JPH0739781A - Foreign matter detector of chip crusher - Google Patents

Abstract

PURPOSE:To prevent the damage to a crusher cutter by preventing relatively large and hard foreign matter from getting mixed in a chip crusher finely grinding the cut powder discharged from a machine tool in order to facilitate post- treatment. CONSTITUTION:A pusher 7 is provided to the upper part of a chip crusher main body 4 so as to be made movable by a fluid pressure cylinder 12 and a pusher stopper 8 is fixed at the position opposed to the pusher 7 and a partition plate 13 is provided along the bottom surfaces of the pusher 7 and the pusher stopper 8 so as to be made openable and closable by a fluid pressure cylinder 14 and the pusher 7 is allowed to advance during the stop time of the intermittent feed of a chip conveyor to bond a cut powder under pressure by corrugated uneven parts 7a, 8a and, when the pusher is stopped on the way by foreign matter, a signal is outputted to stop an alarm.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foreign matter detection device for preventing foreign matter from entering a chip crusher that grinds relatively long chips generated during cutting into fine pieces for easy post-processing. Is.

[0002]

2. Description of the Related Art Conventionally, chips produced by cutting in a machine tool are most easily processed in a finely divided shape, but it is difficult to produce ideal chips depending on the material of the work, the shape of the cutting tool, the cutting conditions, etc. difficult. Therefore, as shown in FIG. 4, a chip crusher device 102 is attached to the lower side of the discharge port of the chimp conveyor 101, and chips discharged from the conveyor are finely crushed and accumulated in the chip bucket 103.

[0003]

In the tip crusher device described in the prior art, when a relatively large and hard foreign matter such as a residual material of a work or a tool dropped by mistake is mixed in the tip, the blade of the cutter 104 is a foreign matter. Bites into and stops rotating, and the drive motor stops due to overload. Therefore, there is a problem that the cutter is damaged and the life is shortened. The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a foreign matter detection device capable of preventing foreign matter from entering a crusher and eliminating damage to a cutter. Is what you are trying to do.

[0004]

In order to achieve the above object, a foreign matter detecting device for a chip crusher according to the present invention comprises:
A foreign matter detection device for preventing relatively large and hard foreign matter from mixing into a chip crusher that finely crushes relatively long chips generated by cutting, and a pusher that can move to the upper part of the chip crusher body. Is provided
A pusher contact facing the pusher is provided on the main body, a first drive means for moving the pusher is provided, a partition plate is provided so as to be openable and closable along the pusher and a bottom surface of the pusher, and predetermined when the pusher retracts. Second drive means for opening the partition plate for a period of time is provided, and means for detecting the presence or absence of foreign matter is provided by the stop position when the pusher advances.

[0005]

[Function] During the stop time of the intermittent feeding of the chip conveyor, the pusher is advanced so that the chips collected in the receiving portion between the pusher and the pusher contact are pressed against the pusher contact by the pusher. Detects contamination. When there is no foreign matter, the pusher is continuously retracted, and at the same time, the partition plate is opened for a predetermined time to send the chips to the crusher side, and after confirming that the partition plate is closed, a signal that the chip conveyor can be restarted is output. When foreign matter is mixed in, a foreign matter detection signal is output and a worker is notified by a patrol lamp or a buzzer to stop the alarm.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS This embodiment will be described below with reference to the drawings. 1 is a chip conveyor, and 2 is a bucket for collecting falling chips. A chip crusher 3 having a foreign matter detection device is installed above the bucket 2 and directly below the discharge port of the chip conveyor 1. The chip crusher main body 4 is a box body that opens vertically, and two tool shafts 5 are rotatably supported horizontally and parallel to each other at approximately the center of the lower side. A plurality of crusher cutters 6 are engaged with each other on the tool shaft 5. They are mounted so that they fit together and are rotated by a drive motor (not shown). A pusher 7 is provided on the upper side of the main body 4 so as to be movable at right angles to the axis of the crusher cutter 6 and horizontally, and a pusher stopper 8 facing the pusher 7 is fixed. To the pusher 7, two guide bars 9 which are fitted in guide holes of the main body 4 so as to be movable in the axial direction are fixed,
A dog 11 is attached to the tip of one guide bar 9. Limit switches LS1 and LS2 are attached to corresponding positions of the dog 11.

The pusher 7 and the pusher contact 8 are provided with corrugated concavo-convex portions 7a and 8a, respectively, which are engaged with each other on opposite surfaces, and a pneumatic or hydraulically driven fluid pressure cylinder 12 for moving the pusher 7 is provided. It is provided. Further, a partition plate 13 is provided so as to be movable along the bottom surface of the pusher 7 and the pusher contact 8, and a pneumatic or hydraulic fluid pressure cylinder 14 that drives the partition plate 13 is fixed on the main body 4. Limit switches LS3, LS4 for confirming opening / closing of the partition plate 13 are mounted on the fluid pressure cylinder 14, and tip guide plates 15, 16 are fixed on the pusher 7 and the pusher contact 8. Further, the chip conveyor 1 is provided with an intermittent feeding mechanism, and an electric circuit (not shown) for continuously moving the pusher 7 and opening / closing the partition plate 13 in accordance with the intermittent feeding of the chip conveyor is provided on the foreign matter detection device side. ing.

Next, the operation of this embodiment will be described. The relatively long chips sent intermittently from the outlet of the chip conveyor 1 are guided to the chip guide plates 15 and 16 to receive between the pusher 7 whose bottom is closed by the partition plate 13 and the pusher contact 8 Collect in the section. When the intermittent feeding of the chip conveyor 1 enters the stop time, the pressure fluid is sent to the rear chamber of the fluid pressure cylinder 12, the pusher 7 advances, and as shown in FIG. 3A, the pusher 7 and the wavy shape of 8 per pusher are formed. Chips are crimped and bent by the uneven portions 7a and 8a of the dog 1
1 contacts the limit switch LS2, and a confirmation signal indicating that there is no foreign matter is output.

With this signal, the pressure fluid is simultaneously sent to the front chambers of the fluid pressure cylinders 12 and 14, and the pusher 7 retracts and the partition plate 13 opens at the same time. And limit switch LS
Signal from pusher open from 1 again, limit switch LS
A signal for opening the partition plate is output from each of the four. Then, after a few seconds, the timer is activated to send the pressure fluid to the rear chamber of the fluid pressure cylinder 14 to close the partition plate 13, and the limit switch LS3 outputs a partition plate closing signal. It is possible to restart feeding.

Next, when the chip conveyor is fed again for a set time, for example, when the tool T etc. is mixed in the cutting chips accumulated in the receiving portion between the pusher 7 and the pusher contact 8, as shown in FIG. 3 (b). Further, the pusher 7 is prevented from moving forward by the tool T and cannot move to the 8 side per pusher for a set distance or more, and stops in the middle. Therefore, no signal is output from the limit switch LS2, and the next operation cannot be started. If this state continues for several seconds, the timer operates and a foreign object detection signal is output, and the operator is notified of the abnormality by a patrol lamp or a buzzer, and the machine is stopped. If a mechanism for sending the chips containing the foreign matter in the receiving portion to another bucket in response to the foreign matter detection signal is added, continuous operation can be performed without making a notification or stopping the machine.

[0011]

Since the present invention is configured as described above, it has the following effects. The chip crusher is provided with a foreign matter detection device to detect the mixture of foreign matter before the chips are crushed by the crusher cutter, so that the crusher cutter is not damaged and the life is extended.

[Brief description of drawings]

FIG. 1 is an installation state diagram of a chip crusher having a foreign matter detection device of this embodiment.

2A is a side view of a chip crusher having a foreign matter detection device, and FIG. 2B is a top view.

3A is a diagram showing a normal pusher and a meshing state of a pusher contact, and FIG. 3B is a diagram showing a pusher and a meshing state of a pusher contact when a foreign substance is mixed.

FIG. 4 is an explanatory diagram of a conventional chip crusher.

[Explanation of symbols]

4 Chip crusher body 6 Crusher cutter 7 Pusher 8 Pusher per 7a, 8a Concavo-convex part 11 Dog 12, 14 Fluid pressure cylinder 13 Partition plate LS1 to LS4 Limit switch

Claims (1)

[Claims] 1. A foreign matter detection device for preventing a relatively large and hard foreign matter from mixing into a chip crusher for finely crushing relatively long chips generated by cutting, the upper part of the chip crusher body. A pusher movably provided on the main body, a pusher contact facing the pusher is provided on the main body, a first driving means for moving the pusher is provided, and a partition plate is provided so as to be openable and closable along a bottom surface of the pusher and the pusher. A foreign matter detection device for a chip crusher, comprising: second drive means for opening the partition plate for a predetermined time when the pusher retracts; and means for detecting the presence or absence of foreign matter depending on a stop position when the pusher advances. .