JP2011230011A - Vibrating screen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibrating screen allowing a screen member to be easily fixed regardless of the thickness of the screen member and securing the predetermined tension of the screen member.SOLUTION: The vibrating screen includes a frame-like device body 31; brackets 63 protrusively provided at the internal wall surfaces of side walls 68, 69 of the device body 31; the screen member 61 whose ends are placed on the brackets 62 and formed with hook parts 74 folded upward; clamping members 64 engaged with the hook parts 74 of the screen member 61; clamping bolts 65 clamping the clamping members 64 toward the side walls 68, 69 of the device body 31 and pulling the hook parts 74 to apply tension to the screen member 61; reaction receiving members 66 restricting the upper parts of the clamping members 64; and fixing bolts 67 fixing the reaction receiving members 66 to the device body 31. The reaction receiving member 66 is constituted to be variable in distances L1, L2 from the fixing position with the fixing bolt 67 to a pressing position of the clamping member 64.

Description

  The present invention relates to a vibrating screen that sorts an object to be sorted according to particle size.

  The vibrating screen is for classifying various kinds of rocks, construction wastes, etc. generated at a construction site by vibrating a sieve member. As a conventional structure for fixing the sieving member to the vibrating screen, for example, the end of the sieving member is placed on the floor frame protruding from the inner wall of the side plate of the vibrating screen main body, and the end of the sieving member is formed in a hook shape. There are some which hold the part with a clamp bar and further fix with a clamp bolt (see Patent Document 1, etc.).

Japanese Patent Laying-Open No. 2005-305248 (FIG. 5)

  However, for example, in a mesh-like sieving member, if the mesh becomes rough, a thick wire is used to ensure strength. For example, the wire diameter of the wire changes depending on the selected particle size, and thus the thickness changes depending on the selected particle size. If the thickness of the sieve member changes, the height of the inner surface of the hook part relative to the floor frame and the clamp bar and the position in the plane direction also change, so strictly speaking, the optimum clamping position of the sieve member also changes. For example, when the thickness of the sieve member is increased, there is a problem that the clamp bar smoothly competes with the hook portion of the sieve member and becomes difficult to enter. In the past, the movement of the hook part could be absorbed by the deformation of the clamp bar and clamp bolt, but if the sieve member was fixed in a state where it competed with the clamp bar, the sieve member did not receive the desired tension and the sieve member was loosened. Or it may cause damage.

  An object of the present invention is to provide a vibrating screen capable of easily fixing a sieve member regardless of the thickness of the sieve member and ensuring a prescribed tension of the sieve member.

  In order to achieve the above object, the first invention includes a frame-shaped device main body, a bracket projecting on the inner wall surface of the side wall of the device main body, an end portion placed on the bracket, A sieve member that forms a hook part with its end folded back upward, a clamp member that engages with the hook part of the sieve member, and tightening the clamp member toward the side wall of the apparatus body, and pulling the hook part A clamp bolt that applies tension to the sieve member, a reaction force receiving member that restrains an upper portion of the clamp member, and a fixing bolt that fixes the reaction force receiving member to the apparatus main body, the reaction force receiving member includes: The distance from the fixing position by the fixing bolt to the pressing position of the clamp member is configured to be variable.

  In a second aspect based on the first aspect, the reaction force receiving member is a long member extending in the longitudinal direction of the apparatus main body, and has two long sides from the center of the through hole of the fixing bolt. The length of each vertical line is different from each other.

  In a third aspect based on the first aspect, the reaction force receiving member is a quadrangular member, and the lengths of the perpendiculars from the center of the through hole of the fixing bolt to the pair of upper and lower opposite sides are different. It is characterized by being.

  According to a fourth invention, in the first invention, the reaction force receiving member is a quadrangular member, and the lengths of the vertical lines from the center of the through hole of the fixing bolt to the four sides are different from each other. Features.

  According to a fifth invention, in the third or fourth invention, the reaction force receiving member has a notch for identifying a mounting posture with respect to the apparatus main body.

  According to a sixth aspect of the present invention, there is provided a frame-shaped device main body, a bracket projecting from the inner wall surface of the side wall of the device main body, and an end portion placed on the bracket and the end portion folded upward Clamping member that forms a portion, a clamping member that engages with the hook portion of the sieving member, a clamp that tightens the clamping member toward the side wall of the apparatus main body, and pulls the hook portion to apply tension to the sieving member A bolt and a reaction force receiving member that restrains an upper portion of the clamp member, and the reaction force receiving member is provided on an inner wall surface of the apparatus main body, and is arranged in a vertical direction to lock the upper portion of the reaction force receiving member. A plurality of grooves or protrusions are provided.

  According to the present invention, the sieve member can be easily fixed regardless of the thickness of the sieve member, and the prescribed tension of the sieve member can be ensured.

It is a side view showing the whole vibration screen composition concerning a 1st embodiment of the present invention. It is a top view showing the whole vibration screen composition concerning a 1st embodiment of the present invention. It is a side view showing the whole structure at the time of storage of the vibrating screen which concerns on 1st Embodiment of this invention. It is a top view showing the whole structure at the time of storage of the vibrating screen which concerns on 1st Embodiment of this invention. It is a perspective view showing the external appearance structure of the sieve apparatus with which the vibrating screen which concerns on 1st Embodiment of this invention was equipped. It is an enlarged view of the A section of FIG. It is the rear view which looked at the A section of FIG. 5 from back. It is a figure showing a mode that the clamp position by the reaction force receiving member was changed in the vibration screen which concerns on 1st Embodiment of this invention, and is a figure corresponding to FIG. It is a perspective view showing the principal part of the sieve apparatus with which the vibrating screen which concerns on 2nd Embodiment of this invention was equipped, and is a figure corresponding to FIG. 5 of 1st Embodiment. It is an enlarged view of one structural example of the reaction force receiving member provided in the vibrating screen which concerns on 2nd Embodiment of this invention. It is a figure showing a mode that the clamp position by the reaction force receiving member was changed in the vibrating screen which concerns on 2nd Embodiment of this invention. It is an enlarged view of the other structural example of the reaction force receiving member with which the vibrating screen which concerns on 2nd Embodiment of this invention was equipped. It is a perspective view showing the principal part of the sieve apparatus with which the vibrating screen which concerns on 3rd Embodiment of this invention was equipped, and is a figure corresponding to FIG. 5 of 1st Embodiment. It is a figure showing a mode that the clamp position by the reaction force receiving member was changed in the vibrating screen which concerns on 3rd Embodiment of this invention. It is the figure showing the other example of the attachment method of the reaction force receiving member with which the vibration screen which concerns on 3rd Embodiment of this invention was equipped, and its comparative example. It is a perspective view showing the principal part of the sieve apparatus with which the vibrating screen which concerns on 4th Embodiment of this invention was equipped, and is a figure corresponding to FIG. 5 of 1st Embodiment. It is the rear view which looked at the part shown in FIG. 16 from back, and is a figure corresponding to FIG. 7 of 1st Embodiment. It is a perspective view showing the principal part of the sieve apparatus with which the vibrating screen which concerns on 5th Embodiment of this invention was equipped, and is a figure corresponding to FIG. 5 of 1st Embodiment. It is the rear view which looked at the part shown in FIG. 18 from back, and is a figure corresponding to FIG. 7 of 1st Embodiment.

  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 vibrating screen according to the first embodiment of the present invention, and FIG. 2 is a plan view thereof. 3 is a side view showing the entire configuration of the vibrating screen of FIG. 1 when stored, and FIG. 4 is a plan view thereof. 3 and 4, the conveyor belts of the over conveyor 6 and the middle conveyor 7 described later are not shown. Further, when viewing the drawings in accordance with the direction of the reference numerals, the right and left in FIGS. 1 to 4 are the front and rear of the aircraft, and the upper and lower sides in FIGS. 2 and 4 are the left and right of the aircraft.

  The vibrating screen shown in FIGS. 1 to 4 includes a traveling body 1, a hopper conveyor 3 that is a receiving unit for receiving an object to be sorted, a main conveyor 4 that conveys the object to be sorted received on the hopper conveyor 3, and A screening device 5 that screens the material to be sorted discharged from the main conveyor 4 into three particle sizes according to the particle size, an over conveyor 6 that carries out the sorted material having the largest particle size screened by the screening device 5, and a sieve The middle conveyor 7 for carrying out the medium-sized screened product screened by the device 5, the under-conveyor 8 for transporting the screened material having the smallest particle size screened by the screen device 5, and the power source of the mounted equipment are incorporated. A power unit (power device) 9 is provided.

  The traveling body 1 includes a pair of left and right traveling devices 10 and a main body frame 11 provided on the traveling devices 10. The traveling device 10 includes 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 traveling hydraulic motor 15 having an output shaft connected to the drive wheels 14, and left and right slave frames, respectively. An endless track crawler belt 16 wound around the driving wheel 13 and the driving wheel 14 is provided. The main body frame 11 is connected to the upper part of the track frame 12 and extends in the front-rear direction.

  The hopper conveyor 3 includes a hopper 21 that receives an object to be sorted, and a feed conveyor 22 (see FIG. 2) accommodated in the hopper 21. The front end portion of the hopper 21 is fixed on the rear end portion of the main body frame 11, and the portion exceeding the rear half protrudes rearward from the main body frame 11. The inner wall surface of the hopper 21 is inclined so as to reduce the diameter downward, and plays a role of guiding the object to be sorted onto the conveying surface of the feed conveyor 22. One feed conveyor 22 extends substantially horizontally forward. In addition, an outrigger 23 is provided at the rear end portion of the hopper 21 protruding from the main body frame 11, and the aircraft body is stably supported by installing the outrigger 23 on the ground even during sorting work involving vibration. Further, a chipping grit (fixed sieve) 24 is provided on the upper portion of the hopper 21. The chipping grit 24 is inclined so that the screen surface is lowered in the right direction of the machine body, and drops large foreign matters such as rocks and gravel remaining on the screen surface when the object to be sorted is thrown to the right side of the machine body.

  The main conveyor 4 supplies the object to be sorted conveyed by the feed conveyor 22 to the sieving device 5, and the front end of the sieving surface of the sieving device 5 from the base end located below the discharge end of the feed conveyor 22. It extends upwardly to the discharge end located above the vicinity. The main conveyor 4 includes a conveyor frame 26, a head pulley and a tail pulley (not shown) rotatably provided at both front and rear ends of the conveyor frame 26, and a conveyor belt 27 (see FIG. 2) wound around the head pulley and the tail pulley. And a main conveyor hydraulic motor 28 connected to the head pulley, and the main pulley hydraulic motor 28 drives the head pulley to circulate and drive the conveyor belt 27 between the head pulley and the tail pulley. Further, the base end side of the conveyor frame 26 is connected to the left and right frames 25 of the hopper conveyor 3 so as to be swingable up and down via a rotation shaft (not shown). The discharge end side of the conveyor frame 26 is connected to the base frame 35 of the sieving device 5 via a link arm 29. The conveyor frame 26 extends linearly from the base end to the discharge end during operation, but when moving, the discharge end side is relative to the base end side with the pin 30 (see FIG. 3) as a fulcrum at a joint part in the middle. The structure can be bent downward.

  The sieving device 5 sorts an object to be classified into three particle sizes by upper and lower two-stage sieving members (see FIG. 5 and the like) mounted inside the frame-shaped device main body 31. The apparatus main body 31 is supported on the base frame 35 of the sieving apparatus 5 through an elastic body (for example, a spring) so as to be vibrated. The rear side of the base frame 35 is connected to a support member 32 fixed to the front portion of the main body frame 11 via a rotation shaft (not shown). The support member 32 protrudes upward with respect to the main body frame 11, and the rotation shaft of the sieving device 5 is located in the vicinity of the upper end portion of the support member 32. The front side of the base frame 35 is connected to the support member 32 via a support rod 33. In addition, the upper and lower sieve members mounted on the apparatus main body 31 have a coarser upper stage than the lower stage, and the selected product of the largest particle size group (denoted appropriately as oversize) is placed on the upper sieve member. Of the sorted materials that have passed through the upper sieve member, the relatively large particle size group (denoted appropriately as middle size) remains on the lower sieve member, respectively, and the smallest particle size group (denoted as undersize as appropriate). ) Passes through the lower stage. The posture of the sieving device 5 during operation is downward and downwardly inclined (see FIG. 1), and the sieving surfaces of the upper and lower sieving members are inclined in the rearward direction. Therefore, the oversize remaining on the upper and lower sieving members and The middle-sized sort descends on the sieve surface as the apparatus main body 5 vibrates. The undersized sorting that has passed through the lower sieve member passes through the sieve device 5 and falls downward.

  The configuration of the sieving device 5 will be further described later.

  The over conveyor 6 conveys the oversized sorting that has been moved and dropped on the sieving surface of the upper sieving member of the sieving device 5 and discharges it to the side of the machine body (to the left in this example). It is arranged to stand up diagonally toward. The over conveyor 6 includes a conveyor frame 36, a conveyor belt 37 wound around a head pulley and a tail pulley (not shown) rotatably provided at both ends of the conveyor frame 36, and an over conveyor hydraulic motor connected to the head pulley. 38 and a hopper 39 provided on the conveyor frame 36 so that the chute 34 extending from the discharge end of the upper sieve member of the sieving apparatus 5 faces, and the head pulley is driven by the over conveyor hydraulic motor 38. As a result, the conveyor belt 37 is circulated and driven between the head pulley and the tail pulley, and the oversized sorting received by the hopper 39 is carried out to the side (left side) of the machine body. Further, the base end portion of the conveyor frame 36 is connected to the main body frame 11 through a rotation shaft (not shown) so as to be able to swing up and down, and by an over conveyor swing cylinder (not shown). Swings up and down. In addition, the conveyor frame 36 is bent at the left side (the rear side of the machine body) in the transporting direction of the selected item with respect to the base end side with a pin (not shown) as a fulcrum at the joint part in the middle, At the time of movement or the like, the discharge end side is folded backward by the over conveyor storage cylinder (not shown) (see FIG. 3).

  The middle conveyor 7 is configured to convey the middle-sized sorting that has been moved and dropped on the sieve surface of the lower sieve member of the sieving device 5 and discharge it to the side of the machine body (to the right in this example). It is located in front of 6. The middle conveyor 7 has substantially the same configuration as the over conveyor 6, and includes a conveyor frame 41, a conveyor belt 42 that is rotatably provided at both ends of the conveyor frame 41 and a tail pulley (not shown), and a head A middle conveyor hydraulic motor 43 connected to the pulley, and a hopper (not shown) provided on the conveyor frame 36 so that a chute (not shown) extending from the discharge end of the lower sieve member of the sieve device 5 faces. The conveyor belt 42 is circulated between the head pulley and the tail pulley by driving the head pulley with the middle conveyor hydraulic motor 43, and the middle-size sorting received by the hopper is laterally (right). To be taken out. Further, the base end portion of the conveyor frame 41 is connected to the main body frame 11 through a rotation shaft (not shown) so as to be able to swing up and down, and by a middle conveyor swing cylinder (not shown). Swings up and down. In addition, the conveyor frame 41 is bent at the joint part in the middle, with the pin 44 (see FIG. 3) as a fulcrum, and the discharge end side can be bent to the right side (rear side of the machine body) in the direction of transporting the selected item. During movement or the like, the discharge end side is folded backward by the middle conveyor storage cylinder 45 (see FIG. 3) (see FIG. 3).

  The under conveyor 8 conveys the undersized sorting that has passed through the lower sieve member of the sieving device 5 and discharges it to the front of the machine body. The under conveyor 8 includes a conveyor frame 51, a conveyor belt 52 wound around a head pulley and a tail pulley (not shown) rotatably provided at both ends of the conveyor frame 51, and an under conveyor hydraulic motor connected to the head pulley. 53, by driving the head pulley by the under conveyor hydraulic motor 53, the conveyor belt 52 is driven to circulate between the head pulley and the tail pulley, and the undersized sorting is carried forward of the machine body. Further, the base end portion of the conveyor frame 51 is connected to an intermediate portion in the vertical direction of the support member 32 at the front portion of the main body frame 11 so as to be swingable up and down via a rotation shaft (not shown). Yes. The intermediate portion of the conveyor frame 51 is connected to the base frame 35 of the sieving device 5 via the support rod 55 in the vicinity of the lower end portion of the support member 32 via the sieving device oscillating cylinder 54. As the cylinder 54 expands and contracts, the under conveyor 8 swings up and down together with the sieve device 8 and the main conveyor 4. The under conveyor 8 is also configured such that the discharge end side can be bent upward via a pin 56 with respect to the base end side, and the base end side vicinity of the base end side via the under conveyor swing cylinder 57 is the base of the sieving device 5. While being connected to the frame 35, the discharge end side is connected to the base end side via an under conveyor storage cylinder 58. Along with the expansion and contraction of the under conveyor swing cylinder 57, the under conveyor 8 swings up and down independently of the main body frame 11 separately from the sieving device 5 and the main conveyor 4, and as the under conveyor storage cylinder 58 expands and contracts. The discharge end side of the under conveyor 8 swings up and down with respect to the base end side.

  The power unit 9 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, and the like, and is mounted above the traveling device 10 on the main body frame 11. The power unit 9 is located between the hopper conveyor 3 and the over conveyor 6.

  5 is a perspective view showing an external configuration of the sieving device 5, FIG. 6 is an enlarged view of a portion A in FIG. 5, and FIG. 5 and 6 illustrate the case where the present invention is applied to the upper sieve member 61 of the upper and lower sieve members 61, 62, the present invention is also applicable to the lower sieve member 62.

  The sieve device 5 shown in FIGS. 5 to 7 includes a frame-shaped device main body 31, and left and right brackets 63 (only the left one is shown in FIG. 6) as floor frames attached to the inner wall surface of the device main body 31. , A sieve member (upper stage) 61 mounted on the left and right brackets 63, left and right clamp members 64 (only the left one is shown) for clamping the sieve member 61, and a plurality of clamps for fixing the clamp members 64 A bolt 65, a reaction force receiving member 66 that presses the clamp member 64, and a fixing bolt 67 that fixes the reaction force receiving member 66 are provided.

  The apparatus main body 31 is formed in a frame shape with side walls 68 and 69 on the left and right side walls and a plurality of support beams (not shown) extending left and right connecting the side walls 68 and 69. Support portion rackets 71 and 72 are provided at two positions on the outer wall surfaces of the side walls 68 and 69, respectively. The support portion rackets 71 and 72 are elastic bodies on the base frame 35 (see FIG. 1) of the sieve device 5. The apparatus main body 31 is supported on the base frame 35 so as to be able to vibrate. Although not shown, the side walls 68 and 69 are penetrated by eccentric shafts (not shown) extending left and right. The eccentric shaft is positioned between the upper and lower sieve members 61 and 62 and is rotatably supported by bearings with respect to the side walls 68 and 69. The eccentric shaft is a rotating body whose center of gravity is deviated from the center of rotation, and vibrates the apparatus main body 31 by being rotationally driven by a vibration motor (not shown) provided on one (right side in this example) side wall 69. . A cover 73 protects the vibration motor and is attached to the side wall 69.

  The bracket 63 is configured by an L-shaped member such as an angle member, and the long side portion is bolted (or welded) on the inner wall of the side walls 68 and 69 of the apparatus main body 31 with the short side portion facing up. It is fixed. The upper surface of the short side portion is a mounting surface of the sieve member 61, and protrudes from the inner wall surfaces of the side walls 68 and 69 of the apparatus main body 31 along the sieve surface of the sieve member 61. The bracket 63 extends in the front-rear direction, but one bracket 63 may extend over the entire length of the screen surface of the apparatus main body 31, or a plurality of brackets 63 may be arranged in the front-rear direction. Further, the bracket 63 is not limited to a configuration that is continuous in the front-rear direction, and may be a configuration that exists intermittently.

  The left and right ends of the sieving member 61 are folded upward to form a hook portion 74, and the hook portion 74 is supported on the bracket 63 by being placed on the bracket 63. The inside of the hook portion 74 is protected by a protection member 75 for friction resistance. At this time, tension members 76 are provided on the device body 31 of the sieving device 5 at appropriate intervals in the left-right direction. The tension member 76 is supported by the apparatus main body 31 via a support member (not shown) so that the upper surface of the tension member 76 slightly protrudes above the bracket 63. As will be described later, the left and right ends (hook portions 74) of the sieve member 61 are pressed against the bracket 63 by the clamp member 64 and the like, so that the central portion of the sieve member 61 is pressed against the tension member 76, and tension is applied from below. By being applied, the sieve member 61 is in a state of being tensed upward in a convex shape. Further, although the single sieve member 61 can be configured to form the entire upper sieve surface, in consideration of workability at the time of replacement, etc. in this embodiment, three sieve members 61 are arranged in the front-rear direction as shown in FIG. The case where the sheet member 61 of a sheet is put in order and the upper sieve surface is comprised is illustrated. In FIGS. 5 and 6, the sieve members 61 and 62 are simply illustrated in a plate shape, but are actually net-like members, for example.

  The clamp member 64 is a hook-shaped member that engages with the hook portion 74 of the sieve member 61, and a plurality of clamps in a state where the tip portion (returned portion) 77 in the cross section is hooked on the hook portion 74 of the sieve member 61. The bolt 65 is fixed to the side walls 68 and 69 of the apparatus body 31. The clamp bolt 65 is tightened by a nut 78 provided on the outer wall side of the side walls 68 and 69 of the apparatus main body 31. As a result, the clamp member 64 is tightened toward the side walls 68 and 69, and the hook portion 74 is pulled to the outside (side walls 68 and 69 side) via the clamp member 64 to apply tension to the sieve member 61. The diameter of the through hole (not shown) of the clamp bolt 65 provided in the clamp member 64 and the side walls 68 and 69 is larger than the diameter of the clamp bolt 65, and a gap is interposed between the clamp bolt 65 and the clamp bolt 65. In addition, the assembly is facilitated and a slight change in the position of the clamp member 64 up and down and front and rear during assembly is allowed. Further, the three sieve members 61 can be pressed together by one clamp member 64 on each of the left and right sides, but in this embodiment, one clamp member 64 on each of the left and right sides of the one sieve member 61, that is, left and right The case where three clamp members 64 are arranged side by side is illustrated.

  The reaction force receiving member 66 restrains the upper part of the clamp member 64, and is fixed to the inner wall surfaces of the side walls 68 and 69 of the apparatus main body 31 by a plurality of fixing bolts 67 and nuts 79. In this embodiment, the reaction force receiving member 66 is a long rectangular member (flat bar shape) extending in the longitudinal direction of the apparatus main body 31, and has two upper and lower long sides (an upper surface and a lower surface in FIG. 7). The pressing surfaces 81 and 82 of the clamp member 64 are formed. Further, when viewed in the short side direction of the reaction force receiving member 66 (vertical direction in FIG. 7), the center of the through hole of the fixing bolt 67 is offset from the center C of the reaction force receiving member 66 in the short side direction. The distances (vertical lengths) L1 and L2 (L1 <L2 in this example) from the center of the through hole (not shown) of the fixing bolt 67 to the pressing surfaces 81 and 82 are different. As a result, the reaction force receiving member 66 is turned upside down and attached to the side walls 68 and 69 of the apparatus main body 31, so that the distance from the fixing position by the fixing bolt 66 to the pressing position (pressing surface) of the clamp member 64 is two. The structure is variable in stages. In addition, the three clamp members 64 can be pressed together by one reaction force receiving member 66 on each of the left and right sides, but in this embodiment, one reaction force is exerted on one clamp member 64 on each of the left and right sides. The case where the receiving member 66, ie, the three reaction force receiving members 66 on each of the left and right sides, are used side by side is illustrated.

  In addition, although description of the support structure of the lower sieve member 62 is abbreviate | omitted, it can also be set as a well-known structure and can also be set as the structure to which this invention is applied similarly to the upper sieve member 61. FIG.

  Next, operations and effects of the vibration screen having the above-described configuration will be described in sequence.

  For example, when an object to be sorted is put into the chipping grit 24 by an input heavy machine such as a hydraulic excavator, a large rock or gravel is removed by the chipping grit 24 and discharged to the right side of the machine, and the object to be sorted that has passed the chipping grit 24 Is received by the hopper 21. The objects to be sorted received by the hopper 21 are carried out of the hopper 21 by the feed conveyor 22, transferred to the main conveyor 4 in front, and supplied to the sieving device 5. The material to be sorted supplied to the sieving device 5 is subjected to particle size sorting by upper and lower sieving members 61, 62, and the oversized sorter of the largest particle size group from the upper sieving member 61 is conveyed on the conveying surface of the over conveyor 6. On the conveying surface of the middle conveyor 7, the middle-size grouped product of the middle particle size group from above the lower sieve member 62 and the undersize of the smallest particle size group that has passed the lower sieve member 62 on the conveying surface of the under conveyor 8. Are sorted out and carried to the left, right and front of the machine by the conveyors 6-8, respectively.

  Here, the upper and lower sieving members 61 and 62 of the sieving device 5 correspond to the sorting particle size of the objects to be sorted, that is, according to the particle size for classifying “oversize”, “middle size”, and “undersize” in this embodiment. It must be replaced with an appropriate eye size. For example, in the case of a mesh member having a small mesh (lattice shape), it is configured by knitting thin strands in order to ensure the aperture ratio. For example, a mesh member having a large mesh has a necessary and sufficient strength. Also in the sense of securing, it is constructed by knitting thick strands. Thus, since the wire diameters of the strands of the sieve members 61 and 62 change depending on the size of the eyes, the thickness tends to change depending on the selected particle size.

  For example, when the thickness of the sieve member 61 changes, strictly speaking, the optimum clamp position of the sieve member 61 also changes. For example, if the sieve member 61 in FIG. 7 is a net-like member having a relatively fine mesh and a thin wire diameter, the distal end portion 77 of the clamp member 77 has entered near the base of the hook portion 74. When it is replaced with a thicker one, it becomes difficult for the clamp member 64 to enter the hook portion 74. In this case, the deformation of the clamp member 64 and the clamp bolt 65 can absorb the change in the engagement position between the hook portion 74 and the clamp member 64, but the hook portion 74 and the clamp member 64 are competing with each other. When the sieve member 61 is fixed, a desired tension is not applied to the sieve member 61, and the sieve member 61 may be loosened or damaged.

  Therefore, in the present embodiment, since the reaction force receiving member 66 that restrains the upper end position of the clamp member 64 is provided with the two pressing surfaces 81 and 82 having different lengths L1 and L2 from the center of the fixing bolt 67, for example, When the sieve member 61 of FIG. 7 is replaced with a sieve member 61 ′ having a large wire diameter as shown in FIG. 8, the reaction force receiving member 66 is turned upside down and the holding surface 81 is applied to the clamp member 64, thereby The restraining position (height with respect to the bracket 63) of the upper end of the member 64 can be changed. Therefore, in any of the sieve members 61 and 62 'having different thicknesses, the clamp member 64 can be smoothly hung on the hook portion 74, and the sieve members 61 and 61' can be easily fixed. Further, the specified tension can be secured in any of the sieve members 61 and 62 'having different thicknesses. Moreover, the tension load ratio to the clamp bolt 65 can be reduced by the reaction force receiving member 66.

  FIG. 9 is a perspective view showing a main part of the sieving device provided in the vibrating screen according to the second embodiment of the present invention, and corresponds to FIG. 5 of the first embodiment. FIG. 10 is an enlarged view of the reaction force receiving member provided in the vibrating screen according to the second embodiment of the present invention. In these drawings, the same parts as those in the previous drawings are denoted by the same reference numerals as those in the previous drawings, and the description thereof will be omitted.

  This embodiment is different from the first embodiment in that the reaction force receiving member 66A is provided intermittently. That is, the reaction force receiving member 66A shown in FIG. 9 and FIG. 10 is a quadrangular member (which may be rectangular but may be rectangular in this embodiment) having R or chamfered corners at four corners. The distances (vertical lengths) L3 and L4 from the center O of the through hole 66a of the fixing bolt 67 to the pressing surfaces 81A and 82A that are a pair of upper and lower sides are different. In the present embodiment, the distance from the center O of the through hole 66a to the two opposite sides other than the pressing surfaces 81A and 82A is the same or similar. Further, in each of the left and right side walls 68 and 69 of the sieving device body 31, the reaction force receiving members 66A adjacent in the front-rear direction are separated without being continuous. Furthermore, a notch 83 is provided as a means for identifying the mounting posture with respect to the apparatus main body 31 on any pressing surface (the pressing surface 82A in the present embodiment) of the reaction force receiving member 66A. The other configuration is the same as that of the first embodiment.

  Also in this embodiment, since the pressing position of the clamp member 64 can be changed as shown in FIG. 11 by turning each reaction force receiving member 66A upside down, the same effect as in the first embodiment can be obtained. . In the case of this embodiment, since the reaction force receiving member 66A is intermittent, there is an effect of reducing the material. Further, even if the fixing bolt 67 is not completely removed, the reaction force receiving member 66A can be rotated by loosening and releasing the tightening of the reaction force receiving member 66A, so that workability is further improved. In addition, the ability to identify at a glance which of the pressing surfaces 81A and 82A is holding the clamp member 64 by the notch 83 contributes to securing good workability.

  Also, unlike the long shape fixed with a plurality of fixing bolts 67 as in the first embodiment, in the case of this embodiment, the four sides are held down as shown in FIG. Can be used as a surface. That is, in addition to the upper and lower pressing surfaces 81A and 82A (upper and lower surfaces in the drawing), the left and right pressing surfaces 81B and 82B (left and right surfaces in the drawing) can be used. , 82B (perpendicular lengths) L5, L6 (L5 <L6) are further different from the distances (perpendicular lengths) L3, L4 to the holding surfaces 81A, 82A (in this embodiment) L5 <L3 <L4 <L6), the pressing position of the clamp member 64 can be changed in four ways, and the width corresponding to the thickness of the sieve member 61 is increased.

  In order to be able to identify the mounting posture of the reaction force receiving member 66A with respect to the apparatus main body 31, it is not limited to the notch 83, but may be marked or displayed by some method such as coloring, stamping, pasting, machining, or the like. Conceivable.

  Further, in this example, the reaction force receiving member 66A is formed in a quadrangular shape so that the clamp position can be changed in four stages. However, by selecting a triangular or pentagonal or more polygonal shape, the clamp position options can be changed as needed. It can be increased or decreased by the number.

  FIG. 13 is a perspective view showing a main part of the sieving device provided in the vibrating screen according to the third embodiment of the present invention, and corresponds to FIG. 5 of the first embodiment. In this figure, the same parts as those in the above-mentioned drawings are denoted by the same reference numerals as those in the above-mentioned drawings, and description thereof is omitted.

  The present embodiment is different from the first embodiment in that the reaction force receiving member 66B is formed in a circular shape. That is, in the reaction force receiving member 66B shown in FIG. 13, the through hole (not shown) of the fixing bolt 67 is offset with respect to the center thereof, and from the center of the through hole (not shown) of the fixing bolt 67. The distance to the outer peripheral surface (pressing surface) in contact with the clamp member 64 is configured to continuously change by rotating around the fixing bolt 67. In the example of FIG. 13, when the reaction force receiving member 66B is viewed from the direction in which the fixing bolt 67 is inserted, the center of the through hole of the fixing bolt 67 is on the center line perpendicular to the clamp member 64 of the reaction force receiving member 66B. It is fixed in the position located in. Further, as in the second embodiment, the reaction force receiving members 66B adjacent in the front-rear direction are separated without being continuous. Other configurations are the same as those of the first embodiment.

  Also in the present embodiment, the pressing position of the clamp member 64 can be changed as shown in FIG. 14 by adjusting the fixing angle of each reaction force receiving member 66B (FIG. 14 is reversed from the attached state of FIG. 13). The same effect as in the first embodiment can be obtained. In the case of this embodiment, since the reaction force receiving member 66B is intermittent, there is an effect of reducing the material. Further, even if the fixing bolt 67 is not completely removed, the reaction force receiving member 66B can be rotated by loosening and releasing the tightening of the reaction force receiving member 66B, so that the workability is further improved. Furthermore, since the pressing position of the clamp member 64 can be adjusted steplessly, the change in the thickness of the sieve member 61 can be dealt with more flexibly. In addition, as with the cutout 83 in the second embodiment, if an index (such as an angle scale) that can identify the fixed angle is provided, the pressing position of the clamp member 64 can be identified at a glance.

  In the present embodiment, the reaction force receiving member 66B is illustrated as being circular, but may be elliptical. In the case of an ellipse, the fixing angle of the reaction force receiving member is not necessarily offset from the center of the reaction force receiving member, even if the through hole is provided in the center of the reaction force receiving member. The clamp position can be changed with.

  FIG. 15A is a view showing another example of how to attach the circular reaction force receiving member 66B of the present embodiment, and FIG. 15B is a view showing a comparative example thereof.

  In this embodiment, the line of action of the load F received by the reaction force receiving member 66B from the clamp member 64 is the center of the reaction force receiving member 66B passing through the contact point P1 of the reaction force receiving member 66B with the clamp member 64 and the center point P2. Substantially equal to line C. When the reaction force receiving member 66 </ b> B rotates by receiving an external force, the center of rotation is the center O of the fixing bolt 67. Therefore, when the center O of the fixing bolt 67 is on the center line C of the reaction force receiver 66B, the center of rotation is on the action line (or in the vicinity of the action line) of the load F from the clamp member 64. In this case, no rotation moment is generated, or the value is small enough to be restrained by the fastening force of the fixing bolt 67.

  However, when the center O of the fixing bolt 67 is displaced from the center line C of the reaction force receiving member 66B as shown in FIGS. 15A and 15B, the load F from the clamp member 64 is received. Thus, a rotational moment M is generated in the reaction force receiving member 66B. At this time, as shown in FIG. 15B, the rotational moment M of the reaction force receiving member 66B acts in the direction opposite to the fastening direction of the fixing bolt 67 (usually clockwise), that is, in the direction of loosening the fixing bolt 67. In this case, when the rotational moment M exceeding the fastening torque of the fixing bolt 67 is applied, the fixing bolt 67 is loosened and the reaction force receiving member 66B is unconstrained.

  Accordingly, as shown in FIG. 15A, the reaction force receiving member 66B is fixed so that the rotational moment M of the reaction force receiving member 66B is generated in the direction in which the fixing bolt 67 is tightened in response to the external force F from the clamp member 64. Thus, even if a rotational moment M exceeding the tightening torque of the fixing bolt 67 is generated, the torque required to further tighten the fixing bolt 67 resists the moment M and suppresses the rotation of the reaction force receiving member 66B. Can do.

  As a measure for suppressing the rotation of the reaction force receiving member 66B, in addition to selecting the positional relationship of the contact P1 with respect to the fixing bolt 67 in consideration of the direction of the rotational moment M as described in FIG. It is also conceivable that pins or other bolts are added as fixing means for the receiving member 66B, and the reaction force receiving member 66B is fixed to the side walls 68, 69 of the apparatus main body 31 with the added fixing means and the fixing bolt 67. In this case, by providing a plurality of pin holes (or bolt holes) around the center O of the fixing bolt 67, the posture of the reaction force receiving member 66B can be adjusted stepwise. Further, when the pin hole (or bolt hole) is an arc-shaped long hole centered on the center O of the fixing bolt 67, the posture of the reaction force receiving member 66B can be adjusted steplessly.

  FIG. 16 is a perspective view showing a main part of a sieving device provided in a vibrating screen according to a fourth embodiment of the present invention, and FIG. 17 is a rear view of the part shown in FIG. It is a figure corresponding to FIG.5 and FIG.7 of embodiment. In these drawings, the same parts as those in the above-described drawings are denoted by the same reference numerals as those in the above-mentioned drawings, and the description thereof is omitted.

  This embodiment is different from the first embodiment in that the reaction force receiving member 66C is not a member that is attached to and detached from the apparatus main body 31 with the fixing bolt 67, but on the inner wall surfaces of the side walls 68 and 69 of the apparatus main body 31 in the vertical direction. This is in that a plurality of grooves are provided. That is, the reaction force receiving member 66C shown in FIGS. 16 and 17 is composed of a plurality of (two in this embodiment) grooves having different heights from the bracket 63 and extending in parallel in the front-rear direction. The clamp bolt 64 is tightened in a state where the upper end portion of the clamp member 64 is locked and the tip portion 77 of the clamp member 64 is hooked on the hook portion 74 of the sieve member 61. Thereby, the upper end of the clamp member 64 is restrained, and the reaction force of the clamp member 64 is received by the reaction force receiving member 66C. 16 and 17 show the state in which the clamp member 64 is locked in the lower groove, but if the upper member is switched to the upper groove, the pressing position of the clamp member 64 is changed (in this case, it is increased). Can do. Other configurations are the same as those of the first embodiment.

  Also in this embodiment, since the pressing position of the clamp member 64 can be changed, the same effect as the first embodiment can be obtained. Moreover, since it can comprise by grooving the side walls 68 and 69, there also exists an effect of material reduction. In addition, unlike the above-described embodiment, the work of loosening or tightening the fixing bolt 67 is not necessary, so that workability is further improved.

  18 is a perspective view showing a main part of a sieving device provided in a vibrating screen according to a fifth embodiment of the present invention. FIG. 19 is a rear view of the part shown in FIG. It is a figure corresponding to FIG.5 and FIG.7 of embodiment. In these drawings, the same parts as those in the above-described drawings are denoted by the same reference numerals as those in the above-mentioned drawings, and the description thereof is omitted.

  The present embodiment is different from the first embodiment in that the reaction force receiving member 66D is not a member that is attached to and detached from the apparatus main body 31 with the fixing bolt 67, but the inner wall surfaces of the side walls 68 and 69 of the apparatus main body 31 in the vertical direction. Is a plurality of protrusions. That is, the reaction force receiving member 66D shown in FIGS. 18 and 19 has a plurality of (two in this embodiment) square bar-like members that are different in height from the bracket 63 and extend in parallel in the front-rear direction. The upper end portion of the clamp member 64 is locked to the lower portion of one of the protrusions, and the clamp bolt 65 is tightened in a state where the tip portion 77 of the clamp member 64 is hooked on the hook portion 74 of the sieve member 61. Thereby, the upper end of the clamp member 64 is restrained, and the reaction force of the clamp member 64 is received by the reaction force receiving member 66D. 18 and 19 show a state in which the clamp member 64 is locked to the upper protrusion, but if the protrusion is changed to the lower protrusion, the pressing position of the clamp member 64 is changed (in this case, lowered). Can do. Other configurations are the same as those of the first embodiment.

  Also in this embodiment, since the pressing position of the clamp member 64 can be changed, the same effect as the first embodiment can be obtained. Further, since the reaction force receiving member 66D can be formed of a thin rod-like member, there is an effect of reducing the material. Moreover, since the operation | work which loosens or tightens the fixing bolt 67 is unnecessary, workability | operativity further improves compared with 1st Embodiment.

  In the above description, the case where the present invention is applied to a self-propelled vibrating screen that sorts an object to be sorted into three particle sizes has been described as an example. However, vibrations that sort into two particle sizes or four or more particle sizes are described. The present invention can also be applied to a screen, a stationary type or a towing traveling type vibrating screen, and the same effect can be obtained.

31 Device body 61, 61 'Sieve member 62 Sieve member 63 Bracket 64 Clamp member 65 Clamp bolt 66, 66A-66D Reaction force receiving member 66a Through hole 67 Fixing bolt 74 Hook part 81, 81A, 81B Pressing surface 82, 82A, 82B Holding surface 83 Notch C Center L1-6 Distance (length of perpendicular)
O center

Claims (6)

A frame-shaped device body;
A bracket projecting from the inner wall surface of the side wall of the device body;
An end portion is placed on the bracket, and a sieve member that forms a hook portion in which the end portion is folded upward;
A clamp member that engages with the hook portion of the sieve member;
Clamp this clamp member toward the side wall of the apparatus main body, and pull the hook portion to apply tension to the sieve member,
A reaction force receiving member that restrains an upper portion of the clamp member;
A fixing bolt for fixing the reaction force receiving member to the apparatus main body,
The vibration screen according to claim 1, wherein the reaction force receiving member is configured such that a distance from a fixing position by the fixing bolt to a pressing position of the clamp member is variable.   The reaction force receiving member is a long member extending in the longitudinal direction of the apparatus main body, and the lengths of the perpendiculars from the center of the through hole of the fixing bolt to the two upper and lower long sides are different. The vibrating screen according to claim 1.   The said reaction force receiving member is a square-shaped member, The length of each perpendicular from the center of the through-hole of the said fixing bolt to a pair of upper and lower sides is different, respectively. Vibrating screen.   2. The vibrating screen according to claim 1, wherein the reaction force receiving member is a quadrangular member, and the lengths of the vertical lines from the center of the through hole of the fixing bolt to the four sides are different from each other.   5. The vibrating screen according to claim 3, wherein the reaction force receiving member has a notch for identifying a mounting posture with respect to the apparatus main body. A frame-shaped device body;
A bracket projecting from the inner wall surface of the side wall of the device body;
An end portion is placed on the bracket, and a sieve member that forms a hook portion in which the end portion is folded upward;
A clamp member that engages with the hook portion of the sieve member;
Clamp this clamp member toward the side wall of the apparatus main body, and pull the hook portion to apply tension to the sieve member,
A reaction force receiving member that restrains the upper part of the clamp member;
The vibration screen is characterized in that the reaction force receiving member is provided on an inner wall surface of the apparatus main body, and is a plurality of grooves or protrusions provided in the vertical direction for locking the upper part of the reaction force receiving member.

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