JPH0334259Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a rotating direction changing device for an endless chain for feeding a filter plate of a filter press.

In this specification, the term "front and rear" hereinafter refers to the first head side as the front and the rear head side as the rear. Furthermore, left and right are defined with the front side as a reference.

Furthermore, filter presses include single-type presses in which only filter plates are arranged side by side, and double-type presses in which filter plates and filter frames are arranged alternately, and this invention can be applied to both of these types. Therefore, in this specification, the term "filter plate" includes not only the filter plate but also both the filter plate and the filter frame.

BACKGROUND TECHNOLOGY In general, after completion of compression filtration using a filter press, in order to remove filter slag adhering to the filter cloth,
It is necessary to pull back the filter plates one by one, but this is done by rotating an endless chain through a filter plate pulling mechanism equipped with a filter plate pull-back claw in the middle. In that case, remove the filter plate by 1
Each time the blade was pulled back, the direction of rotation of the endless chain was changed. As such a device for changing the rotation direction of an endless chain for feeding a filter plate, the present applicant first attached a cradle to one end of the filter press so as to be able to swing freely, and on this cradle, a cradle for feeding the filter plate was installed. A motor that rotates the endless chain via a transmission mechanism is attached, and a switch for changing the rotational direction of the motor is placed near the swinging end of the pedestal. proposed a device equipped with a contactor that operates this switch by motion (see Japanese Utility Model Application Publication No. 128306/1983).
However, in this conventional device, the filter plate is moved while the hanging hand of the filter plate is hooked by the claw of the pulling mechanism of the endless chain, and when the filter plate stops, a load is applied to the claw and the chain. , the pedestal swings and the switch is activated, changing the direction of rotation of the endless chain, but during this time, the filter plate of the claw remains hooked to the hanger, so a large load is placed on the hanger. It operates for a long time, and therefore the hanging handles and claws of the filter plate, as well as the endless chain, require great strength.Also, in order to allow the pedestal on which the motor is mounted to swing, the pedestal and its pivot part must be strong. Therefore, the manufacturing cost of the filter press is high, and there are problems in that the life of members such as the hanger and claw of the filter plate, as well as the endless chain, is very short and the durability is poor. Furthermore, the conventional apparatus is not compact and requires a large installation space, and in addition, when the pedestal swings, noise is generated, resulting in a poor working environment. Conventionally, the amount of detected load was set by directly pressing the swinging end of the pedestal with an adjustment coil spring and adjusting the spring's pressing force. Even if this is a little small, the swinging end of the pedestal will swing due to a slight load, making it extremely difficult to set the amount of load detected by the coil spring.

Purpose of the invention The purpose of this invention is to solve the above-mentioned problems of the prior art. When a load is applied to the claws and the chain due to the stoppage of the filter plate, the direction of rotation of the endless chain is not only quickly changed, but also during this period. , the claws and the filter plate hangers are in a no-load state, and therefore the filter plate hangers and claws, as well as the endless chain, do not require great strength, making the filter press easy to manufacture and improving durability. In addition, it is extremely compact, requiring less installation space, making it possible to make the filter press more compact, and the detection load amount can be set very easily, making it easy to handle. ,
Moreover, it is an object of the present invention to provide a rotational direction changing device for an endless chain for feeding a filter plate in a filter press, which does not generate any noise when changing the rotational direction of the chain.

Structure of the invention In order to achieve the above object, this invention consists of an endless chain with a filter plate traction mechanism in the middle, and a pair of front and rear chain foils around which the winding part of the endless chain is wound. and an intermediate chain wheel which is provided coaxially with one of the shafts of these chain wheels and to which the driving force is transmitted from the motor through the transmission chain, in which a load detector is installed in the vicinity of the motor. is arranged, and the load detector connects the first rotating body attached to the output shaft of the motor and the first rotating body.
A second rotating body is fitted to the rotating body so as to be freely rotatable, and a rotating body is provided on one of the first rotating body and the second rotating body and presses the other rotating body with a predetermined pressure. a pressing engagement means for integrally coupling the two rotating bodies; a transmission chain wheel provided on the second rotating body; and a spring force provided on the outer surface of one of the first and second rotating bodies. an actuating plate that is biased away from the rotating body by a cam; an actuating plate holding cam provided on the other rotating body; A conduction chain is wound around the intermediate chain wheel and the transmission chain wheel, and in the normal rotating state for feeding the filter plate of the endless chain, the first The rotary body and the second rotary body are integrally coupled and rotated through a press engagement means, and the claw of the filter plate traction mechanism interposed between the endless chains is provided at the filter plate hanger or at a predetermined position. Upon reaching the stoppage,
When the endless chain is stopped and an overload is applied to the second rotating body, the engagement by the pressing engagement means is disengaged and only the first rotating body continues to rotate, and at the same time, the holding by the actuating plate holding cam is released. Rotation of the endless chain for feeding the filter plate of a filter press, in which the actuating plate is urged away from the rotating body and hits a changeover switch, and the direction of rotation of the motor is switched by a signal from the switch. The gist is a direction changing device.

Embodiment Next, an embodiment of this invention will be described based on the drawings.

In this embodiment, this invention is applied to a so-called side plate type filter press in which a large number of filter plates are supported by a pair of left and right side plates and are opened and closed.

In the drawing, the filter press includes a first head 3 and a rear head 4 each having a stand 1, a pair of left and right side plates 2, 2 that are fixed across these, and a loose head 5 that is movably provided on the left and right side plates 2, 2. A cylinder 6 is provided on the rear head 4 to move the loose head 5 forward and backward, and a number of filter plates 7 are slidably suspended from a pair of side plates 2 by hangers 8. Endless chains 11, 11 for feeding the filter plate are disposed in the middle along the pair of left and right side plates via the filter plate pulling mechanism 12, and the winding portions at both ends of each endless chain 11, 11 are It is wrapped around a pair of front and rear chain foils 13 and 14, respectively. The filter plate traction mechanism 12 is provided with a filter plate pull-back pawl 41 and a stop pawl 42 that are erected by the force of a pair of tension springs 45, 45.

Axis 15 of chain wheels 13 and 14 on both front and rear sides
an intermediate chain wheel 16 to which driving force is transmitted via a transmission chain 19 from a reversible motor 17 with a speed reducer coaxially with one of the front pivots 15a among the front pivots 15a and 15b;
is provided. In addition, the front chain foil 13
The pivot shaft 15a extends over a pair of left and right bearings 48, 48 provided on the first head 3, and the front chain wheel 13 is attached to both left and right ends of the pivot shaft 15a. Further, the pivot shaft 15b of the rear chain wheel 14 is separated on both left and right sides, and each is attached to a take-up device 47. The motor 17 is installed on a mounting base 49 fixed to the first head 3.

In the first head 3, a load detector 20 is arranged close to the reversible motor 17. As shown in detail in FIGS. 3 to 5, this load detector 20 includes a first rotating body 21 attached to an output shaft 18 of a motor 17, and a first rotating body 21 attached to an output shaft 18 of a motor 17.
The second part is fitted to the first part so as to be freely rotatable.
a rotating body 22, a pressing engagement means 23 which is provided on one of the second rotating bodies 22 and which presses down the first rotating body 21 with a predetermined pressure to join the two rotating bodies 21 and 22 together; A transmission chain wheel 24 provided on the two rotating bodies 22 and a second rotating body 22
The rotating body 2 is provided on the outer surface of the rotary body 2 via a spring pin (not shown), and is rotated by the elastic force of the spring 26.
an annular actuating plate 25 that is biased in a direction away from the second rotating body 2; a pair of actuating plate holding cams 27 provided on the first rotating body 21;
2 and a limit switch 28 for switching the direction of motor rotation disposed close to the side surface 25a on the opposite side. Further, as shown in FIG. 1, a transmission chain 19 is wound around the intermediate chain foil 16 and the transmission chain foil 24.

Here, the pressing engagement means 23 is the second rotating body 22
The lever 30 is swingably attached by having its intermediate portion supported by a pin 29 and has an engaging roller 31 at its tip. An engaging roller fitting recess 32 is provided, and by fitting the roller 31 into the recess 32, the first and second rotating bodies 21, 22 are integrally coupled. Spring storage through hole 33 provided in the second rotating body 22
A coil spring 34 is housed in the coil spring 34, and the tip of the coil spring 34 is applied to the swinging end 30a of the lever 30 via an abutting member, and the elastic force of the coil spring 34 causes the lever 30 to move. The engagement roller 31 is pressed through the engagement roller 31 so that the roller 31 fits into the recess 32 . The pressing force of the roller 31, that is, the elastic force of the coil spring 34, can be adjusted by rotating an adjusting screw 36 that is brought into contact with the base end of the roller 31 and housed in a female threaded portion in the through hole 33 to move it forward or backward. can.

Further, the actuation plate holding cams 27, 27 are respectively provided inwardly protruding on both sides of the flange 37 provided at the right end of the first rotating body 21, while the annular actuation plate 2
Convex portions 3 protruding toward the center on both sides of the inner peripheral edge of 5
5 and 35, respectively, and as shown by solid lines in FIGS. 3 to 5, the first rotating body 21 and the second
When the rotating body 22 rotates together, the tips of the pair of actuating plate holding cams 27, 27 touch the actuating plate 25.
By pressing the convex portions 35, 35 of the actuating plate 2
5 is pressed against the outer surface of the second rotating body 22 against the elastic force of the spring 26 and brought into contact therewith.

The limit switch 28 for changing the motor rotation direction is attached to the upper end of a support rod 38 that is provided in an upright manner on the mounting base 32 of the motor 17, and its contact 39 is attached to the side surface 25a of the actuating plate 25. It is being

1 and 6 show details of the filter plate traction mechanism 12. Since the same mechanisms 12 are arranged facing each other on both the left and right sides of the filter press,
One of them will be explained below.

The filter plate pulling mechanism 12 includes a long, approximately shaped claw attachment block 40 attached to the middle of the endless chain 11, and a filter plate pull-back claw 41 is attached to a portion near the front end of the block 40 from a headed pin. It is swingably attached by a pivot 43,
Also, a stop pawl 4 is located near the rear end of the frame 40.
2 is swingably attached by a pivot 43 made of a headed pin. And the lower ends 41a, 42 of the claws 41, 42 beyond the pivots 43, 43 downward.
a and a ring-shaped spring hook protrusion 44 provided at the lower end of the center of the block 40. A pair of tension springs 45, 45 are stretched between
5 and 45, the claws 41 and 42 are always urged to stand up. In the upright state, these claws 41 and 42 are brought into contact with vertical portions at both front and rear ends of the block 40, respectively.

At the upper ends of the vertical parts on both the front and rear sides of the claw attachment block 40, a band-shaped filter plate pull-back claw push-down member 50 having elongated holes 52, 52 at both ends is passed.
Headed pins 51, 51 are loosely inserted into the elongated holes 52, 52, and this push-down member 50
can be moved back and forth in the length direction of the block 40 by the length of the elongated holes 52, 52. The filter plate pull-back pawl 41 and the stop pawl 42 are sandwiched between the horizontal portion of the block 40 and the push-down member 50. Then, the claw 41 is attached to a portion near the upper end of the filter plate pull-back claw 41.
A long hole 53 that is long in the length direction is attached, and a pin 54 is provided in a portion near the front end of the push-down member 50 so as to protrude toward the pull-back claw 41 side. is inserted into. The elongated hole 53 has a length that allows the filter plate pull-back claw 41 to swing in a normal state.

Rollers 55, 55 are attached to the lower ends of the vertical parts on both the front and rear sides of the claw attachment block 40, and these rollers 55, 55 roll on guide members 56 attached to the side plate 2 in the length direction. do.

A first stopper 61 and a second stopper 62 are provided at both front and rear ends of the side plate 2, and a first stopper 61 and a second stopper 62 that come into contact with the end of the member 50 for pushing down the filter plate pull-back claw are provided. A limit switch 65 for stopping rotation of the chain is provided. Further, near the front side of each of the driving rollers 9 provided on both sides of the loose head 5, guide pieces 64 having a substantially arcuate shape when viewed from the side are attached for holding down the filter plate feeding claws 41.

Next, the operation of the filter press will be explained.

After the squeeze filtration is completed, the loose head 5 is first pulled back to a predetermined position by retracting the piston rod of the cylinder 6, and then the filter slag adhering to the filter cloth 10 attached to both sides of the filter plate 7 is removed. For this purpose, pull back the filter plates 7 one by one.

To pull back the filter plate 7, first rotate the reversible motor 17 with a speed reducer in the forward direction, and then rotate the chain wheel 13,
14 and the endless chain 11 are rotated clockwise when viewed from the side. As the endless chain 11 rotates, the filter plate pulling mechanism 12 moves forward.
In this way, in the normal rotating state in which the filter plate 7 of the endless chain 11 is fed, since the engaging roller 31 is fitted into the recess 32 with a predetermined pressing force, the first rotating body 21 and the second rotating body 22 are integrally connected via this pressing engagement means 23 and rotated.

When the filter plate pulling mechanism 12 reaches the first filter plate 7 from the rear, the front filter plate pull-back claw 41 passes under the hanger 8 while falling down, and stands up after passing over the hanger 8. Since the rear stop claw 42 remains upright, it hits the hanger 8.
Therefore, the filter plate pulling mechanism 12 cannot move forward beyond that point, the endless chains 11, 11 stop, and an overload acts on the second rotating body 22. As a result, the engagement roller 31 escapes from the recess 32 and is disengaged, and only the first rotating body 21 continues to rotate, and the pair of actuating plate holding cams 27 of the first rotating body 21 are released, and the first rotating body 21 is released. As shown by the two-dot chain line in FIG.
8, the direction of rotation of the reversible motor 17 is switched by a signal from the switch 28. When the rotation direction of the motor 17 is switched and its output shaft 18 and first rotating body 21 rotate counterclockwise, the pair of rotating bodies 22 pressed against the outer peripheral surface of the first rotating body 21 rotates. Engagement roller 3
1 rolls on this outer circumferential surface and fits into the recess 32 of the first rotating body 21, whereby the first rotating body 2
1 and a second rotating body 22 are integrally coupled and rotated, and a chain foil 2 provided on the second rotating body 22
The endless chain 11 wound around 4 also rotates in the counterclockwise direction. As a result, the filter plate pull-back claw 41 on the front side hooks the hanger 8 of the filter plate 7, and the filter plate 7 is returned to the depth of the already retreated loose head 5. When the filter plate 7 hits the loose head 5, it cannot move forward, so the filter plate traction mechanism 12 stops there, the endless chain 11 stops, and an overload is applied to the second rotating body 22. Similarly, when the engagement by the press engagement means 23 is disengaged, the rotation direction of the motor 17 is further switched to the opposite direction, thus to the original direction, and the endless chain 11 is rotated clockwise again. The filter moves forward toward the second filter plate 7. Thereafter, the filter plates 7 are sequentially pulled back one by one in the same manner. Incidentally, FIG. 1 shows a state in which the filter plates 7 are being sequentially pulled back in this manner.

If the filter plate pulling mechanism 12 were to stop in front of these filter plates 7 after all the filter plates 7 have been pulled back, the filtering operation would be at an impasse.
Therefore, it is necessary to have the filter plate pulling mechanism 12 stand by beyond the filter plate 7 and the loose head 5.
The effect will be described below.

When the last filter plate 7 is pulled back toward the loose head 5, the filter plate pulling mechanism 12 is moved toward the first head 3 again by the forward rotation of the endless chain 11. And this member 50 for pushing down the filter plate pull-back claw
When the front end of the push-down member 50 comes into contact with the first stopper 61, the push-down member 50 moves rearward by the length of the elongated holes 52, 2, and the filter plate pulling mechanism 12 stops. As the push-down member 50 moves, the pin 54 provided at the front end of the push-down member 50 moves from front to back inside the elongated hole 53 of the filter plate pull-back claw 41, and thereby the claw 4
1 is forced downward and held there. When the filter plate traction mechanism 12 is stopped, the load detector 20 is activated, and the endless chain 11 is rotated in the opposite direction by the reverse rotation of the motor 17.
The filter plate traction mechanism 12 moves rearward. Then, when the filter plate traction mechanism 12 reaches the filter plate 7 in the open state, the filter plate pull-back claw 41 remains collapsed, so the filter plate traction mechanism 12 all passes under the hanger 8 of the filter plate 7, Furthermore, the push-down member 50 passes under the guide piece 64 of the loose head 5, and the rear end of the push-down member 50 contacts the second stopper 62, so that the push-down member 50 is inserted into the elongated holes 52, 52. When the filter plate traction mechanism 12 is moved forward by the same amount and stops, the filter plate traction mechanism 12 simultaneously contacts the limit switch 63, thereby stopping the motor 17 and stopping the rotation of the endless chain 11. Further, due to the movement of the push-down member 50, this pin 54 moves from the rear to the front within the elongated hole 53 of the filter plate pull-back claw 41, and thereby the filter plate pull-back claw 41
5 returns to the original standing state.

Thereafter, the filtration operation using the filter press is repeated in the same manner.

In the above embodiment, the rotating direction changing device for the endless chain for feeding the filter plate is attached to the first head 3 side of the filter press, but it may be attached to the rear head 4 side.

Further, the pressing engagement means 23 of the load detector 20 may be provided on the first rotating body 21, contrary to the case of the above embodiment, and its structure is not limited to that shown in the drawings.

Further, in the above embodiment, the present invention is applied to a so-called side plate type filter press in which a large number of filter plates are supported by a pair of left and right side plates and opened and closed, but this invention is not limited to this. The same applies to a so-called overhang type filter press in which a large number of filter plates are suspended from an upper rail to be opened and closed. The endless chain 11 made into a shape is
As in the above embodiment, a pair of filter plates may be used on the left and right sides, or only one filter plate may be placed in the center of the upper part of the filter plate. In addition, in the case of an overhang type filter press, the filter plate traction mechanism 1
The second claws 41 and 42 are directed downward, unlike in the above embodiment.

Effects of the invention As described above, this invention consists of an endless chain 11 with a filter plate traction mechanism 12 in the middle, and a pair of front and rear chain foils 13 around which the winding portion of the endless chain 11 is wound. ,1
4 and the axis 1 of these chain foils 13 and 14
In a filter press equipped with an intermediate chain wheel 16 that is coaxial with one of the pivot shafts 5a and 15b and to which driving force is transmitted from a motor 17 via a transmission chain 19, a load detector 20 is installed near the motor 17. is arranged, and the load detector 20
A first rotating body 21 attached to the output shaft 18 of the motor 17, and a second rotating body 22 fitted to the first rotating body 21 so as to be freely rotatable.
is provided on one of the first rotating body 21 and the second rotating body 22, and presses the other rotating body with a predetermined pressure, so that both rotating bodies 21,
22, a pressing engagement means 23 for integrally coupling the parts 22 together;
Transmission chain wheel 2 provided on second rotating body 22
4, an actuating plate 25 provided on the outer surface of one of the first and second rotating bodies 21 and 22 and biased in a direction away from the rotating body by a spring force; The actuating plate holding cam 27 is provided on the rotary body, and the motor rotation direction switching switch 28 is disposed close to the side surface 25a of the actuating plate 25 on the side opposite to the rotary body. , a conduction chain 19 is wound around the intermediate chain foil 16 and the transmission chain foil 24, and in the normal rotating state in which the filter plate 7 of the endless chain 11 is fed, the first rotating body 21 and the second rotating body 22 are rotated. The claws 41 and 42 of the filter plate traction mechanism 12 are connected together and rotated via the pressing engagement means 23 and are interposed in the middle of the endless chain 11.
hits the filter plate hanger 8 or the stoppers 61 and 62 provided at predetermined positions, and the endless chain 1
1 stops and an overload is applied to the second rotating body 22, the engagement by the pressing engagement means 23 is released and only the first rotating body 21 continues to rotate, and at the same time,
The press by the actuating plate holding cam 27 is released, the actuating plate 25 is urged away from the rotating body 22, hits the changeover switch 28, and the rotation direction of the motor 17 is switched by a signal from the switch 28. Since the direction of rotation of the endless chain 11 can be changed, when the filter plate 7 is stopped, the claw 41 or the claw 4
2 and the chain 11, not only is the direction of rotation of the endless chain 11 quickly changed, but during this time the claws 41, 42 and the hanger 8 of the filter plate 7 are in an unloaded state, and therefore The hanging handle 8 and claws 41, 42 of the filter plate 7, as well as the endless chain 11, do not require great strength, making the filter press easy to manufacture, excellent in durability, and extremely compact and easy to install. It requires less space, and therefore the filter press can be made more compact.
By adjusting the pressing force of the pressing engagement means 23 that presses the rotating body 21 and the second rotating body 22 together with a predetermined pressure, the detection load amount can be set very easily. It is easy to handle and does not generate any noise when changing the direction of rotation of the endless chain 11, and therefore does not deteriorate the working environment of press filtration.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, and FIG. 1 is a front view of a filter press equipped with the invention;
Figure 2 is a right side view of the same filter press, Figure 3 is an enlarged partially cutaway front view showing the motor and load detector, Figure 4 is an enlarged partially cutaway side view of only the load detector, FIG. 5 is an enlarged perspective view of the same, and also shows the motor rotation direction changeover switch.
FIG. 6 is an enlarged side view of essential parts showing details of the filter plate traction mechanism. 2...Side plate, 3...First head, 4...
Rear head, 5... Loose head, 7... Filter plate, 8
...Hanging hand, 11...Endless chain, 12...
Filter plate traction mechanism, 13, 14... chain foil, 1
5a, 15b... Pivot, 16... Intermediate chain foil, 17... Reversible motor with reducer, 18... Output shaft, 19... Transmission chain, 20... Load detector, 21... First rotating body, 22 ...Second rotating body,
23... Pressing engagement means, 24... Transmission chain wheel, 25... Operating plate, 26... Coil spring, 27
...Cam for holding down the operating plate, 28...Switch for changing the motor rotation direction, 30...Lever, 31...Engagement roller, 32...Engagement roller fitting recess,
41... Filter plate pull-back claw, 42... Stop claw.

Claims (1)

[Scope of utility model registration request] An endless chain 11 with a filter plate traction mechanism 12 in the middle, a pair of front and rear chain foils 13, 14 around which the winding portion of the endless chain 11 is wound, and pivots of these chain foils 13, 14. In a filter press equipped with an intermediate chain wheel 16 which is provided coaxially with one of the pivot shafts of the motors 15a and 15b and to which driving force is transmitted from the motor 17 via the transmission chain 19, a load detector is installed near the motor 17. 20 is arranged, and the load detector 20 is connected to the output shaft 1 of the motor 17.
The first rotating body 21 attached to the
A second rotating body 22 is fitted to the rotating body 21 so as to be freely rotatable; Among the first and second rotating bodies 21, 22, there is a pressing engagement means 23 that connects the two rotating bodies 21, 22 together by pressing them together, a transmission chain wheel 24 provided on the second rotating body 22, and the first and second rotating bodies 21, 22. an actuating plate 25 provided on the outer surface of one of the rotating bodies and biased in a direction away from the rotating body by a spring force, and an actuating plate holding cam 27 provided on the other rotating body; Actuation plate 25
A conduction chain 19 is connected to the intermediate chain wheel 16 and the transmission chain wheel 24.
is wound around the filter plate 7 of the endless chain 11, and in a normal rotating state in which the filter plate 7 of the endless chain 11 is fed, the first rotating body 21 and the second rotating body 22 are coupled together via the press engagement means 23 and rotate. When the claws 41 and 42 of the filter plate traction mechanism 12 interposed between the endless chain 11 hit the filter plate hanger 8 or the stoppers 61 and 62 provided at predetermined positions,
The endless chain 11 stops and the second rotating body 22
When an overload is applied to the pressing engagement means 23, only the first rotating body 21 continues to rotate, and at the same time, the actuating plate holding cam 27 releases the actuating plate 25, and the actuating plate 25 is released from the rotating body. The motor 1 is biased away from the switch 22 and hits the changeover switch 28, and the signal from the switch 28 causes the motor 1 to
A rotating direction changing device for an endless chain for feeding a filter plate of a filter press, in which the rotating direction of the filter plate of the filter press can be switched.