JPS6253671B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention has an extendable arm that allows a worker who cleans the outer wall surface of a building or window glass to sit on a tower, and allows a cage on which an automatic cleaning machine is mounted to be raised and lowered. Regarding the building cleaning device, the purpose is to prevent the height position of the cage from changing even when the arm extends and contracts.

Conventionally, in the case of building cleaning cages that are hung from the roof of a building so that they can be raised and lowered, the arms that hang the cages are of a tilting type, and the cages are hung from the storage position on the roof along the outer wall of the building. In this case, the cage is always aligned with the building's external wall surface or moved depending on the unevenness of the building's external wall surface, so the elevation angle of the arm is adjusted. However, in this arm elevating type, a large amount of space is required due to the arm elevating and elevating, and since this elevating arm has a rotating arm and a long column that freely supports the upper end of the load side and supports the lower end with a pin joint, it is particularly strong. Sufficient attention must be paid to the strength of the root flange, buckling load, etc., and the center of gravity of the main body is relatively high, which is not preferable for horizontal loads such as earthquake loads. Therefore, in order to improve the above-mentioned points, an extendable arm type has been proposed, but due to its structure, the winding drum is fixed to the main body, and as the arm that suspends and supports the cage expands and contracts, the cage inevitably collapses. moves up and down and simultaneously moves up and down the same length as the arm extension and contraction stroke. Particularly at the start and end of work, it is necessary to maintain the cage height (position) constant regardless of the extension and contraction of the arm. This is necessary to prevent the cage from colliding with the outer wall of the building. For this reason, the up and down of the cage is adjusted manually by pushing a button manually by rotating the take-up drum, but this operation is difficult, and for safety reasons, the arm extension and contraction speed is slow, and the cage lifting and lowering speed is limited by the operation. Due to its nature, it is fast, and the difference in speed is large, making adjustment difficult.

In view of this, the present invention aims to maintain a fixed position of the support height of the cage without changing it even when the arm is extended or retracted, and the adjustment operation can be performed automatically.

The present invention will be explained below based on the illustrated embodiments.

In the figure, B is a part of a building such as a building, and the main body 1 of the building cleaning device is installed on the roof of the building or any arbitrary position, and the arm 2 is horizontally attached to the top of the main body 1. Alternatively, the cage C is provided so as to extend and contract in a nearly horizontal state, and the cage C is suspended via a wire rope W through a sheave provided at the tip of the arm 2, and the winding drum D provided on the main body 1 side is suspended. The cage C is raised and lowered by winding and unwinding the wire rope by rotating in the forward or reverse direction.

This extension and contraction of the arm 2 is performed by sliding it in a horizontal or nearly horizontal state relative to the main body 1. This is done by supporting the arm 2 so that it can freely slide relative to the main body 1 and also support the load applied to the arm. The sliding movement of the arm in the extending and retracting direction is performed by a screw rod method, but may also be performed by a cylinder method, a wire winding method, a link method, or other methods.

The arm 2 is slidably supported at the top of the main body via a guide roller 2a, and the arm 2 is attached to a screw rod 4 supported at the top of the main body parallel to the arm 2 and rotatably via a bearing 3. By screwing together a partially protruding engaging portion and rotating the screw rod 4 in the forward or reverse direction by the drive device 5, the arm 2 can be extended or contracted, that is, slid in a horizontal direction or in a near-horizontal state. It is something that forces you to do something.

Also, in the main body 1, there is a screw rod parallel to the screw rod 4,
A screw rod 6, which is shorter than the rod 4, is rotatably supported, and this screw rod 6 is adapted to the expansion and contraction stroke of the screw rod.
The screw rods are synchronized and driven in the same direction by the drive device 5 or the screw rod rod 4 so that the ratio is 1/2, and a movable guide sheave 7 is supported on the screw rod rod 6, and by forward and reverse rotation of the rod 6. The guide sheave 7 is moved along the rod 6, but the amount of movement is set to be 1/2 of the amount of arm extension and contraction.

The main body 1 is provided with a winding device 8 that winds up a wire rope that suspends the cage so that the cage can be raised and lowered, and also has two fixed guide sheaves 9 and 10 facing the movable guide sheave 7 in a substantially horizontal position, and these fixed guide sheaves. A fixed guide sheave 11 is provided above the sheave 9 and horizontally opposite the sheave 12 provided at the tip of the arm, and a wire lobe W for suspending the cage is fixed at one end to a part of the cage C to form the sheave 12. After passing through the fixed guide sheaves 11, 9 and the movable guide sheave 7 and then the fixed guide sheave 10, the material is wound onto the winding drum D of the winding device via the traverser sheave 13. be.

Therefore, in the building cleaning device constructed as described above, even if the winding drum of the winding device 8 is rotated at a predetermined speed to match the cage lifting speed, when the arm is extended or retracted, the cage Only the arm expands and contracts without changing the height position of the cage, and the cage moves up and down at a predetermined speed except when the arm is expanding or contracting. This means that even if the winding drum is driven at the same speed, the drive device 5 rotates the screw rod 4 when the arm extends and contracts, causing the arm to slide, and the movable guide sheave is moved by a stroke of 1/2 of the amount of arm extension and contraction. Due to the horizontal movement, the wire rope that is wound up or unwound more than the amount of arm expansion/contraction is adjusted by this moving guide sheave part, and only the arm is expanded/contracted while the height of the cage is always maintained at a fixed position without changing. When the arm stops extending and retracting, the wire rope is wound and unwound at a predetermined time, so that the cage is raised and lowered at a set speed.

Although the stroke of the screw rod 6 is set to 1/2 of that of the screw rod 4, this can be changed arbitrarily depending on the arm extension/retraction speed and the cage lifting/lowering speed, and is not limited to 1/2. .

According to the present invention, a movable guide sheave hung on a wire rope that suspends and supports the cage is moved according to the difference between the cage lifting speed and the arm extension/retraction speed to match the cage lifting speed. Since the wire rope is automatically adjusted to take up and unwind at a constant speed,
The cage can extend and contract only the arm without changing the height position, and the work can be done safely without any special operation by the operator. It has the advantage of being able to

[Brief explanation of the drawing]

FIG. 1 is a front view, and FIG. 2 is a side view. B...Building, 1...Main body, 2...Arm, C
... Cage, W ... Wire rope, D ... Winding drum, 2a ... Guide roller, 3 ... Bearing, 4
... Screw rod, 5 ... Drive device, 6 ...
Screw rod, 7... Mobile guide sheave,
8... Winding device, 9, 10, 11... Fixed guide sheave, 12... Sheave, 13... Traverser sheave.

Claims (1)

[Claims] 1. A telescopic building cleaning device with an arm attached to the top of the main body that can be freely runnable on the roof of a building, etc., by which the cage is suspended and supported so that it can be raised and lowered by sliding in a horizontal or nearly horizontal state. At that,
The arm is made to slide and expand and contract by rotating a screw rod placed parallel to the arm using a drive device, and the cage is suspended and supported in accordance with the expansion and contraction of this arm. The guide sheave is moved according to the difference between the cage lifting speed and the arm extension/retraction speed, and the wire rope that is wound and unwound is automatically adjusted at a constant speed that matches the cage lifting speed. A building cleaning device with an extendable arm, characterized in that only the arm can be extended and contracted without changing the height position.