JPH0314518Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> This invention relates to a gondola device in which an arm for hanging a cage extends and retracts, and is mainly used for cleaning and maintenance of building windows. It is installed and used on the rooftop.

<Prior Art> To give an overview of the conventional arm-extending building cleaning device shown in Figures 4-A and 4-B, a roof car 3 that can run on rails 2, 2 laid on the roof 1 of a building is installed. The roof car 3 is equipped with an extrusion arm 5 that can be moved horizontally by an extrusion linear movement device 4, and wires 7, 7 wound around a wire drum 6 are moved through a wire feeding device 8. , fixed guide sheaves 9, 9, and hanging sheaves 10, 10 attached to the tip of the protruding arm 5, and then hanging down to suspend the cage 11.

In addition to mounting the ejection device and the cage lifting device on the roof car 3 that can run on the rails 2, 2 as in this example, depending on the application, the ejection device and the cage lifting device may be mounted on a fixed structure installed at a fixed position. There is also. Although the illustrated ejection linear movement device 4 is shown as an endless chain, appropriate means such as a rotating threaded rod and a piece screwed thereto may be employed. Incidentally, reference numeral 12 is the driving device.

<Problems to be solved by the invention> In the conventional configuration described above, the protruding arm 5 is
When changing from the extended state shown in Figure 4-A to the retracted state shown in Figure 4-B, there is an excess wire length, and the cage 11 is lowered by that amount, or conversely, when pushed out, the cage 11 is pulled up. It brought about results. In this way, it is not at all desirable for the cage 11 to move up and down each time the push-out arm 5 is pushed out or retracted.
Therefore, the purpose of this invention was to eliminate such lifting and lowering of the cage.

<Means for solving the problem> In this invention, an inner pushing arm is movably provided within an outer pushing arm that is movable by a pushing linear motion device, and the inner pushing arm is attached to the outer pushing arm. By meshing the pinion attached to the inner protruding arm with the rack attached to the inner protruding arm and the fixing rack attached to the machine frame, the outer protruding arm can be adjusted to a certain length L.
When moving, the inner push-out arm moves the same length and in the same direction as the outer push-out arm, and the amount of movement of the push-out arm as a whole is 2L. A movable sheave paired with a fixed sheave is installed on the outer protruding arm, and the wire from the wire drum is wound once between both sheaves before reaching the hanging sheave provided at the tip of the inner protruding arm. Close.
By doing this, when the outer extension arm moves by the length L, the wire length of 2L is added to the suspension sheave side or absorbed from the suspension sheave side, and the wire length is not increased as before. This eliminates the need to raise and lower the cage when extending and retracting.

<Example> This invention will be explained below using the example shown in FIG. 1-A and FIG. 1-B.

5a is an outer protruding arm, and 5b is an inner protruding arm. As shown in FIG. 2, the outer pushing arm 5b is provided with guide rollers 13 on both sides thereof, which contact the inner surface of the outer pushing arm 5a. , guide rollers 14 are provided which contact the upper and lower surfaces of the inner pushing arm 5b, respectively, so that the inner pushing arm 5b can smoothly slide within the outer pushing arm 5a. The outer protruding arm 5a also has opposing guide plates 15, 15 fixed to its outer upper and lower parts to form a guiding groove in the longitudinal direction. As shown, the guide rollers 17, 1 attached to the machine frame 16 of the roof car 3, etc.
7, the outer protruding arm 5a is attached to the machine frame 1.
6, it is possible to move smoothly in the longitudinal direction.

The ejection linear motion device 4 itself is no different from the conventional one. As shown in FIG. 3, a pinion 19 is rotatably mounted on the outer protruding arm 5a, which is connected to the device 4 through a connecting fitting 18. 5b is engaged with a rack 20 attached to the lower surface and a fixed rack 21 attached to the machine frame 16, respectively.

The hanging sheaves 10, 10 are attached to the inner protruding arm 5.
Provided at the tip of b. The wires 7, 7 from the wire drum 6 to the hanging sheaves 10, 10 are
Once wrapped around the movable sheave 22 rotatably attached to the fixed sheave 23 and the support arm 24 attached to the outer protruding arm 5a, it is then sent to the hanging sheaves 10, 10. There is. A line connecting the centers of the sheaves 22 and 23 is parallel to the ejection linear motion device 4 and the ejection arms 5a and 5b, respectively.

<Operation> It is assumed that the outer pushing arm 5a and the movable sheave 22 attached to the outer pushing arm 5a move by a length L due to the operation of the pushing linear motion device 4. At this time,
The pinion 19 attached to the outer extension arm 5a is engaged with the fixing rack 21, so that it rotates with a total rotational circumference equal to the length L. pinion 19
is also engaged with the rack 21 of the inner pushing arm 5b, so the inner pushing arm 5b moves by a length L with respect to the outer pushing arm 5a, and the moving direction is the same as the movement of the outer pushing arm 5a. Match the direction. In other words, the amount of movement of the hanging sheaves 10, 10 is 2L. On the other hand, the wire 7 is connected to the moving sheave 2
2 and the fixed sheave 23 before reaching the hanging sheaves 10, 10. Therefore, when the movable sheave 22 approaches the fixed sheave 23 side by a length L, a length of 2L is applied. The wire 7 is replenished on the hanging sheave 10, 10 side, and conversely, when the moving sheave 22 is pulled away from the fixed sheave 23 side by the length L, the wire 7 with a length of 2L is added to the hanging sheave 10, 10. Absorb from the side.

<Effect of the invention> As is clear from the above explanation, the outer and inner ejection arms 5a, 5b are connected by the racks 20, 21 and the pinion 19 mechanism, and the outer ejection arm 5a is connected to the ejection linear motion device 4. The amount of arm movement obtained from the configuration in which the arm is forcibly moved by
A movable sheave 22 paired with a fixed sheave 23 is provided, and the wire 7 from the wire drum 6 is wound once around both sheaves 23 and 22, and then a hanging sheave 10 is provided at the tip of the inner protruding arm 5b. Since the amount of replenishment and absorption of the wire 7 obtained from the configuration that leads to this matches well, the cage 11 can only move in the horizontal direction and no movement in the vertical direction. In addition, the length of the ejection linear motion device 4 can be reduced to half that of the conventional device, which contributes to making the device more compact.

[Brief explanation of the drawing]

Figures 1-A and 1-B are diagrams showing the extended and retracted states of the arm-extending gondola device of this invention, and Figure 2 shows the outer arm and inner arm of Figure 1. A sectional view showing the guide roller of the exit arm,
Fig. 3 is a sectional view showing the rack-pinion mechanism between the outer protruding arm, the inner protruding arm, and the frame, and Fig. 4-A and 4-B are the cross-sectional views of Fig. 1-A and 1-1.
2 is a diagram showing a case of a conventional example corresponding to diagram B. FIG. 4... Linear movement device for ejection, 5a... Outer ejection arm, 5b... Inner ejection arm, 6... Wire drum, 7... Wire, 10... Hanging sheave, 11... Cage, 16... Machine frame, 19...
Pinion, 20...Rack, 21...Fixed rack, 22...Moving sheave, 23...Fixed sheave.

Claims (1)

[Scope of utility model registration request] An inner push-out arm 5b is slidably provided within an outer push-out arm 5a that is movable by the push-out linear motion device 4, and a pinion 19 attached to the outer push-out arm 5a is moved between the inner push-out arms 5b and the pinion 19 attached to the outer push-out arm 5a. The outer protruding arm 5a is provided with a movable sheave 22 that is paired with a fixed sheave 23, and the wire 7 from the wire drum 6 is connected to both sides. This arm-extending gondola device is characterized in that it is wound once around sheaves 23 and 22 and then connected to a hanging sheave 10 provided at the tip of an inner-extending arm 5b.