JPH0614956Y2 - Press brake equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a brake device for a press.

[Prior Art] A brake device in a press is the most important part together with a clutch device in order to ensure safe and reliable press operation, and among various types, a disc type brake is said to have the highest reliability.

In FIG. 2, the disc type brake device is composed of a brake unit 10, a brake actuating means 20, and a releasing means 30. The brake unit 10 includes a disc-shaped friction plate (single plate or multiple plates) 15 between the brake body 11 provided on the frame 1 side (casing 2) and the brake hub 12 fixed to the drive shaft 5 in the axial direction. It is configured so that it can be displaced. The same applies to dry and wet methods.

Brake actuation means 2 for actuating the brake portion 10
0 is a so-called spring tightening type structure composed of a spring 21 and a pressing plate 22 that presses the friction plate 15 by the urging force of the spring 21, and is a configuration that complies with the mechanical structure standard of the power press. On the other hand, the brake release means 30 has a cylinder chamber 33 formed by a cylinder 31 fixed to the casing 2 and a piston 32 slidably mounted in the cylinder 31, and is supplied with a predetermined pressure from an air supply port 34. This is an air pressure system in which air is supplied to release the brake portion 10 against the biasing force of the spring 21. The piston 32 and the pressing plate 22 are integrally connected by fixing one end 23e of the shaft member 23. In addition, the spring 21 and the pressing plate 22
Are provided in the circumferential direction.

Therefore, if the brake portion 10 is released by applying the air pressure from the air supply port 34, the press operation can be performed, and if the air pressure is removed, the braking operation is performed by the urging force of the spring 21. is there.

Further, for safety, the control system of the clutch / brake device is required to be highly reliable, and the solenoid valves constituting the control system are required to be doubled. Furthermore, in one stroke operation, be sure to have a restart prevention function,
Measures have been taken such as providing an operation monitoring circuit such as operating air and a control auxiliary relay.

[Problems to be Solved by the Invention] As described above, the conventional safety measure is, as it were, an external additional measure to strengthen the control system for activating and releasing the brake based on the spring tightening type structure.

Therefore, no matter how carefully the above-mentioned external additional measures are provided, various modes of press operation are required in response to requests for diversification, speedup, etc., and there is a risk that the brake will not operate. It's getting stronger. It is natural that the press cannot accept the idea that such a problem can be allowed many times within a unit period.

An object of the present invention is to provide a highly reliable brake device for a press that can more reliably brake.

[Means for Solving the Problems] The present invention is to fix two sets of brake hubs, which are arranged in series in the axial direction of a drive shaft, and to correspond to the brake hubs on the frame side. And two pairs of brake parts are formed by installing friction plates between each brake body and the corresponding brake hub, and a dedicated brake operating spring and release for each brake part are formed. A cylinder device is provided.

[Operation] In the present invention, since two sets of brake devices are provided on the drive shaft and a separate brake actuating spring and release cylinder device are provided for each device, a spring as a source of brake actuating force is attached. Even if a failure of a brake device component such as a decrease in power, damage to a spring, sticking of a release cylinder device, damage to a friction plate, etc. occurs, the brake device can be surely braked with a sound one-sided device, and a brake system such as a control system A large degree of safety can be assured probabilistically as compared to external measures.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a side sectional view of this embodiment.

In the figure, the braking device includes two sets of brake parts 10A and 10B arranged in series in the axial direction of the drive shaft 5 and two sets of brake operating parts arranged corresponding to the respective brake parts 10A and 10B. It comprises means 20A, 20B and release means 30A, 30B. In addition,
Although the present embodiment is of a wet-type double plate type, the oil supply system is not shown in FIG.

The first brake hub 12A and the second brake hub 12B are fixed in series to one end portion of the drive shaft 5, and the frame 1
The casing 2 integrated with the brake hub 12A,
A first brake body 11A and a second brake body 11B are arranged corresponding to 12B. In addition,
15A (15B) is a plurality of friction plates mounted between the brake hub 12A (12B) and the brake body 11A (11B). In this way, two sets of the first brake portion 10A (11A, 12A, 15A) and the second brake 10B (11B, 12B, 15B) are formed.

Here, the brake operating means 2 of the first brake portion 10A
0A and release means 30A, and the second brake unit 1
The 0B brake actuating means 20B and the releasing means 30B have the same structure, but are provided separately and independently.

That is, the brake actuating means 20A (20B) includes a holding plate 22A (22B) and a spring 21A (21) for pressing the holding plate 22A (22B) against the friction plate 15A (15B).
B) and. Here, the spring 21A (21B) and the friction plate 15A (15B) are the inner protruding disk portion 2A forming a part of the casing 2 (the portion further protruding inward is the common cylinder 31). A plurality of them are alternately arranged with a predetermined angle in the circumferential direction.

On the other hand, the release means 30A (30B) includes a common cylinder 31 (specifically, formed inside and outside the drive shaft 5 in the axial direction) and a piston 32A (32B).
And a cylinder chamber 33A (33B) communicating with the brake release air supply port 34A (34B), and each piston 32A (32B) has a shaft member 23A (23B) integrated with the holding plate 22A (22B). The back end is stuck.

Next, the operation will be described.

When starting the press operation, each brake release air supply port 34
A predetermined working air pressure is applied to A (34B).

Then, the internal pressure of each cylinder chamber 33A (33B) increases and the piston 32A (32B) moves to the spring 21A (21B).
The pressing plate 22A (22B) is pulled back to the right side (left side) in FIG.

Therefore, the friction plate 15A (15B) does not receive a pressing force, that is, the first brake portion 10A (second brake portion 10).
B) are released together.

Here, for example, in the case of safe one-stroke operation, the brake release air supply port 34A (34) is provided immediately before the slide reaches the top dead center.
If the working air pressure applied to B) is discharged to the atmosphere by conventional means such as switching solenoid valves, each pressing plate 2
2A (22B) presses the friction plate 15A (15B) by the urging force of the spring 21A (21B), and causes the respective brakes to operate.

In this case, for example, one spring 21A, one friction plate 15A
Even if the first brake 10A does not operate because the piston 32A sticks to the cylinder 31A or the piston 32A sticks to the cylinder 31A, the other spring 21B is healthy and the second brake portion 10B is normally braked. Can operate.

Therefore, according to this embodiment, two sets of the brake parts 10 are provided.
A and 10B are provided and each brake unit 10A, 10
B independent brake actuation means 20A,
20B and the release means 30A and 30B are exclusively provided, respectively, so that the brake unit 10A (1
0B) spring 21A (21B), friction plate 15A (15B)
Even if B) is damaged or the piston 32A (32B) is stuck to the cylinder 31 (31) or the like, the other brake unit 10B (10A) brakes properly, so it is complete and reliable. You can perform various press operations.

Further, since two sets of brake parts (10A, 10B) are provided, high-speed press,
It is possible to meet the demand for a large press.

Further, since the brake actuating means 20A, 20B and the release means 30A, 30B are individually and independently dedicated to each, it is not necessary to make the control system excessively complicated, and the control system is simple and inexpensive. can do.

Although the wet type double plate type is used in the above embodiments, the present invention can be applied to the brake device (10A, 10B) itself of a dry type or a single plate type.

[Advantages of the Invention] According to the invention, two sets of brake parts are arranged on the drive shaft in the axial direction thereof, and each brake part is provided with a separate and dedicated brake operating spring and release cylinder device. Due to the configuration, even if one brake unit or the like does not operate due to a failure such as damage of its spring or friction plate or sticking of the piston, the other brake unit operates normally. Therefore, safe and reliable press working can be performed.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention, and FIG. 2 is a side sectional view of a conventional braking device. 1 ... Frame, 2 ... Casing, 5 ... Drive shaft, 10, 10A, 10B ... Brake part, 11, 11A, 11B ... Brake body, 12, 12A, 12B ... Brake hub, 15, 15A, 15B ... Friction plate, 20, 20A, 20B ... Brake actuation means, 21, 21A, 21B ... Spring (brake actuation spring), 22, 22A, 22B ... Holding plate, 30, 30A, 30B. Release means 31, 31A, 31B ... Cylinder (cylinder device), 32, 32A, 32B ... Piston, 33, 33A, 33B ... Cylinder chamber.

Claims (1)

[Scope of utility model registration request] 1. A drive shaft which is arranged in series in the axial direction of the drive shaft.
Two sets of brake hubs are fixed, two sets of brake bodies are provided on the frame side so as to correspond to each brake hub, and a friction plate is attached between each brake body and the corresponding brake hub. A brake device for a press, characterized in that a brake portion is formed, and a dedicated brake actuating spring and a release cylinder device are provided corresponding to each brake portion.