JP4941946B2 - Self-propelled vibrating screen - Google Patents

Description

  The present invention relates to a self-propelled vibrating screen that screens objects to be sorted such as industrial waste, earth and sand, crushed stone, and wood chips according to the size (grain size) of the particles.

  In recent years, demand for recycling machines that produce recycled products from various recycled materials represented by construction-generated soil, rocks, waste tires, and the like, such as soil quality improvement machines, crushers, and shredders, is increasing in various places. One of these machines that assists in the work of recycling machines. Recycled raw materials supplied to recycling machines and recycled products discharged from recycling machines are selected as objects to be selected. is there.

  A vibrating screen is a machine that screens the objects to be sorted by vibrating a frame with a sieve member on the inside. As an example of this vibrating screen, a power pack with a built-in power source is used as a traveling body. There is one in which a discharge conveyor is provided on the traveling body so as to be mounted on the power pack and further passed over the power pack, and a sieving device is disposed on the upper portion of the discharge conveyor (see Patent Document 1, etc.).

JP 2005-296893 A

  Not all of the selected items on the transport surface of the discharge conveyor are discharged at the discharge end of the discharge conveyor. I will do it. Here, the conveying surface is the upper surface on which the sorted product on the annular conveyor belt of the discharge conveyor is placed and conveyed, and the return surface is the conveying direction after discharging the sorted item at the discharge end and turning it back. It is the lower surface that returns to the upstream side.

  Therefore, when the discharge conveyor is passed over the power pack as in the vibration screen of Patent Document 1, the sorting that falls from the return surface of the conveyor belt accumulates on the power pack as the sorting operation progresses, and the aesthetic appearance is impaired. At the same time, it necessitates extra cleaning work. Also, if the deposits on the power pack are left unattended for a long period of time, the deposits superimposed on the power pack will come into contact with the return surface of the conveyor belt, causing the scattered items to scatter (spread). In some cases, there is a risk that the selected items may be caught in each part of the discharge conveyor.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a self-propelled vibrating screen capable of suppressing the accumulation of selected items on the power pack, and hence unnecessary diffusion of the selected items. .

  To achieve the above object, the first invention provides a pair of left and right traveling means, a body frame provided on the traveling means, a discharge conveyor provided on the body frame, and an upper side of the discharge conveyor. A sieving device provided; a power pack provided below the discharge conveyor; and a splash prevention cover provided at a lower portion of the discharge conveyor, wherein the main body frame faces the left and right traveling means from above. The scattering prevention cover is continuous with the cover main body portion inclined downward toward the upstream side in the conveying direction of the selection by the discharge conveyor and the lower end portion of the cover main body portion. The cover body portion covers the upper side of the power pack, and the guide portion is further downward toward the upstream side in the transport direction with respect to the cover body portion. With inclined, characterized in that its lower end is positioned above the opening of the main body frame.

  According to a second invention, in the first invention, the bracket that supports the guide portion of the anti-scatter cover to the frame of the discharge conveyor includes the guard member of the return roller that supports the return surface of the conveyor belt of the discharge conveyor. It is also used as a bracket attached to the frame of the discharge conveyor.

  According to a third invention, in the first or second invention, the discharge conveyor is tiltably connected to the main body frame, and covers a side portion of a space between the discharge conveyor and the main body frame. A safety fence is provided on both sides of the main body frame so that the guide portion of the anti-scattering cover is exposed to the side of the machine body.

  According to the present invention, the anti-scattering cover is provided on the power pack to collect the selections falling from the conveyor belt, and actively guide and accumulate on the ground between the traveling means. It is possible to suppress the deposit of the selected material and thus suppress unnecessary diffusion of the selected material.

It is a side view showing the whole structure of the self-propelled vibration screen concerning a 1st embodiment of the present invention. It is an enlarged view of the structure of the vicinity of the support member which supports a discharge conveyor with respect to the main body frame in the self-propelled vibrating screen which concerns on 1st Embodiment of this invention. It is the perspective view which looked at the part which FIG. 2 shows from the left side and a little back. It is the perspective view which looked at the IV-IV cross section in FIG. 2 from the left back. It is the top view which looked at the traveling body with which the self-propelled vibration screen concerning a 1st embodiment of the present invention was equipped from the top.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a side view showing the overall configuration of the self-propelled vibrating screen according to the first embodiment of the present invention. The left and right in FIG. 1 are the front and back of the self-propelled screen.

  The self-propelled vibrating screen shown in FIG. 1 includes a traveling body 1, a discharge conveyor 2 provided on the traveling body 1, a sieve device 3 provided on the upper side of the discharge conveyor 2, and a lower side of the discharge conveyor 2. And a power pack 4 provided.

  The traveling body 1 includes a pair of left and right traveling means 10 and a main body frame 11 provided on the upper part of the traveling means 10. The travel means 10 includes a pair of left and right track frames 12, driven wheels 13 and drive wheels 14 provided on the front and rear sides of the track frames 12, a travel hydraulic motor 15 having an output shaft connected to the drive wheels 14, An endless track crawler belt 16 wound around the driven wheel 13 and the driving wheel 14 is provided. The main body frame 11 is a frame-like member that is three-dimensionally assembled with a plurality of steel materials extending in the vertical, horizontal, and front-rear directions, and is provided at the upper part of the track frame 12. The front end portion is located behind the front end portion of the traveling means 10 so as not to protrude. The rear end portion of the main body frame 7 is located slightly behind the rear end portion of the traveling means 10. A guard 17 for preventing entrainment between the discharge conveyor 2 and the sieving device 3 is provided at the rear of the main body frame 11.

  The discharge conveyor 2 conveys a sorted product of a predetermined particle size or less sorted by the sieving device 3 and discharges it to the front of the machine body, and is disposed so as to rise obliquely toward the front. The discharge conveyor 2 includes a conveyor frame 20, a head pulley 21 that is rotatably provided at the front end of the conveyor frame 20, a tail pulley (not shown) that is rotatably provided at the rear end of the conveyor frame 20, and a head pulley 21. And a conveyor belt 23 wound around the tail pulley and a discharge conveyor hydraulic motor 24 connected to the head pulley 21, and the head pulley 21 is driven by the discharge conveyor hydraulic motor 24 so that the head pulley 21 is connected to the tail pulley. The conveyor belt 23 is circulated and driven.

  The conveyor frame 20 has a rear end portion connected to a rear end portion on the upper portion of the main body frame 11 via a rotation shaft 30 so as to be tiltable, and a central portion in the front-rear direction is connected to the main body frame 11 via a support member 31. It is supported by. The support member 31 includes a casing portion 32 and a rod portion 33 inserted into the casing portion 32, and the upper end portion of the casing portion 32 is attached to a bracket 35 provided at the front and rear center portion of the conveyor frame 20 via a pin 34. The lower end portion is pivotally connected to a bracket 37 provided at the front portion of the main body frame 11 via a pin 36. The casing portion 32 and the rod portion 33 of the support member 31 are connected by a hydraulic cylinder 38, and the rod portion 33 slides relative to the casing portion 32 as the hydraulic cylinder 38 expands and contracts. The discharge conveyor 2 tilts about 30 as a fulcrum. At this time, it is safe to be positioned on the left and right sides of the conveyor frame 20 on both sides of the main body frame 11 so as not to enter under the discharge conveyor 2 where the operator or the like tilts and be sandwiched between the main body frame 11. A fence 39 is raised.

  The sieving device 3 sorts the material to be sorted according to the particle size. The sieving device 3 is a frame-type sieving device main body 46 supported on the upper part of the rear part of the conveyor frame 20 through an elastic member 45 so as to be vibrated, A sieve member (not shown) fixed inside the apparatus main body 46 and a vibration device 48 that vibrates the sieve apparatus main body 46 are provided. The vibration device 48 is driven to drive the sieve device main body 46 and the sieve. The members are shaken integrally, and among the inputted objects to be sorted, sorted materials having a predetermined particle size or less that pass through the sieve member are guided onto the discharge conveyor 2, and those having a larger particle size are discharged to the rear of the machine body. In FIG. 1, a rubber spring is used as the elastic member 45, but another elastic body such as a coil spring may be used. The elastic members 45 are arranged on the left and right sides of the sieving device main body 46, respectively, and the sieving device main body 46 is supported by the conveyor frame 20 at a total of four locations. Further, the sieving device 3 is arranged with the center of gravity slightly shifted backward with respect to the traveling means 10, and the sieving member inside is arranged so as to be lowered rearward like the discharge conveyor 2. Since the sieving device 3 is supported by the conveyor frame 20 of the discharge conveyor 2, the tilting angle of the discharge conveyor 2 can be changed according to the properties of the object to be selected to adjust the sorting capability.

  The power pack 4 incorporates a power source of an operating device mounted in various parts of the machine body such as an engine, a hydraulic pump, a control valve, etc., and is loaded on a power pack frame 50 suspended from the conveyor frame 20 and discharged to the discharge conveyor 2. Located on the underside. The power pack frame 50 is suspended from the conveyor frame 20 at a position in front of the bracket 34 to which the support member 31 is connected, and the power pack 4 is positioned in front of the traveling body 1. However, the front-rear position of the power pack 4 is limited so that the center of gravity of the machine body combined with other mounted devices such as the sieving device 3 and the discharge conveyor 2 comes to a substantially central position in the front-rear direction of the traveling device 10. Accordingly, when the hydraulic cylinder 38 is contracted and the discharge conveyor 2 is laid down, the power pack 4 is lowered to the space in front of the traveling body 1 without overlapping the upper portion of the traveling body 1. Therefore, the discharge conveyor 2 can be laid down to a horizontal position, and the total height of the machine body can be suppressed to a range that falls within the transport limit height of a general road during transportation.

  In addition, when there is a margin up to the transport limit height and it is not necessary to lower the power pack 4 to the space in front of the traveling body 1, the power pack 4 can be installed on the main body frame 11 or the truck frame 12. .

  An operation panel 51 is provided on the left side surface of the power pack 4 to instruct the operation of the discharge conveyor, the sieve device 2 and the like. An operation unit 52 is provided adjacent to the operation panel 51 for instructing the expansion / contraction operation of the hydraulic cylinder 38 described above. In addition, the power pack 4 is provided with a step 53 as a foothold on which an operator stands when operating the operation panel 51 or the operation unit 52.

  FIG. 2 is an enlarged view of the structure in the vicinity of the support member 31 that supports the discharge conveyor 2 with respect to the main body frame 11.

  As shown in FIG. 2, at the lower part of the discharge conveyor 2, a target collection position is received by receiving the sorting falling from the return surface of the conveyor belt 23 (the opening 81 </ b> C (see FIG. 5, which will be described later) in this embodiment). An anti-scattering cover 55 that actively guides the light is provided. Here, in the following description, the upper surface (the surface flowing to the head pulley 21 side) on which the selected item is placed and conveyed on the annular conveyor belt 23 of the discharge conveyor 2 is conveyed and the selected item is discharged and returned at the discharge end. The lower surface (surface flowing to the tail pulley side) that returns to the upstream side in the transport direction after rolling is referred to as a return surface.

  The anti-scattering cover 55 mainly includes a cover main body 56 that plays a role of receiving a selection falling from the return surface of the conveyor belt 23 toward the power pack 4, and a selection received mainly by the cover main body 56. And a guide portion 57 that plays a role of actively leading to a target accumulation position. In the present embodiment, the cover main body portion 56 and the guide portion 57 are both formed of a flat plate-shaped steel plate. However, for example, the central portion in the width direction of the discharge conveyor 2 may be formed to protrude downward to be configured in a bowl shape. . Further, the cover main body 56 and the guide 57 may be formed integrally by bending a single steel plate, or may be configured separately and joined together.

  The cover main body portion 56 extends in the same direction as the conveyor frame 20, and the upper surface for receiving the sorted product is inclined downward toward the upstream side (that is, the rear side) in the conveying direction of the sorted product by the discharge conveyor 2, In the present embodiment, the upper portion of the range L1 from the position slightly ahead of the front edge of the power pack 4 to the rear position of the rear edge of the power pack 4 (in the present embodiment, near the pin 36 below the support member 31) is covered. ing. However, the range L1 before and after the cover main body 56 covers is not limited to this, and it is sufficient if it includes at least the upper part of the range from the front edge to the rear edge of the power pack 4. However, it is desirable to limit the cover range to only the space above the power pack 4 when cleaning of the cover main body 56 itself is taken into account in order to perform the function of preventing the selection item from falling onto the power pack 4. .

  On the other hand, the left and right range covered by the cover main body 56 is the entire width of the discharge conveyor 2, and in this embodiment, the cover main body 56 is passed between the left and right conveyor frames 20 and is bolted to the lower part of the conveyor frame 20. It is fixed by appropriate fixing means such as. In the present embodiment, there is no gap between the conveyor frame 20 and the cover main body 56, and the cover main body 56 constitutes the bottom plate of the conveyor frame 20 above the power pack 4, and the bottom of the conveyor frame 20 is the cover main body. The portion 56 is sealed. The cover main body 56 may be formed integrally with a single steel plate or may be formed with a plurality of steel plates.

  3 is a perspective view of the portion shown in FIG. 2 as seen from the left side and slightly rearward, and FIG. 4 is a perspective view of the IV-IV section in FIG. In FIG. 3, the safety fence 39 is not shown in order to show the main part.

  As shown in FIG. 3 and FIG. 4, the guide portion 57 is continuous with the lower end portion of the cover main body portion 56, and is upstream of the cover main body portion 57 in the sorting conveyor transport direction (that is, rearward). It is inclined in a direction further down toward the side. The guide portion 57 is connected to the cover main body portion 56 only at the upper end portion (front end portion) and is separated from the conveyor frame 20 as the distance from the cover main body portion 56 increases. It is supported stably by connecting to. The inclination angle of the guide portion 57 is not particularly limited, and is appropriately determined depending on a rear end position of the cover main body portion 56, a target accumulation position (described later), a distance to be secured with the main body frame 11, and the like. Although adjusted, the lower end portion is within the range where the lower end portion is bent toward the rear side with respect to at least the cover main body portion 57 as described above.

  The bracket 60 that supports the guide portion 57 on the conveyor frame 20 is also used as a bracket that supports the return roller guard 61 attached to the conveyor frame 20. The return roller guard 61 is for preventing the operator's hand or clothes from getting caught between the return roller 62 and the return surface 23a that support the return surface 23a of the conveyor belt 23 of the discharge conveyor 2 from below. is there. The return roller 62 is located on the rear side of the return roller guard 61. The bracket 60 is an L-shaped member that extends forward from the return roller 62 and bends downward, and is fixed to lower portions of the left and right conveyor frames 20 by fixing means such as bolts. As a result, the space between the guide portion 57, the left and right brackets 60, and the return roller 62 is wide open as shown in FIG. The bracket 60 is L-shaped and the front and rear positions of the return roller 62 are retracted to the vicinity of the rear edge of the guide portion 57, so that the space between the return roller 62 and the guide portion 57 is widely opened.

  FIG. 5 is a plan view of the traveling body 1 as viewed from above.

  As mentioned before, the main body frame 11 has a plurality of steel materials such as frames 71L, 71R, 72L, 72R extending forward and backward, beams 73-76 extending left and right, and posts 77L, 77R extending vertically as shown in FIG. It is assembled in three dimensions. The rotating shaft 30 of the conveyor frame 20 is supported by brackets 78L and 78R on the rear posts 77L and 77R, and the bracket 37 for supporting the pin 36 (see FIG. 2) of the rod portion 33 of the support member 31 is a front portion. Is attached to the front surface of the beam 73.

  Due to such a framework structure, the main body frame 11 has a plurality of openings 81L, 81C, 81R, which can face the ground between the pair of left and right endless track crawlers 16 from above (the discharge conveyor 2 side). 82L, 82C, 82R, 83L, 83C, 83R exist. In the present embodiment, an opening 81C (a hatched portion) surrounded by the frames 71L and 71R, which are the front beams 73 and 74, is defined as the above-described “target accumulation position”. Therefore, the lower end portion of the guide portion 57 of the scattering prevention cover 55 is located above the opening 81 </ b> C at the front center of the main body frame 11. The width in the left-right direction of the guide portion 57 is approximately the same as that of the cover main body portion 56, but the width in the left-right direction of the opening 81C needs to be secured wider than that.

  In the present embodiment, the opening 81C is selected as the “target accumulation position”. However, as long as the length and angle of the guide portion 57 are within an appropriate range, the other portions between the left and right endless track crawler belts 16 are used. , For example, any one of the openings 81L, 81R, 82L, 82C, 82R, 83L, 83C, and 83R may be selected. It can also be said.

  As described above, as shown in FIGS. 1 and 2, the safety fence 39 is provided between the traveling body 1 and the discharge conveyor 2 from the viewpoint of safety. In the present embodiment, the safety fence 39 covers the side portion of the space between the discharge conveyor 2 and the main body frame 11 in such a manner as to avoid the side portion of the guide portion 56 of the scattering prevention cover 55. 55 guide portions 56 are exposed on the side of the machine body.

  The operation of the self-propelled vibrating screen having the above configuration will be described.

  For example, when an object to be sorted is thrown into the sieving device 3 by an input heavy machine such as a hydraulic excavator, a recycling machine, a belt conveyor or the like, a material having a particle size smaller than the sieving particle size by the sieving member passes through the sieving member and is conveyed to the discharge conveyor 2. It is guided onto the surface, conveyed forward by the discharge conveyor 2, and discharged forward of the machine body. On the other hand, those larger than the selected particle size descend on the sieve member and are discharged to the rear of the machine body.

  At this time, not all of the selected items on the transport surface of the discharge conveyor 2 are discharged at the discharge end of the discharge conveyor 2, but a part of the sorted matter is returned to the belt surface while adhering to the belt surface. While moving to the tail pulley side, it falls from the return surface 23a. Therefore, if no countermeasures are taken, as the sorting operation progresses, the sorting items that fall from the return surface 23a of the conveyor belt 23 accumulate on the power pack 4, detracting from aesthetics and requiring an extra cleaning operation. . In addition, when deposits of the sorts on the power pack 4 are left for a long period of time, the deposits superimposed on the power packs 4 come into contact with the return surface 23a of the conveyor belt 23, and the sorts are scattered (diffused). In the case of extreme occurrence, there is a possibility that the selected item is caught in each part of the discharge conveyor 2.

  Therefore, in the present embodiment, as described above, the anti-scattering cover 55 having the two functional components of the cover main body portion 56 and the guide portion 57 is provided. By providing the anti-scattering cover 55, the selected item falling from the belt return surface 23a toward the power pack 4 is received by the cover body 56, and the accumulation of the selected item on the power pack 4 is suppressed. The selected item received by the cover main body 56 is transferred toward the guide portion 57 on the rear side of the machine body down the cover body part 56 due to vibration of the machine during operation, contact with the return surface 23a of the conveyor belt 23, or the like. The Then, the sorted material that has reached the guide portion 57 slides down on the guide portion 57 and is guided to the opening portion 81C of the main body frame 11, passes through the opening portion 81C, and falls to the ground between the left and right traveling means 10. Is accumulated there.

  Sorted items accumulated between the left and right traveling apparatuses 10 are joined to the sorted items discharged from the discharge end of the discharge conveyor 2 or removed by cleaning. In this case, by driving the traveling means 10 and moving the self-propelled vibrating screen backward (in some cases, moving forward), the surroundings of the collected items can be widely opened. Needless to say, even when a heavy machine or the like is used, the sorted product can be easily recovered.

  Therefore, according to the present embodiment, it is possible to suppress the deposit of the selected item on the power pack 4 and, consequently, unnecessary diffusion of the selected item. Accordingly, the opportunity for cleaning the power pack 4 can be reduced, the burden of cleaning the scattered sorting can be reduced, and further, one factor of biting the sorting into the discharge conveyor 2 can be suppressed. .

  Further, when the operation is stopped, for example, if the user stands at the opening 82C at the center of the main body frame 11 and faces the front, the gap between the guide 57, the return roller 62, and the left and right brackets 60 is opened. The anti-scattering cover 55 can be easily cleaned. Further, as described above, since the safety fence 39 on the side of the machine body is erected so as to avoid the scattering prevention cover 55, the guide part 57 is included from the side of the machine body without entering the lower side of the discharge conveyor 2. Each part of the scattering prevention cover 55 can be accessed and can be flexibly adapted to the cleaning work.

2 Discharge conveyor 3 Sieve device 4 Power pack 10 Traveling means 11 Main body frame 20 Conveyor frame 30 Rotating shaft 39 Safety fence 55 Splash prevention cover 56 Cover main body part 57 Guide part 60 Bracket 61 Return roller guard 62 Return rollers 81C, L, R Openings 82C, L, R Openings 83C, L, R Openings

Claims (3)

A pair of left and right traveling means, a main body frame provided on these traveling means, a discharge conveyor provided on the main body frame, a sieve device provided on the upper side of the discharge conveyor, and provided on the lower side of the discharge conveyor A power pack and a splash prevention cover provided at the bottom of the discharge conveyor,
The main body frame has an opening that can face the left and right traveling means from above,
The scattering prevention cover has a cover main body portion that is inclined downward toward the upstream side in the conveying direction of the selection by the discharge conveyor, and a guide portion that is continuous with a lower end portion of the cover main body portion,
The cover main body covers the upper side of the power pack,
The guide portion is further inclined downward toward the upstream side in the transport direction with respect to the cover main body portion, and a lower end portion thereof is located above the opening portion of the main body frame. Self-propelled vibrating screen.   The bracket that supports the guide portion of the scattering prevention cover to the frame of the discharge conveyor is also used as a bracket that attaches a guard member of a return roller that supports the return surface of the conveyor belt of the discharge conveyor to the frame of the discharge conveyor. The self-propelled vibrating screen according to claim 1. The discharge conveyor is tiltably connected to the main body frame,
A safety fence is provided on both sides of the main body frame so as to cover the side portion of the space between the discharge conveyor and the main body frame and to expose the guide portion of the anti-scattering cover to the side of the machine body. The self-propelled vibrating screen according to claim 1 or 2, characterized by the above.

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