JP4376417B2 - Sieving machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vibration sieving machine such as crushed stone.
[0002]
[Prior art]
The conventional vibratory sieving machine is provided with a vibrator on the raw material supply side at the starting end of both side plates, and the amplitude T at the starting end is increased (FIG. 5). However, it is difficult to improve the classification efficiency by effective vibration because the raw material reaches the terminal part as it is without being delicately separated at the starting part.
[0003]
[Problems to be solved by the invention]
The present invention provides a vibrating sieve machine in which raw crushed stone is widely dispersed on a sieve mesh by microvibration at the start end, and particles are finely separated and sieved sufficiently and in a short time with a large amplitude at the end, and sieving efficiency is good. The purpose is to obtain.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the present invention
First, the upper transition part of the endless rotating sieve mesh is moved between both side plates supported by the machine base via an elastic machine, and a plurality of lower surface receiving rollers of the transition part are installed between the both side plates. end end side is provided an eccentric rotating shaker, and so as to discharge the undersize discharge hopper of the upper transition portion from between the upper and lower transition portions laterally, and the Furuijo the upper transition portion above final discharged from the end portion side start end portion side upper to supply the raw material and the eccentric rotation vibrator is eccentric pivot shaft on the bullet machine provided on the machine base in the final end side both outer sides of the side plates the eccentric bearing is provided, the central bearing of the eccentric pivot shaft is provided on both side plates, a shaft eccentric rotated upward from its eccentric axis start end side around the drive device for rotating further from the upper final end side was subjected to micro-vibration in the upper transition portion is beginning side provided, and below the amplitude becomes large enough to Yuku the terminal end side and the weft of the endless rotary Dofurui network, The lower is connected integrally with the upper and lower stages on top of Keijo, sieving machine in Nukijo in which core wires are embedded
The second supported by bullet machine the beginning end side of the both side plates to the machine base to the above first aspect sifter according
Thirdly, it is constituted by the sieving machine according to the first or second invention, wherein the rotation speed of the endless rotation sieve screen is variable .
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Both side plates 3, 3 are arranged on the upper part of the machine base 1, and the upper ends of both side plates 3, 3 are connected by a leakage prevention plate 3 'to form a plane U-shaped sieve frame.
[0006]
A plurality of sieve screen lower surface receiving rollers 5 are laid freely on the upper part between the side plates 3 and 3 at a pitch of 150 mm, and an upper transition portion 4 ′ of the endless rotating sieve mesh 4 is supported on the rollers 5. The driving roller 14 of the sieve screen 4 is provided at the start end (the other end) between the side plates 3 and 3, the driven roller 15 of the sieve screen 4 is provided at the terminal end (one end), and both the rollers 14 and 15 are installed. Supports almost horizontal level.
[0007]
The sieve mesh 4 bypassing the drive roller 14 is circulated by four guide rollers 16 to return to the drive roller 14 through the lower part of the machine base 1, and the drive roller 14 is a variable speed provided at the upper part of the machine base 1. An endless chain 18 is wound around an output sprocket 17 ′ provided on the output shaft of the motor 17 and an input sprocket 14 ′ provided on the drive roller 14, and the sieve mesh 4 is rotated at 42 to 64 m / min. . The transfer speed of the sieve screen 4 is adjusted by the variable speed motor 17 so as to correspond to the humidity of the input raw material.
[0008]
As shown in FIG. 1, a small table 19 is provided on the upper outer side of the both end plates 3 and 3 on the starting end side. The side plates 3 and 3 are supported by pillow blocks and pins 19 'provided on the upper surface of the small table 19 and slightly slid on the machine table 1 by wheels (not shown) provided on the lower surface. It can be supported freely.
[0009]
Bearings 9 and 9 made of pillow blocks are arranged in the middle of the end portions of the side plates 3 and 3, and an elastic machine 2 with a coil spring is interposed between the bearing 1 ′ provided on the machine base 1 and the bearing 9. The bearing 9 supports a protrusion 8 ′ centered on an eccentric axis c projecting from both ends of the eccentric rotation shaft 8 and is centered on the center line c ′ of the eccentric rotation shaft 8. 10 and 10 are provided on both side plates 3 and 3, the eccentric rotation shaft 8 is installed between both side plates 3 and 3, a pulley 20 is provided on one projecting portion 8 ′, and a small diameter provided on the output shaft of the drive motor 21. An endless belt 23 is hung between the pulley 22 and the eccentric rotation shaft 8 from the start end side to the upper side, from the upper end to the end side from the end side to the lower side, and from the lower side to the start end side about the eccentric axis c. Thus, the eccentric rotational vibration is applied to the side plates 3 and 3, and the eccentric rotational vibrator 6 can be obtained.
[0010]
The drive motor 21 of the vibrator 6 is provided on an up-and-down base plate 25 whose end is pivotally supported by a pin 24 on the machine base 1, and the end portion side of the base plate 25 is supported by a coil ridge 26. The drive device 11 of the eccentric rotation vibrator 6 is relaxed by reducing the vibration applied to 21.
[0011]
Further, a raw material supply hopper 27 is provided immediately above the starting end of the upper transition part 4 ′, and a sieving discharge hopper 7 is provided between the upper transition part 4 ′ and the lower transition part 4 ″. Can be discharged to the side of the machine base 1, and the sieve top is discharged from the end of the upper transition part 4 ′ through the discharge hopper 28 to the outside of the machine.
[0012]
Synthetic resin strips 12 and 13 shown in enlarged form in FIG. 3 are used for the endless rotating sieve mesh 4, and the mesh is 3 mm or less, and crushed stones having relatively small particles are used as raw materials. As long as the kinematic mesh 4 is formed, it can be selected appropriately.
[0013]
The weft 12 has a core wire 12 'embedded therein, and the weft 12 and the warp 13 are integrally connected in two upper and lower stages, so that the weft 12 and 12 and the warps 13 and 13 and the crushed stone when passing crushed stone Is contacted twice in the vertical direction, and the speed of passing from the top to the bottom of the mesh 4 of the upper transition part 4 ′ is high. That is, the parts (A)-(A) are the first contacts, and the lower (B)-(B) are the next contacts, so the frictional resistance is also divided in half and quickly passes under the screen, causing clogging. Can be prevented.
[0014]
As shown in FIG. 4, the upper transition part 4 ′ performs fine vibration on the starting end side, so that the feedstock diffuses on the sieve screen 4 ′, is divided into large, medium and small particles and is finely classified as going to the end. Then, the vibration of the lower surface receiving roller 5 accompanying the both side plates 3 and 3 is struck from the bottom to the top by the above vibration and the sieving is performed quickly, and the vertical amplitude T increases as it goes to the terminal end side (see FIG. Status).
[0015]
In the figure, reference numeral 29 denotes an under-siege discharge scraper provided in the under-siege discharge hopper, 30 denotes a rotating shaft of the scraper 29, 31 denotes a drive motor of the rotating shaft 30, 32 denotes an endless chain that supports both ends of the scraper, Reference numeral 33 denotes a drive sprocket for the chain 32, and 34 denotes a raw material transfer conveyor.
[0016]
【The invention's effect】
Since the present invention is configured as described above, crushed stone (crushed stone such as limestone, sandstone, basalt, andesite, and quartzite) has a small amplitude T at the upper transition portion of the endless rotating sieve mesh, and therefore the crushed stone raw material is sieved. It spreads over the net over a sufficient amount of time, and the amplitude gradually increases as it goes to the end side, so that sieving can be carried out efficiently and in large quantities at high speed by tapping from below.
[0017]
In addition, since the wefts of the sieve screen are provided stepwise on the warp, the raw material has an effect of being able to pass through the sieve mesh from top to bottom quickly.
[0018]
Further, since the transition speed of the endless rotating sieve screen is variable, there is an effect that the sieving can be appropriately performed according to the humidity of the raw material.
[Brief description of the drawings]
FIG. 1 is a side view of a sieving machine of the present invention.
FIG. 2 is a longitudinal sectional view of a starting end portion of FIG.
FIG. 3 is a partially enlarged view of a sieve screen.
FIG. 4 is an explanatory diagram of a vibration state of a sieve screen.
FIG. 5 is a diagram illustrating a conventional vibration state.
FIG. 6 is a side view of a conventional sieving machine.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Machine base 2, 2 'Ammo 3 Both side plates 4 Endless rotation sieve screen 4' Upper transition part 4 "Lower transition part 5 Lower surface receiving roller 6 Eccentric rotation vibrator 7 Eccentric discharge hopper 8 Eccentric rotation shaft Eccentric bearing 10 Center bearing c Eccentric axis 11 Drive device 12 Weft 13 Warp

Claims (3)

On either side plates which is supported through the bullet machine machine base transitions the upper transition portion of the endless times Dofurui network, a plurality erection the lower surface receiving roller該移line portion between the both side plates, end edges of the side plates side to provided an eccentric rotating shaker, and then to discharge laterally of undersize discharge hopper of the upper transition portion from between the upper and lower transition portion, and the final end side of the upper transition portion Furuijo an eccentric bearing of the eccentric pivot shaft on to supply the raw material to the top of discharged beginning end side and the eccentric rotation vibrator bullet machine provided on the machine base in the final end side both outer sides of the side plates from provided, the central bearing of the eccentric pivot shaft is provided on both side plates, a shaft eccentric rotated upward from its eccentric axis start end side to the center and provided with a driving device for rotating further from the upper final end side The upper transition part slightly vibrates on the start end side, and the vertical amplitude increases as it goes to the end end side, and under the weft of the endless rotating sieve mesh There will be integrally connected to upper and lower stages on top of the via Article sifter in which core wires are embedded in the Nukijo. Sieving machine according to claim 1, wherein supported by bullet machine machine frame the beginning end side of the side plates.   The sieving machine according to claim 1 or 2, wherein the rotation speed of the endless rotation screen is variable.

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