JPS6129509Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of an elastic sieve net, and in particular to an array reinforcement structure of a large number of unit plates constituting the elastic sieve net.

In vibrating screening, elastic screens are less noisy than wire screens and have excellent corrosion and wear resistance, and have become widely used in recent years. These elastic screens are manufactured by various methods, but since forming the entire screen to be attached to one screening machine as a single unit is problematic in terms of economy and other factors, a method has been adopted in which a large number of elastic unit plates having the desired mesh are manufactured, and these are arranged and connected vertically and horizontally to obtain one screen. This method requires small molding dies, which is economical, and requires less time for molding. However, there are various types of unit plate shapes and connecting structures. Broadly speaking, there are structures in which elastic elements (unit plates) that are typically bushing-shaped and have a regular polygonal outline corresponding to one mesh are fitted into each hole of a perforated steel plate, for example, to arrange and hold these elements in a checkerboard, tortoiseshell, honeycomb, or other shapes without gaps (JP Patent Publication 1973-1983).
No. 9777, Examined Japanese Utility Model Publication No. 49-5310), and a square unit plate with numerous meshes has grooves running vertically and horizontally along the mesh, and a large number of such unit plates are arranged and preferably welded together at the edges that come into contact with each other, and wire is embedded in the aligned vertical and horizontal grooves to connect and integrate them (Examined Japanese Patent Publication No. 46-36302).

In this case, the above-mentioned bushing method has the disadvantage that the surface area of the elastic material part becomes larger than the mesh of the unit plate, the porosity of the mesh plate becomes extremely small, and the overall weight increases, resulting in a vibration mechanism. The disadvantage is that even when connected to a net, the secondary vibration of the net itself is small, so clogging can easily progress. Therefore, this method is hardly used at present, and expectations are placed on the above-mentioned line or network embedding method. In this second method, it can be said that the problems of reduced porosity and weight increase as in the bushing method do not occur, but there is a problem in the adhesion or compatibility between the wire rod as a reinforcing structure and the sieve unit plate. Because of its small size, it has a fatal flaw that even if adhesive is used, it still tends to peel off during use.

The present invention aims to provide an array reinforcement structure for unit plates in an elastic sieve network that enables strong adhesion between wire rods as reinforcement or tensile structure of the array unit plates and grooves of the unit plates.

Briefly, the present invention is an array reinforcement structure for a plurality of rectangular unit plates constituting an elastic sieve net, and each unit plate has at least one reinforcing strip along the array direction to be reinforced. A groove is formed on the back surface of the unit plate, and the groove is coated with the same material as the unit plate, or resin or rubber that easily adheres to the unit plate. In addition to embedding the wire rope, the coating material is fixed to the inner surface of the groove.

According to this structure, the wire rope is compressed and reinforced by the coating resin, and the coating resin also fits well with the groove surface of the sieve net unit plate, and can be fixed integrally by welding, for example, so that the wire rope is compressed and reinforced by the reinforcing wire rope. Accidents such as plates coming off can be almost completely prevented.

There is also a sieve net whose network structure is directly constructed from resin-coated wire rope, but this requires welding or other means to fix all the intersection points of the network structure, resulting in high manufacturing costs and the mesh deforms due to use. , it is not as good as the sieve mesh made of molded unit plates.

Preferred embodiments will be described below with reference to the drawings.

FIG. 1 is a plan view of a unit plate 1 of an elastic sieve screen, and in this embodiment, a polyurethane screen plate (urethane sieve) having a square size of 300 mm x 300 mm is shown. Unit plate 1 has edges 2 forming the sides of a square
In this case, a large number of square meshes 3 are formed in a, 2b and 2c, 2d, and of the three reinforcing bands 4 shown in the vertical direction of the figure, two on both sides 4a, 4b are A groove 5 shown in FIG. 2 is formed on the back surface so as to traverse this. Assuming that a required number of unit plates 1 are aligned and arranged vertically and horizontally, and adjacent edges are welded together, covered wire ropes 6 are fitted into their grooves 5. The coated wire rope 6 is, for example, made by extruding a core wire 7 made of stainless steel wire SUS304 with a diameter of 2.0 mmφ and covering it with a coating 8 made of polyurethane so that the outer diameter after solidification and shrinkage becomes 4.5 mmφ. Both are inserted into the width groove 5 in a heated state and fixed by being left to cool and solidify.

In the embodiment, a number of unit plates 1 are arranged such that their grooves 5 cross the sieving flow path and constitute a screen 9 as shown in FIG. 3, for example. The screen size in this case is a rectangle with a processing channel width of 210 cm, shown as the long side in Figure 3, and a processing channel length of 105 cm, shown as the short side, and a row of unit plates formed along the cross section of the channel. A, B, C and D
are shifted slightly so that the unit plates do not match each other in each column. Therefore, the unit plates 1 located at both ends of each row A to D are cut to a necessary size from the basic size (30×30 cm ² in this case). Similarly, all unit plates in row D have a width of 15
It was cut into cm. Polyurethane is a thermoplastic resin that softens at about 200℃, and the edges of each unit plate 1 made of this resin material are
By blowing hot air of 200° C. or higher and abutting this edge against a similar edge of an adjacent unit board 1, it can be easily fixed. The covered wire ropes 6 are inserted into respective grooves in the rows A to D of the unit plates 1 whose arrangement is maintained fixed in this manner. During this insertion, the coating resin of the rope 6 and the inner surface of the groove of the unit plate 1 are each softened with hot air. In the screen 9, hook edges 10 shown in FIGS. 3 and 4 are formed at portions corresponding to both side edges of the processing channel. As will be described later, the hook edge 10 consists of a hook connected to the tip of the coated wire rope 6 and a cover plate that covers the arrangement of the hooks. This hook edge 10 is supported by a vibration support mechanism (not shown) of a vibrating sieve machine at its back side which is connected to the back side of the unit plate.
The concave surface formed by the upward hook shape is locked from the outside. This allows the screen to withstand strong tensile loads due to its own weight and the weight of the material to be processed. That is, this tensile load is sufficiently supported by the wire rope whose both ends are fixed to the hook edge 10.

In addition, a backing plate 11 corresponding to the support rim of the vibration support mechanism is fixed to the back surface of the screen 9 so as to intersect with the rope 6, so as to protect the back surface of the unit plate 1 and supplementally support the screen. Furthermore, a bolt insertion hole 12 is formed between the hook edges 10, 10 for fixing to a vibration mechanism as required.

FIG. 5 is a sectional view of the hook edge, and each hook part is made by removing the covering of the wire rope 6 protruding from the edge of the unit plate 1 at the side end, and attaching the exposed core wire 7 to the exposed core wire 7 made of, for example, a stainless steel tube. The hook element 13 is placed on top and crimped to form a triangular cross section (FIG. 6). The hook edge 10 is constructed by sandwiching the entire row of hook elements 13 that protrude sequentially along the side edges of the screen from above and below between folded hook cover plates 14 made of stainless steel, for example, and opening the edges (openings) of the plates 14. It is placed over the edge of the corresponding unit plate 1, fixed with rivets 15, and then curved to have a hook-shaped cross section as shown in FIG.

In this way, the sieve net reinforcing wire rope 6 of the present invention has a core wire 7 exposed at both ends.
It is connected reliably and firmly to the hook edge 10 and is therefore completely locked in the vibration mechanism.

In the above example, two wire ropes were applied to the 30 x 30 cm ² unit board, but if the screen size is small or the load is small, one wire rope may be used, or in the opposite case, three wire ropes may be used. It is also possible to do more than that.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an embodiment of the sieve mesh unit plate having the reinforcing structure of the present invention, Fig. 2 is a longitudinal sectional view drawn through the mesh of the unit plate, and Fig. 3 is a plan view of an embodiment of the sieve mesh unit plate having the reinforcing structure of the present invention. FIG. 4 is a plan view of the structure of one unit of sieve net, FIG. 4 is a cross-sectional view thereof, FIG. 5 is an enlarged sectional view of the edge of the hook of the sieve net, and FIG. 6 is a sectional view of the hook. 1... Sieve mesh unit plate, 3... Sieve mesh, 4
... Reinforcement band, 5 ... Groove, 6 ... Covered wire rope, 7 ... Core wire, 10 ... Hook edge, 13 ... Tube-shaped hook element, 14 ... Hook cover plate.

Claims (1)

[Scope of utility model registration request] An array reinforcement structure for a plurality of rectangular unit plates constituting an elastic sieve net, in which each unit plate is formed with at least one reinforcing band along the array direction to be reinforced, and the unit plates are A groove is formed longitudinally through at least one reinforcing band on the back surface, and a wire rope coated with the same material as the unit plate or resin or rubber that is easily bonded to the unit plate is buried in this groove. 1. An array reinforcement structure of unit plates in an elastic sieve net, characterized in that a coating material and an inner surface of the groove are fixed.