JPH09327821A - Volume reduction apparatus for plastic waste - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and certainly bundle the bale of plastic bottle waste. SOLUTION: An opening and closing door 35 is displaced to a position opening a discharge gate 31 to bring a guide surface 37 into contact with the upper surface of the bale of the plastic bottle waste 10 discharged from the discharge gate 31 and displaced to a position where the bale is compressed by a predetermined quantity by the guide surface 37 when the bale of the plastic bottle waste 10 is bundled by a bundling machine 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic waste volume reducing device for compressing and reducing the volume of plastic waste such as PET bottles, and more particularly to binding a plastic waste discharged from a discharge gate. It relates to a structure for easy operation.

[0002]

2. Description of the Related Art As a conventional volume reducing apparatus for plastic waste, there is an apparatus for compressing a plastic bottle waste 40 by a compression pusher 42 in a volume reducing section 41, as shown in FIGS. The veil of the plastic bottle waste 40 is discharged from the volume reducing unit 41 by the discharge pusher 43.
It is discharged to a predetermined binding position through the discharge gate 44, and is bound by the binding machine 45 using a band (not shown). A discharge door 46 is provided on the discharge gate 44 so as to be vertically movable in FIG. The discharge door 46 is moved up and down in FIG. 6 by the hydraulic cylinder 47 to open or close the discharge gate 44.

Generally, plastic bottle waste 40
Has a wider elastic deformation range than metal cans and has a strong springback that tends to return to its original shape. In particular, when a large number of plastic bottle wastes 40 are stacked and compressed, the individual plastic bottle wastes 40 have a dispersed pressure, and the pressure applied to each plastic bottle waste 40 is relatively small. Therefore, when discharged as a veil (lump) from the discharge gate 44, there is a risk that the entire veil expands and the veil collapses as each plastic bottle waste 40 tries to return to its original shape.

That is, at the end of compression in the volume reducing unit 41,
The bail is compressed to a height lower than the opening height of the discharge gate 44 and is in a sufficiently tight state. However, when the plastic bottle waste 40 is discharged from the discharge gate 44 and no pressure is applied, the individual plastic bottle waste 40 expands due to the spring back, so that the veil becomes in a poorly tight state. Even if the bale is bound in such a state, the band becomes loose, so that the bale having a stable outer shape cannot be formed.

Therefore, in the conventional volume reducing apparatus shown in FIGS. 5 and 6, an auxiliary pressing plate 48 is provided in front of the bundling position, and the bale of the plastic bottle waste 40 to be bound is pressed by the auxiliary pressing plate 48. The veil is secured tightly. The auxiliary pressing plate 48 is a hydraulic cylinder 49.
6 is moved up and down in FIG. 6 and presses the bail as it descends.

There is also a volume-reducing section 41 in which an excessive pressure exceeding the pressure originally required for compressing the plastic bottle waste 40 is applied to ensure sufficient tightening of the bale after discharge.

[0007] Further, when the plastic bottle waste 40 is bound by the binding machine 45, there is also one that secures a sufficient bale tightness by increasing the tightening force of the bale of the plastic bottle waste 40 by the band.

Further, as shown in FIG. 7, a tunnel-shaped enclosure member 50 is used instead of the auxiliary pressing plate 48 and the hydraulic cylinder 49.
Some are provided with That is, the entire discharge path from the discharge gate to the front of the bundling position is covered with the enclosing member 50, and the bale of the discharged plastic bottle waste 40 is enclosed by the enclosing member 5.
Passing through 0 prevents bale expansion.

[0009]

However, in any of the above-mentioned plastic waste volume reducing devices, the structure becomes complicated,
There is a problem that the number of parts and the number of assembling steps are unavoidably increased, a great amount of labor and time are required for assembling and maintaining the apparatus, and the cost is increased. Further, in the volume reducing device shown in FIGS. 5 and 6, the discharge door 46 and the auxiliary pressing plate 48 are provided.
It is necessary to operate the hydraulic cylinders 47 and 49 for respectively displacing the hydraulic cylinders at required timings, which complicates control of the hydraulic system. Further, if the plastic bottle waste 40 is applied with an excessive pressure in the volume reducing unit 41, expansion of the bale after discharge can be suppressed, but the plastic bottle wastes 40 are firmly fixed to each other, so that the plastic bottle waste 40 is regenerated. There has been a problem that the work of separating each plastic bottle waste 40 in the process becomes extremely difficult.

The present invention makes it possible to stabilize the outer shape of the bale of the plastic waste discharged from the discharge gate, thereby facilitating the binding of the plastic waste after discharge to the plastic waste. The purpose of the present invention is to provide a volume reducing device.

[0011]

The above object of the present invention is to reduce the volume of plastic waste by compressing the plastic waste in a predetermined direction, and to discharge the plastic waste volume-reduced in the volume reduction section. Through the discharge gate in a predetermined direction, a binding means for binding the plastic waste discharged through the discharge gate, an open / close door that opens or closes the discharge gate according to the displacement, and a discharge to the open / close door A guide surface that is provided with a predetermined length along the direction, and contacts the surface of the plastic waste discharged from the discharge gate along the discharge direction when the opening / closing door is displaced to the position where the discharge gate is opened. It is achieved by a plastic waste volume reducing device.

The opening / closing door is preferably displaced to a position where the plastic waste is compressed by a predetermined amount by the guide surface when the plastic waste is bound by the binding means.

[0013]

In the plastic waste volume reducing device according to the present invention, the plastic waste volume-reduced in the volume-reducing portion is discharged by the discharge means with the opening / closing door being displaced to the position where the discharge gate is opened. It is discharged in a predetermined direction via. At this time, the guide surface provided on the opening / closing door is in contact with the surface along the discharge direction of the plastic waste.

Further, in the plastic waste volume reducing apparatus according to the present invention, the plastic waste volume-reduced in the volume-reducing section is discharged by the discharging means in a state where the opening / closing door is displaced to the position where the discharge gate is opened. It is discharged in a predetermined direction through the gate. At this time, the guide surface provided on the opening / closing door is in contact with the surface along the discharge direction of the plastic waste. The plastic waste is then bound by the binding means. At this time, the opening / closing door is displaced to a position where the guide surface compresses the plastic waste by a predetermined amount.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a schematic perspective view showing a plastic waste volume reducing apparatus according to an embodiment of the present invention, and FIG. 2 is a schematic side view of the volume reducing apparatus of FIG. 3 is a schematic perspective view showing the state of the opening / closing door of the volume reducing device of FIG. 1 when the veil is discharged, and FIG. 4 is a schematic side view showing the state of bale binding of the opening / closing door of the volume reducing device of FIG. Is.

In FIGS. 1 and 2, the plastic bottle waste 10 is compressed and reduced in volume by the volume reducing unit 20, and is discharged to a predetermined binding position A by the discharge mechanism 30 through the discharge gate 31. It is bound by the binding machine 11 using the band 12 (FIG. 4) and the like.

The volume reducing section 20 compresses the plastic bottle waste 10 charged in the volume reducing chamber 22 through a charging port 21 connected to a shooter (not shown) in a predetermined direction by a compression plate 23. Reduce the volume and make a veil. The compression plate 23 is driven by a compression hydraulic cylinder 24,
2 is moved in the vertical direction from the ascending position (the position indicated by the broken line in FIG. 2) to the descending position (the position indicated by the two-dot chain line in FIG. 2) for compressing the plastic bottle waste 10.
In the plastic bottle waste 10 that can be put into the volume reduction chamber 22 at one time, the height dimension of the bale formed (vertical dimension in FIG. 2) is small, so that the bale reaches a predetermined height. The plastic bottle waste 10 is repeatedly charged and compressed several times.

The discharging mechanism 30 opens the discharging gate 31 and moves the discharging pressing plate 32 leftward in FIG. 2 when the bale of the stacked plastic bottle wastes 10 reaches a predetermined height. As a result, the discharge mechanism 30 discharges the reduced volume veil of the plastic bottle waste 10 to the predetermined bundling position A (FIG. 3) via the discharge gate 31.

The discharge pressing plate 32 is driven by the discharge hydraulic cylinder 33 and moved in the left-right direction in FIG. 2 from the retracted position to the protruding position where the bale of the plastic bottle waste 10 is pressed and discharged. .

The discharge gate 31 is used for opening and closing the hydraulic cylinder 3.
It is opened or closed by an opening / closing door 35 which is moved up and down in FIG. That is, the opening / closing door 35 is fixed to the tip of the cylinder rod 36 of the opening / closing hydraulic cylinder 34, and opens or closes the discharge gate 31 according to the operation of the opening / closing hydraulic cylinder 34.

2 to 4, a guide surface 37 is provided at a lower end portion of the opening / closing door 35 in FIG. 2 with a predetermined length B along the discharging direction (right side in FIG. 2). Guide surface 37
3 is a bale of the plastic bottle waste 10 discharged from the discharge gate 31 in the state shown in FIG. 3 in which the opening / closing door 35 is displaced to the position where the discharge gate 31 is opened.
Abut on the upper middle surface. As a result, the guide surface 37 prevents the discharged bale from expanding upward in FIG. Further, the guide surface 37 is in the state shown in FIG. 4 in which the bale of the plastic bottle waste 10 is discharged to the predetermined bundling position A,
As the opening / closing door 35 is displaced downward in FIG. 4, the bale is compressed downward in FIG. 4 by a predetermined amount. As a result, the guide surface 37 is
The binding by the binding machine 11 is easy and reliable.

The operation of this embodiment will be described. Volume reduction unit 20
The veil of the plastic bottle waste 10 whose volume has been reduced in step 3 is discharged by the discharge mechanism 30 while the opening / closing door 35 is displaced to the position where the discharge gate 31 is opened.
It is discharged to a predetermined binding position A via 1. At this time, as shown in FIG. 3, the guide surface 37 of the opening / closing door 35 is brought into contact with the upper surface of the bale of the plastic bottle waste 10 in FIG. As a result, the bale discharged is prevented from expanding upward in FIG.

At the bundling position A, the bale of the plastic bottle waste 10 is put into a band 12 by the bundling machine 11.
Etc. are bound together. At this time, the opening / closing door 35 is displaced by the guide surface 37 to a position where the plastic bottle waste 10 is compressed by a predetermined amount. As a result, the veil of the plastic bottle waste 10 is compressed by a predetermined amount downward in FIG. 4, and is easily and surely bound by the binding machine 11.

When bale of the plastic bottle waste 10 is bound at several places, the opening / closing door 35 is opened to the position where the discharge gate 31 is opened each time bale is completed.
And the bale of the plastic bottle waste 10 is moved to the next binding position by the discharge mechanism 30. At the time of bundling the bail, as described above, the bail is compressed by the guide surface 37 of the opening / closing door 35 by a predetermined amount to facilitate the bundling by the bundling machine 11.

As described above, according to the above embodiment, the guide surface 37 provided on the opening / closing door 35 is discharged from the discharging gate 31 when the opening / closing door 35 is displaced to the position where the discharging gate 31 is opened. 2. Abut on the upper surface of the bale of the plastic bottle waste 10 in FIG. Therefore, the outer shape of the veil of the plastic bottle waste 10 discharged from the discharge gate 31 can be stabilized, and expansion or collapse of the veil after discharge can be reliably prevented. As a result, bale binding by the binding machine 11 can be performed easily and reliably. When the bale of the plastic bottle waste 10 is bound by the bundling machine 11, the opening / closing door 35 is displaced by the guide surface 37 to a position where the bale is compressed by a predetermined amount. As a result, the bale to be bound can be compressed downward in FIG.
The bale can be bound more easily and surely. Furthermore, an auxiliary pressing plate 48 (see FIG. 5) for pressing the bale of the plastic bottle waste 10 to be bound,
Further, since the hydraulic cylinder 49 (see FIG. 5) for operating the auxiliary pressing plate 48 and the like are unnecessary, the number of parts and the number of assembling steps can be reduced. This allows the assembly of the device,
Maintenance and control of the hydraulic system can be easily performed, and cost can be reduced.

[0026]

As described above, according to the present invention, when the opening / closing door is displaced to the position for opening the discharge gate,
A guide surface provided on the opening / closing door with a predetermined length along the discharge direction contacts a surface along the discharge direction of the plastic waste discharged from the discharge gate. Therefore, the outer shape of the bale of the plastic waste discharged from the discharge gate can be stabilized. As a result, the plastic waste can be easily and reliably bound by the binding means. Further, according to the present invention, when the opening / closing door is displaced to the position where the discharge gate is opened, the guide surface provided on the opening / closing door with a predetermined length along the discharge direction is a plastic waste discharged from the discharge gate. It comes into contact with the surface along the discharge direction of the object. Further, when the plastic waste is bound by the binding means, the opening / closing door is displaced by the guide surface to a position where the plastic waste is compressed by a predetermined amount. Therefore, the outer shape of the bale of the plastic waste discharged from the discharge gate can be stabilized. As a result, the plastic waste can be easily and reliably bound by the binding means.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a plastic waste volume reducing device according to an embodiment of the present invention.

FIG. 2 is a schematic side view of the volume reducing device of FIG.

FIG. 3 is a schematic perspective view showing a state when the opening and closing door of the volume reducing device of FIG. 1 is discharged.

FIG. 4 is a schematic side view showing a state of bale binding of the opening / closing door of the volume reducing device of FIG.

FIG. 5 is a schematic perspective view showing a conventional plastic waste volume reduction device.

6 is a schematic side view of the volume reducing device of FIG.

FIG. 7 is a schematic perspective view showing an opening / closing door and a binding machine of another example of the conventional plastic waste volume reducing apparatus.

[Explanation of symbols]

10 plastic waste (plastic bottle waste) 11 bundling means (bundling machine) 20 volume-reducing section 30 discharging means (discharging mechanism) 31 discharging gate 34 opening / closing hydraulic cylinder 35 opening / closing door 37 guide surface A binding position

Claims (2)

[Claims] 1. A volume reducing section for compressing plastic waste in a predetermined direction to reduce its volume, and a discharging means for discharging the plastic waste reduced in volume by the volume reducing section in a predetermined direction through a discharge gate. A bundling means for bundling the plastic waste discharged through the discharge gate, an opening / closing door that opens or closes the discharge gate according to the displacement, and a predetermined length along the discharging direction on the opening / closing door, A guide surface that abuts a surface along the discharge direction of the plastic waste discharged from the discharge gate when the opening / closing door is displaced to the position where the discharge gate is opened. Device. 2. The plastic according to claim 1, wherein the opening / closing door is displaced to a position where the plastic waste is compressed by a predetermined amount by the guide surface when the plastic waste is bound by the binding means. Waste volume reduction device.