JPH05338760A - Screen conveyor - Google Patents

Abstract

PURPOSE:To make it feasible to prevent gap between conveyor platform bars from being plugged as well as to reduce conveyance resistance by providing a presser member, which is inserted into the gap between and makes a linking motion with a conveyor platform bars which makes a reciprocating movement back and forth by means of a crank shaft driven by a motor. CONSTITUTION:A conveyor platform 2 makes a reciprocating movement back and forth in parallel to an interlocking member 5 by means of the rotation of a crank shaft 7 driven by a motor. A cam case and a cam plate make displacement toward the same 'a' direction linking with the conveyor platform 2. This causes a cam surface portion 12a of the cam plate 12 to push a roller 14 of an actuating arm 13 and increase the inclination angle. The actuating arm 13 then inclines toward the 'b' direction fulcruming an axis P4 while the interlocking member 5 makes a parallel movement to the conveyor platform 2 in the 'c' direction opposing to the direction of the conveyor platform 2 movement. When the conveyor platform 2 makes displacement up to the limited position toward the front, the actuating arm 13, slipping out of the cam plate 12 by virtue of the cam surface 12c, returns to its vertical posture. Thus the interlocking member 5 returns to the front and the presser member 4 returns from a standing-by posture to a colliding posture but solid substances can be moved forward in the distance the conveyor platform advanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved screen conveyor for separating and transporting solid substances from liquids.

[0002]

2. Description of the Related Art As a conveyor for separating a solid substance in a liquid treatment including a water treatment and transporting it to a predetermined place,
For example, a garbage transport conveyor is known. As shown in the schematic view of FIG. 11, this kitchen waste conveyer 30 is configured so that an endless chain 35 can be circulated along a screen below a screen formed by arranging bars 32 having an arbitrary cross-sectional shape in multiple rows. A scraper 34, which is arranged and whose length is set so that its tip projects above the bar 32, is connected to the chain 35, and the scraper 34 is provided with a gap 33 formed between adjacent bars 32 and 32. It is configured to pass through. The chain 35
Is always circulating in the same direction, so scraper 3
The solid substance caught on the sheet 4 is pushed by the scraper 34 on the bar 32 and is conveyed while sliding. At the front end of the conveyor 30 in the conveying direction, the upper end of the scraper 34 needs to sink below the surface of the bar 32 in order to remove the solid substance that has been caught on the scraper 34.
The scraper 34 is disengaged from 2 and moved, and the relationship is lost. Then, at the base end (entrance side) in the transport direction, the scraper 3 is again inserted into the gap 33 between the adjacent bars 32 and 32.
4 is inserted and the upper end of the bar 32 projects above the surface of the bar 32 to carry the above-mentioned conveyance. Because of the above configuration, there are the following problems. ． Since the solid substance is slid along the bar while being pushed by the scraper, the conveyance resistance due to the friction between the solid substance and the bar increases, and the conveyance efficiency deteriorates. Further, since the frictional conveyance is always performed on the bar, a force that tends to move to the side with less resistance acts on the bar, and the scraper is sandwiched by the bars displaced in the direction of narrowing the gap, which may further increase the frictional resistance. There is ． The gap between the bars is set narrow so that the liquid will flow down and the solid material will not easily fall, but the thickness of the scraper is limited to the width that can be moved in the gap,
If the conveyance resistance increases, the scraper may be bent or damaged. Therefore, a method of forming the gap between the bars on the transport inlet side in a taper shape with a gradually narrower width is conceivable. ． The scraper comes out of the gap between the bars at the front end in the conveying direction, and is inserted into the above gap again at the base end side. Or cause deformation of the bar. Therefore, it is possible to arrange a bar and a gap between the bars over the entire length of the endless chain to prevent the scraper from coming out of the gap. There is a drawback that substances cannot be discharged. ． It is necessary to speed up the chain to cope with the increase in the amount of conveyance, but since the solid substance is pushed by the scraper on the bar, spills occur, which is not effective. On the other hand, if the speed is too high, the solid substance will be caught in the bar, increasing the conveyance resistance and causing a conveyance problem.

[0003]

SUMMARY OF THE INVENTION The present invention was created in view of the above circumstances, and its main problem is to reduce the transfer resistance when transferring a solid substance and to reduce the gap between the bars. Another object of the present invention is to provide a highly reliable screen conveyor that can prevent clogging of the screen and can increase the transport amount.

[0004]

In order to solve the above-mentioned problems, in the invention of claim 1, there is provided a carrier table in which bars extending in the carrying direction are arranged in a plurality of rows and attached so as to be interlocked.
A reciprocating device is provided which is supported on the base and reciprocates the transport table back and forth along the transport direction. The reciprocating device is fitted into a gap formed between the bars and extends in the transport direction, and can be tilted back and forth. A presser member pivotally attached to the carriage is provided, and in conjunction with the forward movement of the carrier, the presser member is tilted forward from the abutting position so that the upper end of the presser member is tilted to a standby position in which it is submerged from the surface of the bar. When the carriage is displaced, the forward movement of the carriage is completed, or when the backward movement starts, the upper end of the pressing member protrudes from the surface of the bar to return to the abutting posture, and the tilting means for maintaining the abutting posture when the backward movement of the conveyor is performed. We are taking technical measures to establish it.

[0005]

The carrier table is repeatedly moved back and forth along the carrying direction by the driving of the reciprocating device. By the forward movement of the carrier, the tilting means is interlocked, and the pressing member fitted in the gap of the bar of the carrier is tilted forward from the abutting position in which it rises, and tilted to the standby position in which the upper end of the bar surface is retracted. Displace. When the forward movement is completed or the backward movement is started, the pressing member returns from the standby posture to the abutting posture by the tilting means, and is maintained in the abutting posture while the carrier is moving backward. This causes the carrier to return to the rear, but the movement of the solid substance placed on the bar of the carrier to the rear is restrained by the pressing member, and as a result, the carrier moves in the conveying direction by the distance advanced. You can move forward. Further, since the bar is arranged in a plurality of rows on the carrier table, the liquid in the introduced carrier flows down through the gap between the bars, and the solid substance remains on the bar, so that solid / liquid separation can be performed. .. Since the pressing member tilts forward when the carrier is advanced, the moving directions of the solid substance and the pressing member are the same, and the solid substance and the pressing member are not caught. Further, if a scooping surface is formed on the front end edge of the pressing member, the solid substance clogged in the gap between the bars can be lifted and cleaned on the bar by the backward force acting on the solid substance.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment in which the screen conveyor of the present invention is applied to a garbage conveyor will be described below with reference to the drawings. Kitchen waste conveyor 1 of the first embodiment
Is a bar 2a having a cross section set in an arbitrary shape, such as a corner, a circle, or an inverted triangle, arranged in a multi-row in a required width from the inlet to the outlet of the garbage flowing by the water flow. It is integrally attached to the frame 2b to form a screen-shaped carrier 2 that allows water to seep out. The carrier table 2 is supported by a plurality of support rollers 8 rotatably supported by a conveyor case 9 so as to be able to roll in parallel in the front-rear direction. The carrier table 2 is connected to a motor-driven crankshaft 7, which is shown as an example of a reciprocating means, and horizontally reciprocates back and forth along the carrying direction by the rotation of the crankshaft 7.

Next, a gap 3 is formed between the bars of the carrier 2 along the extending direction thereof. In the illustrated example, the gap 3 is formed in a groove shape that is continuous along the extending direction, but in the present invention, when the pressing member described later is sunk from the bar surface to the standby position, it is received. It suffices that the gap is large enough to be provided, and the gap may be intermittently provided corresponding to each pressing member.

Scraper-like pressing members 4 are fitted and inserted in the gaps 3 along the longitudinal direction of the carrier table 2, and a plurality of scraper-like pressing members 4 are arranged at substantially equal intervals along the extending direction of the bar 2a. .. Each holding member 4 has a conveyor case 9 in its middle position.
It is pivotally attached via a pivot P1 fixed to the side. Further, each pressing member 4 is pivotally attached at its lower end side to a connecting member 5 extending in parallel with the bar 2a by a pivot P2.

The pressing member 4 is interlocked with the carrier 2 using a cam mechanism shown as an example of a tilting means. In this embodiment, the cam mechanism includes a cam case 11 that is integrally connected to and interlocks with the carrier table 2, and a pivot P fixed to the cam case 11.
3, a cam plate 12 pivotally attached to the cam plate 3, and an actuating arm 13 guided by the cam plate 12 and connected to the connecting member 5.
It consists of

Here, the cam plate 12 is pivotally attached to the cam case 11 on the rear side, and a cam surface is formed on the upper surface. The cam plate 12 is urged by a spring (not shown) so that its front end contacts the bottom surface of the cam case 11.
The cam surface has a first cam surface portion 12a that gradually inclines upward from the lower end of the cam case 11 at the front end, a second cam surface portion 12b formed on a substantially horizontal plane, and a third curved surface formed on a corner formed on the base end side. The cam surface portion 12c. Further, the lower surface of the cam plate 12 returning from the third cam surface portion 12c to the first cam surface portion 12a has a rear side higher than the bottom surface of the cam case 12,
The roller 14 described later is at a position where it can be inserted, and gradually inclines downward toward the front.

Next, the operating arm 13 has a yoke 13a whose lower part is bifurcated, and the roller 13 which rolls with the cam surface is pivotally supported by the yoke 13a. The actuating arm 13 is pivotally attached at its midway position by a pivot P4 fixed to the conveyor case 9 side, and has a vertically extending elongated hole 15 at its upper end. A pivot P5 provided on the connecting member 5 is slidably connected to the elongated hole 15. The actuating arm 13 is urged by a spring (not shown) to a vertically standing position. In addition, the yoke 13
A space 13b having a width that allows the cam plate 12 to be inserted is formed above the roller 14 between a and the roller 14.

With the above-mentioned structure, the conveyance base 2 reciprocates back and forth in parallel by the rotation of the crankshaft 7 driven by the motor. In the case of the illustrated example, first, the carrier 2 is
It is displaced in the front direction a of the transport direction. The cam case and the cam plate pivotally mounted on the cam case are the same
It is displaced in the direction (see Fig. 2). As a result, the cam plate 12
The first cam surface portion 12a pushes the roller 14 of the operation arm 13 to increase the inclination angle.

The actuating arm 13 tilts in the clockwise direction b in the figure while increasing the repulsive return force with the pivot P4 as a fulcrum. The heightwise displacement of the actuating arm 13 when it is tilted is absorbed by the elongated hole 15, and the connecting member 5 moves (retracts) in parallel to the direction c, which is opposite to the moving direction of the carrier 2.
By the movement of the connecting member 5, the position of the pivot P2 at the lower end of the pressing member 4 is also interlocked and displaced, so that the upper end of the pressing member 4 moves forward from the abutting posture in which the upper end of the pressing member 4 is the fulcrum. It inclines in the d direction toward which it tilts, and tilts to a standby posture in which it is submerged from the surface of the bar 2a.

In this embodiment, since the operating arm 13 can be displaced to the above position by the first cam surface portion 12a, the second cam surface 12b is set to be substantially horizontal so as to maintain the inclined posture. .. Then, when the carrier 2 is displaced to the position where the forward movement is completed (limit), the operating arm 13 is disengaged from the cam plate 12 at the third cam surface 12c and returns to the vertical posture by the repulsive biasing force of the spring (see FIG. 3). ). As a result, the connecting member 5 rapidly returns to the front and the pressing member 4 returns from the standby position to the abutting position. In this state, the carriage 2 then begins to move backward in the direction e by the operation of the crankshaft 7.

Therefore, the solid substance placed on the carrier 2 and separated from the liquid such as water is applied with a backward force in conjunction with the carrier 2, but the holding member held in the abutting posture. Since the solid substance is restrained by 4 and maintained at the current position, the solid substance has been transported forward relative to the transport base 2. When the transport table 2 is retracted, the cam plate 12 is also retracted in conjunction with this, but the operating arm 13 passes the cam plate 12 through the gap 13b between the roller 14 and the yoke 13a, and the roller 14 causes the cam plate 12 to move. The fourth cam surface 12d of 12 is pushed up against the urging force, the cam plate 12 is pulled out, and the cam plate 12 is returned to the reference position in FIG.

As a result, it becomes possible to move the solid substance forward by the forward distance of the carrier. Also,
Since the tilting direction d of the pressing member 4 and the advancing direction a of the carrier 2 are made to coincide with each other, the solid substance and the pressing member 4 can be prevented from being meshed with each other. Further, even when the transport table 2 is retracted, as shown in FIG. 4, the tip end of the pressing member 4 is gradually inclined upward and the width of the side surface is inclined rearward and becomes narrower.
By setting to, it becomes possible to guide and clean the solid substance that has fallen into the gap 3 between the bars 2a and is clogged up so as to be lifted above the bar 2a.

Next, the screen conveyor of the second embodiment shown in FIG. 5 will be described. This screen conveyor 1'is
Similar to the above-described embodiment, it has a carrier table 2 which reciprocates forward and backward by a crankshaft 7 driven by a motor, and a holding member 4 which is fitted into a gap 3 between bars 2a constituting the carrier table 2. .. Then, the lower end of the pressing member 4 has the support base 6 at both ends.
The fixed connecting member 20 fixed in between is pivotally attached by a pivot axis P6, and the pressing members 4 at both ends are pivotally attached to the support base 6 by a pivot axis P6 '. The holding member 4 is pivotally attached to a horizontally extending movable connecting member 25 by a pivot P7 at an intermediate position.
Further, the roller 24 is coaxially formed on the pivot P7 'at the midway position of one pressing member 4'.

On the other hand, as shown in FIGS. 6 to 10, a floating cam plate 22 for guiding the roller 24 is pivotally attached to the cam case 21 formed integrally with the carrying table 2 at its tip. The floating cam plate 22 is provided so as to be swingable back and forth, and the first cam surface 2 is gradually inclined downward toward the rear.
2a, a second cam surface 22b that is connected to the first cam surface 22a and extends along the bottom surface side, a third cam surface 22c that returns from the rear end to the upper surface and gradually inclines upward toward the front, and a third cam surface The fourth cam surface 22d is connected to the second cam surface 22c and is connected to the first cam surface 22a. Other configurations are the same as those in the above-described embodiment, and thus the description thereof is omitted.

With the above construction, when the carriage 2 advances, the cam case 21 also advances in the same a'direction, the front end of the floating cam plate 22 abuts against the roller 24, and the roller 24 is moved to the first position. It is pushed down by the cam surface 22a (see FIG. 7). As a result, the movable connecting member 25 retracts in the b ′ direction, all the pressing members 4 tilt in the c ′ direction, and is displaced from the vertical abutting posture to the standby posture in which the surface of the carrier 2 is submerged. Then, the roller 24 pushes up the floating cam plate 22 by the second cam surface 22b and passes to the rear end (see FIG. 8).

Then, at the position where the forward movement of the carriage 2 is completed,
The roller 24 goes over the corner of the second cam surface 22b to the third cam surface 22c. Then, when the carriage 2 starts to move backward, it immediately moves upward along the third cam surface 22c, the roller 24 tilts in the opposite direction to the above, and displaces the pressing member 4 to an upright posture (FIG. 9). And
The roller 24 returns to the reference position of FIG. 6 through the fourth cam surface 22d while tilting the floating cam plate as shown in FIG. With this, if the structure is simple, the solid substance can be separated from the liquid such as water and can be conveyed forward as in the above. Further, the cam mechanism is not limited to the configuration of each of the above-mentioned embodiments, and the design can be changed appropriately. Further, as the tilting means for tilting the pressing member, instead of the cam mechanism, a link mechanism or other actuating mechanism which operates the pressing member in the same manner as the above may be used in conjunction with forward and backward movements of the carrier. Each pressing member may be linked together at once via a connecting member, or may be provided with tilting means individually and operated in synchronization.

[0021]

As described above, according to the present invention, since the engagement between the pressing member and the carrier is constant, the pressing member and the carrier are not damaged. Since the gap between the bars can be set to be narrow and constant, even a small substance can be conveyed and it is possible to prevent mixing with a liquid such as water due to dropping. Regardless of the amount of conveyance, it can be conveyed at a constant speed and work efficiency can be improved. Since the structure is simple and the conveyance resistance can be suppressed to a low level, the power is small.
Further, by forming the scooping surface on the pressing member, the gap between the bars is always cleaned, and the carrying resistance can be further reduced.

[Brief description of drawings]

FIG. 1 is a side view showing a conveyor according to a first embodiment of the present invention.

FIG. 2 is a side view when a carrier is advanced.

FIG. 3 is a side view when the forward movement of the carrier is completed.

FIG. 4 is a side view showing another embodiment of the pressing member.

FIG. 5 is a side view showing a conveyor according to a second embodiment.

From Figure 6

FIG. 10 is a side view showing a relationship between a roller and a floating cam plate.

FIG. 11 is a schematic view showing a conventional conveyor.

[Explanation of Codes] 1 Garbage Conveyor 1'Garbage Conveyor of Second Embodiment 2 Conveyor Table 3 Gap 4 Holding Member 5 Connecting Member 7 Crankshaft 9 Conveyor Case 11 Cam Case 12 Cam Plate 13 Working Arm 14 Roller 22 Floating Cam Plate 24 roller 25 movable connecting member

Claims (4)

[Claims] 1. A transfer table having bars extending in the transfer direction arranged in a plurality of rows and attached so as to be interlocked with each other, and a reciprocating device which is supported on a base and reciprocates the transfer table back and forth along the transfer direction. A pressing member that is fitted into a gap formed between the bars and extends in the transport direction, and is pivotally attached so as to be tiltable forward and backward; and in conjunction with the forward movement of the transport base, the pressing member is The upper end of the pressing member protrudes from the surface of the bar when it is tilted forward from the abutting position and the upper end of the pressing member is tilted and displaced to the standby position in which it sinks from the surface of the bar to complete the forward movement of the carrier or when backward movement starts. A screen conveyor, comprising: tilting means for returning to the abutting posture to stand up and maintaining the pressing member in the abutting posture when the carrier is moving backward. 2. The tilting means is composed of a cam mechanism, is provided so as to be interlocked with the carriage and has a cam surface, and a lower end provided with a roller that rolls along the cam surface. 2. An actuating arm pivotally attached to a position, the upper end of which is pivotally attached to a connecting member that connects the pressing members in series through an elongated hole having a margin in the height direction. Screen conveyor. 3. A cam plate whose tilting means comprises a cam mechanism, which is movably mounted on a carrier and has a cam surface, and a lower end of which is pivotally fixed at a fixed position and which is connected to each buffer member at an intermediate position. The screen conveyor according to claim 1, wherein the member is pivotally mounted, and the buffer member or the connecting member is provided with a roller that rolls along the cam surface. 4. The screen conveyor according to claim 1, wherein the front end edge of the pressing member is a scooping surface that gradually inclines rearward upward from a position corresponding to the gap.