JP2959347B2 - Chip crusher foreign substance detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foreign matter detecting device for preventing a foreign matter from entering a chip crusher for finely pulverizing relatively long chips generated during a cutting process so that post-processing is easy. It is.

[0002]

2. Description of the Related Art Conventionally, chips generated by cutting in a machine tool are most easily processed in a finely divided shape. However, it is difficult to produce ideal chips according to the material of a work, the shape of a cutting tool, cutting conditions, and the like. difficult. Therefore, as shown in FIG. 4, a chip crusher device 102 is attached below the discharge port of the chimney conveyor 101, and the chips discharged from the conveyor are finely crushed and accumulated in the chip bucket 103.

[0003]

In the chip crusher device described in the prior art, when a relatively large and hard foreign material such as a residual material of a work or a tool dropped by mistake is mixed into a chip, the blade of the cutter 104 is not crushed. And the rotation stops, and the drive motor stops due to overload. For this reason, there was a problem that the cutter was damaged and the life was shortened. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the related art, and an object of the present invention is to provide a foreign object detection device capable of preventing foreign objects from entering a crusher and eliminating damage to a cutter. What you want to do.

[0004]

In order to achieve the above object, a foreign object detecting device for a chip crusher according to the present invention comprises:
A foreign matter detecting device for preventing a relatively large and hard foreign matter from being mixed into a chip crusher for finely pulverizing a relatively long chip generated by a cutting process, wherein the pusher is movable to an upper part of the chip crusher main body. Is established,
A pusher contact facing the pusher is provided on the main body, a first driving means for moving the pusher is provided, a partition plate is provided to be openable and closable along a bottom surface of the pusher and the pusher, and a predetermined plate is provided when the pusher retreats. A second drive unit for opening the partition plate for a time is provided, and a unit for detecting the presence or absence of a foreign object based on a stop position when the pusher advances is provided.

[0005]

[Function] The pusher is advanced during the intermittent feed stop time of the chip conveyor, and the swarf accumulated in the receiving portion between the pusher and the pusher is pressed against the pusher by the pusher. Detect 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 out chips to the crusher side. After confirming that the partition plate has been closed, a signal indicating that the feed of the chip conveyor can be restarted is output. If foreign matter is mixed, a foreign matter detection signal is output, the worker is notified by a patrol lamp or a buzzer, and the alarm is stopped.

[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 up and down, and has two tool shafts 5 rotatably supported in a horizontal and parallel manner substantially at the lower center, and a plurality of crusher cutters 6 are engaged with each other on the tool shaft 5. 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 8 facing the pusher 7 is fixed. The pusher 7 has two guide bars 9 fixedly fitted in the guide holes of the main body 4 so as to be movable in the axial direction.
A dog 11 is attached to the tip of one guide bar 9. Then, 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 concave and convex portions 7a and 8a which are engaged with each other on the opposing surfaces, and a pneumatically or hydraulically driven hydraulic cylinder 12 for moving the pusher 7 is provided. 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 8, and a pneumatic or hydraulic drive hydraulic cylinder 14 for driving the partition plate 13 is fixed on the main body 4. On the fluid pressure cylinder 14, limit switches LS3 and LS4 for confirming the opening and closing of the partition plate 13 are mounted, and the tip guide plates 15 and 16 are fixed on the pusher 7 and the pusher contact 8, respectively. Further, the chip conveyor 1 is provided with an intermittent feed mechanism, and an electric circuit (not shown) for continuously moving the pusher 7 and opening and closing the partition plate 13 in accordance with the intermittent feed of the chip conveyor is provided on the foreign matter detection device side. ing.

Next, the operation of the present embodiment will be described. The relatively long chips that are intermittently sent out from the discharge port of the chip conveyor 1 are guided to the chip guide plates 15 and 16, and are received between the pusher 7 whose bottom is closed by the partition plate 13 and the pusher 8. Accumulate in the department. When the intermittent feed of the chip conveyor 1 enters the stop time, the pressurized fluid is sent to the rear chamber of the hydraulic cylinder 12, and the pusher 7 advances, and as shown in FIG. The chips are crimped and bent by the uneven portions 7a and 8a of the
1 contacts the limit switch LS2, and a confirmation signal indicating that there is no foreign matter is output.

With this signal, the pressurized fluid is simultaneously sent to the front chambers of the fluid pressure cylinders 12 and 14, and the partition plate 13 is opened at the same time when the pusher 7 is retracted. And limit switch LS
Pusher open signal from 1 and limit switch LS
4 outputs a signal for opening the partition plate. Next, after a few seconds, a timer is operated to send pressure fluid to the rear chamber of the fluid pressure cylinder 14 to close the partition plate 13 and output a signal for closing the partition plate from the limit switch LS3. Feeding can be resumed.

Next, when the chip conveyor is fed again for a set time and, for example, a tool T is mixed in the chips collected in the receiving portion between the pusher 7 and the pusher 8, as shown in FIG. The pusher 7 is prevented from moving forward by the tool T, cannot move to the pusher 8 side beyond the set distance, and stops halfway. Therefore, no signal is output from the limit switch LS2, so that the next operation cannot be performed. If this state continues for several seconds, the timer operates to output a foreign object detection signal, inform the operator of the abnormality by a signal lamp or a buzzer, and stop the machine. If a mechanism for sending out chips containing foreign matter in the receiving portion to another bucket based on the foreign matter detection signal is added, continuous operation can be performed without notification and machine stoppage.

[0011]

Since the present invention is configured as described above, the following effects can be obtained. Since the chip crusher is provided with a foreign matter detection device to detect foreign matter before the chip is crushed by the crusher cutter, damage to the crusher cutter is eliminated and the life is extended.

[Brief description of the drawings]

FIG. 1 is an installation state diagram of a chip crusher having a foreign object detection device of the present embodiment.

FIG. 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 the pusher, and FIG. 3B is a diagram showing a pusher and a meshing state of the pusher when foreign matter is mixed.

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

[Explanation of symbols]

Reference Signs List 4 Chip crusher main body 6 Crusher cutter 7 Pusher 8 Per pusher 7a, 8a Uneven portion 11 Dog 12, 14 Fluid pressure cylinder 13 Partition plate LS1 to LS4 Limit switch

Claims (1)

(57) [Claims] 1. A foreign matter detecting device for preventing a relatively large and hard foreign matter from being mixed into a chip crusher for finely grinding relatively long chips generated by a cutting process. A pusher is provided so as to be movable in the main body, a pusher contact facing the pusher is provided on the main body, 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 detecting device for a chip crusher, comprising: a second driving means for opening the partition plate for a predetermined time when the pusher retreats; and a means for detecting the presence or absence of foreign matter based on a stop position when the pusher advances. .