JP2528718Y2 - Hook block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a hook block used for a mobile crane.

(Prior Art) This will be described with reference to FIGS.

The hook block A is used by being suspended from the tip of the boom 1 via a wire rope 2 so as to be able to be hoisted and lowered, and is rotated by a sheave shaft 5 bridged between the left and right side plates 4 (41, 42). A plurality of hook block pulleys 6 (61, 62) which are freely supported and are positioned near the left and right side plates 4 (41, 42) by spacers 8 are provided. A plurality of wire ropes 2 are used between the boom tip pulley 7 and the pulley.

By the way, this type of hook block A is composed of a wire rope 2 hung around the hook block pulley 6 (61, 62).
Is prevented from coming off from the pulley groove 6a.
, A wire rope stopper 9 is attached.

On the other hand, the mobile crane needs to replace the hook block A in accordance with the crane operation. However, the cable end of the wire rope 2 that suspends the hook block A is attached to the boom tip. Alternatively, since the cable end fitting 3 for fixing to the hook block is attached, the cable end fitting 3 must be removed when attaching and detaching the wire rope 2 from the hook block A, and the operation becomes complicated. There was a problem.

There is also a problem that the wire rope 2 is easily damaged by the detachment of the cable end fitting 3 every time the hook block A is replaced.

The present invention is intended to solve the above-mentioned problems of the prior art and to provide a hook block which does not require removal of the cable end fitting 3 when attaching and detaching the wire rope 2.

(Means for Solving the Problems) In order to achieve the above object, the hook block of the present invention is configured as follows.

When rotatably supporting the left and right hook block pulleys on a sheave shaft bridged between the left and right side plates of the hook block, the left and right hook block pulleys are used in proximity to the corresponding side plates, and the wires are separated from the corresponding side plates. A wire rope disengagement stopper is provided on the side plate so as to be movable in the axial direction of the sheave shaft between the rope repositioning position and the outer edge of the hook block pulley at the use position of the left and right hook block pulleys. A removable spacer for fixing the left and right hook block pulleys in the use position to the sheave shaft between the left and right hook block pulleys and externally fitted from a direction orthogonal to the axis of the sheave shaft. It is.

(Operation) According to the above configuration, when attaching and detaching the wire rope,
By removing the spacer and moving the left and right hook block pulleys to the wire rope replacement position separated from the corresponding side plate, the wire rope detaching stopper relatively disengages from the outer edges of these left and right hook block pulleys. The wire rope can be attached to and detached from the hook block while the cable end fitting is attached to the cable.

(Embodiment) Hereinafter, an embodiment of the hook block of the present invention will be described with reference to FIGS. 1 and 2. FIG.

Reference numerals 1 to 7 used and described in FIGS. 3 to 5 as conventional techniques are synonymous and will not be described again.

Reference numeral 10 is a wire rope stopper, 11 is a spacer, and 12 and 13 are pins. 14 is a connecting member, and B is a hook block.

The hook block B is rotatably supported by a sheave shaft 5 bridged between the left and right side plates 4 (41, 42) and is rotatably supported by a plurality of hook blocks positioned near the left and right side plates 4 (41, 42) by spacers 11. A pulley 6 (61, 62) is provided, and a plurality of wire ropes 2 are used between the hook block pulley 6 (61, 62) and the boom tip pulley 7 for use.

The connecting member 14 connects the side plates 41 and 42, and the wire rope coming-off stopper 10 is configured such that the wire rope 2 hung around the hook block pulley 6 (61, 62) has the hook block pulley 6 (6).
1, 62), only inside the side plate 4 (41, 42) close to the outer edge 6b of the pulley so as to restrict the hook block pulley 6 (61, 62) from coming off the pulley groove 6a. Installed. The spacer 11 is attached to the sheave shaft 5 between the left and right hook block pulleys 6 (61, 62).
, That is, in this embodiment, the hook block pulley 6 on the left and right hook blocks 6
(61, 62) is fixed at the use position I. The spacer 11 has a U-shaped end so that it can be removed, and is provided with a pin 12 for inserting the pin 12 and preventing the removal.

 Next, the operation will be described.

In the suspended load operation, the spacer 11 is rotatably supported by the sheave shaft 5 bridged between the left and right side plates 4 (41, 42) and is located at the use position I close to the left and right side plates 4 (41, 42). A plurality of wire ropes 2 are used between a plurality of fixed hook block pulleys 6 (61, 62) and a boom tip pulley 7 for use. The wire rope stopper 10 is attached to the outer edge of the pulley.
6b, the wire rope 2 hung around the hook block pulley 6 (61, 62) has the pulley groove 6a.
, And can be used in the same manner as the conventional hook block A.

When replacing the hook block B according to the crane operation, the pin 13 is removed, the pin 12 is removed from the spacer 11, and the spacer 11 is removed from the sheave shaft 5. Left and right hook block pulleys 6 (61, 6) configured to be movable on the sheave shaft 5
2) is moved from the use position I close to the side plate 4 (41, 42) to the position of the wire rope replacement position II separated from the side plate 4 (41, 42). The hook block pulley 6 (6
Since the outer edge 6b of (1, 62) does not have the wire rope coming-off stopper 10, the wire end fitting 3 is removed from the boom tip or the fixed portion of the hook block, and the wire rope 2 is removed from the pulley groove 6a.
The hook block B can be removed by appropriately passing the wire rope 2 around the sheave shaft 5 with the cable end fitting 3 attached to the cable end of the wire rope 2.

When installing the hook block B, pull out the pin 13 and the pin 12 from the spacer 11 and attach the spacer 11 to the sheave shaft 5.
Remove from The left and right hook block pulleys 6 (61, 62) configured to be movable on the sheave shaft 5 are connected to the side plates 4 (41, 42).
Is moved from the use position I near to the position of the wire rope replacement position II separated from the side plate 4 (41, 42). After appropriately passing the wire rope 2 around the sheave shaft 5 with the cable end fitting 3 attached to the cable end of the wire rope 2, the pulley groove 6a
And the hook block pulleys 6 (61, 62) on the left and right are moved to the use position I close to the side plate 4 (41, 42).
Go to When the spacer 11 is fitted over the sheave shaft 5 from above and the pin 12 is inserted into the spacer 11 and the pin 13 is inserted, the left and right hook block pulleys 6 (61, 62) can be fixed at the use position I. When the cable end fitting 3 is fixed to the boom tip or the fixing portion of the hook block, the hook block B can be used.

(Effect) Since the work of replacing the hook block can be performed without using a tool and with the wire end fitting attached to the wire end of the wire rope, no complicated work is required and the wire rope is not damaged. As a hook block for a mobile crane, it is highly effective in workability and safety.

[Brief description of the drawings]

1 and 2 show an embodiment of the hook block of the present invention. FIG. 1 is a front view, and FIG. 2 is a view taken in the direction of the arrow III in FIG. FIG. 3 is an external view of a boom and a hook block. 4 and 5 show a prior art hook block, FIG. 4 is a front view, and FIG. 5 is a view taken in the direction of arrow IV in FIG. 4 (41, 42): side plate, 5: sheave shaft, 6 (61, 62): hook block pulley, 10: wire rope stopper, 11: spacer, I: use position, II: wire rope replacement position.

Claims (1)

(57) [Scope of request for utility model registration] When the left and right hook block pulleys are rotatably supported on a sheave shaft bridged between the left and right side plates of the hook block, the left and right hook block pulleys correspond to a use position close to the corresponding side plate. A wire rope is configured to be movable in the axial direction of the sheave shaft between a wire rope replacement position separated from the side plate, and a wire is connected to the side plate so as to be close to an outer edge of the hook block pulley at a use position of the left and right hook block pulleys. A rope detaching stopper is provided, and a detachable spacer for fixing the left and right hook block pulleys at the use position is fitted to the sheave shaft between the left and right hook block pulleys in a direction perpendicular to the axis of the sheave shaft. A hook block characterized by being attached and configured.