JPH0235377Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a workpiece detection device in a carriage type inter-press transfer device or the like.

(Prior Art) In the automobile industry and the like, for example, devices are used that are placed between presses and convey workpieces. However, in a carriage-type conveying device in which a workpiece unloaded from one press is loaded and a carriage travels to the other press, the workpiece may fall from the carriage during conveyance, or the carriage may run without a workpiece placed on it. In order to avoid this problem, measures are taken to check the presence or absence of a workpiece on the conveyance device. Conventionally, external wiring such as a cable carrier has been used to detect the presence or absence of a workpiece on a transport device, but the following problems have arisen.

(Problems that the invention aims to solve) That is, (1) when the carriage moves at high speed, there is a risk that the cable carrier will be worn out or cut due to being pulled; The surrounding wiring had become complicated.

The present invention is intended to solve the above-mentioned problems in the prior art, and its purpose is to detect the presence or absence of a conductive work on the carriage at the moving end of the carriage without directly connecting external wiring to the carriage. An object of the present invention is to provide a workpiece detection device that automatically checks a workpiece.

(Means for Solving the Problems) That is, the workpiece detection device of the present invention comprises a traveling platform, a carriage movably placed on the traveling platform, and an insulating plate disposed on the carriage. at least one set of insulated templates, an energization confirmation dog attached to the carriage via an insulating plate, wiring that conducts the energization confirmation dog and the template on the insulating plate, and a conductor at the moving end of the carriage. It consists of a touch switch that comes into contact with the energization confirmation dog, and consists of the energization confirmation dog and the touch switch,
When the energization confirmation dog and the touch switch are in contact with each other and a conductive workpiece is placed on the at least one set of templates, the touch switch and the traveling base are energized. shall be.

One of the templates and the energization check dog are each attached to the carriage via an insulating plate, such as a plastic plate. Since a set of templates are also placed apart from each other, if no conductive work is placed on the template, electricity will be applied between the touch switch and the travel platform even if the energization confirmation dog and the touch switch are in contact. There isn't. However, when a conductive work such as a steel panel is placed, conduction occurs between the templates, so touch switches, power check dogs, templates on insulating plates, conductive work
Electricity flows through the remaining templates, the carriage, and the carriage, or in the reverse order, so that the touch switch and the carriage are energized to detect the presence or absence of a workpiece.

The workpiece detection device of the present invention has only a wire that conducts electricity between the energization confirmation dog on the carriage and one of the templates instead of the conventional external wiring such as a cable carrier, and the wiring around the device is very simple. It's easy.

The energization between the above-mentioned touch switch and the traveling table is confirmed by a suitable electric component, such as a switch without a float, and the desired operation, ie, conveyance or movement of the workpiece, is carried out.

It is also possible to arrange a plurality of templates on the carriage and transport and move the members in sequence.

The traveling platform, carriage, template, insulating plate, energization confirmation dog, touch switch, etc. used in the workpiece detection device of the present invention can be of any desired size and shape. As for the material, ordinary conductive materials such as steel can be used. Further, the work may be any work as long as it can conduct electricity between the templates when placed on a set of templates.

Other commonly used electrical instrumentation and control devices such as computers can be used in combination as desired.

(Example) The present invention will be explained in further detail in the following example. Note that the present invention is not limited to the following examples.

FIG. 1 shows an embodiment of the workpiece detection device of the present invention. A steel panel workpiece 1 unloaded from a press is placed on templates 3 and 4 on a carriage 2. The holder 5 and the energization check dog 6 connected to the template 4 are insulated from the carriage 2 by an insulating plate 7, but in the state shown in the figure, the work 1 is connected to the templates 3 and 4.
When you get on top of it, use workpiece 1 as a medium to switch touch switch 8 → power check dog 6 → wiring 9 → holder 5 →
Since electricity flows in the order of template 4 -> work 1 -> template 3 -> carriage 2 -> carriage 10 (grounded) (or vice versa), the presence or absence of work 1 is detected. In this case, energization is confirmed using, for example, a floatless switch (not shown).
On the other hand, when the workpiece 1 is not placed on the templates 3 and 4, the templates 3 and 4 are insulated, so no electricity flows.

Since the work detecting device of the present invention is constructed as described above, it is possible to check the work at the station from which the work is taken out and the station from which the work is input, without directly connecting external wiring to the carriage 2.

FIG. 2 shows another embodiment of the invention. Presses 11 and 12 are installed on the floor, and a running platform 13 is installed between them.
is installed. Also, on the carriage 13 is a carriage 16 having two sets of templates 14 and 15.
A power check dog 17 and a touch switch 18 are attached to the ends of the carriage 16 and the carriage, respectively. In this embodiment, the movement of the workpiece 19 is divided into three stages.
That is, in the first stage, when the workpiece 19 is unloaded onto the template 14 at the left end in the figure, the detection mechanism is activated and the carriage 16 moves to the right end in the figure. Next, the workpiece 19 is lifted by a lifting tool such as a lifting magnet, and the carriage 16 is returned to the left end. Next, the workpiece 19 that had been lifted in the center of the figure is placed on the template 15 on the right side, and then placed on the template 15 on the left side.
4, new work 19 is unloaded.
Then, when the carriage 16 is moved to the right end again and the workpiece 19 is loaded onto the press 12, the detection mechanism is activated and the carriage 16 returns to the left end.

By repeating the above movements, carry 1
The workpiece 19 is automatically and quickly moved from the press 11 to the press 1 by only moving half the width of the carriage 13.
Moved to 2. Further, while the workpiece 19 is being lifted at the center by the lifting tool, operations such as changing the direction or turning it over may be performed as desired.

(Effects of the invention) As described above, the workpiece detection device of the invention automatically detects the workpiece and performs the prescribed operation by unloading and loading the workpiece at the moving end of the carriage without directly connecting external wiring to the carriage. Because of this, there is no fear of abrasion or breakage of the cable carrier etc. when the carriage moves at high speed as in the past, and the wiring around the device is also very simple.

This improves the reliability and durability of the equipment, and also improves work efficiency as the carriage can be moved faster than before, and improves safety during work as the wiring does not move with the movement of the carriage. It has various effects such as

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of the workpiece detection device of the present invention, and FIG. 2 is a schematic diagram showing the operating state of another embodiment of the workpiece detection device of the present invention. In the figure, 1, 19...Work, 2, 16...Carriage, 3, 4, 14, 15...Template,
5... Holder, 6, 17... Power check dog, 7... Insulating plate, 8, 18... Touch switch, 9... Wiring, 10, 13... Travel platform, 11,
12...Press.

Claims (1)

[Scope of utility model registration request] A carriage, a carriage movably placed on the carriage, at least one set of templates disposed on the carriage and insulated from the carriage by an insulating plate, and a template attached to the carriage via an insulating plate. The energization confirmation dog is connected to the energization confirmation dog, the wiring that connects the energization confirmation dog and the template on the insulating plate, and the touch switch that contacts the energization confirmation dog at the moving end of the carriage. A workpiece detection device characterized in that when a conductive workpiece is placed on the at least one set of templates when a touch switch is in contact with the touch switch, electricity is supplied between the touch switch and the traveling platform.