JP2587990B2 - Tightening brake device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a sluice gate opening / closing device for opening / closing a sluice door via a gear transmission. (Battery brakes, mechanical brakes, etc.) to lower the gates together, and when closing the gates, tightening the watertight rubber and holding the gates while keeping them tight. is there.

(Prior art)

FIG. 2 shows an example of a conventional gate opening / closing device of this type. 1 is a handle, 2 is a mechanical brake, 3 is a multi-plate clutch mechanism, 4 is a rotating shaft, and 5 is a centrifugal brake.
A gear transmission is formed by the pinion 6, the gear 7, the pinion 8, and the gear train meshing therewith, and the gear at the low-speed end drives the elevating shaft connected to the water gate up and down,
The gate is opened and closed. As for the direction of rotation of the handle 1, 9 is the opening direction and 10 is the closing direction.

[Problems to be solved by the invention]

In such a conventional device, it is difficult to apply a force for tightening the watertight rubber by the handle 1 and to hold the force.

Therefore, watertightness cannot be maintained and water leakage will occur.
It was not possible to use a self-falling type water gate opening and closing device for the intake gate and the control gate.

The present invention is intended to solve the above-mentioned problems, and can maintain a lock in a tightened state, and therefore, it is possible to use a self-weight drop type water gate opening and closing device also for intake gates and water control gates that require watertightness. It is an object of the present invention to provide a tightening brake that can be used.

[Means for solving the problem]

According to the present invention, the lifting shaft connected to the gate is driven through a gear transmission mechanism to raise the shaft, thereby opening the gate, and closing the gate using both the own weight action and the braking action of the gate. In the tightening brake device for a water gate opening and closing device, a part of the rotating shaft of the gear transmission mechanism is rotatably and axially movably supported, and a rotating shaft screw part is provided on a part of the rotating shaft. A drive-side screw portion which is screwed with the rotary shaft screw portion, rotates integrally with a drive mechanism on the drive side with respect to the rotary shaft, and is axially constrained, and wherein the rotary shaft screw portion is The rotary shaft screw portion has stoppers at both ends of a movement range that is screwed to the side screw portion and moves in the axial direction, and a fixed brake plate having a brake surface perpendicular to the rotary shaft is provided. Opposed to each other with a one-way clutch A rotary brake plate attached to the rotary shaft and held so as to be movable in the axial direction with respect to the rotary shaft. The rotary brake plate faces a surface of the rotary brake plate on the side opposite to the fixed brake plate, and is rotatable with respect to the rotary shaft. A tightening brake characterized by comprising a pressing plate movably supported in the axial direction of the rotating shaft, wherein the pressing plate is biased from the rotating shaft toward the rotating brake plate. is there.

(Operation)

According to the present invention, when the gate is lowered using its own weight, the rotating shaft receives a torque in the closing direction due to the weight of the gate, rotates with respect to the drive-side screw portion, and approaches the drive mechanism by screwing. As described above, the stopper abuts, and the screw portion is locked. Therefore, the drive mechanism and the rotating shaft are integrated, and by the action of the mechanical brake,
For example, in the case of manual operation of the steering wheel, a low-speed self-weight descent is performed according to the movement of the steering wheel.

When the sluice door reaches the bottom of the water, the watertight rubber is compressed by the weight of the sluice door, and a sealing force is generated. With the watertight rubber deformed until the reaction force of the watertight rubber balances with the weight of the gate, the torque due to the weight of the gate becomes zero.

Furthermore, when the handle is turned in the closing direction, the rotating shaft is turned in the closing direction by the torque transmission of the locked screw part, the water gate door is pushed downward through the elevating shaft by the gear mechanism, and further compressive force is applied to the watertight rubber, Retighten. At this time, the handle receives the reaction force of the tightening force.

When the watertight rubber is further compressed and the reaction force increases, the torque due to the reaction force overcomes the lock torque of the rotary shaft screw portion, and the lock is released. At this time, the deformation of the watertight rubber partially returns, and the rotation shaft temporarily reverses slightly in the opening direction and stops. Still further, when the handle is turned in the closing direction, since the rotating shaft is stationary, the rotating shaft is rotated in the opening direction relatively to the driving mechanism, and the rotating shaft moves away from the driving mechanism.

Then, the pressure plate urged from the rotating shaft moves toward the fixed brake together with the rotating shaft, comes into contact with the rotating brake plate at a certain position, and presses the rotating brake plate against the brake surface of the fixed brake plate. .

When the handle is still rotated in the closing direction, the rotation shaft has stopped rotating, so that it proceeds to the fixed brake plate side, and the pressing force of the rotary brake plate is further increased. Finally, the other stopper of the rotary shaft screw portion abuts, the rotary shaft screw portion is locked, and the rotary shaft rotates integrally with the driving device. At this time,
Since the rotating shaft is rotating in the closing direction relatively to the rotating brake plate stopped by the pressing force, the one-way clutch is in a free state, and the rotation of the rotating shaft is not hindered.
Therefore, when the handle is turned in the closing direction, the rotating shaft turns in the closing direction, and the water gate presses the watertight rubber to retighten.

The reaction force of the retightening at this time is also transmitted to the handle, and the degree of retightening can be felt by the force received by the handle.

Here, if the hand is released from the handle, the rotating shaft tends to rotate in the opposite direction by the reaction force from the compressed watertight rubber. Then, the one-way clutch acts to rotate in the direction of opening relatively to the fixed rotary brake plate, and the rotary shaft is integrated with the rotary brake plate. on the other hand,
Since the rotating brake plate generates brake torque by pressing force, if the torque due to the reaction force from the watertight rubber is within a range smaller than this brake torque, the rotation shaft will stop rotating due to this brake torque, and the watertight rubber will The compressed state is maintained while maintaining the sealing force, and the tightened state is braked and maintained.

Next, when opening the floodgate, the drive mechanism is turned in the opening direction via the handle in the opening direction. Normally, the brake torque of the rotary brake plate is larger than the lock torque of the rotary shaft screw portion. Therefore, the lock is released, and the drive side screw portion is moved by screwing so as to draw the rotary shaft toward the drive mechanism.

Then, the pressing force on the rotary brake plate decreases, the brake torque decreases, and when the brake torque decreases from the reaction force torque of the watertight rubber, the rotation shaft rotates in the opening direction by the reaction force torque.

In this way, the compression deformation of the watertight rubber gradually recovers,
The brake torque of the rotary brake plate decreases, and eventually reaches a position where the deadweight of the gate and the reaction force of the deformation of the watertight rubber are balanced.

Still further, if the handle is turned in the opening direction, the rotating shaft receives the torque of its own weight of the gate, and rotates relatively in the closing direction with respect to the driving mechanism, so it is drawn toward the driving mechanism,
At the end, the stopper abuts and the screw portion is locked. At that time, the rotating shaft is integrated with the drive mechanism, and the gate is raised by rotating the handle in the opening direction.

The above is an example of handle operation, but the same applies to the case of electric operation.

The one-way clutch may be a ball clutch or a reverse rotation prevention clutch using a ratchet mechanism in addition to the sprag clutch.

〔Example〕

 An embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 11 denotes a casing, and a coupling flange 13 of a multi-plate clutch mechanism 3 as a driving mechanism is rotatably supported via a bearing 12 while being restrained in an axial direction. Inside the coupling flange 13, a drive-side screw portion 14 of a right-hand screw is provided.

The rotating shaft 4 is provided with a right-handed rotating shaft screw portion 15 at the end of the multi-plate clutch mechanism 3, and is screwed with the driving-side screw portion 14. The opposite end is supported by a bearing 17 fixed to a brake drum 16 of the centrifugal brake 5. Bearing 17
The inner ring and the rotary shaft 4 are more loosely fitted than the outer ring, and the rotation of the coupling flange 13 rotates the drive-side screw portion 14 so as not to prevent the rotary shaft 4 from reciprocating in the axial direction. It has become. 18 is a sliding key.

When the rotating shaft 4 is rotated in the closing direction 10 relative to the coupling flange 13 of the drive function, the rotating shaft 4 is rotated by the coupling flange. It has a right-hand thread to approach 13.

A stopper 19 is fixed to the open end of the rotary shaft screw portion 15 by a screw 20, and the other end portion is a stepped shaft to be a stopper 21.
Is formed.

Reference numeral 22 denotes an adjusting screw portion provided on the rotating shaft 4, and an adjusting nut 23 is screwed thereto. The rotational position of the adjusting nut 23, that is, the position in the axial direction, is fixed to an arbitrary selected position by inserting a set screw 25 into a plurality of long holes 24 provided in the rotating shaft 4.

The adjustment nut 23 is supported by a spring through a thrust bearing 26.
27 and the guide pin 28 and the spring
29 is provided, and the pressing plate 30 is slidably held in the axial direction. The outer periphery of the pressure plate 30 is attached to the casing 11 and is slidably guided in the axial direction by a slide key 31 on the inner periphery of the brake cover 48.

A brake body 32 is mounted between the brake cover 48 and the brake drum 16, and a portion of the brake body 32 on the pressure plate 30 side forms a fixed brake plate 33 having a brake surface perpendicular to the axis.

A rotary brake plate having a brake surface on the surface opposite to the fixed brake plate 33 between the pressure plate 30 and the fixed brake plate 33
34 are deployed.

Inside the rotary brake plate 34, a sprag clutch 35 is provided as a one-way clutch.

The inner ring 36 of the sprag clutch 35 is provided so as to slide in the axial direction but transmit torque by a sliding key 37 fixed to the rotating shaft 4. The outer ring 38 accommodates a number of sprags 39 on its inner peripheral side, and the outer
A key 40 fixed to 34 is combined to transmit torque. 41 is a retaining ring, 42 is a stopper, 43 is a slat washer.

Needle thrust bearing 4 is provided between inner ring 36 and pressure plate 30.
4. The spring receiver 45 and the spring 46 are inserted. Spring receiver 45
Is fixed to the rotating shaft 4 by a spring pin 47.

 The operation will be described.

Close handle 1 to lower the gate
When turned in the direction of 10, the stopper 21 is in contact with the stopper 21 due to the torque of its own weight of the gate, and the rotary shaft screw part 15 is locked.
, The water gate is lowered by its own weight by the action of the mechanical brake 2.

When the gate reaches the bottom of the water and the reaction force of the compressed watertight rubber balances with its own weight, the torque due to its own weight disappears. When the handle 1 is further turned in the closing direction 10, the sluice door compresses the watertight rubber by the torque applied to the handle 1, and the watertight rubber is further tightened. Here, the mechanical brake 2 is disclosed in Japanese Patent Application No. 62-282093 (Japanese Patent Laid-Open No. 1-1254).
As in the case of the mechanical brake of 08), when a torque in the opposite direction to the self-weight torque is applied, the shaft of the mechanical brake moves and becomes locked, so that the torque of the handle 1 can be transmitted in the closing direction 10. .

When the handle 1 is further turned in the closing direction 10, the reaction force of the watertight rubber increases, the screw lock of the rotating shaft screw portion 15 is released, and the rotating shaft 4 is reversed in the opening direction 9 by the reaction force of the watertight rubber. Then, it stops after the watertight rubber has been restored to some extent.

When the handle 1 is further turned, the stopped rotating shaft 4 is rotated in the opening direction 9 relative to the coupling flange 13, and moves to the right away from the coupling flange 13. Due to the movement of the rotating shaft 4,
First, the rotary brake plate 34 comes into contact with the fixed brake plate 33, and then the spring 46 is contracted and the pressure plate 30 comes into contact with the rotary brake plate 34, and the pressing force gradually increases.

The rotating shaft 4 moves rightward, and finally, the stopper 19 comes into contact with the coupling flange 13 to lock the screw. If the handle 1 is still turned, the rotating shaft 4 rotates in the closing direction 10 to compress the watertight rubber again, and retightening is started. At this time, the rotary brake plate 34 is stopped by the braking force generated by the pressing force of the spring 29, but the rotary shaft 4 is free to rotate because the rotary shaft 4 is rotating in the closing direction relatively to the rotary brake plate 34, and the rotation is hindered. However, retightening is performed by operating the handle 1.

When the hand is released from the handle 1 after the tightening by an appropriate amount, the rotating shaft 4 is about to be turned in the opening direction 9 due to the reaction force of the watertight rubber, but the sprag clutch 35 is actuated and braked. It is integrated with the rotary brake plate 34. Here, the initial reaction force of the spring 29 is adjusted and set in advance by the adjusting nut 23 so that the friction brake torque generated by the pressing force is larger than the reaction force of the watertight rubber that has been tightened. In this way, even when the hand is released from the handle 1, the tightening state is reliably maintained by the braking action of the rotary brake plate 34.

When opening the sluice, by turning the handle 1 in the opening direction 9, the rotating shaft 4 in the screw lock state attempts to rotate in the opening direction 9. However, the rotation shaft 4 cannot be rotated since the rotation shaft 4 is braked by the rotation brake plate 4 due to the action of the sprag clutch 35, the screw lock state is released, and the coupling flange 13 rotates in the opening direction 9 with respect to the rotation shaft 4 to rotate. Axis 4 is pulled to the left. Then, the pressing force of the pressure plate 30 decreases, the brake torque decreases, and the brake slips when it becomes smaller than the reaction force torque of the watertight rubber,
Loose tightening.

By repeating this, the tightening force gradually loosens, and even after the water-tight rubber reaction force and the gate weight of the gate have been balanced, if the handle 1 is still turned in the opening direction 9, the stopper 21 abuts on the coupling flange 13 and the screw locks. State
Winding is performed.

〔The invention's effect〕

According to the present invention, even in a sluice gate opening / closing device in which the sluice gate is closed by using both the own weight action and the braking action, the retightening operation can be reliably performed, and the reaction force at the time of retightening is transmitted to the drive side. It is possible to perform highly reliable tightening work, and it is not possible to apply a self-weight drop type gate to intake gates and water control gates that require watertightness,
An extremely large effect is required in practical use.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, and FIG. 2 is a layout view of a conventional drive shaft. 1 ... handle, 2 ... mechanical brake, 3 ... multi-plate clutch mechanism, 4 ... rotating shaft, 5 ... centrifugal brake,
6 ... Pinion, 7 ... Gear, 8 ... Pinion, 9 ...
Opening direction, 10 ... closing direction, 11 ... casing, 12 ...
Bearing, 13… coupling flange, 14… drive side thread, 15… rotary shaft thread, 16… brake drum, 17…
... Bearing, 18 ... Sliding key, 19 ... Stopper, 20 ... Screw, 21 ... Stopper, 22 ... Adjustment screw, 23 ... Adjustment nut, 24 ... Long hole, 25 ... Set screw , 26 ... Thrust bearing, 27 ... Spring bearing, 28 ... Guide pin, 29 ... Spring, 30 ... Pressure plate, 31 ... Sliding key, 32 ... Brake body, 33 ... Fixed brake plate, 34 …… Rotary brake plate,
35 …… Splat clutch, 36 …… Inner ring, 37 …… Sliding key, 38 …… Outer ring, 39 …… Splat, 40 …… Key, 41…
… Retaining ring, 42 …… stopper, 43 …… thrust washer,
44… Needle thrust bearing, 45… Spring bearing, 46 ……
Spring, 47 ... Spring pin, 48 ... Brake cover.

Claims (1)

(57) [Claims] An elevation shaft connected to the gate is driven up through a geared electric mechanism to raise the opening, and the gate is opened, and the gate is closed using both the own weight action and the braking action of the gate. In the tightening brake device for the water gate opening / closing device as described above, a part of the rotating shaft of the gear transmission mechanism is rotatably and axially movably supported, and a rotating shaft screw part is provided on a part of the rotating shaft. And a drive-side screw portion screwed with the rotary shaft screw portion, integrally rotating with a drive mechanism on the drive side with respect to the rotary shaft, and being axially restrained, wherein the rotary shaft screw portion is A fixed brake plate having a stopper on the rotary shaft screw portion at both ends of a movement range in which the drive shaft screw portion is screwed to the drive side screw portion and moves in the axial direction, and a fixed brake plate having a brake surface perpendicular to the rotary shaft; With a one-way clutch to the rotating shaft A rotary brake plate attached to the rotary shaft and held so as to be movable in the axial direction with respect to the rotary shaft. The rotary brake plate faces a surface of the rotary brake plate on the side opposite to the fixed brake plate, and is rotatable with respect to the rotary shaft. A tightening brake provided with a pressing plate movably supported in the axial direction of the rotating shaft, wherein the pressing plate is urged from the rotating shaft toward the rotating brake plate. .