JPS5847058Y2 - Hydraulic gate locking device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a locking device for a hydraulically operated gate in which a door body is raised and lowered by a hydraulic cylinder.

In this type of hydraulically operated gate, a locking device was developed in 1973 to prevent the door from falling naturally even if oil leaked from the hydraulic cylinder while the door was raised.
There is one described in Publication No. 68.

This known device is provided in parallel with a hydraulic cylinder and consists of a rack rod that moves up and down together with the door body, a pawl that engages with the teeth of the rack rod, and a hydraulic cylinder that engages and disengages the pawl.

In the case of such a locking device, since the pawl is stopped while the heavy door body is lifted, there is a risk of the pawl being broken.

In order to prevent such cutting damage, it is necessary to make the claws larger and stronger, and the pitch of the teeth of the rack rod must be correspondingly increased.

Therefore, the position of the door body must be adjusted in stages, making it difficult to finely adjust the amount of outflow.

In order to solve the above-mentioned drawbacks of the conventional device, this invention provides a male thread on the outside of the guide rod that moves up and down with the door body, and a hollow slide that moves up and down while being rotated by a worm mechanism, which has a female thread that engages with the male thread. To provide a locking device that prevents a door body from falling naturally by providing a moving body, fixing the sliding body at an arbitrary position on a guide rod, and applying the sliding body to a receiving part of a cylinder.

The details of this invention will be explained below based on the attached drawings.

In FIG. 1, 1 is a door frame, and 2 is a door body mounted in the door frame 1 so as to be able to rise and fall.

Reference numeral 3 denotes a support base which is the upper part of the door body 1. A hydraulic cylinder 4 is fixed on this base 3, and the piston rod 5 of this cylinder 4 passes through the support base 3 and is connected to the top of the door body 2. .

Reference numeral 6 denotes a pair of left and right guide rods connected on the door body 2. The rods 6 pass through the support base 3 and are parallel to the hydraulic cylinder 4, and have a male thread 7 formed on the outside.

Further, receiving portions 8 are provided on both sides of the hydraulic cylinder 4.
The guide rod 6 passes through the vertical hole of this receiving part.

Note that the portion where the guide rod 6 passes through the support base 3 is made watertight with an O-ring.

A hollow sliding body 9 is slidably attached to each guide rod 6 on a receiving portion 8 .

This sliding body 9 is provided with a slide key 10 inside its upper and lower edges, and is made unrotatable relative to the guide rod 6 by engaging with a key groove 11 provided in the guide rod 7.

An annular rotating body 12 is rotatably fitted into the sliding body 9, and the sliding body 9 is moved up and down by the upper and lower inward edges of the sliding body 9 as the rotating body 12 moves up and down.
Screw the inner female thread 2 into the male thread 7.

A pair of bearings 13 is provided on the outside of the sliding body 9, and the shafts 15 at both ends of the worm gear 14 are rotatably supported by the bearings 13, and a part of the worm gear 14 is inserted into the sliding body 9 from the opening of the sliding body 9. It is made to protrude and engage with a worm foil 16 formed on the outside of the rotating body 12.

Reference numeral 17 denotes a drive device including a motor, a speed reducer, etc., which supplies power through a flexible multi-core cord (not shown) to rotate the worm gear 14 in the forward or reverse direction.

This invention has the above-mentioned structure, and when the door body 2 is opened and closed, each worm gear 14 is rotated in the normal direction by the drive device 17 of each sliding body 9, and the worm wheel 16 meshing with the worm gear 14 is rotated in the normal direction together with the rotating body 12. Then, the guide rod 6 rises along the male thread 7, and the sliding body 9 also rises together with this.

After the sliding body 9 has reached its upper limit and stopped, the hydraulic cylinder 4 is activated to open the door body 2 to an arbitrary degree, and the rotating body 12 is reversely rotated by the driving device 17. It descends along with the sliding body 9 along with the sliding body 9, and when it hits the receiving part 8, the drive device is stopped.

This invention is based on a remote control driving device 1 that moves a rotating body 12 having a female thread that engages with a male thread 7 on a guide rod 6 as described above.
Although the sliding body 9 is moved up and down together with the rotary body 12 by freely moving forward and backward through the worm mechanism 7, the sliding body 9 is moved steplessly at the part where the female thread 7 is formed on the guide rod 6. Can be done.

Therefore, the stop position of the door body 2 locked by the sliding body 9 is also stepless, so the amount of outflow can be adjusted freely. Also, even if oil leaks from the hydraulic cylinder 4, the sliding body 9 remains in the receiving part 8. Since it is supported, there is no risk that the door body 2 will naturally descend.

Even if the male screw 7 and the female screw in the rotating body 12 that mesh with the male screw 7 are sufficiently strong and large, there is an effect that adjustment can be performed steplessly.

[Brief explanation of drawings]

FIG. 1 is a partial vertical sectional front view of a game I implementing the locking device of this invention, FIG. 2 is an enlarged vertical sectional view of the main part, and FIG. 3 is a plan view of the same. 2... Door body, 4... Hydraulic cylinder, 6
...Guide rod, 7...Male thread, 8...
...Receiving part, 9...Hollow sliding body, 10...
...Slide key, 12...Rotating body, 14.
... Worm gear, 16 ... Worm wheel, 17 ... Drive device.

Claims (1)

[Scope of utility model registration request] In a hydraulic gate in which the door body is raised and lowered by a hydraulic cylinder, a guide bar is provided on the gate body parallel to the hydraulic cylinder, a male thread is formed on the outside of this guide bar, and the guide bar is rotated with a slide key etc. A rotatable annular rotating body is installed in a hollow sliding body that is immovable and can be raised and lowered so as to move up and down together, and the female thread inside this annular rotating body is screwed into the male thread of the guide rod. A locking device for a hydraulic gate, comprising a worm gear meshing with a shaped worm wheel and a drive device for rotating the worm gear in forward and reverse directions, and a receiving part for the sliding body provided on the outside of the cylinder.