JPH04115885U - Jacking device for boom-equipped vehicles - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent boom-equipped vehicles from falling over with a simple configuration. [Structure] Auxiliary legs 20 are rotatably provided on the front or rear side of an outer frame 9 that holds the jack 10, and the auxiliary legs 20 are parallel to the front or rear side of the jack 10 when stored. At the same time, when in use, the jack 10 is protruded outward in the vehicle width direction and tilted downward, while the vehicle body is tilted at a certain angle near the auxiliary leg 20 so that the auxiliary leg 20 A detection device 30 is provided to detect when the grounding portion touches the ground.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is applicable to jack devices installed on boom-equipped vehicles such as crane trucks. Regarding.

0002

[Conventional technology]

Conventionally, boom-equipped vehicles, such as crane trucks, have been used to prevent falls during crane operations. Examples of things that can be prevented are the length of the boom, the angle of the boom, and the rotation of the boom. Each detector is equipped with a detector that detects the turning position, the extension length of the outrigger equipped with a jack, etc. Based on the information detected by these detectors, the overturning moment and stability moment are calculated. Calculate the overturning moment and compare the two, and if the overturning moment is greater, then the clay configured to stop the operation.

0003

[Problem that the idea aims to solve]

However, the overturning moment and stability moment cannot be calculated as described above. Compare the two and stop the crane operation when the overturning moment becomes larger. However, there were problems in that the control was complicated and expensive.

0004 In addition, for truck-mounted cranes, the truck is loaded with cargo in the cargo box. In many cases, crane work is carried out under Not only does this change the safety range of the boom, but also the The safe area of the boom also changes considerably depending on the load distribution. For example, heavy work equipment If the machine is placed in the corner of the shipping box, there is a risk of it falling to the side where the machine is placed. The risk increases. However, it is very difficult to understand the load distribution of cargo, and In order to control the operation of the boom by taking this into account, the control becomes complicated and extremely difficult. It was.

[0005]

[Means to solve the problem] The boom-equipped vehicle jacking device of this invention can be extended up and down on both the front and rear sides of the vehicle body. In a boom-equipped vehicle equipped with a jack, the outer frame that holds the jack Auxiliary legs are rotatably provided on the front or rear side of the It is arranged parallel to the front or rear side of the jack, and When in use, the jack is extended outward in the width direction of the vehicle body and tilted downward. On the other hand, when the vehicle body is tilted at a certain angle and the ground contact part of the auxiliary leg touches the ground, A detection device is provided to detect this.

[0006]

[Effect]

When starting work, first extend the jack, touch it to the ground, and then The vehicle body is supported by the brackets. After this, rotate the auxiliary legs from the stored position and jack Place it in a position that extends outward in the vehicle width direction and downward in a tilted state, and fix it in this state. do. As a result, even if the vehicle body is tilted, the auxiliary legs will contact the ground and the vehicle body will roll. In addition to preventing falls, the detection device detects when the auxiliary legs touch the ground, e.g. For example, an alarm is issued to notify the worker.

[0007]

【Example】

An embodiment of the present invention will be described below with reference to the drawings. Note that in this example, the boom mounting The explanation will be given using a truck-mounted crane as an example.

[0008] FIG. 1 shows the general structure of a truck-mounted crane.

[0009] The truck-mounted crane 1 is provided with a cargo box 2a on a vehicle body 2. A swing post 3 is mounted in front of 2a so as to be swingable by a swing motor (not shown). It is. A boom 4 is provided at the upper end of the swing post 3 so as to be able to rise and fall freely. Bu The arm 4 is a multi-stage telescoping type, and can be freely extended and contracted by a telescoping cylinder (not shown). The hoisting cylinder 5 installed between the boom 4 and the swivel post 3 allows for free hoisting. It is configured.

0010 A winch 6 is provided at the base end of the boom 4, and a winch motor (not shown) is installed at the base end of the boom 4. The wire 7 equipped with the hook 7a is wound up or let out by a hook 7a. It is.

[0011] Outriggers 8 (see Fig. 2) are installed on both sides of the front left and right sides of the cargo box 2a of the vehicle body 2. It is provided so that it can be extended to the side of the vehicle body, and it is made to be extendable and retractable to these outriggers 8. Jacks 10 are installed vertically.

0012 As shown in FIG. 2, the jack 10 is fixed to the outrigger 8 via an outer frame 9. It is composed of a main body part 11 and an extensible part 12 provided in the main body part 11 in a freely retractable manner. ing. A grounding part 13 that is grounded on the ground is provided at the lower end of the extendable part 12.

[0013] Auxiliary legs 2 are provided on the front side (or rear side) of the outer frame 9 that holds the jack 10. 0 is provided rotatably around the pivot 20a. The auxiliary legs 20 are retracted. When in use, it is arranged parallel to the front side of the outer frame 9, and when in use. The jack 10 is arranged to protrude outward in the width direction of the vehicle body and to be inclined downward. Ru.

[0014] By providing the auxiliary leg 20 on the front side in this way, the auxiliary leg 20 can be does not protrude outward in the width direction of the vehicle body from the outer frame 9, and is removed from the outer frame 9 only when in use. It is arranged to protrude outward in the body width direction.

[0015] A grounding portion 21 that is in contact with the ground is provided at the tip of the auxiliary leg 20. Grounding part 2 1 is provided with a pin hole (not shown), and a pin 15 is passed through this pin hole to connect the outer frame. By fixing the pin to the 9 side, the auxiliary leg 20 is firmly held in the stored state.

[0016] Further, the auxiliary leg 20 is attached to the base end of the auxiliary leg 20 outwardly in the vehicle width direction of the jack 10. A fixing bracket 22 is fixedly installed to fix the pin in the extended position. Then, fix the fixing bracket 22 and a bracket (not shown) provided on the outer frame 9 with a pin. By setting the position, the auxiliary leg 20 is firmly held in that state.

[0017] Further, a detection device 30 is provided on the grounding portion 21 of the auxiliary leg 20. detection device 30 is when the vehicle body 2 is tilted at a certain angle and the ground contact portion 21 of the auxiliary leg 20 touches the ground. Detect this. Then, the detection device 30 detects when the grounding portion 21 of the auxiliary leg 20 has touched the ground. If it is detected, an alarm (not shown) will issue an alarm to notify the operator, or or operation of the boom in a dangerous direction, e.g., extension of boom 4, overturning of boom 4, tilting of boom 4, etc. It restricts the turning of the boom 4 to the opposite side, the hoisting of the winch 6, etc.

[0018] Next, the operation of the jack device configured as described above will be explained.

[0019] When starting crane work, first extend the extendable part 12 of the jack 10. The grounding part 13 is grounded to the ground to support the vehicle body 2. After this, move the auxiliary legs 20 to the retracted position. 2, tilt the jack 10 outward in the vehicle width direction and downward. The fixing bracket 22 and the bracket of the outer frame 9 are The auxiliary legs 20 are firmly held by fixing them with pins.

[0020] If the vehicle body 2 is tilted during crane work, the ground contact portion of the auxiliary leg 20 21 touches the ground, thereby preventing the vehicle body 2 from falling. In addition, the auxiliary leg 20 When the grounding part 21 touches the ground, the detection device detects this and issues an alarm with the alarm. and notify the operator.

[0021] In addition, if necessary, the detection device can detect the boom and operate it in a dangerous direction, e.g. , extending the boom 4, laying down the boom 4, turning the boom 4 to the tilted side, winch 6 To prevent vehicles from tipping over, the system restricts the winding up of vehicles.

[0022]

[Effect of the idea]

As described above, according to the present invention, when the auxiliary legs are used, the jack By protruding outward in the vehicle width direction and slanting downward, the vehicle body The auxiliary legs can support the vehicle when it tilts, and the simple configuration prevents the vehicle from tipping over. It can be prevented. In addition, the detection device detects when the auxiliary leg touches the ground. This allows you to quickly take measures to improve safety from this dangerous situation, ensuring reliable fall prevention. You can try to stop it. Moreover, auxiliary legs are provided on the front or rear side of the outer frame. As a result, the auxiliary legs protrude outward in the vehicle width direction from the outer frame only when in use. It is safe and does not cause any obstruction when stored.

[Brief explanation of drawings]

FIG. 1 is a side view schematically showing the overall configuration of a truck-mounted crane.

FIG. 2 is a front view showing the jack device.

[Explanation of symbols]

1 Truck-mounted crane 2 Vehicle body 4 Boom 9 Outer frame 10 Jack 20 Auxiliary legs 21 Grounding part 30 Detection device

──────────────────────────────────────────────── ─── Continued from the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display location B66F 9/075 L 7637-3F 9/24 F 7637-3F E02F 9/08 A 9022-2D

Claims (1)

[Scope of utility model registration request] Claim 1: A boom-equipped vehicle that is provided with vertically extendable jacks on both the front and rear sides of the vehicle body, in which auxiliary legs are rotatably provided on the front or rear side of an outer frame that holds the jacks, The auxiliary legs are arranged in parallel along the front or rear side of the jack when stored, and are arranged so as to extend outward in the vehicle width direction of the jack and downward in the vehicle body width direction when in use. 1. A jacking device for a boom-equipped vehicle, comprising a detection device that detects when the auxiliary leg is tilted at a certain angle and the ground contact portion of the auxiliary leg touches the ground.