JPS6131061Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a telescoping arm that raises and lowers the rake of a dust remover, for example.

It has been common practice in the past to extend and retract a telescoping arm that is a combination of multiple pipes of different diameters in a slidable manner.However, in the driving method using a cylinder, the piston shafts are connected by movement of the piston shafts. Since the pipe expands and contracts in sequence, it has the disadvantage that the expansion and contraction action is slow.

The present invention solves the above-mentioned drawbacks, and provides a telescoping arm that is easy to assemble and can quickly extend and retract.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in the drawing, the telescopic arm 1 is made up of first, second, and third pipes 11, 12, and 13, and these pipes 11, 12, and 13 are assembled so as to be relatively slidable, and have a minimum diameter. H to the remaining first and second pipes 11 and 12 excluding the third pipe 13.
Groove-shaped materials such as molds and channel types are used.

Also, sprockets 14 and 15 are pivotally supported at the end and tip of the first pipe 11, and the sprockets 1
An endless chain 16 extends between the sprockets 4 and 15, and the sprocket 14 located on the upper side is driven by a reversible switching motor 17.

The end of the second pipe 12 is fixed to one parallel side of the chain 16, which runs toward the end of the first pipe 11 as the motor 17 rotates normally.

Further, sprockets 18 and 19 are pivotally supported at the ends and tips of the second pipe 12, and an endless chain 20 is stretched between the sprockets 18 and 19.
Then, when the second pipe 12 slides in the contraction direction, the third pipe 13 also slides in the same direction. The ends are fixed. That is, one parallel side of the chain 20 is fixed to the arm 21 protruding from the end of the second pipe 12, and as the second pipe 12 slides in the contraction direction, the third pipe 13 is also slid in the same direction. The remaining parallel side of the chain 20 is fixed to an arm 22 protruding from the end of the third pipe 13.

In the illustrated case, a counterweight 23 is fixed to the chain 16 so that when the second pipe 12 is slid in the contraction direction, it moves in the opposite direction. By doing so, the small motor 17 can smoothly slide the arm 1 in the contraction and expansion directions.

In the illustrated case, the arm 1 includes two sets of the first pipe 11, the second pipe 12, and the third pipe 13, and the arms 24, 21, 22,
25 to connect each end to the third pipe 13
Although a dust remover is shown in which a rake claw 27 is provided at the tip of the bar screen 26 to engage with the bar screen 26, it may be used for other purposes as well.

In the figure, 28 is a support shaft to which the end of the first pipe 11 is rotatably attached, 29 is a push-out device that tilts the arm 11 so that the rake claw 27 is removed from the bar screen 26 when the arm 1 is extended and retracted, and 30 is the counterweight 23. This guide rail 30 is attached to the first pipe 11.

The present invention has the above-mentioned configuration, and in order to retract the extending telescoping arm 1, when the chain 16 is run by the operation of the motor 17, the first pipe 11 is moved through the arm 25 fixed to the chain 16. Slide the second pipe 12 to fit inside.

Also, since the sprocket 18, which is integral with the second pipe 12, moves toward the end of the first pipe 11,
The length of the chain 20 from the sprocket 18 to the sprocket 19 is reduced as the second pipe 12 slides.

Therefore, the third pipe 1 is inserted into the second pipe 12.
3 and finally the first pipe 11
The second pipe 12 and the third pipe 13 are contracted inside.

Next, in order to extend the telescopic arm 1, the motor 17 is operated to move the chain 16 in the opposite direction.

As described above, according to the present invention, the first, second, and third pipes are combined so as to be relatively slidable,
Threading the chain over sprockets provided at the end and tip of the first pipe, fixing the chain to the end of the second pipe, and retracting, extending and sliding the second pipe by reversible operation of the motor, In addition, the chain is passed through sprockets provided at the end and the tip of the second pipe, and the chain is fixed at the end of the second pipe and the end of the third pipe, so that the slide direction of the second pipe is adjusted. Since the third pipe is made to slide, the telescopic arm can be quickly extended and contracted.

Also, there is no need to drive each pipe separately and synchronize the timing.

Furthermore, a counterweight is fixed to the chain that hooks the total weight of the second pipe and third pipe so that when the second pipe is slid in the direction of contraction, it moves in the opposite direction, so that the small motor can be used. This allows the arm to smoothly slide in the contraction and extension directions.

[Brief explanation of the drawing]

FIG. 1 is a front view of an arm according to the present invention, and FIG. 2 is a side view of the arm. 1... Telescopic arm, 11, 12, 13... Pipe, 14, 15... Sprocket, 16... Chain, 17... Motor, 18, 19... Sprocket, 20... Endless chain, 21... Arm, 22...Arm, 23...Counterweight.

Claims (1)

[Scope of utility model registration request] a telescoping arm in which first, second, and third pipes using groove-shaped members at least on the side other than the smallest diameter side are combined in a relatively slidable manner; a sprocket pivotally supported on the end and the tip of the first pipe; An endless chain that spans between these sprockets, and a reversible motor that drives the sprocket at the end.
It consists of a sprocket that is pivotally supported at the end and tip of the second pipe, and an endless chain that extends between the sprockets, and the end side of the second pipe is fixed to one side of the parallel part of the chain on the first pipe side. ,
In order that when the second pipe contracts and slides, the third pipe also contracts and slides, the second pipe end is attached to one side of the parallel part of the chain of the second pipe, and the third pipe is attached to the remaining one side.
A telescoping arm with a counterweight fixed to the chain that hooks the total weight of the second pipe and third pipe so that when the end of the pipe is fixed and the second pipe is slid in the direction of contraction, the arm moves in the opposite direction. .