JPH0619938U - Square pipe throttling device - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a throttling device capable of easily throttling a connecting end of a rectangular pipe. [Constitution] According to the present invention, a diametrical expansion dicing die 17, 17, ... Is divided into four parts on the front end side of the internal drawing die 4 and is loosely fitted on the center spindle 5 with the expansion spring 19 constantly reducing the diameter. And a diameter-expanding cam 20 connected to the tip of the center spindle 5 when the drawing operation is performed.
The expanded diameter drawing dies 17, 17, ...
The configuration is such that 7, ...

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for squeezing a connecting end of a square pipe for connecting pillars when assembling a vinyl house, for example.

[0002]

[Prior art]

 Conventionally, a vinyl house is assembled by using a cylindrical pipe as a pillar, but it is often very time-consuming to perform centering and fastening by bolt-nut tightening and fitting when connecting them.

[0003]

[Problems to be solved by the device]

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

[0004]

[Means for Solving the Problems]

 The above object of the present invention can be achieved by a device having the following configuration. That is, the gist of this is that a throttle device main body with a rectangular pipe insertion port penetrating is installed on the base, and external throttle dies that are pressed from four directions are arranged on the outlet side of the throttle device main body. Is always provided with a center spindle that can be driven back and forth along the center position of the rectangular pipe, and an inner drawing die that is inserted loosely into the center spindle can be inserted, and the tip side of the inner drawing die is In addition, the four-diameter expansion diametric dies are always inserted into the center spindle in a loosely-fitted state while being contracted by the expansion spring, and the diameter expansion dies are expanded at the tip of the center spindle. This is a throttle device for a square pipe, which has a structure in which a diameter-expanding cam that holds the state is connected.

[0005]

[Action]

 According to the present invention, as shown in FIG. 4, a square pipe A is inserted from a pipe insertion port 22 of the squeezing device main body 2. Then, the expanded diameter drawing die 17 and the internal drawing die 4 which have been reduced in diameter in the rectangular pipe A are held by the internal drawing die mounting flange 14 in the inserted state. Next, the diameter-expanding cam 20 at the tip of the center spindle 5 is pushed into the diameter-expanding drawing die 17, whereby the diameter-expanding drawing die 20 is expanded and firmly fixed in the square pipe A. . Under such a state, 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 pushed forward by the center spindle cylinder 6 so that the tip end of the cam spindle mounting flange 12 is pushed forward. The diameter-expanding cam 20 is released from the diameter-expanding drawing die 17 and is contracted by the expansion / contraction spring 19. Further, the movement of the cam spindle mounting flange 10 is forcibly stopped by the stop portion 13 of the cam drive rod 11, and from that state, the center spindle cylinder 6 is moved backward by the anti-action as shown by the imaginary line in the figure. Will be moved to. 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 to move the internal drawing die 4 and the diameter-expanding diaphragm. The die 17 and the square pipe A are taken out. Then, by pulling out the square pipe A from the inside of the squeezing device body 2, the square pipe A as shown in FIG. 6 can be manufactured.

[0006]

【Example】

 Hereinafter, the throttle device for a rectangular pipe according to the present invention will be described in detail with reference to the drawings showing an embodiment thereof. FIG. 1 is an overall explanatory view of the present invention. The diaphragm device main body 2 is installed on the base 1. The drawing 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 is held by a center spindle 5, and the center spindle 5 has its base end movable back and forth by a center spindle cylinder 6. Further, the center-spindle cylinder 6 includes an overall guide mounting flange 8 mounted on an overall guide rod 7 mounted on the cylinder mounting wall 2'of the throttle device main body 2 and, as shown in FIG. It is retained by a cylinder mounting flange 10 which is mounted on the drive rod 9. A cam spindle mounting flange 12 which is inserted into the cam driving rod 11 in a loose fit manner is mounted on the center spindle 5. This is a mechanism for stopping at a fixed position by the stop portion 13 within the range.

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, in the internal drawing die 4, an insertion hole 15 through which the center spindle 5 can be inserted in a loose fit manner is provided along the center thereof, and four holding pins are provided on the tip side thereof. , 16 are projected and are inserted into the long holes 18, 18, ... Which are obliquely formed through the four diameter expansion dies 17, 17 ,. A mechanism for holding the drawing dies 17, 17 ,. .. with the same diameter as the internal drawing die 4 by means of an expanding and contracting spring 19 fitted in the groove portions 18 ', 18' ,. Held in. An expanding cam 20 is connected to the tip of the center spindle 5, and the expanding cam 20 is inserted into the expanding diaphragm die 17, 17 ... The diameter of the square pipe can be expanded according to the inner diameter of the square pipe. The external throttle dies 3, 3, ... Are mechanisms operated by the hydraulic cylinders 21, 21 ,.

[0008]

[Effect of device]

 As described above, according to the present invention, the drawing 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 expanding die, various effects such as accurate and reliable connection of the rectangular pipes can be obtained.

[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 port penetratingly installed on a base, and external squeezing dies which are pressed from four directions are respectively arranged on the outlet side of the squeezing device main body, and the outlet side is further provided. Is always provided with a center spindle that can be driven back and forth along the center position of the rectangular pipe, and an inner drawing die that is loosely fitted in the center spindle can be inserted therethrough. The divided expansion diametric dies are always inserted into the center spindle in a loosely fitted state in a state of being contracted by the expansion spring, and the expanded diametric dies are expanded at the tip of the center spindle. A squeezing device for square pipes, characterized in that it has a structure in which a expanding cam to be held is connected.