JPH0536664Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The invention is a method of forming a pipe-like material by vertically attaching a long thin material such as a film, sheet, or tape of plastic or metal and forming it into a cylindrical shape. When making the body, attach the vertical lap part (joint part)
This invention relates to an automatic tracking device for joints that automatically tracks and performs joining by welding, welding, or other methods.

<Background technology and its problems> Generally, when making a pipe-shaped molded body from a long thin material such as the one described above, depending on the forming method, the position of the joint may be partially affected by the relationship with the forming device. It may rotate in the circumferential direction and cause positional deviation. Further, when a core of a cable or the like is inserted into a pipe-shaped molded body, the core may be twisted with a certain degree of periodicity due to the twisting nature of the core. In this case as well, the joining position naturally shifts in the rotational direction.

Conventionally, to deal with such misalignment of joints,
Joining methods such as welding and welding were mainly done manually to follow the joints. For example, in the case of welding,
The movement of the welding machine was adjusted visually. Furthermore, in the case of welding plastics, etc., the welding roller and other necessary parts have a rotatable structure, and are rotated by visual inspection according to the joint.

Therefore, in addition to increasing the cost of manual joining, there is a limit to improving running speed due to visual inspection.
Due to poor workability and monotonous visual work,
Oversight was unavoidable, and the burden on the workers was heavy.

<Purpose of the invention> The present invention was made in view of the conventional situation as described above, and its purpose is that when making a pipe-shaped molded body from a long thin material, it is necessary to An automatic joint tracking device for vertically attached pipe-shaped molded bodies that automatically tracks and always joins the joint in the correct position even if the joint is slightly misaligned during travel. Our goal is to provide the following.

<Summary of the invention> In order to achieve the above object, the present invention basically focuses on the lap portion (although not necessarily the case where it wraps) of a pipe-shaped molded body that has been formed by a forming device. An auxiliary plate for detecting displacement, such as a reflector, is inserted into this lap from the intersecting direction, and an optical sensor is placed on the auxiliary plate to detect displacement of the moving pipe-shaped molded body. Then, the loading ratio of the upper thin material of the lap part placed on the auxiliary plate changes, so this change is detected by a sensor, and based on this detection signal, the joining means is automatically moved to the joining part. This is a device that allows for tracking.

<Embodiment> FIG. 1 shows an embodiment in which the device of the present invention is incorporated into, for example, a cable manufacturing device.

In the figure, reference numeral 1 denotes a cable core, which is sent out to the right in the figure by a sending device 2. Reference numeral 3 denotes a long thin material such as plastic which is to be coated vertically on the cable core 1, and is sent out in the same direction as the cable core 1 by a sending device 4, and enters a forming device 5 on the way. In this forming device 5 portion, a tape-like thin material 3 is formed into a cylindrical shape and is coated on the running cable core 1 as a longitudinally attached pipe-like formed body 3a.

A is the automatic joint tracking device of the present invention, and its front view is as shown in Figure 2.

In this device A, 6 is a rotating body that is rotatably installed around the cable core 1 covered with the longitudinally attached pipe-shaped molded body 3a produced by the forming device 5 described above.

On the back side of the rotating body 6, a welding roller, for example, is installed as a joining means 8 for joining the lap portion (joint portion) 7 of the traveling pipe-shaped molded body 3a. This welding roller is the wrap part 7.
In order to maintain good contact with the lap part 7, a coil spring 8', for example, is always pressed against the lap part 7 with an appropriate elasticity. Although not shown, an attached heating unit raises the temperature to the welding temperature of the thin plastic material.

In addition, a cable core 1 is provided on the front side of the rotating body 6.
A displacement detection auxiliary plate 9 and a sensor 10 are positioned to detect displacement of the lap portion 7 of the pipe-shaped molded body 3a vertically attached thereto. In the case of this example, the shift detection auxiliary plate 9 is made of a reflective plate whose surface is reflective of light rays, etc., and specifically, the upper thin material 7a of the lap portion 7 of the traveling pipe-shaped molded body 3a. into the lower side of the supporting member 1 in a direction perpendicular to the running direction, and the other end
1 at an appropriate position on the rotating body 6. Further, the sensor 10 adopts an optical type in accordance with the reflection characteristics of the auxiliary plate 9. Specifically, the sensor 10 is attached to the edge of the upper thin material 7a of the lap portion 7 placed on the auxiliary plate 9. They are attached to the rotating body 6 so as to face each other nearby. Note that the auxiliary plate 9 and the sensor 10 are not limited to optical types, and any type that can detect the loading ratio of the upper thin material 7a of the lap portion 7 can be used.

The rotary body 6 is further provided with an actuator 1 such as a hydraulic cylinder as a drive mechanism for rotating the rotary body 6 itself in the circumferential direction.
2 is installed. The actuator 12 is linked to the sensor 10, and is driven by a detection signal from the sensor 10 to rotate the rotating body 6 in the circumferential direction in forward and reverse directions.

According to the joint automatic tracking device A of the present invention configured as described above, due to the above-mentioned forming device 5 and the twisting of the cable core 1, the pipe-shaped formed body 3a traveling together with the cable core 1 is When the lap portion 7 is misaligned in the circumferential direction, the amount of misalignment is quickly detected by the misalignment detection auxiliary plate 9 and the sensor 10.

For example, in FIG. 2, the pipe-shaped molded body 3a
Suppose that the pipe-shaped molded body 3a rotates counterclockwise and becomes misaligned, as shown by the chain line in FIG. Since the upper thin material 7a of 7 is placed deeper, the lifting ratio is different. Naturally, corresponding to this, sensor 1
The amount of light reflected from the auxiliary plate 9 relative to 0 changes.
Therefore, the sensor 10 detects this change in the amount of reflected light and issues a detection signal to the actuator 12 to drive the actuator 12, for example, to shorten the rod 12a and rotate the rotating body 6 slightly counterclockwise. Then, as the rotary body 6 rotates, the joining means 8 installed integrally also moves, so that the welding roller as the joining means 8 will eventually move even if the pipe-shaped molded body 3a is misaligned. Regardless, the lap portion 7 will be located at an appropriate position, and uneven bonding or defective bonding will not occur.

In addition, in FIG. 2, if the pipe-shaped molded body 3a rotates clockwise and becomes misaligned, in FIG. Part of the upper thin material 7a of portion 7 comes off and is placed shallowly.
The loading ratio is also different, and the sensor 10 detects the amount of light reflected from the auxiliary plate 9 correspondingly. Then, the rotating body 6 is rotated via the actuator 12 in the opposite direction to the above. Therefore, the welding rollers serving as the joining means 8 are positioned at appropriate positions on the lap portion 7 as in the above case, regardless of the positional deviation of the pipe-shaped molded body 3a. Therefore, uneven bonding and defective bonding will not occur.

In other words, the joining means 8 can always correctly automatically track the lap portion 7 of the pipe-shaped molded body 3a.

In addition, in order to increase the amount of rotation of the rotary body 6 and to increase the amount of tracking of the lap portion 7 of the pipe-shaped molded body 3a, for example, as shown in FIG. and drive mechanism 1
2 and a connected rack 14. Alternatively, as shown in FIG. 5, a pinion 13 provided on the outer periphery of the rotating body 6 may be rotated by a gear 15 driven by a motor.

After the lap portion 7 of the pipe-shaped molded body 3a is joined as described above, a desired cable can be obtained by subsequently covering the sheath by extrusion using, for example, an extruder 16, as shown in FIG.

In addition, although the above-mentioned example explained the pipe-shaped molded object coated on the cable core, the joint automatic tracking device of the present invention is not limited to this, and various coating methods, and even It can also be applied to the case of forming a single tube body using a film-like metal plate or the like. In this case, the lap parts include not only so-called overlapping parts, but also cases where they simply come into contact with each other before joining, and if an auxiliary plate for detecting deviation is inserted into this contact part, it is possible to Detecting misalignment is possible and practicable.

<Effects of the invention> As is clear from the above description, the present invention is effective when making a vertically-supported pipe-shaped molded product from a long thin material such as a film, sheet, or tape-like plastic or metal. When joining the lap part of a lap part by welding, welding, or other methods, the automatic joint tracking device has a joining means and automatically tracks the joining means to the lap part, so first of all, no human labor is required. Therefore, it is possible to significantly reduce the joining cost. In addition, since the detection method uses sensors, it is possible to significantly increase the running speed compared to the conventional visual inspection method, and it also eliminates the possibility of overlooking positional deviations as would be the case with visual inspection, resulting in high-quality joints. can be done extremely efficiently.

[Brief explanation of drawings]

Fig. 1 is a partially omitted side view showing an embodiment in which the automatic joint tracking device for longitudinally attached pipe-shaped formed bodies of the present invention is incorporated into a cable manufacturing equipment, and Fig. 2 is a partially omitted side view showing the automatic joint tracking device of the present invention. FIG. 3 is a schematic explanatory diagram showing the state of detection of positional deviation of the lap part of a vertically attached pipe-shaped molded body, and FIGS. 4 and 5 are other embodiments of the joint automatic tracking device. It is a decisive partial front view showing. In the figure, 3...Long thin material, 3a...Vertically attached pipe-shaped molded body, 6... Rotating body, 7... Wrap portion, 7a... Upper thin material, 8... Joining means, 9
... Displacement detection auxiliary plate, 10 ... Sensor, 12
...Drive mechanism.

Claims (1)

[Scope of utility model registration request] a rotating body rotatably installed around the outer periphery of a pipe-shaped molded body formed into a circular shape by running and longitudinally attaching a long thin material in the form of a film, sheet, or tape; a joining means attached to the rotary body for abutting against the longitudinally supporting lap portion of the pipe-shaped formed body to join the lap portion; and a joining means located at least before the joining means in the running direction of the pipe-shaped formed body. an auxiliary plate for detecting deviation, which is attached to the rotating body and inserted into the lap part of the pipe-shaped molded body from the cross direction, and the upper thin material of the lap part is placed on the surface of the auxiliary plate; A sensor located directly above and attached to the rotating body detects positional deviation by a change in the loading ratio of the upper thin material of the lap portion to the auxiliary plate; A longitudinally attached pipe-shaped molded body, comprising a drive mechanism for rotating the rotating body in an appropriate direction in the circumferential direction by detection, and causing the joining means to track the lap part of the pipe-shaped molded body. Joint automatic tracking device.