Vibrating screen

Abstract

To provide a vibrational sieving machine capable of reducing the number of man-hours for mounting a screen.SOLUTION: A vibrational sieving machine 1 comprises a side wall part 10, a net-like net part 20, a support part 40 that is provided on the side wall part 10 so as to support the net part 20, and a pressing part 30 that is mounted on the side wall part 10 so as to press the net part against the support part 40. The pressing part 30 includes a body part 31 that is placed on the net part 20, and a bolt part 32 for fixing the body part 31 to the side wall part 10. The bolt part 32 is fixed at an angle of 10-80° with respect to a height direction DR1 of the side wall part 10.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a vibrating sieve machine.

Background Art

[0002] When sieving lumps and powdery or granular materials such as ores, crushed stones, cokes, stones, and gravels conveyed by a belt conveyor or the like, a vibrating sieve machine is used. The above-mentioned lumps and powdery or granular materials are sieved by a net part (screen) provided in the vibrating sieve machine, but since the screen wears out, it is necessary to replace it regularly.

[0003] If the screen is not properly fixed, the deterioration of the screen will be accelerated. Therefore, in the screen replacement work (installation work), it is necessary to appropriately press and fix the replaced screen with a clamping bar.

[0004] In a conventional vibrating sieve machine, a technique for fixing a screen is disclosed in, for example, Japanese Patent Application Laid-Open No. 2021-20212 (Patent Document 1).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In the conventional vibrating screen machine described in Patent Document 1, the bolts are driven into the clamping bar from an almost horizontal direction, resulting in a structure that makes it difficult for the clamping bar to exert force in the direction that presses down on the screen (vertically downward). In such a vibrating screen machine, when attaching the screen, the bolts are first loosely tightened to temporarily fix the clamping bar, then the top of the clamping bar is hammered to make it tightly adhere to the screen, and then the bolts are fully tightened to fix the screen with the clamping bar.

[0007] As described above, the need for pre-tightening bolts and hammering the top of the clamping bar meant that the installation process for the screen was time-consuming, which was a problem. Furthermore, when the screen had a two-tiered structure, the installation work had to be done in a confined space, making it particularly strenuous.

[0008] The objective of the present invention is to provide a vibrating screen machine that can reduce the number of steps required to install the screen. [Means for solving the problem]

[0009] According to one aspect of the present invention, Side wall section, A mesh-like net section, A support portion provided on the side wall portion for supporting the mesh portion, It comprises a pressing portion attached to the side wall portion and pressing the mesh portion against the support portion, The pressing portion includes a main body portion that rests on the mesh portion and a bolt portion that fixes the main body portion to the side wall portion. A vibrating screen is provided, wherein the bolt portion is fixed at an angle of 10° to 80° with respect to the height direction of the side wall portion. [Effects of the Invention]

[0010] According to one aspect of the present invention, a vibrating screen machine that can reduce the number of steps required to install the screen can be realized. [Brief explanation of the drawing]

[0011] [Figure 1] This is a perspective view of the vibrating screen machine according to the first embodiment. [Figure 2] This is a magnified view of section A in Figure 1. [Figure 3] Figure 2 shows a cross-sectional view of the B-B plane. [Figure 4] This is a perspective view of the side wall section as seen from the outside in the width direction. [Figure 5] This is a perspective view of the bearing section. [Figure 6] This is a cross-sectional view of the pressing portion of the second embodiment. [Modes for carrying out the invention]

[0012] Embodiments of the present invention will be described below with reference to the drawings. In all drawings, similar components are denoted by the same reference numerals, and their descriptions are omitted as appropriate.

[0013] [First Embodiment] Figure 1 is a perspective view of the vibrating screen machine 1 according to the first embodiment. Figure 2 is an enlarged view of portion A in Figure 1. Figure 3 is a cross-sectional view of the B-B plane shown in Figure 2. The vibrating screen machine 1 will be described using Figures 1, 2, and 3. DR1 in Figures 1, 2, and 3 is the height direction of the vibrating screen machine 1. DR2 in Figures 1 and 2 is the longitudinal direction of the vibrating screen machine 1. DR3 in Figures 1 and 3 is the width direction of the vibrating screen machine 1.

[0014] The vibrating screen machine 1 comprises a side wall section 10, a mesh-like screen section 20, a support section 40, a pressing section 30, and a protective section 50. The vibrating screen machine 1 has the function of sieving lumpy or powdery materials such as ore, crushed stone, coke, stone, and gravel that are transported by a belt conveyor or the like using the screen section 20.

[0015] Side walls 10 are provided at both ends of the mesh part 20 in the width direction DR3. The side walls 10 have a plate-like shape. The side walls 10 extend in the longitudinal direction DR2. DR1 in FIGS. 1, 2, and 3 is also the height direction of the side walls 10.

[0016] The mesh part 20 is composed of two stages in the height direction DR1. The mesh of the lower-stage mesh part 20 is finer than that of the upper-stage mesh part 20. The mesh part 20 is composed of a metal material. Note that the mesh part 20 may be composed of an elastic member such as rubber. Since the mesh part 20 may wear out and break after being used for a certain period, it needs to be replaced regularly. The mesh part 20 extends in a plane perpendicular to the height direction DR1. The mesh part 20 extends in the longitudinal direction DR2. The mesh part 20 is provided inside the side walls 10. However, the mesh part 20 may be one stage or three or more stages.

[0017] As shown in FIGS. 2 and 3, the mesh part 20 is placed on the support part 40. The support part 40 is provided on the side walls 10. The support part 40 supports the mesh part 20. The support part 40 has a plate-like shape. The support part 40 has an L-shaped shape. The support part 40 is in close contact with the mesh part 20. The mesh part 20 is provided between the support part 40 and the pressing part 30. The mesh part 20 is pressed by the pressing part 30. The mesh part 20 is in close contact with the pressing part 30 and the support part 40.

[0018] (Pressing part 30) The pressing part 30 is attached to the side walls 10. The pressing part 30 presses the mesh part 20 toward the support part 40. The pressing part 30 holds down the mesh part 20. The pressing part 30 includes a main body part 31 (clamping bar). The main body part 31 has a plate-like shape. The main body part 31 extends in the longitudinal direction DR2. The main body part 31 is placed on the mesh part 20. The main body part 31 is attached to the side walls 10. The main body part 31 extends along the side walls 10. The main body part 31 is in contact with the mesh part 20.

[0019] The main body portion 31 has a curved portion 311. The curved portion 311 curves toward the side wall portion 10. In the cross-sectional view of Figure 3, the curved portion 311 extends away from the side wall portion 10 and then bends in a V-shape toward the side wall portion 10. The curved portion 311 is located below the main body portion 31. The curved portion 311 is in contact with the mesh portion 20. The curved portion 311 is pressing down on the mesh portion 20.

[0020] The mesh portion 20 includes a hook portion 21. The hook portion 21 has a curved shape. The hook portion 21 is provided at the end of the mesh portion 20 in the width direction DR3. The outside of the hook portion 21 is covered with a metal plate. The hook portion 21 is provided to engage with the curved portion 311. The hook portion 21 is in contact with the curved portion 311.

[0021] The main body portion 31 further has a plate-like portion 312. The plate-like portion 312 extends in the longitudinal direction DR2. The plate-like portion 312 is provided at an oblique angle (β in Figure 3) with respect to the height direction DR1 of the side wall portion 10. The direction of inclination of the plate-like portion 312 is such that it moves away from the side wall portion 10 from top to bottom. The plate-like portion 312 is provided at an angle (β in Figure 3) of 10° to 80° with respect to the height direction DR1 of the side wall portion 10. It is more preferable if the angle of the plate-like portion 312 (main body portion 31) is between 30° and 60°.

[0022] The main body portion 31 further has an upper end portion 313. The upper end portion 313 is provided on the upper side of the main body portion 31. The upper end portion 313 has a curved shape. The upper end portion 313 is in contact with the protective portion 50.

[0023] The protective part 50 has a plate-like shape. The protective part 50 is provided between the side wall portion 10 and the main body portion 31 (upper end portion 313). In the width direction DR3, the protective part 50 is positioned on the inside of the side wall portion 10 (the side on which the mesh portion 20 is provided). Bolt holes 51 are formed in the protective part 50. The protective part 50 is fixed to the side wall portion 10 by bolts 52 that pass through the bolt holes 51 and a second through hole 15 formed in the side wall portion 10, and nuts 53.

[0024] The pressing portion 30 further includes a bolt portion 32. The bolt portion 32 fixes the main body portion 31 to the side wall portion 10. The bolt portion 32 has a bolt 321 and a nut 322. The bolt 321 passes through a first through hole 14 formed in the side wall portion 10. The main body portion 31 is fixed to the side wall portion 10 using the bolt 321 and the nut 322. The bolt 321 passes through a bolt hole 315 formed in the plate-like portion 312 (main body portion 31). The bolt hole 315 has a square hole shape. The bolt 321 is driven in almost perpendicularly to the plate-like portion 312.

[0025] The bolt 321 has a head 321a and a shaft 321b. The shaft 321b extends in the axial direction DR4 of the bolt 321. The shaft 321b has a rectangular prism shape. The head 321a has a spherical shape. The head 321a is located above the shaft 321b in the axial direction DR4. When the nut 322 is tightened, the rectangular prism-shaped shaft 321b engages with the rectangular bolt hole 315, preventing the shaft 321b (bolt 321) from rotating. In this way, the bolt 32 (bolt 321) is configured not to rotate when the nut 322 is tightened.

[0026] The bolt 321 (bolt portion 32) is fixed at an angle (α in Figure 3) to the height direction DR1 of the side wall portion 10. The bolt 321 (bolt portion 32) is fixed at an angle (α in Figure 3) of 10° to 80° with respect to the height direction DR1 of the side wall portion 10. Preferably, the angle of the bolt 321 (bolt portion 32) is between 30° and 60°. The angle between the axial direction DR4 of the bolt 321 and the height direction DR1 is between 10° and 80°. Preferably, the angle is between 30° and 60°. The bolt 321 is in contact with the plate-like portion 312. The bolt 321 passes through the bolt hole 315 formed in the plate-like portion 312 (main body portion 31). The bolt 321 is driven in almost perpendicularly to the plate-like portion 312.

[0027] Figure 4 is a perspective view of the side wall portion 10 from the outside in the width direction DR3. Figure 5 is a perspective view of the bearing portion 33. The bearing portion 33 will be explained using Figures 3 to 5. The pressing portion 30 further includes the bearing portion 33.

[0028] The bearing portion 33 is located on the side opposite the main body portion 31 relative to the side wall portion 10. The bearing portion 33 is located on the outside of the side wall portion 10 in the width direction DR3. The bolt 321 passes through the bearing hole 334 formed in the bearing portion 33. The inner diameter of the bearing hole 334 is larger than the outer diameter of the bolt 321.

[0029] The bearing portion 33 has a flat portion 331, a projection portion 332, and a cylindrical portion 333. The flat portion 331 has a plate-like shape. The flat portion 331 has an elliptical shape. A bearing hole 334 is formed in the flat portion 331.

[0030] The cylindrical portion 333 has a cylindrical shape. The cylindrical portion 333 protrudes from the flat portion 331 toward the outside of the side wall portion 10. The cylindrical portion 333 protrudes in the opposite direction to the projection portion 332. The cylindrical portion 333 protrudes obliquely with respect to the height direction DR1. The cylindrical portion 333 protrudes in a direction inclined by 10° to 80° with respect to the height direction DR1.

[0031] The projection 332 protrudes from the flat portion 331 toward the inside of the side wall portion 10. The projection 332 has a semi-elliptical shape. When attaching the bearing portion 33 to the side wall portion 10, the projection 332 is fitted into the hole portion 13 formed in the side wall portion 10. The outer diameter of the projection 332 is smaller than the inner diameter of the hole portion 13. The projection 332 is located above the first through hole 14 in the height direction DR1. The hole portion 13 is formed above the first through hole 14.

[0032] The projection 332 has an upper surface portion 332a and a lower surface portion 332b. The upper surface portion 332a has a semi-elliptical shape. The upper surface portion 332a faces the upper side of the inner surface of the hole 13 in the height direction DR1. The lower surface portion 332b faces the lower side of the inner surface of the hole 13 in the height direction DR1.

[0033] (Effects and Benefits) The effects and advantages of the present invention will be explained below using Figure 3. A feature of the present invention is that the bolt 321 is fixed at an angle of 10° to 80° with respect to the height direction DR1 of the side wall portion 10. When the bolt 321 is fixed at the above angle, a component force F1 (a force acting vertically downward) is generated from the axial force F of the bolt 321. Due to the action of the component force F1, which is a force acting vertically downward, the mesh portion 20 is pressed downward through the main body portion 31 (curved portion 311). As a result, the main body portion 31 (clamping bar) can effectively press the mesh portion 20. By effectively pressing the mesh portion 20, the mesh portion 20 (screen) becomes less likely to come off due to vibration.

[0034] In conventional technology, the bolts were fixed to the side wall almost horizontally, so the vertical downward component of the axial force of the bolts was very small. Therefore, when installing the mesh (screen), the bolts were first loosely tightened to fix the main body (clamping bar), then the top of the main body was hammered to make it tightly adhere to the mesh (positioning the main body to effectively press against the mesh), and only then were the bolts tightened to fix the mesh.

[0035] In this invention, a force acts in a direction that presses down on the mesh portion 20 (component force F1), allowing the main body portion 31 to effectively press down on the mesh portion 20. This eliminates the need for the conventional steps of temporarily tightening bolts and hammering the upper part of the main body portion (clamping bar) to make the main body portion tightly adhere to the mesh portion. In other words, the installation (replacement) time for the mesh portion 20 can be reduced. As a result, the installation (replacement) time for the mesh portion 20 is shortened, and the workload of the operator is reduced. This makes it possible to realize a vibrating screen machine 1 that can reduce the installation time for the mesh portion 20 (screen).

[0036] The main body 31 has a plate-shaped portion 312 that is provided at an angle of 10° to 80° with respect to the height direction DR1 of the side wall portion 10. This allows the bolt 321 to be attached at an angle (between 10° and 80°) without the need for other parts such as jigs. As a result, the number of parts can be reduced, and cost increases can be suppressed.

[0037] The main body portion 31 has a curved portion 311 that contacts the mesh portion 20 and curves toward the side wall portion 10. This increases the surface area that presses against the mesh portion 20, making it easier for the main body portion 31 to press the mesh portion 20 against the support portion 40. Furthermore, since the surface pressure applied to the mesh portion 20 can be reduced, wear of the mesh portion 20 can be suppressed.

[0038] The mesh portion 20 includes a hook portion 21 that curves to engage with the curved portion 311. As a result, even if the mesh portion 20 (hook portion 21) attempts to move inward towards the side wall portion 10 in the width direction DR3 due to vibration, the hook portion 21 at the end of the mesh portion 20 engages with the curved portion 311, preventing the mesh portion 20 (hook portion 21) from moving inward towards the side wall portion 10 in the width direction DR3. Therefore, it is possible to prevent the mesh portion 20 from detaching from the main body portion 31.

[0039] The bearing portion 33 has a projection 332 that fits into a hole 13 formed in the side wall portion 10. The projection 332 has a positioning function for the bearing portion 33 relative to the side wall portion 10. As a result, when a force in the direction of the component force F1 acts on the bearing portion 33, the lower surface portion 332b of the projection 332 engages with the lower side of the inner surface of the hole 13. Therefore, it is possible to suppress displacement of the fixed position of the bearing portion 33. Consequently, the bolt 321 can be stably fixed to the side wall portion 10.

[0040] The projection 332 is positioned above the first through-hole 14 in the height direction DR1. This allows the bolt 321 to be more stably fixed to the side wall 10.

[0041] The angle α of the bolt portion 32 (bolt 321) is between 30° and 60°. This allows the main body portion 31 to more effectively press the mesh portion 20 toward the support portion 40.

[0042] A plate-shaped protective portion 50 is provided between the side wall portion 10 and the main body portion 31. This suppresses wear of the main body portion 31 (upper end portion 313) due to contact between the main body portion 31 (upper end portion 313) and the side wall portion 10.

[0043] [Second Embodiment] Figure 6 is a cross-sectional view of the pressing section 30 of the second embodiment. In the second embodiment, the vibrating screen machine 1 further comprises a jig section 60. A jig hole 61 is formed in the jig section 60. The bolt 321 passes through the jig hole 61. In the second embodiment, the main body section 31 further comprises a vertical section 314. The vertical section 314 extends in the height direction DR1. The vertical section 314 is provided substantially parallel to the side wall section 10.

[0044] The jig portion 60 is provided between the head portion 321a and the vertical portion 314. The jig portion 60 includes a front portion 62 and a back portion 63. The front portion 62 is the surface facing inward to the side wall portion 10. The front portion 62 is in contact with the head portion 321a. The back portion 63 is in contact with the vertical portion 314.

[0045] The surface portion 62 is provided at an angle to the side wall portion 10 (height direction DR1). In the cross-sectional view of Figure 6, the angle γ between the direction in which the surface portion 62 extends and the height direction DR1 is preferably between 10° and 80°. Although not shown, the jig portion 60 is fixed to the vertical portion 314 by one of the following methods: by having a projection, by welding or screws, or by a configuration that utilizes frictional force. Although not shown, the bearing portion 33 is also fixed to the side wall portion 10 by one of the following methods: by having a projection (a configuration similar to the projection 332 of the first embodiment is also acceptable), by welding or screws, or by a configuration that utilizes frictional force.

[0046] Even without driving the bolt 321 into the plate-shaped portion 312 which is provided at an angle to the side wall portion 10, the effects of the present invention can be achieved if the bolt 321 is provided at an angle to the side wall portion 10, as in the configuration of the second embodiment described above. The configuration of the second embodiment can be achieved by adding the jig portion 60 to the conventional mechanism (a mechanism that drives bolts into a vertical portion in a nearly horizontal direction) (the configuration of the second embodiment can be realized by retrofitting the conventional mechanism), thus suppressing an increase in the manufacturing cost of the vibrating screen machine.

[0047] The embodiments of the present invention have been described above with reference to the drawings, but these are merely examples of the present invention, and various other configurations can be adopted. The configuration of the pressing portion 30 described in the embodiments is adopted on both sides of the mesh portion 20, but it may also be adopted on only one side of the mesh portion 20. Examples of reference formats are provided below. 1. Side wall section, A mesh-like net section, A support portion provided on the side wall portion for supporting the mesh portion, It comprises a pressing portion attached to the side wall portion and pressing the mesh portion against the support portion, The pressing portion includes a main body portion that rests on the mesh portion and a bolt portion that fixes the main body portion to the side wall portion. The bolt portion is fixed at an angle of 10° to 80° with respect to the height direction of the side wall portion, in a vibrating screen machine. 2. The vibrating screen machine according to 1., wherein the main body has a plate-shaped portion provided at an angle of 10° to 80° with respect to the height direction of the side wall. 3. The vibrating screen machine according to 1. or 2., wherein the main body portion has a curved portion that contacts the mesh portion and curves toward the side wall portion. 4. The vibrating screen machine according to 3., wherein the mesh portion includes a hook portion that curves to engage with the curved portion. 5. The pressing portion further includes a bearing portion provided on the side opposite to the main body portion relative to the side wall portion, The bolt portion penetrates the bearing portion, The vibrating screen machine according to any one of 1 to 4, wherein the bearing portion has a projection that fits into a hole formed in the side wall portion. 6. A first through-hole is formed in the side wall portion through which the bolt portion passes. The vibrating screen machine according to 5., wherein the projection is provided above the first through hole in the height direction. 7. The vibrating screen machine according to any one of 1 to 6, wherein the angle of the bolt portion is 30° or more and 60° or less. 8. The vibrating screen machine according to any one of 1 to 7, further comprising a plate-shaped protective portion provided between the side wall portion and the main body portion. [Explanation of Symbols]

[0048] 1 Vibrating screen machine, 10 Side wall section, 13 Hole section, 14 Through hole, 20 Mesh section, 21 Hook section, 30 Pressing section, 31 Main body section, 32 Bolt section, 33 Bearing section, 40 Support section, 50 Protective section, 51 Bolt hole, 52 Bolt, 53 Nut, 60 Jig section, 61 Jig hole, 62 Surface section, 63 Back section, 311 Curved section, 312 Plate-shaped section, 312c Vertical section, 313 Upper end section, 314 Vertical section, 321 Bolt, 321a Head, 321b Shaft section, 322 Nut, 331 Flat section, 332 Protrusion, 332a Top surface section, 332b Bottom surface section, 333 Cylindrical section, 334 Bearing hole, DR1 Height direction, DR2 Longitudinal direction, DR3 Width direction, DR4 axis direction

Claims

1. Side wall section, A mesh-like net section, A support portion provided on the side wall portion for supporting the mesh portion, A pressing portion is attached to the side wall portion and presses the mesh portion against the support portion, It comprises a jig section provided with a jig hole, The pressing portion includes a main body portion that rests on the mesh portion and a bolt portion that fixes the main body portion to the side wall portion. The main body portion has a vertical portion that extends in the height direction of the side wall portion, The aforementioned bolt portion has a bolt, The angle between the axial direction of the bolt and the height direction of the side wall is 10° or more and 80° or less. The jig portion is provided between the head of the bolt and the vertical portion. The bolt passes through the jig hole, The surface of the jig portion that is in contact with the head portion is oblique to the height direction of the side wall portion. Vibrating screen machine.

2. The vibrating screen machine according to claim 1, wherein the main body portion has a curved portion that contacts the mesh portion and curves toward the side wall portion.

3. The vibrating screen according to claim 2, wherein the mesh portion includes a hook portion that curves to engage with the curved portion.

4. The pressing portion further includes a bearing portion provided on the side opposite to the main body portion relative to the side wall portion, The bolt portion penetrates the bearing portion, The vibrating screen according to any one of claims 1 to 3, wherein the bearing portion has a projection that fits into a hole formed in the side wall portion.

5. A first through-hole is formed in the side wall portion through which the bolt portion passes. The vibrating screen machine according to claim 4, wherein the projection is provided above the first through hole in the height direction.

6. The vibrating screen machine according to any one of claims 1 to 5, wherein the angle between the axial direction of the bolt and the height direction of the side wall is 30° or more and 60° or less.

7. The vibrating screen according to any one of claims 1 to 6, further comprising a plate-shaped protective portion provided between the side wall portion and the main body portion.

8. The vibrating screen machine according to any one of claims 1 to 7, wherein the angle between the surface of the jig portion and the height direction of the side wall portion is 10° or more and 80° or less.

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