JPH0568946A - Device for fixing screen in vibrating screening apparatus - Google Patents

Abstract

PURPOSE:To provide a device for fixing a screen with a structure to prevent spilling of a material to be classified and easy to detach from a trough. CONSTITUTION:A screen 7 set in a frame is formed by fixing a screen 9 stretched by a specified tension in a square frame 8. The upper and lower surfaces of the square frame 8 for setting the screen 7 are kept in a condition sandwiched by an upper frame 15 and a lower frame 16 respectively, and they are placed in a trough 4. The screen 7 is fixed in the trough 4 by pushing the upper frame 15 with a number of fixtures 17 installed on the upper periphery of the trough 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sieving net fixing device in a vibrating sieving device which prevents material spillage and facilitates attachment and detachment of the sieving net.

[0002]

2. Description of the Related Art In a vibrating sieving device, there are various devices for assembling and fixing a sieving net, particularly a fine sieving net made of a woven net, in a trough, and the following two are frequently used. There is one. The sieve shown in FIG. 8 has a width slightly smaller than the width of the trough 30 in consideration of a pulling margin for applying a tension, and a sieve having reinforcing pad 31 attached to both ends in the width direction. The net 32 is processed, both ends in the width direction of the sieve net 32 are bent inward, hooked on the hook 33, and the hook 33 is pulled from the outside of the side plate 30a of the trough 30 by the tension bolt 34 to adjust the tension. While performing, the sieving net 32 is incorporated and fixed in the trough 30. In addition, as shown in FIG. 9, both ends in the width direction of the sieving net 32 are sandwiched by a pair of hooks 35a and 35b and bent at a right angle, and the hooks 35a and 35b are pulled from outside the side plate 30a of the trough 30 by a tension bolt. 34 is pulled in and fixed.

In any of the devices, the sieve mesh is incorporated while adjusting the tension at the time of fixing, so that there are the following problems. (1) Since the trough 30 is a can-made product, a gap is partially formed between the hooks 33, 35a and the side plate 30a of the trough 30, and the material to be sorted spills downward through the gap. At the same time, the material to be sorted may spill out of the trough 30 through the insertion holes 36 of the tension bolts 34 provided in the side plate 30a of the trough 30. (2) Tensile bolt 3
4, while adjusting the tension by 4, when incorporating and fixing the sieve net 32 in the trough 30, small pieces of metal or metal powder are cut out by the "stripping" of the tensile bolt 34,
This may be mixed in the material to be sorted. (3) Since the sieving net 32 is assembled and fixed to the trough 30 while adjusting the tension, the tension of the sieving net varies depending on each worker who performs the assembling work, and it takes a long time to assemble the sieving net. I needed it. In order to make the tension of the sieving net uniform and to prevent uneven tension, the operator is required to have considerable experience and skill. (4) When the sieving net 32 is used for a certain period of time, the sieving net 32 may be removed from the trough 30 for cleaning or maintenance. At this time, the sieving net 32 is easily damaged. Further, when the sieving net 32 becomes large, a lot of trouble and time are required for the attachment / detachment operation.

[0004]

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a sieving net fixing device having a structure that can be easily attached to and detached from a trough and that the material to be sorted does not spill out. There is.

[0005]

In order to solve this problem, the means adopted by the present invention is to form a frame-tensioned sieve net to which a sieve net is attached to a rectangular frame by applying a predetermined tension to form a trough. A large number of units mounted on the upper edge of the trough with the rectangular frame of the above-mentioned frame-sieving net sandwiched between the upper and lower frames functioning as the side plates of the upper and lower conveying paths are incorporated into the trough. By pressing the upper frame against the bottom plate portion of the trough with the fasteners, and sandwiching the square frame of the frame-expanded sieve mesh between the upper frame and the lower frame, the frame-expanded sieve mesh is formed. It is to fix it on the trough.

[0006]

The square frame of the frame-sieving net is sandwiched between the upper and lower frames and incorporated in the trough, and the upper frame is attached by a plurality of fasteners attached to the upper edge of the trough. Since the frame-tensioned sieve net is fixed to the trough by pressing the muff against the bottom plate of the trough, it is not necessary to adjust the tension of the sieve net when assembling the sieve net to the trough as in the conventional case. Therefore, the sieve mesh can be quickly attached to and detached from the trough, and unevenness of the tension of the sieve mesh does not occur. The square frame of the frame tension sieve mesh is securely sandwiched between the upper frame and the lower frame, and the upper and lower frames function as side plates of the upper and lower conveying paths of the trough, respectively. Since both ends of the screen in the width direction do not come into direct contact with the side plates of the trough, there is no gap at both ends of the screen in the width direction, and the material to be sorted is spilled without being sorted during transportation. It will not come out.

[0007]

EXAMPLES The present invention will be described in more detail with reference to examples. 1 is a front view of a vibrating and sieving apparatus according to the present invention, FIG. 2 is a right side view of the same, and FIG.
4 is an enlarged sectional view taken along line XX of FIG. 4, and FIG. 4 is a sectional view taken along line YY of FIG. A total of two pairs of columns 2a and 2b, one pair each in the front and rear, are erected on the substrate 1, and the troughs 4 are attached to the upper ends of the columns 2a and 2b via the vibration-proof springs 3 in a forward tilted posture. An electric motor mounting plate 5 is integrally provided on a bottom plate portion 4a of the trough 4, and as shown in FIG. 2, a pair of vibrating electric motors 6 are provided on the electric motor mounting plate 5 along a width direction of the trough 4. It is installed at intervals. The pair of vibration motors 6 are mounted on the rear side of the trough 4 (the upstream side as viewed from the flow of the material to be sorted) to vibrate the entire trough 4.

5 to 7 show a frame-sieving mesh 7 used in the present invention. This frame tension sieving net 7
A sieving net 9 made of a woven net is attached to the rectangular frame 8 integrally with a predetermined tension. The outer peripheral portion of the rectangular frame 8 has a smaller thickness than the inner peripheral portion,
The peripheral edge of the sieving net 9 is fixed to this portion via a large number of screws 11 and nuts 12. In this rectangular frame 8,
A large number of reinforcing plates 1 at predetermined intervals along the longitudinal direction
3 is attached in the width direction, and a drop port 14 for dropping the material that did not pass through the mesh is formed at one end in the longitudinal direction. A packing 10 is interposed at a portion where the sieving net 9 is in contact with the rectangular frame 8 and the reinforcing plate 13 to prevent the sieving net 9 from being worn.

As shown in FIGS. 1 to 4, the upper and lower surfaces of the four sides of the rectangular frame 8 of the above-described frame-sieving net 7 are respectively formed by an upper frame 15 and a lower frame 16 having a U-shaped cross section. Put it in the state of being sandwiched, and install it in the trough 4
Many fasteners 17 attached to the upper edge of the side plate portion 4b of the
The upper frame 15 is pressed against the bottom plate portion 4a of the trough 4 to fix the frame-tensioned sieve mesh 7 to the trough 4. More specifically, the flange portion 4c formed on the upper end of the side plate portion 4b of the trough 4 and the flange portion 15a of the upper frame 15 are provided.
A flange portion 18a provided on the lower end surface of the lid 18 that covers the entire trough 4 is in close contact with each upper surface of the. Fastener 17
The pair of support plates 17a is fixed to the outer surface of the side plate portion 4b of the trough 4 in the horizontal direction at a predetermined interval, and the rod 17b is horizontally supported between the pair of support plates 17a. One end of 17c is brought into contact with the portion of the pair of support plates 17a, and the other end is brought into contact with the portion where the flange portion 18a of the lid 18 and the flange portion 15a of the upper frame 15 overlap. The tightening bolt 17d is screwed into a female screw formed in the direction perpendicular to the axis of the rod 17b to press the upper frame 15 against the bottom plate portion 4a of the trough 4. As a result, all four sides of the rectangular frame 8 forming the frame-sieving net 7 are sandwiched by the flange portions 15a and 16a of the upper and lower frames 15 and 16, respectively. It is installed in the trough 4 and fixed. In a state where the frame-clad sieving net 7 is incorporated in the trough 4, the upper frame 15 and the lower frame 16 are connected to the sieving net 9
It functions as each side plate of the upper transport path 20a and the lower transport path 20b partitioned by the trough 4. A packing 19 is provided between the rectangular frame 8 forming the frame tension sieving net 7 and the flange portions 15a, 16a of the upper and lower frames 15, 16, respectively.
And the packing 19 is also interposed between the lower flange portion 16a of the lower frame 16 and the bottom plate portion 4a of the trough 4 to prevent the metal members from directly contacting each other. I'm avoiding it.

On the lower surface of the bottom plate portion 4a of the trough 4,
A plurality of sieving net vibration generators 21 for directly vibrating the sieving net 9 are attached, and an upper end of a vibrating rod 22 constituting the device 21 is fixed to the sieving net 9. By providing a vibration generating device 21 for the sieve screen separately from the vibrating motor 6 and directly vibrating the sieve screen 9, the material selection capability as the vibrating screen device is enhanced.

As shown in FIGS. 1 and 4, the trough 4
At the front end of the bottom plate portion 4a of each of the first and second outlets 2
3, 24 are provided. First and second outlets 2
From the materials 3 and 24, the material that has passed through the sieving net 9 and the material that has not passed are discharged.

Then, the vibration motor 6 which is the main vibration generator is activated to apply a linear vibration in the direction of the arrow Q (see FIG. 1) to the entire trough 4, and at the same time, the vibration generator 21 for each sieve net is activated. When linear vibration in the axial direction is generated in the vibrating rod 22 and vibration in the vertical direction is directly applied to the sieving net 9, the charging port 18b provided in the lid 18 is provided.
The material to be sorted put into the upper transport path 20a of the trough 4 from the trough 4 is sorted while being transported on the sieving net 9 by both vibration and inclination. The material that has passed through the stitches of the sieving net 9 and dropped into the lower conveying path 20b of the trough 4 is conveyed as it is and is discharged from the first discharge port 23, and does not fall from the stitches until the end of the sieving net 9 is reached. The material is dropped from the drop opening 14 provided in the rectangular frame 8 at the end of the sieving net 9 and discharged from the second discharge opening 24, whereby the material is sorted.

By sandwiching the rectangular frame 8 constituting the frame-tensioned sieve net 7 from above and below by the upper and lower frames 15 and 16, respectively, the peripheral edge of the sieve net 9 is above and below each frame 1.
Since it is sandwiched between the flange portions 15a and 16a of the pipes 5 and 16 without any gap, the material conveyed through the upper conveying path 20a does not spill from both end portions of the sieving net 9.

When the frame tension sieve mesh 7 is removed for cleaning or maintenance, or when the frame tension sieve mesh 7 is removed for replacement, the fastener 17 is loosened and the upper frame is removed from inside the trough 4. 15, frame tension sieve mesh 7, lower frame
The frames 16 can be taken out in this order and can be removed immediately.

Further, in the above-described embodiment, since all four sides of the rectangular frame 8 constituting the frame-sieving mesh 7 are sandwiched by the upper and lower frames 15 and 16, respectively, the frame-sieving mesh 7 is formed. The trough 4 and the trough 4 are firmly integrated, and there is an advantage that the rattling of the frame tension sieving net 7 does not occur.
If the "rattle" of the frame-sieving mesh 7 does not occur only by sandwiching the two sides in the longitudinal direction of the frame with the upper and lower frames 15 and 16, the two sides in the width direction of the frame-sieving mesh 7 are open. You may keep it.

[0016]

According to the present invention, a sieving net is attached to a rectangular frame by applying a predetermined tension to the sieving net, and the sieving net is attached between the upper frame and the lower frame. The square frame is sandwiched and the frame-tightened sieve net is fixed to the trough, so the sieve net can be attached to and removed from the trough in a short time without adjusting the tension of the sieve net, and from both ends of the sieve net. Since the material to be sorted does not spill, it is possible to prevent the sorting accuracy of the vibrating and sieving device from being degraded. Further, since the tension bolt is not used for fixing the sieve mesh to the trough, there is no fear that small metal pieces or metal powder generated by cutting the mesh will be mixed into the material to be sorted.

[Brief description of drawings]

FIG. 1 is a front view of a vibrating screen device according to the present invention.

FIG. 2 is a right side view of the same.

FIG. 3 is an enlarged cross-sectional view taken along line XX of FIG.

FIG. 4 is a sectional view taken along line YY of FIG.

5 is a plan view of a frame-sieving screen 7. FIG.

6 is an enlarged cross-sectional view taken along line Z ₁ -Z ₁ of FIG.

7 is a Z ₂ -Z ₂ line enlarged cross-sectional view of FIG.

FIG. 8 is a partial cross-sectional view of a conventional sieving mesh fixing device.

FIG. 9 is a partial cross-sectional view of another conventional fixing device for a sieve mesh.

[Explanation of symbols]

 4: Trough 7: Frame tension sieve mesh 8: Square frame 9: Sieve mesh 15: Upper frame 16: Lower frame 17: Tightening tool 20a: Upper transportation path of trough 20b: Lower transportation path of trough

Claims (1)

[Claims] 1. An upper frame and a lower frame that form a frame-tensioned sieve net attached to a rectangular frame by applying a predetermined tension to the frame and function as side plates of the upper and lower conveying paths of the trough. And the square frame of the frame-tightening mesh is sandwiched between them and incorporated into the trough, and the upper frame is pressed against the bottom plate portion of the trough by a large number of fasteners attached to the upper edge of the trough, A sieving mesh fixing device in a vibrating sieving device, characterized in that a square frame of a frame tension sieving net is sandwiched between an upper frame and a lower frame to fix the frame sieving mesh to a trough.