JPH0437604Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a sand raking device for raking, for example, sand settled at the bottom of a sand settling basin to a predetermined position, and particularly to improving the durability of the device.

[Prior Art] Fig. 3 is an explanatory diagram showing a conventional sand raking device. In the figure, 1 is a sand settling basin, 2, 2 is a pair of upper sprockets provided in the upper space of this sand settling basin, and 3 is a pair of upper sprockets provided in the upper space of this settling basin. A motor or drive means connected to either one of the upper sprockets, 4, 4 a pair of bottom sprockets provided close to each other on the bottom 5 of the sand settling basin 1, 6 a pair of sprockets 2, 2 and the bottom sprocket 4, Conveyor stretched over 4, 7
is a rail provided along the conveyor 6 at the bottom of the sand settling basin 1, and a plurality of scrapers 6a for scraping up sand are attached to the outside of the conveyor 6. In the space above the water surface of the sand settling basin 1, the conveyor 6 is supported by a guide 8 between the sprockets 2, 2.

The conventional sand raking device is configured as described above.
For example, when the motor 3 is driven to rotate, the sprocket 2 rotates, and the conveyor 6 is rotated by the sprocket 2 in the direction shown by the arrow a. A large number of scrapers 6a for scraping up sand are attached to the conveyor 6, and the sand deposited on the bottom of the settling basin 1 by the movement of the conveyor 6 in the direction of the arrow a is scraped up in the direction of the arrow a. It's becoming like that. A recess 9 is provided at a predetermined position of the sand settling basin 1, on the left side in the drawing, and the sand scraped by the scraper 6a is collected in the recess 9.

A sand scraper 10 is provided upward from this recess. The sand scraper 10 consists of upper and lower sprockets 11 and 12, a conveyor 13 with a bucket belt stretched between these sprockets, and a motor 14 that rotates the upper sprocket 11. The sand collected in the recess 9 is scraped up to the upper part by a sand scraper 10 and discharged to the outside of the sand settling basin 1.

[Problems to be solved by the invention] In the conventional sand raking device as described above, the bottom sprockets 4, 4 are submerged in the water of the sand settling basin 1, When used, there are problems in that the bottom sprockets 4, 4 and the conveyor 6 corrode, become stuck with sand, or become damaged.

This invention was made to solve this problem, and provides a sand raking device that can prevent mechanical equipment from wearing out or breaking even if the sand raking device is used for a long period of time. The purpose is to

[Means for Solving the Problems] The sand raking device according to this invention includes a pair of main sprockets provided in the upper space of the sand settling basin, a drive means for rotating at least one of these sprockets, and a drive means for rotationally driving at least one of these sprockets. A master chain stretched between the master sprockets, an arm attached to the master chain, a guide rail that rotatably supports the arm and guides it back and forth on the same route, and a guide rail attached to the bottom of the arm. This problem is solved by rotating the arm and flipping it up by utilizing the difference in height between the main chains on the outbound and return trips.

[Function] In this device, when the upper part of the arm moves on the upper side of the main chain, the middle part of the arm also moves in the same direction, and the scraping member slides on the bottom of the settling basin, and the sand settling basin is closed. Rake up the sand on the bottom of the. Further, when the upper part of the arm moves below the main chain, the arm and the raking member are lifted in a direction away from the sand settling basin, and are moved in the opposite direction in the space above the sand settling basin.

[Embodiment] FIG. 1 is an explanatory diagram showing an embodiment of this invention, and FIG. 2 is a view taken along the - arrow in FIG. 1. In the figure, 1 is a sand settling basin, 2 and 2 are a pair of main sprockets provided above the water surface of this sand settling tank, 3 is a motor connected to one of these main sprockets, and 15
16 is a drive shaft attached to this main chain, 17 is a guide rail provided below the main chain 15 and parallel to the bottom 5, and 18 is this guide. A vertical shaft is slidably attached to the rail, 19 is an upper arm whose upper end is attached to the drive shaft 16 and a lower end is attached to the longitudinal axis 18, and 20 is a lower arm whose upper end is attached to the vertical axis 18. ,
21 is a scraping member attached to the lower part of the lower arm 20. The lower arm 20 is biased in the direction of arrow b. A rail 7 is attached to the bottom 5 of the sand settling basin 1. A recess 9 is provided in a predetermined portion of the sand settling basin 1, on the left side in the drawing.

In the sand raking device constructed as described above, when the motor 3 rotates, the main sprocket 2 rotates in the direction of arrow c, and the main chain 15 moves in the direction of d. An upper arm 19 is attached to the master chain 15 via a drive shaft 16, and when the drive shaft 16 moves in the upper position of the master chain, the lower arm 20 moves in the same direction and moves to the lower part of the lower arm 20. The attached scraping member 21 scrapes the sand deposited on the bottom 5 of the sand settling basin 1 in a predetermined direction, which is to the left in the drawing. The raked sand is collected in the recess 9.

The raked sand is raked up to the upper part by a sand raking machine 10 provided in the recess 9, and then sent to the sand settling basin 1.
It is carried out from the top of the building. The sand scraper 10 is similar to that described in the prior art.

In the above case, the lower arm 20 is the upper arm 19
Since the lower end of the lower arm 20, that is, the raking member 21 collides with a lump of sand on the bottom part 5, the raking member 21 passes while riding on the lump of sand. It turns out.

When the drive shaft 16 comes to the lower position of the main chain, the upper arm 19 and the lower arm 20 are bent in a direction away from the water surface of the settling basin 1 and moved in the direction of arrow e, which is to the right in the drawing.

The device may be movable up and down by means of a lifting device so that it can be completely raised above water when not in use.

In the above case, the guide rail 17 was provided below the main chain 15 and the main sprockets 2, 2, but as shown in FIG.
is installed on the main chain and main sprocket,
A similar operation can be expected even if the ends of the arms 19 and 20 are guided in parallel to the bottom 5. Further, a take-up device may be attached to the main sprockets 2, 2 in consideration of the case where the main chain 15 is extended. The shape of the bottom 5 of the sand settling basin 1 may be curved to correspond to the slack of the main chain 15. In addition, in order to control slack in the main chain 15, the main chain 15 is
A guide member may be attached to the lower part of.

[Effects of the device] As explained above, this device can prevent damage and corrosion of the device by providing the main mechanism above the water surface and allowing the arm and scraping member to be held above the water surface. This has the effect of making inspection easier. In addition, since there are no sprocket wheels in the water, there is less wear, and the raking speed can be made slower when raking and faster when returning, increasing operating speed and increasing the discharge capacity per hour. It has the effect of being able to. Furthermore, unlike conventional bucket carts, the amount of scraping is not restricted by the radius of the sprocket wheel, and the size can be increased, which has the effect of increasing the discharge capacity per hour.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing one embodiment of this invention, Fig. 2 is a view taken along the - arrow in Fig. 1, Fig. 3 is an explanatory diagram of a conventional sand raking device, and Fig. 4 is an explanatory diagram showing an example of this invention. It is an explanatory diagram showing an example of. In the figure, 1 is the sand settling basin, 2 is the main sprocket, 3 is the motor, 5 is the bottom, 7 is the rail, 15 is the main chain, 16 is the drive shaft, 17 is the guide rail, 18 is the vertical movement shaft, and 19 is the upper arm. , 20 is a lower arm, and 21 is a scraping member. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A pair of main sprockets provided in the upper space of the sand settling basin, a driving means for rotationally driving at least one of these sprockets, a main chain stretched between these main sprockets, and an arm attached to the main chain. , a guide rail that rotatably supports this arm and guides it back and forth on the same route, and a scraping member attached to the lower part of this arm, and the difference in height of the main chain on the outbound and return trips is A sand raking device that uses a mechanism to rotate the arm and flip it up.