JP2013086052A - Filter press dehydrator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter press dehydrator which can correctly detect and correct meandering of a filter cloth.SOLUTION: A meandering correction mechanism 30 includes: a pair of guide rollers 31, 32 of which the shaft centers are arranged in postures parallel to each other, one of which comes in contact with a surface of the filter cloth 7 and the other of which comes in contact with a rear surface of the filter cloth 7; guide mechanisms 33, 34 which support a pair of guide rollers 31, 32 so as to be deflectable in order to hold the filter cloth 7 along a running direction while keeping the parallel posture; a pair of sensors 35, 36 which are respectively arranged near left and right terminal parts of the filter cloth 7 and detect deflection amount of the filter cloth 7 in a width direction accompanying the running of the filter cloth; and a driving mechanism which deflects a pair of guide rollers 31, 32 by driving the guide mechanisms 33, 34 based on difference between respective deflection amount detected by a pair of sensors 35, 36.

Description

  The present invention includes a plurality of filter plates supported so as to be movable between a pressure contact state and a separation state, an endless filter cloth sandwiched between the filter plates in the pressure contact state to form a filtration chamber, and the separation member. A filter press comprising: a support mechanism that supports the filter cloth so as to be able to run while being separated from each filter plate in a state; and a meander correction mechanism that corrects the meandering of the filter cloth that is running while being supported by the support mechanism The present invention relates to a dehydrator.

  Conventionally, various sludge treatment processes such as dewatering sludge generated at water purification plants and sewage treatment plants and separating it into filtrate and cake, or solid-liquid separation processes required in the production process of carbon products, titanium products, etc. Filter press dehydrators are used in the field for solid-liquid separation.

  FIG. 5 shows a conventional filter cloth dewatering apparatus of the filter cloth traveling type disclosed in Patent Document 1. In addition, the code | symbol explaining each part of this filter press dehydration apparatus has nothing to do with the code | symbol explaining each part of the filter press dehydration apparatus by this invention.

  The filter cloth traveling filter press dewatering device includes a base 1 provided with a set of stand frames 2 spaced apart from each other, and a plurality of filter plates 3 are movably provided in parallel between the stand frames 2. Filter cloths 4 are interposed between the filter plates 3, and each filter plate 3 is opened and closed by a hydraulic cylinder 5 to squeeze a stock solution such as sludge that is press-fitted between the double filter cloths 4. It is comprised so that it may isolate | separate into a filtrate.

  Each filter cloth 4 interposed between the filter plates 3 is composed of a plurality of endless filter cloths 6 connected to each other, and the filter cloth drive for causing the filter cloths 6 to travel along the travel path of each filter cloth 6. Apparatus A, filter cloth tensioning apparatus B for moderately tensioning the filter cloth 6, filter cloth cleaning apparatus C for spraying cleaning water on the filter cloth 4 and cleaning, and two rolls 13 for correcting the meandering of the filter cloth 6. A filter cloth meandering correction device D is provided, and each filter cloth 6 is run and washed every cycle of the pressing process.

Japanese Utility Model Publication No. 61-5937

  The meandering correction device D as described above includes an actuator that detects one end of the filter cloth 6 in the traveling direction, moves the roll 13 according to the amount of meandering of the one end of the detected filter cloth 6, and the filter cloth 6. Was configured to correct the meandering.

  Since the filter cloth 6 is repeatedly held between the filter plates 3 with a very large pressure every time the pressing process is performed, elongation occurs over time. For example, as compared with a new filter cloth, the filter cloth in use has an elongation of about 5 to 10% in the full length direction and about 3 to 7% in the width direction, and the elongation is not uniform.

  Here, since the elongation in the full length direction can be absorbed by the filter cloth tension mechanism, there is no particular adverse effect on the running of the filter cloth, but there is a problem in the case where the elongation in the width direction is partially generated.

  Since the actuator of the conventional meandering correction device D is configured to detect one end portion of the filter cloth 6 in the traveling direction, even if the filter cloth 6 is not meandering, the partially generated widthwise elongation is filtered. Since the roll 13 is moved in order to correct it and to correct it, there is a problem that the filter cloth meanders.

  An object of the present invention is to provide a filter press dewatering device capable of correctly detecting and correcting meandering of a filter cloth.

  In order to achieve the above-mentioned object, the characteristic configuration of the filter press dewatering device according to the present invention is supported so as to be movable between the pressure contact state and the separation state as described in claim 1 of the claims. A plurality of filter plates, an endless filter cloth that is sandwiched between the filter plates in the pressed state and forms a filtration chamber, and a support that supports the filter cloth so as to be able to travel while being separated from the filter plates in the separated state. A filter press dewatering device comprising a mechanism and a meandering correction mechanism for correcting meandering of the filter cloth that travels while being supported by the support mechanism, wherein the meandering correction mechanism includes left and right end portions of the filter cloth. A pair of sensors that are arranged in the vicinity and detect displacement amounts in the width direction of the filter cloth as the vehicle travels, and driving that is driven based on the difference between the displacement amounts detected by the pair of sensors. And a mechanism.

  According to the above-described configuration, the filter cloth is driven so as to correct the meandering of the filter cloth based on the difference between the displacement amounts detected by the pair of sensors. Even if the filter cloth is not meandering, the stretch of the filter cloth is detected without misdetecting the partial elongation in the width direction as meandering of the filter cloth. Detects meanders and corrects them correctly regardless of the presence of

  According to the second characteristic configuration described in claim 2, in addition to the first characteristic configuration described above, the meandering correction mechanism is configured such that the shaft centers are arranged in parallel to each other, and one of the surfaces is the surface of the filter cloth. A pair of guide rollers in contact with the back surface of the filter cloth, and a guide mechanism that supports the pair of guide rollers in a deflectable manner so that the filter cloth follows the traveling direction while maintaining the parallel posture. And the drive mechanism is configured to drive the guide mechanism and deflect the pair of guide rollers based on the difference between the displacement amounts detected by the pair of sensors.

  According to the above-described configuration, the guide mechanism is driven to deflect the pair of guide rollers based on the difference between the respective displacement amounts detected by the pair of sensors. Due to the configuration that detects one end of the cloth in the traveling direction, the filter cloth is not meandering, even though the filter cloth is not meandering. Can now detect and correct meandering regardless of the presence of fabric stretch.

  The pair of guide rollers are configured such that the shaft centers are arranged in parallel to each other, one is in contact with the surface of the filter cloth, and the other is in contact with the back surface of the filter cloth. Since it is not pinched by applying, the meandering of the filter cloth can be corrected without applying an excessive force to the filter cloth.

  In the third feature configuration, as described in claim 3, in addition to the first or second feature configuration described above, the drive mechanism is a cylinder provided in the guide mechanism that deflects the pair of guide rollers. The fluid circuit is configured to control a fluid supply amount and a supply direction supplied to the mechanism, and the sensor includes a contact portion urged to contact an end portion of the filter cloth, and the contact portion. And an actuator that controls the pressurized fluid supply port to the fluid circuit based on the contact state with the filter cloth.

  According to the above configuration, the sensor is connected to the fluid circuit based on the contact portion biased to contact the end portion of the filter cloth and the contact state of the contact portion with the filter cloth. Cylinder mechanism provided in the guide mechanism for deflecting a pair of guide rollers without using an expensive part such as a motor or a control device for the drive mechanism. The fluid circuit for controlling the fluid supply amount and the supply direction to be supplied can be configured at low cost. The fluid is preferably air from the viewpoint of ease of maintenance.

  As described above, according to the present invention, it is possible to provide a filter press dewatering device capable of correctly detecting and correcting the meandering of the filter cloth.

Schematic of filter press dewatering device according to the present invention (A) is a schematic diagram of the meandering correction mechanism, (b) is a circuit diagram of the meandering correction mechanism. It is explanatory drawing of the meandering correction of a filter cloth, (a) is explanatory drawing when a filter cloth meanders to the left of the advancing direction, (b) is explanatory drawing when a filter cloth meanders to the right of the advancing direction Illustration for filter cloth with partial elongation Illustration of a conventional filter press dewatering device

  The filter press dewatering device according to the present invention will be described below.

  As shown in FIG. 1, the filter press dewatering device 1 is provided in a front frame 2, a rear frame 3, a pair of side frames 4 laid between the front frame 2 and the rear frame 3, and the front frame 2. The upper frame 14, the advance / retreat mechanism 5, the drive roller 6, the endless filter cloth 7, the cleaning mechanism 8, the tension mechanism 9, the support mechanism 10, the base 13, and the plurality of filter plates 20. The diaphragm 21 and the meandering correction mechanism 30 are provided.

  Each filter plate 20 is supported by a forward / backward mechanism 5 installed in the front frame 2 so as to be movable along the side frame 4 in either a pressure contact state or a separated state.

  The advance / retreat mechanism 5 is composed of a hydraulic cylinder 5c having a pressing member 5b at the tip of a rod 5a. When the rod 5a is moved forward by the hydraulic cylinder 5c, each filter plate 20 shifts to a pressed state pressed toward the rear frame 3 via the pressing member 5b, and when the rod 5a is retracted, each filter plate 20 is moved. Moves toward the front frame and shifts to a separated state separated by a distance defined by, for example, a link mechanism 12 formed on the connecting bracket.

  An endless filter cloth 7 is disposed between the filter plates 20. A driving roller 6 for running the filter cloth 7 is disposed on the upper portion of the front frame 2. The drive roller 6 is drivingly connected to a drive motor via a speed reduction mechanism, and the drive mechanism is constituted by the drive roller 6, the speed reduction mechanism, and the drive motor.

  Each filter plate 20 includes a support mechanism 10 that supports the filter cloth 7 so as to be able to travel while being separated from each filter plate 20 in a separated state of each filter plate 20.

  The support mechanism 10 includes a lower roller 10a and an upper roller 10b supported by brackets fixed to the filter plates 20, and the filter cloth 7 is stretched vertically between adjacent filter plates 20 by both rollers 10a and 10b. Is done.

  In the vicinity of the upper roller 10b, there is provided a guide roller 10c that guides the filter cloth 20 so that the filter cloth 7 does not come into contact with the filter plate 20 and a diaphragm 21 described later when the filter plate 20 is in the separated state.

Each filter plate 20 is provided with a diaphragm 21 on one surface along the arrangement direction. When the filter plate 20 shifts to the pressure contact state by the advance / retreat mechanism 5, a filter chamber is formed in a space partitioned by the diaphragm 21 and the back surface of the adjacent filter plate 20. At this time, the filter cloth 7 is sandwiched between adjacent filter plates 20 to form a filtration chamber in the filter chamber.

  A base 13 is provided between the filter plates 20, and a through hole formed through the base plate 13 in the thickness direction of the filter plate 20 is communicated with the base 13 in a pressure contact state. Then, the processing object is supplied to the through-hole from the supply port provided in the rear frame 3 in the pressure contact state, and the processing object is filled into each filtration chamber via the branch path formed in the base 13.

  In a pressure contact state of each filter plate 20, pressurized water is supplied from a pressurized water flow path provided below each filter plate 20, and a diaphragm 21 attached to the filter plate 20 is expanded to the filter chamber side to squeeze the object to be treated. A pressing process is performed.

  When the squeezing process is completed, the advance / retreat mechanism 5 is retracted, and each filter plate 20 is in a separated state. In this state, the driving roller 6 is driven to execute a traveling process for causing the filter cloth 7 to travel.

  When the cleaning of the filter cloth 7 is completed, the driving roller 6 stops. Thereafter, the advance / retreat mechanism 5 is advanced to form a filtration chamber again between the filter plates 20, and the above-described squeezing process is repeated.

  The filter cloth 7 fed out from the leftmost filter plate 20 is cleaned by the cleaning mechanism 8 provided in the rear frame 3, and the traveling position in the width direction is corrected by the meander correcting mechanism 30 installed in the upper frame 14. After being corrected to the transport posture, it is passed over the drive roller 6.

  The cleaning mechanism 8 is configured to spray the cleaning liquid on the front and back surfaces of the filter cloth 7 that is traveling in the traveling process, and to wash away the residue of the dehydrated cake attached to the filter cloth 7.

  The meandering correction mechanism 30 corrects the meandering of the filter cloth 7 that travels while being supported by the support mechanism 10 so that the filter cloth 7 is guided to the drive roller 6 at a normal travel position.

  The filter cloth 7 fed out by the drive roller 6 is adjusted to a predetermined tension by a tension mechanism 9 similarly installed in the front frame 2, and then the filter surface is opposed by the support mechanism 10 obtained in each filter plate 20. In this state, the filter cloth 7 is separated from each filter plate 20 and supported so as to be able to run, and after being drawn out from each filter plate 20, the filter cloth 7 is again guided to the cleaning mechanism 8.

  The tensioning mechanism 9 includes a plurality of fixed rollers fixed to the front frame 2 and a plurality of moving rollers that approach and separate from the fixed roller, and the moving roller approaches and separates from the fixed roller, A predetermined tension is applied to the filter cloth 7. The predetermined tension refers to a tension that allows the drive roller 6 and the filter cloth 7 to run stably without slipping.

  Since the drive roller 6 is installed on the downstream side of the cleaning mechanism 8 along the travel path of the filter cloth 7, the filter cloth 7 reaches the drive roller 6 after being cleaned by the cleaning mechanism 8. The dehydrated cake residue does not adhere to the surface. Therefore, it is possible to avoid the occurrence of an inconvenient situation such as large meandering of the filter cloth 7 and generation of wrinkles due to adhesion and deposition of the residue on the driving roller 6.

  As shown in FIGS. 2A and 2B, the meandering correction mechanism 30 has a pair of shaft centers arranged in parallel with each other, one in contact with the surface of the filter cloth 7 and the other in contact with the back surface of the filter cloth 7. Guide rollers 31, 32, guide mechanisms 33, 34 for supporting the guide rollers 31, 32 in a deflectable manner so that the filter cloth 7 follows the traveling direction while maintaining the parallel posture, and left and right of the filter cloth 7. Based on the difference between the pair of sensors 35, 36 that are arranged near the ends and detect the amount of displacement of the filter cloth 7 in the width direction as the vehicle travels, and the amount of displacement detected by the sensors 35, 36. And a drive mechanism that drives the guide mechanisms 33 and 34 to deflect the guide rollers 31 and 32.

  The guide mechanisms 33, 34 are arranged on guide rails 33 a, 34 a and guide rails 33 a, 34 a that are inclined from the direction perpendicular to the traveling direction of the filter cloth from the upstream side to the downstream side in the traveling direction of the filter cloth. It is comprised with the carriers 33b and 34b which slide along.

  Both end portions of the guide rollers 31 and 32 are supported by carriers 33b and 34b of the guide mechanisms 33 and 34, respectively.

  The guide rails 33 a and 34 a are disposed so as to be inclined such that the outer side is located on the upstream side in the traveling direction of the filter cloth 7 and the inner side is located on the downstream side in the traveling direction of the filter cloth 7. If the traveling position in the width direction of the filter cloth 7 is in a normal state, the guide rollers 31 and 32 are arranged in a direction perpendicular to the horizontal direction with respect to the traveling direction of the filter cloth.

When the carriers 33b and 34b slide along the guide rails 33a and 34a, the guide rollers 31 and 32 are maintained in a parallel posture, and one end is upstream from the direction perpendicular to the horizontal direction with respect to the traveling direction of the filter cloth 7. The other end is inclined downstream.
When the carriers 33b and 34b slide along the guide rails 33a and 34a, the guide rollers 31 and 32 maintain a parallel posture, and one end is on the upstream side in the running direction of the filter cloth 7, and the other end is on the filter cloth 7. Inclined downstream in the running direction.

  The drive mechanism includes a cylinder mechanism 37 provided in the guide mechanism 33 and a fluid circuit 38 that controls the amount and direction of fluid supply to the cylinder mechanism 37. In the present embodiment, a case where the fluid is air will be described.

  The cylinder mechanism 37 includes a cylindrical cylinder tube 37a sealed at both ends, a piston 37b that is slidably held in the cylinder tube 37a in the axial direction, one end connected to the piston 37b, and the other end. Comprises a piston rod 37c extending outward from one end of the piston tube 37a.

  The inside of the cylinder tube 37a is partitioned into air chambers 37d and 37e by a piston 37b. The air chambers 37d and 37e are configured to be supplied with pressurized air from the fluid circuit 38.

  In the cylinder mechanism 37, the piston 37b is pushed in the axial direction by the pressure difference between the air chambers 37d and 37e before and after the piston 37b in the cylinder tube 37a, and the tip of the piston rod 37c is advanced and retracted from the cylinder tube 37a.

  Since the cylinder tube 37a is fixed to the carrier 33b of the guide mechanism 33 and the tip end portion of the piston rod 37c is fixed to the guide rail 33a, the carrier 33b is guided by the cylinder tube 37a from the cylinder tube 37a. It is moved along the rail 33a.

  The sensors 35 and 36 are fluid circuits based on the contact portions 35a and 36a urged to contact the end portion of the filter cloth 7 and the contact state of the contact portions 35a and 36a with the filter cloth 7. Actuators 35c and 36c for controlling the pressurized fluid supply ports 35b and 36b.

  The contact portions 35a and 36a are urged toward the center in the width direction of the filter cloth 7 by an elastic body, for example, a spring, and are configured to always contact even if the filter cloth 7 meanders. Further, in the control of the pressurized fluid supply ports 35b and 36b of the actuators 35c and 36c, an appropriate play is set so that chattering due to a slight movement of the contact portions 35a and 36a does not occur.

  The pressurized fluid supply ports 35b and 36b are each constituted by a three-position four-way valve, and the pressurized fluid supply ports 35b and 36b are connected to the air chambers 37d and 37e of the cylinder tube 37a of the cylinder mechanism 37 by an air tube. Yes.

  When the filter cloth 7 is traveling at a predetermined position, the pressurized fluid supply ports 35a and 36a are set to stop at the neutral position. At the neutral position, the pressurized air is not supplied to the air chambers 37d and 37e.

  When the ports are switched by the actuators 35c and 36c, the pressurized fluid supply ports 35b and 36b are configured to supply pressurized air supplied from an air supply source (not shown) to the air chambers 37d and 37e.

  Pressurized air is supplied to one of the air chambers 37d and 37e, and the piston 37b is pushed by the pressure difference. Since the cylinder mechanism 37 slides the carrier of the guide mechanism 33, the pair of guide rollers 31 and 32 move while maintaining a parallel posture.

  The manner of correction of meandering of the filter cloth 7 by the meandering correction mechanism 30 configured as described above will be described.

  As shown in FIG. 3A, when the filter cloth 7 meanders in the left direction of the traveling direction, the filter cloth 7 presses the contact portion 35a, so that the actuator 35c is actuated and the pressurized fluid supply port is operated. 35b is switched and the contact portion 36a moves until it comes into contact with the filter cloth 7 by the urging force, so that the actuator 36c is operated and the pressurized fluid supply port 36b is switched.

  The pressurized fluid supply ports 35b and 36b constitute a path for supplying pressurized air supplied from an air supply source to the air chamber 37e. The pressure in the air chamber 37e of the cylinder tube 37a becomes larger than the pressure in the air chamber 37d, the piston 37d is pushed relatively in the direction of increasing the air chamber 37e, and the piston rod 37c advances from the piston tube 37a. Be made.

  At this time, the cylinder mechanism 37 slides the carrier 33b of the guide mechanism 33 along the guide rail 33a, and the pair of guide rollers 31 and 32 incline while maintaining a parallel posture, while the filter cloth 7 moves in the traveling direction. It can be moved to the right. The carrier 34b of the guide mechanism 34 also moves along the guide rail 34a.

  In this way, the filter cloth 7 meandering in the left direction of the traveling direction is guided by the pair of guide rollers 31 and 32 moved in the right direction of the traveling direction, and the meandering is corrected.

  As shown in FIG. 3B, when the filter cloth 7 meanders in the right direction of the traveling direction, the filter cloth 7 presses the contact portion 36a, so that the actuator 36c is actuated to operate the pressurized fluid supply port. 36b is switched and the contact portion 35a moves until it contacts the filter cloth 7 by the urging force, so that the actuator 35c is operated and the pressurized fluid supply port 35b is switched.

  The pressurized fluid supply ports 35b and 36b constitute a path for supplying pressurized air supplied from an air supply source to the air chamber 37d. The pressure in the air chamber 37d of the cylinder tube 37a becomes larger than the pressure in the air chamber 37e, the piston 37d is relatively pushed in the direction of increasing the air chamber 37d, and the piston rod 37c is retracted to the piston tube 37a. Be made.

  At this time, the cylinder mechanism 37 slides the carrier 33b of the guide mechanism 33 along the guide rail 33a, and the pair of guide rollers 31 and 32 incline while maintaining a parallel posture, while the filter cloth 7 moves in the traveling direction. It can be moved to the left. The carrier 34b of the guide mechanism 34 also moves along the guide rail 34a.

  In this way, the filter cloth 7 meandering in the right direction of the traveling direction is guided by the pair of guide rollers 31 and 32 moved in the left direction of the traveling direction, and the meandering is corrected.

  Since the filter cloth 7 is repeatedly held between the filter plates 20 with a very large pressure every time the pressing process is performed, elongation occurs over time. For example, as compared with a new filter cloth, the filter cloth in use has an elongation of about 5 to 10% in the full length direction and about 3 to 7% in the width direction, and the elongation is not uniform.

  Here, since the elongation in the full length direction can be absorbed by the filter cloth tension mechanism, there is no particular adverse effect on the running of the filter cloth, but there is a case where the elongation in the width direction is partially generated.

  FIG. 4A shows a state in which a filter cloth 7 having partially expanded in the width direction is detected.

  The contact portion 35a is pressed as if the filter cloth 7 meanders to the left in the traveling direction, the actuator 35c is operated, and the pressurized fluid supply port 35b is switched. A path for supplying the pressurized air supplied from the supply source to the air chamber 37e is configured.

  The contact portion 36a is pressed as if the filter cloth 7 meanders in the right direction of the traveling direction, the actuator 36c is actuated to switch the pressurized fluid supply port 36b, and the pressurized fluid supply port 36b A path for supplying the pressurized air supplied from the supply source to the air chamber 37d is configured.

  At this time, if the elongation in the width direction of the filter cloth 7 is the same on both the left and right sides, the pressure in the air chamber 37e of the cylinder tube 37a and the pressure in the air chamber 37d are balanced, and the piston 37d does not move. The rollers 31 and 32 remain stopped at the neutral position.

  Then, when the filter cloth 7 partially extending in the width direction meanders in either the left or right direction of the traveling direction, as described with reference to FIGS. 3 (a) and 3 (b) The meandering of the cloth 7 is corrected.

  As described above, since the sensors 35 and 36 drive the guide mechanism 33 to deflect the pair of guide rollers 31 and 32 based on the difference between the respective displacement amounts, as in the conventional meandering correction device, Because of the configuration that detects one end of the traveling direction of the filter cloth, even though the filter cloth is not meandering, there is no misdetection of the partial elongation in the width direction as meandering of the filter cloth, Can now detect and correct meandering regardless of the presence of filter cloth stretch.

  Each of the above-described embodiments is an example of the present invention, and the present invention is not limited by the description. The specific configuration of each part can be appropriately changed and designed within the range where the effects of the present invention are exhibited. Needless to say.

1: filter press dewatering device 2: front frame 3: rear frame 4: side frame 5: advance / retreat mechanism 5a: rod 5b: pressing member 5c: hydraulic cylinder 6: drive roller 7: filter cloth 8: cleaning mechanism 9: tension mechanism 10 : Support mechanism 13: Base 14: Upper frame 20: Filter plate 21: Diaphragm 30: Meander correction mechanism 31 and 32: Guide rollers 33 and 34: Guide mechanisms 33 a and 34 a: Guide rails 33 b and 34 b: Carriers 35 and 36: Sensors 35a, 36a: contact portions 35b, 36b: pressurized fluid supply ports 35c, 36c: actuator 37: cylinder mechanism 37a: cylinder tube 37b: piston 37c: piston rod 37d, 37e: air chamber 38: fluid circuit

Claims (3)

A plurality of filter plates supported movably between the pressure contact state and the separation state;
An endless filter cloth sandwiched between the filter plates in the pressure contact state to form a filtration chamber;
A support mechanism for supporting the filter cloth so as to be able to travel apart from each filter plate in the separated state;
A meandering correction mechanism for correcting meandering of the filter cloth running while being supported by the support mechanism;
A filter press dewatering device comprising:
The meander correcting mechanism is:
A pair of sensors that are respectively arranged in the vicinity of the left and right ends of the filter cloth and detect the amount of deviation in the width direction of the filter cloth as it travels,
A drive mechanism that drives based on the difference between the respective displacement amounts detected by the pair of sensors,
Equipped with filter press dewatering device. The meandering correction mechanism is arranged in a state where the shaft centers are arranged in parallel with each other, one of the guide rollers is in contact with the surface of the filter cloth and the other is in contact with the back surface of the filter cloth, and the parallel posture is maintained. A guide mechanism that deflectably supports the pair of guide rollers so that the filter cloth is along the traveling direction;
2. The filter press dewatering device according to claim 1, wherein the drive mechanism drives the guide mechanism to deflect the pair of guide rollers based on a difference in displacement amount detected by the pair of sensors. The drive mechanism includes a fluid circuit that controls a fluid supply amount and a supply direction supplied to a cylinder mechanism provided in the guide mechanism that deflects the pair of guide rollers,
The sensor includes a contact portion that is biased to contact an end portion of the filter cloth, and a pressurized fluid supply to the fluid circuit based on a contact state of the contact portion with the filter cloth. The filter press dewatering device according to claim 1 or 2, comprising an actuator for controlling a port.