JP3260725B2 - Filter press cake discharge filter cloth cleaning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cake discharge filter cloth cleaning apparatus of a filter press in which a cake discharge mechanism and a filter cloth cleaning mechanism are integrated into one unit.

[0002]

2. Description of the Related Art In a conventional filter press, a cake discharge mechanism for discharging cake from a filter plate after filtration and a filter cloth cleaning mechanism for cleaning filter cloth are separately unitized beforehand. The unit is being incorporated.

[0003]

As described above, in the above-mentioned structure, since the cake discharging mechanism and the filter cloth cleaning mechanism are composed of separate units, the size of the entire filter press is increased and the number of mounting steps is reduced. There was a problem that it was complicated. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-described problems, and to provide a cake discharge filter cloth cleaning apparatus of a filter press, which can unitize a cake discharge mechanism and a filter cloth cleaning mechanism into one unit. It is in.

[0004]

In order to achieve the above object, the present invention is configured as follows. According to the first aspect of the present invention, the side beam provided along the front-rear direction between the front stand provided at one end and the rear stand provided at the other end is provided with the grip portion of each filter plate in the front-rear direction. A claw device that engages with the grip portion of the filter plate and allows the filter plate to advance and retreat in the front-rear direction along the side beam; A drive device for a claw device for driving the filter plate feed device in the front-rear direction, and a drive device for the filter plate feed device, and a filter capable of running in the front-rear direction along the side beam by driving the drive device for the filter plate feed device. A plate feeder, a filter cloth vibrator having a hammer for hitting a filter cloth hanging rod by driving an air cylinder for a filter cloth vibrator provided on an upper portion of the frame of the filter plate feeder, and a cleaning nozzle for spraying a cleaning liquid onto the filter cloth Washing with many A filter cloth cleaning device having an air cylinder provided on an upper portion of the frame of the filter plate feeder and moving the cleaning tube up and down between the filter cloths; the filter plate feeder, the filter cloth vibrator and the filter A control device for controlling the operation of the cloth cleaning device, and a cake discharge filter cloth cleaning device for a filter press. According to a second aspect of the present invention, the claw device of the filter plate feeder includes a feed claw that engages with a grip portion of the filter plate, and a filter that is located on a front side in a feed direction during the feed operation of the filter plate. A stop claw that abuts on a grip portion of the plate, and that the stop claw is engaged with a grip portion of the filter plate that is located on the front side in the feed direction that is one of the front-rear directions during the feed operation of the filter plate. A first sensor for detecting, a second sensor for detecting that the feed claw is engaged with a grip portion of the filter plate, and a feed direction which is another direction of the front-rear direction during the feed operation of the filter plate. A third sensor for detecting that the stop claw is engaged with the gripping portion of the filter plate located on the front side, and the claw device driving device includes an air cylinder that moves the claw device in the front-rear direction. The driving device for the filter plate feeding device is constituted by a motor, and the motor Driven by transmitting through the chain, first to allow running the filter plates feeder longitudinally along the side beams
An apparatus for cleaning a cake discharge filter cloth of a filter press according to an aspect is provided. According to a third aspect of the present invention, in the filter plate feeding device, the claw device is engaged with the grip portion of the filter plate located on the fixed plate side, and the claw device is movable by the claw device driving device. A mechanism for feeding the filter plates one by one to the movable plate side by moving the filter plate to the movable plate side, and the claw device is engaged with the grip portion of the filter plate located on the movable plate side, and the claw device is engaged with the claw. By running to the fixed plate side by the device driving device,
A cake discharge filter cloth cleaning apparatus for a filter press according to the first or second aspect, further comprising a mechanism for feeding the filter plates one by one to a fixed plate side. According to a fourth aspect of the present invention, the filter cloth vibrating device is configured such that when the filter plates are sent one by one to the movable plate side by the mechanism for sending the filter plates to the movable plate side of the filter plate feeder, The filter cloth vibrating device is driven to drive the filter cloth hanging rod with the hammer to vibrate the filter cloth to promote cake discharge from the filter plate. When the filter plates are sent one by one to the fixed plate side by the mechanism for sending the filter plates to the fixed plate side of the filter plate feeder, the washing pipe is passed between the filter cloths by the air cylinder of the filter cloth washing device. The cake discharging filter cloth cleaning device for a filter press according to the third aspect, wherein the cleaning liquid is sprayed from the cleaning nozzle to the filter cloth by vertically moving the filter nozzle.

[0005]

Embodiments of the present invention will be described below in detail with reference to the drawings.

A filter press according to an embodiment of the present invention includes a filter cloth vibrating device 20 as an example of a cake discharging mechanism.
D and a filter cloth cleaning apparatus 20W as an example of a filter cloth cleaning mechanism
And a cake discharge filter cloth cleaning device in which the filter plate feeding device 20T is unitized into one unit.
As a main configuration of the filter press, a control device 20 including a control circuit and the like in addition to the filter press body.
K, a screen display device 10G, sensors SR and SL, and the like. First, the filter press is shown in FIGS.
As shown in (1), it is configured to perform a filtering operation or the like as follows. As shown in FIG. 1, a large number of filter plates 3 are provided between a fixed plate (front stand) 1 and a rear stand 100 having a driving device 2 of a filter plate fastening device 20U.
, 3 are arranged, and each filter plate 3 has a handle (an example of a grip portion) 7 protruding in the lateral direction (left-right direction) as shown in FIG.
Filter plates 3,..., 3 are slidably mounted in the front-rear direction with respect to side beams 6, 6 arranged in the front-rear direction on both sides between the fixed plate 1 and the rear stand 100. It is suspended and supported. A pair of filter cloths 4, 4 are arranged between the adjacent filter plates 3, 3, and the movable plate 8 is moved to the fixed plate 1 side by the driving of the filter plate tightening device 20U. ,
3 is fastened to the fixed plate 1 side with a pair of filter cloths 4, 4 sandwiched between the adjacent filter plates 3, 3, and then filtered into the filter chamber formed between the pair of filter cloths 4, 4. The slurry to be supplied is supplied to start filtration (see step # 1 in FIG. 16). After the filtration is completed, if the filter plate is a compressed filter plate, compressed filtration is further performed as necessary (see step # 2 in FIG. 16).
Thereafter, if necessary, a center blow is performed to remove the slurry remaining in the supply hole of the slurry supply center (see step # 3 in FIG. 16), and the pressure applied to each filtration chamber via the slurry during filtration is reduced. The pressure is released (see step # 4 in FIG. 16), and before the movable plate 8 is moved from the tightening position to the retracted position at once by driving the filter plate tightening device 20U, it is slightly retracted from the tightening position. Then, the water collected between the filter plates 3 is drained (see step # 5 in FIG. 16). Thereafter, the movable plate 8 is moved in a direction away from the fixed plate 1 by driving the filter plate tightening device 20U, and then the filter plate 3 is moved one by one from the filter plate 3 close to the movable plate 8 by the filter plate feeding device 20T. The plate is moved to the plate side and opened (see steps # 6 to # 8 in FIG. 16). This plate opening operation is performed by a filter plate feeder 20T which moves forward and backward on guide rails 13A, 13A fixed to the left and right side beams 6, 6 as shown in FIGS. The filter plate feeder 20T is shown in FIGS.
As shown in FIGS. 4 and 8, handles 7, 7 of the filter plate 3 to be sent.
Device 14, 14 having pawls 27A, 27B engaging with
And drive devices 15 and 15 for claw devices, which include drive air cylinders 50 and 50 for moving the claw devices 14 and 14 in synchronization with each other, and a drive device 19 for a filter plate feed device on the left and right. ing. As shown in FIG. 4, the frame 16 of the filter plate feeding device 20T is configured to have an inverted L-shaped side surface, and the claw device driving devices 15, 15 are provided below the frame.
And a motor 1 with a brake, which is an example of a driving device for the filter plate feeder of the filter plate feeder 20T,
9 is arranged, and the motor 19 is rotated forward and reverse,
The filter plate feeder 20T is integrally moved forward and backward along the front and rear directions on the guide rails 13A, 13A via a chain 18 or the like. Each claw device 14 includes a front claw 27B on the fixed plate side and a rear claw 27A on the fastening device 20U side, and engages with the handle 7 of the filter plate 3 at the ascending position,
At the lowered position, the engagement is released. FIG. 1 shows an operation panel 10G as an example of a device for displaying the operation of the filter press on a screen. The operation panel 10G is provided with a screen display device for performing the operation of the filter press. The electric sequence control device 20K is electrically connected to the screen display device and incorporated in the operation panel 10G, and the filter press of the filter press is operated. It is movably supported along the filter plate row. As shown in FIGS. 8 to 10 and FIG. 17, a large number of sensors SR and SL are connected to the control device 20K as follows. In FIGS. 8, 9, 10, and 17, SL is used.
Sensors SL1, SL2, SL3, SL6, SL
7, SL8 are disposed on each device side on the left side of the filter plate 3, and in FIGS. 8, 9, 10 and 17, sensors SR1, SR2, SR3, SR6, SR7, SR8 with SR are attached.
Are arranged on each device side on the right side of the filter plate 3. Of the above sensors SR and SL, in FIGS. 8, 9 and 10, the sensor SR is used.
1, SL 1, SR 2, SL 2, SR 3, and SL 3 are arranged on the left and right claw devices 14, 14 for sending the filter plate 3.
The first sensors SR1 and SL1 are left and right filter plate position detection sensors that detect the filter plate 3 to be sent to open the filter plate. The second sensors SR2 and SL2 detect left and right filter plate positions for detecting the filter plate (the rear filter plate) 3 or the movable plate 8 arranged at the rear side (the movable plate 8 side) of the filter plate 3 to be sent. It is a sensor. Further, in the above embodiment, the third sensor SR
And the third sensor SR3, SL3
Are left and right position detecting sensors for detecting the filter plate (front filter plate) 3 or the fixed plate 1 arranged in front of the filter plate 3 to be fed (fixed plate 1 side). In the present embodiment, the driving devices 19 and 50 of the filter plate feeding device 20T and the vibration device 20 described later
D driving device 400 and cleaning device 20W driving device 40
1 (the driving devices 19 of the three devices 20T, 20D, and 20W,
50, 400, and 401) are connected to the control device 20K, respectively. The three devices 20T, 20D and 20W are combined into one block to constitute a cake discharge filter cloth cleaning device. The seventh sensors SR7 and SL7 in FIGS. 9 and 10 are arranged on the rear end side of the three devices 20T, 20D and 20W.
9 and 10, the sixth sensors SR6 and SL6 are arranged on the front end side of the three devices 20T, 20D and 20W. The seventh sensors SR7, SL7 are three devices 20T, 20D, 20W
Left and right storage position detection sensors for detecting the storage position (the side of the tightening device) of. The sixth sensors SR6, SL6 are left and right stop position detection sensors that detect the position where the three devices 20T, 20D, 20W advance toward the fixed plate and stop. 9 and 10, the reaction plates H1 and H1 of FIGS. 9 and 10 react with the seventh sensors SR7 and SL7, and the reaction plate reacts with the sixth sensors SR6 and SL6 on the fixed plate side. There are reaction plates H2 and H2 shown in FIGS. During the feeding of the filter plate, the cake discharge filter cloth cleaning device including the three devices 20T, 20D and 20W moves forward or backward by the amount of one filter plate 3 fed.

[0007] As described above, the filter plate 3
When moving the fixed plate from the fixed plate to the movable plate,
The operation is controlled as follows. First, after the filter plate feeding device 20T is advanced from the retreat position, that is, the retreat position to a predetermined position (see step # 6 in FIG. 16), as shown in FIG. While the piston rods 50, 50 are extended toward the fixed plate 1 and the pawl devices 14, 14 are positioned on the fixed plate 1, the filter plate feeder 20T is moved toward the fixed plate by driving the motor 19 (FIG. 16). Step # 7). Then, each claw device 14 advances to the fixed plate 1 side and stops at the filter plate 3 to be sent, for example, at the filter plate 3A. That is, first, in each claw device 14, in a state where the front claw 27B on the fixed plate side is located at the lowered position and the rear claw 27A is located at the raised position, as described above, the left and right claw devices 14,
14 moves synchronously to the fixed plate 1 side, and FIG.
0 at the position where the first sensor SR1, SL1 detects the filter plate 3A to be sent for opening, the claw devices 14, 14
To stop. In this stop position, the filter plate 3 to be fed is
A front claw 27B located at a lowered position of each claw device 14 is located below a front position of each handle 7 of A, and a rear claw 27A is located at a raised position, and a filter plate to be sent. 3A is in contact with the rear surface of each handle 7 (the surface opposite to the fixed plate 1). Next, the left and right claw devices 14, 1 of the filter plate feeding device 20T.
4, each claw 27B is raised to a raised position while being guided by guides 27G, 27G (see FIG. 8) by driving of a claw driving device (an air cylinder as an example) 27D of each front claw 27B such as an air cylinder. To engage with the front surface of each handle 7 of the filter plate 3A. The pawl devices 14 and 14 are moved by the driving of the air cylinders 50 and 50 to the movable plate 8 or the already sent filter plate by the opening distance, and the second sensors SR2 and SL are moved.
By the detection of 2, the filter plate 3A is sent to the movable plate 8 or the front surface of the already sent filter plate 3 (see step # 8 in FIG. 16).

As described above, the filter plate feeder 20T is advanced by a distance equivalent to one filter plate by the drive of the motor 19 to open the plate, and is held by the filter cloths 4, 4 between the opened filter plates 3A, 3B. Enables the cake to be discharged. At the time of discharging the cake, the filter plate feeder 20T corresponds to the upper part of the pair of filter cloth hanging rods 5, 5 for suspending and supporting the pair of filter cloths 4, 4, respectively.
Filter cloth vibrating device 20 provided on the upper part of the frame 16 of FIG.
7 and 11, the hammer 303 of D, 20D is lowered from the position shown by the solid line in FIG. 7 to the position shown by the dotted line as shown in FIGS. Hit the hanging rods 5, 5 downward,
Vibration is applied to the filter cloths 4 and 4 (see step # 9 in FIG. 16). In FIG. 1 and the like, reference numeral 12 denotes an arm for suspending and supporting the filter cloth hanging rod 5, and reference numeral 24 denotes a pin for rotatably attaching the lower end of the arm 12 to the upper end of the filter plate. 22 and 2
Reference numeral 3 denotes wheels for moving the claw device 14 and the filter plate feeding device 20T, respectively. Next, in step # 10, it is determined whether or not the cake discharge is to be repeated. In other words, it is determined whether or not all the filter plates to be opened have been retracted and opened (see step # 10 in FIG. 16). After all the filter plates have been retracted and opened, the filter cloth is filtered in step # 11. The operation of the cleaning operation is controlled as follows under the control of the control device 20K. Do. In this filter cloth cleaning operation, the filter plates retracted to the rear stand side are again sent one by one to the front stand side, and the filter cloths stretched between the filter plates are cleaned. Steps # 11 to # in FIG.
17). That is, after the filter plate feeding device 20T is retracted from the predetermined position for plate opening to the predetermined position for cleaning (see step # 12 in FIG. 16), the driving device 1 for the claw device is set.
In a state where the piston rods of the driving air cylinders 50, 50 are retracted to the movable plate side and the pawl devices 14, 14 are located on the movable plate side, the filter plate feeder 20T is driven by the motor 19 to move the filter plate feed device 20T to the movable plate side. (Step # 1 in FIG. 16)
3). Then, each claw device 14 retreats to the movable plate side and stops at the filter plate 3 to be fed, for example, at the filter plate 3X in FIG. That is, in each claw device 14, first, in the state where the front claw 27B on the movable plate side is located at the raised position and the rear claw 27A is located at the lowered position, as described above, the left and right claw devices 14, 14 moves to the movable plate side in synchronization with each other, and at the position where the filter plate 3X to be sent for cleaning is detected by the first sensors SR1 and SL1 in FIGS. 8, 9 and 10, the claw devices 14 and 14 are moved. Stop. In this stop position, the rear claw 27A at the lowered position of each claw device 14 is located below the position of the rear surface of each handle 7 of the filter plate 3X to be sent, and the front claw 27B is raised. Position
The filter plate 3X to be sent is in contact with the front surface (the surface opposite to the movable plate 8) of each handle 7 of the filter plate 3X. Next, the claw devices 14 on the left and right sides of the filter plate feeding device 20T are claw driving devices for each rear claw 27A such as an air cylinder (an air cylinder as an example).
Guides 27G, 27G by driving 27D (see FIG. 8)
Each claw 27A is raised to the raised position while being guided by, and is engaged with the rear surface of each handle 7 of the filter plate 3X. Claw device 1
4, 14 are moved to the fixed plate 1 or the already sent filter plate by the opening distance by driving the air cylinders 50, 50,
When the third sensors SR3 and SL3 detect the filter plate 3X, the filter plate 3X is sent to the fixed plate 1 or the rear surface of the already sent filter plate 3 (FIG. 1).
6 Step # 14).

As described above, the filter plate feeder 20T is moved backward by the distance of one filter plate by the drive of the motor 19 to open the plate, and the filter cloths 4 and 4 between the opened filter plates 3X and 3Y are washed. (See step # 15 in FIG. 16). As shown in FIGS. 3, 6, and 12, between the hammer 303, a washing pipe 17 provided with a large number of washing nozzles of the filter cloth washing device 20W is arranged, and an air cylinder 40 as a driving device is arranged.
The cleaning pipe 17 is lowered from the solid line position in FIGS. 3, 6 and 12 to the dotted line position between the filter cloths 4 and 4 by the driving of , 4 for cleaning. Then, step #
At 16, it is determined whether or not to repeat the filter cloth cleaning. In other words, it is determined whether or not all the filter plates to be washed with the filter cloth are advanced to perform the filter cloth cleaning (step # 16 in FIG. 16).
), Advance all the filter plates and wash the filter cloth. Thereafter, when the filtering operation is not performed, the apparatus is stopped. On the other hand, when performing the filtering operation again, step # in FIG.
Returning to the filtering operation of 1 and after all the filter plates 3 have been sent to the movable plate side, the filter plate 3 is pushed back to the fixed plate 1 side by the movable plate 8 again by the drive of the filter plate tightening device 20U, and the next (See step # 1 in FIG. 16), and the above steps are repeated (see steps # 2 to # 17 in FIG. 16).

Next, the operation of the filter plate feeder 20T will be described in more detail. FIGS. 15 and 16 show the operation of the cake discharge filter cloth cleaning apparatus of the filter press of FIG. 1 as described below. A filter plate feed start signal is issued from the operation panel 10G, and the movable plate 8
Is retracted by the opening distance by the reverse drive of the driving device 2 of the filter plate fastening device 20U after the completion of the filtration as described above. Each pair of the movable plate 8 and one filter plate 3 which is located on the fixed plate side and is to be fed by the filter plate feeder 20T, for example, the filter plate 3A in FIGS. Filter cloth suspension arm 1
The connection top 112 of the second and the twelve 12 has an opening distance L (see FIG. 5).
Located in the center of. Next, when the drive signal is input from the control device 20K to the brake-equipped motor 19 and the filter plate feed device 20T starts traveling forward (for example, traveling leftward in FIG. 1), FIG. 9 and FIG. As shown, the left and right seventh sensors SR7, SL7 on the rear lower surface of the left and right movable tables 13B, 13B of the filter plate feeder 20T move away from the left and right reaction plates H1, H1 on the left and right guide rails 13A, 13A. Further, the filter plate feeder 20T moves forward,
As shown in FIG. 9 and FIG.
The left and right eighth sensors SR8 and SL8 in the upper connecting portion of the left and right are connected to the top 11 of the left and right filter cloth suspension arms 12,.
By detecting and reacting with 2,112, a drive stop signal is input from the control device 20K to the motor 19 with brake, and the filter plate feeding device 20T stops running.

Next, left and right claw device driving devices (an air cylinder) 15, 15 on the left and right moving tables 13B, 13B at the base of the pillar of the filter plate feeding device frame 16.
Is supplied from outside via air control valves Vx, Vx, respectively. The air enters the switching valves VR3 and VL3 from the conduits FR5 and FL5, passes through the conduits FR4 and FL4 from the switching valves VR3 and VL3, and the flow control valves VRA and VLA interposed therebetween, and drives the claw device driving device 15, 1
5 enter the air supply / discharge ports at the rear of the air cylinders 50, 50, respectively. As a result, the claw device driving device 1
The pistons of the air cylinders 50, 50 advance respectively, and the left and right pawl devices 14, 14, which are respectively fixed to the tips of the piston rods, are moved to the wheels 22, 22, respectively.
, 22 are advanced under the left and right handles 7, 7 of the filter plate 3A while rolling on the left and right movable tables 13B, 13B. At this time, the air in front of the respective pistons of the air cylinders 50, 50 of the claw device driving devices 15, 15 is supplied to the air supply at the front of the air cylinders 50, 50 of the claw device driving devices 15, 15. From the outlet, air passes through flow valves VR4 and VL4 of conduits FR3 and FL3,
It is discharged from the discharge ports of the switching valves VR3 and VL3. The left and right claw devices 14, 14 advance to below the handles 7, 7 of the filter plate 3A and stop pawls 27A, 27A (here, when the case where the filter plate 3 is sent to the movable plate side, The rear claw 27A, 27A located at the rear of the devices 14, 14 is a claw device 14, 1
4 function as stop pawls. ) Hits the rear surface of the handles 7, 7 of the filter plate 3A, the first sensor SR1, FIG.
The SL1 reacts with the lower surfaces of the handles 7, 7 of the filter plate 3A to detect the handles 7, 7, and controls the air supply provided at the rear of the air cylinders 50, 50 of the claw device driving devices 15, 15 under the control of the control device 20K. The air supply to the outlet is stopped, and the claw device 1
4, 14 stop.

Before the pawl devices 14, 14 approach the filter plate 3A, the feed pawls 27B, 27B (when the filter plate 3 is fed to the movable plate side, the front pawl located in front of the pawl devices 14, 14) 27
B and 27B function as feed claws, respectively. ) Descends so as not to contact the handles 7, 7 and stops 27
A, 27A (when the filter plate 3 is sent to the movable plate side, the rear claw 2
7A and 27A function as stop claws of the claw devices 14 and 14, respectively. ) Are raised so as to come into contact with the handles 7,7. Here, in order to raise the front pawls 27B, 27B, air is supplied to the pawl driving devices 27D, 27D of the front pawls in the pawl devices 14, 14 via the air control valves Vx, Vx. Then, the switching valves VR1 and VL1 in the conduits FR1 and FL1 may be opened. Also, the back nail 27A,
In order to raise 27A, a claw driving device (an air cylinder as an example) of the claw device located behind the claw devices 14, 14 is required.
In order to supply air to C and 27C, conduits FR2 and F
The switching valves VR2 and VL2 in L2 may be opened. In order to lower the front claws 27B, 27B and the rear claws 27A, 27A, respectively, the supplied air may be discharged from each air cylinder.

The first left and right sensor units of the left and right claw devices 14,
The support SR1, SL1 is the lower surface of the left and right handles 7, 7 of the filter plate 3A.
When these are detected by reacting with
Sends a signal to the control device 20K and sends it to the claw devices 14 and 14.
Certain front nails (jaws 27B, 27 functioning as feed nails)
Air control valves Vx,
Air is supplied through Vx to feed nails 27B, 27B.
While raising the claw device driving devices 15, 15.
In the front of the cylinders 50, 50,
Is supplied, and the air filters of the driving devices 15, 15 for the claw device are supplied.
Air is supplied from conduits FR at the rear of the cylinders 50 and 50 to the conduit FR.
Switching valve V through flow control valves VRA and VLA of FL4 and FL4
R3, VL3 are discharged from the discharge ports, and the driving device
The pistons of the air cylinders 50, 50 in
Switch to reverse. At this time, the claw device driving device 15,
Movement time of each piston of 15 air cylinders 50
Is measured with a measuring instrument. Also, the flow control valves VRA, VL
The air outflow amount of A is electrically controlled. Left and right nails
The feed error of the device driving devices 15, 15 is controlled as follows.
It is easily corrected by the tuning operation of the tuning control unit of the control device 20K.
You. That is, the drive for the claw device for feeding the filter plate 3 while the filter plate is being fed.
If there is a difference in feed speed between the moving devices 15, 15,
The difference in speed is corrected by the controller 20K in the following manner,
That is, by adjusting the speed, the driving device for the two claw devices
Synchronize 15,15. This tuning operation is controlled by the control unit.
This is performed by the tuning control unit of the device 20K. That is, the left and right nails
Of the air cylinders 50 of the device driving devices 15
Left and right forward limit detection sensors
From the position to be detected by
Each time T when moving the distance to the position to be detected
1 and T2 are obtained with a measuring instrument, and the difference between the two times (T1-T2) is
Judges whether it is within the allowable range.
Control is not performed.
Current flow setting current value FD of control valves VRA and VLA is set
Flow control valve farther away from center current value FDS
Current flow setting current value FD is constant current value, that is, constant
Correction current a ₁To the set center current value FDS
So that the flow rate
By changing the amount of air passing through the valve,
Of the air cylinders 50 of the mounting drive devices 15
The control unit 20 controls the tuning of the moving speed of each piston.
K automatically performs it. Therefore, in the long term
Use the load fluctuation, even if the guide hits the syringe
Automatically synchronize even if there is a problem with
Control can be performed, and the driving devices 15 for the left and right claw devices can be manually operated.
Of each piston of the 15 air cylinders 50, 50
It is not necessary to adjust the moving speed in synchronization.

When the respective pistons are switched to the backward movement, the left and right claw devices 14 are supported by the left and right moving tables 13B, 13B while being rolled by the wheels 22,. At this time, the filter plate 3A is sent to the movable plate 8 while the feed claws 27B, 27B are engaged with the front surfaces of the handles 7, 7 of the filter plate 3A. As a result, the left and right arms 12, 12 of the filter plate 3B located in front of the filter plate 3A, and the movable plate 8
Are connected to the left and right arms 12 of the filter plate 3A, and are located at the center of the new opening distance. When the feed claws 27B, 27B are engaged with the handles 7, 7 of the filter plate 3A and start feeding the filter plate 3A, the rear claw (stop pawl) of the claw devices 14, 14 is controlled by the control device 20K. The stop claw 27A, 27A is lowered while being guided by the guides 27G, 27G (see FIG. 8) by discharging the air supplied to the claw driving devices 27C, 27C of the claws 27A, 27A) functioning as the claw. Claw device 1
4 and 14 move to the movable plate side, and the second sensors SR2 and SL2 of the claw devices 14 and 14 move to the left and right protrusions 8 on the movable plate side.
The controller 2 reacts with the lower surfaces of the f
When the detection signal is input to 0K, under the control of the control device 20K, the air cylinder 5 of the claw device driving devices 15, 15 is controlled.
The air supply to the front supply and discharge ports 0 and 50 is stopped, and the claw device driving devices 15 and 15 stop the backward movement of the claw devices 14 and 14. While the filter plate 3A is sent to the movable plate side and while the filter plate feeder 20T is stopped, the filter plate 3A
The cake is discharged from the filter cloths 4, 4 suspended on the arms 12,..., 12 between A, 3B, and the filter cloth vibrating devices 20D, 20D are operated. Further, the filter cloth cleaning device 20W may be operated as needed.

Next, the filter plate 3 arranged in front of the filter plate 3A
B is sent to the movable plate side. In the same manner as described above, a drive signal is input from the control device 20K to the brake motor 19, and the filter plate feed device 20T moves forward toward the fixed plate. The eighth sensor SR8, SL8 of the advanced filter plate feeder 20T reacts with the connection tops 112, 112 of each pair of arms 12, 12 straddling between the filter plate 3A and the filter plate 3B to detect these, Under the control of the control device 20K, the filter plate feeding device 20T stops. The air cylinder 50 of the driving device 15, 15 for the claw device,
Air is supplied to each of them, and the claw devices 14, 14 are advanced to below the handles 7, 7 of the filter plate 3B on the moving tables 13B, 13B. When the pawl devices 14, 14 separate from the filter plate 3A, the front feed pawls 27B, 27B disengage from the front surfaces of the handles 7, 7 of the filter plate 3A and descend, and the rear stop pawl 27A. , 27A rise after passing through the projections 8f, 8f of the movable plate 8 and the handles 7, 7 of the filter plate 3A. When the claw devices 14, 14 advance to the filter plate 3B, the rear stop claws 27A, 27A strike the rear surfaces of the handles 7, 7 of the filter plate 3.

At this time, the first sensors SR1 and SL1 of the claw devices 14 and 14 react with and detect the lower surfaces of the handles 7 and 7 of the filter plate 3B, and the front feed claw 27B is controlled by the control device 20K. , 27B rise and the control device 20
By the control of K, the respective pistons of the air cylinders 50, 50 of the claw device driving devices 15, 15 are switched to the reverse. As in the case of sending the filter plate 3A, the driving device 1 for the claw device
The movement time of each piston of the air cylinders 50, 50 is measured by the measuring device, and the amount of air flowing out of the flow control valve is electrically controlled. Control device 20
By the control of K, the claw devices 14 and 4 move the movable tables 13B and 13
B, the filter plate 3B is sent to the previously sent filter plate 3A while the forward feed claws 27B, 27B are engaged with the front surfaces of the handles 7, 7 of the filter plate 3, and the second sensors SR2, SL2 Stops by detecting the filter plate 3A. As a result, the left and right arms 12, 1 of the filter plate 3C located in front of the filter plate 3B.
The connection tops 112, 112 between the left and right arms 12, 12 of the filter plate 3B sent to the movable plate side are also located at the center of the new opening distance. Thereafter, similarly, the control device 20
By sending the filter plate 3 to the last filter plate 3 under the control of K, the filter plate feed for sending the filter plates 3,...

Next, when returning the filter plate feeder 20T to the standby position behind the movable plate, the filter plate feeder 20T is advanced by a signal from the controller 20K. Forward feed claw 27
B, 27B are disengaged from the front surfaces of the handles 7, 7 of the filter plate 3 and remain down, and the rear stop claws 27A, 27
A does not rise even if it passes under the handle.
When the filter plate feeder 20T advances, the filter plate feeder 20T
The Tth eighth sensors SR8, SL8 react with and detect the connection tops 112, 112 of the pair of left and right arms 12,..., 12 straddling between the fixed plate 1 and the filter plate 3, and detect these. The filter plate feeder 20T stops. Further, the sixth sensors SR6 and SL6 (see FIG. 9) on the lower surfaces of the front portions of the movable bases 13B and 13B are connected to the guide rails 13A and 13B.
A reacts with the reaction plates H2 and H2 (see FIG. 10) at the front of A to detect them. As a result of these detections, under the control of the control device 20K, the filter plate feeding device 20T is set to the rearward position toward the rear of the movable plate, and under the control of the control device 20K, the air cylinder 50 of the claw device driving devices 15, 15 is controlled. , 50, the pistons are positioned at the rear end positions and the pawl devices 14, 14 are moved backward, and the filter plate feeder 20T is driven by the drive motor 19 with brake to move the filter plate feeder 20T to the guide rails 13A, 13A. Reverse up.
The seventh sensors SR7, SL7 on the lower surface of the rear part of the movable tables 13B, 13B of the filter plate feeder 20T
When the rear reaction plates H1 and H1 on A and 13A are detected,
The drive motor 19 with brake is controlled by the control device 20K.
To stop driving. As a result, the filter plate feeder 20T returns to the standby position behind the movable plate.

Next, as shown in FIG. 10, a case where the filter plates 3 located on the movable plate side are fed one by one to the fixed plate side will be described. As a result of sending all the filter plates 3,..., 3 to the movable plate side, a filter plate 3 (FIG.
Is assumed to be separated from the fixed plate 1 by a predetermined opening distance toward the movable plate 8. In this state, the connecting tops 112 of the left and right arms 12, 12 of the fixed plate 1 and the left and right arms 12, 12, of the filter plate 3Z,
112, the eighth sensor SR8, SL of the filter plate feeder 20T
8 reacts and detects these, and stops the filter plate feeder 20T under the control of the controller 20K. in this case,
The rear claws 27A, 27A of the pawl devices 14, 14 serve as feed pawls, and the front pawls 27B, 27B serve as stop pawls of the pawl devices 14, 14. By the control of the control device 20K, the claw device driving devices 15, 15 in the stopped filter plate feeding device 20T are controlled.
Air is supplied to the air cylinders 50 and 50 of the claw device 1.
4 and 14 are retracted to the filter plate 3Z.
The first sensors SR1 and SL1 are provided with handles 7 and 7 of the filter plate 3Z.
Are detected in response to the control signal, and the rear feed claws 27A, 27A are raised behind the handles 7, 7 of the filter plate 3Z under the control of the controller 20K. At this time, the front stop claws 27B, 27B are in contact with the front surfaces of the handles 7, 7 of the filter plate 3Z. With the rear feed pawls 27A, 27A engaged with the rear surfaces of the handles 7, 7 of the filter plate 3Z, the pawl device driving devices 15, 15 are driven by the control of the control device 20K, and the pawl devices 14, 14 are driven. The filter plate 3Z is advanced to send the filter plate 3Z to the fixed plate 1. At this time, the front stop claws 27B, 27B are descending. When the filter plate 3Z is sent to the fixed plate 1, the claw device 1
The fourth and fourth sensors SR3 and SL3 react to the left and right protrusions of the fixed plate 1 (the left and right protrusions 8f of the movable plate 8 or the left and right protrusions protruding in the left and right direction like the left and right handles 7 of the filter plate 3). These are detected, and as a result, the air cylinder 5 of the claw device driving devices 15 and 15 is controlled by the control device 20K.
Each of the pistons 0 and 50 switches to reverse. As a result, the rear feed claws 27A, 27A are attached to the filter plate 3Z.
From the rear surface of the handles 7, 7 to separate and descend.
Under the control of the control device 20K, the claw devices 14, 14 move backward to the next filter plate 3Y to be sent. When the first sensors SR1 and SL1 of the claw devices 14 and 14 detect and react to the lower surfaces of the handles 7 and 7 of the filter plate 3Y, under the control of the control device 20K, the rear feed claw 27A and 27A It rises behind the handles 7, 7 of the filter plate 3Y. Front stop claw 27B, 27B
Is hit on the front surface of the handles 7, 7 of the filter plate 3Y.
By the control of 0K, the filter plate feeder 20T stops the reverse drive. At this time, since a predetermined opening distance is opened between the filter plate 3Y and the filter plate 3Z, the cake discharge filter cloth cleaning is performed by the control of the controller 20K while the filter plate feeder 20T is stopped. And so on.

Next, under the control of the controller 20K, the filter plate feeder 20T is moved backward from the fixed plate side to the movable plate side,
Similarly to the above, the eighth sensors SR8 and SL8 are connected to the left and right arms 12, 12 of the filter plate 3Y and the left and right arms 12, 1 of the filter plate 3Z.
When this is detected in response to the second connection top portions 112, 112, the filter plate feeding device 20T stops running under the control of the control device 20K. In this state, the control unit 2 keeps the feed claws 27A, 27A in contact with the rear surfaces of the handles 7, 7 of the filter plate 3Y.
Under the control of 0K, the claw device driving devices 15, 15 are driven to advance the claw devices 14, 14 on the movable bases 13B, 13B, and the filter plate 3Y is sent to the filter plate 3Z, and the third sensor SR
3. The operation stops when SL3 detects the filter plate 3Z.
As a result, the left and right arms 12, 12 of the filter plate 3Y and the left and right arms 12, 12 of the posterior filter plate 3X adjacent to the filter plate 3Y.
Is located at the center of the new opening distance.

Thereafter, the filter plate 3X is similarly sent to the fixed plate side under the control of the control device 20K. FIG. 10 shows a state in which the filter plate feeding device 20T sends the filter plate 3X. By sending the filter plate 3 to the last filter plate 3 under the control of the control device 20K, the filter plate feed for sending the filter plates 3,..., 3 to the other fixed plate side is completed. Then, under the control of the control device 20K, the rear feed claws 27A, 27A and the front stop claws 27B, 27B
To return the filter plate moving device 20T to the standby position behind the movable plate as described above. In addition, as described above, the cake discharge filter cloth cleaning apparatus in which the cake discharge mechanism and the filter cloth cleaning mechanism are unitized as one unit is configured to previously set the filter plate feeder 20T and the filter The cake vibrating apparatus 20D and the filter cloth cleaning apparatus 20W can be integrated into a single unit. The cake discharge filter cloth cleaning apparatus unitized in this way includes the front stand 1 provided at one end and the front stand 1 provided at one end. A filter in which a handle 7 of each filter plate 3 is slidably slid along the front-rear direction on a pair of side beams 6, 6 provided along the front-rear direction with a rear stand 100 provided at the other end. As shown in FIG. 13, it can be incorporated into the press body. That is, after the movable bases 13B, 13B are mounted so as to be mounted on the guide rails 13A, 13A fixed to the side beams 6, 6, the filter plate feeder 20T,
The filter cloth vibrating apparatus 20D and the filter cloth cleaning apparatus 20W
The filter press as shown in FIG. 14 can be completed by appropriately connecting the filter press body control device 20K and the like.

According to the above-described embodiment, the cake discharging mechanism and the filter cloth cleaning mechanism, in other words, the filter plate feeding device 20T for allowing the filter plate 3 to run in the front-back direction, and the filter plate feeding device 20
A filter cloth vibrating device 20D provided at the upper part of the frame of T and vibrating the filter cloth 4 and a filter cloth cleaning device 20W provided at the upper part of the frame of the filter plate feeder 20T and spraying the cleaning liquid onto the filter cloth 4 for cleaning. By providing the filter cloth vibrating device 20D and the filter cloth cleaning device 20W respectively on the upper part of the frame of the filter plate feeding device 20T, the filter cloth vibrating device is provided in one unit centering on the frame 16 of the filter plate feeding device 20T. 20
D, the filter cloth cleaning device 20W, and the filter plate feeding device 20T can be unitized. Therefore, the size and weight of the device can be reduced and the cost can be reduced. Further, as described above, since the cake discharging mechanism and the filter cloth cleaning mechanism are assembled into one unit to form a unit, the method of assembling the filter press is easy as shown in FIGS. Can be shortened. In addition, the filter plate feed mechanism is capable of moving forward and backward to feed the filter plate 3 in both front and rear directions (both feed possible) by detecting the positions of the filter plate 3, the movable plate 8 and the fixed plate 1 by the sensor. The cycle time of the cake discharging and filter cloth washing steps can be shortened, and the throughput of the filter press can be increased. That is, as shown in FIG. 15, conventionally, in the cake discharging step, by repeating the operations of ~ described in the column of "cake discharging" in FIG. 15, both the cake discharging and the filter cloth cleaning are performed. Is working. That is, while feeding the filter plates one by one only from the fixed plate side to the movable plate side in one of the front-back directions, for example, first, the cake is discharged, and after the cake discharge is completed, all the filter plates are temporarily moved to the fixed plate side. After being sent by the movable plate, etc., the filter cloth is washed while the filter plate is sent one by one only from the fixed plate side to the movable plate side again, so once the cake is discharged, all the filter plates are fixed once An operation of feeding a movable plate or the like to the plate side is required, and there has been a problem that the cycle time is long. On the other hand, according to the above-described embodiment, in the cake discharging process, the operations described in (1) described in the column of “cake discharging” in FIG. 15, that is, from one direction in the front-rear direction, for example, from the fixed plate side. Perform the cake discharge while feeding the filter plates one by one only to the movable plate side, and then perform the filter cloth cleaning operation by sending the filter plates one by one from the movable plate side to the fixed plate side. Comes. Therefore, the cycle time can be reduced. Further, since the vertical movement of the cleaning pipe 17 of the filter cloth cleaning mechanism is performed by the air cylinder 401,
Even in the event of an abnormality involving a breakage of a machine in which a force higher than the air pressure is applied, the machine is less damaged and safer than a conventional mechanical lifting mechanism using a pantograph. In addition, as an effect which can send a filter plate to both directions, the following effects are further obtained. In other words, in the conventional filter cloth cleaning process, after the cake discharging process, all the filter plates are tightened once by the filter plate tightening device. Therefore, if the control operation is not precisely performed, the compressed membrane is tightened. May be damaged. On the other hand, in the above embodiment, since the filter plate can be sent in both directions, it is not necessary to tighten all the filter plates once after the cake discharging step and before the filter cloth washing step, and the damage to the pressed membrane is reduced. , Lifespan can be extended. Note that the present invention is not limited to the above embodiment, and can be implemented in other various aspects. For example, the screen display device can be easily installed at an appropriate place of the filter press. The filter press may be of the single, double or squeeze type. Further, the present invention does not depend on the supply means of the stock solution. The filter cloth may be hung on the filter plate in a traveling manner or may be hung in a fixed manner. The filter plate may be opened one by one or a plurality of sheets.

[0022]

According to the present invention, a cake discharging mechanism and a filter cloth cleaning mechanism, in other words, a filter plate feeding device capable of moving the filter plate in the front-rear direction, and a filter provided on the upper portion of the frame of the filter plate feeding device. A filter cloth vibrating device that vibrates the cloth, and a filter cloth cleaning device that is provided at an upper portion of the frame of the filter plate feeding device and that sprays a cleaning liquid onto the filter cloth to clean the filter cloth; By providing the filter cloth feeding device on the upper portion of the frame, the filter cloth vibrating device, the filter cloth cleaning device, and the filter plate feeding device can be unitized into one unit. Therefore, the size and weight of the device can be reduced and the cost can be reduced. In addition, since the cake discharging mechanism and the filter cloth cleaning mechanism are assembled into one unit to form a unit, the filter press assembling method is easy and the maintenance time can be reduced. In addition, the filter plate feed mechanism can move forward and backward by the position detection by the sensor and send it in both directions of the filter plate back and forth (both feeds are possible), shortening the cycle time of cake discharge and filter cloth washing process And the throughput of the filter press can be increased. As described above, the filter plate can be sent in both directions. That is, in the conventional filter cloth cleaning process, after the cake discharging process, since all the filter plates are tightened once by the filter plate tightening device, the control operation must be performed precisely.
Tightening can damage the compression membrane. On the other hand, in the above embodiment, since the filter plate can be sent in both directions, it is not necessary to tighten all the filter plates once after the cake discharging step and before the filter cloth washing step, and the damage to the pressed membrane is reduced. , Lifespan can be extended. In addition, since the up and down of the washing pipe of the filter cloth washing mechanism is performed by an air cylinder, even in the case of an abnormality involving mechanical damage such as applying a force higher than the air pressure, the conventional pantograph mechanical lifting mechanism can be used. In comparison, the machine is less damaged and safe.

[Brief description of the drawings]

FIG. 1 is a side view of a filter press according to an embodiment of the present invention.

FIG. 2 is a plan view of the filter press of FIG.

FIG. 3 is a front view of a filter plate and peripheral devices of the filter press of FIG. 1;

FIG. 4 is a perspective view of a cake discharge filter cloth cleaning device in which the cake discharge mechanism and the filter cloth cleaning mechanism are unitized into one unit in the filter press of FIG.

FIG. 5 is a side view of the cake discharge filter cloth cleaning device of the filter press of FIG. 1;

FIG. 6 is a perspective view of a filter cloth cleaning mechanism of the cake discharge filter cloth cleaning apparatus of the filter press of FIG. 1;

FIG. 7 is a side view showing a relationship between a filter cloth vibrating device and a filter plate of the cake discharge filter cloth cleaning device of the filter press of FIG. 1;

FIG. 8 is an exploded perspective view of a claw device of a filter plate feeding device of the cake discharge filter cloth cleaning device of the filter press of FIG. 1;

FIG. 9 is an explanatory view showing a state in which the filter plate feeding device of the cake discharge filter cloth cleaning device of the filter press of FIG. 1 sends the filter plate 3A to the movable plate side.

FIG. 10 is an explanatory view showing a state in which the filter plate feeding device of FIG. 9 sends the filter plate 3X to the fixed plate side.

FIG. 11 is an explanatory view showing a cake discharge state of the filter press of FIG. 1 when the filter plate vibrating device of the cake discharge filter cloth cleaning device is operated.

FIG. 12 is an explanatory view showing a filter cloth cleaning state of the cake press filter cloth cleaning apparatus of the filter press of FIG. 1 by operating the filter cloth cleaning apparatus.

FIG. 13 is an explanatory view showing a state where the cake discharge filter cloth cleaning device of the filter press of FIG. 1 is incorporated.

FIG. 14 is an explanatory view showing a state in which the cake discharge filter cloth cleaning device of the filter press of FIG. 1 is incorporated.

FIG. 15 is an explanatory view showing the operation of the cake discharge filter cloth cleaning device of the filter press of FIG. 1;

FIG. 16 is a flowchart showing the operation of the cake discharge filter cloth cleaning device of the filter press of FIG. 1;

17 is an explanatory diagram showing a connection relationship between the control device of the filter press of FIG. 1 and each sensor and the like.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Fixed plate, 2 ... Drive device, 3 ... Filter plate, 4 ... Filter cloth, 5 ...
Filter cloth hanging rod, 6 ... side beam, 7 ... handle, 8 ... movable plate, 10G ... operation panel, 12 ... arm, 13 ... guide rail, 14 ... claw device, 15 ... claw device drive device, 16 ... filter plate Feeder frame, 17 ... Wash pipe, 18 ... Chain,
19: Motor, 20D: Vibration device, 20F: Receiving device,
20K: Control device, 20T: Filter plate feed device, 20U: Tightening device, 20W: Cleaning device, 22, 23: Wheel, 24 ...
Pin, 25: Receiving tray, 27: Filter plate feed claw, 27A, 27B
... Front and rear nails, 27C and 27D. Front and rear nail driving devices, 27G. Guide, 50. Air cylinder, 303. Hammer, 400, 4.
01 ... Air cylinder.

Claims (4)

(57) [Claims] 1. A side beam (6) provided along a front-rear direction between a front stand (1) provided at one end and a rear stand (100) provided at the other end, and each filter plate (3). In the filter press in which the holding portion (7) of the filter press is slidably slid along the front and rear direction, the filter plate is engaged with the holding portion of the filter plate and the filter plate is moved forward and backward along the side beam. Claw device (1
4) a driving device (15) for a claw device for moving the claw device in the front-rear direction; and a driving device (19) for a filter plate feeding device, wherein the claw device (14) and the claw device driving device are provided. (15) is provided on guide rails (13B) provided on the left and right below the filter plate feeder, and can be driven in the front-rear direction along the side beam by driving the drive device for the filter plate feeder. A filter cloth vibrator having a filter plate feeder (20T) and a hammer (303) which hits a filter cloth suspension rod (5) by driving an air cylinder (400) for a filter cloth vibrator provided on the upper part of the frame of the filter plate feeder. Equipment (20
D), a washing pipe (17) provided with a large number of washing nozzles for spraying a washing liquid onto the filter cloth, and a washing pipe provided at an upper portion of a frame of the filter plate feeding device and vertically moving the washing pipe between the filter cloths (4). Filter cleaning device (20) having an air cylinder (401)
W) to form a unit as one unit that can be incorporated into the filter press. Further, the filter plate feeder (20T), the filter cloth vibrator (20D), and the filter cloth cleaning device (20W) A) a cake discharge filter cloth cleaning device for a filter press, comprising a control device (20K) for controlling the operation of (2). 2. The claw device of the filter cloth feeding device (20T) includes a feeding claw (27B, 2B) that engages with a grip portion of the filter plate.
7A) and a stop claw (27A, 27B) that comes into contact with a gripping portion of the filter plate located on the front side in the feed direction during the feed operation of the filter plate.
And a first sensor (SR) for detecting a filter plate (3) to be fed in one of the front-rear directions during the feeding operation of the filter plate.
1, SL1); a second sensor (SR2, SL2) for detecting a filter plate arranged at a position behind the filter plate (3) to be sent; and a filter arranged at a position in front of the filter plate to be sent. A third sensor (SR3, SL3) for detecting a plate, wherein the driving device for the pawl device is constituted by an air cylinder (50) for moving the pawl device in the front-rear direction; 2. The apparatus according to claim 1, wherein the apparatus is constituted by a motor (19), and the drive of the motor is transmitted through a chain (18) so that the filter plate feeder can travel in the front-rear direction along the side beam. Filter press cake discharge filter cloth cleaning device. 3. The filter plate feeding device (20T), wherein the claw device is engaged with the grip portion of the filter plate located on the fixed plate side, and the claw device is moved by the claw device driving device to the movable plate side. And a mechanism for feeding the filter plates one by one to the movable plate side, and the claw device is engaged with the grip portion of the filter plate located on the movable plate side, and the claw device is used for the claw device. 3. The cake discharge filter cloth cleaning apparatus for a filter press according to claim 1, further comprising a mechanism for feeding the filter plates one by one to the fixed plate side by running the filter plate to the fixed plate side by a driving device. 4. The filter cloth vibrating device (20D) is configured to send the filter plates one by one to the movable plate side by a mechanism for sending the filter plates to the movable plate side of the filter plate feeder (20T). By driving the air cylinder (400) for the filter cloth vibrating device, the filter cloth is vibrated by hitting the filter cloth hanging rod (5) with the hammer to accelerate the cake discharge from the filter plate; The filter cloth cleaning device (20W) is provided with the filter plate feeding device (2
0T), when the filter plates are sent one by one to the fixed plate side by the mechanism for sending the filter plates to the fixed plate side, the air cylinder (401) of the filter cloth washing device causes the filter cloths (4) to pass between the filter cloths. The cake discharge filter cloth cleaning apparatus of a filter press according to claim 3, wherein the cleaning pipe (17) is moved up and down to inject a cleaning liquid from the cleaning nozzle to the filter cloth.