JPH038304B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an outrigger for a truck crane or the like, and particularly to an outrigger for stably supporting the vehicle body of a large truck crane or the like capable of lifting loads of several tens of tons on the ground.

As such an outrigger, the applicant had previously applied for an invention described in Japanese Patent Application Laid-open No. 54-42719, but
A plurality of workers or one's own crane must be used to attach and detach the heavy ground plate to the telescopic support leg, which has the drawback of wasting time in attaching and detaching the ground plate. To avoid this, if you leave the ground plate attached to the lower end of the telescopic support leg so that the ground plate fits within the vehicle width when the outriggers are retracted, the maximum amount of outrigger extension will be reduced, so the extension beam will be However, if a multi-stage overhang beam is used, the number of overlapping parts of adjacent beams will increase during pasting, and the bending rigidity of each beam will have to be increased. Therefore, there is a risk of exceeding the vehicle weight limit set by traffic regulations.

The present invention addresses this problem by installing a guide member on the underside of the vehicle body frame and a hollow bracket extending laterally from the body frame to support the hollow beam so as to be able to extend horizontally laterally from the hollow bracket. At the tips of the hollow bracket and the guide member,
In an outrigger in which an opening or notch into which a vertical telescoping support leg supported at the tip of the hollow beam fits is provided so that the ground plate at the lower end of the telescoping support leg is housed within the vehicle width, a guide member 2 is provided at the tip of the hollow beam 1. A reduced-profile portion 1a is provided parallel to the guide member, and a short tube 4 that can be fitted into the guide member and is fixedly fixed through the telescopic support leg 3 is fitted outside the reduced-profile portion 1a in a telescopic manner, and In order to fit the ground plate of the telescopic support leg within the vehicle width, a cutout groove into which the telescopic support leg fits is provided in the reduced-profile portion 1a, and the extension limit of the short cylinder 4 relative to the hollow beam 1 is determined by the expansion and contraction of the telescopic support leg 3. Stopper means (12, 13) for regulating the axis so that it is located at or near the tip of the reduced-profile portion 1a
is provided between the hollow beam and the short tube.

An embodiment of the present invention will be described below with reference to the drawings.
Reference numeral 5 denotes a body frame of a truck crane. The front and rear of the body frame 5 are supported on the ground G via wheels (not shown), and the outriggers shown in FIGS. 1 and 2 are attached to the body frame 5 in front and behind the rear wheels, respectively. It is installed in the same way as a conventional truck crane. Each outrigger is a pair of horizontal hollow beams 1 arranged in opposite directions and perpendicular to the longitudinal axis of the vehicle body frame 5.
A pair of rectangular cylindrical guide members 2 are provided, which are arranged in front and in parallel, sharing a middle partition wall, so as to support the hollow beam 1 so as to be able to extend from side to side. Both integral guide members 2 have a top surface on the side where the hollow beam extends,
By rigidly welding and connecting the opposing side walls of the body frame 5 with a hollow bracket 6, the frame is in contact with and fixed to the lower surface of the body frame.
The tip of the hollow beam extending side of each guide member 2 or the tip of the hollow bracket 6 protrudes to the full width of the vehicle, but the tail end of the guide member 2 that protrudes to the opposite side from the vehicle body frame 5 at least covers its top plate and bottom plate. We are trying to reduce weight by removing it.

The hollow bracket 6 has an arm having an inverted U-shaped cross section, a flange 6a at the tip, a partition wall plate 6b in the middle, and a cylindrical body 6c.
The lower end opening is welded to the top plate of the guide member 2. The tip of the hollow bracket 6 has an opening 7 so that the vertical telescoping support leg 3 supported at the tip of the hollow beam 1 as described below can fit into the hollow bracket, and the tip of the guide member 2 on the side where the hollow beam extends. A notch 9 is formed in the top plate and bottom plate of the vehicle, respectively, so that the telescopic support leg 3 can be retracted into the hollow bracket 6 until the lower end ground plate 8 fits within the vehicle width.

A hollow beam 1 having a rectangular cross section that is slidably inserted into a guide member 2 is provided with a reduced-profile portion 1a parallel to the guide member 2 at its tip via a constricted portion 1b,
A short tube 4 having a rectangular cross section that can be fitted into the guide member is fitted in a telescopic manner on the outside of the reduced-profile portion 1a. The telescopic support leg 3 is a piston rod 1 of a double-acting hydraulic cylinder that vertically passes through a short cylinder 4b and a bottom plate 4c.
0 insertion end or lower end of the cylinder to the bottom plate 4 of the short tube 4
A ground plate 8 is attached to the lower end of the piston rod 10 so as to be tiltable.

The top plate and the bottom plate at the tip of the hollow beam 1 are each provided with a cutout groove 11 into which the telescopic support leg 3 can be fitted, and the reduced external portion 1a is formed into a fork shape, so that the hollow beam 1 can be used as a guide member as shown in FIG. 2, the tail end of the short tube 4 is engaged with the narrowed portion 1b so that the ground plate 8 can be accommodated within the vehicle width, and the claw 12 (attached to the tail end of the short tube 4) 4) and the stopper 13 protruding and fixed to the side wall of the hollow beam 1, the maximum amount of protrusion of the short tube 4 beyond the hollow beam 1 is controlled so that the axis 0-0 of the telescopic support leg 3 is at the tip of the hollow beam. Limit it to reach the vicinity. Therefore, the short tube 4 is slidable relative to the hollow beam 1 only between the position shown in FIG. 1 and the position shown in FIG.

Reference numerals 14 and 15 indicate double-acting hydraulic cylinders in which the cylinder parts are arranged vertically side by side and fixed together in opposite directions. Pivotally mounted and the other hydraulic cylinder 15
The tip of the piston rod 18 is pivotally connected to a beam 19 attached to the end of the guide member 2 opposite thereto. The hydraulic cylinders (14, 15) can also be one multistage hydraulic cylinder.

In the figure, 1c is a slide plate that is fixed to both sides of the top surface of the hollow beam 1 so as not to interfere with the top plate of the short tube 4, and 4a is a slide plate that is attached to the reduced-profile portion 1a or 4a between the top plate 4b and the bottom plate 4c at the tip of the short tube 4. A reinforcing end plate is shown that is fixedly connected to the fork-shaped portion so as not to interfere with it, and it is preferable that the short tube 4 has the rear end of its top plate 4b extended rearward from the bottom plate 4c.

Next, the operation of the present invention will be explained. When the hydraulic cylinders 14 and 15 are first extended from the retracted state shown in FIG. 1 in order to extend the outriggers on both sides, the sliding frictional resistance of the short tube 4 against the hollow beam 1 is smaller than the sliding frictional resistance of the hollow beam 1 against the guide member 2. Since this is normal, the tube 4 is shorter than the hollow beam 1.
is pushed out and the claw 12 and stopper 1 are pushed out as shown in Figure 5.
3 are engaged, the hollow beam is pushed out of the guide member 2. Therefore, when the hollow beam 1 is pushed out from the guide member to the intermediate extended position or the maximum extended position shown in FIG. Located at the tip.

For this reason, when each telescoping support leg 3 is extended and the vehicle body frame 5 is lifted from the ground G by the telescoping support leg as shown in Fig. 5, the weight of the truck crane and its suspended load acts on the telescoping support leg 3. The vertical load is directly transmitted from the tip of the hollow beam 1 supported by the guide member 2 in a cantilever manner to the telescopic support leg 3 via the bottom plate 4c of the short tube 4, thereby transmitting the bending moment between the hollow beam 1 and the short tube 4. At the same time, the short tube 4 prevents the perforated portion or fork-shaped portion of the notch groove 11 at the tip of the hollow beam 1 from expanding due to the vertical load. Therefore, the length of the overlapping portion of the hollow beam tip and the short tube 4 can be made extremely short, the strength and weight of the short tube 4 can be reduced, and the maximum amount of outrigger overhang to the side of the vehicle body frame can be reduced compared to the conventional feature. 1977
Compared to the case of the invention of No. 42719, the cylinder radius of the telescopic support leg 3 is increased, and the stable support of the vehicle body can be further improved.

Furthermore, when retracting the outriggers from the extended state shown in FIG. 4
is pulled into the hollow beam 1, and then the hollow beam 1 is pulled into the guide member 2 until the telescoping support leg fits into the notch groove 9, and the ground plate 8 of the telescoping support leg and the hollow beam 1 are connected to the guide member 2. The first part that does not protrude from the terminal
It is clear from the above explanation that the state shown in the figure is returned.

According to the present invention, by keeping the ground plate 8 attached to the telescopic support leg 3 at all times, it is possible not only to prevent the ground plate from protruding outside the vehicle width from the guide member 2 when the outriggers are stored. , the maximum amount of outrigger extension can be increased compared to the conventional type, and an increase in the weight of the outriggers can be suppressed to keep the vehicle weight within the limit range set by traffic regulations.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of one embodiment of the present invention in a stored state (X-X sectional view in FIG. 2), FIG. 2 is a plan view thereof, and FIGS. 3 and 4 are Y in FIG. 1, respectively. −
The Y sectional view, the Z-Z sectional view, and FIG. 5 are longitudinal sectional front views in the extended state. 5... Vehicle body frame, 6... Hollow bracket,
7... Opening, 8... Ground plate, 9... Notch groove, 10
... Piston rod, 11 ... Notch groove, 12 ...
Claw, 13... Stopper, 14, 15... Hydraulic cylinder.

Claims (1)

[Claims] 1. A guide member that supports the hollow beam so as to be able to extend horizontally laterally from the hollow bracket is attached to the lower side of the vehicle body frame and a hollow bracket that extends laterally from the body frame, and a guide member that supports the hollow beam so as to be able to extend laterally from the hollow bracket is installed, and a guide member that supports the hollow beam is installed at the tip of the hollow bracket and the guide member. , an outrigger in which an opening or a notch into which a vertical telescoping support leg supported at the tip of the hollow beam fits is provided so that the ground plate at the lower end of the telescoping support leg is housed within the width of the vehicle; 2, a short cylinder 4 which can be fitted into the guide member and which is fixedly fixed through the telescopic support leg 3 is fitted outside the reduced outline part 1a in a telescopic manner, In addition, in order to fit the ground plate of the telescopic support leg within the vehicle width, a cutout groove into which the telescopic support leg fits is provided in the reduced external portion 1a, and the hollow beam 1
A stopper means (1
2, 13) is provided between the hollow beam and the short tube.