JP2586795Y2 - Connecting device such as table in 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 connecting device for a table or the like in a chair for connecting a table for storing baggage or the like or a magazine rack for storing a magazine or the like to a chair installed in a lobby or the like. It is.

[0002]

2. Description of the Related Art Conventionally, the above-mentioned connecting device is, for example,
As shown in JP-A-8-22606, a plurality of vertical grooves are cut at the lower end, and a tubular support having a downward tapered surface is vertically provided on the inner periphery of the lower end, and this tubular support is attached to a tubular leg. By loosely inserting into the upper end of the column, and inserting a screw into the through hole formed in the center of the receiving member, compressing the downward tapered surface of the pipe-shaped support shaft on the outer periphery at the lower end of the screw. The central part of the fixing piece having an upward tapered surface that pushes the lower end of the tubular support shaft outward is screwed together.

[0003] For this reason, if the screw is tightened strongly, the screw and the fixing piece may sometimes rotate together with the receiving member, and it may not be possible to completely tighten the screw.

[0004]

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned drawbacks, and it is possible to securely tighten the connecting screws to the end and to easily perform the operation of inserting the connecting screws. The purpose of the present invention is to provide a connecting device such as the above.

[0005]

Means for Solving the Problems The upper and lower portions of the joint member are connected to the upper end of a leg having a threaded portion formed in the hollow interior and the lower end of a connecting member having a fastening portion formed in the hollow interior. An operation hole is formed in the table or the like connected to the upper end of the coupling body so as to coincide with the vertical direction of the screwing portion tightening portion, and the connecting screw is inserted from the operation hole into the screwing portion. The connecting body and the leg are connected by the fastening portion and the screwing portion, and the guide hole at the lower end of the funnel-shaped guide wall tapered downward to the joint member is formed by the screwing portion. Is formed so as to face upward.

[0006]

According to the above-mentioned means, since the threaded portion is formed on one side, the connecting screw rotates until the leg and the connecting body are completely tightened, and the leg and the connecting body are firmly connected. Also,
A funnel-shaped guide wall is provided on the joint member located between the leg and the connecting body, and the lower end opening of the guide wall faces the screwing portion. And the leading end of the connecting screw is securely screwed into the screwing portion.

[0007]

Embodiments will be described below with reference to the drawings. In FIG. 2, reference numerals 1 and 1 denote legs which are disposed at predetermined intervals on the left and right and are connected by a connecting rod 11.
Reference numeral 2 denotes a backrest attached to a seat support (not shown) detachably attached to the connecting rod 11, and reference numeral 13 denotes a seat attached to the seat support.

A connecting body 3 having a table plate 30 connected to the upper end thereof via a joint member 2 is connected to one leg 1 with a connecting screw 4, a washer 5, and a locking metal fitting 6.

Since the legs 1 and 1 are formed in the same shape facing each other, only one of them will be described. The leg 1 is formed of a round pipe material, the upper end is opened, and the adjuster 1 is provided at the lower end.
4, a synthetic resin leg end cap 15 is detachably attached to the opening at the upper end, and a connecting projection (not shown) projecting toward the other leg 1 is provided inside the upper end. A vertical leg 16 and an L-shaped horizontal leg 18 having an end fixed to the front surface of the intermediate portion of the vertical leg 16 and an adjuster 17 attached to the other end.

[0010] A threaded portion 7 is formed inside the vertical leg 16. The screwing portion 7 is fixedly formed with a plate nut 73 facing a lower surface of a hole 72 formed in a center portion of an upwardly U-shaped screwing metal fitting 71 fixed in a diameter direction to an inner surface of an upper end portion of the vertical leg 16. Have been.

The joint member 2 has a vertical leg 16 at the center in the vertical direction.
Is located between the upper end surface of the connector 3 and the lower end surface of the connecting body 3,
6, an annular flange portion 21 flush with the outer surface of the connecting body 3, a lower fitting projection 22 formed below and above the annular flange portion 21 and fitted inside the upper end of the vertical leg 16; An upper fitting protrusion 23 that fits inside the lower end of the body 3 and a guide hole 24 that tapers downward from the inner surface of the upper end of the upper fitting protrusion 23 and that faces the upper end of the screwing portion 7 at the lower end. Funnel-shaped guide wall 25 formed
More integrally formed of a synthetic resin material.

The connecting body 3 has the same shape as the vertical leg 16, the connecting plate 1 on a flat plate is fixed at the upper end, the table plate 30 is connected to the upper surface of the connecting plate 31 by appropriate means, and tightened inside the upper part. A part 8 is formed. Then, the table plate 30 and the connecting plate 31 are aligned with the screwing portion 7 in the vertical direction above the fastening portion 8.
, And an operation hole 32 facing the inside of the connector 3 is provided.

The tightening portion 8 is formed with a hole 82 through which the connecting screw 4 is inserted at the center of an upward U-shaped tightening metal fitting 81 fixed in a diameter direction to the inner surface of the upper end of the connecting body 3. . The operation hole 32 has a slightly smaller diameter on the connecting plate 31 side than on the table plate 30 side.
It is set to 1.

The top cap 33 comprises a lid 331 for concealing the operation hole 32 and a cylindrical body 332 projecting downward from the lid 331. The lower end of the body 332 has
A predetermined number of locking projections 333 projecting outward and engaging with the top cap mounting hole 311 are formed.

The connecting screw 4 is formed by a screw shaft 41 longer than the length from the screwing portion 7 to the tightening portion 8, and a head portion 42 integrated with the screw shaft 41 and located on the upper surface of the tightening portion 8. The connection member 3 and the leg 1 are firmly connected to each other via the washer 5 and the locking metal member 6 by screwing with the screw portion 7.

That is, the locking metal fitting 6 has an insertion hole 61 for the screw shaft 41 formed in the vertical direction at the center, a hole 82 at the upper end, and a flange 62 larger than the head 42. A substantially inverted conical inclined guide 63 having an upper portion slightly larger than the hole 82 and a lower portion smaller than the hole 82 is formed below.

The present invention is constructed as described above. When connecting the table plate 30 to which the connecting body 3 is connected to the leg 1, the lower fitting projection 22 of the joint member 2 is connected to the opening at the upper end of the leg 1. Then, the connecting body 3 integrated with the table plate 30 and the connecting plate 31 and from which the top cap 33 has been removed is fitted to the upper fitting projection 23 of the joint member 2. And washer 5,
The screw shaft 41 of the connection screw 4 is inserted into the locking metal 6, and the connection screw 4 is inserted into the hole 82 through the operation hole 32 of the table plate 30.
And insert it downward. Then, the tip of the screw shaft 41 is guided by the guide wall 25 of the joint member 2 and faces the screw portion 7 and is screwed. Then, the head 42 pushes down the locking metal fitting 6, and the inclined guide 63 of the locking metal fitting 6 is pressed against the end face of the hole 82, so that the leg 1 and the connecting body 3 are firmly connected. At this time, an upward force that pushes up the head 42 of the connection screw 4 is applied as a reaction force to the locking metal 6, and the locking screw 4 is locked.

[0018]

As described above, a screwing portion is provided at the upper end of the leg, a tightening portion is formed in the connecting body, and the two are connected by connecting screws. There is no danger that the piece and the screw rotate together, and the connection is firm. Since there is a joint member between the leg and the connecting body that fits into the upper and lower ends of each other, when connecting the two with the connecting screw, it is already in a temporarily fixed state, so the insertion of the connecting screw Operation is easy. Further, a funnel-shaped guide wall tapering downward is formed in the joint member, and the guide hole at the lower end of the guide wall faces above the threaded portion. Since the screw can be securely screwed into the screw portion with a simple operation of merely inserting the screw from above, the connecting operation is very easy.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part of the present invention.

FIG. 2 is an exploded perspective view showing a connected state of a table plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Leg 2 Joint member 24 Guide hole 25 Guide wall 3 Connecting body 30 Table plate 32 Operation hole 4 Connecting screw 6 Threaded part 8 Tightening part

Claims (1)

(57) [Scope of request for utility model registration] 1. A lower part of a joint member is fitted to an upper end of a leg body having an open upper end surface and a threaded portion formed in a hollow interior,
A table or the like is connected to the upper end of the joint member, the lower end surface is open, and the lower end of the connection body having a hollow portion formed with a tightening portion is fitted. An operation hole is formed in the table or the like so as to coincide with the vertical direction of the portion, and a connection screw is inserted through the operation hole and screwed into the screw portion. The chair is characterized in that the body is connected and a guide hole at the lower end of a funnel-shaped guide wall tapering downward is formed on the joint member so as to face above the screw portion. Table and other connecting devices.