JPH0797183A - Outrigger device - Google Patents

Abstract

PURPOSE:To obtain an outrigger device capable of contriving spreading a departure angle of a vehicle and avoiding interference with each other between a car body side member and a 'float. CONSTITUTION:A float 30 in lower ends of jack cylinders 24, by a slide supporting mechanism X arranged therebetween, can be moved in almost a horizontal direction between a position at use time and a position at storage time in a car width directional inner side from the position at use time and further to a side of the other outrigger. Thus at the time of an outrigged condition of outrigger devices 4, 7, by setting the float of a pair of outriggers 5, 6 and 8, 9 respectively to the position at use time, a landing load applied to each float 30 can be surely supporter. At the time of a storage condition of the outrigger devices 4, 7, by setting each float 30 respectively to the position at storage time, an extending amount of each float 30 to the outward in the car width direction is decreased, to also place each float 30 adjacent to each other in a car body longitudinal direction, and an extending amount of each float 30 to the car body longitudinal direction from the outrigger devices 4, 7 is decreased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outrigger device, and more particularly to a float support structure.

[0002] It is related to.

[0003]

2. Description of the Related Art An outrigger device mounted on a work vehicle such as a crane truck has a jack cylinder attached vertically to the tip of a telescopic girder mounted on the vehicle body in the vehicle width direction. It is configured by attaching a grounding float to the lower end of the cylinder, but in this case, it is customary that the outrigger that projects to the right of the vehicle body and the outrigger that projects to the left of the vehicle body are juxtaposed in the longitudinal direction of the vehicle body.

By the way, in such an outrigger, since the ground load applied to the float is required to be supported by the jack cylinder, the axial center of the jack cylinder is substantially aligned with the center of the float. Has a relatively large ground contact area from the viewpoint of maintaining a small surface pressure against, and therefore the float largely extends outward from the jack cylinder in the vehicle width direction. However, if the state in which the float extends outward in the vehicle width direction beyond the jack cylinder is maintained even in the retracted state of the outrigger, the vehicle width dimension of the vehicle body that is legally restricted is restricted by the float. This is not preferable. As one of the methods for solving such a problem, it is possible to remove the float when the outrigger is stored, but since the float is a heavy object, it is not realistic in terms of operability and workability. Absent.

Under these circumstances, for example, in Japanese Utility Model Laid-Open No. 50-98409, the center of the float is aligned with the axial center of the jack cylinder when the outrigger is used, while the center of the float is jacked when the outrigger is stored. An outrigger device has been proposed in which the retractable girder is moved toward the inner side in the axial direction of the cylinder so that the float does not extend laterally beyond the jack cylinder in the vehicle width direction.

[0006]

However, in the structure in which the float is moved inward in the vehicle width direction with respect to the jack cylinder axis when the outrigger is stored, the vehicle width by the float when the outrigger is stored is increased. Although the limitation can be avoided, there are problems as described below.

For example, when the outrigger is mounted on the rearmost end of the vehicle body, the vehicle departure angle (see θ in FIG. 1) is restricted by the float mounted on the lower end of the jack cylinder. , In this case, the position of the float in the front-rear direction of the vehicle body is constant regardless of the movement of the float when the outrigger is used and when the outrigger is stored (that is, when the vehicle is running). It is uniquely defined by the vertical and vertical mounting positions, and it is impossible, for example, to enlarge it only when the vehicle is running, and therefore it is an obstacle for the vehicle to run on a road with large undulations without hindrance. It was one of the.

On the other hand, a vehicle-body-side member (for example, provided between the wheels and the outrigger device to prevent the mud from splashing on the outrigger device by the wheels) at a position close to the outrigger device in the longitudinal direction of the vehicle body. If the float is movable in the axial direction of the telescopic girder (that is, the vehicle width direction), the relative position of the float in the longitudinal direction of the vehicle body with respect to the telescopic girder is constant. Since there is no change, there is also a problem that interference between the body side member and the float is likely to occur.

Therefore, the present invention has been made as an attempt to provide an outrigger device capable of increasing the departure angle of a vehicle equipped with the outrigger device and avoiding mutual interference between the vehicle body side member and the float. Is.

[0010]

According to the present invention, as a concrete means for solving the above-mentioned problems, a jack cylinder is attached to the tip of an extendable telescopic girder in the vertical direction, and the lower end of the jack cylinder is attached. A pair of outriggers each having a float with a predetermined ground contact area are installed side by side in the vehicle width direction and in front of and behind the vehicle body with the directions of expansion and contraction thereof being opposite to each other. In the outrigger device, the float is disposed between the jack cylinder and the float of each of the outriggers. Can be moved in the horizontal direction between the inside of the width direction and the retracted position located closer to the other outrigger than the axis of the outrigger. It is characterized in that a slide support mechanism for supporting.

[0011]

According to the present invention, the float mounted on the lower end of the jack cylinder has a position at the time of use in which the center thereof coincides with the axial center of the jack cylinder due to the slide support mechanism arranged between the float and the jack cylinder. Since it is movable in a substantially horizontal direction inside the vehicle width direction from the in-use position and between the other outrigger-closed storage positions, the pair of outriggers forming the outrigger device when the outrigger device is in an extended state. By setting the floats to the respective positions when used, the ground load applied to the respective floats can be reliably supported by the jack cylinder, and when the outrigger device is in the retracted state, the floats of the respective outriggers are respectively set to the retracted position. As a result, the amount of extension of each float outward in the vehicle width direction is reduced, and each float Extension of the outrigger device of the respective float close to each other the longitudinal direction of the vehicle body is to be reduced in the body front-rear direction.

[0012]

Therefore, according to the outrigger device of the present invention, when this outrigger device is arranged at the rear end of the vehicle, the departure angle of the vehicle is defined by the float of the outrigger on the rear side of the vehicle body. However, in this case, the float of the rear outrigger is set to the retracted position when the outrigger is in the retracted state, and the amount of extension to the rear side of the vehicle body is smaller than when the outrigger is extended. For example, the float moves to the front side of the vehicle body as compared with the configuration in which the position of the float in the vehicle front-rear direction is set to the same position when the outrigger is retracted as in the above-mentioned known example when the outrigger is extended. It is said that the departure angle of the vehicle can be expanded by that much, which in turn can contribute to improving the performance of the vehicle when moving. One in which results are obtained if.

Further, since the float moves toward the other outrigger in the vehicle front-rear direction from the in-use position in the retracted position and the outrigger device protrudes in the vehicle front-rear direction from the outrigger position, the outrigger, for example. Even when the vehicle body side member is arranged close to the device in the vehicle front-rear direction, mutual interference between the vehicle body side member and the float is prevented as much as possible, and damage to them is prevented. The effect of being avoided by is also obtained.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The outrigger device of the present invention will be described below in detail with reference to the accompanying drawings. A mobile crane Z is shown in FIGS. In this mobile crane Z, a telescopic boom 3 is attached to a swivel base 2 rotatably mounted on a multi-wheel steering type vehicle body 1 having six wheels 10A to 10F, and a first wheel is mounted. 10A and second
A front outrigger device 4 to be described later is provided at a front portion of the vehicle body corresponding to the space between the wheels 10B, and a rear outrigger device 7 to be described later is provided at a rear end of the vehicle body 1.

The front outrigger device 4 is arranged such that a pair of outriggers 5 and 6 having the same structure are directed in the vehicle width direction with respect to the vehicle body 1 in a state where the projecting directions thereof are opposite to each other, and the front and rear directions of the vehicle body are front and rear. Then, they are fixed in a close proximity state. Similarly to the front outrigger device 4, the rear outrigger device 7 faces the vehicle body 1 in the vehicle width direction with a pair of outriggers 8 and 9 having the same configuration with their overhang directions being opposite to each other. In addition, it is configured to be fixed in a close state in front of and behind the vehicle body. The pair of outriggers 5 and 6 of the front outrigger device 4 and the pair of outriggers 8 and 9 of the rear outrigger device 7 have the same configuration. Therefore, here, the structure and the like will be described in detail by taking one of the outriggers 9 constituting the rear outrigger device 7 as an example.

The outrigger 9 extends to the left side of the vehicle body at the rear end of the vehicle body 1 and supports the vehicle body 1.
As shown in FIG. 3, a fixed box girder 21 fixedly arranged in the vehicle width direction at the rear end of the vehicle body, a first telescopic girder 22 and a first telescopic girder 22 which are telescopically installed in the fixed box girder 21. An extendable girder 20 formed of a second extendable girder 23 that is extendably inserted into the elastic member 22 and a tip of the second extendable girder 23 of the extendable girder 20 in the vertical direction and the lower surface of the second extendable girder 23. And a float 30 connected to a lower end of a cylinder rod 26 of the jack cylinder 24 via a slide support mechanism X described later.
It has and. Then, the most contracted state of the expansion / contraction girder 20.
In the (outrigger retracted state), the jack cylinder 24 is positioned inside the outer end surface of the first telescopic girder 22 in the vehicle width direction. In addition, the extension state of the telescopic girder 20
In the (outrigger extension state), the jack cylinder 24 is made to extend further outward than the outer end surface of the first telescopic beam 22. The jack cylinder 24
5 is attached to the tip of the second telescopic beam 23 of the telescopic beam 20 with the cylinder rod 26 facing downward, as shown in FIGS. As shown in FIGS. 6 and 11, the cylinder rod 26 has a spherical shaft end 26a at its tip.
On the other hand, a shelf-like hooking portion 26b and a shaft-shaped guide shaft portion 26d are formed immediately above the spherical shaft end 26a, and the upper side of the guide shaft portion 26d is further than the guide shaft portion 26d. The small diameter portion 26c has a small diameter. It should be noted that this spherical shaft end 26a has a float 30 which will be described later, as shown in FIG.
The spherical seat 33 on the side supports the ground load, and the retaining portion 26b engages with guide portions 42a, 42a of the slide member 40, which will be described later, in the axial direction of the cylinder rod as shown in FIG. 6 to suspend and support the float 30, and the guide shaft portion 26d is engaged with the end faces of the guide portions 42a, 42a of the slide member 40 in the horizontal direction as shown in FIG. The small-diameter portion 26c functions as a relief portion that avoids interference between the guide portions 42a, 42a and the cylinder rod 26 when the float 30 is grounded in a tilted state as shown by a chain line in FIG. To do.

The float 30 is shown in FIG. 4, FIG. 5 and FIG.
As shown in FIG. 1, a float main body 31 in the shape of a rectangular thin box,
The float main body portion 31 is provided with a load bearing portion 32 attached to the center position on the upper surface side. Further, on the upper surface of the load bearing portion 32, there is formed a spherical seat 33 on which the spherical shaft end 26a of the cylinder rod 26 can be fitted and slid.

The slide support mechanism X supports the float 30 so as to be movable horizontally with respect to the cylinder rod 26 of the jack cylinder 24.
As shown in FIG. 11, it is composed of a slide member 40, which will be described later, arranged on the side of the float 30 and a locking bracket 50 arranged on the side of the jack cylinder 24.

The slide member 40 has a pair of left and right side plates 4 integrally formed with hooking pieces 44, 44, which are bent and extended in a substantially L shape, respectively at a central portion and one end portion in the longitudinal direction of a strip-shaped plate material.
1, 41 are arranged to face the upper surface of the load bearing portion 32 of the float 30 so that the spherical seat 33 is located at the center position of each of the hooking pieces 44, 44 ,. In addition, between the pair of side plates 41, side plates 41, a connecting plate 42 made of a substantially U-shaped plate member is provided at both ends of which the opening side is located on the side of each of the hanging pieces 44, 44, ... The guide portions 42a, 42a are formed by being fixedly attached to the above-mentioned hooking pieces 44, 44 ,. still,
In this case, the mounting position of the slide member 40 in the plane direction with respect to the float 30 is set so that the diagonal line of the square float 30 and the axis line of the slide member 40 coincide with each other, as shown in FIGS. 4 and 7. .

Further, the side plate 41 has a height on the side opposite to the hooking piece which is lower than that of the hooking piece 44 to form a first relief portion 45, and also the space between the hooking pieces 44, 44 is also increased. The height thereof is lowered to form the second escape portion 46. This first and second
Of the escape portions 45 and 46, the first escape portion 45 includes the side plate 41 and the latch bracket 5 when the slide member 40 rotates in the horizontal plane about the cylinder rod 26.
In order to avoid the interference with 0, the second relief portion 46 is provided with the side plate 41 and the cylinder rod 26 when the float 30 is grounded in a tilted state as shown in FIG.
It is for avoiding interference with.

Further, the U-shaped continuous portion of the connecting plate 42 functions as a stopper portion 42b for preventing the cylinder rod 26 from slipping out of the slide member 40. Further, the guide portions 42a, 42a are the same as those shown in FIGS.
As shown in FIG.
And the float 30 are suspended and supported on the cylinder rod 26 side by engaging with the guide rod portion 26d of the cylinder rod 26 in the horizontal direction. Thus, the movement of the float 30 with respect to the cylinder rod 26 in the horizontal direction is restricted.

The latch bracket 50 is shown in FIGS.
As shown in FIG. 1, an arm member 51 fastened and fixed to a corner of a rectangular end plate 25 located at the lower end of the jack cylinder 24, and a state in which the arm member 51 extends in the horizontal direction with respect to the end of the arm member 51. And a latch plate 52 fixed by. The arrangement direction of the retaining plate 52 is set so that the axis of the retaining plate 52 passes through the center of the cylinder rod 26 in the plane direction thereof, and the tip surface 52a of the retaining plate 52 and the cylinder rod 26 are arranged.
The distance from the shaft center of
The size is set to be slightly larger than the distance between the end surface on the formation side and the center of the spherical seat 33 (see FIG. 8). Further, the arrangement position of the latch plate 52 in the vertical direction (axial direction of the cylinder rod 26) is as shown in FIG.
When 6 is in the most contracted state, it is set so as to be positioned slightly below the lower surface position of each of the hooking pieces 44, 44, ... Of the slide member 40 suspended and supported by this.

The arm member 51 is attached to the corner portion of the end plate 25 of the jack cylinder 24 as described above, and its attachment position is set as follows. That is, as shown in FIGS. 4 and 7, in the jack cylinder 24, the two end sides of the end plate 25 of the jack cylinder 24 are parallel to the axial direction of the second telescopic girder 23, so that the tip end portion of the second telescopic girder 23 is parallel to the axial direction. Attached to the arm member 5
1 is an end plate 25 of the jack cylinder 24
Of the four corners, the other outriggers located near the second expansion / contraction girder 23 and adjacent thereto, that is, the corners located near the outriggers 8 are attached. Further, in this embodiment, the arm member 51 is attached to the jack cylinder 24 side, but this is because of the mounting structure that the jack cylinder 24 largely protrudes downward from the second telescopic girder 23. Therefore, in the case of a mounting structure in which the jack cylinder 24 is fixed to the second telescopic girder 23 without protruding so much downward, the arm member 51 is not placed on the jack cylinder 24 side but on the second It is also possible to attach directly to the telescopic girder 23 side.

Slide support mechanism X constructed as described above
When the float 30 is suspended and supported on the lower end of the cylinder rod 26 of the jack cylinder 24 via the
Is pushed and pulled in the horizontal direction to move diagonally with respect to the second telescopic girder 23 at the lower end of the jack cylinder 24, and the storage position shown in FIGS. 4 to 6 and FIGS. The position can be selectively set to the in-use position shown in FIG.

That is, in the retracted position, FIGS.
, The cylinder rod 26 is located closer to the stopper portion 42b of the slide member 40, and the respective locking pieces 44, 44, ... Of the slide member 40 engage with the locking plate 52 of the locking bracket 50. I am fit. Therefore, in this retracted position, the swing of the float 30 is restricted by the engagement of the respective locking pieces 44, 44, ... Of the slide member 40 and the locking plate 52 of the locking bracket 50, while The movement of the float 30 in the horizontal direction is performed by the guide shaft portion 26d of the cylinder rod 26 and the slide member 40.
It is regulated by the engagement with the side stopper portion 42b and the engagement of the pin 64 inserted into the third pin receiving hole 63 with the small diameter portion 26c of the cylinder rod 26. Then, in the storage position, the float 30 is
Has its center moved diagonally inward from the axial center position of the jack cylinder 24 toward the other outrigger 9 side,
In the vehicle width direction, it is located on the inner side in the vehicle width direction from the tip of the second elastic girder 23 of the elastic girder 20. In the vehicle length direction, the elastic girder 20 of the outrigger 9 and the elastic girder 20 of the other outrigger 8 are arranged. The float 30 is located in the straddle position, and as a result, the float 30 is positioned within the space occupied by the rear outrigger device 7 including the pair of outriggers 8 and 9.

On the other hand, in the in-use position, FIGS.
, The axis of the cylinder rod 26 and the axis of the spherical seat 33 of the float 30 are aligned with each other, and the hooking pieces 44, 44, ... Of the slide member 40 and the hooking bracket 50 are hooked. The engagement state with the stop plate 52 is released. Further, in this case, as shown in FIG.
The position of the cylinder rod 26 and the float 30 in the horizontal direction is restricted by sandwiching the cylinder rod 26 by a pair of pins 64, 64 fitted in the first pin receiving hole 62 and the second pin receiving hole 62, respectively. The swing of 30 is free. Therefore, when the jack cylinder 24 extends and the float 30 comes into contact with the ground in this state, as shown by the solid line in FIG.
a comes into contact with the spherical seat 33 on the float 30 side, and the float 3
The ground load applied to 0 is supported by the jack cylinder 24.

In this case, if the ground contact point is inclined, the float 30 is inclined as shown by the chain line in FIG. 10, but in this case, the cylinder rod 26 has a small diameter portion 26c.
Since the cylinder rod 26 and the guide portions 42a, 42a on the float 30 side are prevented from being interfered with each other, the second relief portion 46 of the side plate 41 interferes with the side plate 41 and the cylinder rod 26. Is also avoided and an appropriate load bearing function is achieved.

When the float 30 is set to the in-use position, as shown in FIG. 7, the float 30 extends from the second telescopic girder 23 in the vehicle width direction at the axial center position of the jack cylinder 24. It is in a state of extending outward and rearward in the vehicle length direction, and is in a grounded state in which the extension width of the telescopic girder 20 is used to the maximum extent.

The state in which the float 30 is set to the retracted position (that is, each hook 4 of the slide member 40)
4, 44, ... and the latch plate 52 of the latch bracket 50
If the jack cylinder 24 is erroneously operated to extend in the state where the float 30 is engaged with the slide support mechanism X, the slide support mechanism X may be damaged. Therefore, in this embodiment, the float 30 is set to the retracted position. 1 is equipped with an interlock mechanism so that the extension operation of the jack cylinder 24 cannot be performed. That is, FIG. 5, FIG. 8 and FIG.
As shown in FIG. 1, a limit switch 53 having an actuator 54 is attached to the arm member 51 of the latch bracket 50, and when the float 30 is set to the retracted position, the actuator 54 is attached to the latch piece 44. The two-position solenoid on-off valve 57 is provided at a position downstream of the direction switching valve 59 of the extension side oil passage 56 of the jack cylinder 24 as shown in FIG. When the limit switch 53 is turned on, the opening / closing valve 57 is closed to close the oil passage 56. This allows
The slide support mechanism X is reliably prevented from being damaged by an erroneous operation.

The construction and operation of the outrigger 9 of the pair of outriggers 8 and 9 constituting the rear outrigger device 7 have been described above.
In the above, the front outrigger device 4 and the rear outrigger device 7 are configured using the outriggers having the same configuration as the outriggers 9 as described above. Therefore, both the floats 30 and 30 of the outriggers 5 and 6 of the front outrigger device 4 and the floats 30 and 30 of the outriggers 8 and 9 of the rear outrigger device 7, respectively, can be moved diagonally with respect to the vehicle body 1. In this embodiment, FIG.
In FIG. 5, the moving direction of the float 30 is defined so that the float 30 moves toward the other outrigger of each pair as indicated by the arrow. That is, in the front outrigger device 4, the float 30 of one outrigger 5 is diagonally rearward, and the float 3 of the other outrigger 6 is.
0 is diagonally forward, and in the rear outrigger device 7, the float 30 of one outrigger 8 is diagonally backward,
The float 30 of the other outrigger 9 can be moved diagonally forward.

In this way, the float 30 of each outrigger
The following advantages can be obtained by making it possible to move diagonally and defining the moving direction.

First, the float 3 of each outrigger
0 is set to the retracted position when the outrigger is in the retracted state, and is pulled inward in the vehicle width direction from the position in the extended state, that is, the in-use position. Therefore, the vehicle width of the vehicle body 1 is limited by the float 30. Therefore, the vehicle width of the vehicle body 1 can be increased accordingly.

Second, as shown in FIG. 1, the departure angle θ of the vehicle body 1 is the float 3 of the rearmost outrigger.
0, that is, it is defined by the float 30 of the outrigger 9, but in this embodiment, when the outrigger is in the retracted state, the float 30 is set to the retracted position, so that the float cylinder 30 is set at the retracted position. Since the float 30 is also moved to the front of the vehicle body, the departure angle can be easily increased by the amount of the movement of the float 30 without removing the float 30, for example. Performance during movement (for example, safe driving on a road with large undulations) is achieved.

Thirdly, by setting the float 30 to the retracted position, the float 30 of each outrigger moves toward the other pair of outriggers (in other words, moves into the occupied space of the outrigger device). Therefore, as shown in FIGS. 1 and 2, front and rear sides of the front outrigger device 4 and the rear outrigger device 7 respectively.
Even if the mudguard sheets 11 to 13 are attached to the front sides of the floats, the float 30 and the mudguard sheets 11 to 13 interfere with each other because the float 30 is located in the occupied space of the outrigger device. It is prevented and does not cause unnecessary damage to them. The effect of preventing the interference with the float 30 is as follows.
However, the same applies to various vehicle body-side members that are arranged close to the outrigger.

[Brief description of drawings]

FIG. 1 is a side view of a mobile crane equipped with an outrigger device according to an embodiment of the present invention.

FIG. 2 is a view taken along the line II-II in FIG.

FIG. 3 is an enlarged view taken along the line III-III of FIG. 1, showing the original drawing of the outrigger retracted state and the drawing of the outrigger extended state.

4 is a view taken along the line IV-IV in FIG.

5 is a sectional view taken along line VV of FIG.

6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is an enlarged arrow view of FIG. 3 taken along line VII-VII.

FIG. 8 is a diagram showing the hydraulic circuit of the jack cylinder in FIG.
It is a VIII-VIII sectional view.

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is a state change diagram of FIG. 9;

FIG. 11 is an exploded perspective view of the float portion shown in FIG.

[Explanation of symbols]

1 is a vehicle body, 2 is a swivel base, 3 is a boom, 4 is a front outrigger device, 5 and 6 are outriggers, 7 is a rear outrigger device, 8 and 9 are outriggers, and 10A to 10A.
F is a wheel, 11 to 13 are mudguard sheets, 20 is a telescopic girder,
21 is a fixed box girder, 22 is a first telescopic girder, 23 is a second telescopic girder, 24 is a jack cylinder, 26 is a cylinder rod,
30 is a float, 31 is a float main body part, 32 is a load bearing part, 33 is a spherical seat, 40 is a slide member, 41 is a side plate, 42 is a connecting plate, 44 is a hooking piece, 45 is a first relief part,
46 is a second relief portion, 50 is a latch bracket, 51 is an arm member, 52 is a latch plate, 53 is a limit switch, 54 is an operator, 56 is an oil passage, 57 is an opening / closing valve, 58 is a solenoid coil, 59 Is a directional control valve, 61 to 63 are pin receiving holes, and 64 is a pin.

Claims (1)

[Claims] 1. A pair of outriggers each having a jack cylinder attached vertically to the end of an extendable telescopic girder and a float having a predetermined ground contact area attached to the lower end of the jack cylinder. What is claimed is: 1.Outrigger devices arranged in parallel with respect to a vehicle body in a vehicle width direction and in front and rear directions of a vehicle body in a state where directions thereof are opposite to each other, wherein the jack cylinder and the float of each of the outriggers are provided. Between the float and the in-use position in which the float is located on the axial center of the jack cylinder, and inward in the vehicle width direction from the in-use position and closer to the other outrigger than the axial center of the outrigger. An outrigger characterized by being provided with a slide support mechanism for movably supporting in a substantially horizontal direction between the stored and stored positions. Apparatus.