JPH03161606A - Dust collector - Google Patents

Abstract

PURPOSE:To improve reliability while lightening a device by disposing a torque sensor between a motor for driving a pinion and a speed reducer, detecting the load of a rake and controlling the operation of the rake. CONSTITUTION:A drive unit pivotally supported by a pinion shaft and a rake arm 72, a lower end of which has a rake 71, are provided. A rake device 7 is introduced to guide rails 61, 62 installed to a rake guide frame 6 by a guide roller 75 mounted to the rake arm 72 and a pinion 73, and lifted and lowered while holding the attitude of the rake device 7. A torque sensor capable of detecting a plurality of step of torque is set up between a motor 77 driving the pinion 73 and a speed reducer, and load at the time of the scraping of the rake 71 is detected and the operation of the rake 71 is controlled. The lowering, biting and lifting of the rake 71 or the clogging, etc. of foreign matters are detected positively, and retrying operation is conducted.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is suitable when the width of the applicable channel is relatively small, and when there is sediment such as earth and sand at the bottom of the screen, it is possible to prevent foreign matter from forming between the screen and the rake. The dust remover detects the load applied to the rake in the event of a jam, etc., and selectively retries or stops operation depending on the load, allowing the rake to operate or stop without damaging the rake. It is something to do. [Prior Art] A dust remover for sterilization is disclosed in Japanese Utility Model Publication No. 58-45288. In this device, the force with which the rake is pressed against the screen steel 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. [Invention tries to solve! ! Problem] In this method, if a foreign object gets caught between the rake and the screen, it will escape under the rake's own weight. However, if there is sediment such as sand at the bottom of the screen, the tip of the rake will hit the pile as it descends, causing excessive force to be applied to the rake. (Means for Solving !!!fi) The present invention was made to achieve the above object, and consists of a drive unit pivotally supported on a pinion shaft and a rake arm equipped with a rake at the lower end. A rake device is equipped with a guide roller and a pinion, and is guided by the guide roller and pinion to a guide rail provided on the rake frame to move up and down while maintaining its strength. The gist is that a torque sensor capable of detecting the torque of the stage is provided, and the rake operation is controlled by detecting the load during rake pumping. An explanation will be given based on an embodiment. In the figure, 1 is the main body of the dust remover of the present invention, and this M remover 1 is installed in the radial 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 installed on the upper extension line of this screen 2, and the residue captured by the screen 2 is scraped off with the rake of the dust remover 1. The dust remover 1 has a rake guide frame 6 supported by support girders 5.5 provided above the waterway, and a rake device that moves up and down along the rake guide frame 6. It consists of 7.

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. Allow device 7 to move up and down. As shown in FIG. 1, this rake guide frame piece includes a first guide rail 6l having a flat loop shape and a second straight guide rail parallel to the straight part of the outer surface of the first guide rail 6l on the screen side. A central guide rail 63 is disposed in the center over the entire length of the first guide rail 61, and a bin rack 64 is provided on the central guide rail 63.

The rake device 517 has two parallel rake arms 72 each having a guide roller 75 fitted to a linear second guide rail 62 at the upper end.
A rake 71 is integrally provided at the lower end of 2, and a connecting rod 73 is horizontally suspended at the center of the rake arm. A bearing 76 is provided at the tip of the shaft 74, a shaft 79 is supported between the opposing wheel bearings 76 and 76, and a pinion 78 is mounted at the end of the shaft 79.
78 is fixed, the pinion 78 is engaged with the pin rack 64, and the end roller portion of the pinion 78 is used as a guide roller, and the pinion 78 is fitted into the flat loop-shaped first guide rail 61. The shaft 79 passes through a case 80, and this case 80 is disposed between opposing bearings 76 and 76 and is pivotally supported.
A motor 77 is disposed inside the case 81, and the drive of the motor 77 drives the shaft 79 via a drive mechanism inside the case 80, so that the pinion is transferred.
At this time, the output of the motor 77 is detected by a sensor 82, which is capable of detecting a plurality of predetermined loads. A bracket 83 protrudes from the case 81 and is locked to the connecting rod 73, whereby the motor case 81. This prevents the case 80 from rotating. Therefore, the motor case 81 and the rake arm 72 are rigidly connected. Next, remove the present invention! The operation of this will be explained.

When the motor 77 is driven, the pinion 78 rotates. This pinion 78 is a flat loop-shaped guide rail 6
The pinion 7 is engaged with a pin rack 64 disposed in the direction of the Japanese yam, and the center portion of the pinion 7 is fitted into the first guide rail 6l. Therefore, pinion. A rake device 7 equipped with a motor moves along a guide rail 6. When this rake device 7 descends, the pinion is fitted and supported on the opposite side of the screen of the first guide rail 6l, so the guide roller of this pinion and the guide roller fitted to the second guide rail 62 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. and pinion 73
When the pinion 73 is moved to the lowest end of the bin rank 64, the pinion 73 moves to the back surface of the pin rack (1111f), and the guide roller of the pinion moves to the screen strip of the first guide rail 6l.This causes the rake device 7 to swing. The rake 71 at the tip of the rake arm comes into contact with the screen 2. At this time, as shown in Figure 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 in this state, the pinion will further rotate. The rake device moves upward along the screen, and the residue caught on the screen is scraped up by the rake, passing through the apron 3 to the outflow trough 4.
discharge to.

However, if there are deposits at the bottom of the screen when the rake is lowered, the rake will come into contact with the deposits and further lowering will be inhibited. In other words, if the rake stops lowering at this position, but the motor is still being driven, an overload greater than the setting will be applied to the motor, resulting in damage to the motor. For this reason, a torque sensor is provided at the motor output position, and when the first stage detection value is reached, the motor is rotated in reverse, and then rotated in the normal direction again to restart the operation. However, even after restarting, if an overload exceeding the set load is applied, the motor will stop and the rake device will stop. The torque sensor has multiple torque settings to detect overload from below when lowering the rake, overload when biting, overload when scraping, etc. ．． [Effects of the Invention] According to the present invention, a torque sensor is installed between the pinion drive motor that raises and lowers the rake and the reducer, detects the load on the rake, and controls the rake operation, so the rake can be lowered with a simple mechanism. In any case, such as when there is jamming, rising, or a foreign object is clogged between the pinion and rack, the torque is reliably and accurately detected, and the first torque detection causes a retry operation of reversing and forward rotation again. If the second torque detection operates, it is possible to correct the overload, and it is also easy to replace the torque detection sensor during reverse rotation. Furthermore, since the rake does not bend, there is no chance of dust getting stuck on it, and it can be installed lightweight, resulting in energy savings.

It has the advantage of being highly reliable since any overload can be detected and retry operation is performed.

[Brief explanation of the drawing]

FIG. 1 is a front view of the entire dust remover, FIG. 2 is a front view of the rake, and FIG. 3 is a side view. 6l is the first guide rail, 62 is the second guide rail, 7
1 is a rake, 72 is a rake arm, 7 is a rake device,
77 is a motor, 82 is a torque sensor. Figure 3 81

Claims (1)

[Claims] (1) Consists of a drive unit supported by a pinion shaft and a rake arm equipped with a rake at the lower end.The rake arm is equipped with a guide roller and pinion, and the guide roller and pinion guide the guide rail provided on the rake frame. In a rake device that moves up and down while maintaining a tilted posture,
A dust remover characterized in that a torque sensor capable of detecting multiple stages of torque is provided between a motor that drives a pinion and a reduction gear to detect the load during rake lifting and control rake operation. .