JPS6224122B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for raking sediment and floating matter installed in a pond into which sewage and wastewater are introduced, and particularly to a sliding device that is attached to a raking plate and slides on a support rail.

A general device for collecting sediment and floating matter in a pond into which sewage or wastewater is introduced will be explained with reference to FIGS. 1 and 2.

Wheels 2 are rotatably supported and provided symmetrically on both sides of the introduction pond 1 near the bottom and near the water surface at the front and rear (horizontal direction in FIG. 1), respectively. A pair of endlessly connected chains 3 are stretched around this wheel 2 so as to circulate near the pond bottom and near the water surface. A plurality of scrapers 4 are attached to the pair of chains 3 at approximately equal intervals. Further, a pond bottom rail 5, a horizontal rail 6, and a tail rail 7 are provided at the bottom of the introduction pond 1, near just below the water surface, and between the wheel 2 on the tail side (left side in FIG. 1), respectively. These rails 5, 6, and 7 in the pond slidably support a scraper plate 4 attached to the chain 3 via a sliding device 8, which will be described later.

Next, a conventional sliding device 8 will be explained with reference to FIGS. 3 to 8.

The sliding device 8 consists of a bracket 9 made of metal having an L-shaped cross section and relatively high rigidity as shown in FIG. 5, and a metal sliding shoe 13, which will be described later.
It is fixed to the scraper plate 4 via a bracket 9 by means such as a fastener. Therefore, at the front end of the bracket 9 (on the conveying direction side of the scraper plate 4),
A bolt seat 10 is provided in a bulging manner so as to face the rail. Further, on the surface of the bracket 9 facing the rail, a dovetail groove 11 is formed which widens in the direction in which the scraper plate 4 is conveyed. A metal sliding shoe 13 having a dovetail ridge 12 to be fitted therein is fitted into the dovetail groove 11. Further, a fixing bolt 14 is screwed into the bolt seat 10 to prevent the sliding shoe 1 from sliding.
3 (left end in Fig. 5), and slide the sliding shoe 1.
3 is prevented from slipping out to the left in FIG. Note that by removing the fixing bolt 14, the sliding shoe 13
can be extracted. Thus, the sliding shoe 13 comes into contact with the rails 5, 6, 7, supports the scraper plate 4 which rotates together with the chain 3, and slides on the rails 5, 6, 7.

Therefore, the sliding shoe 13 must be replaced frequently due to wear, and the fitting portion between the dovetail groove 11 and the bank 12 must be assembled with high precision. However, conventional products have disadvantages such as corrosive rust caused by sewage and waste water that prevents disassembly and reassembly during replacement, and dust from the sewage and waste water persistently adheres to the product, hindering assembly.

This invention reduces wear on sliding shoes and rails,
It is an object of the present invention to provide a sliding device which makes it easy to disassemble and assemble sliding shoes and eliminates the above-mentioned drawbacks.

This invention provides a metal bracket that can be attached to a scraper plate with a dovetail groove that widens toward the conveying direction of the scraper plate, and a metal bracket that can be fitted into the dovetail groove and faces the bottom surface of the groove. The shoe is characterized in that it has a dovetail-shaped ridge with diagonal protrusions on its surface, and a sliding shoe made of plastically elastic, water-resistant synthetic resin is removably fitted into the dovetail-shaped groove.

The structure of this invention will be explained with reference to drawings of embodiments. 9 to 14 show an embodiment of the present invention.

In the figure, a sliding shoe 16 having a dovetail ridge 15 to be fitted into a dovetail groove 11 of a bracket 9 is shown.
It is removably fitted into the bracket 9. The sliding shoe 16 is made of a synthetic resin (for example, nylon, polyurethane, polyacetal) that has airtight water resistance, plastic elasticity, and lubricity in water. The head of the dovetail embankment 15 (the top surface of Figures 9, 11, 13, and 14,
In other words, the surface opposite to the bottom surface of the dovetail groove 11 is provided with a protrusion 1 that presses against the bottom surface of the dovetail groove 11.
7 are provided to protrude in parallel to the dovetail groove 11 in an oblique direction. Note that the rear end of the sliding shoe 16 (the right end in FIGS. 11 and 14) is engaged with the rear end of the bracket 9 (the end on the side opposite to the conveyance direction of the scraper plate 4, that is, the right end in FIG. 14). A locking piece 18 bent in a hook shape may be provided in a protruding manner.

Next, the operation of the above configuration will be explained.

The sliding shoes 16 made of a synthetic resin with plastic elasticity and lubricating properties in water reduce sliding resistance and wear by using water as a lubricating medium when slidingly contacting the rails 5, 6, and 7. Pigeon-shaped ridge 1 of a sliding shoe that fits into the dovetail-shaped groove 11
5 is freely plastically deformed and tightly fitted over the entire length of the groove even if dust or the like remains in the dovetail groove 11. Also, the ridge 17 on the head of the dovetail embankment 15
is in partial pressure contact with the bottom of the dovetail groove 11 to lock the sliding shoe 16 in the groove, and when the sliding shoe 16 swells in water, its volume is accommodated in the gap between the ridges 17. It is. Even if the locking piece 18 is provided protrudingly, it is easily deformed, so there is no problem in assembling the sliding shoes 16, and when reversing the raking machine, the locking piece 18 can be locked to the rear end of the bracket 9 and slid. It is possible to prevent the shoes 16 from falling off.

As explained above, the present invention provides a sliding shoe to be fitted into a dovetail groove of a metal bracket made of a plastically elastic, water-resistant synthetic resin material, and a diagonal protrusion provided on the head of the dovetail groove. As a result, the protrusion is strongly pressed into the dovetail groove, reducing the sliding resistance of the sliding shoe with the rail and preventing the bracket from separating from the sliding shoe.

[Brief explanation of the drawing]

Figure 1 is a side view showing an example of a general scraping machine.
Fig. 2 is a view taken along arrow A-A in Fig. 1, Fig. 3 is a front view of a bracket of a conventional sliding device, Fig. 4 is a bottom view of Fig. 3, and Fig. 5 is a B of Fig. 3. -B sectional view, 6th
The figure is a rear view of a conventional sliding shoe, FIG. 7 is a plan view of FIG. 6, FIG. 8 is a sectional view taken along line C-C of FIG. 6, and FIG. 9 is a sliding shoe showing an embodiment of the present invention. Front view of shoes, No. 10
The figure is a plan view of Fig. 9, Fig. 11 is a side view of Fig. 9, Fig. 12 is a rear view of Fig. 10, Fig. 13 is a rear view of Fig. 9, and Fig. 14 is a side view of Fig. 9. It is a DD sectional view. 4: raking plate, 9: bracket, 11: dovetail groove,
15: Dovetail embankment, 16: Sliding shoe, 17: Projection.

Claims (1)

[Claims] 1. In a sliding device in which a scraping plate of a sludge scraper is provided in a circulating manner in a settling basin, and sliding shoes are attached to the scraping plate via a bracket so as to be in sliding contact with a rail in the basin, the bracket made of a metal material is A dovetail groove that widens in the direction of travel of the scraper board is provided on the surface facing the rail, and the dovetail groove and the side surface are provided on the back side of the surface that is in sliding contact with the rail and is made of plastic elastic and waterproof synthetic resin. A sliding shoe is provided with a dovetail embankment arranged so as to inscribe the dovetail embankment, and a sliding shoe in which protrusions are arranged on the head of the dovetail embankment to press against the bottom surface of the dovetail groove,
A sliding device for a raking machine, characterized in that it is installed in the dovetail groove.