JP2913290B1 - Boarding equipment for working at height - Google Patents

Abstract

Abstract: [PROBLEMS] To be able to safely and efficiently perform work at a high place.
Provide a riding device for working at heights. In a riding device equipped on a crane vehicle equipped with a telescopic boom, a basket is provided as a loading point provided with a hydraulic device, and the basket is horizontally and vertically positioned near an upper end of an auxiliary boom. The basket is rotatably positioned so that the basket can be rotated in the horizontal and vertical directions by the operation of each hydraulic device by a rider in the basket.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boarding device for working at heights, which is mounted on the tip of a boom of a crane truck and used.

[0002]

2. Description of the Related Art Conventionally, various types of aerial work vehicles have been used. As shown in the present invention, a riding device for aerial work mounted on a crane boom tip and used. Is not found.

[0003]

Conventionally, aerial work vehicles that are conventionally used are mostly used for work on the order of several meters above the ground, and the work range is limited. There are also aerial work vehicles capable of working at higher positions, but they are expensive because of special vehicles, and the number thereof is not large. Therefore, when moving to a work site, the moving distance is large and inefficient. In addition, most of these high-place work vehicles have two-wheel drive vehicles, and therefore have a problem that the work site cannot be easily approached when the work site is on a sloping road or a bad road on a soft ground. The present invention has been invented in order to solve the above-mentioned problems related to the conventional aerial work vehicle, and is provided at the end of the boom of a crane vehicle, so that the conventional vehicle can be used at a work site. The present invention has been developed for the purpose of providing a boarding device for working at a high place, which can be easily approached and has an excellent working range and workability.

[0004]

According to the present invention, a basket having a hydraulic device is positioned at the upper end of an auxiliary boom of a crane vehicle so as to be rotatable in the horizontal and vertical directions. The basket can be rotated in the horizontal and vertical directions by an operation of an operator. That is, in a riding device equipped on a crane vehicle equipped with a telescopic boom, a basket is provided as a riding point equipped with a hydraulic device, and the basket is rotated in the horizontal and vertical directions near the upper end of the auxiliary boom. It is configured so as to be able to rotate the basket in the horizontal and vertical directions by operating each hydraulic device by operation of a passenger in the basket. The present invention is an aerial work platforming apparatus having the above configuration.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to use the present invention, first, a basket and its attached equipment and parts are mounted on the tip of an auxiliary arm located at the tip of a crane boom. A crane equipped with a boarding device according to the present invention is
When not in use, the boom is retracted and positioned parallel to the vehicle body, and the basket is parallel to the boom. When the present invention is used, an operator rides in the basket, and the crane truck operator operates the boom to stand up and the boom extends. At this time, the basket rotates by the operation of the worker in the basket so as to always keep the horizontal level. When the boom is extended and the basket approaches the work location, the boom is stopped and the operator can perform a desired operation from within the basket. The basket also has a horizontal rotation mechanism, and the horizontal position of the basket can be changed as needed. Hydraulic devices are provided inside and outside the basket according to the present invention, and the purpose can be achieved by operating these devices by the operation of an operator.

[0006]

Embodiments of the present invention will be described below. In the figures, reference numerals 1 to 7 denote conventional truck cranes. Reference numeral 1 denotes a crane truck that uses a four-wheel drive system. Reference numeral 2 denotes an up-and-down cylinder for raising and lowering the boom, which is hydraulically controlled. Reference numeral 3 denotes a multi-stage telescopic boom, and reference numeral 4 denotes an outrigger for stabilizing a crane truck during operation. 5
Is a boom head located at the end of the boom, 6 is an auxiliary boom whose lower end is pivotally supported by the boom head, and 7 is a tension rod whose upper end is near the upper end of the auxiliary boom and whose lower end is pivotally supported by the boom head. 10 is an L-shaped bracket that is pivotally supported at the upper end of the auxiliary boom, 11 is a flat link A whose one end is pivotally supported near the upper end of the auxiliary boom, and 12 has the same shape as the link A and is coaxial with the link A. One end of the link B is pivotally supported, and the other end is a link B that is pivotally supported near the upper end of the bracket. Numeral 13 denotes an adjusting cylinder driven by hydraulic pressure, the lower end of which is rotatably supported at an appropriate position on the upper surface of the auxiliary boom, and the end of the cylinder shaft which is rotatably supported coaxially with the supporting portions of the links A and B. Reference numeral 14 denotes a swing bearing, which is provided at an appropriate position on the upper surface of the bracket, and the lower portion of the basket 15 is located on the swing bearing. This basket is a basket-like body having an open top and a bottom formed by a frame portion of a steel pipe, and its front portion is formed in a square shape and its rear portion is formed in an arc shape. Reference numeral 16 denotes a battery case attached to the lower surface of the front part of the basket, and 17 denotes an oil tank provided on the upper part of the rear side surface of the basket. The above is the mechanical components of the present invention and related devices. The brackets, links, tension rods, and pivoting support points of the adjusting cylinder are pivotally supported by appropriately using a supporting member, and two tension rods, links A and B are used as one set.

Next, the operation of each hydraulic device will be described.
In FIG. 5, reference numeral 20 denotes an electric motor, and reference numeral 21 denotes a pump driven by the electric motor. (A) In the case of vertical rotation of the basket: The electric motor and the solenoid valve 22 operate when the switch is turned on by setting the switch on the operation panel. The oil sucked by the pump 21 from the oil tank 17 passes through the pipeline and flows into the solenoid valve 22 via the pipeline. If the adjustment cylinder is selected to extend the shaft, the cylinder passes through the pipe, flows through the throttle check valve 24, flows into the cylinder from the pipe, and extends the cylinder shaft. At this time, the gas passes through the pilot check valve 26. This pilot check valve is a pair of two check valves set in association with each other. To the other valve to allow oil to escape and flow into the pipeline. Therefore, the oil that has moved inside the cylinder passes through the other valve, passes through the line, line (15), passes through the solenoid valve 22, passes through line (14), line (13), and enters the tank. I will return. Also, when the shortening side of the cylinder shaft is selected by the switch setting, the oil flowing into the solenoid valve 22 from the pipe enters the cylinder via the pipe (15) and the pipe, and the electromagnetic force is transmitted from the pipe and the pipe to the solenoid. The flow returns to the valve 22, and returns to the tank via the line (14) and the line (13). The throttle check valves 24 and 25 are for adjusting the moving speed of the cylinder shaft by making the passing speed variable depending on the oil passing direction. (B) When the basket is rotated in the horizontal direction: When the switch is selected and the switch is turned on, the electric motor and the solenoid valve 23 are turned on.
Operates. The oil sucked by the pump flows into the solenoid valve 23 through the pipe. When the clockwise rotation of the hydraulic motor is set as viewed from above, it flows into the hydraulic motor 29 via the line (11), and flows from the line (10) through the solenoid valve 23 to the line (12). Return to the tank through road (13). When rotation in the opposite direction is set, the pipeline, the pipeline (10), the pipeline (11), the pipeline (12), and the pipeline (13)
And return to the tank. The rotation speed can be adjusted using the above-described throttle check valve. The above is the description of the function of the hydraulic device when the basket is rotated in the horizontal and vertical directions.

Although the basic functions have been described above, in actual use, an automatic control system using a sensor is used for the vertical rotation of the basket in order to improve workability and safety. In this system, a horizontal sensing sensor is provided in a basket, and a signal from the sensor is processed by a control circuit and transmitted to a hydraulic device to automatically control expansion and contraction of an adjusting cylinder shaft. According to this method, the basket can be automatically kept horizontal in accordance with the rising angle of the boom. The adjusting cylinder 13 is involved in the vertical rotation of the basket. That is, when the end of the cylinder shaft is extended, the link A pivots about the shaft support portion on the auxiliary boom side, but this rotation is transmitted to the link B, and pivots the bracket and the basket downward. When the end of the cylinder shaft contracts, the basket rotates in the opposite direction, and the basket rotates upward. Therefore, the basket can be turned up and down by the expansion and contraction of the cylinder shaft. Hydraulic oil is supplied to the adjusting cylinder from a hydraulic device provided in the basket. The bracket 10 and the basket 15 are connected via a swivel bearing 14, which is connected to a hydraulic motor 29. Therefore, the basket can be rotated in the horizontal direction by the rotation of the hydraulic motor. The above hydraulic motor, hydraulic pump and solenoid valve are operated by the battery attached to the basket.

In this embodiment, a manual pump is provided so that the adjusting cylinder can be operated manually by switching the handle. This is provided as an emergency measure in case the battery as the main power supply stops operating. In this manual operation, when the switch is set to the manual side and the manual pump 31 is operated, the oil in the tank is removed from the pipeline ▲ 16.
▼, the pipe 21 passes through the switching handle 30 via the check valve 32. When this handle is set on the cylinder shaft extension side, it flows into the adjusting cylinder 13 through the pipe, passes through the pipe, the pipe, and again passes through the switching handle to the pipe (19).
Return to the tank. When the handle is set to the cylinder shaft shortening side, the handle passes through the pipe, the pipe, the pipe, and the pipe (19), and returns into the tank. It should be noted that the manual pump is of a dual type for high pressure and low pressure, and is used by switching according to the hydraulic pressure level. In addition, a relief valve is disposed at an appropriate position in the pipeline to prevent damage to each device and the like.

Although the embodiment of the present invention has been described above, in this embodiment, the position in the vertical direction of the basket can be controlled manually, and the safety of the worker is taken into consideration. Although a general aerial work vehicle does not have a function of changing the horizontal position of an operator's boarding portion, the present invention can change the horizontal position of the basket by an operator's operation, and the A device can be obtained. And it is versatile because it is used by mounting it on a general-purpose crane truck,
If a four-wheel drive crane vehicle is used, it is possible to work close to places that are difficult to approach with conventional vehicles.
As described above, the present invention enables an efficient work at a high place.

[0011]

According to the present invention, a conventional crane vehicle is used to move a basket to a high place, and the basket can be rotated in the horizontal and vertical directions. It can be carried out. In addition, if a four-wheel drive vehicle is used, a useful device that can be used on a sloped ground or a soft ground to perform high-altitude work can be provided.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a use state of the present invention.

FIG. 2 is an explanatory view of a main part mechanism in a side view of the present invention (when the boom is standing).

FIG. 3 is an explanatory view of a main part mechanism in a side view of the present invention (when the boom is not upright).

FIG. 4 is an explanatory view of a main part mechanism in plan view of the present invention (when the boom is standing).

FIG. 5 is a hydraulic equipment / pipe system diagram of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crane truck 2 Undulating cylinder 3 Boom 4 Outrigger 5 Boom head 6 Auxiliary boom 7 Tension rod 10 Bracket 11 Link A 12 Link B 13 Adjustment cylinder 14 Swivel bearing 15 Basket 16 Battery case 17 Oil tank 20 Electric motor 21 Pump 22, 23 Electromagnetic Valves 24, 25, 27, 28 Throttle check valve 26 Pilot check valve 29 Hydraulic motor 30 Switching handle 31 Manual pump 34, 35, 36, 37 Relief valve

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B66F 9/00-11/04

Claims (1)

(57) [Claims] 1. A boarding device to be mounted on a crane vehicle equipped with a telescopic boom and used, wherein a basket as a boarding point provided with a hydraulic device is provided, and the basket is positioned in the horizontal and vertical directions near an upper end of an auxiliary boom. The basket can be turned horizontally and vertically by the operation of each hydraulic device by the operation of the occupant in the basket.
The basket can be rotated vertically by a dynamic pump.
A riding device for working at heights, characterized by being constituted .