JPS5943399B2 - Lifting or towing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a new structure for a hoisting or hoisting machine such as a chenobloc or winch, or a hoisting or traction device such as a lever block, which allows a large reduction ratio to be obtained with a simple structure. In addition, it is not only possible to raise and lower cargo reliably and easily, but also to maintain the cargo in a lifted state without requiring any operations, and it is possible to forcibly tow other objects. An output-side rotary body is rotatably attached to the main body, and the output-side rotary body is rotatably attached to the main body, and the output-side rotary body is rotatably attached to the main body, and a large number of concave and convex portions are formed at equal intervals along the circumference. A cylindrical holding member is rotatably provided on the outer periphery of the output side rotary body, and this holding member has rollers in a number close to the number of concavo-convex portions of the output side rotary body that are moved approximately in the radial direction. The holding member is provided with a reverse rotation prevention device to prevent rotation in a direction opposite to the pulling direction, and an input portion is rotatably arranged on the outer periphery of the holding member and the roller. However, in the case where the inner circumferential wall of this input section is approximately eccentric so as to contact or come very close to the rollers, the rollers are arranged in two or more rows around the circumference of the output rotating body, and the inner circumferential wall of the input section The inner circumferential wall of the is symmetrical with respect to the center of its radius of curvature through the center of rotation of the output rotating body. This invention relates to a lifting or towing device characterized in that it is placed at a certain position.

Next, referring to the drawings, an embodiment of the present invention will be explained in the case of a cheno block. Although not shown in the drawings, an output part 1 having a cheno hanging part 2 for forcibly pulling up a load is mounted on a main body 3 and is rotated by a bearing 4 or the like. One end of the output section 1 is made to protrude outward from the main body 3, and a disc-shaped output rotating body 5 is fixed thereto.

For example, 18 semicircular recesses 6 are provided at equal intervals on the outer periphery of the output side rotating body 5, and rollers 9, which will be described later, are provided in the semicircular recesses 6.
, 10 is rotatably fitted into the cylinder body 1, and a part of the cylinder body 7 is attached to the output side rotating body 5.
1 on the outer circumference of the output side rotating body 5 by protruding to the 0 circumference surface.
Eight uneven portions are formed.

A cylindrical holding member 8 is rotatably provided on the outer periphery of the output side rotary body 5 having an uneven portion on the outer periphery, and this holding member 8 has more than 18 uneven portions, which is the number of the uneven portions of the output side rotary body 5. When 17 rollers 9 and 10, one less than each row, are arranged in two rows on the outer periphery of the rotating body, the rollers 9 and 10 are guided by the irregularities on the outer periphery of the output side rotating body 5, and are oriented almost in the radial direction. Holding parts 11 and 12 in the form of through holes for movable holding are provided, and the rollers 9 and 10 are accommodated in the holding parts 11 and 12.

A ratchet tooth ring 13, which forms part of a reverse rotation prevention device, is attached to the main body 3 side of the holding member 8.

This ratchet tooth ring 13 may be fixedly connected to the holding member 8, but the ratchet tooth ring 13 is attached so as to be able to rotate to some extent with respect to the holding member 8, and the ratchet tooth ring 13 is attached so as to be able to rotate to some extent with respect to the holding member 8. If the deceleration effect described below occurs even if there is, the both side walls of the input part 15 rotatably disposed around the outer periphery of the rollers 9 and 10 between the ratchet tooth ring 13 and the collar 14 of the holding member 8 should be clamped. The ratchet tooth ring 13 is designed so that it can thread during rotation.

For this purpose, an inclined groove 16 is provided in the holding member 8, and a locking body 17 such as a ball accommodated in this inclined groove 16 is always pressed in one direction by an elastic body 18 such as a spring.
When the locking body 17 is engaged with the ratchet tooth ring 13 and no force is applied, the ratchet tooth ring 13
The input part 15 is held between the input part 15 and the collar 14 so that friction is generated between the input part 15 and the input part 15. When the ratchet pawl 19 attached to the main body 3 engages with the ratchet tooth ring 13, the ratchet tooth ring Input section 15 consisting of 13 and tsuba 14
If the direction of the inclined groove 16 is set so as to release the clamping state, this will cause the input part 15 to close when there is no load and the ratchet pawl 19 is not engaged with the ratchet tooth ring 13. It is ensured that the chain block can be operated without deceleration by directly connecting the output part 1.

The inclined groove 16 and the like may have a screw-like structure.

The inner circumferential walls 20 and 21 of the input section 15 are shaped eccentrically or symmetrically on the left and right about the center of the output rotating body 5 so that they contact or come very close to the rollers 9 and 10 fitted into the holding sections 11 and 12. The center of the radius of curvature is located at a position away from the fixed straight line of the symmetrical shape, and the center of the radius of curvature is located at a position located on the fixed straight line and away from the center of the output part, and the radius of curvature is located from the center of the output part 1 to the inner peripheral wall 20. The center of the radius of curvature of the inner peripheral wall 20,000 and the center of the radius of curvature of the inner peripheral wall 210 may be arranged symmetrically with respect to the center of the output section.

In the embodiment shown above, the rollers 9 and 10 are arranged in two rows, and the roller 9 is arranged between the rollers 10, but the two rows of rollers 9 and 10 are arranged in series, and the cylindrical body 7
The present invention can also be carried out by dividing into two parts, arranging the uneven parts in two rows, and positioning one row of uneven parts remaining between one row of uneven parts. Manufacture of the member 8 becomes easy.

In a chain block, the input section 15 may be a chain wheel on which a so-called hand chain is suspended, and the ratchet pawl 19 always applies force in the direction of engagement with the ratchet tooth ring 13 by means of an elastic body 22 such as a spring. put.

A base body 23 is mounted on the body 3 by a pin 24 so as to be able to swing within a certain range, and a hook 25 is provided on the top of the body 23 to hang the body 3 together with the base body 23.

A pressing portion 26 is provided at a position remote from the pin 24 of the base body 23 to press the ratchet pawl 19 so as to release the engagement between the ratchet pawl 19 and the ratchet tooth ring 13. The main body 3 is constantly pulled in the direction of the main body 3 by an elastic body such as a spring 27, and the base body 23 and the main body 3 are suspended from the upper part by the hook 25. When a downward load is applied to the output part 1, that is, the main body 3, the seventh As shown in the figure, the spring 27 is expanded and the pressing portion 26 releases the compressed state of the ratchet pawl 19 so that the ratchet pawl 19 engages with the ratchet tooth ring 13.

Although not shown, a stopper is provided between the base body 23 and the main body 3 as described above to stop the swing range of the base body 23 and the main body 3 within a certain limit.

A support body 28 integrally connected to the main body 3 is provided on the outside of the ratchet tooth ring 13 to restrict the movement of the ratchet tooth ring 13 in the lateral direction.

In addition, in the illustration, a gap is depicted between the ratchet tooth ring 13, the main body 3, and the support body 28 for ease of understanding, but in actual production, this gap may be eliminated. .

29 is a bolt that adjusts the pulling force of the spring 27; 30
is a nut, 31 and 32 are spring attachment parts, and 33 is a chino guide for a chino that is hung on the output part 1 provided in the main body.

In the above embodiment, when the cargo is suspended by the chain hanger 2 of the output section 1, a moment is generated in the output section 1 to rotate the output section 1 due to the weight of the cargo. 1 descends with respect to the base 23 together with the main body 3 as shown in FIG. 8 becomes unable to rotate in the direction in which the output side rotating body 5 is intended to rotate.

In this state, when the input section 15 is forcibly rotated to the right or left, a portion of the inner circumferential wall 20 or 21 of the input section 15 will be centered around a portion of the rollers 9 and 10 when viewed from a point on the holding member 8. The inner peripheral wall 20
Alternatively, the other part of the holding member 8 is displaced away from the center direction with the rotation of the input section 150 when viewed at a point on the opposite side of the holding member 8 to the above-mentioned point.

This means that a portion of the rollers 9 and 10 obliquely compresses the uneven portion formed by the output side rotary body 50, the cylindrical body 7, etc., and forcibly rotates the output side rotary body 5.

Further, the rollers 9 or 10 located on the opposite side of the center from the rollers 9 or 10 that obliquely pressed the uneven portion are the inner peripheral wall 2.
0 and 21 are displaced away from the center, they are pressed by the concave and convex portions of the output side rotating body 5, are pushed outward, and move within the range of 11° to 120° of the holding portion of the holding member 8.

Therefore, in the above embodiment, when the input section 15 is forcibly rotated to the right or left with the ratchet pawl 19 engaged with the ratchet tooth ring 13, the output side rotating body 5, that is, the output section 1 is rotated to 1/1 of the input section.
It can be forced to rotate to the right or left with a reduction ratio of 7, and cargo can be lifted or suspended at very low speed.

Even when the ratchet pawl 19 is engaged with the ratchet tooth ring 13, when the input part 15 is rotated in the direction of lifting the cargo with a force greater than that required for directly lifting the cargo, the input part 15, the holding member 8, and the ratchet are rotated. The toothed ring 13 and the output rotating body 5, that is, the entire output section 1 can be rotated together at the same speed, thereby making it possible to quickly raise the cargo. By making it impossible to rotate, it can be securely locked and ensure safety.

That is, in the illustrated example, the traction force is
However, when the input section 15 is rotated clockwise, the holding member 8 is rotated counterclockwise, and due to the action of the rollers 9 and 100 caused by the counterclockwise rotation of the holding member 8, the output rotating body 5 is also forced to rotate. On the other hand, if the operation of the input unit 15 is stopped while the cargo is lifted, the reverse rotation prevention device 13,1
9 functions to prevent rotation of the holding member 8, thus allowing the cargo to be maintained in the lifted state without any manipulation.

In addition, even when the reverse rotation prevention device 13° 19 is functioning, the input unit 150 can be rotated, and if the input unit 15 is rotated to the left, the holding member 8 will not rotate but the roller 9° 10 will be rotated. The output side rotary body 5 can be rotated clockwise by sequentially moving in the radial direction of the output side rotary body 5, and thus the lifted cargo can be lowered at a very slow speed.

As shown in FIG. 6, when there is no load applied to the output section 1, the ratchet pawl 19 is not engaged with the ratchet tooth ring 13, so the input section 15 and the output section 1 are held together with the holding member 8. Since the whole unit is directly connected and rotates as one, and the direction of rotation is both right and left, it is possible to quickly move the chino suspended from the chino hanging part 2 until a load is applied as described above. .

However, the present invention does not allow the base body 23 and the main body 3 to swing freely as in the above embodiment, and the hook 25 may be directly attached to the main body 3 (in this case, the ratchet pawl 19 can be attached to and disengaged from the ratchet tooth ring 13). This can be done manually or the like.

According to the present invention, a large number of uneven parts are provided on the outer periphery of the output side rotating body, and a number of rollers different from the above-mentioned uneven parts are arranged on the outer side, and the inner part of the input part is heated under load. A portion of the peripheral wall presses on a portion of the rollers to decelerate and rotate the output section.

At this time, if the rotation of the inner circumferential wall of the input section is not always maintained in an eccentric state with respect to the center of the output section, the output section that interlocks with the output side rotating body cannot be rotated smoothly. If the rollers were arranged in a line in the same way as the uneven parts, the input part itself would have to be configured so that its rotation would be eccentric, which would not only result in an extremely complicated structure, but also cause the rotation of the input part as a whole to become eccentric. Since there is a misalignment between the center and the center of rotation of the output rotating body, there arises a disadvantage that the input section cannot be rotated smoothly.

On the other hand, in the present invention, the rollers are divided in a direction parallel to the rotation axis and arranged in two or more rows around the circumference, and the inner peripheral wall contacts or is very close to one roller, and the rollers in the other rows. Since the center of the radius of curvature is placed at a symmetrical position with respect to the center of rotation of the rotating body, with the inner circumferential wall in contact with or very close to each other,
The phases of one inner circumferential wall and the other inner circumferential wall are exactly opposite.

Therefore, when one roller is pressed at one point on one inner circumferential wall, other points on the opposite side of the rotation center of this inner circumferential wall will not move away from the roller, but if the other points are adjacent to the inner circumferential wall, A point on the other inner circumferential wall adjacent to the point on which the rollers are about to be compressed is about to move away from the rollers of the other rows, and is adjacent to the inner circumferential wall that is about to move away from the rollers of one of the rows. The other parts of the passive inner circumferential wall try to press the rollers.

Therefore, the two inner circumferential walls of the input section are always trying to press the roller with one inner circumferential wall and the other inner circumferential wall at a point on the opposite side through the center, and are also trying not to separate, so this alone always It is possible to perform deceleration operation by compressing the rollers in a stable state.

[Brief explanation of the drawing]

The drawings show examples, and FIG. 1 is a perspective view of the invention in an exploded state when the invention is implemented in a chenoblock, FIG. 2 is a perspective view of a reduction mechanism part, FIG. 3 is a partial perspective view of an exploded state, and FIG. 4
5 is a side sectional view of the parts, FIG. 6 is a front sectional view under load, and FIG. 7 is a front sectional view under no load. 1...Output part, 2...Cheno hanging part, 3...Main body, 4...Bearing, 5
... Output side rotating body, 6 ... Semicircular recess, 7 ... Cylindrical body, 8 ... Holding member, 9
and 10...roller, 11 and 12...holding part, 13...ratchet tooth ring, 14...
・Brim, 15... Input part, 16... Inclined groove, 17... Locking body, 18... Elastic body, 19...・Ratchet pawls, 20 and 21...
...Inner peripheral wall, 22...Elastic body, 23...
- Substrate, 249. ... Pin, 25 ... Hook, 26 ... Curved pressing part, 27 ... Spring,
28... Support part, 29... Bolt, 3
0...Nut, 31 and 32...Mounting part, 33...Cheno guide.

Claims (1)

[Claims] 1. An output-side rotary body is rotatably attached to the main body, and the output-side rotary body is rotatably connected to the output part on which a chain or tether for forcibly towing another object is wrapped or suspended. A large number of uneven parts are formed at equal intervals, and a cylindrical holding member is rotatably provided on the outer periphery of the output side rotating body, and this holding member has a number of uneven parts close to the number of uneven parts of the output side rotating body. A holding part is provided to hold several rollers movably in a substantially radial direction, and the holding member part is provided with a reversal prevention device to prevent rotation in a direction opposite to the pulling direction, and the holding member and the rollers are An input part is rotatably disposed on the outer periphery, and the inner peripheral wall of this input part is approximately eccentric so that it contacts or is very close to the above-mentioned rollers, and the rollers are arranged around the circumference of the output-side rotating body. They are arranged in two or more rows, and the inner circumferential wall of the input section has one part that contacts or comes very close to the rollers in one row, and another part that contacts or comes very close to the rollers in the other row. A lifting or pulling device characterized in that the device is arranged at symmetrical positions with respect to the center of rotation of an output rotating body.