JPH0235019Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a small hydraulic crane mounted on a truck, etc., and in particular, an outrigger device for a small hydraulic crane mounted on the floor of the loading platform of a small truck. It is related to.

(Prior art) As described in Japanese Utility Model Publication No. 53-35301, a conventional outrigger device for cranes is a system in which a telescopic column and a telescopic leg are arranged side by side, and the column and the leg are linked. By selectively activating or inactivating this link, the legs are extended below one side of the loading platform in an inclined position, or the legs are extended below the loading platform in an upright position. Something is known.

(Problem to be solved by the invention) However, when the outrigger device described in the above-mentioned publication is extended in an upright position, the legs and struts descend to the ground in parallel, so In a normal truck where the truck frame is equipped with a battery, etc., there is a problem that the battery cannot be used because the battery gets in the way and interferes with the support column, and the problem that the pivot pin needs to be replaced is a problem. Yes, also
When extending in a tilted position, the legs are configured to gradually tilt from the vertically retracted state, so the movable part of the outrigger is located below the loading platform, such as in a crane mounted on the loading platform of a small truck. In particular, when the side tilt of the cargo bed is lowered and the operator's view is obstructed, it is necessary to check at the beginning of the extension operation whether the outrigger is extended to the outward tilted position. There was a problem that I couldn't do it.

Furthermore, in the outrigger device described in the above publication, the cylinder alone is an outrigger and has a structure that extends to the sides, so not only the cylinder but also the piston rod must have sufficient rigidity to withstand bending moment. As a result, there is a problem that the weight increases.

(Means for Solving the Problems) The present invention was devised in view of the above-mentioned problems.As shown in FIG. A cylinder 4, an outrigger inner cylinder 6 which is slidably inserted into the outrigger outer cylinder and has a float 9 at the lower end, a cylinder device 7 which is inserted between the outrigger outer cylinder and the outrigger inner cylinder, and a crane base. A hollow vertical guide 10 fixedly opened at the outer end of the vertical guide, a weight block 11 guided so as to be able to rise and fall within this vertical guide, and a state in which the weight block is completely fitted into the vertical guide. The weight block is provided with latching means 12, 13, 14 for holding the weight block in the raised position, and a link 16 interposed between the lower end of the weight block and the lower end of the outrigger outer cylinder. It is characterized in that the outrigger outer cylinder is in a vertical position when the weight block is in the raised position within the vertical guide, and the outrigger outer cylinder is in an inclined position when the weight block is in the lowered position within the vertical guide.

(Function) In the outrigger device configured as described above, when the weight block 11 is held in the raised position by the latching means 12, the outrigger outer cylinder is held vertically by the link 16 as shown in FIG. Therefore, by extending the cylinder device 7 in this state, the outrigger inner cylinder is extended vertically downward as shown in FIG.
On the other hand, as shown in FIG. 2, by releasing the locking means 12, the weight block 11 is lowered by its weight, whereby the outrigger outer cylinder 4 is tilted laterally from the vertical position via the link 16.
Therefore, by extending the cylinder device 17 in this state, the outrigger inner cylinder is extended laterally and downwardly while maintaining the inclined position from the beginning.

According to the present invention, simply by locking or releasing the locking means for holding the weight block in the raised position, the outrigger inner cylinder can be extended in an upright position below the machine base, and can be extended laterally and downwardly. The weight block can be switched to a tilted position, which is not only easy to operate and has little risk of malfunction, but also allows you to confirm from the beginning whether the weight block is tilted to the side or downward. The required function can be sufficiently secured with a small amount that is not hindered by the presence of obstacles.

(Embodiment) The drawing shows an example in which an outrigger device 1 according to the present invention is attached to both ends of a crane base 3 of a small hydraulic crane 2 mounted on a truck.

In the figure, reference numeral 4 denotes an outrigger outer cylinder whose upper end 4a is pivotally attached to a bracket 3a protruding from one end of the crane base 3 using a pivot pin 5 so as to be rotatable in the extending direction. A tube 6 is slidably fitted therein and configured to be extendable and retractable via a hydraulic cylinder device 7. Further, a grounding float 9 is pivotally attached to the lower end 6a of the outrigger inner cylinder 6 by a pin 8 so as to be rotatable in the same direction as the outrigger outer cylinder 4.

In the illustrated example, a vertical guide 10 is provided at the end of the crane base 3, and a weight block 11 is provided in the vertical guide 10 so as to be vertically movable through its lower end opening 10a. A removable latching pin 12 serves as a latching means for holding the vertical guide 10 and the weight block 11 in the first illustrated raised position within the vertical guide 10 and the weight block 11.
The weight block 11 is inserted into the through pin holes 13 and 14 of the vertical guide 10, thereby holding the weight block 11 at a raised position within the vertical guide 10. In this raised position, the lower end 11a of the weight block protrudes downward from the lower end opening 10a of the vertical guide 10. and the protruding ears 15 protruding outward from the lower end 4b of the outrigger outer cylinder 4, which is vertically suspended by the pivot pin 5, are connected by the link 16 and the pins 17, 18, thereby connecting the second As shown in the figure, by removing the removable locking pin 12 from the pin holes 13 and 14, the weight block 11 is vertically lowered into the vertical guide 10, and is connected to the lower end 4b of the outrigger outer cylinder 4 by the link 16. The outrigger outer cylinder 4 is tilted outward by pushing the outrigger outer cylinder 4 outward.

In the illustrated example, the lower end 4 of the outrigger outer cylinder 4
A stopper 19 projects laterally from the inner outer wall at b.
When the weight block 11 is lowered, the link 16 engages with the stopper 19 to determine the lowered position of the weight block 11, and therefore the lateral inclined extension position, and the upper end 11 of the weight block 11 is determined.
b is prevented from slipping out of the vertical guide 10. However, the upper end 11 of the weight block 11
It is also possible to provide an appropriate engaging portion between the vertical guide 10 and the lower end opening 10a of the vertical guide 10 to perform the above-mentioned positioning and prevention of slippage.

In the illustrated example, the locking plate 20 is fixed to the lower end 6a of the outrigger inner cylinder 6, the cam-shaped locking lug 21 is provided on the link 16 near the connecting pin 18, and when the outrigger inner cylinder 6 is in the contracted position, A cam-shaped latch tab 21 is engaged with the latch plate 20. As a result, even if the locking pin 12 is pulled out from the pin holes 13 and 14, the hydraulic cylinder device 7 is activated to extend, the outrigger inner cylinder 6 is slightly expanded, and the locking plate 20 and the locking lug are disengaged. Until then, the weight block 11 is held so that it does not fall under its own weight.

In addition, by appropriately selecting the outer circumferential shape of the above-mentioned cam-shaped latching protrusion 21, the hydraulic cylinder device 7 is contracted from the outwardly inclined extended state, and the latching plate 20 at the lower end of the outrigger inner cylinder 6 is shaped like a cam. The weight block 11 is configured to be able to apply an appropriate upward force to the weight block 11 when it is engaged with the hooking lug 21.

FIG. 6 shows another embodiment of the present invention. In this embodiment, an outrigger device 1 having the above-described structure according to the present invention is attached to one end of a horizontal outrigger 25 provided on the crane base 3 so as to be able to extend horizontally to the side. An example is shown in which the is installed. In the figure, the same parts as in the example described above are denoted by the same reference numerals.

FIG. 7 shows another embodiment, in which the outrigger outer cylinder and inner cylinder are omitted, and the upper end 26a of the cylinder tube 26 of the hydraulic cylinder device 7 is
is pivotally connected to the bracket 3a at one end of the crane base 3 by the pivot pin 5, and the other end of the link 16, whose one end is connected to the lower end 11a of the weight block 11 by the pin 17, is connected to the lower end 2 of the cylinder tube 26.
6b by a connecting pin 18, a retaining plate 20 is fixedly provided to the lower end of the piston rod 27, and a float 9 is rotatably connected to the lower end of the piston rod 27. The lower end 28a of the external damage prevention guard plate 28 of the piston rod 27 is integrally connected to the retaining plate 20, and the upper end 28b of the guard plate 28 is slidably supported on the outer wall of the cylinder tube 26 via a sliding pad 29. There is. Since the operation of the outrigger device according to this example is substantially the same as that of the outrigger device shown in FIG. 1, a detailed explanation thereof will be omitted.

(Effects of the invention) According to the invention, the weight block can be switched between an upright position and an inclined position by simply engaging or releasing the latching means for holding the weight block in the raised position. When extending the outrigger in an extended position, it is possible to confirm the tilted position almost from the beginning of the straightening operation of the outrigger.

Also, when extending the outriggers to an inclined position,
The weight block only needs to be lowered to a position where the link 16 is almost horizontal, so the battery 30 attached to the chassis 29 at the bottom of the vehicle
(See the right part of FIG. 1) etc., and the effect that no interference occurs can be obtained.

[Brief explanation of the drawing]

Figure 1 is a front view showing the outrigger device according to the present invention installed on a crane base, and Figure 2 is a front view showing the outrigger device according to the present invention installed on a crane base.
FIG. 3 is an explanatory diagram of the outrigger operation in an upright position of the outrigger device shown in FIG. 1, and FIG.
The figure is a longitudinal sectional view of the outrigger outer cylinder and the inner cylinder, Figure 5 is a sectional view taken along the - line in Figure 3 in the direction of the arrow, and Figures 6 and 7 are other embodiments of the present invention. FIG. DESCRIPTION OF SYMBOLS 1... Outrigger device, 2... Crane, 3... Crane base, 4... Outrigger outer cylinder, 5... Pivotal pin, 6... Outrigger inner cylinder, 7... Hydraulic cylinder device, 8... Pivot pin, 9... Float, 10... Vertical guide, 11... Weight block, 12... Latching pin, 13, 14... Pin hole, 15... Lug, 16... Link, 17, 18... Connection pin, 19... Stopper, 20... Latching plate, 21... Cam shaped hooked ears.

Claims (1)

[Scope of utility model registration request] an outrigger outer cylinder 4 whose upper end is rotatably pivoted to the outer end of the crane base 3; an outrigger inner cylinder 6 which is slidably fitted into the outrigger outer cylinder and has a float 9 at its lower end; A cylinder device 7 inserted between the cylinder and the outrigger inner cylinder, a hollow vertical guide 10 fixed to the outer end of the crane base with an opening at the bottom, and a weight guided so as to be freely raised and lowered within this vertical guide. Block 1
1, and latching means 12, 13, 1 for holding the weight block in the raised position with the weight block fully seated in the vertical guide.
4 and a link 16 interposed between the lower end of the weight block and the lower end of the outrigger outer cylinder, the outrigger outer cylinder is in a vertical position when the weight block is in the raised position within the vertical guide. An outrigger device characterized in that the outrigger outer cylinder is configured to take an inclined position when the weight block is in the lowered position within the vertical guide.