JPS6057884B2 - Sediment scraper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sediment raking machine for raking up sediment in a water purification plant, etc., and in particular, when running in one pond in the longitudinal direction and laterally moving to the next pond. The present invention relates to a sediment scraper equipped with a device for correcting the skew of the main body of the sediment scraper.

FIG. 1 is a perspective view showing a conventional device of this type. A running wheel 16 running on a running rail 14 and a traversing wheel 20 running on a traversing rail 18 are attached to the raking machine body 12. Four hydraulic cylinders 24 having piston rods 22 are fixed to the transverse end side of the main body 12. Also, on the floor surface, there is a seat 2 in which the piston rod 22 is held in a fixed position.
6 is placed. After completing the raking work for one pond, the sediment raking machine stops at the end of the running rail 14 (the position shown in Fig. 1), pulls up the running wheel 16, lowers the traversing wheel 20, and moves it onto the traversing rail 18. After placing it in the pond, it runs rampant and moves to the next pond.

However, since there is a gap between the flange of the running wheel 16 and the road surface of the running rail 14, the main body 12 may move diagonally when it stops.

In order to return to the normal position from this skewed state, the piston rod 22 reciprocates within four hydraulic cylinders 24 fixed to the main body 12 in four conical seats 26 embedded in the floor surface. suppress. In this way, the thrust force of the hydraulic cylinder 24 is converted into a horizontal force by the conical slope, and the main body 12 is moved horizontally to the center of the conical seat, thereby correcting the main body 12 to its normal position. However, the orthodontic device according to the above-mentioned prior art has 4
It requires a complete hydraulic cylinder 24, and has the disadvantage that the machining of the tip of the piston rod 22 that reciprocates inside the hydraulic cylinder and the material and machining of the conical part of the catch seat 26 require skill, and the parallelism of their mounting positions is required. However, it was necessary to maintain accurate squareness, which resulted in high construction costs.

An object of the present invention is to provide a sediment scraper equipped with a straightening device that has a simple structure and operates smoothly.

The above object of the present invention is to provide two hydraulic cylinders parallel to the floor on the running end side of the main body, provide a stopper on the floor with which the tip of a piston rod that reciprocates within the hydraulic cylinders comes into contact, and When the rod is applied to the stopper and the main body is pushed back to the traveling side, the traversing wheels are placed directly above the traversing rails, and the traveling wheels driven by the long shafts are connected by friction plates. This is achieved by connecting the drive motor via the drive motor to prevent the running wheels from sliding on the rails when pushing back the body.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a plan view showing an embodiment of the sediment scraper of the present invention.

However, parts corresponding to those in FIG. 1 are indicated using the same reference numerals. Two hydraulic cylinders 30 having piston rods 28 are attached to the running end side of the main body 12.

On the other hand, a stopper 32 is fixed to the floor surface at a position where the piston rod 28 comes into contact. Also two running wheels 16
is connected to the long shaft 38 via gears 34 and 36.
This long shaft 38 is connected to a brake 40 and a traveling electric motor 42. 3 and 4 are detailed views of the connection between the long shaft 38 and the running wheels 16.

A gear 36 is rotatably attached to a long shaft 38 supported by bearings 44 and 46.

One or more friction plates 4 are provided on the side surface of this gear 36.
8 are engaged, and similar friction plates 50 are engaged on the long axis 38 opposite to each of the friction plates 48. These friction plates 48, 50 are movable back and forth in the axial direction of the long shaft 38, and are urged by springs 52 so that both friction plates 48, 50 are always in contact with each other. Therefore, the rotational force of the long shaft 38 is transmitted to the gear 36 through the frictional contact between the friction plates 48 and 50.
The rotation of the gear 36 is transmitted to the gear 34, which rotates the running wheel 16 supported on the shaft 54. Next, the operation of this embodiment will be explained. The main body 12 of the raking machine is stopped at a position slightly beyond the travel end position, and is braked by a brake 40 to fix the traveling wheels 16.

In this state, hydraulic pressure is applied to the hydraulic cylinder 30 to extend the piston rod 28 and extend the entire stroke length while bringing it into contact with the fixed stopper 32. By doing so, the running wheels 16 move on the running rails 14 and push the main body back to its normal position. The positional relationship among the stopper 32, the traversing wheel 20, and the traversing rail 18 is determined such that the traversing wheel 20 rides directly on the traversing rail 18 when the piston rod 28 is extended to the full length of the stopper. During the above restoring motion, if a torque greater than the torque generated by the compressive force of the spring 52 is applied to the wheel 16 when the traveling wheel 16 moves, the friction plates 48, 50 will slip.

Therefore, in this case, the traveling wheel 16 rotates independently of the long shaft 38 braked by the brake 40, and sliding movement between the traveling wheel 16 and the traveling rail 14 is prevented.
Note that the other two running wheels do not slide on the running rail 14 because the wheels and shafts are fixed via sliding bearings or rolling bearings. According to this embodiment, two cylinders 3 with piston rods 28
The simple structure of the correction device having the stopper 32 that contacts the piston rod 28 has the effect of reliably correcting the position of the scraper main body 12.

Furthermore, since the rotation of the long shaft 38 is transmitted to the running wheels 16 via the friction plates 48 and 50, an appropriate amount of braking is applied to the running wheels 16, and the sliding between the running wheels 16 and the rail 14 is prevented during straightening. This has the effect of preventing this and smoothly correcting the position. Note that the hydraulic cylinder in this embodiment may be a hydraulic cylinder, and in the case of a small scraper, the same effect can be obtained by combining an electric motor, screw, and nut instead of the hydraulic cylinder and piston rod. I can do it.

Furthermore, it is not necessary for the piston rod to extend its entire stroke length; it is sufficient that the extended strokes of the pair of piston rods are equal. As is clear from the above description, according to the present invention, it is possible to provide a sediment scraper equipped with a straightening device that has a simple structure and operates smoothly.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a conventional sediment scraper, FIG. 2 is a plan view showing an embodiment of the sediment scraper of the present invention, and FIG. 3 is a gear 34 shown in FIG. FIG. 4 is an enlarged view of section A in FIG. 3. 16... Traveling wheel, 28... Zeston rod, 30... Hydraulic cylinder, 32...
Stopper, 34, 36...Gear, 38...
...Long axis, 42...Travel electric motor, 48,50.
...Friction plate, 52... Spring.

Claims (1)

[Claims] 1. In a sediment scraping machine that scrapes sediment that has settled on the bottom of the basin using a scraping plate suspended from a girder that runs in the longitudinal direction of the sediment basin, a piston rod that reciprocates inside is installed on the running end side of the main body. two hydraulic cylinders are provided, a stopper with which the piston rod comes into contact is fixed to the ground, and
A sediment scraper characterized in that a long shaft directly connected to a traveling electric motor and a traveling wheel are connected via a friction plate, and the piston rod is brought into contact with the stopper while extending a certain stroke to straighten the main body. .