JP2004352470A - Hook storage device for crane vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hook storage device capable of easily performing preparation for crane work by a main take-up hook 20, lowering a boom tip when traveling, and reducing boom front protrusion amount. <P>SOLUTION: This hook storage device is provided with a tip sheave 22 for main take-up arranged on one side between both side plates of a boom head 23 lower part, a tip sheave 25 for auxiliary take-up arranged on the other side between both side plates of the boom head lower part, a main take-up hook storage arm 26 supported 27 in a tip part of a boom head in the front of the tip sheave 22 for main take-up so as to swing, and an auxiliary take-up hook storage arm 28 supported in the tip part of the boom head in the front of the tip sheave 25 for auxiliary take-up so as to swing. When a crane vehicle travels, the main take-up hook 20 turns upward up to a main take-up hook storage position 20b below a boom for storage, and an auxiliary take-up hook 21 turns upward up to an auxiliary take-up hook storage position 21b which becomes a side of the main take-up hook storage position 20b for storage. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a hook storage device for a mobile crane having a main winding hook and an auxiliary winding hook.
[0002]
[Prior art]
BACKGROUND ART Conventionally, a hook storage device for a crane truck having a main winding hook and an auxiliary winding hook as shown in FIG. 5 is known (for example, see Patent Document 1).
[0003]
FIG. 5 shows a traveling posture in which the crane A has the boom 1 at its minimum size and has fallen most forward toward the front of the vehicle 5. The main winding hook 7 and the auxiliary winding hook 4 are stored by the hook storage device.
[0004]
The main winding hook 7 is stored by pivotally supporting the main winding hook storage arm 9 at the lower end of the boom tip 1a with a support shaft 8 so as to swing back and forth, and unwinding the main winding hook 7 by the main winding winch 11. In some cases, the main winding hook 7 can be stored along the lower surface of the boom together with the main winding hook storage arm 9.
[0005]
The auxiliary hook 4 is stored in an auxiliary winding sheave bracket 10 disposed at the front lower end of the boom tip 1a, and a support shaft located in front of the support shaft 8 of the main winding hook storage arm 9 is provided. The auxiliary winding hook 3 is pivotally supported by the auxiliary winding hook 2 so as to be able to swing back and forth, and when the auxiliary winding hook 4 is unwound by the auxiliary winding winch 12, the auxiliary winding hook 4 and the auxiliary winding hook storage arm 3 are main-wound. It can be stored at a position below and in front of the hook 7.
[0006]
[Patent Document 1]
JP-A-10-218567 (pages 4-6, FIGS. 7-8)
[0007]
[Problems to be solved by the invention]
However, the following problems have been pointed out in the hook storage device described in Patent Document 1.
(1) When a crane operation is to be performed with the main winding hook 7, the main winding hook in the retracted state is operated to be lowered and the main winding hook is swung forward together with the main winding hook storage arm 9 to take a hanging posture. The auxiliary hook 4 in the retracted state is an obstacle.
Therefore, it was necessary to always lower the winch of the auxiliary hook 4 once and to swing the auxiliary hook 4 together with the auxiliary hook storage arm 3 forward. Therefore, in order to perform the crane operation by the main winding hook 7, both the main winding hook 7 and the auxiliary winding hook 4 must be operated, and the preparation for the crane operation is troublesome.
(2) In the traveling posture of the crane truck A, since the auxiliary hook 4 in the retracted state is located below the main hook 7 in the retracted state, the height of the auxiliary hook 4 from the ground is more than a predetermined value. Then, the height of the boom tip 1a increases. That was an obstacle to improving the forward visibility during driving.
(3) Since the auxiliary sheave bracket 10 is disposed at the front lower end of the boom tip 1a, the auxiliary sheave bracket 10 projects further forward than the boom tip 1a by the dimension of the auxiliary sheave bracket 10. This is disadvantageous in reducing the amount of protrusion of the vehicle A in the forward direction of the boom.
[0008]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a hook storage device for a crane truck that solves the above-mentioned problems (1) to (3).
[0009]
[Means for Solving the Problems]
A hook storage device for a crane truck according to claim 1 of the present application includes a main winding tip sheave for suspending a main winding hook disposed on one side between the boom head lower side plates, and a boom head lower side plate between the boom head lower side plates. And the auxiliary winding hook sheave for suspending the auxiliary winding hook and the front end of the boom head in front of the main winding distal sheave are pivotally supported so as to be in contact with the lower end of the main winding hook. A main winding hook storage arm provided with a contact surface, and a supplementary surface provided with a contact surface pivotally supported at the front end of the boom head in front of the auxiliary winding tip sheave and having a lower end provided with the auxiliary winding hook. And a hook storage device including a wound hook storage arm.
[0010]
During traveling of the crane truck, the main winding hook comes into contact with the contact surface of the main winding hook storage arm, and is further pivoted upward to the main winding hook storage position below the boom by a further lifting movement of the main winding hook. The auxiliary hook is brought into contact with the abutment surface of the auxiliary hook storage arm, and is further moved below the boom by the hoisting movement of the auxiliary hook, and the side of the main winding hook storage position. And is stored by rotating upward to the auxiliary hook storage position.
[0011]
With this configuration, during traveling of the crane truck, the main winding hook and the auxiliary winding hook can be stored side by side in the boom width direction in the space defined by the boom head side plates at the hook storage position at the lower part of the boom tip.
[0012]
Further, in the hook storage device for a crane truck according to claim 2 of the present application, in addition to the configuration of the hook storage device for a crane truck of claim 1, the main winding hook storage arm is fixed to a main winding hook storage position. Main winding arm fixing means, and auxiliary winding arm fixing means for fixing the auxiliary winding hook storage arm at the auxiliary winding hook storage position, further comprising a wire drawn out from a winch and the main winding end sheave. After being wound around the main winding hook, it is connected to the auxiliary winding hook via the auxiliary winding end sheave.
[0013]
With this configuration, if the main winding hook storage arm is released from being fixed by the main winding arm fixing means, crane work can be performed using the main winding hook, and the auxiliary winding hook storage arm can be moved by the auxiliary winding arm fixing means. When the fixing is released, the crane operation using the auxiliary hook can be performed. Furthermore, according to this configuration, the crane operation using the main winding hook or the auxiliary winding hook can be selectively performed, even though only one winch is provided.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows a state in which a main winding hook 20 is stored in a main winding hook storing position and a auxiliary winding hook 21 is stored in an auxiliary winding hook storing position by a hook storing device of a crane truck according to an embodiment of the present invention. FIG. 2 is a view taken in the direction of the arrow A in FIG. 1, and is a view of the hook storage device as viewed from the front end of the boom.
[0015]
Reference numeral 22 denotes a main winding tip sheave for suspending a main winding hook disposed on the right side between lower side plates of the boom head 23. In the present embodiment, the sheave 22 is disposed so as to penetrate between both side plates of the boom head 23. Four sheaves are arranged and supported at equal intervals by the tip sheave pin 24.
[0016]
Reference numeral 25 denotes an auxiliary hoisting sheave for hanging an auxiliary hoist hook, which is disposed on the left side between the lower side plates of the boom head 23, and is coaxially arranged with the distal sheave pin 24.
[0017]
Reference numeral 26 denotes a main winding hook storage arm which is pivotally supported by a boom head tip 23a in front of the main winding tip sheave 22 and is provided with a contact surface 26a at its lower end with which the main winding hook 20 abuts. .
[0018]
Reference numeral 28 denotes an auxiliary hook storage arm, which is pivotally supported by a boom head distal end 23a in front of the auxiliary winding sheave 25 and has a contact surface 28a at its lower end with which the auxiliary hook 21 contacts. is there.
[0019]
During traveling of the crane truck, the main winding hook 20 comes into contact with the contact surface 26a of the main winding hook storage arm 26, and the main winding hook 20 is further lifted up to the main winding hook storage position 20b below the boom 29. It is turned upward and stored.
[0020]
The auxiliary hook 21 comes into contact with the contact surface 28a of the auxiliary hook storage arm 28, and is further moved below the boom 29 by the hoisting motion of the auxiliary hook 21 to the left of the main hook storage position 20b. And is stored by rotating upward to the auxiliary hook storage position 21b.
[0021]
As described above, when the crane truck travels, the main winding hook 20 and the auxiliary winding hook 21 are arranged in the boom width direction in the space defined by both side plates of the boom head 23 at the hook storage positions 20b and 21b at the lower end of the boom 29. Can be stored.
[0022]
In addition, the main winding hook 20 and the auxiliary winding hook 21 can be configured to be driven by a dedicated winch, respectively, but can also be configured to be selectively driven by one winch as described later. is there.
[0023]
FIG. 2 shows a state in which a wire 30 pulled out from one winch (not shown) is wound around the main winding tip sheaves 22, 22,... And the main winding hook 20, and then through the auxiliary winding tip sheave 25. The case where it is connected to the auxiliary winding hook 21 is shown.
[0024]
FIG. 3 shows that the main winding hook storage arm 26 can be fixed to the main winding hook storage position 20b by the main winding arm fixing means 31 with respect to the lower end portion 23a of the boom head. Similarly, FIG. 4 shows that the auxiliary hook storage arm 28 can be fixed to the auxiliary hook storage position 21b by the auxiliary arm fixing means 32 with respect to the lower end portion 23a of the boom head.
[0025]
The specific configuration of the main winding arm fixing means 31 and the auxiliary winding arm fixing means 32 is as follows. The main winding hook storing arm 26 and the auxiliary winding hook storing arm 28 are provided with fixing holes at appropriate positions, and the main winding hook storing position and the auxiliary winding Screw holes are provided in both side plates of the boom head 23 corresponding to the fixing holes at the hook storage positions, and fixing bolts are screwed into the screw holes through the fixing holes.
[0026]
According to the hook storage device having the above-described configuration, when the crane operation is to be performed by the auxiliary hoisting hook 21 as shown in FIG. 3, the auxiliary arm fixing means 32 is released to release the lower end of the boom head. The crane working posture in which only the auxiliary hook 21 is suspended can be achieved by releasing the fixing of the auxiliary hook storage arm 28 to the portion 23a and lowering the winch.
[0027]
When a crane operation is to be performed by the main winding hook 20 as shown in FIG. 4, the main winding arm fixing means 31 is released to fix the main winding hook storage arm 26 to the lower end 23a of the boom head. Is released and the winch is lowered, whereby the crane working posture in which only the main winding hook 20 is hung can be achieved.
[0028]
In this way, even if only one winch is provided, if the fixing of the main winding hook storage arm 26 by the main winding arm fixing means 31 is released, the crane operation by the main winding hook 20 can be performed. If the fixation of the auxiliary winding hook storage arm 28 by the auxiliary winding arm fixing means 32 is released, the crane operation by the auxiliary winding hook 21 can be performed.
[0029]
【The invention's effect】
In the hook storage device according to the first aspect of the present invention, when the crane truck travels, the main winding hook and the auxiliary winding hook are placed at the hook storage position at the lower end of the boom end within a space defined by the boom head side plates. Since the hooks can be stored side by side in the direction, all the problems of the conventional hook storage device can be solved. That is,
(1) When the crane work is to be performed by the main winding hook, the auxiliary hoist hook in the retracted state does not interfere with the crane operation. Preparation of work becomes easy.
(2) In the traveling posture of the crane truck, the auxiliary hook in the retracted state is located on the side of the main winding hook in the retracted state, so that the end of the boom can be lowered as compared with the related art, and the forward visibility during traveling is improved. be able to.
(3) The structure of disposing the auxiliary winding sheave bracket at the lower front part of the boom tip becomes unnecessary, and there is no one that protrudes further forward than the boom tip. This is advantageous.
[0030]
In the hook storage device according to the second aspect of the present invention, if the main winding hook storage arm is released from being fixed by the main winding arm fixing means, crane work can be performed using the main winding hook. If the fixing of the auxiliary hook storage arm by the arm fixing means is released, the crane operation by the auxiliary hook can be performed. That is, although only one winch is provided, there is no need to change the wire each time, and the crane operation using the main winding hook or the auxiliary winding hook can be easily selected and performed.
[Brief description of the drawings]
FIG. 1 is a hook storage device of a crane truck according to an embodiment of the present invention.
FIG. 2 is a view taken in the direction of arrow A in FIG. 1;
FIG. 3 is a view showing a state in which a main winding hook storage arm is fixed to a main winding hook storage position by main winding arm fixing means.
FIG. 4 is a view showing a state in which the auxiliary hook storing arm is fixed to the auxiliary hook storage position by auxiliary winding arm fixing means.
FIG. 5 shows a traveling posture of a crane truck equipped with a conventional hook storage device.
[Explanation of symbols]
20 is the main winding hook, 20b is the main winding hook storage position, 21 is the auxiliary winding hook, 21b is the auxiliary winding hook storage position, 22 is the main winding tip sheave, 23 is the boom head, 23a is the boom head tip, and 25 is A tip sheave for auxiliary winding, 26 is a main winding hook storage arm, 26a is a contact surface, 28 is a auxiliary winding hook storage arm, 28a is a contact surface, 29 is a boom, 30 is a wire, and 31 is a main winding arm fixing means. , 32 are means for fixing the auxiliary winding arm

Claims (2)

Main winding tip sheave for suspending the main winding hook disposed on one side between the boom head lower side plates, and auxiliary winding tip for suspending the auxiliary winding hook disposed on the other side between the boom head lower side plates. A main winding hook storage arm provided with a sheave and a contact surface pivotally supported at the front end of the boom head in front of the main winding tip sheave and having a lower end with which the main winding hook abuts; An auxiliary hook storage arm, which is pivotally supported at the front end of the boom head at the front of the distal sheave and is provided with a contact surface at the lower end of which the auxiliary hook contacts.
During traveling of the crane truck, the main winding hook comes into contact with the contact surface of the main winding hook storage arm, and the main winding hook is further rotated upward to the main winding hook storage position below the boom by the lifting movement of the main winding hook. At the same time, the auxiliary hook is brought into contact with the contact surface of the auxiliary hook storage arm, and is further moved below the boom by the hoisting movement of the additional auxiliary hook, so as to be lateral to the main winding hook storage position. A hook storage device for a crane truck, wherein the storage device is configured to be rotated upward to a storage position of an auxiliary hook and stored. 2. A hook storage device for a crane truck according to claim 1, wherein said main winding hook storage arm is fixed to said main winding hook storage position, and said auxiliary winding hook storage arm is fixed to said auxiliary winding hook storage position. Arm fixing means for auxiliary winding,
A hook storage device for a crane truck, wherein a wire fed from a winch is wrapped around the main winding tip sheave and the main winding hook, and then connected to the auxiliary winding hook via the auxiliary winding tip sheave.

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