JP2007307503A - Screen - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screen which can be small in height size in its transportation and also can smoothly introduce a sorted substance selected by a screening apparatus to a discharge conveyer without making the sorted substance adhere to a chute. <P>SOLUTION: A movable-side chute 34 is arranged in a screening apparatus 25 while a fixing-side chute 32 is arranged at the discharge conveyer 14, and the fixing-side chute 32 and the movable-side chute 34 are superimposed upwards and downwards. Therefore, even though the lower end side of the screening apparatus 25 approaches the discharge conveyer 14, the height size of the screening apparatus 25 in transportation can be kept small without an interference of the fixing-side chute 32 and the movable-side chute 34. Further, the width size of the fixing-side chute 32 arranged at the discharge conveyer 14 can be reduced according to the state that the movable-side chute 34 is arranged in the screening apparatus 25, adhesion of the sorted substance, fell down from the screening apparatus 25, to the fixing-side chute 32 can be controlled and therefore the sorted substance can be smoothly introduced to the discharge conveyer 14. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a screen that is suitably used for sorting objects to be sorted such as earth and sand, crushed stone, and wood chips according to the size (grain size) of grains.

  In general, a large amount of excavated soil including earth and sand and crushed stone is generated at work sites such as construction work and civil engineering work. Then, in order to reuse the generated excavated residual soil as a backfill material and a foundation ground material, a soil improvement machine is known that generates improved soil by mixing the excavated residual soil with a soil improving material such as quicklime and cement.

  In this case, it is necessary to select the size (granularity) of crushed stones, earth and sand, etc. contained in the excavation residual soil as a pre-operation for mixing the excavation residual soil and the soil improvement material by the soil improvement machine. And the screen which sorts into a thing larger than a fixed particle size and a fixed particle size or less by sieving these selection objects, such as crushed stone and earth and sand, is used suitably (for example, patent documents 1). reference).

JP 2005-296893 A

  The screen according to the prior art includes a frame that forms a support structure provided on a crawler type traveling body, a discharge conveyor that is provided on the frame and discharges a selection to the outside, and a frame that is positioned above the discharge conveyor. And a sieving device for adjusting the inclination angle by sieving the object to be sorted, and a chute provided between the discharge conveyor and the sieving device for guiding the sorted material dropped from the sieving device to the discharge conveyor. Configured. The screen is loaded on, for example, a trailer and transported to a work site, and performs a work of sorting sorting objects such as earth and sand at the work site.

  Here, when performing the sorting operation of earth and sand using the above-described screen, the earth and sand (sorting object) is put into a sieve device using a hydraulic excavator and the like, and the sieve device is vibrated. Thereby, earth and sand larger than a certain particle size and earth and sand below a certain particle size are sorted, and only the earth and sand (sorted matter) below a certain particle size falls from a sieve device toward a discharge conveyor. Then, the sorted product dropped from the sieving apparatus is guided onto the discharge conveyor by a chute provided between the discharge conveyor and the sieving apparatus, and then conveyed to a desired discharge place by the discharge conveyor.

  Further, the screen according to this prior art is attached to the frame so that one end side in the length direction of the sieving device can be rotated around the pin, and the mounting height with respect to the frame on the other end side in the length direction of the sieving device is changed. Thus, the tilt angle of the sieving device with respect to the horizontal direction can be adjusted. Then, for example, by appropriately adjusting the inclination angle of the sieving device according to the particle size and viscosity of the sorting object put into the sieving device, the sorting operation can be performed efficiently.

  By the way, when the screen is loaded on a trailer or the like and transported, the mounting height of the sieving device with respect to the frame on the other end side is lowered, and the inclination angle of the sieving device is adjusted to be substantially horizontal with respect to the ground. Therefore, it is desirable to keep the height dimension of the sieving device as small as possible.

  However, since the width of the discharge conveyor is usually smaller than the width of the sieving device, the screen according to the prior art is provided with a chute that sandwiches the discharge conveyor from the width direction, and the sorting that has fallen from the sieving device is sent to the discharge conveyor by the chute. It is necessary to guide. For this reason, the chute according to the prior art is normally inclined obliquely upward so as to gradually widen from the discharge conveyor toward the sieving device, and the width dimension between the upper ends thereof is formed larger than the width dimension of the sieving device. ing.

  Therefore, for example, if the mounting height of the sieving device with respect to the frame on the other end is too low, the lower end side of the sieving device and the upper end of the chute interfere with each other. There is a limit to it. Thus, with the screen according to the prior art, it is difficult to adjust the inclination angle of the sieving apparatus so as to be substantially horizontal with respect to the ground, and it is difficult to keep the height dimension of the sieving apparatus during transportation small. There's a problem.

  Moreover, the chute | shoot by a prior art is normally comprised by the wide metal plate extended toward a sieve apparatus from a discharge conveyor. For this reason, for example, when high-viscosity earth and sand are selected with a sieve device, the earth and sand that have fallen from the sieve device are likely to adhere to the surface of the chute and cannot be smoothly guided to the discharge conveyor. There is.

  The present invention has been made in view of the above-described problems of the prior art, can reduce the height dimension during transportation, and can be applied to a discharge conveyor without attaching the selected material selected by the sieving device to the chute. The object is to provide a screen that can be guided smoothly.

  In order to solve the above-described problems, the present invention provides a frame that forms a support structure, a discharge conveyor that is provided on the frame and discharges the selected items to the outside, and an inclination angle of the frame that is positioned above the discharge conveyor. A sieving device that is provided so as to be screened and screens the object to be sorted, and a chute that is provided between the discharge conveyor and the sieving device and guides the sorted material dropped from the sieving device to the discharge conveyor. Applied to the screen.

  The invention according to claim 1 is characterized in that the chute is provided on the discharge conveyor side and has a fixed upper chute that is wide at the upper end side toward the sieve device, and the fixed chute overlaps in the upward and downward directions. Thus, the movable side chute provided on the sieving device side is configured.

  According to a second aspect of the present invention, the fixed side chute is formed with a lower end side attached to the discharge conveyor and an upper end side being a free end smaller than the width of the sieve device, and the movable side chute has an upper end side of the sieve. The configuration is such that the lower end side is attached to the apparatus and the lower end side is a free end and fits inside the fixed side chute.

  According to a third aspect of the present invention, the fixed-side chute is constituted by a metal plate extending obliquely upward from the discharge conveyor toward the sieve device, and the movable chute is fixed to the sieve device at the upper end side. The lower end side is constituted by a flexible plate overlapping the fixed side chute.

  According to a fourth aspect of the present invention, the fixed-side chute is constituted by a metal plate extending obliquely upward from the discharge conveyor toward the sieve device, and the movable-side chute rotates to the sieve device at the upper end side. The lower end side is configured by a metal plate that can be attached and overlaps the fixed side chute.

  According to the first aspect of the present invention, the fixed side chute provided on the discharge conveyor side and the movable side chute provided on the sieve device side overlap each other in the upward and downward directions. Therefore, even if the lower end side of the sieving device approaches the discharge conveyor, the movable side chute and the fixed side chute can be prevented from interfering with each other. Therefore, by adjusting the inclination angle of the sieving device so that it is almost horizontal to the ground, the height of the sieving device during transportation can be kept as small as possible. For example, the screen is loaded on a trailer or the like. When carrying, complicated work such as removing the equipment to reduce the height of the entire machine can be eliminated, and workability can be improved.

  In addition, the width of the fixed side chute provided on the discharge conveyor side can be reduced by the amount of the movable side chute provided on the sieve device side. It is possible to control the selected items smoothly to the discharge conveyor.

  In addition, since the vibration due to the sieving operation of the sieving device is transmitted to the movable side chute, even if the selected item adheres to the movable side chute, the selected item can be separated from the movable side chute by the vibration and is selected by the sieving unit. The selected sort can be reliably guided to the discharge conveyor.

  According to the second aspect of the present invention, the upper end side (free end) of the fixed side chute is formed smaller than the width of the sieving device so that the inclination angle of the sieving device is adjusted to be substantially horizontal with respect to the ground When it does, the upper end side of a fixed side chute | shoot and the lower end side of a sieve apparatus can be overlapped. Thereby, the space | interval of a sieve apparatus and a discharge conveyor can be made small, and the height dimension of the sieve apparatus at the time of transport can be suppressed further smaller. In addition, by placing the lower end side of the movable side chute inside the fixed side chute, it is possible to smoothly pass the sorted item dropped from the sieve device from the movable side chute to the fixed side chute. It can be guided to the discharge conveyor.

  According to invention of Claim 3, even if the upper end side of a fixed side chute and the lower end side of a movable side chute contact | abut, for example by adjusting the inclination angle of a sieve apparatus at the time of transportation and making it approach the discharge conveyor side By deforming the movable chute made of a flexible plate, the distance between the sieving device and the discharge conveyor can be reduced, and the height of the sieving device during transportation can be kept small.

  On the other hand, when the interval between the sieving device and the discharge conveyor is increased to perform the sorting operation, the lower end side of the movable side chute made of a flexible plate extends to the discharge conveyor side by its own weight, and the upper end side of the fixed side chute And overlap in the up and down direction. Thereby, the selection thing which fell from the sieve apparatus can be reliably guided to the discharge conveyor by the movable side chute and the fixed side chute.

  According to the invention of claim 4, even if the upper end side of the fixed side chute and the lower end side of the movable side chute come into contact with each other by adjusting the inclination angle of the sieving device and making it approach the discharge conveyor side during transportation, for example. Since the upper end side of the movable side chute is pivotally attached to the sieve device, the lower end side of the movable side chute rotates upward, thereby reducing the interval between the sieve device and the discharge conveyor. The height dimension of the sieving device during transportation can be kept small.

  On the other hand, when the interval between the sieving device and the discharge conveyor is increased in order to perform the sorting operation, the lower end side of the movable side chute is rotated downward by its own weight and overlaps the upper end side and the upper side of the fixed side chute. Thereby, the selection thing which fell from the sieve apparatus can be reliably guided to the discharge conveyor by the movable side chute and the fixed side chute.

  Hereinafter, embodiments of a screen according to the present invention will be described in detail with reference to FIGS. 1 to 13 by taking a self-propelled screen as an example.

  1 to 11 show a first embodiment of the present invention. Here, in the figure, 1 indicates a self-propelled screen, and the self-propelled screen 1 is obtained by sieving selected objects such as crushed stone and earth and sand contained in excavated residual soil generated by civil engineering work. Sediment and the like are sorted into those larger than a certain particle size and those smaller than a certain particle size. And the self-propelled screen 1 is comprised by the below-mentioned traveling body 2, the frame 7, the side conveyor 13, the discharge conveyor 14, the sieve apparatus 25, the chute | shoot 31, etc.

  2 is a self-propelled crawler-type traveling body. The traveling body 2 is provided on one end side in the longitudinal direction of each side frame 3A, and a leg portion 3 provided with side frames 3A on both left and right sides. The driving wheel 4, the idler wheel 5 provided on the other side in the longitudinal direction of each side frame 3 </ b> A, and the left and right crawler belts 6 wound around the drive wheel 4 and the idler wheel 5 are roughly used. It is configured. And the traveling body 2 self-propels at the work site according to operation of the travel lever apparatus 11 mentioned later. In addition, a frame 7 described later is disposed on the leg 3 constituting the traveling body 2.

  Reference numeral 7 denotes a frame disposed on the leg 3 of the traveling body 2, and the frame 7 is formed in a frame shape extending in the front and rear directions using a steel material such as a square pipe, I-shaped steel, H-shaped steel or the like. It is formed and forms a strong support structure. Here, the frame 7 is roughly constituted by a base frame 8 fixed on the leg 3 and extending in the front and rear directions, and a support frame 9 fixed on the base frame 8 and extending in the front and rear directions. Yes. A power unit 10, a travel lever device 11 and the like which will be described later are provided on the base frame 8, and the support frame 9 is configured to support a sieve device 25, a side conveyor 13, a discharge conveyor 14 and the like which will be described later.

  Reference numeral 10 denotes a power unit disposed on one end of the base frame 8 in the length direction. The power unit 10 is, for example, an engine, a hydraulic pump driven by the engine, and supply / discharge of pressure oil from the hydraulic pump to various hydraulic actuators. It is comprised by the control valve (all are not shown) etc. which control this.

  Reference numeral 11 denotes a traveling lever device disposed on the base frame 8 together with the power unit 10, and the traveling lever device 11 is disposed adjacent to the power unit 10 as shown in FIG. The traveling operation of the screen 1 is controlled. In addition, an operation panel 12 is disposed in the vicinity of the travel lever device 11, and by operating the operation panel 12, operations of a side conveyor 13, a discharge conveyor 14, a sieve device 25, which will be described later, can be controlled. It has a configuration.

  Reference numeral 13 denotes a side conveyor provided on the other end in the length direction of the support frame 9, and the side conveyor 13 discharges foreign substances selected by a sieve device 25 described later to the outside. Here, as shown in FIGS. 1 to 4, the side conveyor 13 includes a base end side conveyor frame 13 </ b> A supported by the support frame 9 and a front end side conveyor that is foldably connected to the base end side conveyor frame 13 </ b> A. The frame 13B and a belt 13C that circulates along the conveyor frames 13A and 13B are roughly configured.

  The side conveyor 13 has a working posture that extends left and right from the other end in the length direction of the support frame 9 as shown in FIGS. 1 and 2, and a midway in the length direction as shown in FIGS. It is configured to be able to selectively switch from a part to a folded transport posture.

  That is, when the side conveyor 13 is in the working posture shown in FIGS. 1 and 2, the base end side conveyor frame 13 </ b> A and the front end side conveyor frame 13 </ b> B are linearly connected, and the other end in the length direction of the support frame 9. It is configured to extend left and right from the side. And the side conveyor 13 which became the working posture receives the foreign material which rolls down on the net | network member 27 of the sieve apparatus 25 mentioned later by the belt 13C, and makes the belt 13C circulate, and the foreign material is discharged to the outside. It is conveyed and discharged.

  On the other hand, when the side conveyor 13 is in the transportation posture shown in FIGS. 3 and 4, the base end side conveyor frame 13A and the front end side conveyor frame 13B are placed on the ground so that the belt 13C is substantially perpendicular to the ground. The base end side conveyor frame 13 </ b> A and the front end side conveyor frame 13 </ b> B are folded in a state of being rotated with respect to FIG. Thereby, the front end side conveyor frame 13 </ b> B can be compactly accommodated in the side of the sieving device 25 in a state of extending in the front and rear directions along the support frame 9. As described above, by setting the side conveyor 13 in the transport posture, the workability when the self-propelled screen 1 is loaded on a trailer or the like and transported is improved.

  Reference numeral 14 denotes a discharge conveyor provided on the support frame 9. The discharge conveyor 14 discharges the selected material selected by a sieve device 25 described later to the outside. As shown in FIGS. 1 to 4 and the like, the discharge conveyor 14 is attached to the support frame 9 and is inclined obliquely upward from the lower side of the sieving device 25 and extends in the front and rear directions. The distal end side conveyor frame 16 is connected to the distal end side of the proximal end side conveyor frame 15 so as to be rotatable upward and downward, and is rotatably provided at the other end side in the longitudinal direction of the proximal end side conveyor frame 15. A proximal end roller 17, a distal end roller 18 rotatably provided at one end in the longitudinal direction of the distal end side conveyor frame 16, and a plurality of portions provided between the proximal end roller 17 and the distal end side roller 18. The intermediate rollers 19, and a belt 20 that circulates between the proximal roller 17 and the distal roller 18 while being guided by the intermediate rollers 19.

  Here, as shown in FIGS. 6 and 7, etc., the proximal-side conveyor frame 15 has left and right side plates 15A, 15A having L-shaped cross sections facing each other across the belt 20, and each of these side plates 15A. On the upper surface side, inclined surfaces 15B that are inclined obliquely downward toward the belt 20 are provided. And each inclination surface 15B of the base end side conveyor frame 15 becomes a structure by which the below-mentioned fixed side chute | shoot 32 is provided.

  1 and 2, the discharge conveyor 14 has a working posture in which the proximal conveyor frame 15 and the distal conveyor frame 16 extend obliquely upward in a straight line from the lower side of the sieve device 25, and FIG. As shown in FIG. 4, the front end side conveyor frame 16 can be selectively switched to the transport posture extending in the horizontal direction from the front end of the base end side conveyor frame 15.

  Here, when the discharge conveyor 14 is in the working posture shown in FIGS. 1 and 2, the sorting object falling from the sieving device 25 is received by the belt 20, and the belt 20 is circulated to remove the sorting object from the outside. It is configured to be transported to a discharge location and discharged. On the other hand, when the discharge conveyor 14 is in the transport posture shown in FIGS. 3 and 4, the front conveyor frame 16 is bent horizontally from the front end of the proximal conveyor frame 15, so that the ground height of the discharge conveyor 14 is increased. The structure can be made as low as possible.

  Reference numeral 21 denotes a gantry provided on the support frame 9, and the gantry 21 supports a sieve device 25 described later so that the angle of the sieving device 25 can be adjusted with respect to the ground. Here, as shown in FIGS. 5 and 9, etc., the gantry 21 is positioned on the support frame 9 and extends forward and rearward, and a front frame 21A is erected on the lower frame part 21A. , Rear support posts 21B and 21B, and an upper frame portion 21C which is fixed to the upper end portion of each support post 21B and extends in the front and rear directions.

  The other end in the length direction of the lower frame portion 21A is attached to the upper surface side of the support frame 9 so as to be pivotable upward and downward using a fulcrum pin 22, and one end side in the length direction of the lower frame portion 21A. An angle adjusting mechanism 23 to be described later is provided between the support frame 9 and the support frame 9.

  Reference numeral 23 denotes an angle adjustment mechanism provided between one end side in the length direction of the lower frame portion 21 </ b> A constituting the gantry 21 and the support frame 9, and the angle adjustment mechanism 23 is a length direction of the gantry 21 with respect to the support frame 9. The inclination angle of the gantry 21 is adjusted around the fulcrum pin 22 by adjusting the mounting height on one end side stepwise.

  Here, the angle adjusting mechanism 23 includes a frame-side bracket 23A that extends upward from the upper surface side of the support frame 9, and a plurality of pin insertion holes 23B and 23B that are formed in the frame-side bracket 23A so as to be spaced apart upward and downward. ,..., And a base bracket 23C provided on the lower surface side of the lower frame portion 21A constituting the base 21, and any one of the pin insertion holes 23B and a pin 23D inserted into the base side bracket 23C. It is configured.

  Then, by selectively inserting the pin 23D into any one of the pin insertion holes 23B and the gantry side bracket 23C, the other end side in the length direction of the gantry 21 is moved upward and downward with the fulcrum pin 22 as the center. 1 and 5, the gantry 21 is tilted with respect to the ground as shown in FIGS. 1 and 5 and a horizontal position almost horizontal with respect to the ground as shown in FIGS. It is the structure which can be made to incline with.

  Reference numeral 24 denotes an elevating cylinder located between the support frame 9 and the gantry 21 in the vicinity of the angle adjusting mechanism 23. The elevating cylinder 24 is connected to one end in the length direction of the support frame 9 and the gantry 21 (upper frame). 21C) and one end side in the length direction. Therefore, by extending and retracting the elevating cylinder 24 with the pin 23D of the angle adjusting mechanism 23 removed, one end in the longitudinal direction of the gantry 21 is rotated (lifted / lowered) about the fulcrum pin 22 as an angle. The position can be easily adjusted when the pin 23D is inserted into any one of the pin insertion holes 23B of the adjustment mechanism 23 and the mounting bracket 23C.

  25 is a sieving device which is located above the discharge conveyor 14 and is provided on the support frame so that the inclination angle can be adjusted. The sieving device 25 sifts the object to be sorted such as crushed stone, earth and sand, wood chips, etc. For example, the object to be sorted is sorted into a thing larger than a certain particle size (contaminant) and a certain particle size or smaller (sorted material).

  Here, as shown in FIGS. 5 to 8, etc., the sieving device 25 has front and rear directions by left and right side plates 26A, 26A and a plurality of beam members 26B, 26B,... A frame 26 formed in a box shape extending in the direction of the frame 26, a grid-like net member 27 sandwiched between the side plates 26A of the frame 26 and extending in the front and rear directions, and a frame attached to the side plate 26A of the frame 26 The main body 26 and the vibration member 28 that applies vibration to the net member 27 are roughly configured. The frame body 26 is elastically supported via front and rear rubber springs 29 and 29 on both ends in the length direction of the lower frame portion 21 </ b> A constituting the gantry 21. As a member that elastically supports the frame body 26, a coil spring may be used instead of the rubber spring 29.

  Thus, the sieving device 25 is supported by the support frame 9 via the gantry 21, and the sieving device 25 is supported by adjusting the height of one end side in the length direction of the gantry 21 by the angle adjusting mechanism 23. With the pin 22 as the center, the inclination angle is between an inclined position inclined with respect to the ground as shown in FIGS. 1 and 5 and a horizontal position almost horizontal with respect to the ground as shown in FIGS. It can be adjusted.

  The sieve device 25 is put on the mesh member 27 by operating the vibrating body 28 to vibrate the frame body 26 and the mesh member 27 in the inclined position shown in FIGS. 1 and 5. The sorting object such as earth and sand is sieved, and the sorting object is classified into a large particle size that cannot pass through the grid of the mesh member 27 (contamination) and a small particle size that can pass through the grid of the mesh member 27 (sorted object). ), The foreign matter is sent out to the side conveyor 13 side, and the sorted matter is dropped to the discharge conveyor 14.

  Reference numeral 30 denotes a hopper provided on the upper side of the sieving device 25. The hopper 30 guides an object to be sorted such as earth and sand onto the net member 27 of the sieving device 25. Here, the hopper 30 is attached to the upper frame portion 21 </ b> C constituting the gantry 21, and expands in a funnel shape upward from the sieve device 25. Thereby, for example, sorting objects such as earth and sand dropped from above the sieve device 25 using a hydraulic excavator or the like are guided by the hopper 30 onto the net member 27.

  Reference numeral 31 denotes a chute provided between the discharge conveyor 14 and the sieving device 25, and the chute 31 guides the sorted material dropped from the sieving device 25 to the discharge conveyor 14. And the chute | shoot 31 is comprised by the fixed side chute | shoot 32 mentioned later and the movable side chute | shoot 34, as shown in FIG.

  32 and 32 are left and right fixed side chutes provided on each side plate 15A of the base end side conveyor frame 15 constituting the discharge conveyor 14, and each fixed side chute 32 is, for example, as shown in FIG. It is formed using a metal plate such as a steel plate material, and has a substantially V-shaped cross-sectional shape and extends in the front and rear directions. And the lower end side of each fixed side chute 32 is fixed to the inclined surface 15B of the side plate 15A constituting the base end side conveyor frame 15 by means of welding or the like, and the upper end side of each fixed side chute 32 is a sieve device. Inclined so as to gradually become wider toward 25.

  Here, as shown in FIGS. 7 and 11, the width dimension A between the upper ends of the left and right fixed chutes 32 is larger than the width dimension B of the belt 20 of the discharge conveyor 14, and the width of the sieving device 25. It is set smaller than the dimension (width dimension between the side plates 26A of the frame 26) C (C> A> B). As a result, as shown in FIGS. 9 to 11, even if the sieving device 25 moves to the horizontal position and the sieving device 25 and the proximal end conveyor frame 15 of the discharge conveyor 14 approach, The lower end portion of each side plate 26A of the frame body 26 and the upper end portion of each fixed-side chute 32 can be overlapped in the upward and downward directions, and the interference between them can be prevented.

  Reference numerals 33 and 33 denote left and right skirt covers provided on the respective side plates 15A of the proximal conveyor frame 15 below the fixed chutes 32. These skirt covers 33 are made of, for example, rubber material or resin. It is formed in a flat plate shape extending in the front and rear directions using a flexible material such as a material, leather material, or woven material, and is fixed to the inclined surface 15B of each side plate 15A. Each skirt cover 33 extends obliquely downward from the lower end portion of the inclined surface 15B toward the belt 20 of the discharge conveyor 14, and closes the gap formed between the lower end portion of the inclined surface 15B and the belt 20. Thus, the selected item is prevented from falling off the belt 20 through the gap.

  Reference numerals 34 and 34 denote left and right movable chutes that are detachably provided on each side plate 26A of the frame body 26 constituting the sieving device 25 using bolts or the like (not shown). For example, it is formed as a flat flexible plate extending in the front and rear directions using a flexible material such as a rubber material, a resin material, a leather material, and a woven material. The upper ends of the movable chutes 34 are fixed to the lower ends of the side plates 26A constituting the frame body 26, and the lower ends of the movable chutes 34 are free ends. It is inclined and extended so that it becomes gradually narrow.

  And as shown in FIG. 7, the width dimension D between the lower end parts of each movable side chute 34 is formed smaller than the width dimension A between the upper end parts of each fixed side chute 32 (A> D). Therefore, the lower end side of each movable chute 34 is a free end and overlaps the upper end side of each fixed chute 32 in the upper and lower directions, and is accommodated inside the fixed chute 32.

  As a result, the sorted matter that has passed through the mesh member 27 of the sieving device 25 can be smoothly transferred from each movable side chute 34 to each fixed side chute 32, and this sorted matter can be transferred to the belt 20 of the discharge conveyor 14. It has a configuration that can be surely guided. Moreover, since the vibration by the vibrating body 28 is always transmitted to the movable side chute 34 attached to the sieving device 25, even if a selected item adheres to the movable side chute 34, the selected item is separated by vibration to ensure that The discharge conveyor 14 can be guided to the belt 20.

  On the other hand, as shown in FIGS. 9 to 11, when the sieving device 25 moves to the horizontal position and the sieving device 25 and the proximal conveyor frame 15 of the discharge conveyor 14 approach each other, the upper end of the fixed chute 32 is fixed. The part abuts on the movable chute 34, but the movable chute 34 made of a flexible plate can be easily deformed (see FIG. 11). Thereby, the space | interval of the sieve apparatus 25 and the base end side conveyor frame 15 of the discharge conveyor 14 can be made as small as possible, and the sieve apparatus 25 in order to transport the self-propelled screen 1 as shown in FIG. Is set to a horizontal position, the ground height H of the upper end portion of the hopper 30 provided on the upper side of the sieving device 25 can be reduced.

  The self-propelled screen 1 according to the present embodiment has the above-described configuration. When the self-propelled screen 1 is used to sort an object to be sorted such as earth and sand, first, the operator uses a travel lever device. By operating 11, the self-propelled screen 1 is self-propelled to a desired work place and stopped.

  Next, as shown in FIG. 1 and FIG. 2, the side conveyor 13 is shifted to a working posture extending leftward and rightward, and the discharging conveyor 14 is linearly inclined upward from the lower side of the sieve device 25. To migrate. Moreover, the inclination which inclined with respect to the ground as shown in FIG.1 and FIG.5 centering | focusing on the fulcrum pin 22 by adjusting the height of the one end side of the length direction of the mount frame 21 by the angle adjustment mechanism 23. Move to position.

  In this state, while the vibrating body 28 of the sieving device 25 is operated and the side conveyor 13 and the discharge conveyor 14 are operated, earth and sand are put into the hopper 30 using a hydraulic excavator (not shown). As a result, the sieving device 25 sifts the earth and sand introduced onto the net member 27 by the hopper 30, and the earth and sand are large in size (contamination) that cannot pass through the lattice of the net member 27, and the net member 27. Sort into small particles (sorted material) that can pass through the grid.

  And the foreign material which cannot pass the mesh member 27 of the sieve apparatus 25 rolls down on the inclined mesh member 27, and is sent out to the side conveyor 13 side. Then, the side conveyor 13 receives the contaminants rolled down from the mesh member 27 of the sieving device 25 by the belt 13C, and circulates the belt 13C, thereby discharging the impurities from the front end of the front end side conveyor frame 13B to the outside. To do.

  On the other hand, the selections that have passed through the mesh member 27 of the sieving device 25 are fixed to each movable side chute 34 attached to the frame 26 of the sieving device 25 and to the base end side conveyor frame 15 of the discharge conveyor 14. It is guided by the side chute 32 and falls onto the belt 20 of the discharge conveyor 14.

  In this case, as shown in FIG. 7, the width dimension D between the lower ends of the movable chutes 34 is formed smaller than the width dimension A between the upper ends of the fixed chutes 32. The lower end side is housed inside the fixed side chute 32 while overlapping the upper end side of each fixed side chute 32 in the upward and downward directions. As a result, the sorted matter that has passed through the mesh member 27 of the sieving device 25 can be smoothly delivered from each movable side chute 34 to each fixed side chute 32, and this sorted matter can be transferred to the belt 20 of the discharge conveyor 14. It can be surely guided.

  In addition, the width of each fixed-side chute 32 provided on the discharge conveyor 14 can be reduced by the amount that the movable-side chute 34 is provided on the sieve device 25, so that the selected items dropped from the sieve device 25 are fixed-side chute 32. It can suppress adhering to. Furthermore, since the vibration by the vibrating body 28 is always transmitted to the movable side chute 34 attached to the sieving device 25, even if the selected item adheres to the movable side chute 34, the selected item can be detached by vibration. . As a result, the selected item selected by the sieving device 25 can be reliably guided to the belt 20 of the discharge conveyor 14.

  Then, the discharge conveyor 14 receives the sorted material that has passed through the mesh member 27 of the sieving device 25 and dropped by the belt 20, and rotates the belt 20 so that the sorted material is removed from the front end of the front end conveyor frame 16 to the outside. To discharge.

  Next, when the above-described sorting operation is completed and the self-propelled screen 1 is loaded on a trailer or the like and transported, the side conveyor 13 is moved to the proximal conveyor frame 13A as shown in FIGS. And the front-end side conveyor frame 13B are moved to a folded transport posture and accommodated in the side of the sieve device 25, and the discharge conveyor 14 is moved horizontally from the front end of the base-end side conveyor frame 15 to the front-end side conveyor frame 16 in the horizontal direction. Shift to an extended transport posture.

  Further, the sieving device 25 is adjusted to be substantially horizontal with respect to the ground as shown in FIGS. 3 and 9 by adjusting the height of one end in the length direction of the gantry 21 by the angle adjusting mechanism 23 as shown in FIGS. Move to the horizontal position. In this case, when the sieve device 25 moves from the inclined position to the horizontal position, the sieve device 25 and the proximal conveyor frame 15 of the discharge conveyor 14 approach each other as shown in FIGS.

  On the other hand, in this embodiment, each movable side chute 34 attached to the sieving device 25 and each fixed side chute 32 attached to the base end side conveyor frame 15 of the discharge conveyor 14 overlap in the upward and downward directions. And the width dimension A between the upper end parts of each fixed side chute | shoot 32 is formed smaller than the width dimension C between each side board 26A of the frame 26 which comprises the sieve apparatus 25. As shown in FIG. Thereby, the movable side chute 34 and the fixed side chute 32 do not interfere with each other, and the lower end side of the frame body 26 constituting the sieving device 25 and the fixed side chute 32 do not interfere with each other. Even if the upper end portion of the fixed chute 32 abuts on the movable chute 34, the movable chute 34 made of a flexible plate can be easily deformed.

  As a result, the distance between the sieving device 25 and the base end side conveyor frame 15 of the discharge conveyor 14 can be made as small as possible, and the sieving device 25 is used to transport the self-propelled screen 1 as shown in FIG. , The ground height H of the upper end portion of the hopper 30 provided on the upper side of the sieving device 25 can be lowered. As a result, when the self-propelled screen 1 is loaded and transported on a trailer or the like, a complicated operation such as removing equipment such as the hopper 30 in order to reduce the height of the entire machine can be eliminated. Thereby, workability | operativity when carrying and carrying the self-propelled screen 1 on a trailer etc. can be improved.

  Thus, according to the present embodiment, the chute 31 provided between the sieving device 25 and the discharge conveyor 14 is replaced by the fixed side chute 32 provided on the discharge conveyor 14 and the movable side chute 34 provided on the sieving device 25. The fixed side chute 32 and the movable side chute 34 are configured to overlap in the upward and downward directions.

  Thereby, even if the lower end side of the sieving device 25 approaches the discharge conveyor 14 by adjusting the inclination angle of the sieving device 25 so as to be substantially horizontal with respect to the ground, the fixed side chute 32 and the movable side chute 34 Can be prevented from interfering with each other. Therefore, as shown in FIG. 3, by moving the sieving device 25 to the horizontal position, the height dimension of the sieving device 25 during transportation can be suppressed as small as possible, and the self-propelled screen 1 can be used as a trailer or the like. Therefore, it is possible to eliminate the troublesome work of removing the equipment in order to reduce the height of the entire machine when loading and transporting the machine, and the workability can be improved.

  In addition, the width of the fixed side chute 32 provided on the discharge conveyor 14 can be reduced by the amount of the movable side chute 34 provided on the sieve device 25, so that the selected matter dropped from the sieve device 25 adheres to the fixed side chute 32. Therefore, it is possible to smoothly guide the selection to the discharge conveyor 14.

  Moreover, since the vibration due to the sieving operation of the sieving device 25 is transmitted to the movable side chute 34, even if the selected item adheres to the movable side chute 34, the selected item can be detached from the movable side chute 34 by vibration, The sorted matter sorted by the sieving device 25 can be reliably guided to the discharge conveyor 14.

  Next, FIGS. 12 and 13 show a second embodiment of the present invention. The feature of this embodiment is that the movable side chute is attached to the sieving device so that the upper end side is pivotable and the lower end side is a free end. This is because it is made of a metal plate. In the present embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

  In the figure, reference numeral 41 denotes a chute according to the present embodiment provided between the discharge conveyor 14 and the sieving device 25. The chute 41 is used for the present embodiment in place of the chute 31 according to the first embodiment. It was. Here, the chute 41 includes a fixed chute 32 and a movable chute 42 described later, but the configuration of the movable chute 42 is different from that according to the first embodiment.

  42 and 42 are left and right movable chutes provided on the respective side plates 26A of the frame body 26 constituting the sieving device 25. The movable chutes 42 are formed by using a metal plate such as a steel plate, for example, It is formed in a flat plate shape extending in the rear direction (the length direction of the discharge conveyor 14). Here, the upper end side of the movable chute 42 is fixed to a hinge member 43 attached to the lower end portion of the side plate 26A using a bolt or the like. The lower end side of the movable side chute 42 is a free end that can be rotated upward and downward about the hinge member 43, and is inclined and extended toward the fixed side chute 32 so as to gradually become narrower. Yes.

  In this case, the width dimension E between the lower ends of each movable chute 42 is formed smaller than the width dimension A between the upper ends of each fixed chute 32 (A> E). Accordingly, the lower end side of each movable chute 42 is configured to overlap the upper end side of each fixed chute 32 in the upward and downward directions.

  The chute 41 according to the present embodiment has the movable side chute 42 as described above. As shown in FIG. 12, when performing sorting work such as earth and sand with the sieve device 25 as an inclined position, the lower end of each movable side chute 42 is used. Since the side overlaps with the upper end side of each fixed side chute 32 in the upward and downward directions, the sorted matter that has passed through the mesh member 27 of the sieving device 25 is smoothly received from each movable side chute 42 to each fixed side chute 32. This sort can be reliably guided to the belt 20 of the discharge conveyor 14.

  In this case, the lower end side of each movable side chute 42 abuts on the inner side surface of each fixed side chute 32 by rotating about the hinge member 43 by its own weight. For this reason, there is no gap between each movable side chute 42 and each fixed side chute 32, and it is possible to reliably prevent the selected item from flying out of the chute 41.

  On the other hand, when the sieving device 25 is moved from the inclined position shown in FIG. 12 to the horizontal position shown in FIG. 13 during transportation, even if the upper end portion of each fixed-side chute 32 abuts on each movable-side chute 42, it is movable. The side chute 42 can be rotationally displaced upward about the hinge member 43.

  As a result, the distance between the sieving device 25 and the base end side conveyor frame 15 of the discharge conveyor 14 can be made as small as possible, and the sieving device 25 is used to transport the self-propelled screen 1 as shown in FIG. , The ground height H of the upper end portion of the hopper 30 provided on the upper side of the sieving device 25 can be lowered. As a result, when the self-propelled screen 1 is loaded and transported on a trailer or the like, a complicated operation such as removing equipment such as the hopper 30 in order to reduce the height of the entire machine can be eliminated. Thereby, workability | operativity when carrying and carrying the self-propelled screen 1 on a trailer etc. can be improved.

  In each of the above-described embodiments, the self-propelled screen 1 including the traveling body 2 is described as an example. However, the present invention is not limited to this, and can be applied to, for example, a stationary screen that does not have the traveling body 2. In this case, a stationary screen can be configured by installing a base made of a strong frame on the ground instead of the traveling body 2 and attaching the frame 7 on the base.

  Moreover, in embodiment mentioned above, the discharge conveyor 14 is comprised so that it may extend diagonally upward from the lower side of the sieve apparatus 25. FIG. However, the present invention is not limited to this, and for example, a discharge conveyor extending in the horizontal direction from the lower side of the sieve device 25 may be used.

  Furthermore, in embodiment mentioned above, the case where the side conveyor 13 for discharging | emitting the foreign material sorted by the sieve apparatus 25 to a desired discharge | emission location is provided is illustrated. However, the present invention is not limited to this, and for example, the side conveyor 13 may not be provided, and the sorted impurities may be directly discharged from the sieve device 25 to the ground.

It is a front view shown in the state where the self-propelled screen by the 1st embodiment of the present invention was made into a work posture. It is a top view shown in the state where a self-propelled screen was made into a work posture. It is a front view shown in the state which made the self-propelled screen into the transportation posture. It is a top view shown in the state where a self-propelled screen was made into a transportation posture. It is an enlarged front view which shows the support frame, sieve apparatus, discharge conveyor, etc. in FIG. It is a perspective view which shows the sieve apparatus in FIG. 5, a discharge conveyor, a fixed side chute, a movable side chute, etc. It is sectional drawing which looked at the sieve apparatus, the discharge conveyor, the fixed side chute | shoot, the movable side chute | shoot, etc. from the arrow VII-VII direction in FIG. It is sectional drawing which looked at the sieve apparatus, the discharge conveyor, the fixed side chute | shoot, the movable side chute | shoot, etc. from the arrow VIII-VIII direction in FIG. FIG. 4 is an enlarged front view showing a support frame, a sieve device, a discharge conveyor and the like in FIG. 3. It is a perspective view which shows the sieve apparatus, discharge conveyor, fixed side chute, movable side chute, etc. in FIG. It is sectional drawing which looked at the sieve apparatus, the discharge conveyor, the fixed side chute | shoot, the movable side chute | shoot, etc. from the arrow XI-XI direction in FIG. It is sectional drawing similar to FIG. 7 which shows the fixed side chute | shoot, movable side chute | shoot, etc. by 2nd Embodiment. It is sectional drawing similar to FIG. 11 which shows the fixed side chute | shoot, movable side chute | shoot, etc. by 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Self-propelled screen 7 Frame 8 Base frame 9 Support frame 13 Side conveyor 14 Discharge conveyor 15 Base end side conveyor frame 16 Front end side conveyor frame 20 Belt 21 Mounting base 22 Supporting pin 23 Angle adjustment mechanism 25 Sieve device 26 Frame body 27 Net member 30 Hopper 31, 41 Chute 32 Fixed Chute 34, 42 Movable Chute

Claims (4)

A frame that forms a support structure, a discharge conveyor that is provided on the frame and discharges the sorting object to the outside, and is provided on the upper side of the discharge conveyor so that the inclination angle of the frame can be adjusted, and the sorting object is sieved In a screen comprising a sieving device for sorting, and a chute that is provided between the discharge conveyor and the sieving device and guides the sorted matter dropped from the sieving device to the discharge conveyor,
The chute is provided on the discharge conveyor side and has a fixed-side chute having a wide upper end toward the sieve device, and a movable provided on the sieve device side so as to overlap the fixed-side chute in the upper and lower directions. A screen characterized by comprising a side chute. The fixed side chute is formed with a lower end side attached to the discharge conveyor and an upper end side being a free end smaller than the width of the sieving device,
2. The screen according to claim 1, wherein the movable side chute is configured such that an upper end side is attached to the sieving device and a lower end side is a free end and is accommodated inside the fixed side chute. The fixed-side chute is constituted by a metal plate extending obliquely upward from the discharge conveyor toward the sieve device,
The screen according to claim 1 or 2, wherein the movable side chute is configured by a flexible plate having an upper end fixed to the sieve device and a lower end overlapping the fixed chute. The fixed-side chute is constituted by a metal plate extending obliquely upward from the discharge conveyor toward the sieve device,
The screen according to claim 1, wherein the movable side chute is configured by a metal plate having an upper end side rotatably attached to the sieve device and a lower end side overlapping the fixed side chute.

Images