JPH0530082U - Wire entanglement elimination device for hook retractable crane - Google Patents

Abstract

(57) [Abstract] [Purpose] Eliminates the entanglement of the wire stretched between the boom tip and the hook body, and when the hook body is retracted, the arm tip is securely inserted into the guide, Be sure to store and place. A hook retractable crane configured to retract and arrange a hook body 4 along a boom 1, wherein an arm 5 provided at a boom tip 2 includes a boom tip 2 and a boom tip 2.
A wire guide 9 for individually restricting each moving range of the wire 3 wound a predetermined number of times between the and the hook body 4 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wire entanglement eliminating device for eliminating entanglement of a wire stretched between a boom tip portion and a hook body in a hook retractable crane.

[0002]

[Prior Art]

 Conventionally, the hook main body is hung from the boom tip part via a wire, and the hanging hook is horizontally supported on the hook main body, and the hook is wound and unwound by a winch device around which the wire is wound. Cranes that raise and lower the main body and the hanging hook are well known.When hoisting the hook main body, the arm suspended at the boom tip is inserted and locked in the guide of the hook main body, and the wire is wound by the winch device. By using the force to rotate the arm to the boom side, the hook body was arranged to be retracted along the boom.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional one, when the wire stretched between the boom tip and the hook body is entangled, the entanglement causes a positional deviation between the arm tip and the hook body guide. As a result, there is a problem in that the tip of the arm is not inserted into the guide and the hook body cannot be stored and arranged along the boom.

The present invention has been made in view of the above problems, and eliminates the entanglement of the wire stretched between the boom tip and the hook body, and when the hook body is retracted, the tip of the arm is set in the guide. The purpose is to insert the hook securely and to securely store the hook body.

[0005]

[Means for Solving the Problems]

 The wire entanglement eliminating device in the hook retractable crane of the present invention suspends the hook main body at the boom tip through the wire wound around the winch device, and the hanging hook is horizontally supported by the hook main body. During the winding of the hook body, the arm suspended at the tip of the boom is inserted and locked in the guide of the hook body, and the arm is turned to the boom side by using the wire winding force of the winch device. A hook retractable crane configured to retract the hook body along the boom, wherein the arm has each movement of a wire wound a predetermined number of times between the boom tip and the hook body. It is equipped with wire guides that regulate the range individually.

[0006]

[Action]

 When the hanging hook is moved up and down by winding and unwinding the wire, the wire stretched between the tip of the boom and the hook body is individually regulated in each movement range by the wire guide, so entanglement is unlikely to occur. , Even if entanglement occurs, the entanglement can be quickly unraveled by the wire guide.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

2 and 3 show a peripheral portion of a boom tip portion of a hook retractable crane according to the present invention.

In the figure, reference numeral 1 denotes a boom configured to be extendable and contractible, and a hook body 4 is suspended from a boom tip portion 2 via a wire 3.

For example, the boom 1 is configured to be rotatable about a base end portion thereof and to be capable of undulating.

The wire 3 is wound around a winch device (not shown) provided on the base end side of the boom 1, and can be wound and unwound by the operation of the winch device.

The tip of the wire 3 is wound around one pulley 21 of the two pulleys 21 and 22 provided on the boom tip 2 and hung down, and then the hook provided on the hook main body 4 is pulled. The reel 41 is wound and rewound around the other pulley 22 provided on the boom tip portion 2 again, and then drooped again and fastened to the fastening member 42 provided on the hook body 4.

An arm 5 is suspended from the boom tip portion 2. A long hole 51 is formed at the base end of the arm 5, and the pin 23 provided on the boom tip 2 is inserted into the long hole 51 so that the base end of the arm 5 is located at the boom tip 2. Suspended and supported by.

A base end portion 61 of the hanging hook 6 is horizontally supported by a pin 62 on the hook body 4.

A stopper 7 that is slidable in the vertical direction is provided above the base end portion 61 of the hanging hook 6. The stopper 7 is configured to slide vertically by being guided by a guide 72 by inserting a long hole 71 formed at an upper end portion (one end portion) of the shaft member 41a of the pulley 41, and The lower end portion (the other end portion) 73 is an abutting portion that comes into contact with the base end portion 61 of the hanging hook 6 to prevent the hanging hook 6 from rotating.

Further, a guide 8 is provided on the upper part of the hook body 4 for guiding the tip 52 of the arm 5 to come into contact with the upper end of the stopper 7 when the hanging hook 6 is wound up.

Further, a wire for individually restricting each moving range of the wire 3 wound a predetermined number of times between the boom tip 2 and the hook body 4 as described above near the tip 52 of the arm 5. A guide 9 is provided.

As shown in FIG. 1, the wire guide 9 is formed with two large and small wheels 91 and 92. The wire 3 is wound around one pulley 21 of the boom tip 2 and hangs down. The looped portion is inserted into a smaller wheel (right wheel in FIG. 1) 91, and the portion raised by winding the pulley 41 of the hook main body 4 into a larger wheel (left wheel in FIG. 1) 92. The portion of the boom tip 2 which is inserted and wound around the other pulley 22 of the boom tip 2 passes through the outside between the wheels 91 and 92 and is fixed to the hook body 4.

Reference numeral 10 in FIG. 2 is a guide pulley provided on the boom 1 for guiding the wire 3, and 43 is a wire holding member provided on the hook body 4 for preventing the wire 3 from coming off from the pulley 41. Is. Further, reference numeral 11 is a stopper projecting from the lower end of the base boom to determine the storage position of the hook body 4.

Next, the operation of the hook retractable crane thus configured will be described.

First, in the case of performing a normal crane operation, the hook body 4 and the hanging hook 6 are moved up and down by hoisting or unwinding the wire 3 by the operation of the winch device, and at the same time, the boom is extended, contracted, raised and lowered, and swung. By doing so, the suspended object hooked on the suspension hook 6 is transferred to the target position.

The wire 3 stretched between the boom tip portion 2 and the hook body 4 during the lifting operation of the hanging hook 6 by winding or unwinding the wire 3 as described above is Since each moving range is individually regulated by this, entanglement is unlikely to occur, and even if entanglement occurs, the wire guide 9 can easily unentangle.

Next, when the crane operation is completed and the hook is to be retracted, first, the boom 1 is extended, retracted, swung, and swung while the hook body 4 is hung from the boom tip 2 to an appropriate length by the winch device. Then, the boom 1 is placed in the storage position. After that, the wire 3 is wound up by the winch device so that the hook body 4 and the hanging hook 6 are lifted to the boom tip 2 side. When the hook body 4 and the hanging hook 6 are lifted, the tip portion 52 of the arm 5 provided on the boom tip portion 2 is guided by the guide 8 of the hook body 4 and inserted into the guide 8. The tip 52 contacts the upper end of the stopper 7.

When the tip of the arm 5 is guided into the guide 8 and inserted, and if the wire 3 is entangled, the entanglement causes the mutual positions to shift and the tip of the arm 5 to be guided. Although it may not be inserted into the guide 8, the wire guide 9 eliminates the entanglement of the wire 3 so that the tip of the arm 5 is reliably inserted into the guide 8.

When the hook body 4 is further raised from this state, the tip of the arm 5 pushes the stopper 7 downward, and the lower end 73 of the stopper 7 pushes the base end 61 of the hanging hook 6. However, this pressing force acts to prevent the suspension hook 6 from rotating. Along with this, the arm 5 moves upward by an amount corresponding to the elongated hole 51 formed at the base end of the arm 5, and the arm 5 moves completely upward, and at the same time, the wire guide 9 and the projecting object integral with the arm 5. When 93 is in contact with the upper end of the guide 8, the hanging hook 6 is completely prevented from rotating and is in a fixed state.

When the wire 3 is further wound by the winch device with the hanging hook 6 fixed in this way, the winding force causes the arm 5 to move the pin 23 to the pin 23 due to the offset between the pin 23 and the shaft member 41a. 2, the arm 5, the hook body 4, and the hanging hook 6 rotate along the boom 1 until the hook body 4 comes into contact with the stopper 11. It is placed in the storage position (see Figure 4).

As described above, the suspension hook 6 is arranged in a fixed state in which the suspension hook 6 is completely prevented from rotating in the stored state.

[0028]

[Effect of the device]

 As described above, according to the present invention, since the wire stretched between the boom tip and the hook body is individually regulated in each moving range by the wire guide, the entanglement generated in the wire by the wire guide. The hook body and the hanging hook can be securely stored and arranged by securely inserting the tip of the arm into the guide.

[Brief description of drawings]

FIG. 1 is a plan view showing a wire guide.

FIG. 2 is a side view showing a peripheral portion of a boom tip portion of the hook retractable crane.

FIG. 3 is a front view showing a peripheral portion of a boom tip portion of the hook retractable crane.

FIG. 4 is a side view showing a state in which the hook body and the hanging hook are stored and arranged.

[Explanation of symbols]

 1 boom 2 boom tip 3 wire 4 hook body 5 arm 6 suspension hook 8 guide 9 wire guide

Claims (1)

[Scope of utility model registration request] 1. A hook main body is hung on a boom tip end part through a wire wound around a winch device, and a hanging hook is horizontally supported on the hook main body. When the hook main body is wound up, An arm hung at the tip of the boom is inserted and locked in a guide of the hook body, and the arm is rotated toward the boom side by using the winding force of the wire by the winch device to store and arrange the hook body along the boom. A hook retractable crane configured as described above, wherein the arm is provided with a wire guide for individually restricting each moving range of the wire wound a predetermined number of times between the boom tip portion and the hook body. A wire entanglement elimination device for a hook retractable crane characterized by: