entire circumference.
The thing joined through the contact part can be mentioned.

[0009]

According to a frame joining mechanism having a welded portion having such a configuration, joining is performed via the reinforcing member, so that joining strength and durability can be improved, and the present invention is applied to a portion where joining strength is required. Not only can the reinforcing member be visually recognized, the degree of freedom in design can be improved.

In particular, according to the present invention, one arm portion of the reinforcing member is provided.
Is rigidly connected to one frame via a weld,
The reinforcing member can be firmly positioned and fixed.
The joint strength by effectively using the reinforcing effect of the material
Good quality. Moreover, the reinforcing member
Is welded to only one frame,
The end faces of the first and second frames are joined by welding.
Despite doing so, the reinforcing members installed inside
The stiffening operation can be easily performed. Also,
If the reinforcing member is welded to the first frame, the reinforcing portion
The material is welded by bringing the second frame into contact with the first frame
To serve as a positioning jig for
Therefore, it is not necessary to arrange a special jig outside.

[0011]

1 to 4 show an embodiment in which the present invention is applied to a table.

As shown in FIG. 1, the table has a top plate 2 supported by left and right legs 1.

The left and right legs 1 are connected to a first frame, a first frame.
Is joined to a pillar 12 as a second frame. The first horizontal member 11 is a hollow pipe member having an elliptical cross section. The pillar 12 is a hollow pipe material having an elliptical cross section whose cross-sectional shape is substantially equal to that of the first horizontal member 11,
It is disposed on the floor via a semicircular leg base 121 rigidly connected to the lower end. The left and right legs 1 are connected to each other via a cylindrical pipe-shaped second horizontal member 13 so as to be self-supporting.

The top plate 2 comprises a rectangular top plate main body 21,
As shown in FIG. 2, the leg 1 is connected to and supported by the first horizontal member 11 of the leg 1 via a top plate connecting member 22. The top plate body 21 is made of plywood and has a decorative plate attached to the surface to improve the appearance.

In this embodiment, as shown in FIGS. 3 and 4, the left and right end surfaces 11a of the first horizontal member 11 and the upper end surface 12a of the pillar 12 are joined to each other by a frame. Joining is performed via the mechanism 3. The frame joining mechanism 3 is connected to the end surface 1 of the first horizontal member 11 via the reinforcing member 4.
1a and the upper end surface 12a of the pillar 12 are connected and joined.

The reinforcing member 4 is a substantially L-shaped flat metal plate, and the first arm portion 41 is provided on the end surface 11 a of the first horizontal member 11.
And the second arm 42 enters the opening 122 of the upper end surface 12a of the pillar 12 and is attached to the inner surface 122a.

The joining of the first horizontal member 11 and the pillar 12 by the frame joining mechanism 3 is performed as follows.
First, the first arm 41 of the reinforcing member 4 is connected to the first horizontal member 11.
Into the opening 111, and the inner surface 1 of the opening 111
A welding portion 31 is formed and fixed by arc welding or the like attached to 11a. Next, as shown by an arrow in FIG. 4, the second arm 42 of the reinforcing member 4 is caused to enter the opening 122 of the pillar 12, An end surface 11a of the frame 11 and an upper end surface 12a of the pillar 12 are additionally provided. Lastly, a welded portion 32 is formed on the outer periphery of the end surface 11a of the first transverse member 11 and the outer periphery of the upper end surface 12a of the pillar 12 by welding all around, and the first transverse member 11 and the pillar 12 are formed.
And join.

With the frame joining mechanism 3 having such a configuration, the joining strength and durability can be improved because of the interposition of the reinforcing member 4, and the frame joining mechanism 3 can be applied to a portion where the joining strength is required. In addition, since the reinforcing member 4 is not visually recognized in appearance, the degree of freedom in design can be improved. In addition, it is not necessary to make the joining portion 32 exposed in appearance excessive, and the appearance can be improved.

As shown in FIG. 5, the first horizontal member 1
The frame joining mechanism 3 may be further reinforced by attaching and fixing the second reinforcing member 5 from the outer surface to the column 1 and the pillar 12. In this embodiment, both end surfaces of the second horizontal member 13 are connected to and supported by the second reinforcing member 5.

As another embodiment, as shown in FIG. 6, the present invention is applied to a chair.

This chair comprises a backrest 7 with left and right legs 6.
It is to support.

The leg 6 is formed by joining a handrail 61 serving as a first frame having an arc shape, a front leg 62 serving as a second frame, and a rear leg 63 serving as a second frame. Horizontal material 6
Reference numeral 1 denotes a hollow pipe member having an elliptical cross section, which supports a handrail 612 via a handrail connecting member 611 as shown in FIG. Each of the front leg 62 and the rear leg 63 is a hollow pipe member having an elliptical cross-section having substantially the same cross-sectional shape as the horizontal member 61, and semicircular leg bases 621 and 63 rigidly connected to the lower ends.
1 are provided on the floor via the respective 1s. In the horizontal member 61, a back seat 7 is fixed from the left and right through a bolt insertion hole (not shown) in the left-right direction and a bolt (not shown) inserted into the bolt insertion hole.

The back seat 7 is formed by disposing a cushion 72 on the upper surface of a pipe frame 71. The pipe frame 71 connects the left and right side pipes 711 with a horizontal pipe 712, and a cloth tape (not shown) is stretched between the side pipes 711 and the horizontal pipe 712, and the load is supported by the cloth tape. It is configured as follows. The side pipe 711 is provided with a bolt engaging hole (not shown) corresponding to the bolt insertion hole of the leg 6, and is fixed to the leg 6 via the bolt. Cushion 72
Is a cushion material covered with an upholstery.

In the chair having the above-described structure, in this embodiment, as shown in FIG. 8, a front end face 61a of the horizontal member 61 and an upper end face 62a of the front leg 62 are provided with a frame joining mechanism provided with the reinforcing member 4. 3 are joined. The joining of the horizontal member 61 and the front leg 62 by the frame joining mechanism 3 is performed as follows. First, the first arm portion 41 of the reinforcing member 4 is made to enter the opening 613 of the horizontal member 61 and attached to the inner surface 613a, and the welded portion 31 is formed and fixed by arc welding or the like. Next, the second arm 42 of the reinforcing member 4 is connected to the front leg 62.
The front end face 61 a of the horizontal member 61 and the upper end face 62 of the front leg 62 are inserted into the opening 622 of the
and a. Finally, the outer periphery of the front end surface 61a of the horizontal member 61 and the outer periphery of the upper end surface 62a of the front leg 62 are entirely welded to form a weld 3
2 is formed, and the horizontal member 61 and the front leg 62 are joined.

As shown in FIG. 9, the rear end face 61b of the horizontal member 61 and the upper end face 63a of the rear leg 63 are also joined via the frame joining mechanism 3 including the reinforcing member 4 in the same manner. The horizontal member 61 and the rear leg 6 by the frame joining mechanism 3
Joining with No. 3 is performed as follows. First, the reinforcing member 4
After the first arm 41 is inserted into the opening 614 of the horizontal member 61 and attached to the inner surface 614a, the welded portion 31 is formed and fixed by arc welding or the like. Next, the second arm portion 42 of the reinforcing member 4 enters the opening 632 of the rear leg 63 and is attached to the side surface 632a, and the rear end surface 61b of the horizontal member 61 and the upper end surface 63a of the rear leg 63 are separated. Attached. Finally, the rear end surface 61b of the horizontal member 61 and the upper end surface 63 of the rear leg 63
a to form a weld 32 by welding the entire circumference of
1 and the rear leg 63 are joined.

In the frame joining mechanism 3 having such a configuration, the same operation and effect as those of the above embodiment can be obtained.

Further, as shown in FIG. 10, the second reinforcing member 5 is attached to the lateral member 61 and the front leg 62 and the lateral member 61 and the rear leg 63 from the outer side and fixed. The frame joining mechanism 3 may be further reinforced. In this embodiment, the pipe frame 7 of the back seat 7 is attached to the second reinforcing member 5.
Both ends of one horizontal pipe 712 are connected and supported.

The configuration according to the present invention is not limited to the above-described configuration. For example, the present invention can be applied to joining frames other than tables and chairs. Further, the present invention can be applied to joining frames having an arbitrary cross-sectional shape. In addition, various settings can be made without departing from the present invention.

[0029]

The frame joining mechanism according to the present invention has one feature.
High joint strength is ensured because the frames are joined to each other via a reinforcing member rigidly connected to the other frame via a weld
In addition to the above, the reinforcing member is not visually recognized in appearance, so that the degree of freedom in design can be improved. Moreover, the reinforcing member is attached to one frame.
Only the frames are welded, so the frames
Despite that
The contact work can be easily performed. Moreover,
The reinforcing member abuts the second frame on the first frame
Also serves as a positioning jig for welding
Special jigs must be placed outside the
Accurate and easy welding between frames without the need for
It becomes possible.

As described above, the present invention has a special effect that the bonding strength and the durability can be improved and the appearance can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment in which the present invention is applied to a table.

FIG. 2 is a side view of the embodiment.

FIG. 3 is a conceptual side sectional view showing the frame joining mechanism of the embodiment.

FIG. 4 is an exploded front conceptual view showing the frame joining mechanism of the embodiment.

FIG. 5 is a side view showing another embodiment of the present invention.

FIG. 6 is a perspective view showing an embodiment in which the present invention is applied to a chair.

FIG. 7 is a side view of the embodiment.

FIG. 8 is a schematic side sectional view showing a frame joining mechanism in the front leg of the embodiment.

FIG. 9 is a conceptual side sectional view showing a frame joining mechanism in the rear leg of the embodiment.

FIG. 10 is a side view showing another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 3 ... Frame connection mechanism 4 ... Reinforcement member 11 ... 1st frame (1st horizontal member) 11a ... End surface 12 ... 2nd frame (pedestal) 12a ... End surface (upper end surface) 31 ... Weld part 32 ... Welding Part 41: First arm part 42: Second arm part 61: First frame (horizontal member) 61a: End face (front end face) 61b ... End face (rear end face) 62: Second frame (front leg) 62a ... End surface (upper surface) 63 ... Second frame (rear leg) 63a ... End surface (upper surface) 111 ... Opening 111a ... Inner surface 122 ... Opening 122a ... Inner surface 613 ... Opening 613a ... Inner surface 614 ... Opening 614a ... Inner surface 622 ... opening 622a ... inner surface 632 ... opening 632a ... inner surface

Claims (2)

(57) [Claims] 1. A first frame having an opening in an end face and a second frame having an opening in an end face via a reinforcing member provided in each of the openings. A frame joining mechanism having a welded portion connecting the both end surfaces, wherein a first arm portion of the reinforcing member enters an opening of the first frame and is welded to an inner surface of the opening. Fixed through
Is, the second arm portion of the reinforcing member, along with formed by additionally provided on the inner surface of the opening enters the opening of the second frame, the end faces of the first and second frame Dissolution
A welded part characterized by being fixed via a contact part
Frame joining mechanism having. 2. The end faces of the first and second frames are connected to each other.
The frame joining mechanism having a welded portion according to claim 1, wherein the frame is joined via a welded portion formed by full circumference welding .