JP2582226Y2 - Gondola device for work at height mounted with mobile crane - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention is used for construction and maintenance of large structures such as buildings, condominiums, factory buildings, tanks, etc., and is detachably attached to the tip of a telescopic boom of a mobile crane to be installed at a high place. The present invention relates to improvement of a gondola device for performing work.

[0002]

2. Description of the Related Art Heretofore, as this type of device, a device for fixing a bucket at the end of a boom of a truck crane and working at relatively low places such as telephone work and electric work has been developed. However, in a fixed bucket type truck crane, since the bucket is in a fixed state, work such as attachment and detachment of the bucket is omitted, but the size of the fixed bucket is limited to the normal traveling of the truck. Is limited so as not to hinder the operation. That is, it is limited to a truck crane having a relatively small crane weight of about 5 tons and a working range of the boom of about 15 m. For this reason, in high-altitude work cranes such as large truck cranes and rough terrain cranes having a boom work range of 20 m to 50 m, it is necessary to fix buckets, gondola devices, and the like on which a plurality of workers can ride. In addition, it is configured to be freely attachable and detachable so that safe normal traveling is possible when traveling on public roads or long distances.

In the mobile cranes such as the large truck cranes and the rough terrain cranes as described above, the base end of the base end boom of the multi-stage telescopic boom is supported by a revolving body that is rotatably provided on the vehicle. The multistage telescopic boom is raised and lowered by the raising and lowering cylinder. The working range of the boom is, for example, in a rough terrain crane with a crane weight of 20 ton class, as shown in FIG. 5, the working height is 30 m and the working radius is 25 m. The multi-stage telescopic boom is composed of a base end boom, an intermediate boom, and a front end boom, and is configured to be telescopically extendable. A crane hook, a jib for extension, and a gondola device are detachably attached to the tip of the tip boom of the multi-stage telescopic boom, so that work at a high place can be performed by raising and lowering and expanding and contracting the multi-stage telescopic boom.

For traveling on public roads or long distances, the user moves the vehicle in a standard running posture by removing the gondola device, bending the overhanging jib to the boom side, or fixing the crane hook as shown in FIG. It is. For on-site use, first stop the car body in a predetermined position, then extend the outriggers located on the left and right of the front and rear parts of the car body horizontally and downward, and fix the car body on the ground for stability. Aim. Then, the separately sent gondola device is attached and fixed to the distal end boom of the telescopic boom, and when the operator gets on the gondola device and the operator of the crane operation room appropriately operates, the telescopic cylinder, the undulating cylinder, A hydraulic operating device such as a swing motor can be operated to displace the gondola device to a desired high position. The moving operation of the telescopic boom itself involves displacing the gondola device itself to an ultra-high position of 20 m to 50 m as described above. It is performed in cooperation with the people. That is, the boom can be expanded and contracted, raised and lowered, or the boom can be turned by operation from the operation room, and the gondola device can be displaced to a desired position. Further, a cylinder device is provided so that the gondola device itself can be arbitrarily moved in the left-right direction or the up-down direction in order to facilitate work at a high work position.

[0005]

[Problems to be Solved by the Invention] As described above, gondola devices mounted on large truck cranes and rough terrain cranes, etc., which have been conventionally developed, are removed except during work and attached during work. In addition to attaching the gondola device to the tip boom every time,
The drive source of the gondola device itself and the power source of equipment used in the device must be connected to a power line from outside such as the main unit of the rough terrain crane. Has the problem that it takes a long time to attach and remove it. In particular, the connection of the power line is not simply a connection of a single connector, but is an operation requiring skill to connect a plurality of thick power lines by a plurality of workers.

[0006]

Means for Solving the Problems The present invention employs the following means to solve the above problems. The idea of receiving registration is a crane base with a multi-stage telescopic boom fixed to a revolving structure, and a mobile crane equipped with a gondola device for high-place work at the end boom of this telescopic boom that can be freely attached and detached. In a gondola device for working at height of a mold, a cylinder for driving the gondola device itself in a vertical direction and a horizontal direction around a rotation axis is provided in the above-mentioned gondola device, and the driving force of the cylinder is reduced by a driving force of a telescopic boom or the like. Is provided separately in the gondola device.

[0007] With the above configuration, the gondola device itself can be connected to the power line provided on the crane base by using the drive source in the gondola device every time the gondola device is attached or detached. It can be displaced in a predetermined direction. Therefore, the work efficiency at the site can be improved. A battery is used as a drive source to be used. Depending on the size of the gondola device, several batteries can be mounted and charging is possible.

[0008]

First, after stopping the vehicle body at a predetermined position, the outriggers arranged on the left and right sides of the front and rear portions of the vehicle body are extended laterally and downwardly, and the vehicle body is fixed on the ground to stabilize. Then, the connecting portion of the gondola device is attached to and fixed to the tip of the tip boom. In this case, there is no need for complicated connecting work of the power lines as in the related art. Next, when the worker gets into the gondola device and the worker in the crane operation room appropriately operates, the hydraulic operating devices such as the telescopic cylinder, the up-and-down cylinder, and the turning motor are operated by a hydraulic circuit (not shown) to move the gondola device to a desired height. It can be displaced to a position. In the working position at an extremely high altitude, the operator in the gondola device drives the cylinder to move the gondola device arbitrarily in the left-right direction or the up-down direction to make the working position easier.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing a case where a gondola device according to the present invention is mounted on a mobile crane and a telescopic boom is extended and is horizontal. FIG. 2 is a plan view of the gondola device,
3 is a side sectional view taken along the line II-II in FIG. 2, FIG. 4 is a side view of a rough terrain crane serving as a crane base, and FIG. 5 is an explanatory diagram showing an example of an operating range of a boom of the rough terrain crane.

In FIG. 1, reference numeral 1 denotes a rough terrain crane serving as a crane base. A pair of outriggers 2 and 2 are provided in front of and behind the rough terrain crane 1 so as to ensure stability during operation. A revolving unit 4 to which a multi-stage telescopic boom 5 having an operation room 3 is fixed is provided at the center of the rough terrain crane 1 so as to be rotatable.
A crane hook, an overhanging jib, and the like, as well as a gondola device for working at a high place, are detachably provided on a distal end boom 5d of the telescopic boom 5. When moving on a public road or a long distance, as shown in FIG. 4, the gondola device is removed, the overhanging jib is bent to the boom side, and the crane hook is fixed to move in the standard traveling posture. Although the case where the gondola device is mounted on a rough terrain crane as a crane base is shown, it goes without saying that it may be mounted on a large truck crane, crawler crane, or the like.

The multi-stage telescopic boom 5 includes a base end boom 5.
a, the middle booms 5b and 5c, the tip boom 5d, and the boom point 5e, and these booms are telescopically extendable. In the multi-stage telescopic boom 5, the base end of a base end boom 5 a is rotatably provided on the revolving unit 4 of the rough terrain crane 1.
A boom hoist cylinder 6 is disposed between the revolving unit 4 and a substantially middle portion of the base boom 5 a to which the base end is fixed, and the telescopic boom 5 is driven by the driving force of the cylinder 6.
The whole is undulating. A gondola device 7 to be described later is detachably attached to a distal end boom 5d of the telescopic boom 5 fixed to the rough terrain crane 1, and a crane hook 7 'and an overhanging jib 7 "are detachably attached. Is used as

Reference numeral 7 denotes a gondola device.
Is detachably attached to the end boom 5d of the telescopic boom 5, and is roughly divided into a box section, a drive section, and a connection section. One end of the connecting portion 8 of the gondola device 7 is fixed to the box portion 11, and the other end is held by point pins 10, 10 via a fixing portion 9 between the end portion and a boom point 5 e provided on the tip boom 5 d. And fixed.

The box section 11 of the gondola device 7
Three workers can ride and work, each side is about 2
m square, and the walls 11a, 11b,
11c and 12 are formed. One of the walls 12 has a V-shaped concave wall 12a, 1 facing inward.
2b. A shaft portion 13 is formed vertically outside the concave wall portions 12a and 12b, and a rotation shaft 13a that can turn the entire box portion 11 left and right is provided on the upper end side thereof. A side portion of the driving shaft 13a and one end of the connection portion 8 are fixed, and a fulcrum portion 14 where the entire gondola device is displaced is formed. And the concave wall portion 12
a, 12b and one end of the cylinder 8
The box 15 can be moved within a range of 90 degrees in the right or left direction by driving the cylinder 15.

A box 1 is provided at the lower end of the shaft 13.
A rotation shaft 13b is provided, which can be tilted up and down around the fulcrum portion 14 as a whole, and a cylinder 16 is disposed between the rotation shaft 13b and a side portion of the connection portion 8.
By driving the cylinder 16, the box portion 11 can be tilted upward or downward within a range of 90 degrees. Although not shown, the gondola device 7 is provided with an automatic leveling mechanism for automatically driving the cylinder 16 in order to keep the floor surface 11d of the box portion 11 of the gondola device horizontal by following the undulation of the telescopic boom 5. Have been. Therefore, unless the operation mode of the automatic leveling mechanism is released, the floor of the box portion of the gondola device always keeps a horizontal state with respect to the ground portion, and the cylinder 16 is stopped in a predetermined state, and the drive is stopped. It is something you never do.

Reference numeral 17 denotes a concave wall portion 12a of the box portion 11,
The drive source 17 is provided outside of the drive source 12b. The drive source 17 is used as a drive source for driving the cylinders 15 and 16. The drive source 17 used is DC
It uses two batteries of 12V, and several batteries can be mounted depending on the size of the gondola device. In addition, the battery can be charged according to the frequency of use. The connection wiring between the drive source 17 and each of the cylinders 15 and 16 is omitted. The power for driving the gondola device itself is not connected to the power line of the drive source such as the telescopic boom 5 or the like, and the power required for skill in the connection work between the gondola device 7 and the tip boom 5d. The work of connecting the wires can be omitted.

[0016]

[Effects of the Invention] As described above, the present invention comprises a crane base in which a multi-stage telescopic boom is fixed to a revolving structure, and a gondola device for working at heights that is detachably configured at the end boom of the telescopic boom. In a mobile crane-mounted type gondola apparatus for working at heights, a cylinder for driving the gondola apparatus itself in the vertical and horizontal directions around the rotation axis is provided in the above-mentioned gondola apparatus, and the driving force of the cylinder is expanded and contracted. It is provided in the gondola device separately from the driving force of the boom or the like.

Therefore, in the past, in the maintenance of a structure, a work scaffold was provided around the building, but this is no longer necessary. The time required for assembling and disassembling the scaffold is eliminated, and the construction period can be shortened. Also, when needed, we can provide a large work table to the required height,
In addition, since it is not necessary to connect to the power line provided on the crane base every time the gondola device is attached / detached, it is not necessary to have a skilled connection work, and the work efficiency at the site can be improved. Therefore, the gondola device itself can be displaced in a predetermined direction using the drive source in the gondola device.

[Brief description of the drawings]

FIG. 1 is a side view showing a case where a gondola device is mounted on a mobile crane and a telescopic boom is extended and is horizontal.

FIG. 2 is a plan view of the gondola device.

FIG. 3 is a sectional view taken along the line II-II in FIG.

FIG. 4 is a side view of a rough terrain crane serving as a crane base.

FIG. 5 is an explanatory diagram showing an example of an operating range of a boom of the rough terrain crane.

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 Rough terrain crane 3 Operation room 4 Revolving unit 5 Telescopic boom 6 Undulating cylinder 7 Gondola device 8 Connection part 11 Box part 12a, 12b Concave wall part 14 Support point part 15, 16 Cylinder 17 Drive source

Claims (1)

(57) [Scope of request for utility model registration] A crane base having a multi-stage telescopic boom fixed to a revolving structure, and a movable crane-mounted high place comprising a gondola device for working at a high place which is detachably attached to a front end boom of the telescopic boom. In the working gondola device, the gondola device is provided with a cylinder for driving the gondola device itself in the vertical and horizontal directions about the rotation axis, and the drive source of the cylinder is separate from a drive source such as a telescopic boom. A mobile crane-mounted gondola device, which is provided in the gondola device.