JP2014108415A - Opening plate method of filter press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening plate method of a filter press which can easily release engagement between a stopper receiving a reaction force of filter plates and a rail.SOLUTION: In an opening plate method of a filter press, a stopper 5 at an end part of filter plates 4 is moved to the filter plate side and the filter plates slidably arranged in parallel are closed, the stopper is engaged with a rail 3, a fastening device 11 is extended to press a movable head 6 disposed between the filter plates and the stopper, and an undiluted solution is pressed in therebetween. Thereafter, the fastening device is contracted using an engagement blocking regression of the movable head so that the stopper is moved to the closed plate side, the fastening device is extended so that the movable head is moved to the closed plate side, and locks 15, 20 are received while engagement parts of the stopper and the movable head are separated. Therefore, the locks are easily released without damaging the engagement devices.

Description

  The present invention is a method for opening a filter plate after a dehydration process, and after dehydration, a device that releases a reaction force from the filter plate after moving a stopper in the closing plate direction and starts opening the filter plate The present invention relates to a press opening method.

In a multi-room large filter press, the drive chain is stretched along the rail that supports the filter plate group, the stopper connected to the drive chain is moved in the direction of the filter plate, the filter plate group is sequentially pressed, and the stopper is moved to the rail. A closed plate method is known in which the filter plate group is further tightened by a tightening device mounted on a stopper after engaging and preventing retraction.

In the tightening method described in Patent Document 1, after tightening the filter plate group with the screw screw of the stopper, the movable head is engaged with the rail to prevent retraction, the stopper is disengaged, and then the press plate is applied. A filter press tightening method for tightening filter plates and starting press-fitting is disclosed. The reaction force (back pressure) of the filter plate group is all received by the filter press body through the movable head.

Japanese Patent No. 3539310

The filter press tightening method disclosed in Patent Document 1 is such that after the filter plate group is closed, the movable head is engaged with the rail, and the filter plate group is tightened from the closed plate side with a press plate at a position opposite to the filter plate group. Is. After squeezing and dewatering, the fastening by the press plate is released, and then the engagement between the movable head and the rail is released. Since the lock provided on the movable head is turned to the rail side and the movable head is prevented from retreating by engaging with the rail block protruding on the rail, there is no description in the detailed description of the invention. At the time of releasing the lock, the lock is released while bringing the engagement surface with the rail block into sliding contact. Therefore, there is a possibility that the engagement surface is worn or seized due to frictional heat.

The present invention engages a stopper for tightening the filter plate with the rail, and with respect to the filter press that receives the reaction force at the time of dewatering from the filter plate by the filter press main body, the engaging portion between the stopper and the rail is separated after the dehydration is completed. Thereafter, a method of opening a filter press is provided in which the engagement device of the stopper is released to open the filter plate.

  The filter press opening method according to the present invention includes a stopper for opening and closing a filter plate disposed on both sides of the filter plate, and a movable head connected to one end or both ends of the filter plate and a fastening device mounted on the stopper are connected. After the plate is closed, the filter press that presses the filter plate and engages the stopper with the rail to perform dehydration processing is provided with a lock that prevents the reverse movement by engaging the rail with the stopper and the movable head. After that, the movable head is engaged with the rail, the fastening device is contracted and the stopper is moved to the filter plate side, and then the fastening device is extended to move the movable head to the filter plate side. The lock is released with the engaging part separated from the rail and the filter plate is opened, and the engaging surface of the engaging device does not slide when the lock is released. Parts of damage life can be achieved without. Further, since the tightening device mounted on the stopper is used to move the filter plate to which the dewatered cake adheres when the stopper is unlocked, the capacity of the driving machine for moving the filter plate can be reduced.

Also, a lock is swingably suspended on both shoulders of the tightening device base, and an engagement rod is constructed by connecting the piston rod of the electric cylinder pivotally attached to the back of the tightening device base to the lock. With the lock engaged with the rail block fixed to the rail by rotating it to the side of the attachment device base, the fastening device is extended to depress the movable head and dehydrate it, and it swings on both shoulders of the movable head. The lock is movably suspended, and the piston rod of the electric cylinder pivotally attached to the back of the movable head is connected to the lock to form an engagement device, and the lock is rotated to the side of the movable head and fixed to the rail. In the state where the lock is engaged with the rail block, the tightening device is contracted and the tightening device base is advanced to separate the lock from the rail block, so that the locking device and the movable head are prevented from moving backward. Can be stored inside a when not in use.

Further, a filter plate side screwed to a case for fixing each rail block to be engaged with the lock to the rail, an adjustment bolt inserted into the case from above or below the case, and an adjustment bolt inside the case) A movable rail block is composed of an internal block that has an inclined surface and an external block that is in contact with the inclined surface of the internal block and partially protrudes outside the case, and the internal block is moved up and down by the screwing amount of the adjusting bolt By adjusting the protrusion length of the external block and adjusting the engagement position with the lock in the direction of the opening and closing plate, the rail block can be adjusted back and forth according to the stop position of the movable head after retightening. It can respond to the increase and decrease of.

The method of opening the filter press according to the present invention is such that the engagement member after dehydration can be easily released in the filter press that receives the reaction force from the filter plate during dehydration by the engagement between the filter plate row and the rail. It can be done.
Specifically, after the filter plate is pressed and closed by the stopper, the engagement device that engages the stopper and the rail for preventing the filter plate from moving backward is moved in the direction of the closed plate by moving the stopper in the closing plate direction. After separating the engagement surfaces, the engagement device is released. The filter plate having the dewatered cake is heavy, and when the stopper is moved in the closing plate direction, the mounted clamping device is used, so that the capacity of the drive machine that drives the drive chain can be reduced. Since the engagement surface of the engagement device is not slid when the lock is released, the lock can be released with a small amount of power, and there is no damage to the parts, thereby extending the life. Since the stopper is mechanically engaged with the filter press body (rail), no special drag is required.

It is a schematic side view of the filter press concerning this invention. Similarly, it is a principal part enlarged plan view of a clamping device. Similarly, it is a rear view of a stopper provided with an engagement device. Similarly, it is a top view of a stopper provided with an engagement device. Similarly, it is a rear view of a movable head provided with an engagement device. Similarly, it is a detailed view of a movable rail block. Similarly, (a) Immediately after closing the plate, (b) is a plan view of the main part in a state where the stopper lock is activated. Similarly, (a) at the time of dehydration, (b) is a plan view of the main part in a state where the lock of the movable head is activated. Similarly, it is the principal part top view of the state which advanced (a) the stopper forward, and (b) the movable head forward. Similarly, it is the principal part top view of the state which released a lock | rock and (b) contracted | tightened the clamping device.

The filter press according to the present invention will be described in detail with reference to the drawings. First, FIG. 1 is a schematic side view showing a state in which a filter plate of the filter press is closed. The filter press 1 has a large number of filter plates 4 arranged in parallel on a pair of rails 3 and 3 bridged between frames 2 and 2 erected on the front and rear sides. Stoppers 5 and 31 are slidably arranged in parallel on both sides of the filter plate 4. A movable head 6 is provided between the filter plate 4 and the rear stopper 5, and a tightening device 11 is mounted on the stopper 5 facing the movable head 6. In this embodiment, the left side of FIG. 1 is the front side and the right side is the rear side, and the movable head 6 is disposed only on the rear side.
A drive chain 8 that is wound endlessly on a sprocket 7 provided on the upper part of the front and rear frames 2 and 2 is stretched along the rail 3. Then, one end of the drive chain 8 is connected to an appropriate position with the front and rear stoppers 31 and 5, respectively, and the drive chain 8 is rotated by a drive machine 9 linked to one sprocket 7 so that the stoppers 31 and 5 The filter plate 4 is moved on the rail 3 to open and close the filter plate 4. The stoppers 31 and 5 simultaneously move symmetrically in the direction of the filter plate 4.

When the plate is closed, the stoppers 31 and 5 are moved to the filter plate 4 side, and the filter plates 4 are sequentially closed. The stock solution is supplied into the filtration chamber formed by the closed filter plates 4 and solid-liquid separation is performed with a filter cloth (not shown).
When the plate is opened, the stoppers 31 and 5 are moved away from the filter plate 4. The filter plates 4..., The filter plate 31, the stopper 31, and the filter plate 4... And the movable head 6 are loosely connected by the filter plate connector 10, and the filter plate 4 at the end is moved in the opening direction. At times, the filter plates 4 are sequentially opened so that a predetermined interval is provided between the filter plates 4 and 4. The front opening plate is provided with a tightening cylinder coupling 12 on the back surface of the movable head 6 to which the tightening device 11 is pressed, so that the tip of the tightening device 11 is defined, and the opening operation of the stopper 5 is performed. The movable head 6 and the filter plate 4 are interlocked with each other. The front end portion of the tightening device 11 is expanded in a flange shape. When the stopper 5 is moved in the opening direction by the drive chain 8, the front end portion of the tightening device 11 is engaged with the tightening cylinder connector 12 and is movable. The head 6 is moved in the opening direction. Further, since the stopper 31 disposed in the front is connected by the stopper 5 and the drive chain 8, each of the stoppers 31 simultaneously moves symmetrically in the direction of the filter plate 4.
After the dehydration is completed, the dehydrated cake separated into solid and liquid by the filter cloth is opened on the filter plate 4 and discharged downward.

FIG. 2 is an enlarged plan view of a main part of the tightening device. A tightening device 11 is mounted on the back surface of the stopper 5 in parallel with the movable head 6. The tightening device 11 is configured by a telescopic pressing device, for example, a cylinder or the like, and a pressing rod 13 penetrates the stopper 5 and presses the tip portion against the back surface of the movable head 6. In this embodiment, an electric cylinder is used as the tightening device 11, but a well-known telescopic tightening device such as a hydraulic cylinder or a pantograph may be used.
When the electric motor 14 placed on the stopper 5 is operated, a ball screw (not shown) of the tightening device 11 rotates and the pressing rod 13 expands and contracts. By adjusting the protruding length of the pressing rod 13, the filter plates 4 are moved back and forth via the movable head 6.
The tightening device 11 mounted on the stopper 5 can appropriately select the number and position of mounting according to the size and quantity of the filter plate 4.

FIG. 3 is a rear view of the stopper provided with the engaging device.
The stopper of the present invention is located at both ends of the filter plate 4 and receives a pressing force (reaction force) in the opening direction from the filter plate 4 during dehydration, and closes the filter plate 4 by a counter force. While maintaining the state, the force is transmitted to the filter press body.
Parts common to the front and rear stoppers 31 and 5 are assigned the same numbers. The engaging device is composed of a lock 15 that is swingably suspended from both shoulders of the stoppers 31 and 5, and an electric cylinder 16 that is connected to the lock 15 and has a rear end pivotally attached to the back of the stoppers 31 and 5. Yes. A square plate-like lock 15 hangs freely from both shoulders of the stoppers 31 and 5, and the piston rod 17 of the electric cylinder 16 pivotally attached to the back of the stoppers 31 and 5 is connected to an intermediate portion of the lock 15. ing. Then, the piston rod 17 is expanded and contracted to rotate the lock 15 to the side surfaces of the stoppers 31 and 5 and to move the stoppers 31 and 5 back to the back by operating the electric cylinder 16. In this embodiment, the tightening device 11 is mounted only on the stopper 5.

FIG. 4 is a plan view of a stopper provided with an engagement device. Rail blocks 18 and 33 are fixedly attached to the rail 3 at a position corresponding to the stoppers 5 and 31 where the filter plates 4 are closed. In order to prevent the stoppers 5 and 31 from being opened, the locks 15 and 32 are rotated to the side surfaces of the stoppers 5 and 31 and inserted into the front surfaces of the rail blocks 18 and 33 as shown by the solid lines in FIG. The rear surfaces of the locks 15 and 32 and the front surfaces of the rail blocks 18 and 33 are engaged, and the stoppers 5 and 31 are prevented from moving backward. When the stoppers 5 and 31 are retracted, the locks 15 and 32 are engaged with the rail blocks 18 and 33 by rotating the locks 15 and 32 to the back of the stoppers 5 and 31 as shown by broken lines in FIG. Is released. The release of engagement here means that the locks 15 and 32 are housed in the back surfaces of the stoppers 5 and 31 so that the stoppers 5 and 31 can be retracted.
Since the stoppers 5 and 31 are symmetrically closed at the same time, the rail blocks 18 and 33 are disposed on the rails 3 corresponding to the stoppers 5 and 31, respectively. Further, the shape of the locks 15 and 32 is not limited as long as the locks 15 and 32 protrude to the rail 3 side and engage with the rail blocks 18 and 33.

FIG. 5 is a rear view of the movable head provided with the engaging device. The movable head of the present invention is a strength member that transmits the pressure from the tightening device 11 to the filter plate when the plate is closed and leads and pulls the filter plate 4 when the plate is opened. A filter bed may be formed on the movable head to form a part of the filter plate 4.
As with the stoppers 5 and 31, the engaging device is a lock 20 that is swingably suspended from both shoulders of the movable head 6, and an electric cylinder 21 that is connected to the lock 20 and has a rear end pivotally attached to the back of the movable head 6. And consists of The piston rod 22 is expanded and contracted to rotate the lock 20 to the side surface of the movable head 6 and to retract the movable head 6 to the back surface by operating the electric cylinder 21.
A rail block 23 is disposed on the rail 3 corresponding to the position where the filter plates 4 are further tightened by the tightening device 11. The locks 20 are rotated and inserted into the front surfaces of the rail blocks 23, respectively. The rear surface of the lock 20 and the front surface of the rail block 23 are engaged to prevent the movable head 6 from retreating. When the movable head 6 is moved along the rail 3, the lock 20 and the rail block 23 are disengaged by rotating the lock 20 to the back of the movable head 6 as shown by the broken line in FIG. 5. . The release of engagement here means storing the lock 20 on the back surface of the movable head 6 so that the movable head 6 can be retracted.
The shape of the lock 20 is not limited as long as it protrudes toward the rail 3 and engages with the rail block 23. In this embodiment, the movable head 6 is disposed only behind the filter plate 4... However, the movable head 6 may be disposed only on the front side or on both sides.

In this embodiment, two stages of rail blocks 18, 18, 33, 33, 23, and 23 are fixed inside the opposing rails 3 and 3 in parallel vertically. The fastening method is not limited to welding, screwing, or the like as long as it can resist the press-fitting / squeezing reaction force from the filter plate 4. In particular, if the entire or a part of the rail block 23 on the movable head 6 side can be replaced, it is possible to cope with fluctuations in the filter cloth, diaphragm compression allowance, and increase / decrease in the filtration chamber during retightening. Further, the rail blocks 18, 33, and 23 can be appropriately selected in shape and number of installation according to the press-fitting / squeezing reaction force from the filter plate 4.

FIG. 6 is a detailed view of the movable rail block. The movable rail block 40 has a case 41 fixed to the rail 3, an adjustment bolt 42 inserted into the case 41 from above or below the case 41, and a case. The inner block 43 includes an inner block 43 that is screwed onto the adjustment bolt 42 and an outer block 44 that is in contact with the inclined surface of the inner block 43 and partially protrudes outside the case 41.
By rotating the adjustment bolt 42, the screwing amount at the tip of the adjustment bolt 42 increases or decreases, and the internal block 43 moves up and down. The outer block 44 protruding from one side of the case 41 opened in the closed plate direction and the inner block 43 that moves up and down inside the case 41 are in slidable contact with each inclined surface. The external block 44 moves back and forth in conjunction with the vertical movement. The adjusting bolt 42 is inserted into one side of the case 41 so as to be slidable and unable to move forward and backward by a known method. Reference numeral 45 denotes an attachment hole for attaching the movable rail block 40 to the rail 3.

When the rail blocks 18, 23, 33 are configured in this way, the protruding length of the external block 44 can be adjusted by adjusting the screwing amount of the adjusting bolt 42, and the rail blocks 18, 23, 33 are inserted into the front surfaces of the rail blocks 18, 23, 33. The gap between the locks 15, 20, 32 and the rear surfaces of the rail blocks 18, 23, 33 can be minimized.

Next, a method for opening and closing the filter press 1 will be described in detail. As shown in the state of the filter press 1 before closing, the locks 15 and 32 of the stoppers 5 and 31 and the lock 20 of the movable head 6 are rail blocks 18, 33 and 23, respectively, as shown by two-dot chain lines in FIGS. It is stored in a position where it does not touch. Further, the distance between the stoppers 5 and 31 and the movable head 6 is in the closest state because the pressing rod 13 is contracted.
In addition, although the Example has described the back stopper 5, the stopper 31 arrange | positioned symmetrically with the filter plate 4 ... connected with the stopper 5 with the drive chain 8 is also operating | moving similarly.

(I)
As shown in FIG. 7A, first, the filter plates 4 of the filter press 1 are closed. Specifically, the drive machine 9 is driven to rotate the drive chain 8, the rear stopper 5 is moved to the filter plate 4 side, and the movable head 6 is pressed through the tightening device 11 to press the filter plate 4. Press in order. At this time, the lock 15 of the stopper 5 and the lock 20 of the movable head 6 are located closer to the filter plate 4 than the rail blocks 18 and 23 disposed on the rail 3. At this time, although not shown, the front stopper 31 is also moved to the filter plate side, and the lock 32 of the stopper 31 is also located on the filter plate 4 side from the rail block 33.

(B)
Next, as shown in FIG. 7B, the electric cylinder 16 disposed on the stopper 5 is operated to rotate the lock 15 to the rail 3 side. Since the lock 15 is located on the closed plate side (front) of the rail block 18, the lock 15 can be easily rotated to the rail 3 without interference between the lock 15 and the rail block 18. At this time, although not shown, the lock 32 of the front stopper 31 is also operated.

(C)
And as shown to Fig.8 (a), the clamping device 11 mounted in the stopper 5 is driven, and the press rod 13 is expanded. The movable head 6 is moved toward the filter plate 4... And the stopper 5 is moved away from the filter plate 4. The lock 15 of the stopper 5 and the rail block 18 come into contact with each other. When the locking device 11 is further driven in a state where the lock 15 of the stopper 5 and the rail block 18 are engaged, the pressing rod 13 extends to move the movable head 6 to the closed plate side (forward) of the filter plate 4. The filter plates 4 are closely tightened with sufficient force to prevent immersion from the filtration chamber. At this time, the interval between the stopper 5 and the movable head 6 is in the most separated state because the pressing rod 13 is extended, and the lock 20 of the movable head 6 is more than the rail block 23 disposed on the rail 3. Located on the closed plate side (front). Although not shown, similarly, the front stopper 31 also moves symmetrically with the rear stopper 5, and the lock 32 of the stopper 31 is engaged with the rail block 33.

(D)
In this state, the stock solution is supplied into the filtration chamber formed between the filter plates 4 and 4. In order to perform solid-liquid separation of the stock solution with the filter cloth of the filtration chamber, the stock solution is press-fitted into the filtration chamber. At that time, a force is generated in the direction of opening the filter plates 4. The reaction force from the filter plates 4 is received by the rail blocks 18 and 33 disposed on the rail 3 via the stoppers 5 and 31.

(E)
After dehydration is completed, the operation switches to the plate opening operation. First, as shown in FIG. 8B, the electric cylinder 21 provided in the movable head 6 is operated to rotate the lock 20 to the rail 3 side. Since the lock 20 is located on the closed plate side (front) of the rail block 23, the lock 20 can be easily rotated to the rail 3 without interference between the lock 20 and the rail block 23.

(F)
Next, as shown in FIG. 9A, the pressing rod 13 of the fastening device 11 mounted on the stopper 5 is contracted. Since the stopper 5 is heavier than the movable head 6 and also has resistance of the drive chain 8, first, the movable head 6 moves to the open plate side (rear) and contacts the rail block 23 provided on the rail 3. If the pressing rod 13 continues to contract while the lock 20 of the movable head 6 and the rail block 23 are engaged, the retractable movement of the movable head 6 is prevented. Start moving. When the well-known technique detects that the stoppers 5 and 31 have moved by a predetermined amount of movement, the contraction operation of the tightening device 11 is stopped.

(G)
Then, as shown in FIG. 9B, the pressing rod 13 of the tightening device 11 mounted on the stopper 5 is extended. Since the stopper 5 is heavier than the movable head 6 and also has resistance (brake) of the drive chain 8, the movable head 6 moves to the closed plate side (front), and the abutting lock 20 and the rail block 23 are separated from each other. . When the well-known technique detects that the movable head 6 has advanced by a predetermined amount of movement, the extension operation of the tightening device 11 is stopped. At this time, the locks 15 and 32 of the stoppers 5 and 31 and the lock 20 of the movable head 6 are separated from the rail blocks 18, 33 and 23, respectively.

(Chi)
After separating the locks 15, 32, 20 and the rail blocks 18, 33, 23, the electric cylinder 16 of the stoppers 5, 31 and the electric cylinder 21 of the movable head 6 are operated as shown in FIG. Then, the locks 15, 32, and 20 are rotated and released. At this time, the locks 15, 32, and 20 are stored in positions that do not contact the rail blocks 18, 33, and 23, respectively.

(Li)
When the locks 15, 32, and 20 are released, as shown in FIG. 10 (b), the pressing rod 13 of the fastening device 11 mounted on the stopper 5 is contracted to move the movable head 6 to the opening plate side (rear). Move. When it is detected that the movable head 6 is closest to the stopper 5, the contraction of the tightening device 11 is stopped. At this time, the state is the same as (a).

(Nu)
Thereafter, the drive chain 8 is operated to move the stoppers 5 and 31 in the plate opening direction. The movable head 6 is moved to the opening plate side (rear) through the pressing rod 13 to sequentially open the filter plates 4. The dehydrated cake that is fixed to the filter cloth at the same time as the plate is peeled off from the opened filter cloth and falls downward.

In this embodiment, the movable head is disposed at one end (rear side) of the filter plate, but may be disposed at both ends of the filter plate. In that case, a tightening device is mounted on the stopper (front) on which the movable head is newly disposed, and the operations described in FIGS. 7 to 10 are performed simultaneously and symmetrically.

The method of opening a filter press according to the present invention is a device in which a member is inserted in the direction of the opening and closing plate after the filter plate is closed and the reaction force (back pressure) from the filter plate is received by the filter press body. Is easily released. There is no damage to the engaging device at the time of release, which can contribute to running costs.
Since the filter plate is opened and closed by a slidable fastening device base having a lock mechanism, the total length of the filter press can be shortened and a large installation area is not required. In addition, at the time of renewal, it is possible to increase the number of filtration chambers with the same installation area. In particular, the present invention can be effectively applied to a filter press in which a filter plate is disposed at both ends and a filter plate is opened and closed from the front and rear.

DESCRIPTION OF SYMBOLS 1 Filter press 2 Frame 3 Rail 4 Filter plate 5, 31 Stopper 6 Movable head 11 Tightening device 15, 20, 32 Lock 16, 21 Electric cylinder 17, 22 Piston rod 18, 23, 33 Rail block 40 Movable rail block 41 Case 42 Adjustment bolt 43 Internal block 44 External block

Claims (4)

A movable head (6) provided with stoppers (5, 31) for opening and closing the filter plate (4 ...) on both sides of the filter plate (4 ...) and juxtaposed on one or both ends of the filter plate (4 ...) The fastening device (11) mounted on the stopper (5) is connected, and after closing the plate, the stopper plate (5, 31) is engaged with the rail (3) with the filter plate (4. In the filter press
The stoppers (5, 31) and the movable head (6) are provided with locks (15, 32, 20) that engage with the rail (3) to prevent retraction,
After the dehydration, the movable head (6) is engaged with the rail (3),
After tightening the clamping device (11) and moving the stopper (5, 31) to the filter plate (4 ...) side,
Extend the clamping device (11) and move the movable head (6) to the filter plate (4 ...) side,
The lock (15, 32, 20) is released and the opening of the filter plate (4 ...) is started with the stopper (5, 31) and the movable head (6) and the rail (3) engaged with each other. A method of opening a filter press characterized by the above. A lock (15) hangs down on both shoulders of the stopper (5), and a piston rod (17) of an electric cylinder (16) pivotally attached to the back of the stopper (5) is connected to the lock (15). The engagement device is configured, the lock (15) is rotated to the side surface of the stopper (5), and the lock (15) is engaged with the rail block (18) fixed to the rail (3). 2. The method of opening a filter press according to claim 1, wherein the tightening device (11) is extended to depress the movable head (6) for dewatering. A lock (20) is suspended from both shoulders of the movable head (6) in a swingable manner, and the piston rod (22) of the electric cylinder (21) pivotally attached to the back of the movable head (6) is locked to the lock (20). Connected to form an engaging device, and the lock (20) was rotated to the side of the movable head (6) to engage the lock (20) with the rail block (23) fixed to the rail (3). 3. The filter press according to claim 1, wherein in the state, the tightening device (11) is contracted to advance the stopper (5) to separate the lock (15) from the rail block (18). Opening method. A case (41) for fixing each rail block (18, 23, 33) engaged with the lock (15, 20, 32) to the rail (3) and a case (from above or below the case (41)) 41) an adjustment bolt (42) inserted into the interior of the case, an internal block (43) having an inclined surface on the side of the filter plate (4) screwed to the adjustment bolt (42) inside the case (41), and an internal block The movable rail block (40) is constituted by an external block (44) that is in contact with the inclined surface of (43) and partially protrudes outside the case (41), and is internally formed by the screwing amount of the adjusting bolt (42). The block (43) is moved up and down to adjust the protruding length of the external block (44) so that the engagement position with the lock (15, 20, 32) can be adjusted in the direction of the opening and closing plate. Any one of 1 to 3 Kaihan way of a filter press according to.

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