JPH05123654A - Screen net for vibrating screen - Google Patents

Abstract

PURPOSE:To provide a screen net for a vibrating screen which is easily stretched all over the screen surface with uniform tension in the vibrating screen and does not cause a crack at the opening at the time of stretching. CONSTITUTION:Ring members made of metal are stuck on the underside of a screen net face standing in a row in an opening 3a of the screen net 3 and the periphery part of the screen net 3 is set in a rectangular frame member 3b in the shape of a closed loop with the prescribed tension applied.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a sieving net for a vibrating sieving machine.

[0002]

2. Description of the Related Art In Japanese Patent Application Laid-Open No. 2-99174, a trough on which a sieve mesh is stretched is vibrated to transfer the material on the sieve mesh.
A plurality of sieving net vibrating drive units for applying a vibrating force to a rod-shaped member extending in a direction substantially perpendicular to the sieving net are stretched around both edges of the trough and attached to a fixed mounting plate.
The lower end of the rod-shaped member is fixed to a sieving net, and when the drive unit is driven, the rod-shaped member vibrates in the axial direction thereof, and the sieving net attached to the lower end of the rod-shaped member vibrates to make the sieving net. This is to improve the sieving efficiency of the above material, but when replacing the sieving net with a new sieving net, not only the mounting plate but also the lower end of the rod-shaped member of the sieving net vibration drive unit fixed to this The bolts, etc., which are the means for fixing the parts and the sieve mesh, must be removed. Since there are multiple sieve mesh vibrating drives, all of these must be removed, and the sieve mesh must be replaced with a new one.
The replacement work is very troublesome as described above.

In view of the above problems, the applicant of the present invention, while vibrating a rod-shaped member extending in a direction perpendicular to the sieve net to improve the sieving efficiency, makes it much easier to replace the sieve net than before. For the purpose of providing a vibrating sieving apparatus capable of performing the above-mentioned operation, the material is transferred on the sieving net by inclining and / or vibrating the trough on which the sieving net is stretched. In a vibrating and sieving apparatus in which at least one sieving mesh vibrating drive unit for imparting a vibrating force to a rod-shaped member extending in a vertical direction is supported by the frame body, an opening formed by the rod-shaped member on a bottom wall of the trough is provided. Insert into
The tip end is fixed to the sieve mesh, and the lower end is connected to the casing via an elastic member in a casing fixed to the bottom wall of the frame, and the rod-shaped member is axially arranged in the casing. We proposed a vibrating and sieving device characterized by arranging a vibrating mechanism to vibrate (Patent application 2
-299498).

Therefore, also in the sieving net in the vibrating sieving machine described in the above-mentioned Japanese Patent Laid-Open No. 2-99174, and in order to improve the sieving sieving machine, the sieving net for the vibrating sieving machine proposed by the present applicant is proposed. Also, the lower end or the upper end of the rod-shaped member for vibrating the sieving net must be fixed to the sieving net.For this reason, the round end for inserting the tip of this rod-like member into the sieving net. Holes must be formed. However, in the case of tensioning so that a desired tension is applied in the width direction by the tension mechanism provided in the trough for stretching such a sieve net,
In addition to being unable to apply the desired tension on the widthwise line passing through the round hole, breakage or cracks often occurred at the peripheral edge of the round hole in some cases. In this case, not only the desired sieving efficiency is not obtained, but also the upper sieving material may fall down as a lower sieving material in some cases.

In view of the above-mentioned problems, the present applicant has also previously used a sieving net in a vibrating sieving machine in which the sieving efficiency is improved by directly vibrating the sieving net with a rod-shaped member. Formed on the mesh surface for the purpose of providing a sieving net for a vibrating sieving machine which can be stretched on a trough by applying a desired tension and in which the upper material of the sieving does not become the lower material of the sieving machine. A sieving net for a vibrating sieving machine is proposed in which a metal annular member having a circular opening and a central hole having substantially the same diameter is aligned with the opening and adhered to the upper surface or the lower surface of the mesh surface ( Japanese Patent Application No. 3-41094).

FIG. 8 shows an embodiment thereof. In the figure, the mounting members 42 bent in a V shape are formed on both side edges of the sieving net 3.
a and 42b are attached to the pair of holding members 90a and 90b.
Extend along the longitudinal direction of the trough 2, and the upper ends 41a and 41b thereof are elastically pressed against the inner wall of the trough 2. As shown in FIG. 8, the mounting members 42a and 42b are engaged with the lower end portions of the holding members 90, and the holding members 90a and 9b.
Bolts 43a, 43b are inserted through the holes formed in the vertical plate portion of 0b, and this is further inserted through the opening of the side wall portion 2b of the trough 2, and the screw portions of the bolts 43a, 43b are replaced by springs 44a, 44b. After the openings of the spring receiving members 45a and 45b are inserted and the nuts 46a and 46b are screwed and tightened, the sieving net 3 is attached to the trough 2 under tension with a tension corresponding to the compression force of the springs 44a and 44b. It is like this.

As shown in FIG. 9, since the metal annular member 100 having the opening 100a aligned with the opening 3a formed in the sieving net 3 is attached to the lower surface of the sieving net 3, it is strained as described above. Even if the trough 2 is attached to the trough 2, the original sieving action can be performed without cracks in the vicinity of the opening 3a. However, as shown in FIG. Nuts 46a, 46 that are screwed to 43a, 43b
The tightening force of b must be adjusted. Further, since the bolts 43a and 43b and the nuts 46a and 46b are provided at a plurality of positions on both side surfaces of the trough 2, the tension adjusting work is very troublesome and it is difficult to uniformly adjust the tension. is there.

[0008]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above problems, and is to be attached to a trough with a predetermined tension while maintaining the effect of the sieving net for a vibrating sieving machine previously developed by the present applicant. It is an object of the present invention to provide a sieving net for a vibrating sieving machine that is easy to perform.

[0009]

The above object is to arrange a metal annular member having a central hole having substantially the same diameter as a circular opening formed in the mesh surface in the opening so as to align the upper surface of the mesh surface. Alternatively, it is achieved by a sieving net for a vibrating sieving machine, which is characterized in that it is adhered to the lower surface, and a predetermined tension is applied to the net surface to fix it to the closed loop frame at the peripheral edge.

[0010]

[Operation] Since a fixed tension is applied to the closed loop-shaped frame and it is fixed to the peripheral edge of the sieving net, there is no need to adjust the tension at all, and the assembly work of the vibration sieving machine is simple and The sieving efficiency can be made uniform.

Further, since an annular metal member having a center hole having a diameter substantially the same as that of the circular opening formed in the sieving mesh is adhered to the upper surface or the lower surface of the sieving mesh, such a sieving mesh is used. When the net is applied to the frame body so as to obtain a desired tension in the width direction of the net, for example, not only on other net surfaces but also on the line in the width direction of the sieve net passing through the opening, The tension can be set so that the desired tension can be obtained not only when the screen is made of metal wire, but also when the screen is made of a material having a lower strength than metal such as nylon. When applied, it does not cause cracks in the vicinity of the holes of the sieve screen, for example, for the insertion of the rod-like members of the sieve screen, and therefore the type of the type in which the sieve screen is vibrated directly When applied to a dynamic sieving machine, the upper material of the sieve does not become the lower material of the sieve, and it is stretched by applying a desired tension over the entire surface of the sieve mesh, so the sieving efficiency can be greatly improved compared to the past. ..

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A vibrating and sieving apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a vibrating and sieving apparatus according to an embodiment of the present invention, which is designated by 1 as a whole, and a trough 2 is covered with a sieving net 3 so that the trough 2 is covered with a cover 201. In FIG. 1, a sieve upper material discharge port 4 and a sieve lower material discharge port 5 are formed at the right end portion of the trough 2, and a sieve material supply port 6 is formed at the left end portion.
A vibration drive unit mounting plate 7 is integrally formed on the bottom wall of the trough 2, and a pair of known vibration motors 8a are provided at the rear end of the vibration drive unit mounting plate 7.
8b is fixed.

The trough 2 is a pair of front and rear columns 9a,
Anti-vibration springs 11, 11, 11, 1 on 9b, 10a, 10b
It is supported through 1. Further, five sieve mesh vibration drive parts 12 are attached to the bottom wall of the trough 2 in this embodiment as shown in FIG. An electromagnetic vibration feeder 14 is disposed immediately above the sieve upper material supply port 6 formed at the left end portion of the cover 201, and the hopper 13 supplies the sieve material to this. Further, the hopper 13 and the electromagnetic vibration feeder 14 are arranged on a frame 15.

Next, the details of the sieve mesh vibration drive unit 12 will be described. In this embodiment, this is 5 as shown in FIG.
Although they are arranged at different locations, they all have the same configuration, so only one sieve net vibration drive unit 12 shown in FIG. 5 will be described. This is provided with a cup-shaped casing 21 as shown in FIG. 4, and its upper end portion is provided with a pair of angle members 23a, 23b fixed to the bottom wall portion 2a of the trough 2 by welding, for example, as shown in FIG. It is fixed by bolts 19 and 19. As shown in FIG. 4, a fixed-side electromagnet 28 is fixed by winding a coil 29 on the bottom wall of the casing 21, and a movable core 27 is supported by a pair of springs 30 with a gap therebetween. There is. This movable core 27
The lower end of the rod 26 is fixed to the central part of the rod 26, which is inserted through the opening 24 formed in the bottom wall of the trough 2 as shown in FIG. A diameter increasing portion 32 is integrally formed, and a cup-shaped metal umbrella member 31 is fixed so as to surround the diameter increasing portion 32. This is a portion protruding from the bottom wall portion 2a of the trough 2 of the rod 26 and It is arranged so as to cover the falling of the sieving bottom toward the increased diameter portion 32 formed integrally with the upper end portion. A sieve mesh mounting member 33 is fixed to the increased diameter portion 32 by a bolt 34 so as to face the umbrella member 31 with the sieve mesh 3 interposed therebetween. That is, a threaded hole (not shown) is formed in the increased diameter portion 32, and the bolt 34 is inserted into the bolt insertion hole formed in the mounting member 33 so that the threaded portion of the bolt 34 is formed in the increased diameter portion 32. The tip of the rod 26 is configured to be clamped and fixed to the sieving net 3 by being screwed and tightened in the hole. Also in this embodiment, the annular member 100 is fixed to the lower surface of the sieving net 3, and the gasket ring G is interposed below this and on the upper surface of the sieving net 3.

Further, a cylindrical projection 25 is integrally formed on the peripheral portion of the opening 24 formed in the bottom wall 2a of the trough 2, and the rod 26 penetrates through this.
Between the upper end portion and the increased diameter portion 32, a cylindrical covering member 35 made of rubber is elastically fixed to the increased diameter portion and the protruding portion 25 at the upper end portion and the lower end portion thereof.

As described above, the rod 26 is completely covered with the material under the sieve. Next, the tensioned mounting structure of the sieving net 3 to the trough 2 will be described with reference to FIG.

The sieving net 3 of this embodiment has a rectangular shape as shown in FIG. 3, but a peripheral edge of the sieving net 3 is formed in a rectangular frame 3b having a similar shape in the length direction and the width direction. It is attached by giving a predetermined tension. As shown in FIG. 5, such a sieving net 3 is placed on a strip-shaped support plate 208 fixed along the inner side wall of the trough 2, and is further made of rubber on the frame body 3b. Sealing material 20
9 is placed, and the peripheral edge portion 201a of the cover 201 is placed on this.
Are arranged in contact with each other.

Next, a fixing device 202 for fixing the cover 201 to the trough 2 and for fixing the sieving net 3 to the trough 2 will be described.

These are left and right as shown in FIG.
Since a single fixing device 202 is described with reference to FIG. 5, the mounting member 203 having an L-shaped cross section is fixed to the outer wall surface of the trough 2 by welding. Cage, this horizontal plate portion 20
A bolt insertion hole is formed in 3a, one end of which abuts on the horizontal plate portion 203a, and a tightening member 204 is disposed, and the other end of which abuts on the peripheral edge portion 201a of the cover 201. In such a state, the shaft portion of the tightening bolt 205 has the bolt insertion hole of the tightening member 204 and the mounting member 2 described above.
03 is inserted through the bolt insertion hole formed in the horizontal plate portion 203a, the nut 206 is screwed, and the cover 201 is fixed to the trough 2 by tightening the nut 206 and the sieve mesh 3, that is, the peripheral edge thereof. The rectangular frame 3b attached to the section is fixed to the trough 2 via the seal member 209.

FIG. 7 shows a concrete structure 300 for fixing the sieving net 3 to the frame body 3b by applying a predetermined tension to the frame body 3b. Now, only a part of the frame body is shown. 7, a bolt insertion hole is formed in the horizontal plate portion 301a of the angle member 301 having an L-shaped cross section, and a bolt insertion hole is also formed in the thin pad plate 302. The edge portion of the sieve mesh 3 is formed in the bolt insertion hole. Is bent as shown in the drawing, and the contact plate 303 is placed on the bent portion above this, and a bolt insertion hole is also formed in this, and as shown in the drawing, the shaft portion of the countersunk screw 304 is inserted into each of the bolt insertion holes. The sieving net 3 is attached to the frame body 301 with a predetermined tension by inserting the nut 305 into the shaft portion and screwing the nut 305 onto the shaft portion and tightening. The horizontal plate portion 301a of the angle member 301 plays a role of the support plate 208 in FIG. 5, but it may be fixed to the trough 2 by inserting a bolt into the hole 301c of the vertical plate portion 301b.

The vibrating and sieving apparatus according to the embodiment of the present invention is constructed as described above. Next, its operation will be described.

In FIG. 1, a pair of vibration motors 8a, 8b
When a current is applied to the unbalanced weight, the unbalanced weight rotates in synchronization as is well known, and the linear vibration force generated by these combined forces causes the trough to move toward the arrow a.
Linearly vibrates in the direction indicated by. It is also assumed that each sieve mesh vibration drive unit 12 is energized. In FIG. 1, the sieving material is supplied from the hopper 13 to the sieving material supply port 6 of the trough 2 by the electromagnetic vibration feeder 14. Since the trough 2 vibrates linearly in the direction of arrow a, the sieving material supplied from the supply port 6 forms a certain layer thickness and is transferred to the right in FIG. 1 by vibration. In this process, the sieve screen 3 is divided into an upper screen and a lower screen. According to the present embodiment, five sieve net vibration drive parts 12 are fixed to the sieve net, which is shown in FIG. As described above, since the coil 29 is now energized with alternating current, the movable core 27
An alternating attraction force is generated between the rod and the rod, which causes the rod 26 to vibrate in the vertical direction. Therefore, the sieve net 3 fixed at its tip is vibrated. The frequency of the alternating current supplied to the coil of the drive unit 12 is sufficiently high, and the sieving net 3 gives a shocking force by vibrating at a high frequency accordingly. Efficiently, with no clogging, it can be sharply screened into the upper screen and the lower screen. Therefore, in FIG. 1, the material on the sieve conveyed to the right side of the trough 2 is discharged to the outside from the material outlet 4 on the sieve and the material below the sieve is discharged to the outside from the material outlet 5 on the sieve.

The material is sieved on the sieve net 3 as described above, but the material under the sieve falls onto the bottom wall portion 2a of the trough 2. The trough bottom wall 2a has a cylindrical projection 25 formed on the peripheral edge of the opening as shown in FIG. 5 while being transferred by linear vibration on the bottom wall. Since it is present, it is not transported around this area and does not enter the cylindrical projection 25. That is, it does not enter the casing 21 of the vibration drive unit 12. Further, according to the present embodiment, since the cylindrical covering member 35 made of rubber is fixed between the increased diameter portion 32 at the upper end portion of the rod 26 and the protrusion 25, the material under the sieve is completely driven. The inside of the casing 21 is prevented. Further, since the umbrella member 31 is attached so as to cover the increased diameter portion 32, the material under the sieve falls onto the bottom wall portion 2a of the trough 2 while avoiding the protruding portion 25. Not only is it prevented from entering inside, but the life of the covering member 35 made of rubber is extended (since the material under the sieving is not directly applied). Further, the sieving net 3 and the bottom wall portion 2a of the trough 2 vibrate relative to each other, but since the tubular member 31 is made of rubber, it is absorbed by this flexure and has no adverse effect on the vibration of the rod 26. Does not affect.

The vibrating and sieving apparatus according to the embodiment of the present invention operates as described above. Next, the replacement operation of the sieving net 3 will be described.

First, the cover 201 is removed from the trough 2 by loosening all the bolts 205 of the fixing device 202. When replacing with a new sieving net, the sieving net 3 can be easily removed from all the sieving net driving units 12 by loosening the bolts 34 from above. Conventionally, after this, as shown in FIG. 8, a holding member 90 engaged with the mounting portions 42a and 42b at both edges of the sieve mesh 3.
By loosening and removing nuts 46a and 46b screwed to the bolts 43a and 43b through which a and 90b are inserted,
The sieving net 3 is removed. Next, since attachment portions similar to the attachment portions 42a and 42b are provided on both edges of the new sieving net, the holding members 90a and 90b are attached thereto.
After engaging the lower end of the bolt as shown in FIG.
nuts 4 with springs 44a and 44b interposed between a and 43b.
By tightening 6a and 46b, a new sieving net 3 can be installed in the trough 2 with a predetermined tension. Although tension has already been applied in this embodiment, the opening 3a is formed in the sieving net 3 and the annular member 100 is adhered to the lower surface side of the opening 3a so that the opening 3a can be easily aligned when tensioned. By the way, there is no problem that a crack is generated or a uniform tension cannot be applied on the line in the width direction including the opening 3a. Then, the bolts 34 are screwed and tightened in the screw holes of the increased diameter portion 32 with the gaskets G, G and the respective mounting members 33 interposed, whereby the tips of the rods 26 of the respective sieve net drive units 12 are fixed to the new sieve net 3. You can In this embodiment as well, the casing 21 of the drive unit 12 is fixed to the trough bottom wall 2a by the bolt 19 via the pair of attachment members 23a and 23b as shown in FIG. The sieving net can be exchanged, and the exchanging action of the sieving net is greatly simplified as compared with the conventional one. In this embodiment, the frame 3a having the sieve mesh 3 attached to the plate is simply supported by the support plate 208, and the cover 201 is fixed to the trough 2 by the fixing device 202, whereby the sieve mesh 3 is fixed to the trough 2. Therefore, it is easier to install a sieve screen that is wider than before. Further, since the sieving net 3 is already attached to the frame body 3a with a predetermined tension, the replacement work of the sieving net can be easily performed by an inexperienced operator.

The sieving net of the embodiment of the present invention is constructed as described above, but has the following effects.

That is, in the previously proposed sieve net, the applicant of the present invention has tightening devices having both edges at a structure as shown in FIG. 8, that is, bolts 43a, 43b, nut 46a,
The sieve net 3 was stretched in the trough 2 with a predetermined tension by a member composed of 46b, dogleg-shaped hook members 41a, 41b, and the like. However, such tensioning work makes the sieve net 3 to the trough 2. It is necessary each time to stretch it,
Further, it was difficult to stretch the frame uniformly, but according to this embodiment, the sieving net 3 is already stretched on the closed-loop frame body with a predetermined tension. Only the work of fixing the to the trough need be performed.

Therefore, the sieving net according to the embodiment of the present invention improves the production efficiency, and the original sieving action of the sieving net can be performed on the sieving net to which uniform tension is applied. It can be greatly improved.

Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made based on the technical idea of the present invention.

For example, in the above embodiment, as shown in FIG. 3, the rectangular sieving net 3 is attached to the frame 3a having similar shapes on the four sides, and the four edges are applied with a predetermined tension, and the attachment is performed. Although the structure shown in FIG. 7 is specifically shown, the structure is not limited to this, and only a structure in which a predetermined tension is applied to the sieve mesh 3 in the width direction, and for example, a pair of angles is provided at both ends in the longitudinal direction. Alternatively, the members may be arranged separately so as to form a closed loop together with the frame bodies on both side edges, and both end portions of the sieving net 3 may be supported thereon. Further, a rod-shaped member is arranged on the central axis in the longitudinal direction and fixed on both angle members of the short side portion, whereby the sieving net 3 has a chevron cross-sectional shape. It is also possible to apply a desired tension to the frame and form a closed loop with four separate frame bodies, so that the sieving net 3 can be attached with a predetermined tension only in the width direction.

Alternatively, an angle member having an L-shaped cross section is arranged on the short side portion of the sieving net 3 as in FIG. 7, and the short side portion of the sieving net 3 is bent to the vertical plate portion of the angle member. 7
You may make it use the attachment structure of the structure shown by. In this case, of course, with the first predetermined tension in the longitudinal direction,
Further, the sieving net 3 can be attached to the closed loop frame body with the second tension in the width direction.

Alternatively, as shown in FIG. 7, the angle member 3 is formed without bending the short side edges of the sieve mesh 3 so as to overlap each other.
01 may be bent along the vertical plate portion, that is, may be bent at a right angle, and the bent portion may be fixed to the angle member 301 with a bolt to give a predetermined tension.

Alternatively, the four side edges or both side edges of the sieving net 3 may be fixed to the frame only by adhesion or welding to give a predetermined tension.

Although a pair of oscillating motors are used to vibrate the trough in the above embodiments, the exciting drive unit is not limited to this, and an electromagnet drive unit may be used.

Further, in the above embodiments, an electromagnet is used as the sieve mesh vibration drive unit, but of course the present invention is not limited to this, and another vibration drive unit, for example, a small vibration motor may be used, or compressed air may be used. The vibration force due to the rotation of the steel balls may be used. Alternatively, the frame body may simply be inclined downward.

In the above embodiment, the vibration driving section is provided at five places, but of course, it may be provided at one place, or a larger number of sieve vibration driving sections may be provided.

In the above embodiments, the sieving net is made of nylon and is composed of an upper net and a lower net. However, like a normal sieving net, a sieving net made of a sheet of nylon and a sieving net made of metal are used. The present invention can also be applied to this.

Further, in the above embodiments, the length L and the width W are set as described above as the shape of the sieve mesh, and the openings of the sieve mesh are set at 5 positions, and the size of this diameter is also the same as in the above embodiment. However, the size ratio and the position and number of the openings are not limited to the illustrated example of the embodiment, and more openings may be formed, or one position, for example, A round hole may be formed in the center of the sieving net.

When the sieving net 3 is made of metal wire instead of nylon, an adhesive may be used. However, when the brazing material is permeated from the upper surface through the sieving mesh, the lower surface of the sieving net 3 is penetrated. On the other hand, the annular member 100 may be adhered (fixed by brazing).

Further, in the above embodiment, the opening 3a of the screen and the central hole 100a of the annular member 100 are formed on the lower surface of the screen 3.
Are aligned and fixed to the lower surface of the sieve net 3 with an adhesive, but instead of this, the openings 3a and the central holes 100a are aligned on the upper surface of the sieve net 3 as in the embodiment, The annular member 100 may be adhered and fixed by permeating an adhesive or a brazing material from the lower surface of 3.

For attaching the sieve mesh vibration drive unit 12 as in the above embodiment, it is sufficient to adhere the annular member 100 to either the upper surface or the lower surface of the sieve mesh 3, but Depending on the situation, the annular member 100 may be adhered to both surfaces of the sieving net 3.

Further, in the above-mentioned embodiment, in order to facilitate the exchange of the sieving net 3, the present invention has been applied to the case where the rod-shaped member previously proposed extends downward, but instead of this, it is further applied. The present invention can also be applied to the vibrating sieving apparatus in which the previously proposed rod-shaped member extends above the sieving net.

In the above embodiments and modifications, brazing with an adhesive or a brazing material is described as a means for adhering the annular member 100 aligned with the openings of the sieve mesh, but the invention is not limited to this. There are various conventionally known bonding methods. For example, the annular member 100 may be attached to the sieve mesh by spot welding (in this case, the sieve mesh is metal).

Although the annular member is made of metal in the present specification, the invention of the present application also includes an annular member having strength equivalent to that of metal and having the same effect as the above embodiment.

In the above embodiment, the present invention was applied to a vibrating sieving machine of a type in which a rod-shaped member is fixed to a sieving net in order to directly vibrate the sieving surface of the sieving net, but of course the present invention is not limited to this type. However, the sieving net of the present invention can be applied to, for example, a vibrating sieving machine configured such that the vibrator is directly attached to the annular member. The present invention is applicable to all other vibrating and sieving machines, that is, when the sieving net is adjusted with a desired tension in the width direction or the longitudinal direction.

In the above embodiment, the case of sieving with one-stage sieve, that is, sieving into one type of sieve and one type of sieve, is set. However, more types of sieving material and sieving material, for example, two-stage sieving are also used. The invention is applicable, and in this case, the configuration of the present invention may be applied to only one of the sieve screens, or the upper and lower sieve nets may be aligned to form openings and be aligned with the openings. The rod-shaped member may be inserted to fix the rod-shaped member to each sieving net, and the lower end portion or the upper end portion of the rod-shaped member may be coupled to the vibration driving unit. Further, although the sieving net 3 has a rectangular shape in the above embodiments, it may have a circular shape.

[0048]

As described above, according to the sieving net for a vibrating sieving machine of the present invention, for example, the tip of a rod-shaped member extending upward or downward is fixed to this sieving net, and the rod-shaped member is When used in a vibrating and sieving machine that improves the sieving efficiency by vibrating, not only ensure the attachment of the tip of the rod-shaped member and the sieving net, but also when using this vibrating and sieving machine, For example, in the width direction, it is necessary to adjust with a certain tension, but at this time, tension is not applied or cracks occur on the line in the width direction passing through the opening formed in the sieve mesh, which has been conventionally seen. The use of the sieving net is prevented, the sieving net can always be adjusted with an appropriate tension, and the rod-shaped member as described above is used. It can withstand long-term use in with Ri. In particular, since the sieving net is already attached to the frame body with a predetermined tension, the work of incorporating the sifter into the trough becomes much easier than in the past.

[Brief description of drawings]

FIG. 1 is a side view of a vibrating screen device according to an embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a plan view of the device with a cover removed.

FIG. 4 is an enlarged cross-sectional view of a main part of a sieve mesh vibration drive unit in the example.

5 is an enlarged cross-sectional view taken along line [5]-[5] in FIG.

6 is a sectional view taken along the line [6]-[6] in FIG.

FIG. 7 is an enlarged cross-sectional view of a main part of a sieving net according to a modified example of the same embodiment.

FIG. 8 is a cross-sectional view of a vibrating screen device previously proposed by the applicant.

FIG. 9 is a partially enlarged sectional view of a sieving net in the same device.

[Explanation of symbols]

 1 Vibrating sieving device 3 Sieve net 3a Opening 3b Frame 100 Ring member 100a Center hole

Claims (1)

[Claims] 1. A metal annular member having a central hole having substantially the same diameter as a circular opening formed in a mesh surface is aligned with the opening and adhered to the upper surface or the lower surface of the mesh surface, A sieving net for a vibrating sieving machine, characterized in that a predetermined tension is applied to fix the rim to a closed loop frame.