JPH025670B2 - - 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, small hoisting and traction devices have a structure in which the shafts on both sides of the load sheave are each supported by a frame via separate bearings, and a chain guide that faces the chain fitting groove in the load sheave is attached to the frame. are 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 an outward flange 1 at its end, a groove-shaped chain guide 3 protruding outward in the middle upper half of the cylindrical body 2, and a groove-shaped chain guide 3 provided in the middle lower half of the cylindrical body 2. A bearing/chain guide 5 is constituted of a chain passage opening 4 and a locking step 53 provided on the outer surface of the cylindrical body 2 on the opposite side of the outward flange 1. 1 is fitted into the support hole 9 of the second frame 8, and the outer surface of the outward flange 1 is engaged with the locking protrusion 10 connected to the outer peripheral edge of the support hole 9, and the cylindrical body 2 The end opposite to the outward flange 1 is fitted into the support hole 7 of the first frame 6, and the stepped portion 53 of the cylindrical body 2 is fitted into the support hole 7 of the first frame 6.
The shaft portions on both sides of the load sheave 14 are arranged to engage with the inner edge of the load sheave 14 and rotated via the drive shaft 13 by manual operation, and are rotatably fitted into the cylindrical body 2. This is a small hoisting and towing device.

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

4 to 6 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 15 at one end and an outward flange 1 at the other end, a groove-shaped chain guide 3 protruding outward at an intermediate upper half of the cylindrical body 2, 2, a notch 16 located at the bottom of the outward flange 1, and an engagement provided on the outer surface of the cylindrical body 2 on the side opposite to the outward flange 1. A stop portion 53 is formed.

1 and 2 show a small hoisting and traction device using the bearing and chain guide 5, and the third
The figure shows the bearing/chain guide 5, the first frame 6, and the second frame 8 separately, and the first frame 6 made of a steel plate is provided with a circular support hole 7 and a circular through hole 17. A circular support hole 9 and an annular locking protrusion 10 connected to the outer peripheral edge of the support hole 9 are formed by press working on the second frame 8 made of a steel plate, and the second frame 8 is made of a steel plate. The second frames 8 are arranged in parallel at intervals, and the outward flanges 1 of the bearing/chain guide 5 are fitted into the support holes 9 of the second frames 8, and the outward flanges 1
The outer surface of the cylindrical body 2 is engaged with the locking projection 10, the end of the cylindrical body 2 on the cover plate side of the bearing/chain guide 5 is fitted into the support hole 7 of the first frame 6, and the outer surface of the cylindrical body 2 is engaged with the locking protrusion 10. The locking step portion 53 is connected to the first frame 6
It is arranged so as to engage with the inner edge of the bearing hole 7 at. Further, a drive shaft 13 is unrotatably fitted into the center of a rotating body 19 having a load sheave 14 and a brake receiver 18 in the middle, and a split ring is fitted and locked to one end of the drive shaft 13. 2
0 is engaged with one end of the rotating body 19, and shaft portions on both sides of the load sheave 14 in the rotating body 19 are rotatably fitted into the cylindrical body 2 of the bearing/chain guide 5.

A drive member 2 including a switching gear 22 on a brake screw 21 provided on the other end side of the drive shaft 13.
3 is screwed together, and the other end of the drive shaft 13 is provided with a male thread 24 having a diameter smaller than that of the brake screw 21 and inclined in the opposite direction. screw 21
and is fixed to the male screw 24 by a locking pin 26, and further between the other end of the rotary body 19 and the drive member 23, which resists movement of the drive member 23 in the brake tightening direction. A resistance spring 27 consisting of a helical spring is interposed in a compressed state.

The chain stripper 28 in the spacer/chain stripper 11 is the bearing/chain guide 5
The spacer/chain stripper 11 is inserted into the lower part of the groove of the load sheave 14 through the chain passage opening 4 in the first frame 6 .
the inner surface of the frame 8 and the outward flange 1
A locking shaft 29 provided at one end of the spacer/chain stripper 11 is inserted into the through hole 17 of the first frame 6, and is inserted between the spacer/chain stripper 11 and the inner surface of the lower part of the spacer/chain stripper 11. A locking protrusion 30 provided at the other end of the pad 11 is fitted into a notch 16 in the outward flange 1.

The coupling bolt 12 is inserted across the flanges of the first frame 6, the spacer/chain stripper 11, the second frame 8, and the steel plate brake cover 31, and has a rotation stopper provided at the base end of the coupling bolt 12. The square shaft portion 32 is fitted into a square hole of the first frame 6, and a nut 33 is screwed onto the tip of the coupling bolt 12.

On the outer periphery of the other end of the rotating body 19, between the brake receiver 18 and the drive member 23, a ratchet wheel 34, a bearing ring 35 located inside the ratchet wheel 34, and a friction plate 36 arranged on both sides thereof. installed,
Large outer diameter section 37, medium outer diameter section 38, and small outer diameter section 39
The intermediate outer diameter portion 38 of the stepped sleeve 40 formed in this order is inserted into the through hole of the second frame 8, and the large outer diameter portion 37 is interposed between the first frame 6 and the second frame 8. A pawl piece 41 that engages with the ratchet wheel 34 is rotatably fitted into the small outer diameter portion 39 , and an engagement spring 42 that works to engage the pawl piece 41 with the ratchet wheel 34 is fitted onto the middle outer diameter portion 38 . They are fitted and locked to the second frame 8 and the claw pieces 41.

The coupling bolt 43 is inserted through the through holes of the first frame 6, the stepped sleeve 40, and the brake cover 31, and the anti-rotation square shaft portion 32 provided at the base end of the coupling bolt 43 is inserted into the first frame 6, the stepped sleeve 40, and the brake cover 31. 6, and a nut 44 is screwed onto the tip of the coupling bolt 43, and the brake cover 31 is tightened and fixed to the end surface of the stepped sleeve 40 and the second frame 8 by the nut 44. The first frame 6 and the second frame 8 are integrally coupled via a coupling bolt 43 and a stepped sleeve 40.

The base end of the manual operation lever 45 is connected to the drive member 23
One side of the lever 45 is rotatably fitted into a circular opening provided in the brake cover 31, and a support shaft rotatably attached to the lever 45 is rotatably fitted into the lever 45. A switching claw fitting 47 having a forward rotation claw piece and a reverse rotation claw piece and a handle 48 are fixed to the lever 46, and a holding piece 5 that is pressed against the switching claw fitting 47 by a spring 49 is further fixed to the lever 45.
0 is slidably attached. Further, an upper hook support fitting 52 to which an upper hook 51 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 8.

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.

If the cover plate 15 is connected to the end of the cylindrical body 2 opposite to the outward flange 1 as in the embodiment described above, it is possible to prevent dust from entering the bearing part of the load sheave 14. Can be done.

〔Effect of the invention〕

According to the present invention, a bearing includes a cylindrical body 2 that rotatably supports the shaft portions on both sides of the load sheave 14, that is, a bearing cylinder, a chain guide 3, and an outward flange 1 at the end of the cylindrical body 2. The double chain guide 5 can be manufactured easily and at low cost by simply pressing a single metal plate, and the cylindrical body 2 supporting the shaft portions on both sides of the load sheave 14 and the chain guide 3 can be manufactured easily and at low cost. Since these are integrally constructed, it is possible to assemble the small hoisting and traction device easily and quickly. 10 and the inner edge of the support hole 7 in the first frame 6 that engages with the locking step 53 of the cylindrical body 2 to prevent the bearing/chain guide 5 from moving in the axial direction of the load sheave 14. Effects such as being able to firmly hold the material are obtained.

[Brief explanation of drawings]

Fig. 1 is a longitudinal side view of a small hoisting and traction device according to an embodiment of the present invention, Fig. 2 is a longitudinal side view showing an enlarged part of Fig. 1, and Fig. 3 is a bearing and chain guide. FIG. 3 is a longitudinal side view showing the first frame and the second frame separately. FIG. 4 is a front view of a bearing/chain guide used in an embodiment of the present invention, FIG. 5 is a rear view thereof, and FIG. 6 is a longitudinal sectional side view of the bearing/chain guide. In the figure, 1 is an outward flange, 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 support hole, and 8 is a second frame , 9 is a support hole, 10 is a locking protrusion, 11 is a spacer/chain stripper, 12 is a coupling bolt, 13 is a drive shaft, 14 is a load sheave, 15 is a cover plate, 16 is a notch, 17 is a Through hole, 18 is a brake receiver, 19 is a rotating body, 20 is a split ring, 21 is a brake screw, 22 is a switching gear, 23 is a driving member, 25 is a stopper nut, 27 is a resistance spring, 28 is a chain stop Ripper, 29 is a locking shaft, 30 is a locking protrusion,
31 is a steel plate brake cover, 32 is a square shaft for preventing rotation, 33 is a nut, 34 is a ratchet wheel, 36 is a friction plate, 40 is a stepped sleeve, 41 is a claw piece, 43 is a coupling bolt, 44 is a nut , 45 is a lever for manual operation, 47 is a switching claw metal fitting, and 53 is a locking step.

Claims (1)

[Claims] 1. A cylindrical body 2 formed by pressing a single metal plate and having an outward flange 1 at the end thereof, and a groove-shaped chain guide 3 protruding outward in the middle upper half of the cylindrical body 2. The chain passage opening 4 provided in the middle lower half of the cylindrical body 2 and the cylindrical body 2
A bearing/chain guide 5 consisting of an outward flange 1 on the outer surface of the bearing and a locking step 53 provided on the opposite side.
The outward flange 1 of the cylindrical body 2 is fitted into the support hole 9 of the second frame 8, and the outer surface of the outward flange 1 is connected to the outer peripheral edge of the support hole 9. The end portion of the cylindrical body 2 opposite to the outward flange 1 is fitted into the support hole 7 of the first frame 6, and the stepped portion 53 of the cylindrical body 2 is engaged with the protrusion 10. arranged to engage the inner edge of the bearing hole 7 in the
A small hoisting and traction device characterized in that shaft portions on both sides of a load sheave 14, which is rotated via a drive shaft 13 by manual operation, are rotatably fitted into the cylindrical body 2.