JPS63821Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a lifting device for an overturning movable weir.

Conventionally, the overturning type movable weir has the lower edge of the weir rotatably supported on the bottom of the drainage ditch in the water storage section, and the weir is erected by a lifting device linked to the weir, thereby blocking the lower part of the drainage ditch. The structure is such that surplus water overflows the upper edge of the weir to maintain the water level in the water storage area at approximately the same height as the upper edge of the weir, and the winding operation is performed by increasing the power by the gear mechanism of the lifting device. The weir is raised and lowered by winding and unraveling the wire rope, which is connected to the wire drum and the upper edge of the weir using a wire rope. Since the drum diameter needs to be larger than the size determined by the wire rope diameter, the device becomes larger, and because the drum diameter becomes larger, it becomes necessary to increase the reduction ratio of the gear mechanism. As the device becomes larger, it becomes difficult to lock the wire rope in the middle of the rope without damaging it, so wire tension is constantly acting on the device's internal mechanism. It was not possible to disassemble and maintain the internal mechanism of the device while it was in storage.

In this design, the movable weir and the lifting device are interlocked and connected by a hoisting chain, and the chain is retracted by the chain foil, and the chain is brought in and out to raise and overturn the weir, thereby allowing the use of a small-diameter chain foil. Moreover, since the diameter of the same wheel is small, the reduction ratio of the gear mechanism can be reduced, making the device more compact, and the chain stopper supports the chain tension on the device frame, making the internal mechanism of the device free from the action of chain tension. It is an object of the present invention to provide an overturning movable weir lifting device that can be released and the internal mechanism of the device can be disassembled and maintained even when water is stored.

To explain the embodiment of this invention in detail based on the drawings, FIG. This figure shows a lifting device D attached to the upper edge of the left bank of the side drain B via the base 1. In order to achieve this, the lower end edge of a front-shaped movable weir C having the same size and shape as the cross-sectional shape of the groove B is rotatably connected to the bottom surface of the groove B, and the hoisting chain 2 is moved by the lifting device D. The upper edge of the weir C is pulled upstream through the weir C, the weir C is erected and the lower part of the drainage ditch B is closed, and the chain 2 is unraveled and the weir C is lowered downstream to open the drainage ditch. It is configured to release B. C' in Fig. 1 is a rubber gasket for preventing water leakage from the bottom and left and right edges of the weir C.

The lifting device D includes a hoisting part 4 disposed on the machine frame 3,
It is composed of a ratchet section 5, a braking section 6, and a lowering mechanism 7.
One end of the coax 8 protrudes outside the machine frame 3, and a manual crank handle 9 is removably fitted into the protrusion.
The rotation is decelerated and amplified in two stages by the gear mechanism 10 and transmitted to the chain wheel shaft 11.
A chain foil 12 is fitted into the chain, and six chain pockets 13 are formed on the outer peripheral surface of the foil 12.
are sequentially inserted into the device D, and as the wheel 12 rotates forward and backward, the chain 2 is drawn into the device D and drawn out.
is stored in the chain receiver 14 below the chain wheel 12. In the figure, reference numeral 15 denotes a presser roller that comes into contact with the hoisting chain 2 on the left side of the outer circumferential surface of the chain foil 12, that is, on the non-tension side of the hoisting chain 2, to prevent the chain 2 from lifting up, and to prevent the chain foil 12 and the winding. This makes the fitting of the upper chain 2 more reliable.

The ratchet portion 5 includes a ratchet wheel 16 pivotally supported on the machine frame 3 via a pawl axle 16', a pawl 17 for preventing the ratchet wheel 16 from reversing, and a pawl for pivotally supporting the pawl 17. The ratchet wheel 16 is interlocked with the input shaft 8 via a chain interlocking mechanism 19, and the tension of the hoisting chain 2 is determined by the ratchet portion 5.
The movable weir C is supported in a predetermined position. The pawl support plate 18 supports the pawl axle 1
6', and a shock absorber made of a coil spring 20 is interposed between the support plate 18 and the machine frame 3 to reduce the impact when the ratchet wheel 16 and the pawl 17 engage. .

The braking unit 6 is a braking device for reducing the overturning speed when the weir C overturns, and is operatively connected to the pawl axle 16' via a brake chain mechanism 6'.

The lowering mechanism 7 includes a float 2 that moves up and down in accordance with the water level of the water storage part A when the water storage part A reaches an abnormally high water level.
Due to the buoyancy of 1, the ratchet wheel 1 is moved through the link mechanism 22.
6 and the claw 17 to overturn the movable weir C, and when the weir C has overturned to a predetermined position, the stop position setting board 23 interlocked with the chain wheel shaft 11 is actuated to move the movable weir C through the link mechanism 22 Claw wheel 1 again
6 is locked by a claw 17 to stop the movable weir C from falling at a predetermined position.

In the figure, reference numeral 24 denotes a chain stopper, and the stopper 24 has a rectangular outer shape, and is formed with an approximately U-shaped engaging portion 25, which is connected to a chain inlet/outlet 26 bored on the outer surface of the machine frame 3. By inserting the stopper 24 into the chain stopper support 27 provided on the outer surface and engaging and fixing the hoisting chain 2, the tension of the hoisting chain 2 is supported by the support 27 and the inside of the lifting device D is It is configured to relieve the mechanism from the action of hoisting chain 2 tension.

In the figure, 28 is a manual lever for manually engaging and disengaging the claw 17 from the ratchet wheel 16.

The embodiment of this invention is constructed as described above, and the hoisting chain 2 is retracted into the lifting device D by counterclockwise rotation of the manual crank handle 9, and the movable weir C
When the weir C is raised up and stops rotating, the ratchet portion 5 prevents the weir C from reversing, and the weir C is held at a predetermined position. To overturn the weir C, rotate the upper end of the manual lever 28 to the right to detach the pawl 17 from the ratchet wheel 16, and the weir C will be moved downstream by the weight of the movable weir C and the water pressure of the water storage part A. Although the vehicle falls down, it is decelerated by the braking unit 6, so that it falls within a safe predetermined falling speed range. To stop the overturning of the weir C midway, the upper end of the manual lever 28 is rotated to the left to lock the ratchet wheel 16 with the pawl 17. At this time, the shock received by the ratchet wheels 16 and 17 is absorbed by the shock absorber. It is relaxed by the coil spring 20 to prevent damage. When the water level in the water storage section is abnormally high, the buoyancy of the float 21 releases the ratchet section 5 and causes the movable weir C to overturn.When it overturns to a predetermined position, the overturning is stopped by the operation of the stop position setting board 23, and the predetermined position is maintained. . Lifting device D in storage water
When disassembling the internal mechanism, insert the chain stopper 24 into the chain stopper support 27 to easily move the midway part of the hoisting chain 2 to the machine frame 3.
The chain 2 tension is supported by the machine frame 3 by being locked on the outer surface, and the action of the chain 2 tension is removed from the internal mechanism, so disassembly and maintenance can be carried out safely.

According to this invention, the movable weir and the lifting device are interlocked and connected by a hoisting chain, and the chain is drawn in and out with a chain foil, so that a small diameter chain foil can be used and the reduction ratio can be made small. This has the effect that the device can be made smaller and that the lifting device, etc. can be disassembled and maintained safely even in stored water.

[Brief explanation of the drawing]

Figure 1 is a side view of the entire overturning movable weir and lifting device, Figure 2 is a partially cutaway side view of the lifting unit, Figure 3 is a plan view of the chain foil, and Figure 4 is Figure 3-
Cross-sectional view. A...Water storage section, B...Drainage ditch, C...Topable movable weir, D...Lifting device, 2...Hoisting chain, 12
... Chain wheel, 16 ... Claw wheel, 17 ... Claw.

Claims (1)

[Scope of utility model registration request] The overturning movable weir C installed in the drainage ditch B of the water storage part A and the hoisting part 4 provided inside the machine frame 3 of the lifting device D of the weir C are interlocked and connected by a hoisting chain 2, and the hoisting part A chain stopper support 27 is provided at the chain entrance/exit 26 for leading the chain 2 out of the machine frame 3 from 4, and a substantially U-shaped engagement portion 25 is provided between the support 27 and the hoisting chain 2. A chain stopper 24 having a chain stopper 24 is removably interposed, and the chain 2 is moved into the device D using the chain foil 12 of the lifting device D to raise the weir C, and the chain 2 is let out to move the weir C downstream. A lifting device for an overturnable movable weir, which is configured to be able to overturn in any direction, and to be configured such that a hoisting chain 2 can be locked to and released from a machine frame 3.