JPS6123684Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to the improvement of a cylinder device, and in particular, to the improvement of a cylinder device equipped with a locking pin, in the case where the piston cannot be unlocked due to an electric circuit failure of the cylinder device. The present invention relates to a cylinder device with a locking pin having a manual operating device that can be operated.

[Prior art] For example, in a cylinder device in which the piston is returned to its original position by a return spring, after the piston has moved by a predetermined amount, fluid pressure is applied to balance the piston at that position in order to stop the piston at that position. In particular, since it is necessary to adjust the fluid pressure according to fluctuations in external pressure, conventionally, a hydraulically operated locking pin has been controlled by a solenoid valve to lock the piston.

However, in the conventional type, it was necessary to shorten the lock operation time and improve the malfunction of the lock solenoid valve. To this end, Japanese Patent Laid-Open Publication No. 2003-110003 developed a switching valve that is activated by the movement of the piston to apply hydraulic pressure to both sides of the piston for operating the lock pin depending on the position of the piston, thereby ensuring the operation of the lock pin.
There is an invention of No. 55-36693. However, the structure of this prior art is extremely complicated and difficult to make into a compact device, and there is still a need for improvement in order to equip it with a starter switch of a diesel engine, etc.

If a cylinder device equipped with a conventional locking pin that operates in this manner is used, for example, as an engine stop device for a diesel engine, the coil on the cylinder working fluid side may become disconnected due to an electrical circuit failure such as over-discharging of the vehicle's storage battery. If the piston stops working due to a drop in the pressure of the cylinder working fluid, the engine will be unable to stop, and if the lock pin cannot be released due to an electrical circuit failure, the engine will not be able to start. be.

[Purpose of the invention] The present invention was devised to solve the above problems, and is equipped with a locking pin that operates quickly, eliminates the risk of malfunction, and can easily deal with equipment failure. The purpose of this invention is to provide a cylinder device with a

[Configuration of the invention] The configuration of the cylinder device equipped with the lock pin of the present invention to achieve the above object includes a piston rod equipped with a return spring and operated by air pressure;
It consists of a solenoid valve for fluid pressure, an electromagnetically actuated locking pin and a switch for locking the piston rod in a predetermined position, the locking pin being in a locked state when the fluid pressure is applied and locking the free end of the piston rod. The feature is that the lock can be manually released by extending it outward.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a cylinder device equipped with a lock pin showing an embodiment of the present invention. In this device, when compressed air is supplied to the air passage 5, the switch 8 is switched to the contact 8b, and the power supply 7 is connected to the contact 16.
When the coil 9 is energized through B, 20a, 20b, 17b, the valve 6 rises and air is sent through the passage A, and the piston 3 moves in the direction of the arrow B.
When the groove 14 reaches the position of the lock pin 10, the lock pin 10 falls into the groove 14 under the pressure of the spring 11, and the piston 3 is mechanically locked (locked) so that the position of the piston 3 does not move.

When the lock pin 10 falls into the groove 14, the contact 2
0a and 20b come into contact with contacts 16a and 17a, respectively, and open the circuit on the side of contacts 16b and 17b, so the coil 9 is de-energized, the valve 6 is pushed out, and compressed air is supplied into the cylinders 1 beyond that. It disappears.

Next, if you want to release the lock, press switch 8.
is switched to contact 8a, and from power supply 7 to contact 16a,
When the coil 12 is energized through 20a, 20b, and 17a, the lock pin 10 is pulled up from the groove 14, and the piston 3 is returned to its original position by the force of the return spring 4. In this case, as the coil 12 is energized, the contacts 20a and 20b rise and the contact 16
b, 17b, but the contact 8b is opened by the switch 8 and the coil 9 is not energized, so the valve 6 closes the air passage 5 and at the same time opens the air hole 15. The pressure inside the cylinder 1 decreases.

Next, I will explain the manually operated mechanism.
The terminal end 22 of the piston rod 2 in the cylinder 1 is extended to form an extension 23, and the cylinder end wall 1a
is passed through, and a handle 18 that can be pulled or pushed by hand is provided on the extension part 23. The length of the extension 23 of the piston rod 2 may be determined so that the handle 18 is near the cylinder end wall 1a when the piston 3 is at the farthest position from the lock pin 10.

Next, the shaft 6a of the lock pin 10 is extended to the side opposite to the cylinder 1. This shaft 6a passes through the spring presser plate 13 with the lock pin 10 depressed into the groove 14 of the piston rod 2, so as to slightly protrude above it, and a knob 19 is attached to the end thereof.

With this structure, the cylinder device equipped with the locking pin of this embodiment can be used by pulling the handle 18 to lock the piston rod 2 when the piston 3 becomes inoperable due to an electrical circuit failure or a drop in the pressure of the cylinder working fluid. The piston 3 can be brought into the locked state by pulling it out from the cylinder 1, and when the lock pin cannot be released, the lock pin 1 can be locked by pulling the knob 19.
0 comes out of the groove 14 and the lock is released.

FIG. 2 shows a cylinder device equipped with a lock pin showing another embodiment of the present invention. In this embodiment, the piston rod 2 is extended and a handle 18 is provided outside the cylinder 1, as in the previous embodiment. The difference from the previous embodiment is that the handle 18 is configured to be able to rotate about 90 degrees, and the groove 14 and the lock pin 10 are normally kept locked by the return spring 21.

As in the previous example, if the piston 3 becomes inoperable for some reason, pull the handle 18, pull the piston rod 2 out of the cylinder 1, drop the lock pin 10 into the groove 14, and lock the piston 3, making it impossible to release the lock. When you get tired, use handle 1
As shown in FIG.
rides on the side of the piston rod 2, and if the handle 18 is pushed back into the cylinder 1, the lock will be released.

[Effects of the invention] As explained above, the cylinder device equipped with the lock pin of the present invention uses a solenoid valve only to control the pressurized fluid, operates the lock pin control by electromagnetic force, and controls both electrically. By doing so, it is possible to achieve quick operation and reliable operation, and it is also possible to make it more compact.It is effective in both cases when the piston malfunctions or when the piston unlocks malfunctions. The addition of a manual operating device that works effectively has the effect that the cylinder device equipped with a locking pin can be used safely at any time.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an embodiment of a cylinder device equipped with a lock pin, FIG. 2 is a schematic diagram of a cylinder device equipped with a lock pin showing an embodiment of the present invention, and FIG.
This figure is a partially enlarged perspective view showing the handle portion of the embodiment of FIG. 2. 1...Cylinder, 2...Piston rod, 3...
...Piston, 4...Return spring, 6...
Valve, 8... Switch, 9, 12... Coil, 10
... Lock pin, 11 ... Spring, 14 ...
Groove, 18...Handle, 19...Knob, 21...
return spring.

Claims (1)

[Claims for Utility Model Registration] (1) Consisting of a piston rod equipped with a return spring and operated by fluid pressure, said fluid pressure solenoid valve, and an electromagnetically operated lock pin and switch for locking said piston rod in a predetermined position, said lock pin: A cylinder device equipped with a lock pin, characterized in that the lock pin becomes locked when the fluid pressure is applied, and the free end of the piston rod extends outside the device to enable manual unlocking operation. (2) The piston rod is rotatable in the circumferential direction and is provided with a return spring, and an engagement groove is provided in the piston rod so that engagement with the piston rod is released by rotating the piston rod. A cylinder device equipped with a lock pin according to Claim 1 of the Utility Model Registration Claim.