JPH01210516A - dust remover - 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 Field of Application] The present invention is suitable for applications where the width of the waterway is relatively small, and even if there is sediment such as earth and sand at the bottom of the screen, there is no possibility of foreign matter between the screen and the rake. The present invention relates to a dust remover that operates or stops the rake without damaging the rake even if the rake becomes jammed.

[Conventional technology]

This type of dust remover is disclosed in Japanese Utility Model Publication No. 58-45288.

In this device, the force for pressing the rake toward the screen is determined by the sum of the rake's own weight and the spring pressure attached to the rake.

In particular, the rake torque is determined by this spring pressure.

[Problem to be solved by the invention]

In this system, if a foreign object gets caught between the rake and the screen, it will escape under the weight of the rake. However, if there is sediment such as sand at the bottom of the screen, the tip of the rake hits the sediment when it descends, causing an excessive force to act on the rake.

[Means to solve the problem]

The rake arm is L-shaped, an auxiliary arm is provided on the rake arm so as to be bendable and extensible under the action of a tension spring, and a drive section is provided on the rake arm so as to be swingable, and the rake arm and the auxiliary arm are provided with a flat loop shape. A guide roller is provided that is movable along a first guide rail and a linear second guide rail.

〔Example〕

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

In the figure, reference numeral 1 denotes the main body of the dust remover of the present invention, and this dust remover 1 is installed in the width direction of the waterway W and above and upstream of a screen 2 that is arranged in an inclined manner. Then, an apron 3 is arranged on the upper extension line of this screen 2, and the sieve residue captured by the screen 2 is scraped off with the rake of the dust remover l, and then passed through the apron 3 to an outflow trough 4 provided above the waterway.
Let it drain upwards.

The dust remover 1 is comprised of a rake guide frame 6 supported by a support girder 5.5 provided above the waterway, and a rake device 7 that moves up and down along the rake guide frame 6.

The rake guide frame 6 is provided at both sides of the width of the waterway W along the inclination angle of the screen 2 and above the waterway, and has two parallel rake guide frame pieces 6a and 6b at both sides of the screen 2. The rake device 7 moves up and down between the two. These rake guide frame pieces 6a, 6b
As shown in FIG. 1, a flat loop-shaped first guide rail 61 and a linear second guide rail 62 parallel to the straight portion of the outer surface of the first guide rail 61 on the screen side are provided. In addition, a central guide rail 63 is disposed in the center over the entire length of the first guide rail 61, and a pin rack 64 is provided on this central guide rail 63.

The rake device 7 includes an L-shaped rake arm 72 having a rake 71 at one end and a pinion 73 at the other end.
and an auxiliary arm 76 which is pivotally attached to a part of the rake arm 72 so as to be bendable about a shaft 74 and is equipped with a guide roller 75 that is fitted into the linear guide rail 62, and a motor 77 with a brake, and pinion shaft 90 and shaft 81
The rake frame 78 is comprised of an auxiliary arm 76 and a rake frame 78 which are pivotally connected via a spring 79. In addition, the auxiliary arm 76
By the tension spring 79 provided between the and rake frame 78,
Auxiliary arm 76 unless it receives torque exceeding the set value.
The rake arm 72 is made to be in a straight line by the action of the tension spring 790. Therefore, the axis of the rake arm 72 and the auxiliary arm 76 is located at a position slightly apart from the linear position of the rake arm and the auxiliary arm, that is, the rake arm 7
Install bracket 72B protruding from the rake arm at a position slightly closer to the pinion side than the bending position of 2.
72B and a bracket 76B protruding from the side of the tip of the auxiliary arm, and the two brackets 72B and 76B are pivotally connected around a shaft 74 so as to be bendable and extensible. The tension spring 79 is stretched between the guide roller shaft 82 of the auxiliary arm 76 and the bottle shaft 81 provided on the rake frame. In addition,?
The OS is a stopper provided on the rake frame 78 and regulates the position of the rake arm 72 so that it is interlocked with the movement of the rake frame 78. The tension spring also has a built-in sensor (not shown). With this configuration, when a torque exceeding the setting is applied to the rake 71, the rake frame 78 moves in the direction of the arrow shown in FIG. It is designed to be able to bend and swing in the directions of the arrows, and to absorb torque exceeding the set value.

The pinion shaft includes the pinion 73 and the guide roller 8.
0, and this guide roller 80 is fitted between the flat loop-shaped guide rail 61 and the guide rail 63.

Next, the operation of the dust remover of the present invention will be explained.

When the motor 77 is driven, the pinion 73 rotates. This binion 73 is a flat loop-shaped guide rail 6
is engaged with a pin rack 64 arranged in the longitudinal direction of 1,
Moreover, the guide roller 80 is fitted into the first guide rail 61.

It consists of a rake frame 78 equipped with a pinion and a motor, a rake arm 72, and an auxiliary arm 76.

The rake device 7 moves along the guide rail 61. When this rake device 7 descends, since the guide roller 80 is fitted and supported on the opposite side of the screen of the first kite rail 61, the guide roller 80 and the second guide rail 62 are fitted with each other. Due to the relationship with the roller 75, the rake 71 at the tip of the rake arm is spaced apart from the screen 2, and the rake arm and rake descend between the screen and the guide rail 62. When the pinion 73 reaches the bottom end of the bin rack 64, the pinion 73 moves to the back side of the pin rack, and the guide roller 80
moves to the screen side of the first guide rail 61.

As a result, the rake device 7 swings around the guide roller shaft 82, and the rake 71 at the tip of the rake arm comes into contact with the screen 2. At this time, as shown in FIG. 1, if there is no deposit at the bottom of the screen, the rake will come into contact with the bottom of the screen, and the rake arm and auxiliary arm will remain straight due to the action of the tension spring. When the pinion further rotates in this state, the rake device rises along the screen, and the residue caught on the screen is sown by the rake and discharged to the outflow trough 4 via the apron 3.

FIG. 4 shows the normal raking condition of this scum.

However, if there is a deposit at the bottom of the screen when the rake is lowered, the rake will come into contact with the deposit as shown in FIG. 5, and further lowering operation will be inhibited.

That is, at this position, the rake stops lowering, but since the motor is still being driven, the rake frame 78 is swung about the pinion shaft 90 in the direction of the arrow in FIG. 5 by the rotational torque of the motor. At this time, the tension spring is extended by the motor torque, and when the torque reaches a certain level, it is detected by a sensor built into the spring and the operation of the rake device is stopped.
Prevent damage to the rake device. That is, overload is avoided by swinging the drive unit, and if the torque is within the allowable torque, the operation is continued, and when the torque is above the allowable torque, the drive is stopped.

Further, when the rake device is raised, or when a foreign object is caught between the rake and the screen, the rake frame first swings about the pinion shaft 90 due to the rotational torque of the motor, as shown in FIG. However, if a torque exceeding a critical moment that cannot be avoided by the swinging of the drive unit alone is applied, the rake arm tends to bend in the direction of the arrow in FIG.

At this time, the rake arm and the auxiliary arm bend around the axis 74, absorb the torque, detect it with the sensor,
Allow the rake device to continue or stop operation.

〔Effect of the invention〕

According to the present invention, the rake frame is L-shaped, the auxiliary arm is provided on the rake frame so as to be bendable and extensible under the action of a tension spring, and the drive section is provided on the rake arm so as to be swingable, and the rake arm and the auxiliary arm are provided on the rake frame so as to be able to bend and extend. The arm has a flat loop-shaped first guide rail and a straight-shaped second guide rail.
A guide roller that can be moved along the guide rail allows the distance between the screen and the rake to be reduced, and the bending of the rake arm absorbs overload torque to prevent damage to the rake device. It has the advantage of being easy to use.

[Brief explanation of the drawing]

Fig. 1 is a side view, Fig. 2 is a front view, Fig. 3 is a plan view, Fig. 4 is an explanatory diagram showing the raking state during normal operation, and Fig. 5 is an illustration of the situation when there is an obstacle when lowering the rake. FIG. 6 is an explanatory diagram of a state in which there is an obstacle when the rake is raised, and FIG. 7 is an explanatory diagram of the pinion shaft. 61 is a first guide rail, 62 is a second guide rail, 7
2 is a rake arm, 7G is an auxiliary arm, 7 is a rake device, and 8 is a guide roller. Figure 7

Claims (1)

[Claims] (1) The rake arm is L-shaped, an auxiliary arm is provided on the rake arm so as to be bendable and extensible under the action of a tension spring, and a drive section is provided on the rake arm so as to be swingable, and a flat loop is attached to the rake arm and the auxiliary arm. A dust remover comprising a guide roller movable along a linear first guide rail and a linear second guide rail.