JPH057313B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a hoist.

[Conventional technology]

As shown in Jitsukainuma No. 60-56692, a conventional winding machine has one end of a wire rope attached to a winding drum, and both ends of the shaft attached to two support plates provided on an outer frame. , An inverted U-shaped hanging bracket is rotatably suspended from this shaft, a sheave for attaching the wire rope end pin is attached to this bracket with a pin, and a socket attachment part is attached to the downwardly protruding end of the sheave. It is known that the other end of the wire rope is wound around a part of the sheave U groove and a socket is attached to the tip of the wire rope, and the socket is attached to the attachment part.

Further, Japanese Utility Model Publication No. 47-9220 describes a rope end attachment device for a winding machine that winds the rope 3 around the cylinder 2 a plurality of times to reduce friction per rope.

[Problem that the invention seeks to solve]

In the former hoisting machine, the other end of the wire rope was only wound around a part of the U-groove of the sheave, so the contact resistance was small and the load reduction effect was small. For this reason, a large force is applied to the socket portion of the wire rope due to the impact value or overload when lifting a load, and the reliability of the socket portion has been a problem.

In addition, in the latter device, a skewer shaft attached to the winding drum frame is inserted into the tapered part of the inner surface of the cylinder 2, and the load is oscillatingly supported at a single point of contact between the skewer shaft and the tapered part of the cylinder. Therefore, there is a problem that the load is concentrated on one point and the skewer shaft or cylinder body is easily damaged.

The purpose of the present invention is to focus on the above-mentioned points, obtain good load support between the sheave and wire rope within the swing range of the hanging fitting, and reinforce the area where bending stress occurs due to an out-of-plane load at the bent part of the hanging fitting. By reducing the thickness of the lifting fittings, making them lighter and smaller, and making them easier to form, we also prevent the wire rope from interfering with the sheave, reducing the shock value and overload when lifting a load. In contrast, the object is to improve the reliability of the other end attachment part of the wire rope.

[Means for solving problems]

The purpose is to attach one end of the wire rope 3 to the winding drum 2, attach both ends of the shaft 11 to the outer frame 6,
An inverted U-shaped hanging fitting 12 is rotatably suspended from this shaft 11, a sheave 13 is attached inside this hanging fitting 12, and the other end of the wire rope 3 is connected to the sheave 13 through the outer frame 6. In a hoisting machine having an outer frame 6 attached, a groove 26 is formed around the entire circumference of the sheave 13, and a crest 23 is formed only in the upper part of the groove 26 to form a plurality of grooves 22A and 22B. , the sheave 13
Turn the other end of the wire rope 3 one or more turns so that the wire rope 3 is located in each of the plurality of grooves 26, 22A, and 22B, and the vertical center of the shaft 11 and the center of the beginning of the wire rope 3 are aligned. substantially coincide with each other, the hanging fitting 12 is made asymmetrical with respect to the shaft 11, and reinforcing plates 21 having through holes 20 of the shaft 11 are welded and fixed to both sides of the bent portion 19 of the hanging fitting 12, respectively. achieved by.

[Effect]

The effects of the above configuration and an embodiment described later are as follows. When lifting and lowering a load, the load of the suspended load acts on the wire rope and loads the sheave, but since the wire rope is wrapped around the sheave more than once, the contact resistance between the wire rope and the sheave is extremely high. The other end of the wire rope is supported under load conditions in which the load is significantly reduced at this portion.

As a result, sufficient reliability of the attachment part at the other end of the wire rope can be obtained against overloads such as instantaneous shock value when lifting a load, and fatigue damage of this attachment part can be ensured even after repeated use. can be prevented.

In addition, when a load is applied to the wire rope, the vertical center of the shaft and the wire rope at the beginning of winding of the wire rope are aligned, so the direction of the wire rope at the beginning of winding and the direction of the U groove are on the line of load action. The wire rope does not forcefully come into contact with the flange, and the load can be supported well within the swinging range of the hanging fitting.

Furthermore, regarding the ability of the sheave to follow the swinging and diagonal pulling due to load and load swing, since the hanging fitting is rotatably suspended from the shaft, swinging in the circumferential direction of the shaft is possible. Furthermore, the wire rope itself can absorb the deflection and diagonal pull in the direction perpendicular to the deflection of the metal fittings. Therefore, by absorbing the swing in the combination of the two directions described above, it is possible to easily follow the swing in the forward direction, and no unreasonable bending load is applied to the wire rope.

In addition, the wire rope wound around the U-groove of the sheave can be prevented from loosening in the U-groove by grasping the socket side and the anti-socket side with hands and making interlocking movements of pushing and pulling. The end portion of the wire rope (the portion wound around the sheave) can be easily pulled out. Conversely, the wire rope end portion that has been pulled out can be easily returned to its original position in the same manner. Therefore, the wire rope end portion can be easily inspected. In particular, since the socket is exposed to the outside from the end of the hanging fitting and sheave, it can be easily pinched and pulled out, and the end of the wire rope can be pulled down vertically. inspection is easy.

Reinforcing plates with shaft through holes are welded and fixed to both sides of the bent part of the hanging fitting, so even if the hanging fitting is asymmetrical to the axis, it will not be affected by out-of-plane loads between the hanging fitting and the bent part. Can reinforce areas where bending stress occurs,
As a result, the plate thickness of the hanging fitting can be reduced, making it lightweight and compact and easy to mold.

In addition, since the U-groove is divided into two U-grooves by forming a peak at the top of the sheave, adjacent wire ropes do not interfere with each other, and by having the peak only at the top, the thickness of the sheave can be reduced. Dimensions can be reduced.

Furthermore, to assemble the wire rope socket, start winding the wire rope from one side of the U-groove of the sheave.
By winding the U-groove and wrapping it around the other side of the U-groove, the wire rope can be easily inserted into the vertical groove through the notch in the flange of the sheave at the end of the winding of the wire rope. The socket can be easily attached to the socket mounting seat.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 7.

First, the overall configuration of the hoisting machine 1 will be explained based on FIG. 7. The other end of a wire rope 3 is fixed to a socket 4 on a winding drum 2 of a winding machine 1. The socket 4 is attached to a wire rope end attachment device 8 attached to an intermediate portion of two support plates 7 provided on the outer frame 6 of the hoist 11. The outer frame 6 and the support plate 7 are made of steel plate. Note that the support plate 7 constitutes a part of the outer frame 6. A hook block 5 is suspended in the middle of the wire rope 3. A load is suspended from this hook block 5. A control box 9 containing electrical components is attached to the tip of the support plate 7. The operation of the hoist 1 is controlled by a control device in the control box 9. A limit lever 10 is attached to the support plate 7 and extends above the hook block 5 from a portion of the support plate 7. When the hook block 5 rises and comes into contact with the limit lever 10, the lift of the hook block 5 is stopped.

Next, the configuration of the wire rope end attachment device 8 will be explained based on FIGS. 1 to 6. Both ends of the shaft 11 are attached to two support plates 7 of the outer frame 6.
An inverted U-shaped hanging fitting 12 is rotatably suspended from this shaft 11. A sheave 13 for attaching a wire rope end is arranged inside this hanging fitting 12, and the sheave 13 is attached to the hanging fitting 1 with two pins 14 passed through on the left and right.
It is attached to 2. A key plate 15 is fixed to the support plate 7 with bolts 16 to prevent the shaft 11 from coming off. The key plate 15 is locked to a part of the shaft 11 (FIG. 3). 2 pins 14
A key plate 15 is fixed to the hanging fitting 12 with bolts 18 to prevent it from coming off. The key plate 15 is locked to a portion of the two pins 14. The shaft 1 is attached to both sides of the bent portion 19 of the hanging fitting 12.
Reinforcement plates 21 each having one through hole 20 are fixed by welding. This reinforcing plate 21 is set to be slightly larger than the outer shape of the bent portion 19 of the hanging fitting 12. Two U-grooves 22A and 2 with a peak 23 formed in the center of the upper half of the outer peripheral surface of the sheave 13 disc portion 13A.
2B is formed. The remaining lower half of the outer circumferential surface of this disc part is not provided with the peak part 23, and one flange part 2 has a notch part 24 of about 1/4 circumference.
5A and the other flange part 25B make a wide U groove 2.
6 is formed. A flange portion 25B of the disc portion 13A integrally projects downward to form an end portion 13B. A wide U is attached to this terminal portion 13B.
A vertical groove 27 for attaching and detaching the socket is formed at a position communicating with the groove 26 and coinciding with the surface of the U groove 22A. A socket mounting seat 29 having a spherical seat surface 28 connected to the vertical groove 27 and a cylindrical hole is formed. Disk portion 13A and U grooves 22A, 22B, 2
A load support hole 30 and a rotation stopper hole 31 are formed at positions on the inner side of 6. The pin 14 is passed through the load support hole 30 and the rotation stopper hole 31. The bent portion 19 of the hanging fitting 12 is widened toward the U groove 22A side so that the bent portion 19 of the hanging fitting 12 substantially coincides with the vertical center 32 of the shaft 11 and the center 33 of the U groove 22B of the sheave 13. It is bent and has an asymmetrical shape with respect to the center 32 of the shaft 11.

To assemble the socket 4 of the wire rope 3, start winding the wire rope 3 from the sheave 13 and the U-groove 22B side, wrap it around the U-groove 26, wrap it around the U-groove 22A side, insert it into the vertical groove 27, and connect it to the winding start side. By pulling the wire rope 3, the socket 4 is attached to the socket mounting seat 29. In particular, since the notch 24 of the flange 25A on the winding end side is formed, the wire rope 3 can be easily inserted into the vertical groove 2 through this notch 24.
7 can be inserted. This wire rope 3
After inserting the assembled state of the sheave 13 into the hanging fitting 12 and passing through the two pins 14, the supporting plate 17
The wire rope 3 and sheave 13 are attached to the hanging fitting 12 by fixing them with bolts 18.

When a load is suspended on the hook block 5 and lifted or lowered, the load of the suspended load acts on the wire rope 3 and loads the wire rope terminal device 8, but the wire rope 3 is wound around the sheave 13 one or more times. Since the socket 4 is attached to the socket seat 29, the wire rope 3 and the U grooves 22B, 26, 22A
The socket 4 is supported by the socket mounting seat 29 under a load condition in which the contact resistance force with the socket 4 becomes extremely large and the load is significantly reduced in this area. As a result, sufficient reliability of the four socket parts can be obtained against the instantaneous impact value and overload when lifting a load, and fatigue damage of the four socket parts can be prevented even with repeated use. I can do it.

In addition, when a load is applied to the wire rope 3, since the vertical center of the shaft 11 and the center of the beginning of winding of the wire rope 3 are aligned, the direction of the wire rope 3 and the direction of the U groove 22B at the beginning of winding is can be aligned with the line of load action, and the load can be supported satisfactorily within the swinging range of the hanging fitting 12 without making unreasonable contact with the flange portion 25B.

Furthermore, regarding the followability of the wire rope end attachment device 8 against swinging, tilting, pulling, etc. due to load swing, since the hanging fitting 12 is rotatably suspended from the shaft 11, the circle of the shaft 11 In addition, the wire rope 3 wraps around and unwraps around the U grooves 22B and 26, and the wire rope 3 itself can swing around in the circumferential direction. , can absorb runout and diagonal pull.
Therefore, by absorbing the swing in the combination of the two directions described above, it is possible to easily follow the swing in all directions, and no unreasonable bending load is applied to the wire rope 3.

The portions of the wire rope 3 wound around the U grooves 22A, 22B, and 26 of the sheave 13 are held in the U groove 22 by grasping the socket 4 side and the anti-socket side by hand, respectively, and interlockingly pushing and pulling each other.
Due to the loosening of the wire ropes in A, 22B, and 26, the end portion of the wire rope (the portion wound around the sheave 13) can be easily pulled out as shown in FIG. Conversely, the pulled-out wire rope end portion can be easily returned to its original position in the same manner.

Therefore, the wire rope end portion can be easily inspected. In particular, since the socket 4 is exposed to the outside from the hanging fitting 12 and the terminal part 13B of the sheave 13, it can be easily picked up and pulled out, and the terminal part of the wire rope can be pulled down vertically. It is also easy to inspect the wire rope from this point.

In addition, shafts 11 are provided on both sides of the bent portion 19 of the hanging fitting 12.
Since the reinforcing plates 21 each having a penetrating portion 20 of It can be reinforced and thereby the thickness of the hanging metal fitting 12 can be reduced, so that it is possible to reduce the weight and size and facilitate the molding process.

Furthermore, since the crest 23 is formed in the upper part of the sheave 13 and the U groove 26 is divided into two U grooves 22A and 22B, the adjacent wire ropes 3 do not interfere with each other, and the ridge 23 is formed only in the upper part. By doing so, the thickness of the sheave 13 can be reduced.

〔Effect of the invention〕

As described above, in the present invention, one end of the wire rope 3 is attached to the winding drum 2, both ends of the shaft 11 are attached to the outer frame 6, and the inverted U-shaped hanging fitting 1 is attached to the shaft 11.
2 is hung rotatably, a sheave 13 is attached within the hanging fitting 12, and the other end of the wire rope 3 is attached to the outer frame 6 via the sheave 13. Concave groove 2 around the entire circumference of
6 is formed, and a mountain portion 23 is formed only on the upper part of this groove 26.
to form a plurality of grooves 22A, 22B,
A plurality of grooves 26, 22A, 22 of the sheave 13
Turn the other end of the wire rope 3 one or more turns so that the wire rope 3 is located in the center of the arrow B, so that the vertical center of the shaft 11 substantially coincides with the center of the beginning of the wire rope 3, and The metal fitting 12 is attached to the shaft 11.
Since the reinforcing plates 21 having the through holes 20 of the shaft 11 are fixed by welding on both sides of the bent portion 19 of the hanging fitting 12, the sheave and the Good load support with the wire rope can be obtained, the area where bending stress occurs due to out-of-plane loads at the bent part of the hanging fitting is reinforced, the plate thickness of the hanging fitting is thinned, and the hanging fitting is made lighter and smaller and easier to form. Furthermore, by preventing the wire rope from interfering within the sheave, the reliability of the attachment at the other end of the wire rope is improved against shock value and overload when lifting a load, increasing safety. We can provide high winding machines.

[Brief explanation of drawings]

FIG. 1 is a partially sectional perspective view of the other end attachment part of the wire rope of the hoisting machine of the present invention, FIG. 2 is a side view of the attachment part, FIG. 3 is a front view of the attachment part, and FIG. 4 5 is a partially sectional front view of the sheave of the same hoisting machine, FIG. 5 is a partially sectional side view of the same sheave, FIG. 6 is a perspective view of the mounting part in the socket pulled out state, and FIG. 7 is the same hoisting machine. FIG. 1... Hoisting machine, 2... Drum, 3... Wire rope, 4... Socket, 5... Hook block,
6...Outer frame, 7...Support plate, 8...Wire rope terminal attachment device, 11...Shaft, 12...Hanging fitting, 1
3... Sheave, 19... Bent part, 20... Through hole, 21... Reinforcement plate, 22A, 22B... U groove,
23... Mountain part, 24... Notch part, 25A, 25B
...Flange part, 26...U groove, 27...Vertical groove,
28... Ball bearing surface, 29... Socket mounting seat.

Claims (1)

[Claims] 1. One end of the wire rope 3 is attached to the winding drum 2, both ends of the shaft 11 are attached to the outer frame 6, and the shaft 11 is attached to the outer frame 6.
An inverted U-shaped hanging fitting 12 is rotatably suspended from the hanging fitting 12, a sheave 13 is attached within the hanging fitting 12, and the other end of the wire rope 3 is attached to the outer frame 6 via this sheave 13. In the hoisting machine, a groove 26 is formed around the entire circumference of the sheave 13, a mountain portion 23 is formed only in the upper part of the groove 26, and a plurality of grooves 22A and 22B are formed.
Turn the other end of the wire rope 3 one or more turns so that the wire rope 3 is located in each of the plurality of grooves 26, 22A, and 22B, and the vertical center of the shaft 11 and the center of the beginning of the wire rope 3 are aligned. substantially coincide with each other, the hanging fitting 12 is made asymmetrical with respect to the shaft 11, and reinforcing plates 21 having through holes 20 of the shaft 11 are welded and fixed to both sides of the bent portion 19 of the hanging fitting 12, respectively. A hoist featuring: