JPS6239027Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a manual hoist that is used as a load tightener to secure the loaded material to the vehicle body, especially when the loaded material such as steel material is transported by truck etc. This invention relates to an improvement in the lever structure of a manual hoist.

Conventionally, in a manual hoisting machine, as shown in FIG. 1, a ratchet lever 3 has a check pawl 3a at its upper end that engages with a ratchet 2 of a hoisting machine main body 1;
The rod lever 4 that supports the ratchet lever 3 in a vertically movable manner is attached to the hoist main body 1 by a handwheel 6 that is attached to the ratchet 2 by a bolt 5, so it is necessary to remove the ratchet lever 3 and the rod lever 4. I couldn't do that. Therefore, one set of levers is required for each hoisting machine, and in order to use the hoisting machine to secure loads such as steel materials to the vehicle body, multiple hoisting machines must be used. As a result, there is a risk that the levers attached to each of them may protrude in the direction of their own hands and damage the levers by colliding with other obstacles.Also, since the levers are left attached,
There was a fear that the cargo could be stolen. 7 is a brake cover, 8 is a ratchet stopper, 9 is a support shaft, and 10 is a quick return spring.

Therefore, the present invention was made in view of the above-mentioned conventional problems, and provides a lever structure for a manual hoist that has a simple structure and can be easily attached and detached, thereby solving the above-mentioned problems. The purpose is to

The present invention will be described below with reference to illustrative embodiments.

A is a manual hoisting machine, and is composed of a hoisting machine main body a, a manual operation part b, and a link chain c.

The hoisting machine a has a pinion guide 11, a load sheave 12, a ratchet 13, and a ratchet stopper 1.
4, spindle 15, handwheel 16, gear cover 1
7. Brake cover 18 and top hook 19
A link chain c having a bottom hook 20 at one end and a chain stopper 21 at the other end is hung on the load sheave 12. The diameter of the handwheel 16 is made to be approximately the same as the diameter of the ratchet 13, a notched groove 22 is formed approximately in the center of its circumferential surface, and the handwheel 16 is fixed to the ratchet 13 with a bolt 23. Reference numeral 24 denotes a quick return spring interposed in the hollow portion of the handwheel 16.

The manual operation unit b consists of a rod lever 26 and a ratchet lever 27. A ring-shaped fitting portion 28 having an inner diameter slightly larger than that of the ratchet 13 is formed integrally with the upper end of the rod lever 26, and is loosely fitted between the ratchet 13 and the hand wheel 16 via a pawl washer 29 so as to be freely rotatable. The ratchet lever 27 has a check pawl 27a at its upper end which engages with and disengages from the recess 13a formed in the ratchet 13, and is attached to the inside of the rod lever 26 so as to be movable up and down. It is always urged upward by a spring 31 interposed between a spring pin 30 inserted in the middle of the ratchet lever 27 and the step 26a of the rod lever 26, and the check pawl 27a engages with the recess 13a of the ratchet 13 facing in either the left or right direction, and the direction of the check pawl 27a determines whether the link chain c is raised or lowered.
An operating handle 32 is attached to the lower end of the rod lever 26, and a step 32b is formed at the mounting portion which is parallel to the horizontally extending grip portion 32a of the operating handle 32. When the ratchet lever 27 is in the neutral position, that is, when the operating handle 32 is operated to pull down the ratchet lever 27 and release the engagement between the check pawl 27a and the recess 13a of the ratchet 13, if the operating handle 32 is rotated perpendicular to the rod lever 26, the step 32b will engage with the engagement portion 26c formed in the recess 26b of the rod lever 26, thereby maintaining the neutral state.

33 is a release lever, which is approximately L-shaped.
The horizontal portion 33a at the lower end is loosely fitted between the spring pin 30 and the spring 31 of the ratchet lever 27.
The lever 33 is supported by a spring pin 30 and a spring 31, and is rotatably held in that position. A long hole 33c is formed in the center of the vertical portion 33b of the lever 33, and the lever 33 is slidably attached to the outside of the rod lever 26 by a mounting pin 34.
3d is a check claw 27 of the ratchet lever 27
When the manual operating portion b engages with the recess 13a of the ratchet 13, it engages with the notched groove 22 of the hand wheel 16, so that the manual operating portion b is prevented from coming off the hoist main body a.

To remove the manual operation part b from the hoist main body a, operate the operation handle 32 and pull down the ratchet lever 27 to the neutral state, and the detachment lever 33 will also lower accordingly and the upper end 33d will be attached to the notch of the handwheel 16. Since it comes off from the groove 22, it can be easily removed.

As described above, according to the present invention, the manual operation section of a manual hoist can be easily attached and detached by a single operation of the operating handle, so that one manual operation section can be used to connect several hoist bodies. It is not only economical and easy to carry, but also allows manual operation during transportation, especially when the hoist is used as a load tightener for a load such as a truck. Since the operating section can be removed, the lever of the manual operating section will not be damaged, and it also has the effect of preventing theft of the loaded items.

[Brief explanation of the drawing]

Fig. 1 is an enlarged side view of a partially broken main part of a manual hoist showing a conventional lever structure, Fig. 2 is a side view of a manual hoist according to the present invention, and Fig. 3 is a main part of the same. FIG. 4 is a partial sectional view corresponding to the - line in FIG. 3, FIG. 5 is a partial sectional view corresponding to the - line in FIG. 3 showing the neutral state of the ratchet lever, and FIG. FIG. 7 is an enlarged rear view of the main part of the manual operation section corresponding to the line - in FIG. 4, showing the neutral state of the ratchet lever. A is a manual hoist, a is the hoist main body, b is a manual operation part, c is a link chain, 13 is a ratchet, 16 is a handwheel, 22 is a notch groove, 26 is a rod lever, 27 is a ratchet lever, 32 is a Operation handle, 33 is detachable lever.

Claims (1)

[Scope of utility model registration request] When transporting loads such as steel materials by truck, etc.
In a manual hoisting machine for fixing the loaded object to the vehicle body, the diameter of the handwheel of the hoisting machine is made approximately the same as the diameter of the ratchet, and a notched groove is formed on the circumferential surface of the handwheel. At the same time, a roughly L-shaped attachment/detachment lever with a long hole in the vertical part is attached to the top of the rod lever so as to be slidable in the vertical direction, and the horizontal part of the lower end is inserted into the inside of the rod lever through the long hole in the rod lever. The rod lever is positioned such that it is rotatably locked to a ratchet lever having a non-return claw at its upper end that engages with the ratchet, and is always urged upward by a spring interposed between the ratchet lever and the rod lever. so that the upper end of the vertical part of the attachment/detachment lever is engaged with the cutout groove of the handwheel, and when the operation handle of the ratchet lever is operated to pull the ratchet lever to a neutral state, the attachment/detachment lever is A lever structure for a manual hoist, characterized in that the upper end of the lever is detached from the handwheel and the rod lever can be removed.