JPS61282293A - Crane for height work - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a crane for working at high places, and is used for working on the outer wall of a building, the outer wall or inner wall of a ship, etc.

(Prior art) Conventionally, when painting, cleaning, or other work is performed on the outer wall of a building or the outer or inner wall of a ship, scaffolding is erected at the work area, work is carried out via the scaffold, and then the scaffolding is I was trying to dismantle it.

Furthermore, in cases where the area to be worked on is wide, a crane vehicle may be used, and a gondola for work is provided at the tip of a shaft that can be undulated and expanded, and the work may be carried out from the gondola.

Furthermore, when cleaning the outer wall of a building, a gondola was sometimes hung from the roof of the building along the outer wall, and the work was carried out from the gondola.

(Problems to be Solved by the Invention) In the method of assembling the scaffold, it is necessary not only to assemble it but also to dismantle the scaffold when the work is completed, which has the problem of making the construction work large-scale and prolonging the construction period. .

Particularly when working on the inner walls of the ship's hull, methods such as bringing in a crane truck or suspending a gondola cannot be used, so the work must be done by assembling scaffolding, but this method has the problems described above. In addition, because there are reinforcing materials in the inner corners of the hull walls, it is sometimes impossible to install scaffolding close to the wall surface, which causes the problem that necessary work cannot be performed using scaffolding.

Although methods such as the above-mentioned crane truck are effective for working on the inner walls of the hull, there is no suitable equipment that can be carried into the hull.

(Means for Solving the Problems) The crane for high-altitude work of the present invention has a fixed arm and a ballast arm rotatably installed on both sides of a base with wheels. A main shaft configured to be freely configured is installed to be able to rise and fall freely, and a base end portion of an auxiliary shaft configured to be freely extendable and contractible is connected to a distal end portion of the main shaft so as to be rotatable in a horizontal plane and a vertical plane, It is characterized in that a working gondola is installed at the tip of the auxiliary shaft.

The fixed arm and the ballast arm are for ensuring the stability of the truck when raising and extending the main shaft and extending and rotating the auxiliary shaft, and are provided with respect to the wheeled base. Although an appropriate opening angle is set for use, it is desirable that the fixed arm and ballast arm can also be extended in accordance with the elevation angle of the main shaft and the length of extension of the auxiliary shaft.

The main shaft is desirably capable of expanding and contracting in a short period of time. For example, a cylindrical second shaft is provided inside a cylindrical first shaft.
A cylindrical third shaft is fitted inside the second shaft.
A shaft is inserted into the shaft, and a nut provided at the base end of the second shaft is screwed into a threaded rod provided along the center of the first shaft, and the distal end of the first shaft and the base of the third shaft are screwed together. A chain is stretched between the ends, and the chain is meshed with a sprocket rotatably provided at the tip of the second shaft.

In the above configuration, the load is transmitted to the second shaft and the first shaft through the threaded joint between the screw rod and the nut, and there is a risk of the screw rod fully bending during extension, so the inside of the first shaft is , a plate body matching the inner cross-sectional shape of the shaft is slidably fitted, and a connection having a length corresponding to approximately half of the first shaft and shaft is connected between the plate body and the base end of the second shaft. It is desirable that a rod be inserted through the connecting rod so that both ends of the connecting rod can be engaged with the plate or the base of the second shaft.

(Function) According to the crane for high-altitude work configured as described above, by raising and extending the main shaft and determining the amount of extension and rotation angle of the auxiliary shaft, the crane for high-altitude work can be operated at the tip of the auxiliary shaft. Needless to say, the gondola can be placed close to not only vertical walls but also downwardly or upwardly sloping walls, and it is possible to work at heights without using scaffolding as in the past.

In particular, the trolley is composed of a base, a rotatable fixed arm and a ballast arm, and a telescopic main shaft is provided on the trolley so that it can be raised and lowered freely. Since it is configured with a telescopic auxiliary shaft that can rotate freely in horizontal and vertical planes, the entire unit can be folded compactly and can be carried inside the hull and used for work on the hull walls. I can do it.

(Example) Examples of the present invention will be described below with reference to the drawings. 1st
3 to 3 show a crane 1 for high-altitude work according to the present invention, in which a main shaft 3 is installed on one side of a truck 2 so as to be able to rise and fall freely via a horizontal shaft 4. An auxiliary shaft 5 is provided in series, and a working gondola 6 is installed at the tip of the auxiliary shaft 5.

The truck 2 has a fixed arm 9.9 and ballast arms 10, 10 rotatably provided on both sides of a base 8 having wheels 7.7 on its lower surface via vertical bins 11.12, respectively. There is. As shown in FIG. 2, the fixed arm 9 is attached to the outside of the base! The inner cylinder 14 is fitted into the roller 15.1.
The inner cylinder 14 can be expanded and contracted through the inner cylinder 14, and the movement of the base 8 by the wheels 7.7 can be fixed by a handle 17 provided through the tip of the inner cylinder 14. . The ballast arm 10 is also configured by fitting a ballast tank 19 into the arm 18.
9 along arm 18, and ballast arm 1
The length of 0 is expanded or contracted. In addition, water, seawater, etc. are filled into the ballast tank 19 during use.

A screw punch (ball screw) 20 is rotatably installed horizontally on the base 8 as described above, and the end of the screw punch 20 is connected to a motor 21.
It is connected to the rotating shaft of. The ends of the undulating arm 24 are connected to a nut 22 screwed onto the screw punch 20 and a protrusion 23 protruding from one side of the main shaft 3 so as to be able to rotate within a small angle, respectively. Natsu 22 via 21
By moving the main shaft 3 along the screw punch 20, the main shaft 3 is made to undulate around the horizontal axis 4.

The horizontal axis 4 is a bracket 25.2 installed on the base 7.
When the main shaft 3 is raised vertically, the L-shaped angle 26 attached to the base of the main shaft 3 comes into contact with the horizontal member 27 installed on the bracket 25.25, and the main shaft Further rotation of the main shaft 3 is prevented, and by fixing the angle 26 and the cross member 27 with bolts 28, the main shaft 3 can be fixed in a vertical position.

The main shaft 3 includes first shafts 2 each having a rectangular tube shape.
9. The second shaft 30 and the third shaft 31 are fitted into each other. A screw punch (ball screw) 32 is rotatably installed on the central axis of each shaft, and a nut 3 provided at the base end of the second shaft 30 is connected to the screw punch 32.
3 are screwed together. When the bevel gear 35 meshed with the bevel gear 34 fixed to the screw punch 32 is rotated via a drive system consisting of a motor 36 and a reducer 37 installed outside the base of the first shaft 29, the screw punch 32 is rotated. The nut 33 moves, thereby causing the second shaft 30 to connect to the first shaft 2.
It is designed to expand and contract with respect to 9.

On the other hand, a sprocket 39 is rotatably provided on the tip flange 38 of the second shaft 30.
A chain 41 with one end fixed to the tip 7 lange 40 is meshed with the sprocket 39, and the chain 41
The other end is guided to the base end of the third shaft 31 through the gap between the second shaft 30 and the third shaft 31, and is fixed to the base end of the third shaft 31. Therefore, the first shaft 2
When the second shaft 30 is expanded or contracted with respect to the second shaft 30, the third shaft 31 is also expanded or contracted with respect to the second shaft 30. In the diagram, 42.43.44.45 are the first and second
, are guide rollers for the expansion and contraction of the third shaft 29.30.31.

Further, inside the first shaft 29, there is a rectangular lifting plate 4.
A connecting rod 47 is inserted into the base end of the elevating plate 46 and the second shaft 30 as shown in FIG. The connecting rod 47 has approximately half the length of the first shaft 29, and has bent ends so as to engage with the base of the second shaft 30 and the elevating plate 46, respectively. However, when the main shaft 3 is extended, when the second shaft 30 is extended to half the length of the first shaft 29, the respective ends are engaged, and when the main shaft 3 continues to be extended, the elevating plate 46 is attached to the first shaft 29. The elevating plate 46 is positioned approximately in the middle of the first shaft 29 when the second shaft 30 is extended the most.

Next, the auxiliary shaft 5 has an inner shaft 49 on the tip side fitted inside an outer shaft 48 on the base side, so that it can be freely expanded and contracted. A screw punch (ball screw) 50 is rotatably installed on the central axis of the outer shaft 48 , and a nut 51 provided inside the inner shaft 49 is screwed onto the screw punch 50 . By rotating the screw punch 50 via the mounted motor 52, the inner shaft 49
expands and contracts. In the figure, 53 and 54 are guides 0-ler.

The base end of the outer shaft 49 is rotatably connected via a shaft 56 to one side of a pedestal 55 that is rotatably fitted to the base end of the third shaft 31 that constitutes the main shaft 3. ing. A sprocket 57 is fixed to the shaft 56, and the sprocket 57 is connected by a chain 61 to a sprocket 60 that is controlled by a drive system consisting of a motor 58 and a speed reducer 59 mounted on a pedestal 55. A worm gear mechanism 62 consisting of a worm and a worm wheel is interposed between the axis of the sprocket 60 and the output shaft of the reducer 59, so that an arbitrary rotation angle within the vertical plane of the auxiliary shaft 5 can be maintained. It has become. Further, as shown in FIG. 5, a ratchet gear 63 is fixed integrally with the sprocket 57, and the pawl piece 64 is made to face the ratchet gear 63, and the pawl piece 64 is ratcheted via the solenoid 65. The rotation angle of the auxiliary shaft 5 may be maintained by engaging the ratchet of the gear 63.

By driving the motor 58, the auxiliary shaft 5 is rotated in a vertical plane.

A motor 66 is further mounted on the pedestal 55,
a sprocket 67 fixed to the output shaft of the motor 66;
A chain 69 is engaged between sprockets 68 that are fitted and fixed to the tip of the third shaft 31. When the motor 66 is driven, the auxiliary shaft 5 begins to rotate about the main shaft 3 in a horizontal plane (assuming the main shaft is vertical).

According to the crane 1 for working at high places of the above embodiment, the auxiliary shaft 5 is connected to the main shaft 3 as shown by the chain line in FIG.
By placing the main shaft 3 in a state substantially parallel to the main shaft 3 and in a face down state as shown by the chain line in FIG.
The whole thing can be folded into three parts for a compact size.

In this case the fixed arm 9 of the trolley 2 and the ballast arm 1
o are placed close to the sides of the base 8, respectively. It can be moved to a desired location via wheels 7.7 provided on the truck 2, and can also be carried into the interior of the ship.

In use, the main shaft 3 is raised to a vertical position, and the angle 26 is fixed to the crosspiece 27 with bolts 28. Horizontal stresses on the main shaft are opposed by this anchoring of the angle 26 and by the undulating arm 24.

After raising the main shaft 3, the amount of extension of the main shaft 3, the expansion and contraction of the auxiliary shaft 5, and the rotation angles in the vertical plane and in the horizontal plane are determined taking into consideration the work surface, and the work gondola 6 is moved close to the work surface. (Figure 6). At this time, the length and angle of the fixed arm 9 and the ballast arm 10 are determined according to the length of the auxiliary shaft 5 and the rotation angle in the horizontal and vertical planes, so that the main shaft 3 in the vertical state does not fall. Do it like this. It goes without saying that the ballast tank 19 of the ballast arm 10 is filled with water or seawater.

Figure 7 schematically shows the inside of a ship such as an ore carrier or a grain carrier.
The reinforcing members 70, 71, etc. installed at i are inside the hold 72 [as a result of protruding, a downward slanted wall 73 19''t'''N'''' is placed in the inside corner)
4”74”0・In! ! 175C is difficult to perform, but in the crane 1 for high-altitude work according to the embodiment, by adjusting the amount of extension of the auxiliary shaft 5 and the rotation angle in the vertical plane, the work gondola 36 can be moved along the inclined wall. 73
．． 74.

The lengths of the main shaft 3 and the auxiliary shaft 5 are:
Although it is determined by considering the actual working environment, for example, the maximum length of the first, second, and third shafts 29, 30, and 31 and the auxiliary shaft 5 may be set at 5 m each.
If so, it can handle heights of up to 20 m.

It goes without saying that the crane 1 for high-altitude work can also be used for work on the outer wall of a ship or for work on the outer wall of a general building.

(Effects of the Invention) As explained above, according to the present invention, the telescoping main shaft is movable up and down with respect to the cart, and the telescoping auxiliary shaft is movable in the horizontal plane and in the vertical plane with respect to the main shaft. Since it is rotatable, it can be folded compactly, and can be carried into various work environments as well as inside a ship, and has the effect of constructing a crane for high-altitude work that can cover a large work area. Since the truck is rotatably provided with a telescopic fixed arm and a ballast arm, it has the effect of ensuring stability depending on the posture of the crane. Therefore, there is no need to assemble or dismantle scaffolding when working at heights, and the work period can also be shortened.

The main shaft is composed of a first shaft, a second shaft, and a third shaft,
If the third shaft is extended at the same time as the second shaft is extended, it is possible to set the attitude of the crane in a short time. Furthermore, if the elevating plate fitted in the first shaft is raised to the middle part of the first shaft via the second shaft when the second shaft is extended, the vertical movement from the second shaft to the first shaft can be made. This has the effect of preventing the half of the screw screw from transmitting the load.

[Brief explanation of the drawing]

FIG. 1 is a partially longitudinal front view of an embodiment of the invention, FIG. 2 is a partially longitudinal side view, FIG. 3 is a partially plan view, FIG. 4 is a partially enlarged sectional view, and FIG. The figure is a partially enlarged front view, FIG. 6 is a partially longitudinal front view of the embodiment in use, and FIG. 7 is a diagram illustrating the inside of the hull. 1... Crane for high-altitude work 2... Dolly vehicle 3... Main shaft 5
...Auxiliary shaft 6...Working gondola 9...
・Fixed arm 10...Ballast arm 20...
・Screw Rod 22...Nut 29...First shaft 30...Second shaft 31...Third shaft 32...Screw Rod 33...Nut
39...Sprocket 41...Chain 4
6... Lifting plate 50... Screw rod 51...
Nut 57... Sprocket 62... Worm gear mechanism 67. 68... Sprocket patent applicant Hibiya Tsusho Co., Ltd. Akio Okamachi

Claims (1)

[Scope of Claims] 1. A main shaft configured to be extendable and contractible is installed on one side of a cart formed by rotatably installing a fixed arm and a ballast arm on both sides of a wheeled base, A proximal end of an auxiliary shaft configured to be extendable and retractable is connected to the distal end of the main shaft so as to be rotatable in a horizontal plane and a vertical plane, and a working condoler is installed at the distal end of the auxiliary shaft. Crane 2 for working at high places characterized by the following: A crane for working at high places 3 according to claim 1, in which the fixed arm is configured to be extendable and retractable; A patent in which the ballast arm is configured to be extendable and retractable; Crane 4 for high-altitude work according to claim 1 The main shaft includes a cylindrical second shaft fitted inside a cylindrical first shaft, and a cylindrical third shaft fitted inside the second shaft. A nut provided at the proximal end of the second shaft is screwed into a threaded rod provided along the center line of the first shaft, and the distal end of the first shaft and the third A crane for high-altitude work according to claim 1, wherein a chain is stretched between the base ends of the shafts, and the chain is meshed with a sprocket rotatably provided at the distal end of the second shaft. 5 A plate body that matches the inner cross-sectional shape of the first shaft is slidably fitted inside the first shaft, and between the plate body and the base end of the second shaft, there is a A crane for high-altitude work according to claim 4, wherein a connecting rod of half length is inserted, and both ends of the connecting rod can be engaged with the plate or the base of the second shaft.