JPS5962316A - Filter press - Google Patents

Abstract

PURPOSE:To clamp respective filter plates at high pressure, by making a pair of blocking heads perform each closing action simultaneously at different speeds, and providing a mechanism for preventing the retreat of the locking head at one side. CONSTITUTION:In a state that respective filter plates 5 are opened and a connecting device 8 is engaged with a pin 25 of a locking head 1, a hydraulic head 30 is operated to extend so as to press a locking head 2. A pair of locking heads 1, 2 are respectively advanced by a wire rope simultaneously in opposite directions at a speed ratio of 2 to 1, and each opening between the filter plates 5 is closed in sequence from both end openings. Thus the openings between respective filter plates are closed in a short time. Further, a pair of stoppers 32 are provided to the back face of the head 1, and are advanced by the extension of the cylinder 30 to the position, where they almost come into contact with the inner surfaces of a pair of guide rails 13, to block the retreat of the head 1 at the advanced position where respective plates 5 are closed.

Description

Detailed Description of the Invention: On a pair of parallel guide rails supported by a machine frame, a large number of parallel rows of filter plates are disposed sandwiched between a pair of heads. In between, each It& is connected by a loose connecting means so that each filter plate can be opened and closed at the same time, and the filtration operation is performed with each filter plate closed, and each filter plate is opened. A filter cloth in which the cake is discharged by running a filter cloth in the filtered state is known, for example, from Japanese Patent Publication No. 51-43909.

In such a filter press, when the filter plates, which are opened and closed all at once like an accordion, are closed, the stock solution to be subjected to &R is sent under high pressure and subjected to a temporary operation. ? ! In the case of a filter press equipped with a filter plate diaphragm, the diaphragm is further pressurized, so the space between each filter plate disposed between the pair of tightening heads is When the gap is closed, it must be kept tightly tightened to withstand the high pressure mentioned above.

In addition, in such a filter Gres, its filtration.

In order to increase the filter area, it is required to increase the number of filter plates.

Therefore, such a filter press has the following problems.

If you increase the number of filter plates to increase the back area,
The stroke of the hydraulic cylinder for opening/closing and tightening between the filter plates arranged in parallel on a pair of guide rails has become too long and takes up too much space. In order to prevent this from occurring, its diameter and weight must also be increased, making it extremely costly.

Jikko 1485 solves this problem.
Like the filter press shown in Publication No. 6-336.19, a pair of tightening heads are configured to be movable, and a hydraulic cylinder is disposed between one of the tightening heads and the machine frame. , a removable locking device is provided between the other tightening head and the machine frame or the guide rod to lock the tightening head in a predetermined position on the guide rod in a non-returnable manner. However, in this filter press, the means for opening and closing between each filter plate in an accordion-like manner includes one tightening head for opening and closing between each filter plate over the entire opening and closing section; A means for tightening the closed lip between each filter plate at high pressure is provided by a hydraulic cylinder disposed on the other tightening head. Although the stroke of the hydraulic cylinder can be made extremely small, the time required for this type of filter press to open and close all the filter plates is The above-mentioned Japanese Patent Publication No. 51, in which the head is fixed to the support frame of the guide rod, and only the other tightening head is movable.
Similar to the type of filter press shown in Publication No. 43909, the filter press is long because it opens and closes the rows of filter plates sequentially only from the - side by moving one movable tightening head forward and backward. In these filter presses, the more the number of filter plates is increased in order to increase the filtration area, the more time required to open and close between each filter plate, that is, the so-called time that does not participate in the filtration operation is reduced. There was a problem in that the rough cycle time increased and the filtration efficiency decreased on the contrary.

In order to solve the above-mentioned problems, this invention aims to halve the miscellaneous cyclic time required for opening and closing between each wall plate, and increases the number of filter plates. The filter press can be used to increase the filtering efficiency, and the high-pressure tightening between the filter plates in 1) increases the number of filter plates without increasing the length of the means. The filter press according to the present invention includes a pair of tightening heads (+1 (21) and a pair of tightening heads (+1 (21) and (11(2) in a filter press in which a number of filter plates positioned between the two are each supported movably along the longitudinal direction of the rail, 1) the pair of tightening heads (1); (2) and each of the filter plates arranged in between is connected via a loose connection means so as to be openable and closable; 11. The pair of tightening heads [1H2i, In both the forward direction, in which the open right side is closed sequentially from both ends, and the backward direction, in which the closed state between each filter plate is opened sequentially from both ends,
A simultaneous advance/retreat drive device for moving them back and forth almost simultaneously is provided;+n The advance/retreat speed of one tightening head +1+ in the above simultaneous advance/retreat sliding device position is higher than the advance/retreat speed of the other tightening head (2). iv - The force control head (l) shall be provided with a removable locking device for locking it in a predetermined forward position irreversibly. , ■ A tightening device is installed between the other tightening head (2) and the machine frame to which the pair of guide rails are connected, for further tightening the gaps between the filter plates when the gaps between the filter plates are closed. This filter press is characterized by:

To explain one embodiment with reference to Figs. 1 to 6, a pair of parallel guide rails (1) are connected by a pair of machine frames (QI)
3) θ3) is supported horizontally, and between this pair of guide rails (layer (13), a pair of tightening heads (1
) (2) and a row of a number of filter plates (5) (5) positioned between the pair of tightening heads (1) (21), each tightening head tl) (21 is each wheel・15) (lllrl --161<+ 61-
The filter plates 15) + 5) are supported on the guide rail Q 31 and are movable along the longitudinal direction of the guide rail (13), and each filter plate 15) + 5) -- is supported on the guide rail Q 31 through the ,
It is supported on the guide rail Q 3) I) 3) via the k (1?) that protrudes on both sides of the filter plate (5), and is movable along the longitudinal direction of the guide rail 03). However, a pair of tightening heads (1) and (2) and a number of filter plates i5)+5)-m- positioned between them each have a looseness similar to II:+1 in the known filter press. A connecting means, for example, a link (18J (18) ---109) having a loose connecting hole (elongated hole) that interlocks each filter plate +5) (5+ ---1 in the front and back direction at the upper and lower positions on both sides thereof, respectively. (19) ----, a number of filter plates (5) connected and located between a pair of dispensing heads f1)+21
1+51--1 row, from the closed state shown in FIG. , the interval α between each filter plate (5) (5+--1) is sequentially closed from both ends, and the interval α between each filter plate (5) (51--1) is closed sequentially from both ends. are all closed, as shown in FIG. 2. Conversely, when the pair of tightening heads t1)+2) at both ends are moved away from each other from the closed state shown in FIG. Board (5) (5) - All of you should be in the open position as shown in Figure 1.

In this way, in the filter press of the present invention, each filter plate (5) + 5) - 1 space is placed at both ends of the filter plate row.
By simultaneously advancing and retracting a pair of tightening heads tlJ (2+), it is possible to simultaneously open and close a large number of filter plates [51+51--] sequentially starting from the ones at both ends. The tightening head t1) (2) is provided with the following simultaneous forward/backward driving device in order to move it forward and backward almost simultaneously in both forward and backward directions.

That is, the simultaneous advance/retreat WjA movable box of this embodiment includes a hydraulic cylinder (roller) disposed on the machine frame α between 1 and the tightening head (2), and a pair of tightening heads f1) (2+ and filter plates (6), (5)-m- between them, and the following tightening heads t+) (2+ interlocking coupling devices (21, ll and The interlocking coupling device (1) of this embodiment is configured with a pair of said machine frames (11).
) (12) At the appropriate places on both sides of the
(2J) Pulley addressed to the pair a (24 (B), pivoted in place on the tightening head (2)) Pulley 2υ (3) addressed to the pair a, and a pair of feeding heads +1) (2) and filter plates [5) +5+-- between them, and one end of each is fixed on one machine frame (11) (6).
The suspension is then sequentially turned around the pulleys (211 (22) (23) (24) 7J, and the other end is fixed on the machine frame 0 of the capacity (7
) A pair of wire ropes (10) are connected to each other, and the wire ropes (10) are connected to the above-mentioned pulley. It is configured with a pair of connecting devices (8) that are connected to.

Next, the coupling device (8) of the embodiment will be explained. As shown in detail in FIG. It is composed of an engaging alloy (9), a bottle 0 protruding from a suitable position on the tightening head (1), and a cam holder protruding from a suitable position on the guide rail (13). The thread alloy (9) has an engagement recess τ in which the pink uniform engages.
), and between the engagement recesses, the 0 leg (9) with a trochanteric state, and the engagement Matching recess (right direction in Figure 6 for 2 forces (rearward position in the forward/backward direction of the tightening head +1+)
A cam slope (9)b is formed in the upper right direction in the figure, and the cam (26) has a chevron-shaped cam surface L26)a(2).
f3) b formed and wire rope (lO)
rotates and the leg (9)a of the engaging alloy (9) is rotated by the cam 6)
When approaching the bottle ■ position from the top left in Fig. 6 at a position where it does not act on the pin, the cam surface (9)b acts on the pin spit and the engaging metal object (9) is automatically lifted up. , the engagement recesses engage the pin υ from above, and the tightening head (1) is moved backward to the upper left in FIG. 6 by the wire rope (10), and from this state the wire rope (10) rotates in the opposite direction, the tightening head is moved forward in the upper left direction in FIG. When a reaches the cam (second working position), the leg (9) a acts on the cam surface 12B and engages the engaging metal (9).
) rises and the engaging recess force is released from the bottle handle, so at this time, the tightening head fl)l'l: is separated from the wire rope (10) and the wire rope (l
O) can move the engagement alloy (9) further to the left in FIG. 6.

The tightening head (1), which is removably connected to the wire rope (10) with the removable connecting device (8) configured as described above, is connected to both cotton-tipped heads [+] (21 together). In the open state shown in FIG. 1 in which the plate is retracted, if the engagement alloy (9) is engaged with the bottle, the hydraulic cylinder (301
When the tightening head (2) is advanced or retreated by expanding and contracting the A wire rope with a boosting mechanism that focuses on the position of object (9) (
Since the machine frame (+1) (+21) is connected to the machine frame (+1) (+21) by lO), at the same time as the tightening head (2) moves forward and backward, the dispensing head +1) moves twice as much as the tightening head (2), and each Filter plates (505) - partially or simultaneously, the filter plates at both ends are made to close or open sequentially, and the tightening head (2)
/3 between the filter plates is opened and closed, and the tightening head (1)
/3 filter plates will be opened and closed.

In addition, each of the above-mentioned filter plates t[
(5+ -- In some cases, a filter cloth device similar to that in a known fully open/close type filter press is used, for example, for each filter plate in the open state (5H51 -- In some cases, the filter cloth device is moved all at once to discharge and filter the bouquet. A filter cloth device (not shown) capable of cleaning cloth, etc. is provided.

In the filter press of the present invention, each filter plate (5H6) -- one tightening head +1) brought to a partially closed forward position is moved forward and backward by the simultaneous forward and backward drive device as described above. The following releasable locking device is provided to lock the vehicle in a non-retractable manner at the position. In other words, a pair of guide rails (1 (to) (at the appropriate place of 1 (to), a locking protrusion a) facing inward) 0υ are placed above and below 2
There are locking protrusions on both sides 01)G31)・
61) A pair of stoppers 0'4 (2) that can be engaged and disengaged from 0→ are located on the back surface (1) a of the tightening head (1).
The back Fj (1) a through the support fitting 81
A pair of parallel rods (B), which are disposed and supported horizontally and parallel to , have holes (7) (to) (to) through which ``)j1'' can pass, and the pair of stoppers ( (to) ■ is supported by the above pair of parallel bars (b) through ) (to) (to) (to) in the hole, and is connected to the guide rail Q.
3) Q It is constructed so that it can move forward and backward in the direction of approaching or moving away from it, but the space between this pair of stokes is located at the rear surface (1) of the tightening head (1).
A hydraulic cylinder (g) supported by 1a is connected via a bracket @(a) connected to each end of this hydraulic cylinder (to), and when the hydraulic cylinder (1) is reduced, a pair of The stopper ■ (the distance between ψ is reduced and is kept at the position shown by the solid line in Figure 3, and the hydraulic cylinder (t)
When extended, these pair of stoppers @ (c) respectively become a pair of guide rails Q 3! (111 on both sides of the top of Fig. 3 until it almost touches each inner surface of + (6)
The filter plates (5) [) can be moved forward and prevented from retracting in the partially closed advanced position of the tightening head f1). That is, the pair of stoppers (A) and (A) move the tightening head +1) forward while keeping them in the retracted position shown in FIG. 5) +5) -- In the partially closed state, when brought to the forward position (dashed line in Figure 3) where the distance between them is expanded to β2, as shown in Figure 4, the rear surface (6) b The locking protrusion 01)('
31) - engage each front surface of the
2) Connect a to each rear side of the engaging protrusions (1 (g), (c), (g), (to)) protruding from both sides of the dispensing head (1), respectively.
a■a --- by tightening the tightening head (tl), each filter plate (5) (5) --- can be locked in the forward position where it is closed and cannot be retracted. There is. Of course, this gate-like window can be released by retracting the pair of stoppers t (34) and reducing the distance between them to β1 (solid line in Figure 3).

Furthermore, in Fig. 3, sign (to) is a blocking plate that prevents the pair of stoppers 64 (2) from moving back to a certain position, Ω0 is a receiving plate that supports the weight of stopper S, and CQ is a liquid passageway. In Figures 1 and 2, (6) is a flexible stock solution supply pipe.

In addition, in the filter press of the present invention, each filter plate [5
) (fi) -- One of the tightening heads (1), partially closed and brought to the forward position, is irrevocably locked in the stopper as described above by (a). Later on, acting on the other clamping head (2) brought into the advanced position, it is moved further forward, so that each filter plate (
fil (51--A tightening device is provided for tightening the filter even more strongly in the partially closed state, but this tightening device is not included in the filter press of this embodiment. is composed of a specified hydraulic cylinder (30) disposed between the tightening head (2) and the machine frame (12).In other words, this hydraulic cylinder (3+)) has the above-mentioned tightening device, It also serves as a part of the simultaneous forward and backward drive device for the pair of tightening heads, and for this purpose, the pair of tightening heads (11(2)) are brought into the closed state by the simultaneous forward and backward drive device (11(2)). In a state in which one of the tightening heads (1) is locked so as not to be retractable, the tightening head (1) is interlocked and connected to the tightening head (1) via the wire rope (10) of the simultaneous advance/retreat drive device. The other tightening head (2)
Furthermore, in order to be able to move forward by the extension operation of the hydraulic cylinder (30), the wire rope (101) constituting the simultaneous advance/retreat drive device of this embodiment and the tightening head (1) are connected as described above. The locking metal member (9) is connected to the locking member (9) through the pin 4, and the joint state of both (9) is ensured by the tightening head (1 being the stopper (to) of the locking device). When the locking protrusion 0◇ is advanced to a position where it can be engaged, the leg (9)a of the locking metal member (9) is released when it acts on the cam stop.

In this manner, when the engaging alloy (9) is released from the pin □□□, when the hydraulic cylinder (30) is further extended, the tightening head (2) is advanced and the closed state is reached. Each filter ff1al (5) -- a part can be further tightened (retightened) between the tightening head (1) whose retreat is prevented by the stopper trowel, and at that time, the above-mentioned The alloy (9) further advances in the direction away from the pin. On the other hand, when the hydraulic cylinder is contracted, the tightening head (2) moves backward, and the cam slope (9)b of the engagement alloy (9) acts on the pin (to), causing the engagement alloy (9) to move backward. ) will automatically engage with the pin (25), so if you remove the stopper trowel, the tightening head +1
1 moves back from this point in conjunction with the tightening head (2) at twice the speed of the tightening head (2).

Next, to explain the function, in the filter press of this invention, each filter plate t505) -
- The tightening heads f1) (2) at both ends of the barrel, which partly opens and closes like an accordion, are both guide rails θ3) θ(
The pair of tightening heads (1) and (2) are connected by a simultaneous forward and backward drive device, and each filter plate (5)
+5) --The part is made to move forward and backward at almost the same time in both the forward direction in which the intermediate glaze is closed sequentially from both ends, and the backward direction in which the closed state is opened sequentially from both ends, and the above-mentioned simultaneous forward and backward movement is possible. When the drive device is driven, that is, in the case of the above embodiment, each filter plate (
5) (51--When the hydraulic cylinder is extended in the partially opened state, the pair of tightening heads (1) (2)
) are simultaneously advanced at a speed of 2:1, and the spaces between each filter plate (5) + 5) are sequentially closed starting from the two extremes, so that the left 1/ Filter plate group and right 2
/3 filter plates gather from the left and right to the center almost simultaneously, and each filter plate (5) 45) - all are closed (Second Section I
).

When the hydraulic cylinder (30) is contracted from this closed position, the pair of tightening heads (1) (2+) are simultaneously retracted at a speed of 2:1, and each filter plate (51 (5)
) - Everyone opens Bl@ next from both ends, and the filter plate group on the left 1/3 and the filter plate group on the right 2/3 of the ball in Figure 2 are moved horizontally at the same time. and each filter plate (5051
- Gather all together (Figure 1).

Therefore, in the filter press of the present invention configured as described above, the time required to open and close some of the filter plates t5H5) is shorter than that of the conventional method, when one of the tightening heads is fixed or stationary. Compared to a filter press of the type that opens and closes between each filter plate by moving only the other tightening head back and forth, about 3/3 of that amount is sufficient.

Furthermore, the device of the present invention has one of the tightening heads (11) connected to each of the above-mentioned filter plates (5), which can be engaged and disengaged so that the tightening head (1) can be stopped irreversibly in the closed state. Since a freely movable locking device is provided, the locking device is actuated on the tying head (+), that is, in the above embodiment, the stopper is actuated on the tightening head (1). The other dispensing head (2) is held in a predetermined forward position with respect to the guide rail 113) and cannot be moved back.
If a tightening device is applied to each filter plate [5if5] to further tighten a part, that is, in the case of the above embodiment, if the hydraulic cylinder is further extended, a pair of Part of each 11f (5) + 5+ -- which is closed between heads (1) and (2), is strongly tightened and the stock solution is forced into between each filter plate to perform the filtration operation. The resulting cake inside the filter plate can be further compressed under high pressure using a diaphragm, etc.
In the case of this embodiment, each filter plate was opened and closed by a hydraulic cylinder having a stroke of only about 1/3 of the total opening/closing stroke between each filter and plate. Moreover, it can be further tightened with even higher pressure.

Next, another embodiment of the filter press according to the present invention will be explained. In the above embodiment, the ends of the wire rope (1O) are fixed to the front and rear machine frames (II) (+2), respectively. 6) and (7), but in other embodiments, the end of this wire rope (lO) may be placed at an appropriate position on the guide rail 09, which is a fixed body.

Further, in the above embodiment, the interlocking connection device 1 (li) between the pair of tightening heads +1) (21) is connected to the pair of movable pulleys (21) and the pair of fixed pulleys I2'4 (23), and the suspension rotates between them. Although the example is shown in which the interlocking wire rope (10) etc.
This can also be implemented by changing it as follows.

That is, if the outline is explained with reference to Figures 7 and 8,
A pair of sprocket wheels (4) are placed in front and behind each other on the guide rail (1 line), and a pair of sprocket wheels (c) are pivoted on the guide rail (4) between them, and the latter The same sprocket wheel (c) is interlocked and connected to the sprocket wheel (c) through interlocking gears 0η (c) with different numbers of teeth meshed with each other, and the sprocket wheel is interlocked with the
) In the dark, turn each endless chain and ring, and tighten each chain o1 (7), respectively with a tightening head +1).
In (2), either one may be fixedly connected and the other may be connected via the above-mentioned detachable connecting device (8), and the above-mentioned interlocking gear [phase]? ) (Foundation), when the gear ratio is set to 1=2, this interlocking connection device also connects the tightening head (1) to the tightening head (2) in the same manner as described above.
) can be moved forward and backward at twice the speed of
The space between each filter plate can be further tightened in the closed state.

Furthermore, in each of the above embodiments, a tightening device is used as a retightening device between each filter plate in a state where the gap between each filter plate is closed by a simultaneous advance and retreat drive device of a pair of tightening heads 1ll (2). , an example has been shown in which the hydraulic cylinder (30) is arranged between the tightening head (2) and the machine frame (l), but in other embodiments, each of the above embodiments can be used. The hydraulic cylinder in may be replaced by a screw jack (not shown) (and in the above embodiment h, the tightening head +1) is engaged in a predetermined forward position in a non-retractable manner. A locking device for locking the guide rails (13) is provided with a protrusion Oυ protruding from each inner surface of the pair of guide rails (13)H,
Although an example in which the locking device is configured with a movable stopper that can be freely engaged and detached is shown, this locking device is not limited to the above embodiment, and other embodiments may be used.
Of course, this may be replaced with a locking device already known in Japanese Utility Model Publication No. 56-33619.

The present invention has been described above with reference to several embodiments, but as mentioned above, the filter press of the present invention includes a pair of tightening heads m (21 and a number of filter plates (5) + 5 located between them) - -- are both movably supported in the longitudinal direction of a pair of guide rails, and are connected to each other via a loose connection means so as to be openable and closable. In the filter press of the present invention, the pair of tightening heads (II2) have a forward direction that sequentially closes the open state between each filter plate from both ends, and a backward direction that sequentially opens the closed state between each filter plate from both ends. At least, a simultaneous advance/retreat drive device is disposed for moving the filter plates almost simultaneously in both directions. When opening between each filter plate, the opening operation can be performed simultaneously from both ends in the direction away from the middle of the row of filter plates, and the opening/closing speed is the same as that of one Since the forward/backward speed of the tightening head (t1+) is set to be faster than the forward/backward speed of the other tightening head (2), the time required for this opening/closing operation is the same as that of the filter plate row between each filter plate. Compared to a conventional filter press that opens and closes only from one end, less than half the filter plate rows of the same length are required, and the filter plate rows are almost twice as long in the same amount of time. You will be able to open and close the columns. therefore,
In the filter press according to the present invention, the rough cycle time required for opening and closing the filter plate can be reduced accordingly, and the filtration efficiency can be relatively improved.

Further, in the filter press of the present invention, the space between each filter plate is closed at a position where the pair of tightening heads t1)+2+ are moved a predetermined amount in a direction toward each other,
The means for tightening each filter plate with high pressure in the open state of each filter plate 1f #l is a detachable means that can lock one of the tightening rods (1) irreversibly in the above-mentioned forward position. Since it is composed of a locking device and a tightening device disposed between the other tightening head (2) and the machine frame, according to the present invention, the stroke of this tightening device is Compared to the conventional device in which the tightening device between the filter plates moves only one of the tightening heads back and forth to open and close between each filter plate, the tightening head (
+) can be reduced by the stroke that is moved forward and backward. In other words, compared to the conventional device as mentioned above,
Since the stroke of the high-pressure tightening device can be shortened by at least the opening/closing stroke of all the filter plates 2, it is possible to tighten more than twice the number of filters and plates with the same stroke using the high-pressure tightening device. It is something that can be done.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the filter press according to the present invention, and FIG. Figure 3 is a rear view of the tightening head (the cross section is along the line ■-■ in Figure 2),
The figure is the same side view (the cross section is along the IV-ff line in Figure 3)
, Figure 5 is a perspective view showing the interlocking connection device between a pair of tightening hands. 51〆'', Figure 6 is a side view of the connecting device between the wire lobe and the tightening hend, Figure 7 is a side view of a filter press showing the outline of another embodiment, and Figure 8 is a partially cutaway plan view of the same. It is. [) (2)... Tightening head, (5)... Filter plate,
(8)...Connection device that can be freely engaged and detached, (10)...Wire rope, (River (12)...
Machine frame, 1131...Guide rail, (l→(19)・
...Link, 121! (2Zi and 1!(24)--pulley, (2)])...hydraulic cylinder (tightening device), 61
)...locking protrusion, 4...stopper. Patent applicant: Daikeito Ishigaki Kiko Co., Ltd. (6370) Patent attorney: Takemi Nishimura Figure 3 ■ Figure 4

Claims (1)

[Scope of Claims] 1. Located between a pair of tightening heads +1)+2+ and this pair of tightening heads tl)(2) on a pair of parallel guide rails supported by a machine frame. In the filter press, in which a plurality of filter plates are respectively supported movably along the longitudinal direction of the rails, 1. The pair of tightening heads (1) +2+ and the filter plate located between the pair of tightening heads (1) +2+ are provided. 11. The pair of tightening heads (tl>t2) are provided with a forward direction that sequentially closes the open state between each filter plate from both ends, and a direction that sequentially closes the open state between each filter plate from both ends. 11. A simultaneous forward/backward drive device is provided for moving the plates almost simultaneously forward and backward in both directions, including a backward direction in which the closed state between the plates is opened sequentially from both ends.11. ) is set to a higher speed than that of the other tightening head (2), and it is locked to one tightening head (1) in a predetermined forward position in a manner that it cannot be moved back. ■ A removable locking device is provided between each filter plate between the other tightening head (2) and the machine frame to which the pair of guide rails are connected. A filter press characterized in that a tightening device is provided to further tighten the space between each filter plate in the closed state. 2. The simultaneous forward and backward drive device includes a hydraulic sill disposed between the machine frame to which the pair of guide rails are connected and the other tightening head (2), and a pair of tightening heads fl)
42) A filter press as claimed in claim 1, comprising an interlocking connection device between 42) and 42). 8. The filter 7less according to claim 2, wherein the hydraulic seal is also a tightening device between the filter plates in a state in which the filter plates are closed. 4. The simultaneous forward and backward drive device includes a screw jack disposed between the machine frame to which the pair of guide rails are connected and the other tightening head (2), and a pair of tightening heads fl. ) +2+. 5. The filter press according to claim 3, wherein the screw jack is also a tightening device between the filter plates in a state in which the filter plates are closed. 6. A pair of tightening heads iJ (the interlocking connection device between 1121 is connected to each tightening head i1 on the guide rail) +
2+ or between a pair of guide rails, each tightening head 1ll (21) is pivoted at an appropriate position on a pair of machine frames (11) (12) connected at a rearward position. a pair of pulleys (227 (23)) and a pair of pulleys (21) pivotally supported at appropriate positions on the other tightening head (2);
) (□□□, a pair of tightening heads it)+2+, and a filter plate between them. A pair of wire ropes are fixed to the pulley (21i (22 (support) bar 24), and the other end is fixed to the other machine frame (1'41). The scope of the present invention is comprised of a pair of connecting devices that removably connect a proper position of the part where the suspension is passed between the two pulleys (23) to the one of the tightening heads. The filter press according to any one of Items 2 to 5. 7. An interlocking connection device between the pair of tightening heads f1++2+ is disposed on the left and right guide rails, respectively, and the shaft is mounted at an appropriate position on the guide rail. Two supported pairs of sprocket wheels, one pair of endless chains each suspended between six pairs of sprocket wheels, an interlocking connection device between six pairs of endless chains, and six pairs of endless chains. It is comprised of a connecting device that connects appropriate positions of one of the endless chains to the one dispensing device, and a connecting device that connects appropriate positions of the other endless chain to the other tightening device, respectively,
The filter press according to any one of claims 2 to 5, wherein one of the coupling devices is a detachable coupling device and the other is a non-releasable coupling device. 8. The locking device of the tightening head (tl) is provided with a protrusion protruding from each side surface of the pair of guide rails at a proper position, and a locking device of the tightening head (1) at a proper position, in a direction that intersects with the side surface of the guide rail. The filter according to any one of claims 1 to 7, comprising a pair of movable stoppers provided so as to be freely advanced and retractable, and a device for advancing and retracting the pair of movable stoppers. press.