JPS5815440B2 - construction crane - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a construction crane suitable for construction of houses and the like.

Various methods have been developed for moving cranes on foot, but most of them have complex mechanisms and are expensive.

In addition, changing the direction of a crane is difficult with the exception of self-propelled cranes such as truck cranes, and requires a tedious process of lifting the crane with another crane and changing its direction, or moving the crane from one position to another. Requires.

In recent housing development sites, there is a level difference between the road and the site, making it difficult for self-propelled cranes such as truck cranes to enter, and the narrow site makes it difficult to reach the planned location. Sometimes there isn't.

An object of the present invention is to provide a construction crane that can easily change direction, move on foot, and enter stepped terrain.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

Outrigger beams 21 to which outrigger jacks 22 are attached are installed at the four corners of the frame-shaped truck frame 26. A slide frame 17 is mounted on the truck frame 20 so as to be slidable in its longitudinal direction. There is.

A rotating frame 15 is provided on the upper side of the slide frame 17,
is rotatably supported via a swing bearing 16, and a rotation support frame 19 is coupled to the lower side via a swing bearing 25.

The slide frame 17 and the rotation support frame 19 are connected to each other by a center pin 23, a thrust bearing 24, and the like.

A hook bracket 26 that holds the outer side surface and lower end surface of the track frame 20 is attached to the outer end of the slide frame 17 by bolts 29.

The hook bracket 26 is made of an L-shaped welded structure and prevents the slide frame 17 from floating up.

A base end of a sliding cylinder 18 is connected to the portion of the track frame 20 on the outrigger beam 21 side by a pin, and a tip end of a rod of the sliding cylinder 18 is connected to the slide frame 17 by a pin.

A mast 7 is attached to the swing frame 15 by a foot pin 10 so as to be able to rise and fall freely,
, a rotating machine 14, a winding drum device 12, a undulating cylinder 9, etc. are installed.

The tip of the rod of the undulating cylinder 9 is connected to the upper part of the mast 7 by a pin.

A lower boom 4 is connected to the upper end of the support 7 by a pin so that it can swing, and an upper boom 2 is connected to the upper end of the lower boom 4 by a pin so that it can swing.

A lower cylinder 8 and a lower link 6 connected to the rod of the cylinder 8 are installed between the mast 7 and the lower boom 4, and an upper link 6 is installed between the lower boom 4 and the upper boom 2. A cylinder 5 and an upper link 3 connected to the rod of the cylinder 5 are installed.

The evening hoisting wire nip 11 that is extended from the hoisting drum device 12 is connected to the upper end of the upper boom 2 through a sheave attached to the mast 7, the lower boom 4, and the upper boom 2, and is connected to the upper end of the upper boom 2. is suspended.

Figure 1 shows the state of cargo handling work, in which the mast 1 is upright, the lower boom 4 and the upper boom 2 are raised, and the rotating support frame 19 and each outrigger jack 22 are in contact with the ground GL. The slide frame 17 is stacked on the upper end surface A of the truck frame 20, and is supported by the lower end surface portion C of the hook bracket 26 (see FIG. 3), which provides the overturning moment when a load is hung on the hook 1.

Figure 2 shows a state in which the luffing cylinder 9, lower cylinder 8, and upper cylinder 5 are all shortened, the mast 7 is laid down, and the lower boom and upper boom 2 are folded, and transportation is carried out in this state. be able to.

If the outrigger jack 22 is extended, the rotation support frame 19
The lower end surface of the rotary support frame 19 rises from the ground GL, and when shortened, the lower end surface of the rotation support frame 19 comes into contact with the ground.

In its grounded state, the entire weight of the crane is supported by the rotating support frame 19 through the swing bearing 25.

If the rotation support frame 19 is grounded and the outrigger jack 22 is lifted off the ground as shown in FIG. 6, the slide frame 17, track frame 20, etc. supported by the rotation bearing 25 can be manually rotated. .

When walking (as shown in Figures 3, 5, and 6), with the rotating support frame 19 in contact with the ground, the outrigger jacks 22 are shortened and lifted off the ground, and the sliding Activate cylinder 18.

Then, since the slide frame 17 is in a fixed state, the track frame 20 slides on the zero plane.

A represents the myith surface of the truck frame 20, and B
represents the sliding surface of the slide frame 17.

Next, when the outrigger jack 22 is extended and placed on the ground, the rotary support frame 19 is lifted off the ground as shown in FIG.

Therefore, by extending and contracting the sliding cylinder 18 (9), the slide frame 17, the swing frame 15, etc. move forward or backward.

The sliding surfaces at this time are the A side and the B side.

By repeating such operations, the aircraft can move forward and backward to reach the desired landing site or truck transport position.

If there is a step between the road and the site, a truck crane or crawler crane will need to perform civil engineering work such as creating a gradient in the approach route, but with the crane of this invention, it is possible to enter the step as follows. It can be performed.

7 and 8 show the crane of the present invention being transported on a road by a truck, with the outrigger jack 22 on the blade side being grounded on the ground at a higher level, and the lower part of the outrigger jack 22 on the other side being brought into contact with the ground. 2 shows a state in which the jack adding member 21 is connected with a pin and its lower end surface is grounded.

In this state, if the rotary support frame 19 is floated, the truck frame 20 can be moved and the crane can be left behind.

FIG. 9 shows a state in which the track frame 20 is arranged so that its longitudinal direction is perpendicular to the step, a support stand 28 is installed below the rotation support frame 19, and the outtrigger jack 22 is shortened. .

In this state, if the sliding cylinder 18 is shortened, the track frame 20 will slide to the left.

FIG. 10 shows a jack addition member 27 attached to the lower end of the right outrigger jack 22, and a track frame 2
0 is supported by the left outrigger jack 22, the right outrigger jack 22, and the jack addition member 27,
The receiver is shown with the stand 28 removed.

In this state, if the sliding cylinder 18 is extended, the slide frame 17 will move to the left.

When the slide frame 11 is moved to the left, the 11th
As shown in the figure, if a support stand 28 is installed below the rotation support frame 19 and the outrigger jack 22 is shortened, the support stand 28
8 supports the aircraft.

If the sliding cylinder 18 is shortened in this state, the truck frame 20 will slide to the left, climb over the step, and enter the site.

Figure 12 shows the outrigger jack 22 on the left and the outrigger jack 2 on the right with the jack additional member 27 attached.
The rotary support frame 19 is lifted up with 2 and the stand 28 is removed.

If the sliding cylinder 18 is extended in this state, the slide frame 17 will slide to the left.

FIG. 13 shows a state in which the truck frame 20 is further slid to the left in the same manner as described above, and FIG. 14 shows a state in which the slide frame 17 is further slid to the left in the same manner as described above to move the crane to a stepped ground. This shows the state in which the vehicle has been fully loaded.

In the above movement operation, according to the height of the step,
By adjusting the height of the platform 28 and jack addition member 27, the receiver can cross steps of any height to enter the premises.

Note that in FIGS. 9 to 14, the portion above the slide frame 17 is omitted.

As described above, according to the present invention, it is possible to easily change the position and direction of the crane at a work site, and it is also possible to smoothly move onto stepped ground using the self-cutter.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the construction crane according to the present invention in a cargo handling state, Fig. 2 is a side view showing the mast and boom of the crane in Fig. 1 in a folded state, and Figs. 3 and 4 are FIG. 5 is a plan view showing the slide frame and d-track frame of the construction crane according to this invention, and FIG. 6 is the same as that shown in FIG. 5. 7 is a plan view showing the construction crane according to the present invention driven by a truck and the outrigger jack is in contact with the ground; FIG. 8 is a side view of FIG. 7; FIGS. FIG. 14 is an explanatory side view for explaining the movement of the construction crane according to the present invention into a stepped area. 2... Upper boom, '4... Lower boom, 5... Upper cylinder, 7... Mast, 8... Lower cylinder, 9-...
・Luffing relay, 11... Hoisting wire rope, 12...
Winding drum device, 13...engine, 14...swivel machine, 15...
... Swivel frame, 16 ... Swivel bearing, 17 ... Slide frame, 18 ... Sliding cylinder, 19 ... Rotation support frame, 20 ... Track frame, 21 ... Outrigger beam, 22 ... Outrigger jack, 23 ...Center pin, 24...Thrust bearing, 25...Swivel bearing, 26...
Hook bracket, 27...Jacket joint leg member, 28
...Uke is a stand.

Claims (1)

[Claims] 1. A frame-shaped truck frame, an outrigger device installed at the four corners of the truck frame, a slide frame mounted on the truck frame so as to be slidable in the longitudinal direction thereof, and an upper side portion of the slide frame. A rotation support frame is connected to the lower side of the slide frame via a rotation bearing, one end is connected to the outrigger side portion of the truck frame, and the other is connected to the outrigger side portion of the truck frame. A construction crane characterized by comprising a sliding cylinder whose end is connected to a slide frame. 2. The construction crane according to claim 1, in which a prime mover, a swing machine, a mast, a hoisting device, etc. are installed on the swing frame. 3. The construction crane according to claim 1, wherein the slide frame and the rotation support frame are connected via a center pin and a thrust bearing. 4. The construction crane according to claim 1, wherein the slide frame is provided with a plurality of L-shaped hook brackets that hold the outer side surface and lower end surface of the truck frame.