JPS5849543A - Out-rigger equipment of wheel type working machine - Google Patents

Abstract

PURPOSE:To retract a jack cylinder into a sponson beam in order to house it under the inclined state by pivoting the jack cylinder to the extremity of the sponson beam so as to be swung left and right with respect to the upper point as the supporting point. CONSTITUTION:When an out-rigger is stored, a jack cylinder 5 is contracted and with a high-point projection 55a coming off an engagement dent 36, a sponson beam 3 is retracted into a fixed box 2. At the initial time of starting the housing of the sponson beam 3 movement of the beam 3 is started synchronously to the movement of a rod 42 of a stretchable cylinder 4. Just before the completion of the housing thereof, a lock pin is detached from a low-point projection 55b so that the jack cylinder 5 being vertically contracted is undone. From the completion point of the housing of the sponson beam 3 the rod 42 of the stretchable cylinder 4 is independently moved in the reverse direction to that in which stretched. During the movement, the jack cylinder 5 is automatically displaced from the vertical state to the inclined and housed state.

Description

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

As shown in FIGS. 6 to 8, this type of A-IJ gas device is installed in two sets on both the front and rear sides of a traveling body A, each on the left and right sides, in an H-shaped arrangement as a whole, and each is fixed to the traveling body A. An overhanging beam C is extended over a fixed box B, which is fitted in a retractable manner, 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. There is.

However, this type of conventional outrigger device has the following problems. That is, this type of wheel-type working machine is subject to various restrictions on the body structure due to the fact that it runs on public roads. One of these is the height of the underside of the aircraft from the ground (hereinafter referred to as the aircraft height). 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
The overall length of the fuselage will inevitably become longer, and the longer it will protrude upward from the fuselage. In this way, the jack cylinder protrudes above the machine for a long time, so the jack cylinder gets in the way during so-called close-range work such as piling work and loading with a truck close to the machine, making the work very inconvenient. was.

Further, in order to improve the stability of supporting the fuselage, it is desirable that the overhanging beam C extends as long as possible to the outside of the fuselage.

For this reason, when the overhang beam is retracted, the jack cylinder E
Although it is designed so that it fits completely within the legal aircraft width, if this is done, the outer half of the float D attached to the lower end of the cylinder E will protrude from within the aircraft width.

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 has been developed to make it possible to reduce the amount of upward protrusion of the jet cylinder while adhering to legal restrictions, and to keep the float within the width of the machine body in the retracted state. The purpose is to obtain an outrigger device for a machine, and its configuration is as follows.

The present invention is configured such that the cylinder is pivoted to the tip of the overhang beam so as to be able to swing in the left and right directions using the upper part as a fulcrum, so that the cylinder can be drawn toward the inside of the overhang beam and stored in an inclined position. This is the basic feature, and in addition to this, the posture change operation of the above-mentioned jack cylinder from the tilted storage position to the vertical position and vice versa,
It is characterized in that it is automatically performed in conjunction with the expansion and contraction operation of the overhanging cylinder.

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, 6 is an overhanging beam that overhangs this fixed box 2 and is fitted so as to be retractable, and 4 is an overhang for extending and storing this overhanging beam. The cylinder 5 is a jack cylinder attached to the tip of an overhanging beam 6, and 6 is a float attached to the lower end of the jack cylinder 5.

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 B in the opposite position to the conventional jack cylinder, with the rod 52 facing upward, and the rod end is pivoted to the overhang beam 6 via the horizontal pin 5 along the longitudinal direction of the fuselage. I'm wearing it. In this way, the jack cylinder 5
so that it can swing in the horizontal (width) direction of the aircraft using the upper part as a fulcrum.
The cylinder 5 is constructed so that it can be stored in the beam 6 from a vertical position to an inclined position in which the overhanging beam 3 is drawn inward using the upper part as a fulcrum as shown in FIG.

The overhang cylinder 4 connects the base end of the cylinder tube 41 to the inner surface of the fixed box 2, and the tip of the rod 42 to the inner surface of the front end of the overhang beam B. The expansion and contraction of the overhang cylinder 4 causes the overhang beam to 6 is extended from the fixed box 2 so that it can be stored.

In this case, the rod end of the overhang cylinder 4 and the overhang beam 6 are connected as follows.

That is, a bracket 4 is fixed to the rod end of the overhanging cylinder 4, and a long hole 44 is provided in the bracket 4 along the direction of expansion and contraction of the cylinder. On the other hand, the overhanging beam B has two horizontal pins 51.32 on the left and right inside the tip.
are fixed to each other with an interval smaller than the length of the elongated hole 44, and both pins 1 and 32 are inserted into the elongated hole 44 and engaged so as to be movable within a certain length range. There is. In this way, the rod 42 of the overhanging cylinder 4 is connected to the overhanging beam 6 so that it can overhang within a certain length range and can freely move (idle movement) in the storage direction.

Further, the bracket 4 fixed to the rod end of the overhanging cylinder 4 includes a link mounting seat 45 fixedly installed below the bracket, a link mechanism 7 consisting of first and second links 71 and 72, and a jack cylinder 5. It is interlocked and connected to the jack cylinder 5 via a link mounting seat 54 fixed to the tip of the rod. First link 71 of link mechanism 7
It is formed into a dogleg shape, and its center is pivotally connected to the overhang beam 6 via a fixing pin 66. The second link 72 is
They are pivotally connected to this first link 71 via a movable pin 73 so as to be rotatable with each other. The first link 71 and the link mounting seat 45 are pivotally connected via a long hole 46 in order to convert the linear motion of the rod 42 into a rotational motion of the first link 71. Describing the locking means for locking the cylinder 5 in the vertically extended position, the cylinder tube 51 of the cylinder 5 has protrusions 55 protruding from the upper end to the vicinity of the lower end on both the front and rear sides. There is. The convex portion 55 is formed in a step shape in which the outer half 55a in the width direction of the aircraft body has a larger protrusion dimension than the inner half 55b (hereinafter, the outer half 55a will be referred to as a high part, and the inner half 55b
is called the lower part). On the other hand, left and right blocks 64. The filter 5 is fixed, and an engagement recess 36 is formed between the blocks 34 and 35. The four engaging portions 36 have a width dimension that allows the high portion 55a to engage with a position facing below the high portion 55a of the convex portion 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 55a of the convex portion 55 enters and engages the engagement recess 66 from above.

Also, to explain the structure for holding the jack cylinder 5 in the vertically contracted position, a lock pin 8 is attached to the lower end of the front and back sides of the tip of the overhang beam 6 through a compression coil spring 81 so that the lock pin 8 is elastically inserted into the overhang beam filter. It is kept at will. A vertically long head 82 is connected to the end of the lock pin 8 that protrudes outside the overhang beam filter.
are locked to the outer surfaces of a pair of cam pieces 999 fixedly arranged vertically at a predetermined interval on the lower outer surface of the tip of the fixed box 2. On the outer surface of this cam piece, an inclined cam surface 91 is formed that slopes toward the tip of the fixed box 2, and as the overhanging beam B moves, the head 82 of the lock pin 8 moves onto this cam surface. By sliding 91,
The lock pin 8 projects inward of the overhanging beam 6, and the tip of the lock pin 8 is configured so as to finally come into contact with the lower portion 55b of the convex portion 55 of the jack cylinder 5 in the vertically contracted position. Lock pin 8 to this convex lower part 55b
Due to this abutting engagement, the jack cylinder 5 is prevented from swinging inward of the overhanging beam in the vertically contracted position.

Note that a notch 21 is provided on the lower surface of the tip of the fixed box 2 and the overhang beam 6 to allow the swinging of the cylinder 5. 7 is provided. Also, the first
In the figure, 22 is a lock pin for locking the extended beam 6 in the retracted state, and 2 is a stopper for the beam 6 in the retracting direction. Further, although not shown, it is desirable for safety to provide a stopper at the base end of the overhanging beam B and at the tip of the fixed box 2 in order to keep the amount of overhang of the beam B constant.

The float 6 swings in the left-right direction via pins 56 protruding from both front and back sides of the lower end of the cylinder tube 51 of the cylinder tube 5, and a long hole 62 (shown in FIG. 4) formed in the float mounting seat 61. It is possible to pivot.

Next, the effect will be explained.

When using the outriggers, extend the overhang cylinder 4 from the state shown in Fig. 1 to extend the outrigger beam to the outside of the fuselage as shown in Fig. 5, and then extend the jack cylinder 5 in a vertical position to open the float 6. The aircraft is grounded and the aircraft is floated, and various operations are performed in this state.

lO- However, when the overhang cylinder 4 starts to extend when the overhang beam A is extended, the rod 42 of the cylinder 4 is inserted into the pin 61. During the idle movement (single movement) of the rod 42 within the free movement length range of the filter 2, the link mechanism 7 is rotated in the direction of the arrow in FIG.
The jack cylinder 5 is automatically and forcibly oscillated from the tilted storage position to the vertical position shown in FIG.

At this point, the pins 31, 52 have finished their free movement within the elongated hole 44, and from this point on the overhanging beam B will begin to extend.

- When the jack cylinder 5 is in the vertical position as described above, the tip of the lock pin 8 faces the lower part 55b of the convex part 55 of the jack cylinder 5, as shown in Fig. 6.4. From this state, as the overhanging beam B moves, the locking pin 8 becomes the cam piece provided on the fixed box 2 as described above. , 9 cam surface 91 , '9
1 projects into the overhanging beam 6,
Eventually, it comes into contact with the lower protrusion portion 55b. This makes it possible to prevent the jack cylinder 5 from swinging while the overhanging beam filter is moving.

When the jack cylinder 5 is extended after the overhang beam is extended, the high part 55a of the convex portion 55 engages with the engagement recess 6 formed on the inner surface of the overhang beam B, so that the cylinder 5 becomes vertical. It is locked in the extended position, preventing sideways shaking and falling during work.

Next, when storing the outriggers, the jack cylinder 5 is contracted, and the overhanging beam 6 is pulled into the fixed box 2 with the high protrusion part 55a disengaged from the engagement recess part 6 and stored. At the beginning of the retraction of the overhanging beam, the rod 42 of the overhanging cylinder 4 attempts to move independently in the opposite direction to when it is extended, but at this time, the jack cylinder 5 is prevented from swinging in the direction of the tilted posture by the lock pin 8. condition, and the link mechanism 7 does not operate.
Simultaneously with the movement of the rod 42 of the overhang cylinder 4, the overhang beam filter starts moving. Then, just before the overhang beam is completely retracted, the head 82 of the lock pin 8 is connected to the cam piece 9,
By climbing the cam surface 91.91 of 9, the lock pin 8 separates from the lower convex portion 551), and the lock of the jack cylinder 5 in the vertically contracted position is released. For this reason,
From the time when the overhanging beam filter is completely retracted, the rod 42 of the overhanging cylinder 4 moves independently in the opposite direction to when it was extended.
During this time, the action of the link mechanism 7 automatically displaces the jack cylinder 5 from the vertical position shown in FIG. 2 to the inclined retracted position shown in FIG. At this time, the float 6 is in close contact with the lower surface of the fixed box 2 in a horizontal position.

In this way, when the outriggers are retracted, the jack cylinder 5
When using this outrigger device in which the cylinder is housed in the overhang beam 6 in an inclined position, when the cylinder 5 is placed in a vertical position during use, the cylinder 5 protrudes below the overhang beam. Since the distance between the cylinder 5 and the ground can be reduced by projecting the cylinder 5 downward from the aircraft, the required stroke of the cylinder 5 to float the aircraft can be smaller than that of the conventional art. Therefore, the overall length of the jack cylinder 5 can be reduced accordingly. Furthermore, by allowing the cylinder 5 to protrude downward from the machine body in a vertical position, the amount by which the cylinder 5 projects 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 (b) the cylinder 5 can be protruded downward from the fuselage due to the synergistic effect of the two points. The amount of protrusion can be significantly reduced compared to conventional devices. Therefore, there is no fear that the jack cylinder 5 will interfere with nearby work such as piling work, unlike in the past, which is very useful for work.

On the other hand, in the retracted state, the float 6 is drawn to the overhang beam 6 side together with the jet cylinder 5 and completely fits on the lower surface of the fixed box 2, which means that the float 6 does not protrude outside the fuselage. It is no longer necessary to remove the float 6 from the Shirt Pheasant Link 5 each time when driving on public roads unlike the device. In addition, by eliminating the need to attach and detach the float, there is no need to suppress the weight of the float, so the float 6 can be made as large as possible without protruding outward from the fuselage in the stored state. , This increases the stability of the aircraft support and provides scales.

In addition, when using this device, the swing displacement operation between the vertical position and the tilted storage position of the jack cylinder 5 can be automatically and forcibly performed using the expansion and contraction operation of the overhanging cylinder 4. Therefore, the reliability of this jack cylinder displacement operation is excellent, and there is no need for extra operations regarding this operation. Furthermore, since there is no need to add a dedicated drive source such as a hydraulic cylinder for this cylinder rocking displacement, the structure in this respect is simple and compact, and the cost is low.

By the way, in the above embodiment, two pins 1. Although the filter 2 is provided on the overhanging beam B, it is of course possible to use only one pin (protrusion). Also,
The same protrusion may be provided on the overhang cylinder 4 side, and a long hole that engages with the protrusion may be provided on the overhang beam 6 side. Furthermore, a structure is provided in which the overhanging cylinder 4 is connected to the overhanging beam B so that it can freely move within a certain range in the expansion and contraction direction, and a link mechanism 7 that transmits the free movement of the overhanging cylinder to the jack cylinder 5 as a swinging displacement force is provided. The specific structure may be changed as appropriate when implementing the present invention. Furthermore, the locking means for locking the jack cylinder 5 in the vertically extended position is not limited to the above embodiment. It is also possible to have the lock pin automatically engage the lock hole provided on the jack cylinder 5 side, or manually insert the lock pin into the lock hole provided on both the jack cylinder 5 and the overhang beam filter. It is also possible to make it more crowded. Further, in the above embodiment, the cylinder 5 was installed at the tip of the overhanging beam with the cylinder tube 51 facing downward, but of course the cylinder 5 was installed with the cylinder tube 51 facing upward as in the prior art. You may. However, according to the above embodiment, since the rod 52 is hidden in the overhanging beam filter, it is possible to prevent damage to the rod 52 that is likely to occur, oil leakage, and malfunction due to this, and also prevent locking means to be added to the cylinder 5. Since the cylinder tube 51 only needs to be processed for such purposes, the processing becomes easy.

As described above, according to the present invention, when the outrigger is retracted, the jack cylinder is drawn into the overhanging beam using the upper part as a fulcrum and is stored in the beam in an inclined position, which makes it more advantageous than the conventional outrigger device. 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 17- each time you drive on a public road, and the float diameter can be increased to improve stability during outrigger work. It is possible.

Further, according to the present invention, the swinging displacement of the above-mentioned jack cylinder can be performed by its own blade by utilizing the expansion and contraction operation of the extending cylinder without using a special drive source dedicated for it, so that the structure is simplified. It is simple and low in cost, and the cylinder rocking displacement operation is reliable and 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;
Figure 2 is a longitudinal sectional front view of the jack cylinder displaced to the vertical position during the same use, and Figure 5 is the same as Figure 2 ■-■
FIG. 4 is an enlarged sectional view taken along the line IV-IV in FIG. 6, FIG. 5 is a longitudinal sectional front view in use, and FIG. 6 is a schematic diagram of the entire truck crane for explaining a conventional example. FIG. 7 is a side view, FIG. 7 is a plan view of the same, and FIG. 8 is an enlarged rear view of the same. 1... Traveling body frame, 2... Fixed box, Ro.
... Overhanging beam, 4... Overhanging cylinder, 5...
Shirt 18 - Pheasant cylinder, 44...Elongated hole for freely movably connecting the overhang cylinder to the overhang beam, 61. Ro2...
A pin as a protrusion engaged with the elongated hole, 5... a pin as a swinging fulcrum of the jack cylinder, 6... a float, 7... a link mechanism. Patent applicant: Kobe Steel, Ltd. Figure 2 Figure 7 Figure 7

Claims (1)

[Claims] 1. A fixed box fixed to a 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. and a jack cylinder having a float at its lower end, which is pivotally connected to the upper part as a fulcrum so as to be able to swing in the left-right direction, and the above-mentioned extending cylinder is connected to an extending beam. The above-mentioned jack cylinder is extended within a certain length range and connected so as to be freely movable in the storage direction, and within the free movement stroke of the extended cylinder with respect to this extended beam, the above-mentioned jack cylinder is swung from the tilted storage position to the vertical position or vice versa. 1. An outrigger device for a wheel-type working machine, characterized in that the extending cylinder and the jack cylinder are interlocked and connected via a link mechanism so as to be dynamically displaced. 2 An overhanging cylinder and an overhanging beam are provided with an elongated hole extending along the retraction direction on one side, and a protrusion on the other side, and by engaging this protrusion with the elongated hole so as to be movable in the length direction of the elongated hole. 2. The outrigger device for a wheel-type working machine according to claim 1, wherein the outrigger device extends from the overhang beam within the range of the elongated hole and is connected to the overhang beam so as to be freely movable in the storage direction.