JPH0211284B2 - - Google Patents

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 arranged sandwiched between a pair of heads. Between the heads, each filter plate 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. The cake is discharged by running the filter cloth while the gap is open.
A filter press is known, for example, from Japanese Patent Publication No. 43909/1983.

In the case of 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 filtered is fed under high pressure to perform the filtration operation. In the case of a filter press equipped with a diaphragm on the surface for compressing cake, the diaphragm is further pressurized, so the space between each filter plate disposed between the pair of clamping heads is closed. In such a condition, it must be kept tightly tightened so that it can withstand the high pressure mentioned above.

Further, in such a filter press, in order to widen its filtration area, it is required to increase the number of filter plates.

Therefore, in such a filter press,
I had the following problem:

If the number of filter plates is increased in order to increase the filtration area, the stroke of the hydraulic cylinder for opening, closing, and tightening the filter plates arranged in parallel on a pair of guide rails will become longer, taking up too much space. In order to prevent buckling of the piston rod with this elongated stroke, its diameter and weight must also be increased, making it extremely costly.

To solve this problem, a filter press shown in Japanese Utility Model Publication No. 56-33619 has a pair of movable clamping heads, and one clamping head is connected to the machine frame. A hydraulic cylinder is disposed between the other tightening head and the machine frame or the guide rod, and a lock 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 irreversibly. Some filter presses are equipped with a removable locking device, but in this filter press, the means for opening and closing between each filter plate in an accordion-like manner opens and closes between each filter plate over the entire opening and closing section. The filter plate consists of one tightening head and its driving means arranged in the tightening head, and the means for tightening the gap between each filter plate under high pressure in the closed state is connected to the other tightening head. Although the stroke of the hydraulic cylinder can be extremely reduced, the time required for this type of filter press to open and close all the filter plates is Note that there is a filter press of the type shown in the above-mentioned Japanese Patent Publication No. 51-43909, in which one clamping head is a fixed head fixed to the support frame of the guide rod, and only the other clamping head is movable. Similarly, these filter presses are long because the rows of filter plates are sequentially opened and closed from one side only by the forward and backward movement of one movable tightening head. The more you increase the number of filter plates to increase the filtration area, the more time it takes to open and close between each filter plate.
That is, there was a problem in that the so-called miscellaneous cycle time, which is not involved in the filtration operation, increased and the filtration efficiency was reduced.

In order to solve the above-mentioned problems, the present invention aims to halve the rough cycle time required for opening and closing between each filter plate, and improves filtration efficiency by increasing the number of filter plates. It is an object of the present invention to provide a filter press capable of increasing the number of filter plates without increasing the length of high-pressure tightening means between the filter plates in a closed state, the filter press according to the present invention. The machine consists of a pair of clamping heads 1, 2 and a number of filter plates positioned between the pair of clamping heads 1, 2 on a pair of parallel guide rails supported by a machine frame. , respectively, in a filter press supported movably along the longitudinal direction of the rail, a loose connection means is provided between each of the pair of tightening heads 1 and 2 and the filter plate positioned therebetween. The pair of tightening heads 1 and 2 are connected in a forward direction to sequentially close the open state between each filter plate from both ends, and in a forward direction to sequentially open the closed state between each filter plate from both ends. A simultaneous drive device is disposed for moving the tightening head 2 forward and backward almost simultaneously in both the retraction direction, and the tightening head 2 is supported at least substantially on the pair of guide rails behind the tightening head 2. A movable beam 3 is provided, and the movable beam 3 and the tightening head 2 are connected via a loose connection means so that the distance between them can be increased or decreased within a certain range. That is, both the tightening head 1 and the movable beam 3,
A removable locking device is provided for locking them in a predetermined forward position in a manner that they cannot be retracted. Between the tightening head 2 and the movable beam 3, a locking device is provided between each filter plate. This filter press is characterized in that it is provided with a tightening device for tightening between each filter plate in the closed state.

An example will be explained with reference to FIGS. 1 to 7.
A pair of parallel guide rails 13, 13 are horizontally supported by a pair of machine frames 11, 12, and between the pair of guide rails 13, 13 are a pair of tightening heads 1, 2. and a large number of rows of filter plates 5, 5... positioned between the pair of tightening heads 1, 2. 16,16...
are supported on the guide rails 13, 13 via the guide rails 13, and are movable along the longitudinal direction of the guide rails 13.
It is supported on the guide rails 13, 13 via arms 17 projecting out on both sides, and is movable along the longitudinal direction of the guide rail 13. A loose connection means similar to that in a known filter press is used between each of the large number of filter plates 5, 5... located in the filter press, for example, each filter plate 5, 5... is connected back and forth at the upper and lower positions on both sides. A large number of filter plates 5 are connected by links 18, 18, 19, 19, . , 5... columns are each filter plate 5, 5...
When the pair of tightening heads 1 and 2 at both ends are moved forward in the direction of approaching each other from the open state shown in FIG.
The interval α between the filter plates 5, 5, and so on is sequentially closed from both ends, resulting in the closed state shown in FIG. 2 in which all the spaces between the filter plates 5, 5, and When the pair of tightening heads 1, 2 are moved back in the direction away from each other, the distance between each filter plate 5, 5...
It is now in the state shown in Figure 1, where everything is opened.

The filter press according to the invention also includes a movable beam 3 located behind the clamping head 2 and supported at least substantially on the pair of guide rails. . Although the movable beam 3 may have a supporting device protruding from behind the tightening head 2 and be slidably supported thereon, the movable beam 3 in this embodiment is guided by wheels 14. It is supported on the rail 13,
Four hydraulic cylinders 30 are loosely connected between the movable beam 3 and the tightening head 2 so that the spacing thereof can be increased or decreased within a certain range.

That is, the movable beam 3 drives itself forward and backward, or drives the tightening head 2 forward and backward;
Then, the other side is made to follow and interlock with each other by the above-mentioned connecting means.

As mentioned above, in the filter press of the present invention, when the pair of tightening heads 1 and 2 located at both ends of the filter plate row are moved forward and backward at the same time, the number of filter plates 5, 5, . . . At the same time, they can be opened and closed sequentially from both ends, but the pair of tightening heads 1 and 2 have the following simultaneous movement in order to move them forward and backward almost simultaneously in both forward and backward directions. A forward and backward drive device is provided.

That is, the simultaneous forward and backward drive device of this embodiment is
A pair of tightening heads 1, 2 and filter plates 5, 5 between them...
A pair of wheels 21, which are disposed on both sides of the row and are pivoted at appropriate positions on machine frames 11 and 12 (or may be on guide rails 13 and 13), respectively. The string-like driving medium 10 that is stretched between 22 and stretched in a substantially endless manner, and the appropriate position of the portion where this string-like driving medium 10 runs along the longitudinal direction of the guide rail 13 are separately placed. The string-like driving medium 10 of this embodiment is composed of a connecting device connected to the tightening heads 1 and 2, respectively, and a forward/reverse driving device for the string-like driving medium 10. It is a string which is connected 25 at one end to one of the clamping heads 1 and connected 26 at the other end to the other clamping head 2, and which is passed around the wheel 21 behind the clamping head 1. a shaped driving medium 10a and one end connected to one tightening head 1 2
5 and connect the other end to the other tightening head 2 2
6 and the string-like driving medium 10b that is passed around the wheel 22 behind the tightening head 2.
It is configured as a substantially endless string-like driving medium 10. Reference numeral 27 denotes a tightener roll for the string-like driving medium 10, and the shaft 28 of the tightener roll 27 is always urged upward by a shaft support device (not shown).

Incidentally, the string-like driving medium 10 as described above can be configured with a chain or a wire rope, but this string-like driving medium 10 drives the pair of tightening heads 1 and 2 almost simultaneously forward and backward. When the filter plates 5, 5... are opened and closed, only the portions that wrap around the wheels 21, 22 are made of a flexible member such as a chain or wire rope, and these Wheel 21,2
The remaining portion on which 2 is not wound, that is, the linear traveling portion, may be constituted by a rigid rod-shaped body. The string-like driving medium 10 of the embodiment is attached to each wheel 2.
The part wrapped around 1 and 22 is used as a chain,
The wheels 21 and 22 are sprocket wheels.

The above-described forward and reverse drive device for driving the substantially endless string-like driving medium 10 is driven by an interlocking mechanism between the electric motor 20 disposed at a suitable position on the machine frame 11 and the shaft 23 of the wheel 21. When the electric motor 20 is rotated in the normal or reverse direction, a substantially endless string-like driving medium 1 is formed between the filter plates 5, 5...
0 rotates forward or reverse, the tightening heads 1 and 2 are moved forward and backward at the same time, the movable beam 3 moves forward and backward in conjunction with the tightening head 2, and the spaces between the filter plates 5, 5... are moved simultaneously. The filter plates can be closed or opened sequentially, starting from the filter plates at both ends.

In addition, between each of the filter plates 5, 5, which are configured in this manner and are opened and closed, a filter cloth device similar to that in a known fully open/close type filter press is installed, for example, between each of the filter plates 5 in the open state. , 5... is provided with a filter cloth device (not shown) which can be moved all at once to discharge the cake, wash the filter cloth, etc.

The tightening head 1 of the filter press of the present invention is brought to the forward position where the filter plates 5, 5, . . . The following removable locking device is provided to lock the vehicle in the forward position so that it cannot be moved back. That is, the pair of guide rails 13, 13 have locking protrusions 31, 31 protruding inwardly at two positions upward and downward at appropriate positions, respectively, and the locking protrusions 31, 31 on both sides.
A pair of stoppers 3 that can be engaged and disengaged from 1
2 and 32 are a pair of parallel bars 34 and 34, which are supported through the back surface 1a of the tightening head 1 through supporting metal fittings 33, 33 and 33, 33, which are disposed parallel and horizontal to the back surface 1a. Hole 35, 35, 3
5,35, and this pair of stoppers 3
2, 32 are supported by the pair of parallel bars 34, 34 through the holes 35, 35, 35, 35,
This pair of stoppers 3 is configured to be able to move forward and backward in the direction of moving it closer to or away from the guide rails 13 and 13, respectively.
Between 2 and 32 is a hydraulic cylinder 36 supported on the back surface 1a of the tightening head 1;
When the hydraulic cylinder 36 is retracted, the distance between the pair of stoppers 32, 32 is reduced, as shown by the solid line in FIG. kept in position;
When the hydraulic cylinder 36 is extended, the pair of stoppers 32, 32 reach a position where they almost contact the inner surfaces of the pair of guide rails 13, 13, respectively.
The filter plates 5, 5, . . . are moved forward to both sides in FIG. 3, so that the tightening head 1 can be prevented from retreating at the forward position where the gaps between the filter plates 5, 5, . . . are closed. That is, the pair of stoppers 32, 32 moves the tightening head ₁ forward while keeping them in the retracted position shown in FIG. When the space between the two is closed and the space between the two is brought to the forward position (dashed line in FIG. 3) expanded to β ₂ , as shown in FIG. 4,
The rear surface 32b is engaged with each of the locking protrusions 31, 31..., and the front surface 32a is
Rear surfaces 3 of locking projections 38, 38, 38, 38, 38, 38 protruding from both sides of the tightening head 1, respectively.
8a, 38a..., the tightening head 1 can be locked in the forward position where the spaces between the filter plates 5, 5... are closed, and the filter plates 5, 5... cannot be retracted. Of course, this locked state is released when the pair of stoppers 32, 32 are moved back and the distance between them is reduced to _β1 (solid line in FIG. 3).

In FIG. 3, reference numerals 39 and 39 are blocking plates that prevent the pair of stoppers 32 and 32 from moving back to a certain position, 40 is a receiving plate that supports the weight of the stoppers 32, and 41 is a stock solution passage. , 2, 42 is a flexible stock solution supply pipe.

In addition, the movable beam 3 of the filter press of the present invention has a movable beam 3 which moves in conjunction with the tightening head 2 in a state where the distance between it and the tightening head 2 is reduced.
However, each filter plate 5, 5 is moved by the simultaneous forward and backward drive device.
...A removable locking device is provided for locking the movable beam 3 in the forward position in a manner that it cannot be retracted when the movable beam 3 is brought to the forward position with a closed gap. The locking device of the movable beam 3 locks it against the movable beam 3 against the said clamping head 1.
It can be constructed in the same way as the locking device.

1, 2, and 5, reference numeral 131 is a locking projection similar to the locking projection 31, reference numeral 132 is a stopper similar to the stopper 32, and the movable beam 3 is in the forward position, as shown in FIG. , a pair of stoppers 132, 13 provided on the back side of the
2 is engaged with the locking protrusions 131, 131, 131, 131 provided on the guide rails 13, 13, the tightening head 2 locks each filter plate 5, 5...
In the closed position, the movable beam 3 can be locked so that it cannot be moved back.

In the filter press of the present invention, the space between the filter plates 5, 5, . After the movable beam 3 is fixed irreversibly by the above-mentioned stoppers 132, 132, the movable beam 3 acts between the clamping head 2 brought to the forward position and the movable beam 3. A tightening device is provided to move the tightening head 2 further forward and further tighten the filtrates 5, 5, etc. in the state in which they are closed. This tightening device also includes the hydraulic cylinder 30, which is disposed between the tightening head 2 and the movable beam 3. In other words, this hydraulic cylinder 30
serves as both the above-mentioned tightening device and a loose connection device between the above-mentioned tightening head 2 and the movable beam 3, and for this purpose, the pair of tightening heads 1 and 2 are moved back and forth simultaneously. Once brought into the closed state and 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 this tightening head 1 via the string-like driving medium 10 of the simultaneous forward and backward drive device. In order to make the other tightening head 2, which has been moved, move forward by the extension operation of the hydraulic cylinder 30, the simultaneous forward and backward drive device of this embodiment includes the following loosening of the string-like drive medium. equipment is installed. The details will be explained with reference to FIGS. 6 and 7. The string-like driving medium loosening device of the embodiment has a shaft 24 of the wheel 22 located at the rear of the tightening head 2. The shaft 24 is supported so as to be freely displaceable in the direction, and a shaft position displacement control device that moves the shaft 24 forward and backward between two desired positions.In other words, the pair of wheels 22, 22 , dovetail grooves 4 in the longitudinal direction formed on the side surfaces 12b, 12b of the machine frame 12
Sliding hardware 45, 4 that can move forward and backward along 4, 44
The support shaft 24 is rotatably supported by the shaft end of the support shaft 24 passing through the clamp head 5, and the support shaft 24 can be moved forward and backward in the same direction as the tightening head 2 by hydraulic cylinders 46, 46 connected thereto. If the vehicle is moved, the pair of wheels 22, 22 can be controlled to any forward or backward position. Therefore, when the pair of wheels 22, 22 are controlled to the retracted position (FIG. 1), the string-like driving medium 10 is kept in tension, and the pair of tightening heads 1, 2 are moved back and forth almost simultaneously. By driving, the filter plates 5, 5... can be opened and closed simultaneously, and in this way, the filter plates 5, 5... are closed, and the stoppers 32, 32 act on the tightening head 1. Later, when controlling the pair of wheels 22, 22 to the forward position (FIG. 2), the part of the string-like driving medium 10b that is wound around the wheel 22, of the string-like driving medium 10, is relaxed. At least within the range in which the string-like driving medium 10b relaxed in this way allows the tightening head 2 to move forward, the hydraulic cylinder 30 can be further extended, and the extension of the hydraulic cylinder 30 at this time is When the tightening head 2 is moved forward by the operation, it is tightened even more strongly between the closed filter plates 5, 5, and the tightening head 1, which is prevented from moving back by the stopper 32. (retighten).

Next, to explain the operation, in the filter press of the present invention, as mentioned above, the tightening heads 1, 2 at both ends for opening and closing the spaces between the filter plates 5, 5, etc. in an accordion shape, Guide rail 1
3 and 13, the pair of tightening heads 1 and
The two chambers are connected by a simultaneous advance/retreat drive device, and the filter plates 5, 5... are connected in the forward direction, in which the open state is sequentially closed from both ends, and in the backward direction, in which the closed state is sequentially opened from both ends. Since the wheels 22, 22 can be moved forward and backward almost simultaneously in both directions, when the simultaneous forward and backward drive device is driven, that is, in the case of the above embodiment, the wheels 22, 22
is controlled to the retracted position to keep the string-like driving medium 10 in a tensioned state, and each filter plate 5, 5, . . . in FIG.
When the electric motor 20 is rotated in the normal direction in a state where the gaps are open, the pair of tightening heads 1 and 2 are simultaneously moved forward, and the gaps between the filter plates 5, 5, etc. are sequentially closed starting from the two ends. As a result, the filter plate group on the left half and the filter plate group on the right half of FIG. 1 come together from the left and right to the center almost simultaneously, and the space between each filter plate 5, 5, . . . is closed (FIG. 2).

When the electric motor 20 is reversely operated from this closed state, the pair of tightening heads 1 and 2 are simultaneously moved back, and the spaces between the filter plates 5, 5... are sequentially opened starting from both ends. The left half of the filter plate group and the right half of the filter plate group in FIG.
figure).

Therefore, in the filter press of the present invention configured as described above, the time required to open and close the filter plates 5, 5... is shorter than the conventional one when one tightening head 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, approximately 1/2 of the amount is required.

Further, a movable beam 3 is loosely connected behind the tightening head 2 of the filter press of the present invention, and a hydraulic cylinder 30 is connected between both 2 and 3.
Therefore, when the hydraulic cylinder 30 is in the contracted state, the movable beam 3 follows and interlocks with the tightening head 2 while maintaining the minimum distance between them.

Further, the device of the present invention has one tightening head 1
and the movable beam 3 connected behind the other tightening head 2, respectively, in the closed state between the filter plates 5, 5, . . . as described above, the tightening head 1
Since a removable locking device is provided which can irreversibly lock the clamping head 1 and the movable beam 3, these locking devices act on the tightening head 1 and the movable beam 3, respectively. In the above embodiment, the stopper 32 acts on the tightening head 1, the stopper 132 acts on the movable beam 3, and they are kept at predetermined forward positions relative to the guide rail 13 and cannot be moved back. , tightening head 2
If a tightening device is used to further tighten the space between each filter plate 5, 5, etc., that is, in the case of the above embodiment in which the string-like driving medium 10 is fixedly connected to the tightening head 2. , first controls the loosening device for the string-like driving medium, which is a device for making such tightening possible, to enable additional advancement of the tightening head 2 as described above, and also controls the hydraulic cylinder 30. If the tightening head 2 is moved forward by extending the tightening head 2, the filter plates 5, 5, etc., which are closed between the pair of tightening heads 1, 2, will be strongly tightened and the tightening head 2 will be moved forward. The filter press of the present invention is capable of performing a filtration operation by pressurizing the stock solution, and further compressing the cake produced in the filter plate as a result of the filtration operation at high pressure using a diaphragm or the like. Retightening between the filter plates is possible even with a high-pressure hydraulic cylinder with a very short stroke.

Next, another embodiment of the filter press according to the present invention will be explained. Fixed connection 2 to attached heads 1 and 2
Since the string-like driving medium 10, which is attached at 5 and 26, is one of its constituent elements, only the other tightening head 2 can be moved further forward with respect to one tightening head 1 which is locked so as not to be able to move back. Although an example has been shown in which the string-like driving medium 10 is provided with a relaxing device for making it operable, in other embodiments, it may be hung around the wheel 22 behind the tightening head 2. Of the connecting portions of the twisted string-like drive medium portion 10b to each tightening head 1 or 2, at least
The connecting portion for either one of the tightening heads 1 or 2 may be connected to the tightening head 1 or 2 via a detachable connecting device. 10, this embodiment relates to the case where the connecting portion 26 is detachably connected, and in this example, a part of the string-like driving medium 10 is constituted by a rod-like body 50,
A lip 5 is provided on the outer surface of the side wall 2b of the tightening head 2.
A guide hardware 51 having a groove 52 with a groove 2a is fixed thereto, and the rod-shaped body 50 has a groove 52 in the guide hardware 51 that allows the tightening head 2 to move in the forward and backward direction (horizontal direction in the drawing). ) and is supported so as to be slidable relative to the tightening head 2. In addition, the guide hardware 51 and the side wall 2b of the tightening head 2 are
Holes 53 and 54 passing through both are formed at appropriate positions, and a stopper pin 55 is slidably inserted into these holes 53 and 54. 51 so that it can freely move in and out of the groove 52. Further, the rod-shaped body 50 is formed with an engagement hole 56 in which the stopper pin 55 can be inserted and engaged, at a position on the right side in FIGS. 8 to 10.
When the stopper pin 55 is thrust into engagement with the engagement hole 56, the string-like driving medium 10 and the tightening head 2 are interlocked and connected in the direction of movement of the tightening head 2, and the stopper pin 55 is pulled out from the engagement hole 56. Then, the tightening head 2 can be separated from the string-like driving medium 10 and freely moved forward and backward.

The control device for engaging and disengaging the stopper pin 55 from the engagement hole 56 may be such that the base of the stopper pin 55 is connected to a two-position stable solenoid (not shown), or the stopper pin 55 is Since a pair of stopper pins 55, 55 are provided on both side walls 2b, 2b of the tightening head 2, the two stopper pins 55, 55 are connected by a single-acting hydraulic cylinder with a spring that biases them in the direction of extension. Then, this is controlled to protrude and retract between the protruding engagement position shown in FIG. 9 and the retracting and disengaging position shown in FIG. It can be freely connected or disconnected from parts of the body 50 at predetermined relative positions.

In FIGS. 8 to 10, reference numerals 57 and 58 are connection parts between the string-like driving media 10a and 10b and the rod-like body 50. If the connection device 10 and the tightening head 2 are constructed so that they can be connected or disconnected, then the tightening head 2 can be
In the state in which the string-like driving medium 10 is connected, the pair of tightening heads 1 and 2 are moved forward and backward almost simultaneously in both forward and backward directions to open and close the spaces between the filter plates 5, 5, and so on from both ends. 5, 5... If the connection state between the tightening head 2 and the string-like driving medium 10 by the above-mentioned connection device is disconnected in the state where the space between them is closed,
The hydraulic cylinder 30 is extended and the tightening head 2
It will be easily understood that by moving the chisel further forward, it is possible to strongly tighten the spaces between the filter plates 5, 5, . . . in the closed state.

Further, the device for simultaneously advancing and retracting the pair of tightening heads 1 and 2 in the filter press of the present invention can also be configured as follows. The details will be explained with reference to FIGS. 11 to 13. The string-like driving medium 10 of this embodiment is
The parts that are routed through the
0c and 10g, wheels 21 and 22 are sprocket wheels, and each of the above-mentioned chains 10
wire ropes 10e, 10 between c and 10g, respectively.
As i, a pair of chains 10c, 10g
A pair of wire ropes 10e and 10i are connected in an endless series using rod-shaped connecting fittings 10d, 10f, 10h, and 10j. and,
This string-like driving medium 10 is loosely connected to the tightening head 1 at the connecting fitting 10j position, and loosely connected to the tightening head 2 at the connecting fitting 10f position. That is, the connecting fittings 10j, 10
Long holes 6j and 6f are formed in f, respectively.
The tightening head 1 is connected to the connecting fitting 10j via a pin 125 that fits into the elongated hole 6j.
The tightening head 2 is connected to the connecting fitting 10f via a pin 126 that fits in the elongated hole 6f, with the pin 126 loosely moving within the elongated hole 6f. When the string-like driving medium 10 is driven counterclockwise from the open state shown in FIG. The pin 125 engages with the left end of the elongated hole 6f, and the pin 126 engages with the right end of the elongated hole 6f, causing the pair of tightening heads 1 and 2 to move forward together, resulting in the closed state shown in FIG. , tightening head 1
and the stoppers 32 and 1 are attached to the movable beam 3, respectively.
32 (not shown in Figures 11 and 12) to prevent them from retreating, and then extend the hydraulic cylinder 30 (not shown in Figures 11 and 12) to tighten the tightening head 2. When the pin 126 is moved forward in the direction away from the movable beam 3 and tightened between the pair of tightening heads 1 and 2, the pin 126 is inserted into the elongated hole 6f.
This retightening operation is made possible by moving the inside to the left in FIG. 12.

In the above embodiment, both connecting pins 12
Although an example is shown in which the tightening heads 1 and 2 are loosely connected to the string-like driving medium 10 at the 5 and 126 positions, in other embodiments, the tightening heads 1 and 2 are connected loosely to the string-like driving medium 10, respectively. Connecting pin 12 on the attached head 2 side
6 may be loosely connected as described above.

In the above embodiment, the pair of tightening heads 1 and 2 can also be connected by the substantially endless string-like driving medium 10 that is stretched between the pair of wheels 21 and 22. Although an example has been shown, in other embodiments, such interlocking connection means can be implemented by changing it as follows. That is, to explain the outline with reference to FIGS. 14 and 15, the wheels 21 and 22 are sprocket wheels, and a pair of sprocket wheels 61 and 62 are pivotally supported on a guide rail 13 located approximately in the middle between them. , an interlocking gear 63 meshing with each other between the sprocket wheels 61 and 62,
Endless chains 210a and 210b are interlocked and connected through sprocket wheels 21 and 64 and between sprocket wheels 22 and 62, respectively, and a tightening head 1 and a movable beam are respectively attached to each chain 210a and 210b. 3 may be connected 225 and 226.

In each of the above embodiments, the simultaneous advance/retreat drive device disposed on the pair of tightening heads 1 and 2 is configured with a string-like driving medium to which both of the pair of tightening heads 1 and 2 are connected. However, in other embodiments,
This simultaneous drive device may be configured as follows. That is, as schematically shown in FIG. 16, the guide rails 13, 13 are respectively suspended between a pair of sprocket wheels 21, 61 pivotally supported on the outer surfaces thereof, respectively. An endless chain 310a whose straight running portions are arranged on both sides of the tightening head 1, and a pair of sprocket wheels 22 each pivotally supported on the outer surfaces of the guide rails 13, 13, respectively.
An endless chain 3 that extends between 62 and has its straight running portions on both sides of the tightening head 2.
10b and forward/reverse drive devices 320a, 320b for the endless chains 310a, 310b, the tightening head 1 is connected 325 to the endless chain 310a, and the movable beam 3 is connected 326 to the endless chain 310b. In yet another embodiment, as schematically shown in FIG.
a, and a pair of pinions 65a, 65 that mesh with the racks 64a, 64a, respectively, and have their shafts 66a supported by bearings provided on the tightening head 1.
a, a pinion 65a connected to the shaft 66a,
Together with the forward/reverse device 420a of 65a, a forward/backward drive device for the tightening head 1 is configured. A pair of pinions 6 are meshed and have their shafts 66b supported by bearings provided on the tightening head 2 (FIG. 17) or on the movable beam (not shown).
5b, 65b and a forward/reverse drive device 420b for the pinions 65b, 65b connected to the shaft 66b may constitute a forward/backward drive device for the tightening head 2 or the movable beam 3. When the forward/backward drive device for the tightening head 1 and the forward/backward drive device for the tightening head 2 are connected to separate drive sources, the starting and stopping of both forward and reverse drive devices can be automatically controlled. By controlling simultaneously, both the tightening heads 1 and 2 can be driven forward and backward in substantially synchronized manner in the forward and backward directions.

In each of the above embodiments except for FIGS. 14-16, the tightening head 1 and the tightening head 2 are directly connected to each other.
A simultaneous drive device is connected to move the filter plates forward and backward almost simultaneously in both the forward direction in which the open state between each end plate can be closed sequentially from both ends, and the backward direction in which the closed state between each filter plate can be sequentially opened from both ends. Although a certain example has been described, since the space between the tightening head 2 and the movable beam 3 is moved forward and backward as a unit during the above-mentioned forward and backward movement, in other embodiments, the tightening head 2 and the movable beam 3 may be Instead, the tightening head 1 and the movable head 3 are connected to a simultaneous forward and backward drive device similar to the above,
It is also possible to indirectly drive the tightening heads 1 and 2 forward and backward at the same time (for example, the first
4 to 6), in that case, a loosening device for the string-like driving medium 10 or a removable coupling device consisting of a pin 55 and a hole 56 is used to allow additional tightening by the tightening head 2. , or a loose connection device consisting of the elongated hole 6f, pin 126, etc. is unnecessary.

In addition, in each of the above embodiments, the distance between each filter plate is
A tightening device serving as a retightening device between each filter plate is disposed between the tightening head 2 and the movable beam 3 in a closed state by the simultaneous advance and retreat drive device of the pair of tightening heads 1 and 2. Hydraulic cylinder 30 installed
However, in other embodiments, the hydraulic cylinder 30 in each of the above embodiments may be replaced with a screw jack (not shown). In the embodiment, locking devices for locking the tightening head 1 and the movable beam 3 at predetermined forward positions in a manner that they cannot be retracted are provided on the inner surfaces of the pair of guide rails 13, 13, respectively. Protrusions 31, 131 and movable stoppers 32, 132 that can be freely engaged and detached from these.
Although examples have been shown in which the locking devices are configured with
Of course, the locking device may be replaced with a known locking device such as 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 1, 2 and a large number of filter plates 5, 5, etc. positioned between them. , each of which is supported so as to be movable along the longitudinal direction of a pair of guide rails, and which are connected via a loose connection means so as to be openable and closable. In this case, the pair of tightening heads 1 and 2 are fitted in both the forward direction, which sequentially closes the open state between each filter plate from both ends, and the backward direction, which sequentially opens the closed state between each filter plate, from both ends. At least, a simultaneous advance/retreat drive device for moving them back and forth almost simultaneously is provided, and when closing between each filter plate, the closing operation is performed simultaneously from both ends toward the middle position of the row of filter plates. When opening between each filter plate, the opening operation can be performed simultaneously from both ends in the direction away from the middle position of the row of filter plates, so the time required for this opening/closing operation is: Compared to a conventional filter press that opens and closes between each filter plate only from one end of the filter plate row, if the filter plate rows are of the same length, it is approximately 1/2
2 is sufficient, and a filter plate row approximately twice as long can be opened and closed within the same required time. 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 1 and 2 are advanced a predetermined amount in a direction toward each other, and the space between each filter plate is closed. The means for tightening the gaps between the filter plates under high pressure in the above-mentioned state includes a removable locking device that can lock one of the tightening heads 1 in the above-mentioned forward position irreversibly, and a locking device of the other tightening head 2. a movable beam 3 located at the back and connected to the tightening head 2 via a loose connection means so that the distance between the two can be increased or decreased within a certain range;
The movable beam 3 is comprised of a removable locking device that can lock the movable beam 3 in a predetermined forward position in a non-retractable manner, and a tightening device disposed between the movable beam 3 and the tightening head 2. Therefore, when comparing the stroke of the tightening device mentioned above with the tightening stroke of a conventional device in which the tightening device between each filter plate moves only one tightening head back and forth to open and close the gap between each filter plate,
It is possible to reduce the stroke by which the tightening heads 1, 2 are moved back and forth. That is, compared to the conventional device as described above, the stroke of the high-pressure tightening device can be extremely shortened, so that a large number of filter plates can be tightened with a low-cost high-pressure tightening device.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the filter press according to the present invention, and FIG. 2 is a side view with the filter plates open, and FIG. Figure 3 is a rear view of one tightening head (the cross section is taken along the - line in Figure 2), Figure 4 is a side view of the same (the cross section is taken along the - line in Figure 3), and Figure 5 is the other one. Side view showing the clamping head and movable beam, No. 6
The figure is a side view showing the loosening device for the string-like driving medium, FIG. 7 is a front view of the same (the cross section is taken along the - line in FIG. 6), and FIG. 8 is the relationship between the string-like driving medium and the tightening head. A side view of the removable coupling device, FIG. 9 is a partially cutaway plan view showing the engaged state, FIG. 10 is a partially cutaway plan view showing the detached state, and FIGS. 11 and 12 are the string-like driving medium. FIG. 13 is an enlarged view of the same part, FIG. 14 is a side view of the filter press showing an outline of another embodiment, FIG. 15 is a cutaway plan view of the same part, and FIG. Figures 16 and 17 are partially cutaway schematic side views of a filter press showing still other embodiments. 1, 2... Tightening head, 3... Movable beam, 5
...filter plate, 10, 10a, 10b, 110a, 1
10b, 210a, 210b, 310a, 310
b... String-like driving medium, 11, 12... Machine frame, 13
... Guide rail, 18, 19 ... Link, 2
0, 320a, 320b, 420a, 420b...
...Electric motor, 21, 22...Wheel, 30...Hydraulic cylinder (coupling means and tightening installation), 31, 13
1... Locking protrusion, 32, 132... Stopper.

Claims (1)

[Scope of Claims] 1. A pair of tightening heads 1 and 2, located between the pair of tightening heads 1 and 2, on a pair of parallel guide rails supported by a machine frame. In a filter press in which a plurality of filter plates are respectively supported so as to be movable along the longitudinal direction of the rails, a filter plate is provided between each of the pair of tightening heads 1 and 2 and the filter plates positioned therebetween. The pair of tightening heads 1 and 2 are connected to each other via a loose connection means so as to be openable and closable; A simultaneous drive device is disposed for moving them forward and backward almost simultaneously in both directions, including a backward direction in which the screws are opened sequentially from both ends. A substantially supported movable beam 3 is arranged, and the distance between this movable beam 3 and the clamping head 2 can be increased or decreased within a certain range by means of a loose connection. , connected to both the tightening head 1 and the movable beam 3,
A removable locking device is provided for locking them in a predetermined forward position in a manner that they cannot be retracted. Between the tightening head 2 and the movable beam 3, a locking device is provided between each filter plate. A filter press is provided with a tightening device for tightening between each filter plate when the filter press is closed. 2. The simultaneous driving device disposed on the pair of tightening heads 1, 2 is arranged on both sides of the row consisting of the pair of tightening heads 1, 2, the movable beam 3, the filter plate, etc.,
In addition, a string-like driving medium is suspended between a pair of wheels that are respectively pivotally supported at appropriate positions on the machine frame or the guide rail, and is stretched substantially endlessly. a connecting device that connects the proper positions of the parts running in opposite directions along the direction to the tightening heads 1 and 2, respectively;
The filter press according to claim 1, comprising a forward/reverse drive device for the string-like drive medium. 3. The string-like driving medium is connected at one end to one tightening head 1 and at the other end to the other tightening head 2, and is wound around a wheel behind the tightening head 1. A string-shaped drive medium 10a, one end of which is connected to one of the tightening heads 1, the other end of which is connected to the other tightening head 2, and a string-shaped drive that is passed around a wheel behind the tightening head 2. The filter press according to claim 2, wherein the filter press and the medium 10b are substantially endless. 4 The connecting device between the string-like driving medium and each tightening head 1, 2 connects the string-like driving medium at a proper place to the tightening head 1.
and a fastening device that is fixed and connected to the appropriate position of the tightening head 2, and the tightening head 2
For allowing the tightening head 2 to be moved forward by the tightening device between the filter plates in a state where the gaps between the filter plates are closed, by the string-like driving medium that is passed around the wheel at the rear of the filter plate. The filter press according to any one of claims 2 to 4, wherein a loosening device for a string-like driving medium is provided. 5 The string-like driving medium loosening device is configured to loosen the shaft of the wheel rearward of the tightening head 2.
A bearing device for the wheel supported so as to be freely displaceable in the advance/retreat direction, and a bearing device for the wheel supported in a desired direction
The filter press according to claim 4, further comprising a bearing displacement control device that moves the filter press forward and backward between positions. 6 each tightening head 1 of the part of the string-like driving medium that is wrapped around the wheel behind the tightening head 2;
Any one of claims 2 to 5, wherein at least one of the connecting portions to the tightening head is connected to the tightening head via a detachable connecting device. Filter press described in one section. 7. According to claim 2, the coupling device provides at least a constant free stroke between the string-like driving medium and the tightening head 2, thereby loosely coupling them therebetween. Filter press as described. 8. The simultaneous driving device disposed on the pair of tightening heads 1, 2 is arranged on both sides of the row consisting of the pair of tightening heads 1, 2, the movable beam 3, the filter plate, etc.,
In addition, a string-like driving medium is suspended between a pair of wheels that are respectively pivotally supported at appropriate positions on the machine frame or the guide rail, and is stretched substantially endlessly. A connecting device that connects the parts running in opposite directions along the direction to the tightening head 1 and the movable beam 3, respectively, and a forward and reverse driving device for this string-like driving medium are used. A filter press according to claim 1, comprising: a filter press according to claim 1; 9 The string-like driving medium has one end connected to the tightening head 1, the other end connected to the movable beam 3, and a string-like driving medium 10a that is hung around a wheel behind the tightening head 1. , one end of which is connected to the tightening head 1, the other end of which is connected to the movable beam 3, and the string-like driving medium 10b is wound around a wheel behind the tightening head 2, so that it is substantially endless. 9. The filter press according to claim 8, which is configured in a shape. 10. The filter press according to any one of claims 2 to 9, wherein at least a part of the string-like driving medium is a chain. 11. The filter press according to any one of claims 2 to 9, wherein at least a part of the string-like driving medium is a wire rope. 12. Claims 2 to 12, wherein a part of the string-like driving medium is a chain and the remaining part is a rod-like body.
The filter press described in any one of Items 9. 13. The filter press according to any one of claims 2 to 9, wherein a part of the string-like driving medium is a wire rope and the remaining part is a rod-like body. 14. The filter press according to any one of claims 2 to 9, wherein a part of the string-like driving medium is a chain, another part is a wire rope, and the remainder is a rod-shaped body. . 15. Claims 2 to 14, wherein the forward/reverse drive device for the string-like driving medium is a reversible electric motor interlockingly connected to either one of the pair of wheels.
A filter press described in any one of the sections. 16 The simultaneous drive device disposed on the pair of tightening heads 1 and 2 meshes with a rack provided along the pair of guide rails to cause its shaft to bear on the tightening head 1. Claim 1, which comprises a pinion, a pinion which is similarly engaged with the rack and whose shaft is supported on the tightening head 2, and a forward/reverse drive device for each of the pinions. filter press. 17 The simultaneous drive device disposed on the pair of tightening heads 1 and 2 meshes with a rack provided along the pair of guide rails so that its shaft is supported on the tightening head 1. Claim 1, further comprising a pinion, a pinion which is also easily engaged with the pinion and whose shaft is supported on the movable beam 3, and a forward/reverse drive device for each of the pinions. filter press. 18 The locking device of the tightening head 1 is configured such that the locking device of the tightening head 1 is provided with a protrusion protruding from a suitable position on each side of the pair of guide rails, and a locking device of the tightening head 1 that can freely move forward and backward in a direction perpendicular to the side surfaces of the guide rail. The filter press according to any one of claims 1 to 17, comprising a pair of movable stoppers and a device for driving the pair of movable stoppers forward and backward. 19 A locking device for the movable beam 3 is configured such that the movable beam 3 is movable in a direction perpendicular to the side surfaces of the guide rails and can be moved back and forth between protrusions protruding from appropriate positions on each side of the pair of guide rails and at appropriate positions of the movable head 3. The filter press according to any one of claims 1 to 18, comprising a pair of movable stoppers and a device for driving the pair of movable stoppers forward and backward. 20. The filter press according to any one of claims 1 to 19, wherein the tightening device is a hydraulic cylinder. 21. The filter press according to any one of claims 1 to 19, wherein the tightening device is a screw jack. 22. A filter press according to claim 20 or 21, wherein the clamping device is also a loose connection between the clamping head 2 and the movable beam 3.