JPS5863555A - Outrigger device of wheeled work machine - Google Patents

Abstract

PURPOSE:To decrease an upward protrusive amount of a jack cylinder, by swingably mounting the jack cylinder of an outrigger device to the point end of an overhung beam, internally moving and storing said cylinder in the overhung beam. CONSTITUTION:A jack cylinder 5 is pivotally mounted in a laterally swingable state by a swinging cylinder 7 to the point end part of an overhung beam 3 slidably fitted to a fixed box 2. While blocks 31, 32 are secured to the point end part of the beam 3, and a high located part 55a of a protruded part 55, protrusively provided in the jack cylinder 5, is engaged to an engaged hollow part 33, formed between the blocks 31, 32, when the cylinder is extended in a vertical attitude. Further a lock pin 8 is provided in the point ene of the beam through a spring 81. The pin 8 is protruded internally of the beam 3 and adapted to a low located part of the protruded part 55 at a vertically contracted attitude of the jack 5 when a top part 82 of the pin is slided on a cam surface 91 of a cam 9.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an outrigger device installed in a wheel-type working machine such as a truck crane, a rough terrain crane, or a wheel seal.

As shown in Figures 8 to 10, the Jinnotane outrigger devices are installed in two sets on the front and back sides of the traveling body A, each on the left and right, in an H-shaped arrangement as a whole, each with a fixed box fixed to the traveling body A. An overhanging beam C is extended out and retractably fitted, and a retractable jack cylinder E having a float D at the lower end is fixed in a vertical position at the tip of the overhanging beam C.

However, this type of conventional outrigger device has the following problems. In other words, this plum-wheeled working machine is subject to various restrictions on the body structure due to the fact that it runs on public roads.The height of the underside of the body from the ground (hereinafter referred to as body height) is one of them. Therefore, the jack cylinder E of the outrigger device requires an extension stroke that is the above-mentioned height of the aircraft plus a stroke for lifting the aircraft off the ground. For this reason, the jack cylinder E
However, the overall length of the fuselage is longer, and the longer it is, the more it protrudes upward from the fuselage. In this way, the jack cylinder protrudes from the top of the machine for a long time, so the jack cylinder gets in the way during so-called close work, such as loading a truck close to a pile driving machine, and is very inconvenient for work. It had become.

In addition, in order to increase the stability of the aircraft support, it is desirable that the overhang beam C extends as far as possible to the outside of the fuselage.For this reason, it is necessary to make sure that the jack cylinder E fits fully within the legal aircraft width when the overhang beam is retracted. However, if this is done, the outer half of the flow cylinder D attached to the lower end of the cylinder E will protrude from within the width of the machine body.

Therefore, conventionally, the float D was removed every time the vehicle was driven on a public road, and this work of attaching and detaching the float was extremely troublesome. Furthermore, due to the necessity of attaching and detaching the float, the float D has to be made small in order to keep the weight of the float small, which is disadvantageous in terms of the stability of supporting the aircraft body.

In view of the above points, the present invention is capable of suppressing the amount of upward protrusion of the jack cylinder into the machine body while adhering to legal restrictions, and also allows the float to be kept within the width of the machine body in the retracted state. The purpose of this invention is to obtain an outrigger device for a wheel-type working machine, and its configuration is as follows.

The present invention has a structure in which a jack cylinder is pivotally attached to the tip of an overhang beam so as to be able to swing in the left and right directions using the upper part as a fulcrum, and the cylinder is pulled toward the inside of the overhang beam by a swing cylinder so that it can be stored in an inclined position. It is characterized by the following structure.

Embodiments of the present invention will be described below with reference to the drawings.

1 is a traveling body frame, 2 is a fixed box fixed to the frame 1, 3 is an overhanging beam that extends over the fixed box and is fitted in a retractable manner, 4 is an overhanging cylinder, and 5 is attached to the tip of the overhanging beam 3. Jacque cylinder, 6
is a float attached to the lower end of the jack cylinder 5;
is a swinging cylinder. The overhanging cylinder 4 has a rod end attached to the inner surface of the distal end of the overhanging beam, and a cylinder bottom attached to the inner surface of the proximal end of the fixed box 1.The extending and contracting operation of the overhanging cylinder 4 causes the overhanging beam 3 to be attached to the fixed box 2. It is designed so that it can be extended and retracted.

In the jacket cylinder 5, the cylinder tube 51 is on the lower side,
°The rod 52 is placed at the tip of the overhang beam 3 in the opposite position to the conventional jack cylinder, and the rod end is connected to the overhang beam 3 through the horizontal pin 53 along the longitudinal direction of the fuselage. It is pivoted. In this way, the jack cylinder 5 is attached to the tip of the overhanging beam so that it can swing in the left and right C width directions of the machine body using the upper part as a fulcrum. The swing cylinder 7 is arranged in an inclined position with the cylinder tube 71 facing downward, on the side of the jack cylinder 5 within the overhang beam 3, and the cylinder bottom is pivotally connected to the overhang beam 3 by a pin 72. The rod 76 of the swing cylinder 7 is pivotally connected by a pin 74 to a bracket 54 protruding from the tip of the rod of the jack cylinder 5.
The expansion and contraction of the swing cylinder 7 causes the jack cylinder 5 to swing between the inclined storage position shown in FIG. 1 and the vertical position shown in FIG. 2. The piping to the swinging cylinder 7 is branched from the piping of the overhanging cylinder 4, and the swinging cylinder 7 is telescopically operated in conjunction with the overhanging cylinder 4, that is, the swinging cylinder 7 is contracted when the overhanging cylinder 4 is extended. , oscillates when the overhang cylinder 4 is contracted.
The cylinder 7 is extended.

At the same time, a locking means for locking the jack cylinder 5 in the vertically extended position will be explained. The cylinder tube 51 of the jack cylinder 5 has convex portions 55 projecting from the upper end to the vicinity of the lower end on both the front and rear sides. This convex portion 55 has an outer half 55m in the width direction of the fuselage and an inner half 55m.
It is formed into a stepped shape with a protrusion dimension larger than b (hereinafter referred to as
The outer half portion 55a is referred to as a high portion, and the inner half portion 55b is referred to as a low portion). On the other hand, the front t+ at the tip of the overhanging beam 3
Fix the left and right blocks 31 and 32 to the l+j song, and this block 31. An engaging recess 33 is formed between +2 and C. This engagement recess 33 has a width dimension that allows the high part 55m to engage with a position facing below the high part 55m of the convex part 55 of the cylinder 5 when the cylinder 5 is in the vertically contracted position. is forming. Therefore, when the jack cylinder 5 is extended in a vertical position, the high portion 55 of the convex portion 55 enters and engages the engagement recess 33 from above.

Also, to explain the structure for holding the jack cylinder 5 in a vertically contracted position, a lock bin 8 is elastically protruded and retracted into the overhang beam 6 via a compression coil spring 81 at the lower end of the front and back sides of the tip of the overhang beam 3. 1ff is maintained. A vertically long head 82 is connected to the end of the lock bin 8 that projects outside the overhang beam 3, and this head 82 is spaced vertically at a predetermined distance from the lower outer surface of the front pant of the fixed box 2. It is locked to the outer surface of a pair of cam pieces 9.9 that are placed and fixed. The outer surface of this cam piece is formed with an inclined cam surface 91 that tapers downward toward the tip of the fixed box 2, and as the overhanging beam B moves, the head 82 of the lock bin 8 moves onto this cam surface 91. By sliding the lock pin 8, the lock pin 8 protrudes inward from the overhang beam 3.
The tip of the lock pin 8 is configured so as to eventually come into contact with the lower portion 55b of the convex portion 55 of the jack cylinder 5 in the vertically contracted position. Due to the abutting engagement of the lock pin 8 with the lower protrusion portion 55b, the jack cylinder 5 is prevented from swinging inward of the overhang beam in the vertically contracted position.

In addition, cutouts 21 and 34 are provided on the lower surface of the tip of the fixed box 2 and the overhanging beam 3 to allow sliding of the jack cylinder 5. Also, in Figure 1, 22
23 is a lock bin for locking the overhanging beam 3 in the retracted state, and 23 is a stopper for the retracting direction of the beam 3.

Although not shown, it is desirable for safety to provide a stopper at the base end of the overhanging beam 3 and at the tip end of the fixed box 2 for regulating the amount of overhang of the beam 3 to a constant level.

The float 6 swings in the left-right direction via pins 56 protruding from both front and back sides of the base of the cylinder tube 51 of the cylinder tube 5, and an elongated hole 62 (shown in FIG. 4) formed in the flow exchange mounting seat 61. It is pivoted so that it can move. □ Next, the effect will be explained.

When using the outriggers, the overhang cylinder 4 is extended from the state shown in FIG. 1, the overhang vibrator 3 is extended outward from the fuselage as shown in FIG. 5, and then the jack cylinder 5 is extended in a vertical position. The float 6 is grounded to float the aircraft, and various operations are performed in this state.

When the overhang beam 3 is extended, the swing cylinder 7 contracts in conjunction with the extension operation of the overhang cylinder 4, thereby moving the jack cylinder 5 from the tilted storage position shown in FIG. It is oscillated to the vertical position shown in FIG. 182.

On the other hand, when the jack cylinder 5 is in the vertical position as described above, the tip of the lock pin 8 is a convex t! of the jack cylinder 5, as shown in Fig. 3.4. It is in a state facing the lower part 55b of E55, and from this state, as the overhanging beam B moves, the lock bin 8 is fixed as described above, and the cam surface 91.9 of the cam piece 9.9 provided on the fixed box 2 is fixed.
1 projects into the overhanging beam 3,
Eventually, the convex portion comes into contact with the lower portion 55bK. This makes it possible to prevent the jack cylinder 5 from swinging while the overhang beam 6 is moving.

When the jack cylinder 5 is extended after the overhang beam is extended, the high portion 55m of the convex portion 55 engages with the engagement recess 66 formed on the inner surface of the overhang beam 3, so that the cylinder 5 is vertically It is locked in the extended position and prevents sideways shaking or falling during work.

When storing the outriggers, the jack cylinder 5 is contracted, and the overhang beam 3 is pulled into the fixed box 2 with the high protrusion portion 55m disengaged from the engagement opening 66 and stored. Since the swing cylinder 7 also contracts at the same time as this overhang beam begins to be retracted, the swing cylinder 5
is automatically displaced to the tilted storage position.

In this way, when using this device in which the outrigger-free cylinder 5 is housed in the overhang beam 3 in an inclined position, when the cylinder 5 is placed in a vertical position during use, the cylinder 5 protrudes below the overhang beam 3. In other words, the cylinder 5 can be made to protrude downward from the aircraft body to reduce the distance from the ground. Therefore, the required stroke of the cylinder 5 to float the aircraft is reduced. It is smaller than the conventional one.

Therefore, the overall length of the jack cylinder 5 can be reduced accordingly. Further, by allowing the cylinder 5 to protrude downward from the machine body in a vertical position, the amount by which the cylinder 5 protrudes upward from the machine body can be made smaller compared to the conventional device.

Therefore, when using this outrigger device, (a) the overall length of the jack cylinder 5 can be reduced; and) the cylinder 5 protrudes an inch below the fuselage due to the synergistic effect of the scales, which allows the jack cylinder 5 to extend upwards above the fuselage. The amount of protrusion can be significantly reduced compared to conventional devices. This eliminates the problem of the jack cylinder 5 interfering with nearby work such as piling work, which was the case in the past, and is very useful for one work.

On the other hand, when the outriggers are retracted, the float 6 is drawn to the side of the moving beam 6 together with the jack cylinder 5 and completely fits under the fixed box 2, that is, the float 6 does not protrude outward from the fuselage, so the conventional device There is no need to remove the float 6 from the jack cylinder 5 each time when driving on public roads. In addition, there is no need to attach or detach the float in this way.Therefore, there is no need to hold the float 6 in place. This can increase the stability of the aircraft support.

By the way, the jack cylinder 5 is connected to the cylinder tube 51.
The overhanging beam 3 is positioned so that the rod 52 is on the lower side and the rod 52 is on the upper side.
According to the above-mentioned embodiment in which the rod 52 is attached to the rod 52, the rod 52 is hidden inside the overhanging beam 3, so that damage to the rod 52, which is likely to occur in any case, and oil leakage and malfunction caused by this can be prevented. However, it goes without saying that the present invention can also be applied to the case where the jack cylinder 5 is attached to the overhanging beam 3 with the cylinder tube 51 facing upward as in the conventional case, and an example thereof is shown in FIGS. It is shown in In Fig. 6.7, the same parts as in the first embodiment are designated by the same reference numerals.

In this 11B2 embodiment, the upper end of the cylinder tube 51 of the cylinder 5 is pivotally connected to the overhanging beam 3 by a pin 56, and a bracket 57 for connecting the swinging cylinder is provided protruding from the outer peripheral surface of the intermediate portion of the cylinder tube 51. ing.

The m-movement cylinder 7 has a cylinder tube 71 attached to the overhanging beam 3 so that it is horizontal when the cylinder is stored.
The tip of the rod 72 is pivotally connected to the bracket 57 by pins 72 and 74, respectively. In this configuration, the jack cylinder 5 assumes a vertical position by the extension operation of the swing cylinder 7, and assumes an inclined storage position by the contraction operation. In addition, in this 12th embodiment, since it is not possible to adopt the jack cylinder locking mechanism based on the convex portion 55 of the jack cylinder 5 and the engagement recess 334 of the overhang beam 3 used in the 1t!1 embodiment, a A lock plate 59 having a lock pin hole 58 is provided on the outer circumferential surface of the lower end of the jack cylinder 5, and the lock pin 8 is engaged with the lock pin hole 58 of the lock plate 59 to lock the jack cylinder 5 in a vertical position. I try to do that.

Alternatively, it is also possible to make the piping of the swing cylinder 7 independent, install a control valve for that cylinder alone, and provide a counterbalance valve in the hydraulic circuit so that the swing cylinder 7 can be locked in the extended state. In this way, there is no need to provide a locking mechanism as described above. This is the same in the case of the above-mentioned first embodiment, and in order to lock the swing cylinder 7 in the contracted position, the locking mechanism using the convex portion 55 and the engagement recess 6B33 may not necessarily be provided. .

As described above, according to the present invention, when the outriggers are retracted, the jack cylinder is pulled into the overhanging beam using the upper part as a fulcrum and stored in the beam in an inclined position, which makes it easier to store the outriggers than conventional outrigger devices. This makes it possible to significantly reduce the amount of upward protrusion of the jack cylinder, which is very advantageous for close work such as pile driving. Also,
Since the float can be stored within the width of the machine along with the jack cylinder, there is no need to attach or detach the float every time you drive on public roads, and the float diameter can be increased to improve stability during outrigger work. It is.

Further, according to the present invention, since the swinging displacement of the above-mentioned jack cylinder is performed by a dedicated swinging cylinder, the swinging displacement operation is highly reliable.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of an embodiment of the present invention in a stored state;
! 421! ! ! 3 is a longitudinal sectional front view of the jack cylinder displaced to a vertical position during the same use, FIG. 3 is an enlarged sectional view taken along the first layer line of FIG.
- A sectional view taken along the line IV, FIG. 5 is a longitudinal sectional front view in a state of use, FIG. 6 is a longitudinal sectional front view showing another embodiment, FIG. 7 is a view equivalent to FIG. 3, and FIG. 8 is a conventional example. A schematic side view of the entire truck crane for explaining the
The figure is an enlarged rear view of the same. 1... Traveling body frame, 2... Fixed box, 6...
・・Extended beam, 4-・・Extended cylinder, 5...
Jacqueline cylinder, 53... Bin serving as a swinging fulcrum of the cylinder, 6... Float, 7... Swinging cylinder. Patent Applicant: Kobe Steel, Ltd. Representative Patent Attorney: Etsuka Kotani Figure 2 - Figure A - Figure 323 - Figure 7

Claims (1)

[Claims] 1. A fixed box fixed to the wheeled traveling body,
An overhang beam overhangs and retractably fitted into this fixed box, an overhang cylinder whose one end is connected to the fixed box and the other end to the overhang beam, and a vertical position and a lower part inside the overhang beam at the tip of the overhang beam. This jack cylinder has a float at its lower end, which is pivoted so that it can swing in the left and right directions using the upper part of the handle as a fulcrum, so that it can be moved in an inclined storage position and in a tilted storage position. An outrigger device for an oil-type working machine, comprising a oscillating cylinder that swings between the tilted storage position and the vertical position.