JPS58145554A - Outrigger device of wheeled work machine - Google Patents

Abstract

PURPOSE:To both suppress a cylinder to a less amount protruded to the upper of a machine body and contain a float to within a width of the machine body under a storage condition, by pivotally mounting the cylinder in a swingable state. CONSTITUTION:At the beginning of starting the housing of an overhung beam, a jack cylinder 5 is pulled to an internal side of the beam 3 by contraction of an overhanging cylinder 4, and the cylinder 5 is automatically swung and displaced from a vertical attitude to a titled housed attitude, hereafter housed of the beam 3 is started. Here a float 6 is placed in a condition closely contacted to the bottom surface of a fixed box 2 in a horizontal attitude. When the cylinder 5 is used and placed in a vertical attitude, the cylinder 5 is protruded to below the beam 3, and a required stroke of the cylinder for lifting a machine body is decreased to smaller stroke than of a conventional machine.

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, a rattan lane crane, or a wheeled shovel.

As shown in FIGS. 6 to 8, this type of outrigger device has two sets on the left and right sides of the traveling body A, and the overall H
The overhanging beam C is extended from the fixed box B, which is installed in a letter-shaped arrangement and fixed to the traveling body A, so that it can be stored.
A retractable jack cylinder E having a float D at the lower end is fixed in a vertical position at the tip of the extended beam C.

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 example of this is the height of the underside of the aircraft below the ground level c (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, jack cylinder E
The overall length of the fuselage will inevitably become longer, and the longer it will protrude upward from the fuselage. Because the jack cylinder protrudes long above the machine, the jack cylinder gets in the way during so-called close-range work, such as piling work or loading a truck close to the machine, making the work extremely 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
is designed so that it fits completely within the legal aircraft width, but in this case, 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 one by one when driving on a public road, and this work of attaching and detaching the flow 1 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.

Hereinafter, embodiments of the present invention will be explained with reference to the drawings. Reference numeral 1 denotes a traveling body frame, 2 a fixed box fixed to the frame 1, and 3 an overhanging beam fitted over the fixed box 2 so as to be retractable. , 4 extends this overhang beam 3,
An overhanging cylinder for storage, 5 is a jack cylinder attached to the tip of the overhang beam 3, 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 3 in the opposite position to the conventional jack cylinder, with the rod 52 facing upward, and the rod end is pivotally connected to the overhang beam B via a horizontal pin 56 along the longitudinal direction of the fuselage. are doing. In this way, the jack cylinder 5
is attached to the tip of the overhang beam so that it can swing in the left and right (1 width) direction of the aircraft with the upper part as the fulcrum, and when the outrigger is retracted, the cylinder 5 is moved from the vertical position to the overhang beam 3 with the upper part as the fulcrum as shown in Figure 1. It is constructed so that it can be stored and hung inside the beam 3 in an inclined position drawn inward. Further, a link 54 is provided to protrude downward from the upper end of the rod of this jack cylinder 5.

The overhanging cylinder 4 can swing vertically with respect to the fixed box 2 by pivotally attaching the base end of the cylinder tube 41 to the inner surface of the fixed box 2 via a horizontal shaft 42 along the longitudinal direction of the traveling body. It is installed. The tip of the mouth/throat 46 of this extended cylinder 4 is rotatably connected to a link 54 protruding from the jack cylinder 5 via a horizontal shaft 44 that also extends in the front-rear direction. In this way, the overhang cylinder 4 and the jack cylinder 5 are interlocked and connected, and at the beginning of the extension of the overhang cylinder 4, while the cylinder 4 rotates downward around the horizontal axis 21, the jack cylinder 5 is directed toward the outside of the overhang beam. In addition, at the beginning of the contraction of the overhanging cylinder 4, the cylinder 4 rotates upward around the horizontal axis 21 and pulls the jack cylinder 5 toward the inner side of the overhanging beam. . In addition, a stopper is provided on the inner surface of the front and rear sides or one side of the overhang beam B, with which a protrusion 45 extending on the front and rear sides or one side of the rod end of the overhang cylinder 4 comes into contact when the jack cylinder 5 is in a vertical position. 31 is fixed, and the extending thrust of the extending cylinder 4 acts directly on the extending beam 3 from the time when the jack cylinder 5 assumes a vertical position.

Next, 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 protruding from the upper end to the vicinity of the lower end on both front and rear sides of the cylinder tube 51 . This convex portion 55 is located in the outer half Nl in the width direction of the fuselage.
55a is formed in a stepped shape with a larger protrusion dimension than the inner half 55b. Below C, outer half 55. is called a high part, and the inner half part 55b is called a low part]. On the other hand, the stretched beam 3
Left and right blocks 32 and 33 on both front and rear sides at the tip of the
are fixed to each other, and an engagement recess 34 is formed between the block filters 2 and 33. This engagement recess 34 is connected to the convex portion 5 of the cylinder 5 when the cylinder 5 is in the vertically contracted position.
High part 55 in 5. It is formed with a width dimension that allows the high portion 55a to engage with the upper portion 55a. 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 64 from above.

Also, to explain the structure for holding the jack cylinder 5 in the vertically contracted position, as shown in Fig. 3.4, a lock pin 7 is attached to the lower end of the front and back sides of the tip of the overhanging beam 3 via a compression coil spring 71. It is held elastically in and out of the overhanging beam 6. A vertically long head 72 is connected to the end of the 0-door pin 7 that protrudes outside the overhang beam 3, and the head 72 is placed vertically at a predetermined interval on the outer surface of the lower part of the tip of the fixed box 2. A pair of cam pieces 8 placed and fixed
．． It is locked to the outer surface of 8. A slanted cam surface 81 is formed on the outer surface of this cam piece, and as the overhanging beam 3 moves, the head 72 of the lock pin 7 is moved toward this cam surface. By sliding 81, the lock pin 7 protrudes inward from the overhang beam 3, and finally the tip of the lock pin 7 reaches the lower part 55 of the convex part 55 of the jack cylinder 5 in the vertically contracted position.
b. This convex lower part 55
Due to the abutting engagement of the lock pin with b, the jack cylinder 5 is prevented from swinging inward of the overhang beam in the vertically contracted position.

Note that cutouts 21 and 35 are provided on the lower surface of the tip of the fixed box 2 and the overhanging beam 3 to allow the jack cylinder 5 to swing. Also, in Figure 1, 22
is a lock bin for locking the overhanging beam 3 in the retracted state.

The float 6 is mounted in the left-right direction via pins 56 protruding from both front and rear sides of the F end of the cylinder tube 51 of the cylinder tube 5, and a long hole 62 (t shown in FIG. 4) formed in the float mounting seat 61. It is pivoted so that it can swing.

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 beam 6 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 Toro is grounded, the aircraft is floated, and various tasks are performed in this state.

However, with the overhang beam retracted, the jack cylinder 5
is in an inclined storage position as shown in the figure.

Then, when the overhanging cylinder 4 starts to extend when the overhanging beam 6 is extended, the cylinder 4 rotates downward by itself around the horizontal axis 21 as described above, and the rod 43 pushes the cylinder 5 upward. Press 54. As a result, the jack cylinder 5 rotates around the horizontal pin 56 and assumes a vertical position, and from this point on, the tension force of the overhang cylinder 4 is applied to the overhang beam 6 via the strike force 31, and the beam 3 The project will begin.

In addition, if the structure is such that the tensioning force of the overhanging cylinder 4 is transmitted to the overhanging beam B from the time when the jack cylinder 5 assumes the vertical position as in this embodiment, the jack cylinder 5
Compared to a structure in which the tension force is continuously transmitted to the extension beam 6 through the cylinder 5 even after the cylinder has assumed a vertical position, a large extension force does not act on the jack cylinder 5, so the cylinder 5 is protected. It will be more beneficial.

On the other hand, when the jack cylinder 5 is in the vertical position as described above, the tip of the lock pin 7 faces the lower part 55b of the convex part 55 of the jack cylinder 5, as shown in Fig. 3.4. From this state, as the overhanging beam B moves, the lock pin 7 projects into the overhanging beam 6 by the guiding action of the cam surfaces 81 and 81 of the cam pieces 8 and 8 provided on the fixed box 2, as described above. 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 overhang beam 3 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 36 formed on the inner surface of the overhang beam 6, so that the cylinder 5 is extended vertically. Locks into position, prevents sideways swinging and falling during work.

Next, when storing the outriggers, the shower cylinder 5 is contracted, and the overhanging beam 6 is pulled into the fixed box 2 with the high convex portion 55a disengaged from the engagement recess 66 and stored. At the beginning of the retraction of the overhanging beam, the overhanging cylinder 4 is contracted and the jack cylinder 5 is
is pulled inward of the overhang beam, so that the jack cylinder 5 is automatically swung from the vertical position to the inclined retracted position, and from this point forward, the retraction of the overhang beam 3 is started.

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 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 6. In other words, the distance between the cylinder 5 and the ground can be reduced by protruding downward from the aircraft body, so that the required stroke of the cylinder 5 to float the aircraft body is smaller than that of the conventional one. 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 conventional devices.

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 made to protrude 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, when the outriggers are retracted, the float 6 is drawn to the overhang beam 3 side together with the cylinder cylinder 5 and completely fits under the fixed box 2. In other words, the float 6 does not protrude outward from the fuselage, which is different from the conventional device. Thus, there is no need to remove the float 6 from the jack cylinder 5 each time when driving on public roads. In addition, since there is no need to attach and detach the 70-toro in this way, there is no need to suppress the weight of the float 6, so it is possible to make the float 6 as large as possible without the 70-toro protruding outward from the fuselage in the stored state. This makes it possible to improve the stability of the aircraft body support.

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, there is no need to add a dedicated drive source such as a hydraulic cylinder for this cylinder rocking displacement. Furthermore, the fixed box 2 is designed such that the overhanging cylinder 4 itself can be swung in conjunction with the jack cylinder 5.
For example, when a non-swiveling extended cylinder and a swingable jack cylinder 5 are interlocked and connected via an intermediate transmission mechanism such as a link mechanism. The structure is much simpler than that, and there is no risk of operational problems such as the swinging displacement of the jack cylinder 5 becoming unnecessarily fast due to the speed increasing action of the intermediate transmission mechanism.

By the way, the cylinder tube 5
According to the above-mentioned embodiment in which the rod 52 is attached to the tip of the overhanging beam in a position opposite to the conventional position in which the rod 52 is on the upper side and the rod 52 is on the upper side, the rod 52 is hidden inside the overhanging beam 6, which is likely to cause damage to the rod 52. In addition to preventing oil leakage and malfunctions due to this, the cylinder tube 51 can be processed for locking means, etc., which should be added to the cylinder 5, so the processing becomes easy. However, in the present invention, the jack cylinder 5 may be installed with the cylinder tube 51 on the upper side, as in the conventional case. In such a case, the overhang cylinder 4 and the jack cylinder 5
The intention is to connect the cylinder tube 51 of the
A direct pivot connection may be made without using 4.

On the other hand, the jack cylinder 5 is placed in a vertically extended position with its mouth closed.
The locking means for locking is not limited to the above-mentioned embodiments, and for example, lock pins that can be elastically protruded and retracted are provided on both front and rear surfaces of the tip of the overhanging arm 3, and this lock pin is provided in a lock hole provided on the side of the jack cylinder 5. It is also possible to automatically engage the cylinder 5.
The lock pin may be manually inserted into the lock hole provided in both J5 and the overhang beam 3.

As described above, according to the present invention, when the outriggers are 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, thereby making it more advantageous 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 jet cylinder, there is no need to attach or detach the float every time you drive on a public road, and the float diameter can be increased to improve stability when working with the IJ. It is something that can be done.

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. This is simple and inexpensive, 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 13 is the same as Figure 2llll.
Figure 4 is an enlarged sectional view taken along line -1, Figure 4 is a sectional view taken along line mV-IV in Figure 6, Figure 5 is a longitudinal sectional front view in use, and Figure 6 is the entire truck crane for explaining the conventional example. FIG. 7 is a plan view of the same, and FIG. 8 is an enlarged rear view. 1... Traveling body frame, 2... Fixed box, 6...
... Overhanging beam, 4... Overhanging cylinder, 5...
Jacket cylinder, 42...Horizontal shaft as a swinging fulcrum of the overhanging cylinder, 44...Horizontal shaft for pivotally connecting the cylinder and the jacking cylinder, 53...Horizontal shaft as a swinging fulcrum of the jacking cylinder. Horizontal bin, 6...Float. Figure V Written Amendment (Voluntary) Commissioner of the Patent Office Shima 1) Haruki Tono1, Indication of the Case 1982 Patent Application No. 279242, Name of the Invention Outrigger Device for Wheeled Working Machines 3, Person Making Amendment Case Relationship with Patent applicant name (119) Kobe Steel, Ltd. 4, agent name) Showa year, month, day (voluntary amendment) 6, subject of amendment Z Contents of amendment (1) Line 7 of page 6 of the specification and in the 10th line, the words "horizontal axis 21" are corrected to "horizontal axis 42". (2) In the specification, from page 11, line 20 to page 12, line 3, the statement ``due to being pulled ~ swinging displacement ~ is started'' is corrected as follows. [The jack cylinder 5 is pulled, but at this time the lock pin 7 prevents the jack cylinder 5 from swinging in the direction of the inclined position. Therefore, during the retracting stroke of the overhang beam B, the jack cylinder 5 is held in the vertically contracted position, and the contraction force of the overhang cylinder 4 is transmitted to the overhang beam 3 via the jack cylinder 5 and the lock pin 7. Then, just before the end of the retraction stroke of the overhanging beam B, the head 72 of the lock pin 7 climbs the cam surfaces si, si of the cam pieces 8, 8 provided on the fixed box 2, so that the lock pin 7 is moved out of the beam. Since the lock pin 7 is pulled in the direction, the lock pin 7 separates from the lower convex portion 55b of the jack cylinder 5. This allows Java 2-

Claims (1)

[Claims] 1. A fixed box fixed to the wheeled traveling body,
It is equipped with an overhanging beam fitted to the fixed box so as to be able to overhang and be retracted, an overhanging cylinder that extends and stores the overhanging beam, and a jack cylinder provided at the tip of the overhanging beam and having a float at the lower end. This jack cylinder is pivoted to the above-mentioned overhang beam so that it can swing from side to side with the upper part as a fulcrum so that it can swing between a vertical position and an inclined retracted position where the lower part is drawn into the overhang beam. A wheel, characterized in that one end of the overhanging cylinder is pivotally connected to the jack cylinder and the other end to the fixed box so as to be movable one-on-one about a horizontal axis along the front-rear direction of the traveling body. Outrigger device for type work machines.