JPS60167733A - Clamper with mechanism for detecting different kind of workpiece - Google Patents

Abstract

PURPOSE:To make a clamper compact and reduce its installation cost, by attaching a different-kind workpiece detection mechanism to the work piece clamping mechanism of the clamper, and utilizing the action of the clamping mechanism to operate the detection mechanism. CONSTITUTION:A workpiece 1 is put on a base 2. A clamping cylinder 4 attached to a cylinder mounting plate 3 is operated to push down a clamping plate 6 through a clamping rod 5 to clamp the workpiece 1 between the base 2 and the clamping plate. At that time, it is detected whether the workpiece 1 is a workpiece of normal kind or different kind. If it is detected that the workpiece 1 is a workpiece 1a of different kind, a detection rod 8 comes into contact with the workpiece 1a so that the rod ascends. The ascent of the rod is transmitted to a limit switch 7 to apply an operation instructing signal to a machine. According to this constitution, a clamper is made compact and its installation cost is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clamping device having a dissimilar workpiece detection mechanism that detects dissimilar workpieces from among the workpieces fed into a machine and provides a necessary operation command to the machine.

When processing two or more workpieces with different shapes using the same machine, depending on the type of workpiece, it may be necessary to stop the machine or stop some of its operations. In such cases, conventionally, the operator who operated the entire machine visually determined the difference in the shape of the workpiece and operated the machine. However, in this visual discrimination, there is a large time delay between the discrimination and the operation.
Work efficiency is affected by the skill level of the operator, and it is easy for one operation to occur due to misunderstanding.

In addition, worker fatigue is severe.

Therefore, devices have been proposed that automatically discriminate between different types of workpieces, but conventional automatic discrimination devices of this type are equipped with a device with a dedicated operating mechanism separately from the processing machine, and the machine design Despite the compactness of the system, the actual situation is that it has become complex and large-scale, leading to an increase in equipment costs. FIG. 1 is an explanatory view showing an example of such a conventional apparatus, in which a indicates a workpiece, and ba indicates a clamp cylinder which operates to clamp the workpiece atl. The dissimilar workpiece detection mechanism in this example is operated by a detection rod d whose tip abuts against a portion C of a different shape of the workpiece a, a dissimilarity workpiece detection cylinder e actuated by the detection rod d', and the movement of the detection rod d. When the contact state of the detection rod d against the workpiece a changes, the limit switch f operates to detect that the workpiece is of a different type, and is installed separately from the processing machine. It has been established. For this reason, it is not possible to provide a device with a compact design, and equipment costs inevitably rise.

The present invention has been made in view of the above-mentioned problems of the conventional art, and aims to provide a detection mechanism capable of eliminating these drawbacks, downsizing the device, and reducing equipment costs.

The device of the present invention is a clamping device configured to move a clamp rod by the operation of a clamp cylinder and clamp the workpiece by pressing the workpiece with a clamp plate attached to the tip of the clamp rod. A detection rod is attached to the clamp plate that detects a different type of workpiece by moving when the tip portion contacts the shape characteristic part of the workpiece, and the detection rod moves when the workpiece is pressed by the clamp plate. It is characterized in that means are provided for emitting a detection signal based on the motion. That is, the present invention
To achieve the above object by simplifying the structure of the device by attaching a different kind of workpiece detection mechanism to the mechanism for clamping the workpiece of the clamping device, and configuring the detection mechanism to be operated using the operation of the clamping mechanism. It was made so that it could be done.

Hereinafter, the details of the configuration of the present invention will be explained based on the embodiments shown in the drawings.

FIG. 2 is a front view of one embodiment of a clamping device having a dissimilar workpiece detection mechanism according to the present invention, FIG. 3 is a sectional view taken along line A-A in FIG. 2, and FIG. -B sectional view.

In the figure, 1 is a workpiece, and 2 is a base on which the workpiece is placed. The cylinder mounting plate 3 of the pump device is attached to the base 2 above.
A clamp cylinder 4 is attached to the upper surface of the cylinder mounting plate 3. This clamp cylinder 4 is operated by hydraulic pressure, water pressure, pneumatic pressure, etc., and presses the workpiece 1 against the lower end of a clamp rod 5 which passes through the cylinder mounting plate 3 and is operated by the clamp cylinder 4. A clamp plate 6 is attached. Clamp plate 6
is moved up and down by the clamp cylinder 4, and the position shown by the chain line in the figure shows its raised position (position where the workpiece is not clamped). Reference numeral 7 denotes a limit switch attached to the clamp plate 6, which receives the detection of the difference in shape of the workpiece 1 due to the operation of the detection rod 8 and issues a machine operation command signal. The detection rod 8 is held by a holder 9, and the holder 9 is fastened to the clamp plate 6 with a bolt 12 via a plate 10. The detection rod 8 is provided with a hollow part as shown in FIG. 4, and a spring 11 is interposed in this hollow part. There is. In the figure, 1a is a part (shape characteristic part) of the workpiece 1 that has a different shape, and the workpiece having this shape characteristic part la, that is, a different workpiece, is clamped with the base 2 by pressing it with the clamp plate 6. In this case, the tip of the detection rod 8 comes into contact with the shape characteristic portion 1a and the front d
The detection rod 8 is pushed up against the clamp plate 6 against the biasing force of the self-spring 11. The operation of the detection rod 8 is transmitted to the limit switch 7 via the lever 13, and the limit switch 7 is activated.

When clamping a workpiece that does not have the shape characteristic part 1a, that is, a continuous workpiece, the detection rod 8 moves down together with the clamp plate 6 and does not operate because there is no contact part, so the limit switch 7 does not operate. do not.

The clamping device having a dissimilar workpiece detection mechanism of the present invention is constructed as described above, and the operations when clamping a workpiece using this device are as follows. Place object 1 on base 2 and attach cylinder mounting plate 3.
The clamp cylinder 4 attached to the plate is actuated, and the clamp plate 6 is pushed down via the clamp rod 5t to clamp the workpiece between it and the pace 2.

When the above-mentioned 2-ing is performed, detection and discrimination of workpieces with and without shape characteristic portions 1a (protrusions), that is, different types of workpieces and normal workpieces, is performed at the same time. If the workpiece (different type of workpiece) has the shape characteristic part 1at-, the detection rod 8 contacts the shape characteristic part 1a and moves upward, and the operation is transmitted to the limit switch 7 as described above, and the machine is instructed to operate. A signal is given. Workpiece without shape characteristic part 1a (
In the case of a normal workpiece), the detection rod 8 is the clamp plate 6.
The clamp plate 6 is held by a holder 9 fixed to the clamp plate 6, and is lowered together with the clamp plate 6 while being urged downward by a spring 11. Therefore, the detection rod 8 does not operate and the limit switch 7 also does not operate, so no special operation command is transmitted to the machine, and the machine performs a preset normal operation. As mentioned above, at the same time as the workpiece is clamped, different types of workpieces are immediately detected and discriminated, and the required machine operation is performed.

As is clear from the above explanation, the clamping device of the present invention has a dissimilar workpiece detection mechanism attached to the clamp mechanism that clamps the workpiece, detects and discriminates dissimilar workpieces simultaneously with the clamping operation of the clamp mechanism, and commands the machine to operate. The detection mechanism is integrated into the clamp mechanism, resulting in an extremely compact device configuration.
Equipment costs can be significantly reduced. In addition, machining work can be performed accurately and quickly without visual misidentification or time delays in operation, which has a significant effect on improving work efficiency.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing an example of a conventional dissimilar workpiece detection mechanism, Fig. 2 is a front view showing an embodiment of a clamping mechanism having dissimilar workpiece detection device #I of the present invention, The figure is a sectional view taken along the line AA in FIG. 2, and FIG. 4 is a sectional view taken along the line BB in FIG. 3. In the drawing, 1 is a workpiece, 2 is a base, 3 is a cylinder mounting plate, 4 is a clamp cylinder, 5 is a clamp rod, 6 is a clamp plate, 7 is a limit switch, 8 is a detection rod, 9 is a holder, 10 is a 11 is a spring, 12 is a bolt, and 13 is a lever. Patent applicant: Mitsubishi Heavy Industries, Ltd. Sub-agent Patent attorney: Shibu Mitsuishi (and 1 other person) Figure 1

Claims (1)

[Claims] In a clamp device configured to clamp a workpiece by moving a clamp rod by the operation of a clamp cylinder and pressing the workpiece with a clamp plate attached to the tip of the clamp rod, the tip of the clamp rod is pressed against the workpiece by a clamp plate attached to the tip of the clamp rod. A detection rod that detects a different type of workpiece by moving due to contact in rows 1 to 3 is attached to the clamp plate, and based on the movement of the detection rod due to the contact when the workpiece is pressed by the clamp plate. Clamp device 0 having a mechanism for detecting different workpieces, characterized in that it is provided with means for emitting a detection signal.