JP3408932B2 - Wire rope terminal support device for hoist - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire rope terminal supporting device in a hoist.

[0002]

2. Description of the Related Art An end of a wire rope which is lifted up and down by suspending a load in a hoist is engaged with and supported by an outer frame of a hoist body. The end of the wire rope of such a hoist was originally inserted into a rope terminal element having a diameter larger than this wire rope and brazed, and this wire rope was formed on the terminal support portion of the outer frame of the hoist body. The rope terminal element is inserted into the groove and is retained by being supported by the terminal element retaining seat formed at the back of the retaining groove. However, in such a wire rope terminal supporting device, when the hanging wire rope swings, the bending of the wire rope is intensively generated at the root portion of the rope terminal element and the bending stress is concentrated at the portion. However, there is a drawback that the life of the part is shortened.

In order to eliminate such drawbacks, a recent wire rope terminal supporting device has a semi-disc-shaped sheave capable of swinging the terminal portion of the wire rope in order to prevent concentration of bending of the wire rope. It uses a structure that locks and supports it so that it winds up. 5 and 6 show such a wire rope terminal support device. Note that FIG. 5 is a front view of the wire rope terminal supporting device, and FIG.
It is a b line sectional view.

The hanger 24, which is formed by bending a steel plate into an inverted U shape, is engaged with the outer frame body portion 28 of the hoist body by the sheave pin 25. The sheave pin 25 locks the sheave pin 25 by engaging a stopper 26 attached to the outer frame body portion 28 with a bolt 27 with a groove of the sheave pin 25. The semi-disk shaped sheave 38 formed by casting is arranged between the U-shapes of the hanger 24 so that the semi-circular outer peripheral surface faces upward, and the two sheave pins 2 are provided.
Attached to the hanger 24 by 9, 30. To prevent the sheave pins 29 and 30 from coming off, a stopper 31 attached to the hanger 24 with a bolt 32 is used.
It is performed by engaging with the grooves of 9 and 30.

The wire rope 34 having the rope terminal 40 brazed at the end thereof is fixed to the terminal catching seat formed on the lower part of one side of the sheave 38 after the rope terminal 40 is locked. The sheave 38 is wound along the semicircular outer peripheral surface, in other words, the rope supporting surface is wound along the outer peripheral surface of the sheave formed to have a positive curvature with respect to the winding direction of the wire rope. It hangs down. And, to prevent the wire rope 34 from loosening,
The steel plate is bent in an inverted U shape and the loosening metal fitting 36 to which the through bolt 37 is welded is inserted from the upper part of the hanger 24. This is done by tightening and fixing with a nut 35. In this wire rope terminal support device, a hexagon socket head cap screw 33 attached so as to project inside the lower portion of the hanger 24 is made to face a recess 38a formed on the side surface of the sheave 38. When disassembling the wire rope terminal support device, the sheave pin 2
When the sheave 38 is about to drop by pulling out 9, 30, the protruding portion of the hexagon socket head bolt 33 is engaged with the side wall of the recess 38a to prevent the sheave 38 from falling.

Such a wire rope terminal supporting device is
Since the number of components is very large, the manufacturing cost is high, and the size is large and the weight is increased.

When the wire rope 34 is replaced at a high place where a hoist is installed, the wing nut 35, the bolt 32 and the stopper 31 are removed to remove the sheave pins 29 and 30.
The sheave 38 that slides down by pulling out is hooked on the hexagon socket head cap bolt 33, but if the hooking is insufficient, the sheave 38 may fall. In addition, if the hexagon socket head cap screw 37 is accidentally removed first, the sheave 38 will immediately drop, so it is necessary to perform a preparatory work to fully understand the disassembly procedure in advance. It is a structure that hangs. When assembling, the sheave 38 must be lifted with one hand and the sheave pins 29 and 30 must be inserted with the other hand, which is an unsafe work especially in a high place where the footing is poor. Furthermore, the through bolt 37 of the loosening prevention metal fitting 36 must be manually inserted into the mounting hole located on the back surface side of the sheave 38, which requires skill in the alignment work. This is a common problem in maintenance and inspection work.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to facilitate wire rope replacement work and maintenance / inspection work, and to improve the safety of work in high places. To provide a device.

Another object of the present invention is to reduce the number of parts,
It is to provide a small, lightweight, and inexpensive wire rope terminal supporting device.

[0010]

SUMMARY OF THE INVENTION The present invention is a wire rope terminal supporting device for supporting an end of a wire rope of a hoist which is lifted and lowered by a load by being coupled to an outer frame body portion of a hoist body, the wire rope being provided on the outer periphery. A semi-disc-shaped rope support metal fitting formed with a rope groove around which the rope is wound and an end element locking seat for locking the rope terminal located at one end of the rope groove and having a holding metal fitting mounting seat formed on its outer surface. It is fixed to the outer frame body of the hoist body. Then, the wire rope wound around the rope groove by locking the rope end piece to the end piece locking seat of the rope support fitting is pressed by the rope holding fitting screwed to the holding fitting mounting seat.

The replacement and maintenance inspection of the wire rope can be easily performed by loosening the set screw of the rope pressing metal fitting from the outside of the rope supporting metal fitting. Therefore, the safety of these operations at a high place is improved, and the number of parts is small, so that the device is small, lightweight and inexpensive.

[0012]

1 is a front view of a hoist adopting a wire rope terminal supporting device according to the present invention, and FIG.
3 is a cross-sectional view taken along line aa of FIG. Figure 3
FIG. 4 is a front view of a wire rope terminal support part in which a rope support fitting formed by forging according to the present invention is fixed to an outer frame body of a hoist body, and FIG. 4 is a side view thereof.

In these figures, one rope terminal 3 is locked to a rope locking portion 2 formed at one end of a drum 1 built in the outer frame body portion 8 of the hoist body and wound around the drum 1. The other end of the wire rope 5 is unwound from the drum 1, folded back by the rotary sheave of the suspension hook portion 4, and locked to the rope support fitting 6 fixed to the outer frame body portion 8 of the hoist body.

The rope support fitting 6 has a V-shaped open rope groove 6a for winding the wire rope 5 around the outer circumference of a semi-disc member, and one end of the rope groove 6a has a rope end at the other end. A terminal child locking seat 6b for locking the child 12 and a projection 6c for supporting the rope terminal child 12 so as not to come off are provided. Further, on the rope pull-out side of the rope support fitting 6, the rope pull-out is so arranged that the wire rope 5 hangs in the maximum swing range C, D, E, and F of the wire rope 5 without being disengaged from the rope groove 6a. The height L2 of the side flange 6d and the rope groove extension arc length L5 are set. That is, the rope pull-out side flange 6d opened in a V shape supports the swing of the wire rope 5 swinging in the swing ranges C and D so that the wire rope 5 deviates from the rope groove 6a or the bending is concentrated. The height dimension L2 is set so as to prevent the occurrence of. The end of the rope groove 6a on the rope pull-out side has swing ranges E and F.
The dimension L5 is set so as to form an extended arc portion that can guide the wire rope 5 that swings at a gentle bend. Further, the height of the flange 6e on the upper side of the rope support fitting 6 is such that when the wire rope 5 is wound around the rope groove 6a, the upper surface of the wire rope 5 is the flange 6e.
It should be formed so that it is only L1 away from e. Furthermore,
The flange at one corner on the upper side of the rope support fitting 6 is formed as a protruding portion 6f so as to form a step for pressing the lateral displacement of the rope holding fitting 7 described later.

Further, the rope support metal fitting 6 is provided with a holding metal fitting mounting seat 6g for mounting the rope pressing metal fitting 7 in the lower center of the outer side surface in a direction perpendicular to the outer side surface, and the upper side has a thick wall. As described above, the inner surface of the rope is welded and fixed to the outer surface of the hoist body outer frame body portion 8 made of a steel plate so that the direction of the rope groove 6a substantially coincides with the pulling direction of the wire rope 5. I am trying to become. The rope support fitting 6 may be fixed to the outer frame body portion 8 of the hoist main body by a screwing method or a caulking method using a connecting pin in addition to welding.

The rope holding metal fitting 7 is formed of a steel plate, and an upper portion 7a thereof prevents the wire rope 5 wound along the rope groove 6a from coming off the rope groove 6a, and the wire rope 5 is lifted more than the lifting height. When it is unwound and loosened, the wire rope 5 is pushed to the bottom of the rope groove 6a by pressing the outer circumference of the wire rope 5 so that the rope terminal 12 does not get over the protrusion 6c and come out of the terminal catching seat 6b. It is bent into an L shape for pressing. The lateral portion 7b covers the outside of the rope pull-out side flange 6d of the rope support fitting 6 and is bent in an L-shape so that the wire rope 5 does not come out of the rope groove 6a. Further, the central lower portion 7c is bent in the opposite direction to these and the mounting bolt 16 is welded thereto.

A wing nut 1 is formed by inserting a mounting bolt 16 from an upper side into a mounting hole 6h formed in a holding metal mounting seat 6g so as to project it downward, and fitting a washer 17 on the projecting portion.
8 is screwed and tightened so that the mounting bolt 16 is pulled in, so that the rope pressing metal fitting 7 is fixed to the pressing metal fitting mounting seat 7c along the outer surface of the rope supporting metal fitting 6, and as described above, The rope groove 6a
And the outside of the rope pull-out side flange 6d is covered. The length of the mounting bolt 16 is such that when the wing nut 18 is loosened to the lower end of the mounting bolt 16 and the rope pressing metal fitting 7 is lifted along the outer surface of the rope supporting metal fitting 6, the rope supporting metal fitting 6 and the rope pressing metal fitting. The length is such that a gap for removing the wire rope 5 from the rope groove 6a can be formed between the wires 7.

When the rope pressing metal fitting 7 is moved in a direction perpendicular to the outer surface of the rope supporting metal fitting 6 or is rotated along the outer surface to be fixed and disassembled, the pressing metal fitting mounting seat 6g is , Is formed parallel to the outer surface of the rope support fitting 6, and the mounting hole 6h is formed in a direction perpendicular to the surface. Then, the mounting bolt 16 for mounting the rope pressing metal fitting 7 on the pressing metal fitting mounting seat 6g is
The pressing metal fitting seat 6g is attached and detached in a direction perpendicular to the mounting seat 6g.

The holding metal fitting seat 6g may be formed in the same shape as a member protruding from the outer frame body portion 8 of the hoist body.

The wire rope terminal supporting device constructed as described above is a butterfly screwed to a mounting bolt 16 for attaching the rope pressing metal fitting 7 to the outer surface of the rope supporting metal fitting 6 fixed to the outer surface of the hoist body outer frame body portion 8. By simply loosening the nut 18, the wire rope 5 can be replaced and the component maintenance and inspection work can be performed. Therefore, for hoists installed at high places, component replacement work and maintenance and inspection work can be facilitated and safety Also improves. Also, since the number of components is small,
It is small and lightweight.

Further, with respect to the swing of the wire rope 5 due to the swing of the load, the swing of the wire rope 5 in the C and D directions is made by the high-strength (L2) rope pull-out side flange 6d forming the rope groove 6a. By supporting the wire rope 5
Is prevented from deviating from the rope groove 6a and the concentration of bending is prevented, and swinging in the E and F directions is performed by extending an arc portion (L) of the rope groove 6a.
5) Guide and gently bend to prevent concentration of bending. By thus preventing the local bending of the wire rope 5, it is possible to prevent the life of the wire rope 5 from being shortened due to the concentration of bending stress.

[0022]

According to the present invention, the wire rope is attached by loosening or tightening the screw for attaching the rope pressing metal fitting to the rope supporting metal fitting from the outside of the rope supporting metal fitting fixed to the outer surface of the outer frame body of the hoist body. Since it is possible to perform replacement and maintenance / inspection work of components, it is easy to perform component replacement work and maintenance / inspection work for a hoist installed at a high place, and safety is also improved. Moreover, since the number of components is small, the size and weight are reduced.

With respect to the swing of the wire rope due to the swing of the load, the swing of the wire rope is supported by a high-strength rope pull-out side flange to prevent the wire rope from deviating and concentrating in bending. Further, it is possible to prevent concentration of bending by guiding with the extended arc portion and gently bending, and it is possible to prevent shortening of the life of the wire rope due to concentration of bending stress.

[Brief description of drawings]

FIG. 1 is a front view of a hoist that employs a wire rope terminal supporting device according to the present invention.

FIG. 2 is a cross-sectional view taken along line aa of FIG. 1 with a hanging hook portion added.

FIG. 3 is a front view of a wire rope terminal support portion in which the rope support fitting according to the present invention is integrally attached to the outer frame body portion of the hoist body.

FIG. 4 is a side view of FIG.

FIG. 5 is a front view of a conventional wire rope terminal supporting device.

FIG. 6 is a side view of FIG.

[Explanation of symbols]

5 wire rope 6 rope support metal fittings 6a rope groove 6b Terminal locking seat 6d Rope pull-out side flange 6g Presser bracket mounting seat 7 Rope holder 8 Hoist body outer frame body 12 rope terminal child 16 mounting bolts 18 wing nut

Claims (5)

(57) [Claims] 1. A wire groove terminal supporting device for supporting an end of a wire rope of a hoist which is lifted and lowered by a load by being coupled to an outer frame body of a hoist body , and a rope groove around which the wire rope is wound and the rope groove.
End element locking that locks the rope terminal at one end of the
Mold the seat and attach the retainer mounting seat to the outer surface of the seat.
Attach the formed semi-disc shaped rope support bracket to the outer frame of the hoist body.
It is firmly attached to the body and is attached to the end locking seat of the rope support fitting.
A wire rope that locks the terminal and is wound around the rope groove.
From the outside with a screw
A wire rope terminal support device for hoists, which is characterized in that it is pressed by a press fitting . 2. The rope support fitting according to claim 1.
Is formed by cutting, casting or forging steel sheets
And a wire rope terminal supporting device for a hoist, which is fixed to the outer frame body of the hoist body . 3. The rope according to claim 1 or 2,
The holding metal fitting should cover the rope support
And the rope pull-out side is L-shaped along the rope support bracket
Bend it in the shape of
Bend and weld the mounting bolts to form and mount
With the nut that is screwed onto the bolt
A wire rope terminal supporting device characterized by being attached to . 4. The odor according to any one of claims 1 to 3.
The flange forming the pull-out side of the rope groove is
A wire rope terminal support device characterized by being formed to be taller than other regions . 5. A hoist wheel that lifts and lowers by suspending a load.
Connect the end of the ear rope to the outer frame body of the hoist body and support it.
In the wire rope terminal supporting device to be held, the rope groove around which the wire rope is wound and the rope groove
End element locking that locks the rope terminal at one end of the
The hoist body is a semi-disc-shaped rope support bracket with a molded seat.
It is fixed to the outer frame body and used as a terminal locking seat for this rope support fitting.
The wire rope that locks the rope terminal and winds it around the rope groove.
Attach the rope retainer that holds the rope to the outer frame of the hoist body.
Screw from the outside to the holding metal mounting seat formed on the
The wire rope terminal support device for hoists, which is characterized by being fixed .