Drum-type filtration device

Abstract

To provide a drum-type filtration device capable of shortening the time required for replacing a belt-shaped filter cloth compared to conventional devices and improving work efficiency. [Solution] The drum-type filtration device (1) is disposed above the drum (36) and comprises an upper winding section (24) that unwinds and sends out wound strip-shaped filter cloth (18) to a filter feeding device (41) and winds up the strip-shaped filter cloth, and an attachment (62) that is detachably attached to an unused roll shaft (61) around which unused strip-shaped filter cloth is wound, and that enables the unused roll shaft to be attached to the upper winding section, the attachment having a first mounting member (63) and a second mounting member (65) that are detachably attached to both ends of the unused roll shaft, respectively, and the unused roll shaft is detachably and rotatably attached to the first side wall (11B) and the second side wall (11A) via the first mounting member and the second mounting member.

Description

[Technical Field]

[0001] The present disclosure relates to a drum-type filtration device. [Background technology]

[0002] Various drum-type filtration devices have been proposed. In the filter cloth reciprocating filtration device described in Patent Document 1, the filter cloth wound around one shaft is unwound, passes through a guide roll, a suction box, and a sprinkler pipe, and is fed as the drum rotates while adhering to the surface of the drum via the guide roll. The filter cloth then passes through a guide roll, a suction box, and a sprinkler pipe, passes through the guide roll, and is wound up around the other shaft. When the filter cloth has been completely unwound from one shaft, the drive units are reversed, the filter cloth is transported in the opposite direction, and the filter cloth wound around the other shaft is unwound and wound up around one shaft. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Registered Utility Model No. 3026488 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when replacing the filter cloth of the drum-type filtration device described in Patent Document 1, it is generally necessary to rewind the replacement filter cloth onto the shaft attached to the device, which is a time-consuming task.

[0005] An object of one aspect of the present disclosure is to provide a drum-type filtration device that can shorten the time required to replace a belt-shaped filter cloth compared to conventional devices and improve work efficiency. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, a drum-type filtration device according to one embodiment of the present disclosure includes a case having a front wall, a rear wall, and a first side wall and a second side wall connecting the front wall and the rear wall; a drum rotatably supported by a drum support shaft having both ends attached to the first side wall and the second side wall; a filter feeding device having an endless annular mesh belt disposed below the drum along the outer periphery of the drum; a longitudinal belt-shaped filter cloth sandwiched between the mesh belt and the drum and fed by the filter feeding device; and a wound filter cloth disposed above the drum. The filter apparatus comprises an upper winding section that unwinds the strip filter cloth to the filter feeding device and winds up the strip filter cloth, and an attachment that is removably attached to an unused roll shaft around which unused strip filter cloth is wound, and that enables the unused roll shaft to be attached to the upper winding section, wherein the attachment has a first mounting member and a second mounting member that are removably attached to both ends of the unused roll shaft, and the unused roll shaft is removably and rotatably attached to the first side wall and the second side wall via the first mounting member and the second mounting member. [Effects of the Invention]

[0007] According to one aspect of the present disclosure, the time required for replacing the belt-shaped filter cloth can be shortened compared to conventional methods, thereby improving work efficiency. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic cross-sectional view illustrating the configuration of a drum-type filtration device according to an embodiment of the present invention. FIG. [Figure 2] 2 is a cross-sectional view taken along the X1-X1 arrows in FIG. 1. [Figure 3] 10 is a perspective view of the second side wall side of the upper winding section as seen from inside the case. FIG. [Figure 4] 10 is a perspective view of the second side wall side of the upper winding section as seen from outside the case. FIG. [Figure 5] FIG. 4 is a vertical cross-sectional view of the first mounting member. [Figure 6]FIG. 6 is a front view of the first mounting member as seen from the right side of FIG. 5. [Figure 7] FIG. 4 is a vertical cross-sectional view of the second mounting member. [Figure 8] 8 is a front view of the second mounting member as seen from the right side of FIG. 7. FIG. [Figure 9] FIG. 10 is an explanatory diagram illustrating a method for attaching an unused roll shaft around which an unused strip-shaped filter cloth is wound. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Schematic configuration of drum-type filtration device] An embodiment of the present disclosure will be described in detail below with reference to FIGS. 1 to 9. A schematic configuration of a drum-type filtration device 1 according to this embodiment will be described with reference to FIG. 1. FIG. 1 is a side view of the drum-type filtration device 1 according to this embodiment (hereinafter also referred to as the "filtration device"), and is a schematic cross-sectional view taken along a vertical plane passing through the center of the width of the filtration device 1. The filtration device 1 is a device that filters, for example, grinding fluid or cutting fluid used in machining bearings or the like. As shown in FIG. 1, the filtration device 1 includes a substantially box-shaped case 11 and a clean tank 12 that stores purified coolant, i.e., clean fluid CF. The case 11 is disposed on the clean tank 12. The clean tank 12 is disposed on a horizontal floor surface 13.

[0010] The case 11 has a front wall 11C, a rear wall 11D, a first side wall 11B and a second side wall 11A (see FIG. 2) connecting the front wall 11C and the rear wall 11D, a top wall 11D that closes from above the opening of the space surrounded by the front wall 11C, the rear wall 11D, the first side wall 11B, and the second side wall 11A, and a bottom wall 11E. A communication hole (not shown) is formed in the bottom wall 11E to allow the purified clean liquid CF to fall into the clean tank 12. A notch 15 is formed in the end of the bottom wall 11E on the rear wall 11D side, and a sludge storage container 16 that opens upward and is disposed below the notch 15 for storing sludge SG.

[0011] A groove 22 is formed in the upper wall 11D of the case 11, in which a cylindrical first roll 21, around which one end of a strip filter cloth 18 of a predetermined width that functions as a strip filter, is wound, is rotatably disposed. The first roll 21 is rotatably supported by the first side wall 11B and the second side wall 11A. A filter cloth inlet 25 is formed penetrating the bottom of the groove 22 (between the front wall 11C and the lower end of the groove 22), through which the strip filter cloth 18 unwound from the first roll 21 and hung around the guide shaft 23 is introduced into the case 11. The strip filter cloth 18 is a strip filter made of a filter material such as a nonwoven fabric or a woven fabric, but is not limited thereto, and the material may be appropriately selected depending on the purpose of filtration.

[0012] The guide shaft 23 is disposed between the first side wall 11B and the second side wall 11A, horizontally relative to the floor surface 13, and both ends are attached by bolts or the like (see FIG. 4). A pair of guide members 19A, 19B are disposed between the first roll 21 and the guide shaft 23, attached to the first side wall 11B and the second side wall 11A, and press both side edges of the strip filter cloth 18 inward in the width direction perpendicular to the unwinding and winding directions of the strip filter cloth 18 (see FIG. 3). One of the guide members 19B is shown in FIG. 1. The pair of guide members 19A, 19B are disposed between the guide shaft 23 and the upper winding section 24 in the unwinding direction of the strip filter cloth 18. More specifically, the pair of guide members 19A, 19B are disposed between the guide shaft 23 and the first roll 21, and are disposed closer to the front wall 11C than the maximum outer circumferential surface of the first roll 21.

[0013] In the filtration device 1, a cylindrical drum support shaft 31 is hung horizontally between the first side wall 11B and the second side wall 11A to rotatably support a drum 36. The drum 36 is formed by a pair of circular members 32 rotatably supported by the drum support shaft 31 and connected to each other via a longitudinal connecting member 33 of a predetermined length so that they face each other at a fixed interval. The filtration device 1 further includes a filter feeding device 41 having an endless circular mesh belt 38 that runs along half the circumference of the lower outer periphery of the pair of circular members 32. The rotation center line CL of the drum 36 is also the center line of the cylindrical drum support shaft 31.

[0014] Above the sludge storage container 16, a cylindrical second roll 26, around which the other end of the strip filter cloth 18 is wound, is rotatably supported by the first side wall 11B and the second side wall 11A inside the rear wall 11D. The filter feeding device 41 includes a first torque motor TM1 that applies a constant torque to generate tension on the strip filter cloth 18 of the first roll 21 disposed above, and a second torque motor TM2 that applies a constant torque to generate tension on the strip filter cloth 18 of the second roll 26. The first torque motor TM1 and the second torque motor TM2 are attached to the first side wall 11B. As a result, the elongated strip filter cloth 18 is unwound from the first roll 21 while being applied with a constant tension, and then taken up onto the second roll 26 from the filter feeding device 41 via the sludge deliquor separation device 28, preventing slack.

[0015] The first torque motor TM1, which is disposed above the drum 36, constitutes an upper winding section 24 that unwinds the strip filter cloth 18 wound around the first roll 21 and feeds it to the filter feeding device 41, and winds up the strip filter cloth 18. The second torque motor TM2, which is disposed downstream of the filter feeding device 41 in the conveying direction of the strip filter cloth 18, constitutes a lower winding section 27 that winds up the strip filter cloth 18 fed from the filter feeding device 41, and unwinds the strip filter cloth 18.

[0016] The filter feeding device 41 is provided so as to surround the drum 36, and includes a drive roller 42 and three driven rollers 44A, 44B, and 44C around which an endless circular mesh belt 38 is wound, and an electric motor M that drives and rotates the drive roller 42. When the drive roller 42 is driven and rotated, the endless circular mesh belt 38 and the drum 36 are rotated. As a result, the strip-shaped filter cloth 18 unwound from the first roll 21 is sandwiched between the mesh belt 38 and the pair of circular members 32 in a semicircular shape, and is then fed from the filter feeding device 41 toward the second roll 26 via the sludge deliquor separation device 28. The mesh belt 38 is a mesh having numerous meshes and made of metal, synthetic fiber, carbon fiber, or composite material.

[0017] Of the three driven rollers 44A, 44B, and 44C, the driven roller 44C is disposed at a height equal to or higher than that of the drive roller 42. The pair of driven rollers 44A and 44B are positioned at a height such that the mesh belt 38 stretched between the pair of driven rollers 44A and 44B is positioned a predetermined distance below the drum 36, and are also disposed a predetermined distance apart in the horizontal direction. The strip-shaped filter cloth 18 sent from the filter feeding device 41 to the sludge deliquification separation device 28 is wound around the second roll 26.

[0018] The cylindrical drum support shaft 31 is configured so that contaminated fluid DF discharged from a polishing machine or grinding machine that uses coolant can flow into the interior of the drum support shaft 31 via piping connected from the outside of the filtration device 1. The contaminated fluid DF that has flowed into the interior of the drum support shaft 31 flows into the drum 36 from a discharge port (not shown) formed in the drum support shaft 31. As a result, the contaminated fluid DF remaining on the strip filter cloth 18 inside the drum 36 is passed downward through the strip filter cloth 18, and sludge SG is deposited on the outer peripheral surface of the strip filter cloth 18.

[0019] The filter feeding device 41 is provided on the drum support shaft 31 and includes a liquid level sensor 46 that detects the liquid level of the dirty liquid DF remaining on the strip-shaped filter cloth 18 inside the drum 36, and a motor control device 48 that controls the rotation of the drive roller 42. The motor control device 48 adjusts the rotation speed of the drive roller 42 driven by the electric motor M so that the liquid level detected by the liquid level sensor 46 becomes a preset liquid level height, thereby appropriately controlling the feed speed (forward speed) of the strip-shaped filter cloth 18.

[0020] When the amount of the filter cloth 18 fed forward toward the sludge deliquification separator 28 reaches a predetermined amount, the filter feed device 41 reciprocates, moving the filter cloth 18 backward a predetermined distance in the opposite direction, and then feeding the filter cloth 18 forward again. This allows the filter feed device 41 to use the filter cloth 18 multiple times to filter the coolant.

[0021] For example, when the filter feeding device 41 reaches a position where the number of remaining turns of the strip filter cloth 18 unwound from the first roll 21 becomes zero, the inflow of the dirty liquid DF from the drum support shaft 31 is stopped. Then, the filter feeding device 41 moves the strip filter cloth 18 backward to a position where the number of remaining turns of the strip filter cloth 18 on the second roll 26 becomes zero so that the portion of the strip filter cloth 18 from which sludge has been removed by the sludge deliquor separation device 28 is wound onto the first roll 21.

[0022] Next, with the inflow of dirty liquid DF from the drum support shaft 31 resumed, the filter feeding device 41 unwinds the portion of the strip filter cloth 18 wound around the first roll 21 from which sludge has been removed by the sludge drainage separation device 28. The filter feeding device 41 then advances the strip filter cloth 18 again so that it is wound around the second roll 26 via the sludge drainage separation device 28. The filter feeding device 41 then repeats this forward and backward movement of the strip filter cloth 18.

[0023] The sludge drainage separation device 28 includes a pair of nipping rollers 52 that continuously nip and press the sludge SG accumulated on the outer peripheral surface of the strip filter cloth 18 delivered from the filter feeding device 41. The sludge drainage separation device 28 also includes a pair of guide rollers 54, 56 positioned diagonally below the pair of nipping rollers 52 and spaced a predetermined distance apart in the vertical direction. The sludge drainage separation device 28 also includes a rotating brush 58 that separates the cake-like sludge SG that has been drained by the pair of nipping rollers 52 and that accumulates on the outer peripheral surface of the strip filter cloth 18, which is guided in contact with the lower outer peripheral surface of the lower guide roller 56. The clean liquid CF that is nipped between the pair of nipping rollers 52 from the sludge SG on the outer peripheral surface of the strip filter cloth 18 and falls through the strip filter cloth 18 is then guided into the clean tank 12 via a clean liquid guide plate 59.

[0024] In order to clamp the belt-shaped filter cloth 18 between the pair of clamping rollers 52, the pair of clamping rollers 52 is preferably configured so that at least one of the pair of clamping rollers 52 is made of an elastic material that is elastically deformable in the radial direction, such as synthetic rubber, or a roller biasing mechanism is provided that biases one bearing of the pair of clamping rollers 52 toward the other bearing.

[0025] [Schematic configuration of the upper winding section 24] Next, the schematic configuration of the upper winding section 24 will be described with reference to Figs. 2 to 8. Fig. 2 is a cross-sectional view taken along the line X1-X1 in Fig. 1, illustrating the attachment state of an unused first roll 21. Fig. 3 is a perspective view of the second side wall 11A side of the upper winding section 24 as seen from inside the case 11. Fig. 4 is a perspective view of the second side wall 11A side of the upper winding section 24 as seen from outside the case 11.

[0026] As shown in FIG. 2 , the first roll 21 is a purchased product in a state in which an unused strip-shaped filter cloth 18 is wound in a roll shape around a cylindrical unused roll shaft 61. The unused roll shaft 61 is attached to the upper winding section 24 via attachments 62 detachably attached to both ends. The attachments 62 have a first attachment member 63 detachably attached to one end of the unused roll shaft 61 and a second attachment member 65 detachably attached to the other end of the unused roll shaft 61. The first attachment member 63 and the second attachment member 65 are made of a metal such as structural steel. The cylindrical unused roll shaft 61 is made of a metal such as aluminum, or a synthetic resin.

[0027] The first mounting member 63 is attached by screws to a motor shaft 66 of the first torque motor TM1, which is inserted from the outside of the first side wall 11B to the inside of the case 11. The configuration of the first mounting member 63 will now be described with reference to Figures 5 and 6. Figure 5 is a vertical cross-sectional view of the first mounting member 63. Figure 6 is a front view of the first mounting member 63 as viewed from the right side of Figure 5.

[0028] 5 and 6, the first mounting member 63 has a substantially cylindrical main body 63A that is fitted onto one end of the unused roll shaft 61. A shaft hole 63E, into which the motor shaft 66 of the first torque motor TM1 is fitted, penetrates the main body 63A along the central axis. A key groove 63F with a rectangular cross section is formed on the inner peripheral surface of the shaft hole 63E over the entire axial length.

[0029] The first mounting member 63 also has a substantially disk-shaped receiving portion 63B attached by welding or the like to the end face of the main body portion 63A facing the first torque motor TM1 (the end face on the left side in FIG. 5). The receiving portion 63B is substantially disk-shaped and has a diameter larger than that of the main body portion 63A, has a through-hole in the center that is larger than the shaft hole 63E, and is attached concentrically to the end face of the main body portion 63A. The receiving portion 63B has an annular rib that protrudes a predetermined height from its outer periphery around the entire circumference toward the opposite side (right side in FIG. 5) from the first torque motor TM1.

[0030] Furthermore, the first mounting member 63 has a ring-shaped flange portion 63C attached by welding or the like to the tip of an annular rib that protrudes a predetermined height toward the opposite side (right side in FIG. 5 ) from the receiving portion 63B relative to the first torque motor TM1. The flange portion 63C extends a predetermined length radially outward from the outer periphery of the receiving portion 63B and also extends a predetermined length radially inward. A ring-shaped gap 63D, which is slightly larger than the thickness of the unused roll shaft 61 when viewed from the front, is formed between the inner circumferential surface of the flange portion 63C and the outer circumferential surface of the main body portion 63A. The outermost diameter of the flange portion 63C is set to be slightly larger than the maximum outer circumferential diameter of the first roll 21.

[0031] A screw hole 63G is formed in the approximate center between the end face of the main body 63A opposite the receiving portion 63B and the flange portion 63C, penetrating radially from the outer circumferential surface of the main body 63A to the key groove 63F.

[0032] Furthermore, a pair of engaged portions 63H, which are generally rectangular in front view and protrude radially inward, are formed on the inner peripheral surface of the flange portion 63C, facing each other in the diameter direction. A predetermined gap is formed between the radially inner tips of the pair of engaged portions 63H and the outer peripheral surface of the main body portion 63A. Note that a pair of engaging portions 61A, which are elongated grooves recessed in the axial direction with a circumferential width slightly larger than that of the engaged portions 63H, are formed on both ends of the cylindrical unused roll shaft 61, facing each other in the diameter direction (see FIG. 9).

[0033] In addition, a pair of engaging portions that protrude radially outward by a predetermined height may be provided on both ends of the cylindrical unused roll shaft 61, and a pair of engaged portions that are recessed radially inward on the inner peripheral surface of the flange portion 63C and can engage with the pair of engaging portions.

[0034] The motor shaft 66 of the first torque motor TM1 attached to the outside of the first side wall 11B is fitted into a shaft hole 63E formed in the main body 63A of the first attachment member 63. After the motor shaft 66 is fitted into the shaft hole 63E, a key (not shown) is inserted into the key groove 63F to fix the motor shaft 66 to the shaft hole 63E. Thereafter, the first attachment member 63 is attached to the motor shaft 66 by screwing, for example, a hexagon socket head set screw into the screw hole 63G of the main body 63A of the first attachment member 63.

[0035] Then, one end of the unused roll shaft 61 of the first roll 21 is inserted into the main body 63A of the first mounting member 63, and while the pair of engaged portions 63H of the first mounting member 63 are inserted into the pair of long groove-shaped engaging portions 61A, the first mounting member 63 is further pushed toward the main body 63A of the first mounting member 63. As a result, one end of the unused roll shaft 61 is inserted into the gap 63D and abuts against the inner surface of the receiving portion 63B, and the first mounting member 63 is removably attached to one end of the unused roll shaft 61. As a result, one end of the unused roll shaft 61 around which the unused strip-shaped filter cloth 18 is wound is removably and rotatably attached to the first side wall 11B via the first mounting member 63.

[0036] 2 to 4, the second side wall 11A has a substantially rectangular opening 71 formed in a position facing the motor shaft 66 of the first torque motor TM1. The opening 71 is formed to a size that allows the unused strip filter cloth 18 wound around the unused roll shaft 61 and the second mounting member 65 attached to the other end of the unused roll shaft 61 to be inserted therethrough.

[0037] A substantially rectangular plate-shaped closing member 72 that closes the opening 71 from the outside of the second side wall 11A is detachably attached to the second side wall 11A with bolts 73. The closing member 72 has a through hole 72A formed in a position facing the motor shaft 66 of the first torque motor TM1, through which a cylindrical shaft portion 65E protruding from the end face of the second mounting member 65 on the second side wall 11A side can be inserted. A rotation support portion 75 formed of, for example, a metal bearing is disposed outside the through hole 72A of the closing member 72 to rotatably support the shaft portion 65E of the second mounting member 65 that protrudes outward from the through hole 72A.

[0038] The configuration of the second mounting member 65 will now be described with reference to FIGS. 7 and 8. FIG. 7 is a vertical cross-sectional view of the second mounting member 65. FIG. 8 is a front view of the second mounting member 65 as viewed from the right side of FIG. 7. As shown in FIGS. 7 and 8, the second mounting member 65 has a substantially cylindrical main body 65A that is fitted into the other end of the unused roll shaft 61. The second mounting member 65 has a cylindrical shaft 65E that protrudes vertically outward from the center by a predetermined length on the end face of the main body 65A on the second side wall 11A side (the end face on the left side in FIG. 7). The shaft 65E is rotatably supported by the rotation support part 75 that is attached to the outer surface of the blocking member 72 as described above.

[0039] The second mounting member 65 also has a generally disk-shaped receiving portion 65B attached by welding or the like to the end face of the main body portion 65A on the shaft portion 65E side (the end face on the left side in FIG. 7). The receiving portion 65B is generally disk-shaped with a diameter larger than that of the main body portion 65A, has a circular through-hole formed in the center into which the shaft portion 65E is fitted, and is attached concentrically to the end face of the main body portion 65A. The receiving portion 65B has an annular rib that protrudes a predetermined height from the outer periphery around the entire circumference toward the opposite side (the right side in FIG. 7) from the shaft portion 65E.

[0040] Additionally, the second mounting member 65 has a ring-shaped flange portion 65C attached by welding or the like to the tip of an annular rib that protrudes a predetermined height toward the opposite side (right side in FIG. 7) from the shaft portion 65E of the receiving portion 65B. The flange portion 65C extends a predetermined length radially outward beyond the outer periphery of the receiving portion 65B, and also extends a predetermined length radially inward. A ring-shaped gap 65D, which is slightly larger than the thickness of the unused roll shaft 61 when viewed from the front, is formed between the inner circumferential surface of the flange portion 65C and the outer circumferential surface of the main body portion 65A. The outermost diameter of the flange portion 65C is set to be slightly larger than the maximum outer circumferential diameter of the first roll 21.

[0041] Furthermore, a pair of engaged portions 65H, which are generally rectangular in front view and protrude radially inward, are formed on the inner peripheral surface of the flange portion 65C, facing each other in the diameter direction. A predetermined gap is formed between the radially inner tips of the pair of engaged portions 65H and the outer peripheral surface of the main body portion 65A. Note that a pair of engaging portions protruding radially outward by a predetermined height may be provided on both ends of the cylindrical unused roll shaft 61, and a pair of engaged portions recessed radially inward on the inner peripheral surface of the flange portion 65C, which are engageable with the pair of engaging portions.

[0042] 2, the main body 65A of the second mounting member 65 is fitted onto the other end of the unused roll shaft 61 of the first roll 21, and the pair of engaged portions 65H of the second mounting member 65 can be inserted into a pair of long-groove-shaped engaging portions 61A formed on the other end of the unused roll shaft 61. After the pair of engaged portions 65H are inserted, the main body 65A is further pushed into the other end of the unused roll shaft 61. As a result, the other end of the unused roll shaft 61 is inserted into the gap 65D and abuts against the inner surface of the receiving portion 65B, and the second mounting member 65 is detachably attached to the other end of the unused roll shaft 61.

[0043] Then, the blocking member 72 is attached to the outer surface of the second side wall 11A, and the shaft portion 65E of the second mounting member 65 is inserted into the rotation support portion 75 attached to the outer surface of the blocking member 72. As a result, the other end side of the unused roll shaft 61 around which the unused strip-shaped filter cloth 18 is wound is detachably and rotatably attached to the second side wall 11A via the second mounting member 65.

[0044] [How to install the first roll 21] Next, an example of a method for mounting the first roll 21, in which unused strip-shaped filter cloth 18 is wound around an unused roll shaft 61, in the case 11 will be described with reference to Fig. 9. Fig. 9 is an explanatory diagram for explaining an example of a method for mounting an unused roll shaft 61 around which unused strip-shaped filter cloth 18 is wound.

[0045] 9, first, the main body 65A of the second mounting member 65 is fitted onto the other end of the unused roll shaft 61 around which the unused strip-shaped filter cloth 18 is wound, and the pair of engaged portions 65H of the second mounting member 65 is engaged with the pair of engaging portions 61A on the other end of the unused roll shaft 61. In addition, the rotation support portion 75 is attached to the outside of the through hole 72A of the blocking member 72 by bolting or the like.

[0046] Thereafter, the first roll 21, in which the unused strip-shaped filter cloth 18 is wound around the unused roll shaft 61, and the second mounting member 65 attached to the other end of the unused roll shaft 61 are inserted into the opening 71 in the second side wall 11A. Next, one end of the unused roll shaft 61 is fitted into the main body 63A of the first mounting member 63 attached to the motor shaft 66 of the first torque motor TM1. Then, the pair of engaged portions 63H of the first mounting member 63 are engaged with the pair of engaging portions 61A on one end of the unused roll shaft 61, and the unused roll shaft 61 with the second mounting member 65 attached to the other end is further pushed in and attached to the first mounting member 63.

[0047] Next, the shaft portion 65E of the second mounting member 65 attached to the other end of the unused roll shaft 61 is inserted into the rotation support portion 75 attached to the outer surface of the closing member 72. Then, the closing member 72 is attached to the outside of the opening 71 of the second side wall 11A with the bolts 73. This allows the first roll 21, in which the unused strip-shaped filter cloth 18 is wound around the unused roll shaft 61, to be installed inside the case 11.

[0048] As described above in detail, in the drum-type filtration device 1 according to this embodiment, when replacing the strip filter cloth 18, the unused roll shaft 61 around which the unused strip filter cloth 18 is wound can be detachably and rotatably attached to the case 11 via the first attachment member 63 and the second attachment member 65. As a result, when replacing the strip filter cloth 18, it is no longer necessary to wind the unused strip filter cloth 18 around a take-up shaft, and the time required to replace the strip filter cloth 18 can be shortened compared to conventional methods, thereby improving work efficiency.

[0049] Furthermore, a first mounting member 63 attached to one end of the unused roll shaft 61 is attached to a motor shaft 66 of the first torque motor TM1. A second mounting member 65 attached to the other end of the unused roll shaft 61 is rotatably supported via a rotation support part 75 attached to a blocking member 72 that blocks the opening 71 of the second side wall 11A. This allows the strip filter cloth 18 to be reliably unwound and wound via the first mounting member 63 attached to the motor shaft 66 of the first torque motor TM1.

[0050] The blocking member 72 is removed from the second side wall 11A, and the shaft 65E of the second mounting member 65 is pulled out from the rotation support portion 75. Then, the unused roll shaft 61 around which the used strip filter cloth 18 is wound and the second mounting member 65 are removed to the outside through the opening 71. Then, the other end of the unused roll shaft 61 around which a new, unused strip filter cloth 18 is wound is inserted into the gap 65D of the second mounting member 65, and the pair of engaging portions 61A of the unused roll shaft 61 is fitted into the pair of engaged portions 65H of the second mounting member 65 to be attached. Thereafter, with the shaft 65E of the second mounting member 65 inserted into the rotation support portion 75 attached to the outer surface of the blocking member 72, the first roll 21 around which the unused strip filter cloth 18 is wound and the second mounting member 65 are inserted into the opening 71 of the second side wall 11A.

[0051] Next, one end of the unused roll shaft 61 is inserted into the gap 63D of the first mounting member 63 attached to the motor shaft 66 of the first torque motor TM1, and the pair of engaging portions 61A of the unused roll shaft 61 is fitted into the pair of engaged portions 63H to mount it. Thereafter, the blocking member 72 is attached to the opening 71, and the shaft portion 65E of the second mounting member 65 is rotatably supported by the rotation support portion 75. This allows the unused roll shaft 61 around which the unused strip filter cloth 18 is wound to be quickly mounted in the case 11, further shortening the time required to replace the strip filter cloth 18 compared to conventional methods and improving work efficiency.

[0052] Furthermore, the rotation of the first torque motor TM1 can be reliably transmitted to the unused roll shaft 61 via the pair of engaged portions 63H of the first mounting member 63 and the pair of engaging portions 61A of the unused roll shaft 61. The rotation of the unused roll shaft 61 can then be reliably transmitted to the rotation support portion 75 via the pair of engaging portions 61A of the unused roll shaft 61 and the pair of engaged portions 65H of the second mounting member 65. This allows the unused roll shaft 61 to rotate smoothly, ensuring the unwinding and winding of the strip-shaped filter cloth 18.

[0053] [Variations] A modification of the above embodiment will be described. In the following description, for the sake of convenience, the same reference numerals will be used to designate components having the same functions as those described in the above embodiment, and the description thereof will not be repeated.

[0054] [Variation 1] For example, the first torque motor TM1 may be attached to the second side wall 11A, and the opening 71 may be formed in the first side wall 11B. The opening 71 may then be blocked by a blocking member 72 having a rotation support member 75 attached to the outer screen. As a result, similar to the above-described embodiment, when replacing the strip filter cloth 18, the unused roll shaft 61 around which the unused strip filter cloth 18 is wound can be detachably and rotatably attached to the drum-type filtration device 1 via the first mounting member 63 and the second mounting member 65. As a result, when replacing the strip filter cloth 18, it is no longer necessary to wind the unused strip filter cloth 18 around a winding shaft (not shown). This eliminates the need to wind the unused strip filter cloth 18 around a winding shaft (not shown), thereby shortening the time required to replace the strip filter cloth 18 compared to conventional methods and improving work efficiency.

[0055] [Variation 2] In the above-described embodiment, the closing member 72 is fixed with the bolts 73. However, the closing member 72 is not limited to being fixed with the bolts 73. For example, one of the sides of the closing member 72 may be fixed with a hinge, and the closing member 72 may be opened and closed around a fixed axis of the hinge as a rotation axis. In this case, after attaching the unused roll shaft 61, the closing member 72 is closed, and the side opposite to the side on which the hinge is provided is fixed with a bolt.

[0056] [summary] The drum-type filtration device of the first embodiment includes a case having a front wall, a rear wall, and a first side wall and a second side wall connecting the front wall and the rear wall; a drum rotatably supported by a drum support shaft having both ends attached to the first side wall and the second side wall; a filter feeding device having an endless annular mesh belt disposed below the drum along the outer periphery of the drum; a longitudinal belt-shaped filter cloth sandwiched between the mesh belt and the drum and fed by the filter feeding device; and a filter roller disposed above the drum to feed the wound belt-shaped filter cloth. The filter device is provided with an upper winding section that unwinds the filter cloth to the filter feeding device and winds up the strip filter cloth, and an attachment that is removably attached to an unused roll shaft around which unused strip filter cloth is wound, allowing the unused roll shaft to be attached to the upper winding section, wherein the attachment has a first mounting member and a second mounting member that are removably attached to both ends of the unused roll shaft, and the unused roll shaft is removably and rotatably attached to the first side wall and the second side wall via the first mounting member and the second mounting member.

[0057] A second aspect is a drum-type filtration device of the first aspect, wherein the upper winding section is attached to the first side wall and has a torque motor that unwinds and winds the strip filter cloth, the first mounting member attached to one end of the unused roll shaft is attached to the motor shaft of the torque motor, and the second mounting member attached to the other end of the unused roll shaft is rotatably attached to the second side wall.

[0058] A third aspect is the drum-type filtration device of the second aspect, wherein the second side wall has an opening at a position opposite the motor shaft of the torque motor through which the unused strip filter cloth wound around the unused roll shaft and the second mounting member attached to the other end of the unused roll shaft can be inserted, and a blocking member that is detachably attached to the outside of the second side wall to block the opening and has a rotation support portion that rotatably supports the second mounting member, and the second mounting member has a shaft portion that is inserted into the rotation support portion and rotatably supported.

[0059] A fourth aspect is a drum-type filtration device according to any one of the first to third aspects, wherein the unused roll shaft has engaging portions formed at both axial ends thereof, and the first mounting member and the second mounting member have engaged portions that engage with the engaging portions when attached to both ends of the unused roll shaft, respectively.

[0060] [Additional Notes] The present disclosure is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present disclosure. [Explanation of symbols]

[0061] 1: Drum type filtration device 11: Case 11A: 2nd side wall 11B: 1st side wall 11C: Front wall 11D: Back wall 18: Belt-shaped filter cloth 24: Upper winding section 31: Drum support shaft 36: Drums 38: Mesh belt 41: Filter feeder 61: Unused roll shaft 61A: Engagement part 62: Attachment 63: First mounting member 63H, 65H: Engaged part 65: Second mounting member 65E: Shaft 66: Motor shaft 71: Opening 72: Closure member 75: Rotation support part TM1: First torque motor

Claims

1. a case having a front wall, a rear wall, and a first side wall and a second side wall connecting the front wall and the rear wall; a drum in which a pair of circular members are rotatably supported by a cylindrical drum support shaft, both ends of which are attached to the first side wall and the second side wall, and are connected to each other via a connecting member of a predetermined length, and contaminated fluid that has flowed into the drum support shaft flows into the drum support shaft through a discharge port formed in the drum support shaft; a filter feeding device that has an endless circular mesh belt that is disposed below the drum and that runs along half of the outer periphery of the lower side of the pair of circular members, and that rotates the mesh belt and the drum; a longitudinal belt-shaped filter cloth that is sandwiched between the mesh belt and the drum in a semicircular shape and sent by the filter sending device to filter the contaminated liquid downward; an upper winding section disposed above the drum, which unwinds the wound filter cloth to the filter feeding device and winds up the filter cloth; a lower winding section disposed downstream of the filter feeding device in the conveying direction of the belt-shaped filter cloth, for winding up the belt-shaped filter cloth fed from the filter feeding device and unwinding the belt-shaped filter cloth; an attachment that is detachably attached to an unused roll shaft around which the unused belt-shaped filter cloth is wound, and that can attach the unused roll shaft to the upper winding section; Equipped with the attachment has a first mounting member and a second mounting member that are detachably attached to both ends of the unused roll shaft, the unused roll shaft is detachably and rotatably attached to the first side wall and the second side wall via the first attachment member and the second attachment member, Drum-type filtration device.

2. The upper winding section is a torque motor attached to the first side wall for unwinding and winding the belt-shaped filter cloth; the first mounting member attached to one end of the unused roll shaft is attached to the motor shaft of the torque motor; the second mounting member attached to the other end of the unused roll shaft is rotatably attached to the second side wall; The drum-type filtration device according to claim 1.

3. The second side wall is an opening at a position facing the motor shaft of the torque motor through which the unused belt-shaped filter cloth wound around the unused roll shaft and the second mounting member attached to the other end of the unused roll shaft can be inserted; a closing member that is detachably attached to close the opening from the outside of the second side wall and has a rotation support portion that rotatably supports the second mounting member; and The second mounting member has a shaft portion that is fitted into the rotation support portion and rotatably supported. The drum-type filtration device according to claim 2.

4. the unused roll shaft has engagement portions formed at both axial ends, the first mounting member and the second mounting member have engaged portions that engage with the engaging portions when the first mounting member and the second mounting member are attached to both ends of the unused roll shaft, respectively; The drum-type filtration device according to any one of claims 1 to 3.

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