JPH045088B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a device for automatically locking and automatically releasing an interlocking shaft interlocking with a rotating shaft of a hoisting machine for a lodging weir.

BACKGROUND TECHNOLOGY Conventionally, a ratchet wheel interlocked with the rotating shaft of a hoisting machine of a lodging weir is engaged with a stop pawl that prevents the ratchet wheel from rotating in one direction, and the stop pawl is interlocked with the vertical movement of a float. The device is automatically released by directly disengaging the device.

Problems to be Solved by the Invention However, since a large frictional force is applied to the stop pawl engaged with the ratchet wheel, the stop pawl cannot be smoothly removed, and the shape of the float tends to be large. It was hot.

In order to solve these problems, a mechanism was developed in which the rotating shaft of the hoist is locked by the engagement of the ratchet wheel and the rotating cam, and the lock is released by the upward release of the rotating cam. This device is characterized in that automatic locking and automatic release are facilitated without applying a large frictional force to the sliding contact between the ratchet wheel and the rotary cam.

Means for Solving the Problems The configuration of the present invention will be described below with reference to embodiment figures.

A hoisting shaft 3 and a handle shaft 4 are supported left and right in a box 2 of a hoisting machine 1 of a lodging weir, and are interlocked by an interlocking mechanism 5 such as a chain wheel or an endless chain. The interlocking shaft 6 is supported by the hoisting shaft 3 and the interlocking shaft 6.
The gears 7 and 7' which are fixed at a position close to the front end of the handle shaft 4 are interlocked with each other, and the ratchet wheel 8 is fixed to the interlocking shaft 6 at the rear position of the gear 7.
An arm plate 9 is provided protruding from the inner surface of the box 2 at an upper position to pivotally support a pivot 10, the lower end of a U-shaped rod 11 is pivotally attached to the pivot 10, and a circular arc that contacts and slides on the inner circumferential surface of the ratchet wheel 8. A square cam wheel 13 having an arbitrary number of surfaces 12 on its outer circumferential surface is U.
A cam wheel 13 is mounted loosely on the pin 14 at the tip of the mold rod 11.
The protrusions are engaged with the claws of the ratchet wheel 8, and the arcuate surface 12 is brought into contact with the outer peripheral surface of the ratchet wheel 8, and one tip of the U-shaped rod 11 is provided to protrude, and the shaft piece 15 is projected on the outer surface. A guide roller 16 is loosely suspended on the shaft piece 15, and a pressure rod 18 of a reverse shape is provided protruding from a boss 17 loosely fitted to the interlocking shaft 6 at a rear position of the ratchet wheel 8, facing the U-shaped rod 11. The guide roller 16 is fitted into a guide groove 19 bored on the opposing surface of the pressing rod 18, and an arm rod 20 is similarly provided protruding from the boss 17 facing the pressing rod 18.
The upper end of a connecting rod 21 having a float connected to its lower end is connected to the upper end of the rod 21, and a winding drum 22 is secured to the rear of the winding shaft 3, and a centrifugal brake mechanism 23 is attached thereto. In addition, 24 in the figure is a handle, 2
Reference numeral 5 indicates a manual operating lever for releasing the lock, and reference numeral 26 indicates a V-shaped lever that rotates the arm lever 20 upward in conjunction with the manual operating lever.

Functions and Effects When the handle 24 is fitted onto the front protrusion of the handle shaft 4 of the hoist 1 and rotated in a clockwise manner when viewed from the front, the hoist shaft 3 is rotated in the same direction by the interlocking mechanism 5 and the winding drum is rotated. The wire of the lodging weir is wound around the weir 22 and erected. During this winding operation, the interlocking shaft 6 above the winding shaft 3 rotates counterclockwise in front view due to the engagement of the gears 7 and 7', and the square cam wheel 13 comes into contact with the outer peripheral surface of the ratchet wheel 8. When the handle shaft 4 slides and stops rotating, the interlocking shaft 6 rotates in the opposite direction due to the load of the lodging weir applied to the hoisting shaft 3, and the pawl of the ratchet wheel 8 of the interlocking shaft 6 has a square shape. The protrusion of the cam wheel 13 is engaged to prevent reverse rotation of the ratchet wheel 8 and maintain the upright state of the lodging weir. The square cam wheel 13 rotates due to engagement with the pawl of the ratchet wheel 8, and the U-shaped rod 11 tries to lift upward, but the guide roller 16 provided on the protruding portion at one end of the U-shaped rod 11 It fits into the base of the guide groove 19 of the reverse-shaped pressing rod 18, and prevents the boss 17 from rotating through the arm rod 20 even under the load pressure of the float, thereby preventing the U-shaped rod 11 from lifting up. be. When the water level of the waterway rises above the collapse water level, the connecting rod 21 is pushed up by the buoyancy of the float, the boss 17 rotates counterclockwise via the arm rod 20, and the pressing rod 18 also rotates upward. By doing so, the locking force of the guide roller 16 by the guide groove 19 of the pressing rod 18 is released, and the square cam wheel 13 that has engaged with the ratchet wheel 8 is separated from the ratchet wheel together with the U-shaped rod 11 while rotating. The locking force of the ratchet wheel 8 is released, and the hoisting shaft 3 rotates in the opposite direction, automatically lowering the standing weir to the river bed. Since the lodging weir is automatically locked by the engagement of the pawl of the ratchet wheel 8 and the square cam wheel 13 of the U-shaped rod 11, no large frictional force is applied when releasing, and when the hoisting operation is performed, the lodging weir is automatically locked. The ratchet wheel and the rectangular cam wheel can engage with each other at any position to achieve automatic locking, and the above-mentioned remarkable effects can be achieved.

[Brief explanation of drawings]

FIG. 1 is a plan view of the main parts of a hoisting machine showing an automatic locking and automatic releasing mechanism according to an embodiment of the present invention, and FIG.
The figure is the A-A line arrow view, and the third figure is also B-B.
Figure 4 is a view taken along the line C-C, and Figure 5 is a view taken along the line C-C.
The figure is an enlarged front view showing the engagement of the ratchet wheel and the square cam wheel, FIG. 6 is a view taken along line D-D, FIG. The figure is E-
9 is a plan view of the hoisting machine, and FIG. 10 is a left side view thereof. 1...Hoisting machine, 2...Box, 3...Hoisting shaft, 4...Handle shaft, 6...Interlocking shaft, 8...Rawl wheel, 11...U-shaped rod, 13...Square cam car, 16
... Guide roller, 18 ... Pressing rod, 19 ... Guide groove, 20 ... Arm rod, 21 ... Connection rod.

Claims (1)

[Claims] 1. A hoisting shaft and a handle shaft are supported in the box of the hoisting machine of the lodging weir and are interlocked with each other, and an interlocking shaft is supported above the hoisting shaft and interlocked with the hoisting shaft. A ratchet wheel is fixed to the interlocking shaft, a pivot is provided on the inner surface of the box facing the ratchet wheel, the lower end of the U-shaped rod is pivoted, and a circular arc surface that slides against the inner peripheral surface of the ratchet wheel is arbitrarily attached to the outer peripheral surface. A number of square cam wheels are suspended loosely on the tip pin of the U-shaped rod, the protrusion of the square cam wheel is engaged with the pawl of the ratchet wheel, and the circular arc surface is brought into contact with the outer peripheral surface of the ratchet wheel, One tip of a U-shaped rod is protruded, a guide roller is suspended loosely on the outer surface, and a pressure rod of an opposite shape is installed opposite to the U-shaped rod to protrude from the boss loosely fitted to the hoisting shaft at the rear of the ratchet wheel. Then fit the guide roller into the guide groove bored on the opposite surface of the pressing rod.
Similarly, the arm rod is protruded from the boss, facing the pressing rod,
An automatic locking and automatic releasing device for a hoisting machine for a lodging weir, characterized in that the upper end of a connecting rod whose lower end is connected to a float is connected to the arm rod.