JPH0952696A - Machine for high lift work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a worker to get on/off a working board by hanging a telescopic ladder, which is formed by connecting a lower stage ladder to an upper stage side ladder in order freely to be telescoped, in one side of the most upper side section of a vertical telescopic post at the most upper stage side ladder. SOLUTION: A lowest stage side ladder 8c of a telescopic ladder 8 is connected to the lower end of a lowest stage side section of a vertical telescopic post 4 freely to be disconnected, and the telescopic ladder 8 is telescoped with the telescopic motion of the vertical telescopic post 4. The telescopic ladder 8 is thereby positioned along the nearly whole area in the longitudinal direction of the vertical telescopic post 4. Consequently, a worker can get on and off a working board 7, which is positioned in a working space, by utilizing this telescopic ladder 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mounts a vertical expansion / contraction post vertically extending on a base through a support mechanism, and has a long floor surface at the lower end of the vertical expansion / contraction post. The present invention relates to an aerial work machine in which one longitudinal end of a workbench is mounted so as to be horizontally swivel-driving so that the workbench can be positioned in a space position lower than the level of the base.

[0002]

2. Description of the Related Art As shown in FIG. 2, a conventional high-altitude working machine of this type includes a vertical telescopic post 4 which extends and contracts downward.
Is vertically attached to the base 1 via the support mechanism A, and one end of the workbench 7 having a long floor surface 7a in the longitudinal direction is attached to the lower end of the vertical expansion / contraction post 4 via the horizontal swing drive device 5. It is configured so that it can be driven to rotate horizontally. The vertical expansion / contraction post 4 is configured by sequentially inserting the lower-stage side sections 4b, 4c into the upper-stage side sections 4a, 4b in a retractable manner, and the uppermost-stage side section 4a of the vertical expansion / contraction post 4 is the support mechanism A. It is attached to the base 1 via.

In FIG. 2, reference numeral 6 denotes a workbench mounting frame extending from one longitudinal end of the workbench 7. The workbench mounting frame 6 is a lower end of the lowermost section 4c of the vertical expansion / contraction post 4. It is attached to the section via a horizontal turning drive device 5 so as to be freely turnable.

When performing work at a high place with the aerial work machine configured as described above, the vertical telescopic post 4 supported by the support mechanism A is telescopically driven and the workbench 7 is horizontally swung to drive the workbench 7. Is moved to an arbitrary space position lower than the level of the base 1, and the work is performed.

In this type of aerial work machine, the base 1 is installed on the deck of a tanker and then the work table 7 is used.
Maintenance inspection work inside the hold of an oil tanker that is used by inserting it into the hold (tank) from the maintenance check opening opened on the deck. After installing the base 1 on any floor of the building, insert the workbench 7 downstairs through a gap such as a beam and use it for maintenance inspection and interior construction work under the building. Maintenance and inspection work of a bridge or an elevated road in which the base 1 is installed on the bridge or the elevated road, and the workbench 7 is inserted downward through the lateral space of the bridge or the elevated road. It is often used for etc.

[0006]

By the way, in this type of aerial work machine, the floor surface 7a of the workbench 7 is lengthened in order to increase the efficiency of work in aerial work. Since the movement range of the work table 7 is large, it takes time and effort to insert the workbench 7 into the work space position, that is, in the hold, downstairs, below the bridge / overpass, or withdraw from the work space position. is there. In particular, in the aerial work machine used for maintenance and inspection work in the hold of the oil tanker described above, the tendency is remarkable because the maintenance and inspection port provided on the deck is relatively small.

On the other hand, in this type of aerial work machine, when the workbench 7 on which the worker boarded is inserted into the work target space position, the worker can get on and off the workbench 7 (when the base 1 is installed). It is not possible to get on and off the existing deck, floor, or bridge / overpass. For this reason, while the work table 7 is positioned at the work target space position and work is being performed at a high place,
When the worker wants to get on and off the work table 7 because of the requirement, the work table 7 must be pulled out from the work target space position one by one, which is one of the factors that reduce the efficiency of work at high places. It was

An object of the present invention is to provide an aerial work machine which allows a worker to get in and out of the workbench 7 while keeping the workbench 7 in the work target space position.

[0009]

In order to achieve the above object, the aerial work machine of the present invention is configured as follows. Work with a long floor surface by vertically mounting the uppermost section 4a of the vertical expansion / contraction post 4 in which the lower section is inserted into the upper section in order so that it can expand and contract vertically, through the support mechanism A to the base 1. One end of the table 7 in the longitudinal direction is attached to the lowermost section 4c of the vertical expansion / contraction post 4 so as to be horizontally swivelable, and the work table 7 is located in a space position lower than the level of the base 1. In the aerial work machine capable of performing the above-mentioned operation, the uppermost ladder of the telescopic ladder in which the lower ladder is sequentially telescopically associated with the upper ladder on one side of the uppermost section 4a of the vertical telescopic post 4. An aerial work machine characterized in that a worker is able to get in and out of the work table by using the telescopic ladder.

[0010]

The aerial work machine of the present invention constructed as described above can use the telescopic ladder to get on and off the worker on and from the work table 7 located at the work space position. Therefore, when a worker gets on or off the worktable 7,
It is no longer necessary to insert and withdraw the workbench into and from the work target space position one by one, and efficient work at high places can be performed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG.
It will be described based on. Since the aerial work machine of the present invention is configured by adding a part of the configuration to the conventional aerial work machine, the reference numerals used in the above description of the prior art are used as synonyms in the following description. It is assumed that the additional components, which are characteristic parts of the aerial work implement according to the present invention, will be described here.

In FIG. 1, 8 is a telescopic ladder,
A lower ladder is sequentially associated with the upper ladders 8a and 8b so as to be extendable and contractible. The uppermost ladder 8a of the telescopic ladder 8 is vertically attached to one side of the uppermost section of the vertical telescopic post 4. Telescopic ladder 8
It has the same number of stages as the vertical expansion / contraction posts 4.

The lowermost ladder 8c of the telescopic ladder 8 is detachably connected to the lower end of the lowermost section 8c of the vertical telescopic post 4, and when the vertical telescopic post 4 is telescopically moved, it is interlocked with this. Then, the telescopic ladder 8 is adapted to expand and contract. For this reason, the telescopic ladder 8 is positioned along substantially the entire longitudinal direction of the vertical telescopic post 4 regardless of the extension state of the vertical telescopic post.

Therefore, the telescopic ladder 8 can be used to allow a worker to get in and out of the work table 7 located in the work space.

In the above embodiment, the lower end of the lowermost ladder 8c of the telescopic ladder is connected 9 to the lowermost section 4c of the vertical telescopic post 4, but the lower end is connected to the vertical telescopic post 4. The lower section 4b may be connected to the lower end. In this case, when the worker gets on and off the workbench 7 located in the work target space position, the lowermost section 4c may be contracted into the lower section 4b. Even in this case, the operator can get on and off the work table 7 located in the work target space position by using the telescopic ladder 8.

Further, in the above embodiment, the connection 9 of the lower end of the lowermost ladder of the telescopic ladder to the lower end of the lower sections 4b and 4c of the vertical telescopic post 4 is made releasable. An appropriate fixing means (not shown) for fixing the retractable ladder to the retractable state is attached to the retractable ladder 8. When the retractable ladder 8 is not needed, the connection 9 is released and the fixing means is used. The telescopic ladder 8 may be always fixed in the contracted state regardless of the telescopic movement of the vertical telescopic post 4. In this way, the retractable ladder 8 fixed in the contracted state does not interfere with normal work at height.

In the aerial work machine of the present invention constructed as described above, the telescopic ladder 8 can be used to allow a worker to get in and out of the work table 7 located in the work space position. . Therefore, when a worker gets on and off the workbench 7, it is not necessary to insert and pull out the workbench into and from the work target space position one by one, and efficient work at a high place can be performed.

In the above-described embodiment, the support mechanism A includes a swivel base 2 mounted on the base 1 so as to be swivel-driving, and a telescopic boom 3 mounted on the swivel base 2 so that its base end portion can be lifted and driven. The vertical telescopic post 4 is attached to the tip of the telescopic boom 3. The vertical telescopic post 4 is attached to the tip of the telescopic boom 3 which can be freely moved up and down in the support mechanism A via a leveling mechanism (not shown) so as to always maintain a vertical posture regardless of the hoisting motion of the telescopic boom 3. Although the example is shown, it is needless to say that the present invention can be applied to an aerial work machine in which the support mechanism A and the structure for attaching the vertical expansion / contraction post 4 to the support mechanism A are as follows.

The support mechanism A comprises a horizontal beam attached to the base 1 so as to extend laterally from the base 2, and the vertical expansion / contraction post 4 is attached to the horizontal beam in the support mechanism A. The structure is mounted so that it can move horizontally. The support mechanism A is mounted on a base 1 so as to be horizontally swivel-driven, and a boom (extendable type) mounted so that its base end is fixed to the swivel 2 and extends laterally. Alternatively, the vertical expansion / contraction post 4 is vertically installed at the tip of the boom in the support mechanism A.

In the above embodiment, the base 1 is composed of a vehicle that can run, but the base 1 is a building to be worked (tanker deck, building flooring, or bridge). The parapet, etc.) may be fixed in place,
Of course, the present invention can be applied to such an aerial work machine.

[0021]

[Effects] The aerial work machine of the present invention configured as described above allows a worker to safely get on and off the workbench 7 while keeping the workbench 7 in the work space. It has an excellent effect that the work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is an explanatory view of an aerial work machine according to the present invention.

FIG. 2 is an explanatory view of a conventional work machine for high places.

[Explanation of symbols]

Base; 1, support mechanism; A, swivel base; 2, boom; 3, vertical telescopic post; 4, vertical telescopic post section; 4a
4c, workbench horizontal swing drive device; 5, workbench mounting frame; 6, workbench 7, floor surface (of workbench); 7a, telescopic ladder; 8, connection;

Claims (7)

[Claims] 1. An uppermost side section 4a of a vertical expansion / contraction post 4 in which a lower side section is inserted in a stretchable manner in an upper side section is vertically attached to a base 1 via a support mechanism A, and a long length is provided. One end in the longitudinal direction of the workbench 7 having a floor is attached to the lowermost section 4c of the vertical telescopic post 4.
It is attached to the workbench 7 so that it can be rotated horizontally.
In an aerial work machine capable of being positioned at a space position lower than the level of the base 1, the upper ladder 8a, 8b is provided on one side of the uppermost section 4a of the vertical expansion / contraction post 4. The lower ladder 8b, 8c
The uppermost ladder 8a of the telescopic ladder 8 which is associated with the telescope is vertically installed, and the telescopic ladder 8 is used to allow a worker to get in and out of the work table 7. Aerial work machine. 2. The lower end of the lowermost ladder 8c of the telescopic ladder 8 is attached to the lower sections 4b and 4c of the vertical telescopic post 4.
The aerial work machine according to claim 1, wherein the telescopic ladder 8 is connected to the lower end of the vertical expansion post 4 so as to expand and contract in association with the expansion and contraction of the vertical expansion post 4. 3. The lower section 4b, 4c of the vertical expansion post 4 at the lower end of the lowermost ladder 8c of the telescopic ladder 8.
The aerial work machine according to claim 2, wherein the connection 9 to the lower end portion is a releasable connection, and a fixing means for fixing the telescopic ladder 8 in a contracted state is attached to the telescopic ladder 8. . 4. The supporting mechanism A comprises a swivel base 2 mounted on a base 1 so as to be swivel-driving, and a telescopic boom 3 having a base end attached to the swivel base 2. The aerial work machine according to any one of claims 1 to 3, wherein the vertical telescopic post 4 is attached to a tip portion of the telescopic boom 3. 5. The aerial work machine according to claim 4, wherein the telescopic boom 3 has a base end portion attached to the swivel base 2 so as to be capable of being raised and lowered. 6. The aerial work machine according to claim 1, wherein the base 1 is a vehicle capable of traveling. 7. The aerial work machine according to claim 1, wherein the base 1 is fixed to an appropriate place of a work target structure.