JPH0114362Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a workpiece clamping device for inserting and removing a workpiece into and from a press mold.

(Prior art) Conventionally, in this type of device, the clamp hand section that grips the workpiece and the vacuum hand section that vacuum suction the workpiece are used depending on the type of workpiece. It is known that the entire hand section can be replaced by being attached to and detached from an arm section attached to the main body of the press machine.

(Problem to be solved by the invention) However, in such a conventional workpiece clamping device, both the clamp hand section and the vacuum hand section are provided with, for example, an air cylinder necessary for positioning the workpiece. Considering the relatively large overall weight of approximately 20 kg, it was not necessarily easy to attach and detach the device.

(Purpose of the invention) This invention was made by focusing on these conventional problems, and it is possible to grip a workpiece by making it possible to use the vacuum hand part with the clamp hand part attached. To provide a work clamping device which can omit the work of replacing a clamp hand part or a vacuum hand part and can selectively operate each hand part.

(Means for Solving the Problem) In order to achieve the above object, the work clamp device according to the present invention includes a guide rod that extends toward the work in the work processing section and has a stopper at the end on the work side. an upper frame that is slidably provided on the guide rod and that holds the work; and a lower frame that is rotatably provided on the upper frame and that engages with the stopper to hold the work together with the upper frame. and a pneumatic drive unit that is attached to the guide rod and moves the upper frame forward and backward with respect to the workpiece, and the clamp hand unit has an arm that can freely move forward and backward with respect to the workpiece processing unit. In the work clamp device, the pneumatic drive unit is driven by an air control means, a mounting member is provided on the upper frame of the clamp hand unit, and a vacuum hand unit that attracts the workpiece is attached to the mounting member. Detachably installed,
This vacuum hand section is characterized in that it is connected to the air control means via a telescopic air hose.

(Function) According to the work clamp device according to the present invention, the vacuum hand section is removably attached to the mounting member of the upper frame constituting the clamp hand section, and the vacuum hand section is connected to the air control means and expandable and retractable. Since it is connected via a hose, the vacuum hand section can be operated with the clamp hand section attached, and when the workpiece is not clamped by the clamp hand section, the workpiece can be suctioned by the vacuum hand section.

(Example) Hereinafter, an example of this invention will be described based on the drawings.

First, to explain the configuration, reference numeral 1 in FIG. 1 is a main body of a workpiece processing device, and a holding member 2 (fixed base) is protruded from the upper side of this main body 1, and the base end of an arm portion 3 is attached to this holding member 2. is rotatably attached. A clamp hand section 4 is fixed to the tip of the arm section 3 via a bracket 9, and the clamp hand section 4 is adapted to grip and hold a workpiece 5. In addition, codes 6, 7
8 are molds (work processing parts) disposed inside the main body 1 at the upper and lower parts thereof, and 8 is a conveyor that transports the work 5 gripped by the clamp hand part 4 in order to transfer it to another work process. It is. Further, M is a worker who monitors the press work.

FIG. 2 is a diagram showing the configuration of the clamp hand section 4. The clamp band section 4 includes a guide rod 10 fixed to a bracket 9 and an air cylinder 11.
(pneumatic drive section), an upper frame 13, and a lower frame 14.

The guide rod 10 extends toward the molds 6 and 7, and a stopper 18 is formed at the tip of the guide rod 10 on the workpiece side. An air cylinder 11 is attached to the guide rod 10. The air cylinder 11 has a piston rod 12 that moves forward and backward toward the workpiece 5. An upper frame 13 is attached to the tip of the piston rod 12, and the upper frame 13 is slidable while being guided by the guide rod 10. A lower frame 14 that holds the workpiece 5 together with the upper frame 13 is rotatably attached to the middle part of the upper frame 13 around a support shaft 15, and the upper frame 13 moves toward the molds 6 and 7. When the engagement arm 19 of the lower frame 14 engages with the stopper 18 of the guide rod 10, the clamp parts 16, 1 of each frame 13, 14 are closed.
The workpiece 5 can be held between the two. The upper frame 13 can move between the stopper 18 and the end of the air cylinder 11, and the upper frame 13 moves forward and backward by feeding pressurized air through air hoses 20 and 21 connected to the air cylinder 11. This can be done depending on the situation.

The upper part of a mounting member 22 is fixed to the lower end of the upper frame 13 with a bolt 23, and a half-moon-shaped insertion hole 24 is provided in the lower part of the mounting member 22 in the axial direction of the guide rod 10. (See Figure 3). A mounting bolt 27 provided on a mounting portion 26 of a vacuum hand portion 25 shown in FIG. 4 is inserted into the insertion hole 24 of the mounting member 22. As shown in FIG. As shown in FIG. 5, the mounting bolt 27 has
A nut 28 is screwed onto the tip end, and the vacuum hand section 25 is fixed to the mounting member 22.

A cone-shaped suction portion 29 constituting a negative pressure generating mechanism is provided at the tip of the vacuum hand portion 25. As shown in FIG. 8, this suction portion 29 is composed of a ventilate member 29A on the proximal end side and a truncated conical cylindrical cone member 29B attached to the lower part of the ventilate member 29A. One end of the throttle passage 29a of the ventilator member 29A is connected to the tip of the vacuum hand portion 25, and the other end is open to the atmosphere.
In addition, the ventilate member 29A has a throttle passage 29.
A passage 2 communicating with the throat of a and the cone member 29B
9b is provided. Vacuum hand part 25
An air hose 30 is connected to the base end side of the ventilator member 29A, and when pressurized air is supplied from the air hose 30 to the adsorption section 29, the constriction passage 29a of the ventilate member 29A is connected. The pressure of pressurized air is at its minimum and its velocity is at its maximum at the throat. When the pressurized air is increased in pressure and accelerated, the air in the cone member 29B is sucked in from the passage 29b, and negative pressure is generated in the cone member 29B of the adsorption section 29.
Workpiece 5 is attracted. Vacuum hand part 25
One end of the air hose 30 connected to the upper frame 13 can be bent as the upper frame 13 moves forward and backward.
The other end of the air hose 30 is connected to the air hose 20 via a joint 31. As shown in FIG. 6, an air control section 32, which is air control means, is provided upstream of the joint 30 of the air hose 20.

The air control unit 32 includes a Jyo valve 33, a pressure reducing valve 34, an air source 35, a solenoid 36, and a pressure reducing valve 34, an air source 35, and a solenoid 36.
It is roughly constructed by a control circuit (not shown) that controls the .

There is an air hose 2 on the downstream side of the Jyo valve 33.
0 and 21 are connected, and an air source 35 is connected to the upstream side of the Joe valve 33 via a pressure reducing valve 34. The Joe valve 33 is controlled by a solenoid 36 controlled by a control circuit, and is configured to be able to switch the supply direction of pressurized air from the pressure reducing valve 34. The solenoid 36 supplies pressurized air to the air cylinder 11 via the air hose 20 in order to move the upper frame 13 toward the workpiece 5 when the workpiece 5 is being held, and rotates the arm 3 to move the workpiece onto the conveyor 8. In order to move the upper frame 13 to the air cylinder 11 side when placing the
The Jyo valve 33 is configured to supply pressurized air to the
Perform the switching operation.

Next, the operation of the device configured in this way will be explained.

First, the upper mold 6 is raised by the operation of the operator M, and the workpiece 5 is set on the lower mold 7, and then the upper mold 6 is lowered to mold the workpiece 5. After molding, the upper mold 6 is raised and the piston rod 12 of the air cylinder 11 is advanced at the position of the arm 3 shown by the solid line in FIG. As a result, when the frames 13 and 14 move forward and the upper frame 13 comes into contact with the stopper 18, the forward movement of the piston rod 12 of the air cylinder 11 is stopped, and the forward movement of both frames 13 and 14 is also stopped. While the frames 13 and 14 are moving forward, the engagement arm 19 of the lower frame 14 is engaged with the guide rod 10.
Both clamp parts 16,
17 is open. When the upper frame 13 contacts the stopper 18, the engagement arm 19 engages the cam surface 1.
8a to rotate the lower frame 14, and both clamp parts 16 and 17 shift to the closed state. When both clamp parts 16 and 17 shift to the closed state,
When the end of the workpiece 5 is inserted between the clamp parts 16 and 17, the workpiece 5 is inserted between the clamp parts 16 and 17.
17 (see Fig. 7). When the press-molded product 5 is clamped by both clamp parts 16 and 17, the arm 3 rises and stops at the position shown by the imaginary line in FIG. The stop position of the arm 3 is set by a timer (not shown), and at this stop position, the piston rod 12 of the air cylinder 11 moves back to open both clamp parts 16 and 17. Therefore, the workpiece 5 held between the clamp parts 16 and 17 becomes free and placed on the conveyor 8.

Next, when the workpiece is a workpiece such as an outer panel of an automobile, which should be held while minimizing surface damage, it is desirable to use the vacuum hand section 25. In such a case, the vacuum hand section 25 is attached to the attachment member 22 of the clamp hand section 4. At this time, the air hose 30 of the vacuum hand section 25 is connected to the air hose 20 of the air cylinder 11 via the joint 31.

When the press molding of the workpiece 5 is completed, the jaw valve 33 is operated to move the piston rod 12 of the air cylinder 11 forward. As a result, the vacuum hand section 25 moves forward together with the upper frame 13, but at this point, a predetermined gap is formed between the suction section 29 and the workpiece 5. Next, the forward movement of the piston rod 12 is stopped by the contact between the upper frame 13 and the stopper 18, and both clamp parts 1 are stopped.
6 and 17 are in the closed state, the arm 3 rotates and the suction section 29 suctions the workpiece 5. While maintaining this suction state of the workpiece 5, the arm 3 is rotated so as to be positioned above the conveyor 8, and the conveyor 8
When the arm 3 is stopped above and the air control section 32 is controlled to stop the air supply to the air hose 30, the inside of the suction section 29 of the air hose 30 becomes positive pressure, and the press molded product 5 becomes free. It is placed on the conveyor 8.

Next, when it becomes necessary to use the clamp hand section 4 again and the vacuum hand section 25 interferes with the molds 6, 7, etc. and cannot clamp the workpiece 5, the vacuum hand section 25 is attached to the mounting member 22. , and disconnect the air hose 30.

Furthermore, depending on the shape of the workpiece 5, if the workpiece 5 is to be clamped by the clamp hand section 4 and also adsorbed by the vacuum hand section 25, the workpiece 5 may be clamped with the vacuum hand section 25 attached to the mounting member 22. This makes it possible to perform both adsorption and adsorption operations.

In the above-mentioned embodiment, the case where the work 5 is taken out from between the press dies has been explained, but it goes without saying that the case where the work 5 is inserted between the press dies can be similarly explained.

(Effects of the invention) As explained above, according to this invention, the vacuum hand section can be operated with the clamp hand section attached, so it is easy to switch between the clamp hand operation and the vacuum hand section operation. This eliminates the need for replacing the clamp hand and the vacuum hand part as in the past. Moreover, since the pneumatic drive section and air control means of the clamp hand section can be used in common as the pneumatic drive section and air control means of the vacuum hand section, it is possible to reduce costs by reducing the number of parts. .

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram illustrating the entire device according to the present invention, Fig. 2 is a front view of the clamp hand section,
Figure 3 is a cross-sectional view of the mounting member in Figure 2;
The figure is a front view of the vacuum hand section, FIG. 5 is a front view explaining the state in which the vacuum hand section is attached to the clamp hand section, and FIG. 6 is a pneumatic circuit diagram explaining the pneumatic system of this device. FIG. 7 is a front view illustrating the gripping state of the clamp hand, and FIG. 8 is a sectional view of the negative pressure generating mechanism. 2... Holding member (fixed base), 3... Arm part, 4... Clamp hand part, 10... Guide rod, 11... Air cylinder (pneumatic drive part), 1
2... Air piston, 13... Upper frame, 1
4... Lower frame, 18... Stopper, 18a
...Cam surface, 5... Work, 6, 7... Mold (work processing section), 20, 21... Hose, 22...
Mounting member, 25... Vacuum hand part, 29...
...Adsorption section, 30...Air hose, 32...Air control means.

Claims (1)

[Claims for Utility Model Registration] A guide rod that extends toward the workpiece in the workpiece processing section and has a stopper at its end on the workpiece side, and an upper part that is slidably provided on the guide rod and that holds the workpiece. a frame, a lower frame which is rotatably provided on the upper frame and which clamps the workpiece together with the upper frame by engaging with the stopper; a lower frame which is attached to the guide rod and moves the upper frame forward and backward with respect to the workpiece; The clamp hand section includes a pneumatic drive section for moving the workpiece, and the clamp hand section is attached to an arm that can move forward and backward with respect to the workpiece processing section, and the pneumatic drive section is configured to move the workpiece driven by the pneumatic control means. In the clamp device, a mounting member is provided on the upper frame of the clamp hand portion, and a vacuum hand portion for adsorbing the workpiece is removably provided on the mounting member;
A work clamping device characterized in that the vacuum hand section is connected to the air control means via a telescopic air hose.