JPH04201992A - Outrigger device for construction machine - Google Patents

Abstract

PURPOSE:To extremely lighten the weight and reduce the cost with a very simple structure by locking one end of a cable to an appropriate position around the tip of a cylinder part, and the other end to an appropriate position in the root part of the cylinder part. CONSTITUTION:When a pulley 9 is rotated in the direction of an arrow mark A by a cable drive unit 5, a secondary side cable 8b is taken up by a pulley 9, and a primary side cable 8a is delivered in the direction of an arrow mark C. Then the secondary side cable 8b is slided in the direction of an arrow mark D, so that a tertiary side cable 8c converted in its moving direction by a guide pulley 7 is slided in the direction of the arrow mark C. Since the tip of the tertiary side cable 8c is locked to a part F in the vicinity of the root of a cylinder part 4, the cylinder part 4 is delivered from an outer cylinder part 3 into the direction of the arrow mark C to complete the preparation of work.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention can be attached to a mobile construction machine such as a crane truck or a rack equipped with a crane, and when operating the crane or the like during work, the vehicle body may fall over. To provide a drive device for an outrigger, which can stabilize the work by extending the legs outward from the vehicle body so as not to cause any trouble, and can be stored so as not to cause any trouble during driving.

[Prior Art] In most cases, hydraulic cylinders are used to extend or store outrigger devices that have conventionally been attached to construction machines such as large crane trucks. However, in relatively small and medium-sized construction machines, there is not enough space to install a hydraulic cylinder, so many of them have a structure in which they are manually extended and stored.

[Problem to be solved by the invention] In an outrigger device such as the above-mentioned type that is manually extended or retracted, operation on soft ground is extremely dangerous because the footing is unstable, and wide type Outriggers have long cylinders, so when they are extended or stowed, the cylinders get bent and do not slide smoothly and are very difficult to operate. Further, hydraulic cylinders naturally have the disadvantage of being high in cost and adding to the weight of the vehicle.

[Means for Solving the Problems] The present invention comprises: an outer cylindrical portion fixed to a chassis portion of a vehicle body such as a crane truck of construction machinery; a cylinder portion slidably housed within the outer cylindrical portion; In an outrigger device, the outrigger device includes adjustable legs that protrude vertically downward from the tip of the outer cylinder, the cable drive being fixed near the base of the outer cylinder and driven by a motor; a cantilever that is pivotally supported at an appropriate position of the outer cylindrical portion near the drive device and whose other end extends into the cylinder portion and has a guide member provided at its tip; a pulley of the cable drive device and the guide pulley; and a cable that is wrapped around in a loop shape, one end of the cable being locked at an appropriate position near the tip of the cylinder part, and the other end being locked at an appropriate position at the base of the cylinder part. structure has been adopted.

Furthermore, the cable is wound around in a loop between the pulley of the cable drive device and the guide member, and an arbitrary position of the loop-shaped cable is locked at an appropriate position near the base of the cylinder part. preferred structure.

[Function] In the outrigger device of the present invention having the above-described structure, when the pulley of the cable drive device fixed near the base of the outer cylindrical portion is rotated in the forward or reverse direction, the connection between the pulley and the outer cylindrical portion is caused. The cantilever is protruded from near the base into the cylinder part, and the guide member is installed at the tip of the cantilever in an almost loop shape. Since the cables are respectively locked at appropriate positions nearby, the cables can be slid to the right or left to extend or retract the cylinder portion of the outrigger.

Furthermore, the cable is routed in a complete loop between the pulley of the drive device and the guide member provided at the tip of the cantilever, and the looped cable is placed at an appropriate position near the base of the cylinder. When the outrigger is locked at an appropriate position, the cable slides to the left or right by rotating the drive device in the forward or reverse direction, allowing the cylinder portion of the outrigger to be extended or retracted.

[Embodiment] Next, an outrigger device for a construction machine according to the present invention will be explained with reference to the drawings.

FIG. 1 is a partially cutaway front view showing one embodiment of the rigger device of the present invention, and FIG. 2 is a partially cutaway front view showing another embodiment different from FIG. 1.

First, in Fig. 1, (1) is an outrigger device in which an outer cylinder part (3) is fixed to a chassis (2) of a crane vehicle, etc., and a sliding plate is attached to the inner periphery of the outer cylinder part (3). A cylinder part (4) is housed in a movable manner. A cable drive device (5) is fixed to the vicinity of the base of the outer cylinder, and one end of a cantilever (6) is pivotally attached. The (1!2) end of the cantilever (6) extends into the cylinder portion (4), and a guide pulley (7) serving as a guide member is rotatably attached to the tip.

The end of the cable (8) is locked at an appropriate position (E) on the distal end side of the cylinder part (4), and the cable drive device (
After being hung around the pulley (9) of 5), (t!2@) is locked at an appropriate position ('') on the root side of the cylinder part (4) via the guide pulley (7). There is.

In the structure as described above, when the pulley (9) is rotated in the direction of A's finger by the cable drive device W (5), the secondary cable (8b) is wound up by the pulley (9) and - The side cable (8a) is sent out in the direction of the C index finger. As mentioned above, the secondary cable (8b) slides in the direction of the D open phase, so the tertiary cable (8C) whose direction of movement is changed by the guide pulley (7) slides in the direction of the C index finger. Therefore, the tip of the tertiary cable (8C) is locked near the base (F) of the cylinder part (4), so the cylinder part (4) is extended from the outer cylinder part (3) in the direction of C's finger. The preparation for work is completed.

Next, when trying to store the cylinder part (4) that has been extended, the pulley (9) is moved by the cable drive device (5).
) in the direction of loss of power B, the - next cable (8a
) is wound up by the pulley (9), so it slides in the D open phase direction, and the secondary cable (8b) is wound up by the pulley (9), and the secondary cable (8b)
Since it is sent out in the direction of the finger, the tertiary cable (8C) slides in the direction of D open phase. Therefore, the primary cable (8a)
The tip of is located at an appropriate position on the tip side of the cylinder portion (4).
Since it is locked in E), the cylinder part (4) can also slide in the D-phase direction and be housed in the outer cylinder part (3).

Next, another embodiment different from that shown in FIG. 1 will be described based on FIG. 2. Note that parts having the same structure as in FIG. 1 will be described using the same reference numerals.

In Fig. 2, (1) is an outrigger device in which an outer part (3) is fixed to a chassis (2) of a crane vehicle, etc., and is slidably attached to the inner circumference of the outer cylinder part (3). A cylinder part (4) is housed therein. A cable drive device (5) is fixed to the vicinity of the base of the outer cylindrical portion, and one end of a cantilever (6) is pivotally attached, and the other end of the cantilever (6) is connected to the cylinder portion ( 4) A guide pulley (7) that extends inward and is a guide member at the tip
is rotatably pivoted.

The cable (8) connects to the pulley (9) of the cable drive device.
and the guide pulley (7), and the cable (8) is locked at an appropriate position near the base of the cylinder portion.

In the above structure, the cable (8) is looped between the pulley (9) and the guide pulley (7), so the cable drive device (5) drives the pulley (9). A When rotated toward the index finger, the cable (
As the pulley (9) winds up the secondary cable (8b) of 8), it slides in the direction of C's finger, and the secondary cable (8a)
) is sent out from the pulley and slides in the D open phase direction. At this time, the cable (8) which is looped around the base ([) of the cylinder part (4) is locked at an appropriate position, so the cylinder part (4) slides in the direction of the C index finger. Then, it is unwound from the outer cylindrical part (3), and preparation for work is completed.

When storing the cylinder part (4) that has been paid out next, the pulley (9) of the cable drive device (5)
When rotated in the direction of B loss, - next side cable (8a)
is wound around the pulley, so it slides in the D open phase direction,
Since the secondary cable (8b) is sent out from the pulley (9), it slides in the direction of C's finger. Therefore, the cylinder part (
4) moves in the D phase-opening direction as 1, so it is stored in the outer cylindrical portion.

[Effects of the Invention] Since the outrigger device for construction machinery of the present invention uses a cable for pulling operation, the structure is extremely simple compared to conventional ones, and it is different from a device using a liquid cylinder. Not only is it extremely light in weight in comparison, but it is also a device that can be provided at a low price, so it has a unique effect that can be used in small construction machines and relatively small trucks equipped with cranes.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing an embodiment of an outrigger device of the present invention, and FIG. 2 is a partially cutaway front view showing an embodiment different from FIG. 1. (Main symbols in the drawings) (1) Near rigger device (2): Chassis (3): Outer cylinder section (4) Niji cylinder section (5): Cable drive device (6): Cantilever (7): Guide member (guide pulley) (8): Cable (9): Pulley

Claims (1)

[Scope of Claims] 1. An outer cylinder part fixed to the chassis part of a vehicle body such as a crane truck of construction equipment, a cylinder part slidably housed in the outer cylinder part, and a vertical part from the tip of the cylinder part. In an outrigger device, the outrigger device includes legs that project downward and are adjustable in height, and includes a cable drive device fixed near the base of the outer cylinder and driven by a motor; A cantilever is pivotally supported at an appropriate position in the outer cylinder part, the other end extends into the cylinder part, and a guide member is attached to the tip of the cantilever, and the cantilever is looped around the pulley of the cable drive device and the guide member. an outrigger for construction machinery, characterized by a structure in which one end of the cable is locked at an appropriate position near the tip of the cylinder part, and the other end is locked at an appropriate position at the base of the cylinder part. Device. 2. The cable is looped between the pulley of the cable drive device and the guide member, and an arbitrary position of the loop-shaped cable is locked at an appropriate position near the base of the cylinder part. The outrigger device for a construction machine according to claim 1, further comprising: an outrigger device for a construction machine;