JP3354791B2 - Pipe material feeder for pipe bending equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe feeder for a pipe bending apparatus.

[0002]

2. Description of the Related Art In a conventional pipe feeding device for a pipe bending device, a cylinder portion of a piston / cylinder mechanism is fixed to a frame, and the end of a piston rod is fixed to the pipe feeding device. By pressing the pipe material feeder in the direction of the mold by the cylinder mechanism, a reduction in wall thickness and a decrease in mold resistance during pipe bending have been performed.

[0003]

However, in such a conventional pipe material feeder for a pipe bending apparatus,
Since the supply of the pipe material was also performed by the piston / cylinder mechanism, the stroke of the piston had to be long, resulting in inconvenience in that it was difficult to make the device itself compact and the supply speed of the pipe material had to be reduced. did.

An object of the present invention is to eliminate such inconvenience.

[0005]

In order to achieve the above object, a pipe material feeder for a pipe bending apparatus according to the present invention comprises a frame having a mold and a clamp, and sprockets at both ends of the frame. A chain is wound around these sprockets, a pipe material feeder is fixed to the chain, and the pipe material is supplied to the mold by the rotation of the chain. At the same time as fixing the member, a fixture having a pawl member is arranged behind the pipe material feeder, and the cylinder portion of the piston / cylinder mechanism is fixed to the fixture, and the tip of the piston rod of the piston / cylinder mechanism is attached to the fixture. Fixed to the back of the pipe material feeder, and the pawl member to the rack member Since you removably, after supplying pipe material into a mold by driving the sprocket, piston
If the cylinder part of the cylinder mechanism is fixed to the rack member by the pawl member and the piston / cylinder mechanism is operated in this state, the fixing of the fixture to the rack member is reliable and can withstand strong power, and high precision The pipe member can be pressed in the direction of the mold under appropriate control.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG.
Is the frame. Reference numerals 21 and 21 denote sprockets, which are installed at both ends of the frame 11. The sprockets 21 and 21 are driven by an electric motor (not shown). C is a chain, and the sprocket 2
It is wound around 1,21. Reference numeral 30 denotes a pipe material feeding device, which is installed so as to be able to advance and retreat along the frame 11. The pipe feeder 30 is provided with the chain C
And moves forward and backward as the chain C rotates.
Reference numeral 31 denotes a chuck of the pipe material feeding device 30 which holds the rear end of the pipe material P. Reference numeral 40 denotes a mold, which is installed on the frame 11. This mold 40
Is used for bending the pipe material P when bending. In addition, the clamp which clamps the pipe material P with respect to the mold 40 is not shown.

Reference numeral 50 denotes a rack member, which is fixed to the frame 11. The rack member 50 is disposed along the direction in which the pipe feeding device 30 moves forward and backward. Reference numeral 60 denotes a fixture, which is arranged behind the pipe feeder 30. The fixture 60 has a claw member 61 projecting downward. By moving the pawl member 61 forward and backward, it is possible to mesh with the rack member 50 or release the mesh. Reference numeral 70 denotes a piston / cylinder mechanism. The cylinder portion 71 is fixed to the fixture 60, and the tip of the piston rod 72 is fixed to the back of the pipe feeder 30. Therefore, when the piston rod 72 is pushed out by operating the piston / cylinder mechanism 70 in a state where the fixture 60 is locked to the rack member 50, the pipe material P can be pushed out toward the mold 40. .

[0008]

The pipe feeder for a pipe bending apparatus according to the present invention comprises a frame provided with a mold and a clamp, sprockets provided at both ends of the frame, and a chain wound around these sprockets.
In a pipe material feeding device for a pipe bending device for fixing a pipe material feeding device to the chain and supplying a pipe material to the mold by rotation of the chain, a rack member is fixed to the frame and the pipe material feeding device is A fixture having a pawl member is arranged at the rear, a cylinder portion of the piston / cylinder mechanism is fixed to the fixture, and a tip of a piston rod of the piston / cylinder mechanism is fixed to a back of the pipe material feeding device, and Since the pawl member is detachable from the rack member, after the pipe material is supplied to the mold by driving the sprocket, the cylinder portion of the piston / cylinder mechanism is fixed to the rack member by the pawl member, and in this state, By operating the piston / cylinder mechanism, the fixing of the fixture to the rack member is reliable and strong. Also stand, the pipe can be pressed in the mold direction under high-precision control.

Therefore, if the pipe feeding device for a pipe bending device is used, the pipe material can be supplied to the mold by driving the motor, so that the stroke of the piston can be shortened. As a result, the device itself can be made compact. It is easy and can supply pipe material quickly,
Further, the extruding of the pipe material can be performed under highly precise control.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of a pipe material feeding device for a pipe bending device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Frame 21 ... Sprocket 30 ... Pipe material feeder 40 ... Die 50 ... Rack member 60 ... Fixture 61 ... Pawl member 70 ... Piston / cylinder mechanism 71 ... Cylinder part 72 ... Piston rod C ... Chain P ... Pipe material

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B21D 7/025 B21D 7/00 B21D 43/02

Claims (1)

(57) [Claims] 1. A frame is provided with a mold and a clamp, and sprockets are provided at both ends of the frame, and a chain is wound around these sprockets.
In a pipe material feeding device for a pipe bending device for fixing a pipe material feeding device to the chain and supplying a pipe material to the mold by rotation of the chain, a rack member is fixed to the frame and the pipe material feeding device is A fixture having a pawl member is arranged at the rear, a cylinder portion of the piston / cylinder mechanism is fixed to the fixture, and a tip of a piston rod of the piston / cylinder mechanism is fixed to a back of the pipe material feeding device, and A pipe member feeder for a pipe bending apparatus, wherein the pawl member is detachable from the rack member .