JPS6121506Y2 - - Google Patents

Description

[Detailed description of the invention] When loading a truck crane onto a ship, it is necessary to suspend the truck crane using a marine crane, a wharf crane, or another large crane. This invention relates to a suspension fitting for a truck crane having a telescoping boom, and particularly relates to a suspension fitting provided at the base end of the telescoping boom.

As shown in Fig. 1, the truck crane has a boom inner box on the tip side telescopically inserted into the boom outer box, and a boom telescoping hydraulic cylinder for telescopically driving the boom inner box with respect to the boom outer box. The proximal end of the boom outer box of the telescopic beam B equipped with
It is constructed by being attached to a swivel base C rotatably mounted on a vehicle so that it can be driven up and down.

For this type of truck crane, lifting fittings are provided on the base end of the telescopic boom B (base end of the outer boom) and on the left and right outrigger parts A located in front of the vehicle, and these parts are attached to wires. It is suspended via a rope.

By the way, the suspension fitting provided at the base end of the telescopic boom B (the base end of the boom outer box) has conventionally been configured as follows. That is, the base ends of a pair of left and right locking devices each having a hole for locking a wire rope at their tips are welded and fixed to the left and right side walls of the base end (base end of the boom outer box) of the telescopic boom B, and the boom is suspended. It was used as a holding tool.

However, if the suspension fittings provided at the base end of the telescopic boom B (the base end of the boom outer cylinder) are configured as described above, ), it is necessary to reinforce the welded part of the hanging metal fittings, and the welding work is complicated.

The present invention is intended to solve the above-mentioned drawbacks of the prior art, and particularly for this type of truck crane, it is necessary to The connection to the boom outer box is made by a connecting pin that penetrates the left and right side walls of the boom outer box like a bridge, and this connecting pin has sufficient supporting force to support the expansion and contraction reaction force of the boom expansion and contraction hydraulic cylinder. Focusing on the fact that the connecting pins are supported on the left and right side walls of the base end of the boom outer box, the outer ends of the connecting pins are made to protrude outward from the left and right side walls of the boom outer box, and the connecting pins are supported on the left and right protruding parts of the boom outer box. A hanging metal fitting is constructed by disposing a pair of left and right locking devices, each of which is pivoted at its base end and has a hole for locking a wire rope at its distal end.

According to the above configuration, the locking device is attached to the existing connecting pin which has sufficient supporting force and is present at the base end of the telescopic boom B (the base end of the boom outer box), and is thereby suspended. Since it constitutes a holding fitting, it eliminates the above-mentioned drawbacks of conventional lifting fittings, does not require reinforcement of the base end of the telescopic boom B (base end of the boom outer box), and does not require welding work. Therefore, it is possible to obtain a hanging metal fitting that does not require the use of other materials.

Embodiments of the suspension fitting for a truck crane according to the present invention will be described below with reference to FIGS. 2 and 3. As mentioned above, the present invention relates to a suspension fitting for a truck crane, particularly to a suspension fitting provided at the base end of the telescopic boom B (the base end of the outer boom). Therefore, FIG. 2 only shows the proximal end of the telescoping boom, ie, the proximal end of the boom outer box 3. In FIGS. 2 and 3, 2 indicates a telescopic drive for the telescopic boom B, that is, a boom outer box 3;
A boom telescoping hydraulic cylinder for telescopically driving the boom inner box telescopically inserted into the boom outer box 3, and installed between the base end of the boom outer box 3 and the boom inner box (not shown) at an appropriate location. The interior is arranged. The hydraulic cylinder for extending and retracting the boom is connected to the base end of the boom outer box 3, as shown in FIG. 3, by connecting the left and right side walls of the boom outer box 3 with connecting pins 1 that pass through the boom outer box 3 in a bridge-like manner. The connecting pin 1 has its outer ends protruding outward from the left and right side walls of the boom outer box 3, and its base end is pivoted to each of the protrusions, and its tip end is used for locking a wire rope. A pair of left and right locking tools 4 having holes 9 are provided. A pair of left locking tools 4 arranged on the left and right protrusions of the connecting pin 1,
This constitutes the hanging metal fitting of the present invention. In the figure, 5 is a spacer, and 6 is a holding plate for preventing the locking tool 4 fitted into the end of the connecting pin 1 from falling off, which is fixed to the end surface of the connecting pin 1 with a bolt 7. There is. 8 is a member fixed to the side plate of the boom outer box 3, and by fixing the locking tool 4 to the member 8 through a bolt 9, the locking tool 4 is prevented from rotating around the connecting pin 1. It is intended to prevent In addition, in FIG. 3, a connecting device provided at the end of the wire rope for hanging is shown in phantom lines, and this connecting device is made by inserting a pin 12 into a hole 10 provided at the tip of the above-mentioned locking device 4. By inserting it, it is fixed to the locking tool 4. Reference numeral 11 denotes a fulcrum pin that connects the base end of the telescopic boom B to the swivel base C in a freely erectable manner.

According to the suspension fitting consisting of the pair of left and right locking devices 4 configured in this way, the lifting force is directly transmitted to the connecting pin 1 when the truck crane is lifted, and this connecting pin 1 is also able to move against the expansion and contraction of the telescoping cylinder 2. Because it has sufficient support capacity to hold power,
There is no need to reinforce the base end of the boom outer box 3 when attaching the hanging bracket, and no welding work is required.

The truck crane suspension fitting of the present invention, which is constructed and operates as described above, does not require reinforcement or welding work at the base end of the boom outer box, compared to conventional lifting fittings. It has the excellent effect of being able to be attached to.

[Brief explanation of the drawing]

Figure 1 is a side view of a truck crane in a suspended state equipped with a conventional suspension fitting, Figures 2 and 3 are
The figures show an embodiment of the suspension fitting for a truck crane according to the present invention. Figure 2 is a side view of the base end of the telescopic boom (base end of the outer boom), and Figure 3 is the same as that of Figure 2. It is an explanatory view of the HH cross section. B: Telescopic boom, C: Swivel base, 3: Boom outer box, 2: Hydraulic cylinder for boom extension and contraction, 1: Connecting pin, 4: Locking tool.

Claims (1)

[Scope of utility model registration request] The boom inner box on the tip side is telescopically inserted into the boom outer box, and a boom telescoping hydraulic cylinder is installed between the base end of the boom outer box and the boom inner box to extend and retract the boom inner box with respect to the boom outer box. A telescoping boom that is internally arranged between appropriate locations, especially a telescoping boom that connects the base end of the boom outer box and the boom telescoping hydraulic cylinder with a connecting pin that penetrates the left and right side walls of the boom outer box like a bridge. This is a suspension fitting for a truck crane, in which the outer boom base end of the telescoping boom is attached to a swivel base rotatably mounted on a vehicle so as to be capable of raising and lowering the base end of the boom outer box. The outer ends of the connecting pins connecting the boom extension and contraction hydraulic cylinder are made to protrude outward from the left and right side walls of the boom outer box, and the proximal ends of the connecting pins are pivotally supported by the left and right protruding parts of the connecting pins, respectively. A suspension fitting for a truck crane, characterized in that a pair of left and right locking devices each having a hole for locking a wire rope is provided at the tip thereof.