JPS636451B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention involves stacking a large number of workpieces in a magazine provided on a moving material feeding device, and moving the lower one one by one in the direction of a processing mechanism by frictional running of the material feeding device. When the number of workpieces piled up in the magazine decreases and friction with the material feeding device decreases, causing slippage and unsmooth feeding, the extrusion device is automatically switched off. This invention relates to a workpiece feeding device that is operated to forcefully feed out the workpiece without much delay.

The above-mentioned known workpiece feeding device feeds the bottom sheet of a large number of workpieces stacked in a magazine by friction with the material feeding device, so when the number of stacked materials decreases, the lowest sheet in contact with the material feeding device The frictional pressure of the workpiece below decreases, causing a slip between the workpiece and the material feeding device, making it impossible to feed the workpiece in the direction of the processing mechanism. When this happens, slips occur quickly and unfeeding occurs quickly. For this reason, it is not only necessary to always replenish the magazine with workpieces so that the number of sheets exceeds a certain level, but it also cannot be replenished at the end of feeding, so there are disadvantages such as having to manually assist in feeding the materials. be. The present invention aims to eliminate such drawbacks.

An embodiment of the present invention will be described with reference to the drawings.

In the figure, 1 is a material feeding device consisting of an endless material feeding belt, 2
is a magazine attached to the upper part of the magazine with a feeding interval (L) for one piece of workpiece a, and as shown in Fig.
A is supplied and sent out in two rows in the direction of the processing mechanism. The above-mentioned delivery interval (L) is
It can be adjusted by moving up and down. A bracket 6 protruding from the frame 4 of the processing mechanism is provided on the outside of the magazine 2 on the processing mechanism side, and is used as a mounting member for a passage detection device 5 for the workpiece a. The bracket 6
A detection lever 7 whose tip protrudes in the direction of the magazine 2 is attached by a shaft 8 to the detection lever 7 . A detection roll 9 that rides on the material feeding device 1 and senses the passage of the workpiece a sent from the magazine 2 is rotatably supported on the detection lever 7, and a detection roll 9 that rises upward at the protruding end of the detection lever 7 is rotatably supported. A pressing screw 11 is attached to the arm 10 and protrudes downward from the upper bent portion of the arm 10.
Screw together. A stopper screw 12 is provided on the bracket 6, and the limit of the downward movement of the detection lever 7 approaching the material feeding device 1 is determined by this screw. A limit switch 13 constituting the signal transmitting device of the present invention is attached to the bracket 6, and an actuator 14 of the switch is pressed against the pressure screw 11.
The limit switch 13 is activated by the reset timer T and outputs a command signal. The output timing of this signal is such that the workpiece a, which is conveyed from the magazine 2 on the material feeding device 1 in a healthy state, is detected by the detection roll 9.
After contacting the lower surface, the actuator 14 descends again as the workpiece a passes, and at the same time as the actuator 14 is pushed by the pressure screw 11 that descends together with the arm 10, measurement begins, and after a short set time has elapsed, the timing is turned up by the timer T. and generate a command signal. If the subsequent workpiece a enters the lower surface of the detection roll 9 before time-up occurs after the timer T starts the above-mentioned measurement, the above-mentioned measurement is invalidated. Each of the above parts includes magazines 2, 2, processed material a,
Install two sets on the left and right to match the stacking of the two rows in a.

A pair of guide bars 15 protruding from both sides are provided on the outside of the magazines 2, 2 on the side opposite to the processing mechanism side, and sliders 16 are fitted to these guide bars so that their respective positions can be fixed by lock levers 17. A cylinder 19 is attached to a mounting plate 18 that is attached to each slider 16 and parallel to the guide bar 15.
A feed plate 21 is attached to each cylinder rod 20 for forcibly pushing out the lowest piece of workpiece a stacked in the magazine 2 in the direction of the processing mechanism.
Install via. Each slider 16 is loosened from being fixed by the lock lever 17, moves according to the scale 23 provided on the guide bar 15, and then fixed again by the lock lever 17, thereby changing the operating reference position of the feed plate 21.

To explain the operation of this embodiment, the lower ends of the workpieces a and a stacked in the magazine 2 are in contact with the material feeding device 1, so that under normal conditions there is no friction with the material feeding device. , are sequentially sent out in the direction of the processing mechanism by the running force of the device. However, if the workpiece a slips between the material feeding device 1 and the material feeding is delayed, the passing detection device 5 measures the delay time, and for example, when the timer T times up, a signal is sent from the signal transmitting device (limit switch) 13. A command signal is output, and the first and second cylinders of the cylinder 19 are controlled by the signal.
Pressure fluid is sent to the right side of the figure, and cylinder rod 2
0 and the feed plate 21 in the direction of the processing mechanism,
Each piece of workpiece a is forcibly sent out from the magazine 2.

In this embodiment, the magazine 2 has two horizontal rows of workpieces a,
A is shown in a stacked manner, but they can also be arranged in one horizontal row, three horizontal rows, or the like. Left and right cylinder 1
9 are not interlocked, and are operated by separate command signals. For this reason, only one cylinder 19 is often operated in response to a command signal.

The present invention is provided with a passage detection device for the workpiece fed by the material feeding device on the outside of the processing mechanism surface of the magazine, and the detection device outputs a command signal by detecting a delay in feeding the workpiece by the material feeding device. A signal transmitting device is installed on the outside opposite to the processing mechanism of the magazine, and an extrusion device is installed on the outside opposite to the processing mechanism of the magazine to perform one operation in response to the command signal and push out the lower one of the workpieces stacked in the magazine. , while there is a frictional force between the workpieces stacked in the magazine and successively contacting the material feeding device and the material feeding device to feed the workpieces in the direction of the processing mechanism, the magazine is closed on the opposite side of the processing mechanism. When the extrusion device installed on the outside is stopped and the stack of workpieces decreases in the magazine and slips between the lowest workpiece and the material feeding device, causing a delay in the delivery of the workpiece, the passing detection device Detects the feed delay, and in response to a command from a signal transmitting device installed in the device, the feed device is driven for the first time to cause forced extrusion, and the workpieces are piled up and replenished into the magazine. For example, the workpiece is sent out again using only frictional force as before. Since the present invention combines the conventional device with a forced feed mechanism, the operator only has to monitor and execute the replenishment of workpieces to the magazine, greatly reducing the labor burden. It has the effect that it can.

[Brief explanation of the drawing]

The attached drawings show an embodiment of the present invention, and FIG. 1 is a plan view, FIG. 2 is a side view cut along line A--A in FIG. 1, and FIG.
FIG. 4 is an enlarged side view of the same part, FIG. 5 is an enlarged separated perspective view of the part, and FIG. 6 is a partially cutaway perspective view of the magazine 2. 1 → Material feeding device, 2 → Magazine, 5 → Passage detection device, 6 → Bracket, 7 → Detection lever, 9 → Detection roll, 10 → Detection arm, 11 → Pressing screw, 1
2 → Stopper screw, 13 → Limit switch (signal transmitter), 15 → Guide bar, 16 → Slider,
18→Mounting plate, 19→Cylinder, 20→Cylinder rod, 21→Feeding plate.

Claims (1)

[Claims] 1. A large number of workpieces are stacked in a magazine provided on a moving material feeding device, and the lower one of the workpieces stacked in the magazine is sequentially sent out in the direction of the processing mechanism by frictional running of the material feeding device. In such a device, a passage detection device for the workpiece being sent out on the material feeding device is provided on the outside of the magazine on the processing mechanism side, and the detection device detects a delay in feeding the workpiece by the material feeding device and sends a command. A signal transmitting device for outputting a signal was installed, and an extrusion device was installed on the outside of the magazine opposite to the processing mechanism to perform one operation in response to the command signal and push out the lower one of the workpieces stacked in the magazine. A processing material feeding device characterized by the following.