JPS6331779Y2 - - Google Patents

Description

[Detailed description of the invention] For example, as shown in FIG. 2
It is used when expanding and forming a retaining flange 2a that can come into contact with the inner surface step 1a of the connecting plug 1 at the end. A single press that presses and moves a fixing part that fixes the position and a forming tool that is attached to the end of the pipe to be processed fixed to this fixing part in the direction of the tube axis, thereby pushing and expanding the pipe end. A mechanism for pushing and spreading the tube end portion with a first forming tool into a flat shape, and further pushing and spreading the tube end portion pushed and spread by the first forming tool with a second forming tool, so as to spread the tube end portion against the tube axis. The present invention relates to a tube end forming apparatus configured to form a flange in a perpendicular position or a position close to the perpendicular position.

Conventionally, in the above-mentioned pipe end forming apparatus, a first forming tool and a second forming tool are separately prepared, and after the first forming tool presses and expands the pipe end into a tupular shape, this first forming tool is used. The first forming tool was removed from the apparatus and the second forming tool was installed to form a flange in a position perpendicular to the tube axis or in a position close to this.

For this reason, there is a drawback that it is troublesome to replace the first molding tool and the second molding tool, as well as to attach and detach the same, and because it is necessary to remove the molding tool that is not in use from the device, there is also the drawback that the molding tool is easily lost. .

Therefore, as described in JP-A No. 58-77719, for example, when the first forming tool and the second forming tool are attached to separate pressing mechanisms to press and spread the tube end portion into a flat shape. The first forming tool is applied to the tube end and pressed by the pressing mechanism to which the first forming tool is attached, and then the first forming tool is retired from the tube end and the second forming tool is applied. A tube end forming device configured to apply a tool to a tube end and press it with a pressing mechanism to which the second forming tool is attached and which is different from the pressing mechanism to which the first forming tool is attached. A processing device has been proposed.

However, such molding processing equipment
Since it is necessary to provide a pressing mechanism for each of the forming tool and the second forming tool, the structure of the entire device becomes complicated and manufacturing costs increase, and the entire device becomes larger, so it is difficult to easily move the device. Therefore, it may not be possible to adopt a simple method of use, such as forming the end of the tube at a convenient location for construction.

The present invention was developed in view of the above-mentioned circumstances, and by devising the forming tool and its mounting structure, it can be used without removing the forming tool from the main body of the device.
Although the first molding tool and the second molding tool can be easily replaced, there is no risk of losing the molding tool, and work efficiency can be improved, the entire device does not have to be larger than the conventional method. First, it is an object of the present invention to provide a tube end forming device that has a simple structure and can be manufactured at low cost.

The characteristic structure of this invention to achieve the above purpose is as follows:
In the above-mentioned tube end forming apparatus, the first
A forming member in which a forming tool and a second forming tool are integrally connected is positioned between the pressing mechanism and the tube end, and is held movably along the tube axis direction, and the forming member a posture switching mechanism that can switch the posture of the forming member between a posture in which the first forming tool acts on the tube end and a posture in which the second forming tool acts on the tube end; and a posture holding mechanism that maintains the posture of the forming member. This structure provides the following effects.

That is, the posture of the forming member in which the first and second forming tools are connected is switched by the posture switching mechanism, the forming tool to be applied to the tube end is selected, and while the forming tool is held in that position, the pressing mechanism is used. When pressed, the tube ends are expanded while the entire molded member moves along the tube axis direction.

Therefore, the first forming tool and the second forming tool can be connected to each other by simply changing the posture of the forming member, without removing the forming tool from the main body of the apparatus.
Since the forming tool can be replaced with the second forming tool, there is no risk of losing the forming tool, and moreover, there is an effect that work efficiency can be improved.

Furthermore, since the first forming tool and the second forming tool are each pressed and moved by a single, common pressing mechanism, the structure can be simplified and manufactured at low cost, and the entire device can be manufactured at low cost. This has the effect that it is possible to miniaturize the machine as much as possible, and it is easy to adopt a simple method of use in which the processing device is moved to a desired location and processed.

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 1, among the electrical wiring pipes 2 and 3 connected via the plug 1, one pipe (an example of a pipe to be processed) 2 has an inner surface stepped portion 1a at the end of the pipe. Retaining flange 2 that can come into contact with
To configure the pipe end forming apparatus used when expanding forming the tube a, as shown in FIGS. 2 to 5, a surrounding frame 5 having a gripping handle 4,
A fixed grip part 6 that can grip and fix the tube 2 and release the fixation, a screw mechanism 7 as a pressing mechanism that can move in and out along or substantially along the axis X direction of the tube 2 gripped by the fixed grip part 6; , and a forming member A that expands and molds the end of the tube 2 gripped by the fixed gripping part 6 when moved toward the fixed gripping part 6 by the screw mechanism 7.

The fixed grip part 6 has a member 6B attached to the lower part of the frame 5 that can swing open and close around the axis of the pin 6A.
At the same time, a wing nut 6E is screwed into a screw 6D that projects outward from the frame 5 through a long groove 6C cut out at the free end of the swinging member 6B. By tightening the wing nut 6E while the wing nut 6B is closed, the swinging member 6B and the lower frame portion 5 of the frame 5 are tightened.
The pipe 2 is gripped and fixed between the pipe A and the pipe A.

The screw mechanism 7 has a screw shaft 7B screwed into a screw hole 7A formed in the upper part of the frame 5, and a rotation operation handle 7C is attached to the upper end of the screw shaft 7B via a ratchet mechanism (not shown). It is composed of

The molded member A is constructed as follows.

a first forming tool 8 having a conical pressurizing surface 8a for pushing and expanding the end of the tube 2 gripped and fixed by the screw mechanism 7 moving toward the fixed gripping part 6; A second forming tool 9 has a flat pressurizing surface 9a for further pressing and bending the tube end expanded by the first forming tool 8 to a state perpendicular to or close to the axis thereof. , are integrally formed with their operating positions reversed by 180 degrees.

Further, a support frame 10 is attached to the lower end of the screw shaft 7B via a posture holding mechanism 13 (described later) so as to be movable along the tube axis X direction, and the forming tools 8 and 9 are attached to the support frame 10. The molding member A, which is a one-piece body, is rotatably supported around an axis Y that is orthogonal to the tube axis X direction, and by rotation around this axis Y, the first molding tool 8 and the first molding tool 8 are A posture switching mechanism is constructed which can selectively change the operating posture of the forming tool 9 with respect to the tube end.

The acute angle θ between the conical pressurizing surface 8a of the first forming tool 8 and the tube axis X is set to 30°. Note that this angle θ is not limited to 30°, but less than 45°,
Preferably in the range of 20° to 35°, most preferably in the range of 25° to
It should be within the 30° range.

On the flat pressurizing surface 9a of the second forming tool 9, a forming guide member 1 that fits inside the end of the tube 2 is provided.
2 are installed in succession.

The posture holding mechanism 13 locks a locking member 13C that can engage with recesses 13A and 13B formed at the distal end of the first molding tool 8 and the distal end of the molding guide member 12, respectively, on the helical shaft 7B. An annular receiving member 13D extending from the lower end through a through hole formed in the support frame 10 and attached to the lower end of the locking member 13C and the support frame 10 are provided with initial tension. compression spring 1
3E, and selectively engages the locking member 13C with the recess 13A or 13B, thereby locking and holding the second forming tool 9 or the first forming tool 8 in the working position. There is.

In addition, when changing the posture of both forming tools 8 and 9, the support rod 10 is in contact with the frame 5 and the spring 13E is compressed, that is, the lock member 13C is in the recessed part. 1
Handle 7 until it is detached from 3A or 13B.
By lifting the support rod 10 via C, the postures of both forming tools 8 and 9 can be easily changed with less force.

Next, another embodiment will be described.

(a) As shown in FIG. 6 or 7, the spring ball type posture holding mechanism 13 is attached to both forming tools 8 and 9.
Parallel or almost parallel to the orthogonal axis Y for attitude switching.

In the case of FIG. 6, the recesses 13F and 13G are formed on both forming tools 8 and 9, and a ball 13H that can be selectively engaged with these recesses 13F and 13G and the ball 13H are arranged in the engaging direction. A biasing spring 13I is provided on the support frame 10 side, and in the case of FIG. It is provided on the molding tools 8 and 9 side.

(b) Instead of the manual method in which the screw shaft 7B is screwed forward by repeated rocking of the handle 7C, a motor and the screw shaft 7B are linked, and the screw shaft 7B is moved by the driving force of the motor.
Configure it so that it spirals.

(c) The pressing mechanism 7 is configured using a fluid pressure cylinder.

(d) As shown in FIG. 8, the first forming tool 8 is
It consists of a roller that rotates around the tube axis as the support frame 10 rotates while in contact with the end edge of the tube 2.

Note that the posture holding mechanism 13 shown in FIG.
A recess 13 formed in the integral part of both molding tools 8 and 9
Lock pin 13 that can be engaged with J, 13K
L and a spring 13M that biases the lock pin 13L in the engagement direction.

(e) The angle of the fixed gripping portion 6 with respect to the tube axis X can be freely changed.

(f) Incidentally, in order to facilitate comparison with the drawings, reference numerals are written in the claims section of the utility model registration, but the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the tube end forming processing apparatus according to the present invention, and FIG. 1 is a partially cutaway side view showing the tube connection state, and FIGS. 2 and 3 are views during the first stage forming and the second stage forming. 4 and 5 are enlarged cross-sectional views of the main parts during the first and second stage molding, and FIGS. 6 to 8 are views of different implementations, respectively. FIG. 2 is a partially cutaway front view of a main part showing an example. 2... Pipe to be processed, 6... Fixed part, 7... Pressing mechanism, 2a... Flange, 13... Posture holding mechanism,
A... Molding member, 8... First forming tool, 8a... Conical pressurizing surface, 9... Second forming tool, X... Tube axis, θ... Angle.

Claims (1)

[Claims for Utility Model Registration] 1. A fixing part 6 that fixes the position of the pipe to be processed 2 in the tube axis direction, and the pipe to be processed 2 fixed to this fixing part 6.
a single pressing mechanism 7 that presses and moves forming tools 8 and 9 applied to the tube end in the tube axis direction to press and spread the tube end;
The forming tool 8 presses and spreads the tube end, and the second forming tool 9 further pushes and spreads the tube end that has been pushed and spread with the first forming tool 8, so that it is in a position perpendicular to the tube axis or close to it. In a pipe end forming apparatus configured to form a flange 2a, a forming member A in which the first forming tool 8 and the second forming tool 9 are integrally connected is pressed between the pressing mechanism 7 and the pipe end. The forming member A is positioned between the first forming tool 8 and the second forming tool, and is held movably along the tube axis direction. A tube end forming apparatus characterized in that the apparatus is provided with a posture switching mechanism capable of switching between the postures in which 9 acts on the tube end, and a posture holding mechanism 13 that maintains the posture of the molded member A. 2. The tube end forming device according to claim 1, wherein the fixing portion 6 grips the tube 2 to be processed. 3. The tube end forming apparatus according to claim 1 or 2, wherein the pressing mechanism 7 presses and moves the forming tools 8 and 9 by a screw operation of a screw shaft 7B.