JP2576755Y2 - Mobile crane equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile crane device such as a wheel crane and a truck crane.

[0002]

2. Description of the Related Art In general, a mobile crane device such as a wheel crane or a truck crane includes a crane base rotatably provided on a traveling vehicle body and a base end pivotally supported by the crane base. The crane boom is configured to be vertically driven by a derrick cylinder provided on a crane base. Further, this type of mobile crane device has a tip pulley at the tip of a crane boom, and a hook block suspended from the tip pulley via a wire rope is driven up and down by a winch provided on a crane base. Is configured.

[0003] The mobile crane device having such a configuration is as follows.
If the hook block is suspended from the tip of the crane boom, the hook block swings in the front-rear direction, which may hinder the running of the vehicle body. For this reason, when moving, the hook of the hook block is fixed to the locking portion provided on the vehicle body and the vehicle travels.However, in such a method, the operator gets down from the cab and moves the hook of the hook block to move the vehicle. There is a problem that the burden on the operator increases because the user has to lock the locking portion one by one.

Therefore, in order to solve such a problem, a hook block storing means is provided at the tip of the crane boom so as to be swingable, and when the wire rope is wound up by the winch, the hook block is swung to the tip of the crane boom. Japanese Utility Model Laid-Open Publication No. 3-89087 discloses a mobile crane device which is stored below a crane boom by freely provided hook block storage means.

[0005]

However, in the mobile crane apparatus described above, the hook block storing means for storing the hook block below the crane boom is attached to the pulley shaft of the tip pulley, so that the hook block is stored. When the means is removed from the crane boom to increase the height of the hook block, the pulley shaft of the tip pulley must be removed from the side plate of the crane boom, and it takes time to attach and remove the hook block storage means. was there.

The present invention has been made in view of such a problem, and a purpose thereof is to enable the hook block storage means to be easily detached from the crane boom, and to increase the lifting height of the hook block if necessary. It is an object of the present invention to provide a mobile crane device that can perform the above operations.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a mobile crane device according to the present invention comprises a crane base mounted on a traveling vehicle body, and a base end mounted on the crane base in a vertical direction. A crane boom pivotally supported and having a pair of left and right side plates at the tip, a derrick cylinder driving the crane boom up and down, and a tip pulley rotatably provided between the side plates;
A hook block suspended from the tip pulley via a wire rope so as to be able to ascend and descend, a winch provided on the crane base to wind up the wire rope, and a side plate swingable to the tip side of the tip pulley and the side plate. And a hook block storage means for storing the hook block under the crane boom when the wire rope is wound up by the winch.

[0008]

According to the present invention having such a structure, since the hook block storage means can be removed from the tip of the crane boom, the lift of the hook block can be easily increased as required.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

FIG. 5 is a view showing a schematic configuration of a mobile crane apparatus according to an embodiment of the present invention. In FIG. 5, reference numeral 11 denotes a crane base which is rotatably mounted on a traveling vehicle body. The crane base 11 is turned around a vertical axis by a hydraulic motor (not shown). The base end of the crane boom 14 is rotatable up and down via a connecting pin 13 on the upper surface thereof. A support post 12 for supporting is provided upright.

The crane boom 14 is formed by connecting a plurality of booms so as to be extendable and contractible. A derrick cylinder for raising and lowering the crane boom 14 from a falling state to a standing state is provided on a lower surface of a base end boom. Fifteen piston rods are connected.

On the other hand, a pair of left and right side plates 16, 16 are provided at the tip of the crane boom 14. As shown in FIG. 3, both ends of a pulley shaft 17 are supported by these side plates 16, 16.
Are provided with tip pulleys 18a and 18b rotatably. These tip pulleys 18a, 18b
The wire rope 20 from the winch 19 (see FIG. 4) provided on the wire rope 20 is rotatably supported. A hook block 21 is provided at the lower end of the wire rope 20.

The hook block 21 has a pair of left and right side plates 22, 22, as shown in FIG.
Hook block pulleys 24 a and 24 b are rotatably provided between pulleys 2 and 22 via pulley shaft 23. These hook block pulleys 24a and 24b have tip pulleys 18 respectively.
a, the wire rope 20 from 18b is wound,
When this wire rope 20 is wound up by the winch 19 provided on the support post 12, a hook block pulley 24
a and 24b move upward. In addition,
In the figure, reference numeral 25 denotes a hook.

[0014] Above the hook block 21, FIG.
A hook block storage device 27 is provided as shown in FIG. The hook block storage device 27 stores the hook block 21 below the crane boom 14 as shown in FIG. 2, and has a hook block storage bracket 28 as shown in FIG. As shown in FIG. 3, the hook block storage bracket 28 is formed by raising side plates 30, 30 from left and right ends of a plate 29, and an engagement portion 31 is provided at the center of the lower surface of the plate 29. . The engaging portion 31 has a pyramid shape and is adapted to engage with wedge-shaped receiving members 32a and 32b (see FIG. 4) attached to the side plates 22 and 22 of the hook block 21.

The hook block storage device 27
Is a pair of left and right support members 3 as shown in FIGS.
3,33. These support members 33, 33 connect the hook block storage bracket 28 to the tip pulley 18a,
The pivot shaft 18 is swingably supported on the distal end side of the crane boom 14 and is detachably supported on the side plates 16, 16 of the crane boom 14. As shown in FIG.
34. These support shafts 34, 34 are inserted through through holes 35, 35 formed in the side plates 30, 30 of the hook block storage bracket 28, and the bearing members 3 attached to the side plates 16, 16 of the crane boom 14.
The engagement members 3 are adapted to be fitted into the center holes of the support shafts 36, 36 and to engage with the retaining grooves 37, 37 formed on the peripheral surfaces of the distal ends of the support shafts 34, 34.
8, 38 are provided.

The support members 33 have operation plates 39. These operation plates 3
Reference numerals 9 and 39 denote engagement members 38 and 38 with the retaining grooves 37 and 37, respectively, by rotating the support shafts 34 and 34. The retaining shafts 37 and 37 are provided on the support shafts 34 and 34, respectively. 37
Notches 40, 40 are provided for releasing the engagement with the engagement members 38, 38.

The hook block storage device 27 has fixing screws 41, 41 for fixing the operation plates 39, 39 of the support members 33, 33 to the side plates 30, 30 of the hook block storage bracket 28.

In one embodiment of the present invention constructed as described above, after the fixing screws 41, 41 are removed from the hook block storage bracket 28, the operation plates 39, 39 of the support members 33, 33 are moved from the state of FIG. When rotated 180 degrees, as shown in FIG. 7, the notches 40, 40 provided at the tips of the support shafts 34, 34 move to the positions where the retaining members 38, 38 are provided, and the retaining grooves 37, 38 are provided. The engagement between 37 and engagement members 38, 38 is released. As a result, the support shafts 34, 34 of the support members 33, 33 are connected to the bearing members 35,
35 can be pulled out from the center hole of the support member 33,
By pulling out the support shafts 34, 34 from the center holes of the bearing members 35, 35, the hook block storage bracket 28 is connected to the side plates 16, of the crane boom 14.
16 can be easily removed.

Accordingly, in one embodiment of the present invention, the hook block storage bracket 28 can be easily removed from the side plates 16, 16 of the crane boom 14, and the hook block storage bracket 28 can be easily removed from the side plates 16, 16 of the crane boom 14. And the lift of the hook block 20 can be increased as required.

[0020]

As described above, according to the present invention, the hook block storing means for storing the hook block under the crane boom is swingable to the tip side of the tip pulley and detachable from the side plate of the crane boom. Since it is provided as possible, it is possible to provide a mobile crane capable of increasing the height of the hook block as required.

[Brief description of the drawings]

FIG. 1 is a side view showing a tip of a mobile crane according to an embodiment of the present invention.

FIG. 2 is a diagram showing a state in which the hook block shown in FIG. 1 is stored under a crane boom.

FIG. 3 is a front view showing a distal end portion of the crane boom shown in FIG.

FIG. 4 is a front view of the hook block shown in FIG. 1;

FIG. 5 is a schematic configuration diagram of a mobile crane according to an embodiment of the present invention.

FIG. 6 is a diagram showing a detailed structure of a portion A shown in FIG. 3;

FIG. 7 is a diagram showing a state in which the operation plate of the support member shown in FIG. 6 is rotated.

[Explanation of symbols]

 11 Crane base, 12 Support post, 14 Crane boom, 15 Derrick cylinder, 16 Side plate, 18a, 18b Tip pulley, 19 Winch, 20 Wire rope, 21 Hook block, 27 Hook Block storage device, 28: hook block storage bracket, 33, 33: support member.

Claims (1)

(57) [Scope of request for utility model registration] 1. A crane boom mounted on a traveling vehicle body, a crane boom having a pair of left and right side plates at a tip end pivotally supported on a base end of the crane base so as to be vertically rotatable. A derrick cylinder for vertically driving the crane boom up and down, a tip pulley rotatably provided between the side plates, a hook block suspended from the tip pulley via a wire rope so as to be vertically movable, A winch provided on the crane base for winding the wire rope, and a hook block provided on the tip side of the tip pulley so as to be swingable and detachable with respect to the side plate when the wire rope is wound by the winch. And a hook block storing means for storing the crane boom below the crane boom. Device.