JPH0510391U - Hook anti-skid device for vehicle-mounted crane - Google Patents

Abstract

(57) [Abstract] [Purpose] A vehicle with an on-vehicle crane that is not subject to a swing load from the hooks of the on-vehicle crane, and that securely locks and locks the hooks of the on-vehicle crane. And [Structure] A hook portion 1 capable of hooking a hook F of an on-vehicle crane C, and a connecting portion 2 attached to the hook portion 1 and connectable to a vehicle body of a vehicle T on which the on-vehicle crane C is mounted are provided. The connecting portion 2 is provided with at least two independent portions having an elastic expansion / contraction structure.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hook swing stop device for a vehicle-mounted crane. More specifically, the present invention relates to an improvement in safety of a device for preventing vibration of a hook of an on-vehicle crane mounted on a loading platform of a truck-type vehicle during traveling of the vehicle.

[0002]

[Prior Art]

 2. Description of the Related Art Conventionally, as a hook swinging device for an on-vehicle crane, for example, a wire rope is looped on two towing latches that are fixed in parallel at a front portion of a vehicle body (chassis, bumper, etc.) at regular intervals. It is known that it is fixed in a fixed shape.

This conventional on-vehicle crane hook swinging device is of a front retractable type in which the hook of the on-vehicle crane is stored in the front side of the vehicle. The hook of the on-vehicle crane hangs down on the front part of the vehicle body of the vehicle. The hook of the on-vehicle crane is tightened to the front part of the vehicle body via the wire rope by tensioning the wire rope and raising it. It prevents the vibration of the.

In such a conventional hook anti-swing device for a vehicle-mounted crane, the anti-swing load from the hook of the vehicle-mounted crane, which is running the vehicle, is applied to the tensioned wire rope. The hooks and wire ropes rub strongly, and the wire ropes easily become fatigued.Therefore, the wire ropes are cut and the hooks of the in-vehicle crane disengage and vibrate. There is a problem in safety, such as collision damage to the vehicle body or the bodies of other traveling vehicles. In addition, the vibration-damping load from the hooks of the on-vehicle crane while the vehicle is running is directly applied to the vehicle body of the vehicle via the tensioned wire rope, which causes various problems in various parts of the vehicle equipped with the on-vehicle crane. Has the problem of causing

[0005]

[Problems to be solved by the device]

 The present invention has been made in consideration of the above-mentioned problems, so that a vehicle equipped with an in-vehicle crane does not have a swing load from the hook of the in-vehicle crane, and the hook of the in-vehicle crane can be installed. An object of the present invention is to provide a highly safe hook anti-hook device for a vehicle-mounted crane that securely anti-swings.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, a hook swing device for a vehicle-mounted crane according to the present invention is a latch part capable of hooking a hook of the vehicle-mounted crane, and a vehicle mounted with the vehicle-mounted crane attached to the latch part. And a connecting part that can be connected to the vehicle body, and the connecting part is constituted by at least two independent parts having a compression and expansion structure.

[0007]

[Action]

 According to the above-mentioned means, the elastic expansion / contraction structure of the connecting portion can absorb the vibration damping load from the hook of the vehicle-mounted crane, and even if one connecting portion is cut or damaged, at least one other Since the hook of the vehicle-mounted crane can be held stationary by the connecting part of the vehicle-mounted crane, the vehicle does not receive the vibration-damping load from the hook of the vehicle-mounted crane. It is possible to solve the problem of providing a highly safe hook swaying device for a vehicle-mounted crane that securely holds and hooks a hook.

[0008]

【Example】

 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an on-vehicle crane hook sway device according to the present invention will be described with reference to the drawings.

In this embodiment, a vehicle-mounted crane having a front retractable type similar to the conventional example is shown.

As shown in FIG. 1, the vehicle-mounted crane C is rotatably mounted on a bed of a vehicle T including a truck, and a hook F suspended from the vehicle-mounted crane C is attached to a chassis of the vehicle T. It is designed so as to be swing-fastened to a tow latch R that is fixed and protrudes from the front bumper.

With respect to the hook F suspended from the vehicle-mounted crane C as described above, this embodiment has one latch portion 1 and two connecting portions as shown in detail in FIGS. 2 to 4. It consists of 2 and.

The latch part 1 is formed with a U-shaped hook 11 on which the hook F of the vehicle-mounted crane C can be hooked, and a U-shaped cross section, and both ends of the hook 11 are welded and fixed to the bottom of the U-shape. And the base 12.

The connecting portion 2 includes a cylindrical outer cylinder 21, a shaft bolt 22 inserted into the outer cylinder 21, and a coil spring 23 mounted between the outer cylinder 21 and the shaft bolt 22. .. A plug 24 having an insertion hole 24a in which the shaft bolt 22 can slide is screwed into one end of the outer cylinder 21 and is fixed by a knock pin 24b so as not to be fixed, and the other end is closed with a screw hole 25a. A plug 25 having a drainage hole 25b is welded and fixed to be closed. On the outside of one end of the outer cylinder 21, an eye nut 26 is welded and fixed to a screw groove 22a formed at the tip of the shaft bolt 22 protruding from the plug body 24 in addition to screwing, and on the outside of the other end, The eyebolt 27 is fixed to the screw hole 25a of the plug body 25 by welding in addition to screwing. A seat plate 28 is fitted to the head portion 22 b of the shaft bolt 22, and the coil spring 23 is elastically pressed between the seat plate 28 and the plug body 24. That is, this connecting portion has an elastic expansion / contraction structure in which the axial bolt 22 is retracted from the outer cylinder 21 against the elastic force of the coil spring 23.

The connecting portion 2 is rotatably attached to the base portion 12 of the latch portion 1 by the bolt 3 inserted into the eye nut 26, and two independent portions are symmetrically juxtaposed to the base portion 12. Installed. Further, the connecting portion 2 is capable of rotatably connecting the eyebolt 27 to the towing latch R of the vehicle T via the U-shaped connecting fitting 4.

According to such an embodiment, since the entire structure is simple and existing parts can be assembled and manufactured, the manufacture is easy, there are few failures, and maintenance is easy. In addition, the axial bolt 22 which is the main member of the elastic expansion and contraction structure is covered with the outer cylinder 21 to prevent rain wetting and the adhesion of soil and sand, and the drainage hole 25b is designed to discharge the invading rainwater and the like. Therefore, the function of the elastic expansion / contraction structure will not be deteriorated by rusting or clogging with sediment.

Further, when it is provided between the hook F of the on-vehicle crane C and the tow latch R of the vehicle T, the hook F of the on-vehicle crane C is mediated by a cushioning material due to the elastic expansion and contraction structure of the connecting portion 2. Since it looks like it is fixed to the vehicle body of the vehicle T by a swing, the swing load from the hook F of the vehicle-mounted crane C is absorbed and attenuated by the expansion and contraction of the elastic expansion / contraction structure of the connecting portion 2, and the vehicle T side. Is hardly transmitted to. Therefore, problems such as fatigue of each part of the vehicle T and loosening of the tightened part do not occur.

Further, with respect to the latch portion 1 and the connecting portion 2 as a whole, the elastic load expansion / contraction structure of the connecting portion 2 can cope with the vibration load from the hook F of the in-vehicle type crane C. Cutting damage cannot occur, and even if one connecting portion 2 is cut or damaged, at least one other connecting portion 2 can hold the hook F of the vehicle-mounted crane C in an anti-swing position. Therefore, the hook F of the vehicle-mounted crane C does not come off and vibrate to cause collision damage to the vehicle-mounted crane C itself, the vehicle body of the vehicle T equipped with the vehicle-mounted crane, or the vehicle bodies of other traveling vehicles, and the safety is extremely high. improves.

As described above, in addition to the illustrated embodiment, it is possible to provide an embodiment in which three or more connecting portions 2 are provided.

Further, an embodiment is possible in which the connecting portion 2 is connected to another portion of the vehicle body such as the bed of the vehicle T.

[0020]

[Effect of the device]

 As described above, since the hook vibration damping device of the vehicle-mounted crane according to the present invention can absorb the vibration damping load from the hook of the vehicle-mounted crane due to the elastic expansion / contraction structure of the connecting portion, the vehicle-mounted crane is mounted. This has the effect of preventing the vehicle from being loaded with vibrations from the hooks of the vehicle-mounted crane. Further, due to this effect, it is possible to prevent the occurrence of a defect in each part of the vehicle due to the vibration damping load. That is, since the load does not act directly on the chassis and bumper of the vehicle, it is possible to prevent damage to the chassis, bumper and boom of the crane.

Further, since the elastic load expansion / contraction structure of the connecting portion copes with the vibration damping load from the hook of the in-vehicle type crane, the cutting damage unlike the conventional example cannot occur. Even if the above is done, at least one other connecting part can hold the anti-vibration hook of the vehicle-mounted crane, so that the hook of the vehicle-mounted crane can be reliably anti-vibrated and fixed. .. Also, due to this effect, collision damage or the like due to unexpected detachment of the hook of the vehicle-mounted crane is prevented and safety is improved.

[Brief description of drawings]

FIG. 1 is a perspective view of an on-vehicle crane according to an embodiment of the present invention in an installed state, showing an embodiment of a hook swaying device.

FIG. 2 is an enlarged view of a main part of FIG.

3 is an operation state diagram of FIG. 2. FIG.

FIG. 4 is a central longitudinal sectional view of FIG.

[Explanation of symbols]

 1 Hook part 2 Connection part C Car-mounted crane F Hook T Vehicle

Claims (1)

[Claims for utility model registration] [Claim 1] A latching part capable of hooking a hook of an on-vehicle crane, and a connecting part attached to the latching part and capable of being connected to a vehicle body of a vehicle equipped with the on-vehicle crane. And a hook swing-off device for a vehicle-mounted crane, which is configured by at least two independent connecting portions having a compression and expansion structure.