JP2001206670A - Suspension hook for crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suspension hook for a crane capable of omitting the arrangement of a worker in a vertical shaft in the work for storing surplus soil in a sediment bucket and lowering it into the vertical shaft with the crane. SOLUTION: This suspension hook 1 compresses a hook body 2 locked with the inversion rope R of the sediment bucket B, a trip lever 3 rotatably provided on the hook body 2, and an operation rope 4 for rotating the trip lever 3 to a trip position. The suspension band T of the sediment bucket B loaded with surplus soil is hooked on a hook 6, the sediment bucket B is lowered into the vertical shaft with the open section of the hook 6 kept closed by a closing bar 8, then the operation rope 4 is pulled from above to rotate the trip lever 3 to the trip position, and the suspension band T is removed from the hook 6. The hook body 2 is hoisted together with the inversion rope R, and the sediment bucket B is inverted for unloading.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hanging hook for a crane used for hanging earth and sand downward such as backfilling a shaft for foundation work.

[0002]

2. Description of the Related Art Conventionally, for example, on a deep foundation of a power transmission tower, a hollow driving unit is constructed underground. The operation of backfilling the remaining soil in the hollow part as a shaft formed in the ground is performed by storing the remaining soil in a sediment bucket and hanging it down with a crane. In this operation, one worker was required to remove the suspension band of the earth and sand bucket from the suspension hook of the crane.
It is necessary to place it in a well shaft. The inside of the shaft is narrow and there is not enough evacuation space. Therefore, there is a need for a new construction method that avoids danger and simplifies the work by omitting the arrangement of workers in the shaft.

[0003]

SUMMARY OF THE INVENTION Accordingly, the present invention relates to a novel hanging hook for a crane which can omit the arrangement of a worker in a vertical shaft in an operation of storing remaining soil in a sediment bucket and hanging it down to a low place by a crane. The challenge is to provide

[0004]

In the present invention, in order to solve the above-mentioned problems, a reversing rope R for a sediment bucket B is provided.
The hook body 2 is provided with a hook body 2, a trip lever 3 rotatably provided on the hook body 2, and an operation rope 4 for turning the trip lever 3 to a trip position. The lower hook 1 is constituted. The hook body 2 has a main rod 5 suspended at the upper end from a crane,
A hook 6 extending laterally from the lower end of the main rod 5 so as to form a substantially rectangular shape. The trip lever 3 is provided at its base end with a closing rod 8 and a tripping rod 9 which are pivotally supported by the main rod 5 of the hook body 2 and branch off from the base end in a substantially V-shape. The release lever 3 has its closing rod 8
However, the original position at which the opening between the hook 6 and the main rod 5 is closed, and the release rod 9 pulls the suspension band T from the hook 6,
Further, it is configured to be rotatable between a trip position in which the opening is closed. One end of an operation rope 4 that locks the trip lever 3 to the trip position by pulling from above is locked to the trip lever 3. A plunger knob 14 is provided on the trip lever 3 to control the relative rotation between the trip lever 3 and the hook body 2. The plunger knob 14 slidably and elastically presses the protruding tip against the side surface of the main rod 5 of the hook body 2, and from the side of the main rod 5 when the trip lever 3 reaches the trip position. It is configured such that it protrudes off, prevents return to its original position, and allows the tip to be retracted manually. After hanging the hanging band T of the sediment bucket B loaded with the residual soil or the like on the hook 6 and suspending the open portion of the hook 6 with the closing rod 8 to lower the sediment bucket B to the lower unloading position, Operation rope 4 from
To remove the suspension band T from the hook 6 by rotating the release lever 3 to the release position. By lifting the hook body 2 together with the reversing rope R, the earth and sand bucket B is reversed and unloaded.

[0005]

Embodiments of the present invention will be described with reference to the drawings. 1 is a front view of a hanging hook for a crane, FIG. 2 is a side view of the same, FIG. 3 is an enlarged cross-sectional view of a part of the hanging hook for a crane, and FIG. FIG. 5 is a front view of the hanging hook, and FIG. 5 is an explanatory view showing the procedure of backfilling a shaft using the hanging hook according to the present invention.

As shown in FIG. 5, a hanging hook 1 for a crane includes a hanging band T of a sediment bucket B and a reversing rope R.
And used to suspend earth and sand to the bottom of the shaft H.

1 to 4, reference numeral 2 denotes a hook body,
Reference numeral 3 denotes a release lever, and reference numeral 4 denotes an operation rope. The hook main body 2 includes a main rod 5 and a hook 6. The main rod 5 is suspended from the crane via a wire rope W at the upper end, and the reversing rope R of the earth and sand bucket B is locked at the lower end. The hook 6 extends laterally from the lower end of the main rod 5 so as to form a substantially rectangular shape. At the tip of the hook 6, the main rod 5
An engagement piece 7 protruding to the opposite side is provided. The engagement piece 7 has a flat engagement slope 7a that is inclined approximately 35 degrees with respect to the vertical in the suspended state.

The trip lever 3 is formed by assembling two identical component plates 3a at intervals with a bolt and a nut across the hook body 2, and bifurcated in a substantially V-shape from the base end. A branch rod (8) and a trip rod (9) are provided.
The trip lever 3 is pivotally supported at its base end by a main pin 5 of the hook body 2 with a pivot pin 10, and the closing rod 8 closes the opening between the hook 6 and the main rod 5. 1 (a state in FIG. 1) and a tripping position in which the tripping rod 9 detaches the hanging band T from the hook 6 and closes the opening (the state in FIG. 4). The trip lever 3 is prevented from rotating counterclockwise in FIG. 1 from its original position by a stopper 11 protruding from the main rod 5. An operation rope 4 for rotating the tripping lever 3 is locked to the tip of the closing rod 8 via a puller 12.

A plunger knob 14 is attached to the branch rod 13 extending laterally from the middle of the trip rod 9. The plunger knob 14 is provided to be vertically movable on the side surface of the main rod 5, and is urged so as to elastically press the protruding tip slidably against the side surface of the main rod 5. The tip of the plunger knob 14 is disengaged from the side surface of the main rod 5 and protrudes when the trip lever 3 reaches the trip position (FIG. 4), and prevents the trip lever 3 from returning to the original position. . If the tip of the plunger knob 14 is pulled in manually, the trip lever 3 can be returned to the original position.

A pull 12 for locking the operation rope 4 is fixed to a pivot pin 15 at a base end. Both ends of the pivot pin 15 are pivotally supported by distal ends of the closing rod 8. Pivot pin 1
An engaging piece 16 is provided at the center of the hook 5 to be engaged with or disengaged from the engaging piece 7 of the hook 6 depending on its rotation angle. The engagement piece 16 has a smooth engagement surface 16a that engages with the engagement slope 7a of the engagement piece 7. Accordingly, when the operating rope 4 is pulled, the engaging piece 16 rotates together with the puller 12 and the pivot pin 15, disengaging from the engaging piece 7, and the releasing direction of the releasing lever 3 (clockwise in the figure). ) Is allowed.

As shown in FIG. 5 (a), the hanging band T of the loaded sediment bucket B is hooked on the hook 6, and the opening portion of the hook 6 is closed with the closing rod 8 (FIG. 1). The bucket B is lowered to the unloading position at the bottom of the shaft H.

Thereafter, as shown in FIG. 5 (b), by pulling the operation rope 4 from the ground and turning the trip lever 3 to the trip position (FIG. 4), the suspension band T is pulled from the hook 6. remove. During this time, first, the pull rope 12 is pulled by the operation rope 4 and rotates together with the engagement piece 16, disengagement from the engagement piece 7, and rotation of the release lever 3 becomes possible. When the trip lever 3 has been rotated to the trip position (FIG. 4), the tip of the plunger knob 14 that has slid on the side surface of the main rod 5 comes off the side surface of the main rod 5 and protrudes. 3 is prevented from returning to its original position.

Next, as shown in FIG. 5 (c), by lifting the hook body 2 together with the reversing rope R, the earth and sand bucket B is reversed and unloaded.

[0014]

As described above, in the present invention, the hanging band T of the earth and sand bucket B loaded with the residual soil and the like is hung on the hook 6 and the closing rod 8 closes the open portion of the hook 6 so that the earth and sand are closed. After lowering the bucket B to the lower unloading position,
By pulling the operation rope 4 from above and turning the trip lever 3 to the trip position, the hanging strap T is hooked to the hook 6.
The earth and sand bucket B is inverted and unloaded by lifting the hook body 2 together with the inverting rope R. Therefore, there is no need to arrange a worker for removing the hanging band T of the earth and sand bucket B from the hanging hook 1 of the crane in the dangerous vertical shaft, and the operation can be streamlined.

[Brief description of the drawings]

FIG. 1 is a front view of a hanging hook for a crane.

FIG. 2 is a side view of a hanging hook for a crane.

FIG. 3 is an enlarged sectional view of a part of a hanging hook for a crane.

FIG. 4 is a front view of a hanging hook for a crane during an operation of removing a hanging band of an earth and sand bucket.

FIG. 5 is an explanatory view showing a procedure of backfilling a shaft using a hanging hook according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hanging hook 2 Hook main body 3 Tripping lever 4 Operation rope 5 Main rod 6 Hook 7 Engagement piece 8 Closing rod 9 Tripping rod 10 Pivot pin 11 Stopper 12 Puller 14 Plunger knob

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yasuhiko Murakami 6-5-19 Minamishinagawa, Shinagawa-ku, Tokyo F-term in Sanwa Tekki Co., Ltd. 3F004 CA01 CC04 CD09 DA02 DA07 EA35 LA08

Claims (2)

[Claims] 1. A hanging hook for a crane used for hanging a hanging band of a sediment bucket and a reversing rope and hanging down the earth and sand, comprising: a main rod suspended at an upper end by the crane; A hook body extending substantially sideways from the lower end of the main rod, and a hook body to which a reversing rope of the earth and sand bucket is locked; and a hook body at a base end portion. It is pivotally supported by the main rod, and comprises a closing rod and a tripping rod that bifurcate in a substantially V-shape from the base end, and the closing rod defines an opening between the hook of the hook body and the main rod. A trip lever configured to be rotatable between an original position to be closed and a trip position in which the trip rod detaches the hanging band from the hook and closes the opening; and One end is locked, from above An operation rope for turning the trip lever to the trip position by pulling, and a tip provided on the trip lever and having a constantly protruding tip slidably on the side surface of the main rod of the hook body. When the release lever reaches the release position, it comes off from the side of the main rod and protrudes, preventing the return to the original position,
And a plunger knob configured so that the tip can be retracted by manual operation.Hang the hanging band of the loaded earth and sand bucket on a hook,
After hanging the earth and sand bucket to the lower unloading position with the opening part of the hook closed with the closing rod, pull the operating rope from above and remove the lever, and rotate the lever to the pulling position to move the hanging strap from the hook. A hanging hook for a crane, characterized in that the earth and sand bucket is inverted by unloading and lifting a hook body to unload. 2. An engaging piece protruding from a tip of a hook of the hook body, and a pivot fixed to a tip of a closing rod of the trip lever for locking the operating rope. A pin is pivotally supported, and the pivot pin is provided with an engagement piece that engages with or disengages from the engagement piece of the hook depending on its rotation angle. When the operating rope is pulled, the puller, the pivot pin 2. The hook according to claim 1, wherein the engaging piece is rotated to disengage the hook from the engaging piece, and the turning lever is allowed to rotate in the pulling direction. 3. Hanging hooks for cranes.