JPH035446B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a lifting hook device used, for example, for lifting and lowering gates in dams.

Construction of the conventional example and its problems As a lifting hook device, it is preferable from an operational and economic point of view that the lifting hook device automatically performs the engagement and disengagement operations without using a separate drive device. Previously, for example,
As seen in Publication No. 85020 of 1957, the hook body is swingably attached to the horizontal shaft, and a guide plate is arranged in the open upper part of the locking part formed on the hook body so that it can swing vertically. provided. In this configuration, the elevating body is raised, the guide plate is raised while the hook body is swung backward by the hook pin provided at the upper part, and the hook body is automatically swung forward to engage the hook pin. It is engaged with the stop part to suspend and support the elevating body. Further, by raising the elevating body to a large extent to position the hook pin above the guide plate, and lowering the elevating body after the guide plate has swung downward, the elevating body can be automatically removed. According to such a conventional configuration, the engagement and disengagement operations can be performed automatically without using a separate drive device, and by raising and lowering the hook body relative to the elevating body, automatic engagement and disengagement and lifting after engagement are possible. You will be able to do this. However, with this conventional structure, when pulling up a gate underwater, for example, the hook body and the guide plate may unexpectedly shake due to water resistance or water flow, resulting in a case where the hook cannot be reliably engaged with the hook pin. Furthermore, if the aforementioned rocking movement is not smooth due to rust, etc., engagement and disengagement cannot be performed with sufficient certainty.

OBJECTS OF THE INVENTION An object of the present invention is to provide a lifting hook device that can automatically and always reliably engage and disengage for lifting.

Structure of the Invention In order to achieve the above object, the lifting hook device of the present invention has a connecting rod suspended from the lifting body, and a hanging body attached to the connecting rod so as to be able to move up and down relative to the lifting body within a predetermined range. Attachment: This hanging body is provided with a hook that can be freely engaged and detached from the suspended part provided on the object to be lifted, and this hook is attached to a pair of hooks that are swingably attached to the hanging body with the middle part thereof. a hook opening/closing cam which is rotatably supported by the hanging body between cam acting plates formed at the upper ends of both hooks and has cam acting parts protruding from a plurality of locations spaced at equal angles; and this hook opening/closing cam. It is composed of a passive body that rotates integrally with the hook and has a plurality of passive parts at equiangular positions, and a cam actuating rod that is connected to the connecting rod and whose lower end can freely face the driven part, Opposing claws are formed at the lower end, and a stopper is further provided to limit the lowering of the hanging body.

According to this configuration, by lowering the hanging body together with the lifting body and bringing it into contact with the stopper, the claws of the hook, which have been opened in advance, can be positioned on both sides of the suspended part, and only the lifting body can be further lowered. The cam actuating rod, which is lowered integrally through the connecting rod, pushes down the opposing passive part and rotates the hook opening/closing cam by a predetermined angle together with the passive part, thereby moving the cam acting part to the cam acting plate part. When the hook is separated from the hook, the locking force is released, and the hook can be automatically swung to engage the hook with the suspended portion. Therefore, by subsequently raising the elevating body, the object to be lifted can be lifted via the connecting rod, the hanging body, the hook, and the part to be lifted. To release the lifted object in this manner, the lifting body is lowered together with the lifting body to contact the stopper, and the lifting body is further lowered. Push down the passive parts facing each other to rotate the hook opening/closing cam by a predetermined angle, thereby causing the cam action part to act on both cam action plates, opening both hooks, and detaching the claw part from the suspended part. obtain.

Embodiment and Operation An embodiment of the present invention will be described below with reference to the drawings as an example in which the invention is used to lift a dam gate. In Figures 1 to 4, 1 is the dam body, and an intake channel 2 is formed in the intake tower 38 on the front side of the dam body.
Furthermore, a discharge channel 3 communicating with the lower end of the intake channel 2 is formed. A water control gate 4 is disposed at the entrance of the spillway 3, and this water control gate 4 is connected to a water control gate opening/closing device (winch type, etc.) 6 in an operation room 5 provided at the upper part of the dam body 1. They are interlocked via a wire rope 7. A front wall 8 of a water intake tower 38 is provided at the lower front side of the discharge channel 3, and this front wall 8
A screen 9 is provided above the screen. The surface water intake gate 11 guided by the door stop hardware 10 is
A lifting beam (an example of a hanging body) 12, which is composed of an upper door 11A, a middle door 11B, and a lower door 11C, suspends and supports the upper door 11A, is connected to a surface water intake gate opening/closing device 13 provided in the operation room 5. It is interlocked via a wire rope 14, a pulley 15, and a hanging girder pulley box (an example of an elevating body) 16. A bottom water intake 17 is formed at the lower part of the front wall 8, and a screen 18 is provided in front of the bottom water intake 17. A bottom water intake gate (an example of an object to be lifted) 20 is disposed on the exit side of the bottom water intake port 17 and is guided by a guide hardware 19 and can be raised and lowered. It is set up. This hanging rod 21 is connected to the lower door 1.
The cone-shaped suspended portion 23 provided at the upper end of the hanging rod 21 protrudes upward from the lower door 11C, which can be freely inserted in the vertical direction within the vertical guide body 22 provided on the hanging rod 1C. The length is set. A hook 2 is provided on the lower surface side of the lifting beam 12 and is detachable from the suspended portion 23.
There are 4. This hook 24 is connected to a longitudinal shaft 2 supported by the lifting beam 12.
5, a pair of hooks 26 and 27 which are swingably attached to the shaft 25 at their intermediate portions, and both hooks 26,
Claws 26A, 27A integrally formed at the lower end of 27
, cam action plate portions 26B, 27B integrally formed on the upper ends of both hooks 26, 27, and both cam action plate portions 2.
A rotary shaft 28 disposed parallel to the shaft 25 and supported by the lifting beam 12 between 6B and 27B, a hook opening/closing cam 29 attached to the rotary shaft 28, and a round cam 29 attached to the rotary shaft 28. It consists of a saw-shaped passive body 30. The hook opening/closing cam 29 has two cam acting portions 29a, which are displaced by 180 degrees.
29b, and the passive body 30 has passive parts 30a, 30b, 30c, and 30d at four locations at 90-degree intervals. A connecting rod 31 hanging vertically from the suspension girder pulley box 16 is connected to the lifting beam 12 within a predetermined range via a connecting body 32 that is attached to the intermediate portion of the connecting rod 31 and located within the lifting beam 12. are connected so that they can be moved up and down relative to each other,
Further, a cam actuating rod 33 extending obliquely downward is connected to the lower end of the connecting rod 31, and a roller 39 is attached to the lower end of this cam actuating rod 33. Note that both hooks 26 and 27 have claw portions 26A and 2
It is automatically biased to close by the large weight of 7A. A stopper 34 that can receive the lifting beam 12 is erected from the upper end of the lower door 11C.

The operation of the above embodiment will be explained below. 1 and 5A, by operating the surface water intake gate opening/closing device 13 and raising and lowering the surface water intake gate 11 via the wire rope 14, suspension girder pulley box 16, lifting beam 12, etc. Dam water in the surface intake area 35 can be taken into the intake channel 2 through the screen 9, and can be discharged downstream through the spillway 3 by raising the bottom water intake gate 20. In addition, water intake from the bottom water intake area 36 is first carried out through the door 1 of each stage as shown in FIG. 5D.
1A, 11B, and 11C are lowered to their lower limits. As a result, the upper end suspended portion 23 of the hanging rod 21
protrudes above the upper surface of the lower door 11C. At this time, as shown in FIG.
b is located on the horizontal line, and the cam action plate portion 26
Since the hooks 26, 27 swing around the shaft 25 via the hooks 26A, 27B, both claws 26A, 2
7A open and move apart from each other, and both claw portions 26
A and 27A are located below the suspended portion 23. Also, the lifting beam 12 has a stopper 34.
This has prevented further decline. If the hanging girder pulley box 16 is further lowered in this state, the connecting rod 31 will be lowered with respect to the lifting beam 12, thereby engaging one passive part, for example, the passive part 30a in FIG. The matching rollers 39 are lowered together, and the passive body 30 is rotated by a certain angle θ, in this case 90 degrees. Accordingly, the hook opening/closing cam 29 integrated with the passive body 30 rotates 90 degrees via the rotating shaft 28, and the cam action parts 29a and 29b move from the horizontal position shown by the solid line to the vertical line position shown by the imaginary line. Displaced to. As a result, the hooks 26 and 27 are released from the restraining force applied to the cam action plates 26B and 27B, and the hooks 26 and 27 automatically move the hooks 26 and 27 due to their own weight.
A and 27A move toward each other and engage with the suspended portion 23 as shown in FIG. 5C and FIG. 6B. Next, hanging girder pulley box 16
When the lifting beam 1 is raised, first, only the hanging girder pulley box 16 is raised to the upper limit position by the connecting body 32, and then the lifting beam 1 is raised integrally as shown in FIG. 6C. At this time, since the hook 24 is engaged with the suspended portion 23, the lower door 11
With C in the middle, raise the bottom water intake gate 20 and open the bottom water intake range 3 as shown in FIG.
The dam water of No. 6 can be taken into the intake channel 2 through the screen 18. When the dam water level exceeds the upper limit (LWL) of the bottom water intake range 36, the bottom water intake gate 2
0 and the surface water intake gate 11 is activated. That is, first, the lifting beam 12 is lowered, and the bottom water intake gate 20 is placed on the floor as shown in FIG. 5E. At the time of landing on the floor, it is in a clamped state as shown in FIG. 6D. Then, when the hanging girder pulley box 16 is further lowered, the lifting beam 12 is moved to the stopper 34.
After being received by the lifting beam 12
The connecting rod 31 is lowered, and the roller 39 pushes down the next driven part 30b, and the hook opening/closing cam 29 is rotated so that the cam acting parts 29a and 29b are on the horizontal line. As a result, both hooks 26 and 27 are rotated as shown in FIG. 6E, and the engagement with the suspended portion 23 is released. Next, by raising the suspension girder pulley box 16, the lifting beam 12 is moved to the suspension rod 21, that is, the bottom water intake gate 20, as shown in FIG.
It continues to rise with . By further raising the surface water intake gate 11, the surface water intake gate 11 can be operated as shown in FIG. Inspection of both gates 11 and 20 can be carried out above the uppermost dam water level (NWL) as shown in Figure 5 G by lifting the bottom water intake gate 20 upward in an operable state as shown in Figure 5 C. .

In addition, there is a guide hardware 19 at the bottom of the lower door 11C.
A water shielding plate 37 is attached to prevent water from leaking through.

For example, as shown in FIG.
When the hook 24 descends while the hook 7 is in the closed position, the lower end inclined surface 2 of both claws 26A, 27A
The cam action between the hooks 6a, 27a and the arcuate outer surface 23a of the suspended portion 23 allows the hooks 26, 27 to be opened automatically. Further, in FIG. 4, when the hanging rod 21 is fixed to the lower door 11C, the lower door 11C can be used as an object to be lifted, such as a bottom water intake gate.

Effects of the Invention According to the lifting hook device of the present invention having the above-mentioned configuration, by lowering the hanging body together with the lifting body and bringing it into contact with the stopper, the claws of the hook, which are opened in advance, are positioned on both sides of the suspended part. Then, by further lowering only the elevating body, the cam actuating rod, which is lowered integrally via the connecting rod, pushes down the opposing passive part,
The hook opening/closing cam is rotated by a predetermined angle together with the passive body, thereby separating the cam action part from the cam action plate part, and the hook whose binding force is released engages its claw part with the suspended part. It can be automatically swung as much as possible. Therefore, by raising the elevating body after this, the connecting rod,
The object to be lifted can be lifted via the hanging body, the hook, and the part to be lifted. To release the lifted object in this manner, the lifting body is lowered together with the lifting body to contact the stopper, and the lifting body is further lowered. Push down the opposing passive part and rotate the hook opening/closing cam by a predetermined angle.
This allows the cam action section to act on both cam action plate sections to open both hooks and detach the claw section from the suspended section. As described above, according to the present invention, the engagement and disengagement for lifting,
This can be carried out automatically and always reliably, and can be particularly advantageously employed for lifting gates.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a longitudinal cross-sectional view, Fig. 2 is a cross-sectional view, Fig. 3 is an explanatory diagram of the operation of the main part, Fig. 4 is a perspective view of the hanging part, and Fig. 5 is a longitudinal sectional view. Figures I to I are explanatory diagrams of the function of the gate, Figs. 1...Dam body, 11...Surface water intake gate, 1
1C...Lower door, 12...Lifting beam (hanging body), 13...Surface water intake gate opening/closing device, 1
4... Wire rope, 16... Hanging girder pulley box (elevating body), 17... Bottom water intake, 20... Bottom water intake gate (lifted object), 21... Hanging rod,
23...Hanged part, 24...Hook tool, 26,2
7...Hook, 26A, 27A...Claw part, 26
B, 27B...Cam action plate part, 29...Hook opening/closing cam, 29a, 29b...Cam action part, 30
...Passive body, 30a, 30b, 30c, 30d...
...Passive part, 31...Connection rod, 32...Connection body, 33...Cam actuation rod, 34...Stopper, 39...Roller.

Claims (1)

[Claims] 1. A connecting rod is hung from the lifting body, a hanging body is attached to the connecting rod so that it can be raised and lowered relative to the lifting body within a predetermined range, and a suspended part provided on the lifted object is attached to the hanging body. A removable hook is provided between the pair of hooks, which are swingably attached to the hanging body with an intermediate portion thereof, and a cam action plate formed at the upper end of both hooks. A hook opening/closing cam that is rotatably supported by the body and has protruding cam acting parts at multiple locations spaced at equal angles, and a passive drive unit that rotates integrally with the hook opening/closing cam and has passive parts at multiple locations spaced at equal angles. and a cam actuating rod that is connected to the connecting rod and whose lower end can freely face the driven part, and has claw parts that face each other at the lower ends of both hooks, and further includes a lower end of the hanging body. A lifting hook device characterized by being provided with a stopper.