JP2540729Y2 - Check mechanism of work identification device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a work discriminating apparatus which is attached to a processing machine for processing two types of work having different dimensions of a processing portion such as a camshaft processing machine and which is provided for determining the size of the work. In particular, the present invention is to improve a check mechanism of the work discriminating apparatus.

[0002]

2. Description of the Related Art Camshaft processing machines and the like having different dimensions 2
2. Description of the Related Art A processing machine for processing a type of workpiece is provided with a workpiece determining device for determining the dimensions of a loaded workpiece. Conventionally, this kind of work discriminating device has
As shown in FIG. 3, a discriminating limit switch 4 is provided on a slider 2 connected to the discriminating rod end via a bracket 3, and a discriminating dog 40 corresponding to the limit switch 4 is provided on a frame portion. F. The rod 1 and the slider 2 are provided so as to rise from the processing portion when the work W is loaded, and to descend toward the work clamped by the processing portion when the loading of the work is completed. The determination is made by detecting the state of the limit switch 4 for this determination.

That is, when the rod together with the slider of the work discriminating device descends toward the work, the leading end comes into contact with the work and stops. At this time, the state differs depending on whether the limit switch 4 is in contact with the determination dog 40, and the size of the work is determined.

For example, when two types of workpieces having different dimensions such as a workpiece composed of a short-diameter cam and a workpiece composed of a long-diameter cam are processed in a camshaft processing machine, the limit switch 4 for discrimination is set. When it is operated in the ON state, the limit switch contacts the discriminating dog 40 and switches to OFF for a work composed of a short diameter cam, and contacts the discrimination dog 40 for a work composed of a long diameter cam. The ON state is maintained without performing. Therefore, the detection can be made by detecting the state of the limit switch 4. For this reason, the determination dog 40 is fastened in a movable state in an appropriate range so as to be adjustable according to the size of the workpiece to be determined.

However, in the slider on which the limit switch is provided, since the operation of arranging / retracting is repeated each time the workpiece is loaded, the dog may be out of order or the limit switch may malfunction. .

[0006]

For this reason, in this type of work discriminating apparatus, since the limit switch is provided on the slider of the work discriminating apparatus, the limit switch is repeatedly operated by arranging and retracting the slider. There are inconveniences, such as disconnection or a misalignment in the arrangement position of the discrimination dog, and the reliability of work discrimination has been lacking.

Since the conventional work discriminating apparatus is not provided with a means for detecting an abnormality of the limit switch, as described above, even if a limit switch or the like relating to the discrimination of the work has occurred, the work is determined by erroneous discrimination. There is a problem in that it is processed and the yield is reduced.

The present invention has been made under the above circumstances, and a purpose thereof is to provide a check mechanism relating to the state of a limit switch used for discriminating a work, thereby erroneously discriminating the work. It is an object of the present invention to provide a work discriminating apparatus that eliminates the occurrence of defects and reduces the production of defective products.

[0009]

In order to achieve the above object, the present invention provides a work discriminating device comprising a limit switch for discriminating the size of a work loaded on a processing machine and a discriminating dog. In the apparatus, a work discriminating apparatus provided with a function checking dog corresponding to the discriminating limit switch at the time of loading a work in a frame portion of the work discriminating apparatus, and a second limit switch corresponding to the discriminating dog is provided. It constitutes.

[0010]

According to the present invention, with the above structure,
If there is an abnormality in the limit switch for determination and the dog for determination during loading of the work, the abnormality is detected by the function check dog and the second limit switch.

That is, when the slider and the rod rise during loading of the workpiece, the limit switch for discrimination also rises and contacts the dog for function confirmation, and the state of the limit switch is switched. At this time, if there is no change in the limit switch, it is confirmed that the limit switch is abnormal. At the same time, the discrimination dog fastened to the rod also rises and approaches the second limit switch disposed on the frame. If the discrimination dog is disposed at a predetermined position, it contacts the second limit switch, and it is confirmed that the discrimination dog is disposed at the predetermined position, but if there is no change in the second limit switch. It is recognized that the discrimination dog is out of order.

Therefore, since the state of the work discriminating device is confirmed at the time of loading the work, the discrimination of the work is assured and the occurrence of defective products is reduced.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS. In this embodiment,
The same components as those of the conventional structure shown in FIG. 3 are denoted by the same reference numerals, and description thereof is omitted.

FIG. 1 shows an embodiment of the present invention. Similar to the conventional structure, a slider 2 connected to a rod end of a work discriminating device is provided with a bracket 3 for discriminating a work. A limit switch 4 is provided, and a discriminating dog 40 corresponding to the limit switch 4 is provided near the frame of the rod. Further, the frame portion F
The second limit switch 5 corresponding to the determination dog 40 is arranged so that the position can be adjusted,
A function check dog 41 corresponding to the limit switch 4 for discrimination is arranged above the rod via a bracket.

The function checking dog 41 is disposed so as to be in contact with the discriminating limit switch 4 before the work W is loaded, that is, in a state where the slider 2 and the rod 1 are rising from the processing portion. You do it.
Therefore, the discriminating limit switch 4 corresponds to the discriminating dog 40 and also has a corresponding relationship to the function checking dog 41 provided on the frame portion side.

As a result, when the slider and the rod are raised before loading of the work and the limit switch 4 for discrimination comes into contact with the function checking dog 41, the state of the switch is switched, and the limit switch 4 is normally operated. It is confirmed that it works.

At the time of the rise, the dog 4 for discrimination is used.
0 also rises. The second limit switch 5 is disposed so as to correspond to the discrimination dog 40. If the discrimination dog 40 is set at a predetermined position, the state of the switch is turned off. The position is adjusted so that it can be replaced. Therefore, when the discrimination dog 40 does not contact the second limit switch 5 and the switch state does not change, it is recognized that the arrangement of the discrimination dog 40 is abnormal.

Therefore, when the slider and the rod are lifted before the work is loaded, the functions related to the work determination, such as the operation state of the limit switch for determination and the position of the dog for determination, are checked. Reliability is increased.

[0019]

[Effects of the Invention] As described above, according to the present invention,
In a work discriminating apparatus including a limit switch and a discriminating dog for discriminating a dimension of a work loaded on a processing machine, a function checking dog corresponding to the discriminating limit switch is provided at the time of loading of a work, In addition, by configuring a check mechanism in which a second limit switch corresponding to the determination dog is provided, a function related to work determination such as disconnection of the limit switch for determination or a misplaced position of the determination dog is provided. When there is an abnormality in the work, the abnormality can be confirmed at the time of loading of the work, so that an erroneous judgment by the work discriminating device can be avoided and an excellent effect of reducing the occurrence of defective products can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention.

FIG. 2 is an explanatory view schematically showing a side surface of FIG. 1;

FIG. 3 is an explanatory view showing a conventional work discriminating apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Rod 2 ... Slider 3 ... Bracket 4 ... Limit switch for discrimination 5 ... Second limit switch 40 ... Dog for discrimination 41 ... Dog for function confirmation

Claims (1)

(57) [Scope of request for utility model registration] 1. A work discriminating apparatus comprising a limit switch for discriminating a dimension of a work loaded on a processing machine and a discriminating dog, a function check corresponding to the discriminating limit switch when loading a work. A check mechanism for a workpiece discriminating apparatus, wherein a check dog is provided and a second limit switch corresponding to the check dog is provided.