JPH025669B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a small hoisting and traction device used for hoisting and towing various types of cargo.

[Prior art]

Conventionally, as a small hoisting and traction device, the
As disclosed in No. 59195192, the shaft portions on both sides of the load sheave are each supported by a frame via separate bearings, and the chain guide facing the chain fitting groove in the load sheave is attached to the frame. something is known.

However, in the case of a small hoisting and traction device with this structure, the bearings that support the shafts on both sides of the load sheave and the chain guide are constructed separately, so it is difficult to assemble the small hoisting and traction device. There are problems in that it is time-consuming and requires a large number of parts, resulting in high costs.

[Purpose and structure of the invention]

The purpose of this invention is to provide a small-sized hoisting and traction device that can advantageously solve the above-mentioned problems. A cylindrical body 2 having a cover plate 1 at one end, a groove-shaped chain guide 3 protruding outward at the middle upper half of the cylindrical body 2, and a chain provided at the middle lower half of the cylindrical body 2. A bearing/chain guide 5 is constructed of a passage opening 4, and the bearing/chain guide 5 is constructed across a first frame 6 and a second frame 7 which are arranged in parallel with an interval, and is manually operated. This small-sized hoisting and traction device is characterized in that shaft portions on both sides of a load sheave 9 rotated via a drive shaft 8 are rotatably fitted to the cylindrical body 2.

〔Example〕

Next, the present invention will be explained in detail using illustrated examples.

3 to 5 show a bearing/chain guide 5 used in an embodiment of the present invention, which is formed by pressing a single steel plate.
A cylindrical body 2 having a cover plate 1 at one end and an outward flange 10 at the other end, a groove-shaped chain guide 3 protruding outward at an intermediate upper half of the cylindrical body 2, A chain passage opening 4 provided in the middle lower half of the outer flange 2 and a cutout 11 located at the lower part of the outward flange 10 are formed.

1 and 2 show a small hoisting and traction device according to an embodiment of the present invention using the bearing and chain guide 5, in which a first frame 6 and a second frame 7 made of steel plates are shown. are arranged in parallel at intervals, and the outward flange 10 of the bearing/chain guide 5 is connected to the second frame 7.
The end of the cylindrical body 2 on the cover plate side of the bearing/chain guide 5 is fitted into the through hole of the first frame 6, and the load sheave 9 and the brake receiver are fitted in the intermediate part. Rotating body 1 having a portion 14
A drive shaft 8 is unrotatably fitted into the center of the drive shaft 8, and a split ring 16 that is fitted and locked to one end of the drive shaft 8 is engaged with one end of the rotating body 15. The shaft portions on both sides of the load sheave 9 at 15 are rotatably fitted into the cylindrical body 2 of the bearing/chain guide 5.

a drive member 19 including a switching gear 18 on a brake screw 17 provided on the other end side of the drive shaft 8;
A male screw 20 having a smaller diameter than the brake screw 17 is provided at the other end of the drive shaft 8, and a stopper nut 21 is screwed onto the male screw 20.
is engaged with the end of the brake screw 17 and fixed to the male screw 20 by a locking pin 22, and is further provided between the other end of the rotating body 15 and the drive member 19 to tighten the brake of the drive member 19. A resistance spring 23 consisting of a helical spring resisting directional movement is interposed in a compressed state.

The upper part of the spacer/chain stripper 24 interposed in the lower part between the first frame 6 and the second frame 7 passes through the chain passage opening 4 in the bearing/chain guide 5 to the lower part of the load sheave 9. The locking shaft 25 inserted and provided at one end of the spacer/chain stripper 24 is fitted into the through hole of the first frame 6, and the locking shaft 25 is provided at the other end of the spacer/chain stripper 24. The locking protrusion 26 is fitted into the notch 11 of the outward flange 10 of the bearing/chain guide 5, and the coupling bolt 27 is inserted into the first frame 6,
The anti-rotation square shaft part 29 inserted across the flanges of the spacer/chain stripper 24, the second frame 7 and the steel brake cover 28 and provided at the base end of the coupling bolt 27 is connected to the first frame 6. The connecting bolt 27 is fitted into the square hole of
A nut 30 is screwed into the tip.

On the outer periphery of the other end of the rotating body 15, between the brake receiving part 14 and the drive member 19, a ratchet wheel 31, a bearing ring 32 located inside the ratchet wheel 31, and friction plates 33 arranged on both sides thereof. is fitted,
Large outer diameter section 34, medium outer diameter section 35, and small outer diameter section 36
The middle outer diameter part 35 of the stepped sleeve 37 formed in this order is inserted into the through hole of the second frame 7, and the large outer diameter part 34 is interposed between the first frame 6 and the second frame 7. A pawl piece 38 that engages with the ratchet wheel 31 is rotatably fitted into the small outer diameter portion 36, and an engagement spring 39 that works to engage the pawl piece 38 with the ratchet wheel 31 is fitted onto the middle outer diameter portion 35. They are fitted and locked to the second frame 7 and the claw pieces 38.

The coupling bolt 40 is inserted through the through holes of the first frame 6, the stepped sleeve 37, and the brake cover 28, and the anti-rotation square shaft portion 29 provided at the base end of the coupling bolt 40 is inserted into the first frame 6, the stepped sleeve 37, and the brake cover 28. 6, and a nut 41 is screwed onto the tip of the coupling bolt 40, and the brake cover 28 is tightened and fixed to the end surface of the stepped sleeve 37 and the second frame 7 by the nut 41. The first frame 6 and the second frame 7 are integrally coupled via a coupling bolt 40 and a stepped sleeve 37.

The base end of the manual operation lever 42 is connected to the drive member 19
One side of the lever 42 is rotatably fitted into a circular opening provided in the brake cover 28, and a support shaft rotatably attached to the lever 42 is rotatably fitted into the lever 42. A switching claw fitting 44 having a forward rotation claw piece and a reverse rotation claw piece and a handle 45 are fixed to the lever 43, and a holding piece 4 that is pressed against the switching claw fitting 44 by a spring 46 is further fixed to the lever 42.
7 is slidably attached. Further, an upper hook support fitting 49 to which an upper hook 48 for hanging the small-sized hoisting and traction device is attached is interposed and attached to the upper part between the first frame 6 and the second frame 7.

The above embodiment is an example in which the present invention is applied to a lever-type small-sized hoisting and traction device, but this invention is also applicable to a small-sized hoisting and traction device consisting of a manual chain block that rotates a driving member through a sprocket by a manually operated chain. It can also be implemented in a traction device.

〔Effect of the invention〕

According to this invention, the cylindrical body 2 rotatably supports the shaft portions on both sides of the load sheave 9, that is, the bearing cylinder, the chain guide 3, and the cover plate 1 at one end of the cylindrical body 2.
The bearing-cum-chain guide 5 can be easily and inexpensively manufactured by simply pressing a single metal plate, and also has a cylindrical body that supports the shaft portions on both sides of the load sheave 9. Since the chain guide 2 and the chain guide 3 are integrally constructed, the small hoisting and traction device can be assembled easily and quickly.
Since this is provided, effects such as being able to prevent dust from entering the bearing portion of the load sheave 9 can be obtained.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view of a small hoisting and traction device according to an embodiment of the present invention, and FIG. 2 is an enlarged longitudinal sectional side view of a part of FIG. 1. FIG. 3 is a front view of a bearing/chain guide used in an embodiment of the present invention, FIG. 4 is a rear view thereof, and FIG. 5 is a longitudinal sectional side view of the bearing/chain guide. In the figure, 1 is a cover plate, 2 is a cylindrical body, 3 is a chain guide, 4 is an opening for passing the chain, 5 is a bearing and chain guide, 6 is a first frame, 7 is a second frame, 8 is a drive shaft, 9 is road sheave, 1
0 is an outward flange, 11 is a notch, 14 is a brake receiver, 15 is a rotating body, 16 is a split ring,
17 is a brake screw, 18 is a switching gear, 19 is a driving member, 21 is a stopper nut, 24 is a spacer/chain stripper, 25 is a locking shaft, 26 is a locking projection, 27 is a coupling bolt, 28 is a Brake cover made of steel plate, 29 is a square shaft for preventing rotation, 30 is a nut, 31 is a ratchet wheel, 33 is a friction plate, 37 is a stepped sleeve, 38 is a claw piece, 40 is a coupling bolt,
41 is a nut, 42 is a lever for manual operation, 44 is a switching claw metal fitting, 46 is a spring, and 47 is a holding piece.

Claims (1)

[Claims] 1. A cylindrical body 2 formed by pressing a single metal plate and having a cover plate 1 at one end, a groove-shaped chain guide 3 protruding outward in the middle upper half of the cylindrical body 2, and a cylindrical body 2. A bearing/chain guide 5 is constituted by a chain passing opening 4 provided in the middle lower half of the body 2, and the bearing/chain guide 5 is comprised of a first frame 6 and a first frame 6 arranged parallel to each other at intervals. A compact structure characterized in that shaft portions on both sides of a load sheave 9, which is constructed across the second frame 7 and rotated via a drive shaft 8 by manual operation, are rotatably fitted into the cylindrical body 2. Hoisting and traction device.