JPS6020303B2 - hoop feeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hoop feeding device having very low mechanical strength, such as a three-dimensional mesh metal hoop.

Structure of the conventional example and its problems Figure 1 is an enlarged view of a three-dimensional mesh metal A, which is a typical example of a porous hoop. As shown in Figure 2, it is processed into a hoop shape.

This type of hoop has extremely low mechanical strength, so when applying tension to the hoop 1, a drive source with a powder clutch, for example, is used to drive the hoop by changing the number of rotations depending on the load. . In this case, the configuration is the third
As shown in the figure, Hoopu's constant speed feed pinch roll 2
is rotated at a constant speed by a motor 6 with a reduction gear via sprockets 3, 4 and a chain 5.

Further, the tension pinch roll 7, which is provided downstream of the hoop 1 from the constant-speed feeding pinch roll 2 and applies tension to the hoop 1, has sprockets 8 and 9, and a chain 10.
, is rotationally driven by a drive source consisting of a powder clutch 11. In this case, the tension pinch roll 7 is inputted with a rotation speed higher than the rotation speed at a steady state, but slips due to the load, and the pinch for constant speed feeding is generated. Rotates at a synchronous speed with Roll 2. For example, the powder clutch 11 is driven by a motor 12 with a speed reducer via sprockets 13, 14 and a chain 15, but in this case, if the rotation speed of the input shaft of the powder clutch 11 does not exceed 1 pm, the main Since the torque characteristics of the motor cannot be obtained, the rotation speed of the self-powered shaft is set to be 1 pm or more.

Further, the rotational speed of the constant-speed feeding pinch roll 2 is 3 pm or less, and the speed difference is absorbed by the slip within the powder clutch 11. Therefore, when the hoop 1 is broken, the slip inside the powder clutch 11 disappears, and the hoop 1' after the breakage portion rotates faster than the normal rotational speed and runs out of control. For example, when a detection device cannot be installed in the equipment 16 that performs chemical processing, etc., the breakage of the follower hoop 1 is detected by installing a light receiver 17 immediately after the device 16. Detection is not possible until point a advances by distance b, and during that time the rotation of the input shaft of the powder clutch 11 is transmitted to the tension pinch roll 7 without slipping, so the houb 1' runs out of control after the broken part. As a result, the processing time is shortened, resulting in defective products, and if the breaking point a is not precisely guided within the device 16, there is a problem that the hoop 1 will be bent internally as it is transported by the constant speed feeding pinch rolls 2. It had

Purpose of the Invention The present invention solves the above-mentioned problems. In particular, when a hoop breaks during transportation, it instantly detects the breakage, automatically stops feeding the hoop, and removes the hoop remaining in the device. It is an object of the present invention to provide a hoop feeding device capable of drawing out at a constant speed.

Structure of the Invention The present invention provides a tension pinch roll downstream of a pinch roll for constant-speed feeding of the hoop, and is configured to drive the tension pinch roll via a clutch that slips depending on a load in order to apply tension to the hoop. ,
A detector detects abnormal rotation speed of the tension pinch roll due to breakage of the hoop, stops the constant-speed feeding pinch roll, and drives the tension pinch roll with a separately provided drive device for hoop discharge, thereby preventing hoop breakage. This prevents the hoop from being driven faster than a predetermined speed caused by this.

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings.

In FIGS. 4 and 5, parts that are the same as those of the conventional example are given the same numbers and their explanations are omitted.

18 is a rotating disk attached to the tension pinch roll 7, and as shown in FIG. 5, this rotating disk 18 has a large number of holes 19 formed at equal pitches.

Rotating disk 1 on the tension pinch roll 7
This detector 20 has an optical receiver 42 attached to the part corresponding to the hole 19, and detects the constant velocity of the rotating disk 18. Due to the rotation, the output of the optical receiver 42 changes to the 6th output during normal operation.
As shown in the figure, the pulse waves have constant intervals, but at the time of breakage, an abnormality occurs in the pulse intervals after the break point a, as shown in FIG. 7.

Next, referring to FIG. 8, a system diagram of a device for automatically discharging the hoop 1' by the device 16 after the hoop 1 is broken will be explained.

When the hoop 1 breaks, the load on the tension pinch roll 7 becomes lighter and the rotational speed of the tension pinch roll increases. When this is detected by the detector 20, the excitation of the powder clutch 11 is canceled as will be described later, and the sprocket 9 begins to rotate freely. At the same time, the electromagnetic clutch 21 is excited, and the tension pinch roll 7
Sprocket 8, chain 10, sprocket 22,
Shaft 23, 2-row sprocket 24, chain 25,
Sprocket 26, electromagnetic clutch 21, sprocket 2
7. Chain 28 and sub. It is rotated at a constant speed by a motor 3 with a speed reducer via the socket 29. Here, the rotational speed of the tension pinch roll 7 is set to be almost synchronized with the rotational speed of the constant-speed feeding pinch roll 2, so the hoop 1' after the broken part is almost the same as if it were fed without breaking. Since they pass through the device 16 at the same speed, processing defects will not occur.

Furthermore, 31a and 31b are bearing units that hold the shaft 23. In the steady state, the electromagnetic clutch 21 is de-energized, so the sprocket 26 is free and rotated by the torque of the powder clutch 11. FIG. 9 is a block diagram showing the control system, in which the pulse wave 32 is transmitted to the optical receiver 4 by the rotation of the rotating disk 18.
Occurs in 2.

The timer 36 starts counting at the instant of 33, which is OFF when the receiver 42 is cut off, and at the instant of 34, when it is ON, the timer 36 finishes counting and returns to its original position to wait. . Here, when the count of the timer 36 exceeds the count value of the timer setting 35, it is considered normal and preparations are made for the next count, but if it does not exceed the count value, that is, when the pulse interval becomes narrow, an abnormality signal 37 is issued and the hoop is first detected. A warning and display 38 are issued to indicate the failure, and the motor 6 is stopped by the motor stop circuit 39.

Further, the powder release circuit 40 releases the powder clutch 11, and the electromagnetic clutch excitation circuit 41 also excites the electromagnetic clutch 21, thereby moving the tension pinch roll 7 at a constant speed almost synchronized with the constant speed feeding pinch roll 2. Rotate. As a result, if the hoop 1 breaks in the device 16, the moment is detected and the rotation of the constant speed feed pinch roll 2 is stopped, so the supply of the hoop is stopped and the hoop 1' remaining in the device 16 is stopped. is pulled out by tension pinch rolls 7 at a steady speed.
Effects of the Invention As described above, according to the present invention, breakage of the hoop can be instantaneously detected due to an abnormal rotational speed of the tension pinch roll, which is rotationally driven by a drive source via a clutch that slips when a load exceeds a predetermined load. At the same time, this detection causes the pinch roll for constant-speed feeding of the hoop to stop, which prevents the hoop from bending inside the device.Furthermore, the hoop after the cut point is ejected at a constant speed, which is faster than the conventional method. In this way, it is possible to prevent the hoop after the cut portion in the device from going out of control, and by shortening the processing time, it is possible to prevent products using expensive three-dimensional mesh metal from becoming defective.

Further, if the tension pinch roll is rotationally driven by a powder clutch, the tension force of the hoop is stabilized due to the characteristics of the powder clutch, and its control becomes easy. In the above embodiment, only hoop breakage was detected, but even if the rotation of the tension pinch roll is stopped due to foreign matter getting caught in it, the pulse wave interval of the pulse generator becomes infinitely long. By detecting this instantaneously using the same method as in the above embodiment, it is possible to prevent the occurrence of defective products.

[Brief explanation of the drawing]

Fig. 1 is an enlarged view of a three-dimensional mesh metal hoop, Fig. 2 is a perspective view of a three-dimensional mesh metal hoop, Fig. 3 is a front view of a hoop feeding device showing an embodiment of the present invention, and Fig. 4 is a top view of the hoop. Figure 5 is a perspective view of the pulse generator, Figure 6 is a waveform diagram of steady pulses,
FIG. 7 is a pulse waveform diagram when the hoop breaks, FIG. 8 is a drive system diagram of the tension pinch roll, and FIG. 9 is a control system block diagram. 1...Hoop, 2...Pinch roll for constant speed feeding, 7...Tension pinch roll, 11.../f powder clutch, 20...Detector, 30...・・・
Motor with reducer. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9

Claims (1)

[Scope of Claims] 1. A pinch roll for constant speed feeding of the hoop, a tension pinch roll provided downstream of the hoop flow from the pinch roll and applying tension to the hoop, and a tension pinch roll for applying tension to the hoop. a tension pinch roll drive source that drives the tension pinch roll through a clutch that slips due to a predetermined load;
A detector for the rotation speed of the tension pinch roll and a measurement signal from this detector detect an abnormality in the rotation speed of the tension pinch roll, and stop the constant speed feed pinch roll, and also stop the tension pinch roll. A hoop feeding device consisting of a discharge device that is driven at approximately the same rotational speed as the pinch roll for constant speed feeding during steady state. 2. The hoop feeding device according to claim 1, wherein the clutch that slips due to the load of the tension pinch roll is a powder clutch.