JPH0738728Y2 - Orthogonal tube connection device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for connecting a hollow leg rod of a table and a first and a second pipes, which are mutually abutted against each other, such as a horizontal pipe, with a tightening screw. .

[0002]

2. Description of the Related Art For example, in order to prevent the tightening screws from appearing on the outer surface when the hollow leg rods of a table are connected to the horizontal pipe with the tightening screws, the
Various proposals have been made (for example, Japanese Utility Model Publication No. 51-35362 and Japanese Utility Model Publication No. 53-104101).

The structure common to these is to tighten the tightening piece fitted into the first pipe body with a tightening screw fitted into the connecting block abutting on the outer surface of the first pipe body, and at the same time, to connect the block. The second pipe body to be connected, that is, the end portion of the horizontal pipe is fitted.

[0004]

The conventional connecting device for orthogonal pipes has the following problems. (A) In order to prevent rotation of the connected pipes, a plurality of tightening screws are usually provided, which makes the structure complicated,
Moreover, the work becomes troublesome.

(B) In the case of connecting with one tightening screw, in order to prevent the connecting block from rotating with respect to the first pipe body, the connecting block has a complicated structure. There must be.

Alternatively, when the contact surface of the connecting block on the outer surface of the first pipe body is made non-planar, the connecting block must be engaged, but the outer surface of the first pipe body is flat. However, such means cannot be implemented.

[0007]

According to the present invention, there is provided a device for connecting a side surface of a first tube body to a second tube body which is orthogonal to the side surface of the first tube body, the device being opened at a key point of the first tube body. Any one of the plurality of engaging holes can be properly fitted to the end portion of the second tube body.
While inserting the tightening screw inserted in the axial direction into the non-circular connecting block, insert the projecting plug projecting from a portion of the outer end face of the block apart from the tightening screw into the other engaging hole, and The end portion of the tightening screw is screwed into the female screw hole of the tightening piece inserted inside the first tube body, and the guide plug provided in the tightening piece is fitted with the projecting plug, thereby connecting the two. The above-described problem is solved by fixing the block for use to a key portion on the outer surface of the first pipe body and fitting the end portion of the second pipe body to the block.

[0008]

The function of the connecting block and the tightening piece is the first
Insert the side wall of the pipe body and tighten it with the tightening screw.
And then tightening on the outer end face of the connecting block
The stopper plug protruding from the part away from the internal screw is the first pipe body.
Continuously fit in the other engaging hole and the guide hole of the tightening piece,
In addition, the end of the second tube is a non-circular connecting block.
Being mated, the second tube is twisted, that is, its
Extremely strong resistance to rotation about the axis
It is attached to the first pipe body while holding.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, an embodiment of the present invention is a square tube-shaped front and rear rod which supports side edges of a top plate (1) of a table.
(2) The present invention is applied to (2) and a horizontal pipe (3) having a flat longitudinal section connecting the two. Hereinafter, the leg rod (2) will be referred to as a first tubular body, and the lateral tube (3) will be referred to as a second tubular body.

Three engaging holes (4), (5) and (6) are formed in the longitudinal direction at the opposite side surface points of the first tube (2). The upper and lower engaging holes (4) and (6) have a non-circular cross section, more specifically, an oval cross section, which can be properly fitted to the end portion of the second tubular body (3), and a connecting block (7). ) Upper and lower stoppers (8)
(9) is fitted, and both stoppers (8) are fitted in the central engaging hole (5 ).
The outer end portion of the tightening screw (10) loosely fitted from the inner side is fitted to the intermediate portion of the connecting block (7) separated from (9) .

The tips of the stopper plugs (8) and (9) and the tightening screw (10) slightly project inward of the first pipe body (2), and at this portion, the inside of the first pipe body (2) is formed. The upper and lower guide holes (12) (13) and the central female screw hole (14) in the tightening piece (11)
Each is inserted, and the connecting block (7) and the fastening piece (11) are fastened to the first pipe body (2) with the fastening screw (10).

(3) is a block for connection (7) at its end.
It is attached by fitting properly to the protruding portion of the block (7) and abutting on the flange (7a) at the outer end of the block (7).

It is to be noted that only one stopper plug (8) (9) is provided, and accordingly, the engagement holes (4) (6) and the guide grooves (12) (13) are also provided only one. There is also.

[0014]

Effect of the Invention (a) The connecting block and the tightening piece
Insert the side wall of the first tube between the
The outer end face of the connecting block
Plug protruding from the part away from the tightening screw
Connected to the other engaging hole of the first tube and the guide hole of the fastening piece.
The two pipes are fitted together, and the end of the second pipe is connected to a non-circular connection.
The second tubular body is screwed because it is fitted to the connecting block.
, I.e. rotation about its axis,
And attach it to the first tube with a strong resistance.
Be kicked.

(B) The plug is combined with another engagement hole of the first tube body.
Due to the continuous fitting with the guide hole formed in the tightening piece,
Rotation of the tightening piece when tightening the tightening screw.
Not only can it be prevented, but after assembly,
For the first pipe body, tightening piece, connecting block, and
All of the second tubular body, finally through the connecting block of
Can stop the rotation, and the plug is the first pipe body.
Is engaged with both the other engaging hole of the
As a result, the bending strength of the plug itself increases.

(C) Fit the tightening screw and the plug into the engaging hole.
The connecting block to the required position
It can be easily installed with a good posture.

(D) The configuration is significantly simpler than that of the conventional one.
The number of parts is small. Moreover, there is no protrusion to the outside, and the appearance is good.

[Brief description of drawings]

FIG. 1 is a perspective view of a table to which the present invention is applied.

FIG. 2 is an enlarged vertical sectional view taken along line II-II in FIG.

FIG. 3 is an exploded perspective view of a main part.

[Explanation of symbols]

(1) Top plate (2) First tube
(Leg rod) (3) Second pipe (lateral pipe) (4) (5) (6) Engagement hole (7) Connecting block (8) (9) Stopper plug (10) Tightening screw (11) Tightening Piece (12) (13) Guide hole (14) Female screw hole

Claims (1)

[Scope of utility model registration request] 1. A device for connecting a second tube body orthogonal to a side surface of the first tube body to the side surface of the first tube body, wherein any one of a plurality of engagement holes formed in a key portion of the first tube body. First, while inserting the tightening screw inserted in the axial direction into the non-circular connecting block that can be properly fitted to the end portion of the second tubular body, the other end of the outer end surface of the block is inserted into the engaging hole . From the tightening screw
Insert a protruding plug projecting from a distant portion , and screw the end of the tightening screw into the female screw hole of the tightening piece inserted inside the first tubular body, and guide the same to the tightening piece. By fitting the stopper plug into the hole, the connecting block is fixed to the outer surface of the first pipe body at a key point, and the end portion of the second pipe body is fitted into the block. Connecting device for connecting pipes.