JP2918369B2 - Pipe end processing machine - 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 end processing device for processing the end of various pipes to form a flange for communication with another pipe, for example. More specifically, with respect to a holder for holding the end of the pipe to be processed, the end of the pipe is expanded in a funnel shape by entering the pipe held by the holder. The wedge-shaped body and the pressing body for expanding the end of the enlarged-diameter pipe formed by the wedge-shaped body into a flange shape are movable along the axial direction of the pipe and rotatable around the axis of the pipe. And a pipe end processing device provided with a wedge-shaped body operating tool and a pressing body operating tool for operating the wedge-shaped body and the pressing body, respectively.

[0002]

2. Description of the Related Art The position relationship between a wedge-shaped body and a pressing body with respect to an end of a pipe held by a holder is described in a state where the wedge-shaped body is closer to the one conventionally known as the above-mentioned pipe end processing device. And the pressing member are configured to be switched to a state of being closer to each other, and a moving member provided with the wedge-shaped member and the pressing member is threadably connected to a main body of the pipe end processing device. . Processing of the pipe end using this conventional pipe end processing machine
First, the wedge-shaped body is switched to a state closer to the end of the tube in the holding state, and the wedge-shaped body is used to operate the wedge-shaped body to expand the end of the pipe in a funnel shape. The body is separated from the end of the tube, and the pressing body is switched to a state closer to the end of the tube than the wedge-shaped body. This is carried out by a final processing step in which the end of the enlarged diameter of the pipe is expanded along the holder by being pressed along the flange. Therefore, the force applied to the end of the pipe to perform this processing requires a greater force in the final processing stage than in the initial processing stage.

[0003]

As described above, in the conventional pipe end processing machine, when shifting from the initial processing stage by the wedge-shaped body to the final processing stage by the pressing body,
Operate the wedge-shaped body operation tool, reversely rotate the wedge-shaped body around the pipe axis and move it in the direction away from the pipe end, contrary to the procedure of the initial processing stage. It is necessary to take a procedure of switching to a state closer to the pipe end than the wedge-shaped body, and subsequently operating the pressing body operation tool to move to the final processing stage, which has a disadvantage that it is extremely troublesome. Further, in order to apply a large force to a final processing stage of pressing the pressing body along the pipe axis direction while rotating the pressing body about the pipe axis, the moving member to which the pressing body is attached is a main body of the pipe end processing device. Oscillation occurs in the radial direction of the pipe between the threaded connection part and the tip part, so that the rotating shaft of the pressing body tends to be eccentric with respect to the pipe axis. When you press the edge,
Due to uneven forces, there is a risk that the shape of the deployed wedge-shaped tube edge will be uneven.

Accordingly, an object of the present invention is to provide a pipe end processing device capable of easily and easily processing a pipe edge into a flange shape in view of the above-mentioned disadvantages of a conventional pipe end processing device. Is to provide.

[0005]

A first feature of the present invention to achieve this object is that a holder for holding an end of a pipe to be processed is held by the holder. For the wedge-shaped body for expanding the edge of the tube in a funnel shape by entering into the tube in the holding state, while maintaining the position in the end state of the tube edge expansion, the edge of the expanded tube is removed. There is provided a wedge-shaped body position holding mechanism that allows the pressing body to be moved by a pressing body operating tool that operates the pressing body for deploying in a flange shape.

A second characteristic configuration is that the pressing body is formed by a rotating body rotatable around an axis along a direction perpendicular to the axial direction of the tube.

A third characteristic configuration is that the wedge-shaped body position holding mechanism holds the wedge-shaped body movably in the axial direction of the tube, and biases the wedge-shaped body toward the holder. And a spring member.

[0008]

According to the first feature of the present invention, a pipe for holding an end portion of a pipe to be processed enters the pipe in a state of being held by the pipe holding tool. Of the wedge-shaped body for expanding the end of the tube into a funnel shape, while maintaining its position in the end state of the end of the tube end, operating the pressing body for expanding the end of the expanded tube into a flange shape Since the wedge-shaped body position holding mechanism that allows the movement of the pressing body by the pressing body operating tool is provided, it is possible to shift to the expansion of the expanded pipe end by the pressing body following the expansion of the pipe edge by the wedge-shaped body. There is no need to switch between these operations. Further, at the time of pressing the enlarged-diameter pipe edge by the pressing body, the moving member is provided in both the screw connection portion with the pipe end processing device and the contact portion where the pressing body contacts the pipe in the radial direction of the pipe. Since the support is performed in a state where the movement is restricted, the enlarged-diameter pipe end can be developed in a flange shape with its rotation axis coinciding with the axis of the pipe. Therefore, it is possible to apply a uniform pressing force to the end of the enlarged-diameter tube, and to process the end of the enlarged-diameter tube into a flange-like shape without distortion.

According to the second characteristic configuration of the present invention, the pressing body is formed by a rotating body rotatable around an axis along a direction orthogonal to the axial direction of the tube. When the tube edge expanded in a funnel shape by the body is deployed by the pressing body, the friction acting between the expanded tube end and the pressing body is reduced, and the pressing body can be operated with a small force. Becomes

[0010] According to a third characteristic configuration of the present invention, the wedge-shaped body position holding mechanism holds the wedge-shaped body movably in the axial direction of the tube, and the wedge-shaped body to the holder side. Since the spring member is provided with a pressing force, the wedge-shaped body can be pressed against the enlarged-diameter tube end even when the enlarged-diameter tube end is expanded by the pressing body, and the holding force of the tube increases. The holding force of the tube by the holder can be reduced to suppress the deformation of the tube, and the deformation such as the contraction of the inner diameter of the held portion of the tube caused by the pressing force of the pressing body can be prevented.

[0011]

As a result, it is possible to save the trouble of switching between the wedge-shaped body and the pressing body, and it is possible to perform a pipe end machining with a small distortion by a simple operation.
The work efficiency has been improved, and the finish of the pipe end has become more beautiful.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 5, the pipe end processing device includes a pipe 2 connected to a connector 3 of a water heater through a connecting member 1.
It is used when, for example, forming a diameter of a retaining flange 2a that can be brought into contact with the inner surface step portion 1a of the connection member 1 at an end portion. In the drawing, reference numeral 3a denotes packing at the connection portion.

As shown in FIG. 1, a holding member 6 capable of holding and releasing the tube 2 from a surrounding main body 5 having a grip handle 4, and a tube fixed by the holding member 6. A moving member 7 that moves far and near with respect to the edge A of the second is attached by a screw fitting portion 8. The moving member 7 includes a punch 9 as a wedge-shaped body that expands the diameter of the end A of the tube 2 in a funnel shape as the tube 2 moves toward the end A of the tube 2 and the tube 2 expanded in a funnel shape. A processing member K having a rotating body 10 as a pressing body that spreads the edge A in a flange shape is attached.

The holder 6 will be described in more detail. As shown in FIG.
A retainer 6 is provided which is swingable around 1. A wing nut 15 is screwed into a screw 14 protruding outward from a main body 5 through a long groove 13 cut out at a free end of the retainer 6. ing. By tightening the wing nut 15 while the holder 6 is moved toward the body 5, the pipe 2 is held and fixed between the holder 6 and a tube receiving portion 5 a provided on the body 5. It has become.

The moving member 7 will be further described.
As shown in FIG. 1, a rotation operation handle 16 provided with a ratchet mechanism, which also serves as a wedge-shaped body operation tool and a pressing body operation tool, is mounted. It is attached to the main body 5 via the screw fitting portion 8 so as to move far and near to the end A of the tube 2 while rotating around X. The screw fitting portion 8 is externally fitted to the female screw portion 19 for screwing the male screw portion 7a of the moving member 7 and the small diameter portion 19a of the female screw portion 19 between the female screw portion 19 and the main body 5. It comprises a plurality of disc springs 20. A cylindrical frame 7b with a bottom is provided at the tip of the male screw portion 7a to connect and hold the processing member K.

In addition to the description of the processing member K, as shown in FIG. 2, the punch 9 and the punch 9
And a pair of rotating bodies 10 provided on both sides of the support member 21 and a support shaft 21 which is fitted in the elongated hole 23 of the punch 9 and both the rotating bodies 10 and both ends of which are fixed to the frame 7b of the moving member 7. And a spring member 2 for urging the punch 9 toward the holder 6.
2 and a transmission plate 24 for transmitting the urging force of the spring member 22 to the punch 9.
b is provided in an in-fit state. The wedge-shaped body position holding mechanism 12 includes the frame 7b, the spring member 22, and the transmission plate 24.

Next, the processing of the end A of the tube 2 into a wedge shape will be described with reference to FIGS. FIG. 3 shows the punch 9
Is a state in which the end A of the tube 2 is expanded in a funnel shape,
FIG. 4 shows a state in which the end A of the enlarged diameter pipe 2 is developed by the rotating body 10 and formed into a flange shape.

The punch 9 before working is formed by the spring member 2
2. When the support member 21 is pushed by the holding member 6 and the support shaft 21 and the edge 23a of the elongated hole 23 provided in the punch 9 are in contact with each other. 2
A wedge surface 9a of a punch 9 that rotates around the pipe 2 axis X at the edge A
Are brought into contact with each other and the moving member 7 is further advanced by screwing.
By the pressing force of the spring member 22 acting from the wedge surface 9a,
The end A of the tube 2 is pushed and spread along the wedge surface 9a and expands in a funnel shape. When the moving member 7 is further screwed following the diameter expansion of the end A of the pipe 2, the processing member K provided with the rotating body 10 rotates and moves in a direction approaching the holder 6 side.
Since the punch 9 is in contact with the holder 6 through the end A of the enlarged-diameter pipe 2, the punch 9 rotates around the axis X of the pipe 2 while maintaining the position in the X-axis X direction in the expanded state. I do. As the moving member 7 advances, the rotating body 10 comes in contact with the end A of the enlarged-diameter tube 2 and pushes the end 2 of the tube 2 between the upper end of the holding member 6 and the tube 2. , Processed into a collar shape.

[Alternative Embodiment] The punch 9 described in the previous embodiment is not limited to the shape of a wedge formed by two surfaces that are inclined with respect to each other, but includes, for example, a portion including a conical portion. In other words, it is sufficient if the end of the tube 2 can be enlarged in a funnel shape, and these are collectively called a wedge-shaped body.

Further, the rotating body 10 is not limited to a rotating body that can rotate around an axis along a direction orthogonal to the axial direction of the tube 2. For example, it may be a projection having a rounded tip at the end A of the tube so that it can be processed without being distorted or damaged, and these are collectively called a pressing body.

On the other hand, the wedge-shaped body 9 and the transmission plate 24 are not limited to being separate bodies but may be integrated. In short, the spring member 2
It suffices if it is formed so that the second urging force can be transmitted to the wedge-shaped body 9.

Further, the wedge-shaped body operating tool and the pressing body operating tool may be provided separately as well as being formed so as to use both as described in the previous embodiment.
Driving for the operation is not limited to manual operation, and can be performed by providing a driving source such as a motor.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a diagram showing a pipe end processing device.

FIG. 2 is a view showing a moving member.

FIG. 3 is an operation diagram of a wedge-shaped body.

FIG. 4 is an operation diagram of a pressing body.

FIG. 5 is a diagram showing a connection example.

[Explanation of symbols]

 2 Tube 6 Holder 7b Frame 9 Wedge-shaped body 10 Pressing body 12 Wedge-shaped body position holding mechanism 16 Pressing body operation tool (rotary operation handle) 22 Spring member A Edge

Claims (3)

(57) [Claims] 1. A holder (6) for holding an end of a pipe (2) to be processed enters a tube (2) held by the holder (6). A wedge-shaped body (9) for expanding the edge (A) of the tube (2) in a funnel-like manner;
A pressing body (10) for expanding the end of the enlarged-diameter pipe formed by the wedge-shaped body (9) into a flange shape is provided so as to be movable along the axial direction of the pipe (2). The wedge-shaped body (9) and the pressing body (1) are attached so as to be rotatable around the axis.
0) In a pipe end processing device provided with a wedge-shaped body operating tool and a pressing body operating tool for operating each of the above (0), while maintaining the position of the wedge-shaped body (9) in the end state of the pipe end edge diameter expansion,
A pipe end processing machine provided with a wedge-shaped body position holding mechanism (12) for allowing movement of the pressing body (10) by the pressing body operating tool (16). 2. The pipe end processing device according to claim 1, wherein the pressing body (10) is a rotating body rotatable around an axis along a direction orthogonal to an axial direction of the pipe (2). . 3. A frame (7b) for holding the wedge-shaped body (9) movably in the axial direction of the tube (2) on the wedge-shaped body position holding mechanism (12), and the wedge-shaped body (9). The pipe end processing device according to claim 1 or 2, further comprising a spring member (22) for urging the holding member (6) toward the holder (6).