JPH0439527B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water gate opening/closing machine (hereinafter referred to as "opening/closing machine") for raising and lowering a water gate to open and close it.

Conventional switchgear connects the output shaft of a mobile rotating device such as an electric motor or internal combustion engine to the power transmission shaft of the switchgear, and fixes it to the output shaft using the output of the mobile rotating device via a clutch mechanism and reduction gear device. Rotate the sprocket gear that has been rotated to raise and lower the water gate, and when lowering the water gate by its own weight, release the coupling of the clutch mechanism provided on the power transmission shaft, allowing free rotation of the power transmission shaft and lowering its own weight. As a result, it is necessary to equip a clutch mechanism for lowering the vehicle's own weight, which has disadvantages such as complicating the equipment, complicating the operation, and increasing the risk of erroneous operation.

In addition, a known switch using a differential gear mechanism (Patent Publication (B2) 1984-43608) also has the disadvantage of requiring the clutch mechanism to be operated in the same way as conventional switches when lowering by weight. It was hot.

It is an object of the present invention to provide a switch which eliminates the drawbacks of the conventional switch and which is simple in structure and operation and has high safety.

The configuration of the opening/closing machine of the present invention is such that a worm gear is fixed to a pinion rotor of a differential gear mechanism, and the worm is connected to the worm gear through a gear mechanism consisting of the worm gear and a worm that constitutes a self-locking gear mechanism. An input switching connection/disconnection mechanism connected to a fixed input shaft and capable of freely connecting/disconnecting the input shaft, an output shaft of a mobile rotation device, and a manual rotation handle is provided at the input, and two side gears of the differential gear mechanism are provided. are fixed to two rotatably supported side gear shafts, and one of the side gear shafts is connected via a reduction gear mechanism to an output shaft to which a sprocket gear for raising and lowering the water gate door rack is fixed, The other side gear shaft is configured to be connected to the brake mechanism, and in addition to the input switching connection/disconnection mechanism, the structure does not include a clutch mechanism, so this configuration allows for both maneuvering and manual power. This opening/closing machine is capable of opening and closing the water gate even when the water gate is closed, and also allows the water gate to be raised/lowered and lowered by its own weight without requiring the operation of a clutch mechanism.

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

A differential gear mechanism 2 provided in a casing 1a of a water gate opening/closing machine 1 fixes a worm 5 and a worm gear 4 of a worm gear mechanism 3 together with bolts 14, and
A pinion shaft 13 rotatably supporting two pinions 6, 7 is fixed, a pinion rotor 12 is rotatably supported on a side gear shaft 11, two side gears 8, 9 meshing with the pinions 6, 7,
The worm 5 is fixed to the input shaft 15, and the worm 5 is fixed to the input shaft 15, and the worm 5 is fixed to the input shaft 15.
is connected to the input shaft 15 via the input switching connection/disconnection mechanism 16.
Input shaft coupling rings 17, 18 attached to both ends of
It is connected to an output shaft 36a of a mobile rotation device 36 such as an electric motor fixed to the casing 1a and a manual rotation handle 37.

The input switching connection/disconnection mechanism 16 is inserted into the hollow part of the input shaft 15, and has a structure that enables connection/disconnection by a spline interlocking rod 16d which is provided so as to be able to slide in the hollow part in the axial direction. 1
6d is connected at one end to a screw jack 16e equipped with an input switching handle 16a provided at the center of the boss of the manual rotation handle 37, and also connected to the input shaft 1.
5 and input shaft couplings 17, 18 are connected to each other by two splines 16b, 16c.

A reduction gear mechanism 1 is provided at one end of the side gear shaft 10.
A small gear 20 of No. 9 is fixed, and a brake drum 28 of a brake mechanism 27 is fixed to one end of the side gear shaft 11.
And the centrifugal brake hub 33 of the centrifugal brake mechanism 31 is fixed.

The small gear 20 of the reduction gear mechanism 19 has a large gear 21
The large gear 21 is fixed to an output shaft 22 rotatably supported by the casing 1a. A sprocket gear 23 is fixed to the output shaft 22, and a water gate rack 24 is connected to the water gate at its lower end.
It's meshing with each other.

As a guide for the vertical movement of the water gate rack 24,
Guide roller shaft 2 fixed to casing 1a
6, a guide roller 25 rotatably supported.
is provided on the back side of the water gate rack 24 on the side with which the sprocket gear 23 meshes.

The brake mechanism 27 is a so-called band brake in which a brake band 29 is pressed onto a brake drum 28 and braking is performed by the frictional force thereof, and the brake drum 28 is provided with a brake band 29 wrapped around its outer circumferential surface. , the brake band 29 is connected to a brake tightening device (not shown) and a brake handle (not shown).

The centrifugal brake mechanism 31 is an over-rotation prevention device for the side gear shaft 11 provided for the purpose of suppressing the rate of descent of the water gate due to its own weight. Brake casing 32
A centrifugal brake brake element 34 that generates a frictional braking force by centrifugally contacting the inner surface of the motor is swingably attached to the centrifugal brake brake element shaft 35.

Next, the operation of the switch of the present invention will be explained.

(a) When opening and closing the water gate using the mobile rotation device 36. By operating the input switching handle 16a, the input switching connection/disconnection mechanism 1 is connected via the screw 16e.
6 by sliding the spline interlocking rod 16d,
The connection between the input shaft 15 and the input shaft coupling 18 on the manual rotation handle 37 side by the spline 16c is cut off, and the input shaft 15 and the spline 16b of the input shaft coupling 17 on the mobile rotation device output shaft 36a side are connected.

Next, operate a brake handle (not shown) to tighten the brake band 29 onto the brake drum 2 through a brake band tightening device (not shown).
8, the side gear shaft 11 is braked to stop the side gear 9, and the mobile rotation device 36 is driven to rotate the mobile rotation device output shaft 36a in the forward or reverse direction. Then, the rotational force is transmitted to the connected input shaft 15 via the input shaft coupling 17, causing the worm 5 to rotate. Since the worm 5 rotates the worm gear 4 and the pinion rotor 12 also rotates together, the pinions 6 and 7 mounted on the pinion rotor 12 and meshing with the stopped sadow gear 9 rotate, and the rotation is transmitted to the worm gear 4. The generated rotational force is transmitted to the side gear 8 via the pinions 6 and 7, and the side gear shaft 10 fixed to the side gear 8 is rotated. As the side gear shaft 10 rotates, its rotational force is transferred to the reduction gear 2.
0, is transmitted to the sprocket gear 23 via the reduction large gear 21 and the output shaft 22, and the water gate rack 24 is raised and lowered by the rotational force and rotation direction (forward and reverse rotation) of the sprocket gear 23. (not shown) to open and close by raising and lowering.

Note that when the mobile rotation device 36 is stopped, the reverse rotational force generated by the weight of the water gate door and transmitted to the power transmission shaft is prevented from reversing by the worm gear mechanism 3 having a self-locking function.
The water gate door does not descend under its own weight, and the water gate door is held at the stop position.

Further, when the mobile rotation device 36 is driven, the side gear shaft 11 is stopped, so the centrifugal brake mechanism 31 does not operate.

(b) When operating the manual handle 37 to open and close the water gate.

Operate the input switching handle 16a to slide the spline interlocking rod 16d of the input switching connection/disconnection mechanism 16 via the screw jack 16e, and connect the input shaft 15 and the input shaft coupling 17 on the mobile rotation device 36 side by the spline 16d. At the same time, the input shaft 15 and the spline 16c of the input shaft coupling 18 on the manual rotation handle 37 side are
to join together.

Next, when the brake handle (not shown) is operated to brake the side gear shaft 11 and the manual rotation handle 37 is rotated, the input shaft 15 is rotated. Perform the same operation as described and open the water gate (not shown).
Raise and lower to open and close.

Note that when the rotation of the manual rotation handle 37 is stopped, the reverse rotational force of the power transmission shaft generated by the weight of the water gate door is reversed by the worm gear mechanism 3 having a self-locking function, as in the case (a) above. This prevents the sluice gate from stopping and being held in the stopped position. In addition, manual rotation handle 3
At the time of operation 7, the centrifugal brake mechanism does not operate because the side gear shaft 11 is stopped, as in the case (a) above.

(c) When lowering the water gate slowly under its own weight.

When lowering the water gate door by its own weight at a slow speed, by loosening the brake handle (not shown) and controlling the braking force of the side gear shaft 11 while gradually decreasing it, it is possible to lower the water gate door by its own weight at an arbitrary slow speed. can.

That is, when the water gate falls under its own weight, the water gate rack 24 connected to the water gate also falls, rotating the sprocket gear 23 and the output shaft 22, and the reverse rotational force is transmitted to the large reduction gear 21 and the small reduction gear. 20, the side gear shaft 10, the side gear 8, and the pinions 6, 7, which are then transmitted to the side gear 9 and the side gear shaft 11.

Now, if the braking force of the side gear shaft 11 is controlled to gradually decrease, the side gear shaft 11 and the side gear 9 will rotate at an arbitrary slow speed, so the water gate will descend at an arbitrary slow speed while being given the braking force. do. In this case as well, the centrifugal brake mechanism 31 remains in an operable state and is activated when the descending speed of the water gate becomes excessive.
Descending speed can be suppressed.

Note that if necessary, the side gear shaft 11 can be completely braked using a brake handle (not shown) to stop the water gate door from descending due to its own weight, or after stopping, the braking force of the side gear shaft 11 can be reduced. It is also possible to restart the dead weight descent at any time.

(d) When the water gate is rapidly lowered under its own weight.

If the water gate door is to be lowered by its own weight rapidly, the brake handle (not shown) is loosened to completely release the braking force of the side gear shaft 11, and only the braking force generated by the operation of the centrifugal brake mechanism 27 acts as a braking force. , by lowering its own weight at a predetermined speed.

In this case as well, the transmission of the reverse rotational force from the water gate rack 24 to the side gear shaft 11 via the sprocket gear 23 etc. is the same as in case (c), but the difference from case (c) is that The braking force of 11 is completely released and the side gear 9 is rotated only by the braking force applied by the operation of the centrifugal brake mechanism 31, without rotation suppression by the brake mechanism 27, and the water gate is kept at a predetermined speed and rapidly lowers its own weight. It's about letting people know.

In addition, as in case (c), by operating the brake handle (not shown) as necessary, the side gear shaft 11 can be braked to reduce the rate of descent of the water gate due to its own weight and change to a slow descent. Alternatively, the water gate can be completely braked to stop the water gate on the way down, or after it has stopped, it can be maneuvered or manually opened/closed, or the braking force of the side gear shaft 11 can be reduced or released to reduce its own weight. It is also possible to start again at any time.

As is clear from the above description, the present invention allows the water gate to be opened and closed using either mobile or manual power, and when raising and lowering the water gate and lowering its own weight, the present invention does not operate like a conventional opening/closing machine. There is no need to engage or disengage the clutch mechanism, and the speed of descent of the vehicle's weight can be easily controlled and stopped mid-way by simply operating the brake handle.It has excellent operability and safety, allowing for safe descent of its body weight. It has a simple structure, which facilitates maintenance and management, and it also has many practical effects, such as miniaturization.

[Brief explanation of drawings]

The drawings show an embodiment of the structure of the water gate opening/closing machine of the present invention, with FIG. 1 being a partially sectional plan view and FIG. 2 being a partially sectional side view. 1... Water gate opening/closing machine, 1a... Casing, 2
... Differential gear mechanism, 3 ... Worm gear mechanism, 4
...Worm gear, 5...Worm, 6,7...
Pinion, 8, 9...Side gear, 10, 11...
...Side gear shaft, 12...Pinion rotor, 1
3... Pinion shaft, 14... Bolt, 15... Input shaft, 16... Input switching connection/disconnection mechanism, 16a... Input switching handle, 16b, 16c... Spline, 16d... Spline interlocking rod, 16e...
...Screw jack, 17, 18...Input shaft coupling, 19...Reduction gear mechanism, 20...Reduction small gear, 21...Reduction large gear, 22...Output shaft, 23
... Sprocket gear, 24 ... Sluice gate rack,
25... Guide roller, 26... Guide roller shaft, 27... Brake mechanism, 28... Brake drum, 29... Brake band, 31... Centrifugal brake mechanism, 32... Centrifugal brake casing, 33... Centrifugal brake Hub, 34... Centrifugal brake brake element, 35... Centrifugal brake brake element shaft,
36...Electric motor, 36a...Motor output shaft, 37
...Manual rotation handle.

Claims (1)

[Claims] 1. A worm gear is fixed to a pinion rotor of a differential gear mechanism, and the worm gear is connected to an input shaft to which the worm is fixed via a worm gear mechanism consisting of the worm gear and a worm that constitutes a self-locking gear mechanism. , the input shaft is provided with an input switching connection/disconnection mechanism that allows the input shaft to be freely connected to and disconnected from the output shaft of the mobile rotation device and the manual rotation handle, and the two side gears of the differential gear mechanism are each freely rotatable. fixed to two side gear shafts supported by the
The sprocket gear for raising and lowering the water gate door rack is connected to a fixed output shaft via a reduction gear mechanism, and the other of the side gear shafts is connected to a brake mechanism. A water gate opening/closing machine without a mechanism.