JPH0735617Y2 - Square pipe throttling 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 squeezing a connecting end of a rectangular pipe for connecting pillars, for example, when assembling a vinyl house.

[0002]

2. Description of the Related Art Conventionally, a vinyl house is assembled by using a cylindrical pipe as a column, but it is often time-consuming to perform centering and fastening by bolt-nut tightening and fitting at the time of connection.

[0003]

SUMMARY OF THE INVENTION In order to solve the above problems, it is an object of the present invention to provide a throttling device which can squeeze the connecting end of a rectangular pipe to facilitate fitting and fastening. .

[0004]

The above object of the present invention can be achieved by an apparatus having the following construction. That is, the gist of the invention is to install a throttle device main body in which a square pipe insertion hole is penetrated on a base, and install a center screw at the outlet of the square pipe insertion port.
Internal drawing die that inserts the pindle and always expands and contracts
Diametrical expansion dia.
Place the chair and attach the center spindle.
The base end is the center spin arranged in the outlet extension direction.
By connecting it to the dollar cylinder,
It can be driven back and forth along the center position, and at the tip
A diametrical expansion cam is attached, and the diametrical expansion cam is used for the center spin.
Expanding the above expansion dia. Die by moving the dollar back and forth
In addition to providing a mechanism for maintaining the
External drawing dies are placed on all four sides of the chair.
And a diaphragm device for square pipes .

[0005]

In the present invention, as shown in FIG. 4, the square pipe A is inserted from the pipe insertion port 22 of the diaphragm device main body 2. Then, the diameter-expanding drawing die 17 in a state where the diameter is reduced in the square pipe A
The internal drawing die 4 and the internal drawing die 4 are held in the inserted state by the internal drawing die mounting flange 14. Next, the diameter-expansion cam 20 at the tip of the center spindle 5 is pushed into the diameter-expansion drawing die 17, whereby the diameter-expansion drawing die 20 is expanded in diameter and firmly fixed in the square pipe A. Under such a condition, the drawing work of the rectangular pipe A is performed by the external drawing dies 3, 3, .... Therefore, as shown in FIG. 4, when the drawing work is completed, the cam spindle mounting flange 12 mounted on the base end of the center spindle 5 is attached.
Is pushed forward by the center-spindle cylinder 6, the diameter-expanding cam 20 at the tip thereof is released from the diameter-expanding aperture die 17, and the diameter is reduced by the expanding and contracting spring 19. Further, the cam spindle mounting flange 10
The movement of the cam drive rod 11 is forcibly stopped by the stop portion 13 of the cam drive rod 11, and the center-spindle cylinder 6 is moved rearward from that state as shown by the imaginary line in the figure by a counter-action. By this operation, the cylinder-mounting flange 10 is also moved rearward at the same time, whereby the internal drawing die mounting flange 14 connected to the drawing die driving rod 9 is also moved rearward, and the internal drawing die 4 and the diameter expansion drawing die 17 are also moved. And are taken out from inside of the square pipe A. Then, by pulling out the square pipe A from the inside of the squeezing device main body 2, the square pipe A as shown in FIG.
Can be manufactured.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A square pipe throttling device according to the present invention will be described below.
A detailed description will be given with reference to the drawings showing the embodiment. FIG. 1 is an overall explanatory view of the present invention. On the base 1, the diaphragm device main body 2
Is to be erected. This diaphragm device main body 2 is composed of external drawing dies 3, 3, ..., Which are pressed in a square shape from four directions, and an internal drawing die 4 which is held in a rectangular pipe. The center spindle 5 holds the center spindle 5.
Has its base end movable back and forth by a center-spindle cylinder-6. Further, the center spindle cylinder 6 is a cylinder of the expansion device body 2.
It is held by an overall guide attachment flange 8 attached to the overall guide rod 7 attached to the attachment wall 2 ', and a cylinder-attachment flange 10 attached to the aperture die driving rod 9 as shown in FIG. The above center
A cam spindle mounting flange 12 which is inserted into the cam driving rod 11 in a loose fit manner is mounted on the spindle 5, and the cam spindle mounting flange 12 is mounted on the cam driving rod 1.
This is a mechanism for stopping at a fixed position by the stop portion 13 within the stroke range of the step of No. 1.

An internal drawing die mounting flange 14 is attached to the base end side of the drawing die driving rod 9, and the base end of the internal drawing die 4 is connected by the internal drawing die mounting flange 14. Therefore, as shown in FIG. 3, the internal drawing die 4 is provided with an insertion hole 15 through which the center spindle 5 can be inserted in a loose fit manner along the center thereof, and four holding pins 16 are provided on the tip side thereof. 16, ...
・ Protrudingly installed, four diameter expansion dies 17, 17,
By inserting the elongated holes 18, 18, ...
・ It is considered as a mechanism to hold. This diameter expansion die 1
7, 17, ... are groove portions 1 engraved on the outer wall surface thereof.
Expansion spring 19 fitted to 8 ', 18', ...
The internal diameter of the internal drawing die 4 is maintained by the above. A diameter-expanding cam 20 is connected to the tip of the center spindle 5, and the diameter-expanding cam 20 is connected to the diameter-expansion drawing die 1.
The mechanism for expanding the diameter-expanding dies 17, 17, ... By adjusting the diameter of the expansion-expansion dies 17, 17 ,. The external drawing dies 3, 3, ... Are the hydraulic cylinders 21 and 2 shown in FIG.
The mechanism is operated by 1, ...

[0008]

As described above, according to the present invention, the squeezing work of the rectangular pipe can be easily performed and the replacement thereof can be smoothly performed. Further, since the squeezing boundary is not broken by the diameter-expanding die, it is possible to achieve various effects such that the square pipes can be connected accurately and reliably.

[0009]

[Brief description of drawings]

1 is an overall side view of the present invention.

FIG. 2 is a partially enlarged plan view of the present invention.

FIG. 3 is an enlarged perspective view of the internal drawing die of the present invention.

FIG. 4 is an internal cross-sectional view of the present invention.

FIG. 5 is an operation explanatory view of the present invention.

FIG. 6 is a perspective view of a square pipe squeezed according to the present invention.

[Explanation of symbols]

 1 base 2 expansion device body 3 external expansion die 4 internal expansion die 5 center spindle 6 center spindle cylinder 17 expansion diameter expansion die 19 expansion spring 20 expansion diameter cam 22 pipe insertion port

Claims (1)

[Scope of utility model registration request] 1. A squeezing device main body having a rectangular pipe insertion opening penetratingly installed on a base, and the projection of the rectangular pipe insertion opening.
Internal drawing die with center spindle inserted through the mouth
And normally 4 minutes reduced by expansion spring
Place a split-shaped diameter expansion die and
The base end of the rotary spindle is arranged in the outlet extension direction.
Is connected to the center spindle cylinder.
It makes it possible to drive back and forth along the center position of the square pipe,
Further, a diametrical expansion cam is attached to the tip of the diametral expansion cam.
The above diameter can be expanded by moving the center spindle back and forth.
A mechanism that holds the expanded state of the drawing die
The external drawing die on all four sides of the above internal drawing die.
Squeezing equipment for square pipes, characterized by being placed respectively
Place