JPH10235498A - Pet bottle volume reducing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent PET bottle from being caught between a pressing board and the upper edge of a charging inlet of a squeezing device when a group of PET bottles is squeezed into a volume reducing chamber by a squeezing device. SOLUTION: In a PET bottle volume reducing machine in which a group of PET bottles in a charging chamber 4 is squeezed from the charging inlet 21 of a volume reducing chamber 2 by the squeezing device 5 and a group of the PET bottles B accomodated in the volume reducing chamber 2 is compressed by a compressing unit 3, a cutting blade 81 of one side is fixed to the upper edge 22 of the charging inlet 21 and, on the other side, a cutting blade 82 of another side is fixed to the front upper end of a pressing board 52 of the squeezing device 5. When the pressing board 52 advances to the position to close the charging inlet 21, the PET bottle A which is going to be caught between the front upper end of the pressing board 52 and the upper brim 22 of the charging inlet 21 is cut by both of the cutting blades 81, 82, and thus the PET bottle A does not remain being caught by the upper end of the presing board 52 and the upper brim 22 of the charging inlet 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PET bottle reducing machine for compressing a large number of empty PET bottles into small chunks.

[0002]

2. Description of the Related Art Empty PET bottles are transported to a reprocessing plant and reused as raw materials. However, if they are used as they are (with air inside), their handling is troublesome due to the large volume and the transportation cost. Is high.

[0003] By the way, conventionally, a PET bottle volume reducing machine for compressing PET bottles into small chunks has already been developed. As shown in FIG. 8, this conventional PET bottle volume reducing machine puts a large number of PET bottles A into a loading chamber 4 and reduces a group of PET bottles B in the loading chamber 4 from a loading port 21 by a pushing device 5. It is pushed into the storage chamber 2, and the group of PET bottles stored in the storage chamber 2 is compressed from above by the compression device 3, and the compressed PET bottle block C is extruded from the outlet 23 at the bottom of the storage chamber 2. The apparatus 7 is configured to be able to discharge to the outside.

[0004] The inlet 21 has a rectangular shape and is opened laterally on the side surface near the upper part of the volume reduction chamber 2.

[0005] The pushing device 5 comprises a hydraulic cylinder 51 and a pushing plate 5.
2 has a structure of moving forward and backward in the horizontal direction. The push plate 52 has a rectangular front plate 53 having substantially the same shape and size as the insertion port 21 and an upper surface plate 54 for receiving the plastic bottle A remaining in the insertion chamber 4 at the time of forward movement. When the hydraulic cylinder 51 is in a contracted state, the push plate 52 is retracted as shown by a solid line in FIG.
When the hydraulic cylinder 51 is extended, the push plate 52 is moved forward and the PET bottle A at a position in front of the front plate 53 is accommodated.
(Pet bottle group B) can be pushed into the volume reduction chamber 2 from the input port 21. When the push plate 52 is at the most advanced position, the front plate closes the insertion port 21 as shown by a chain line (reference numeral 52 '), and the remaining PET bottle A is prevented from dropping on the top plate. Has become.

[0006] The compression device 3 is configured such that the pressing plate 32 is
1, a structure that moves up and down in the vertical direction is adopted. When the hydraulic cylinder 31 is in the contracted state, the pressing plate 32 is connected to the input port 21 as shown by the solid line.
When the hydraulic cylinder 31 is extended, the push plate 32 is moved downward to compress the PET bottle group deposited on the bottom of the volume reduction chamber 2. The extension operation of the hydraulic cylinder 31 of the compression device 3 is as follows.
In order to prevent the PET bottle A on the loading chamber 4 side from dropping into the volume reduction chamber 2, the push plate 52 on the pushing device 5 side is connected to the loading port 2.
1 is closed (the state of reference numeral 52 ').

The outlet 23 is formed on the side surface at the bottom of the volume reduction chamber 2, and is closed by the lid plate 62 when the PET bottle is compressed. This lid plate 62
Can be opened and closed by opening and closing means (for example, a hydraulic cylinder) not shown.

The extruder 7 is provided at the bottom of the volume reduction chamber 2 at a position facing the discharge port 23. This extruder 7
The hydraulic cylinder 71 has a structure in which the push plate 72 is moved forward and backward in the horizontal direction. In addition, the extrusion device 7
In the contracted state of the hydraulic cylinder 71, the push plate 72 (front plate)
Are waiting at the same position as the side surface of the volume reduction chamber 2.

The conventional PET bottle volume reducer shown in FIG. 8 operates as follows. First, the pressing plate 32 of the compression device 3
Moves upward and the push plate 52 of the pushing device 5 is retracted,
The PET bottle A thrown into the throwing chamber 4 is dropped and stored in front of the front plate 53 of the pushing device 5. When the hydraulic cylinder 51 of the pushing device 5 extends, the PET bottle group B located in front of the front plate 53 is pushed into the volume reduction chamber 2 from the inlet 21 and is deposited on the bottom of the volume reduction chamber 2. Next, with the push plate 52 (front plate 53) of the pushing device 5 closing the inlet 21 as shown by reference numeral 52 ', the hydraulic cylinder 31 of the compression device 3 is extended, and the push plate 32 becomes the reference numeral 32'. To move down to compress the PET bottle group at the bottom of the volume reduction chamber. Subsequently, the hydraulic cylinder 31 of the compression device 3 is reduced, and the push plate 32 is moved up to the original standby position. The hydraulic cylinder 51 of the push device 5 is reduced, and the next PET bottle group B is moved forward of the front plate 53. And the hydraulic cylinder 51 of the pushing device 5
Is extended to deposit the next group of PET bottles B from the inlet 21 onto the previously compressed lump of plastic bottles. → The hydraulic cylinder 31 of the compression device 3 is extended to perform the second compression. In a similar manner, a predetermined amount (for example, about 15 kg) of the PET bottle lump C is obtained by performing the injection of the PET bottle group B by the pushing device 5 and the compression operation by the compression device 3 several times (4 to 5 times in total). Can be molded into The PET bottle lump C is, for example, 600 mm long, 400 mm wide and 3 mm high.
It is formed into a rectangular parallelepiped shape of about 00 mm. Then, the push plate 32 of the compression device 3 moves upward → the cover plate 62 is opened (reference numeral 6).
2 ′) → The hydraulic cylinder 71 of the extruding device 7 is extended, and the plastic bottle lump C is discharged to the outside from the discharge port 23 by the pressing plate 72 → The pressing plate 72 of the extruding device 7 retreats to the original standby position → When the lid plate 62 is returned to the closed position, one cycle ends.

By the way, in the conventional PET bottle volume reducing machine shown in FIG. 8, as shown in FIG.
2, the PET bottle A is loaded into the volume reduction chamber 2, and the compression device 3 is compressed while the loading port 21 is closed by the front plate 53. That is, when the push plate 32 of the compression device 3 is moved downward, the PET bottle A in the charging chamber 4 is prevented from entering the volume reduction chamber 2 from the charging port 21. At the time when the pushing device 5 performs the pushing operation, as shown in FIG. 8, the plastic bottle A is housed in the charging chamber 4 above the height position of the upper surface plate 54, and the pushing plate of the pushing device 5 When the front plate 52 (front plate 53) has advanced to a position where the inlet 21 is closed, the upper end 53a of the front plate 53 and the upper edge 22 of the inlet 21 as shown by reference numeral A 'in FIG. PET bottles may be pinched.

[0011]

However, the state in which the plastic bottle A is sandwiched between the upper end portion 53a of the front plate 53 and the upper edge portion 22 of the charging port 21 as shown by reference numeral A 'in FIG. When the push plate 32 of the compression device 3 is moved downward, the portion Aa 'of the plastic bottle A' sandwiched between the volume reduction chamber and the push plate 32 is pushed.
2 will be crushed. At that time, the pressing force of the pressing device 32, the pressing device 52 of the pressing device 5, the input port 2
When an unnatural force is applied to the upper edge 22 and the like and the PET bottle A 'is repeatedly pinched in the same place, those members (32, 52, 22 etc.) are easily damaged or deformed. . Therefore, the conventional PET bottle volume reducing machine shown in FIG. 8 has a problem that the durability is inferior due to the above-mentioned clogging phenomenon of the PET bottle A ′. Also, in this conventional PET bottle volume reducing machine, there is a possibility that the PET bottle A 'may not be removed while being clogged between the upper end portion 53a of the front plate 53 and the upper edge portion 22 of the inlet 21 during operation. In this case, it was necessary to stop the operation and remove the clogged PET bottle A '.

The present invention has been made in view of the above-mentioned problems of the conventional PET bottle volume reducing machine, and when the push plate of the pushing device closes the inlet, the upper end of the front surface of the push plate and the upper edge of the inlet. The purpose of this is to prevent a plastic bottle from being left between them.

[0013]

The present invention has the following structure as means for solving the above-mentioned problems.

That is, the PET bottle volume reducing machine of the present invention is:
An injection chamber for a PET bottle is provided on the outer surface near the upper part of the volume reduction chamber facing in the vertical direction, and a group of PET bottles in the input chamber is pushed into the volume reduction chamber from an input port formed on a side surface of the volume reduction chamber by a pushing device. The PET bottle group housed in the reduced volume room is configured to be compressed by a compression device.

The input port is usually opened in a rectangular shape, but can be opened in a circular shape or any other suitable shape.

The pushing device has a push plate having substantially the same shape and the same size as the input port, and a drive device for moving the push plate horizontally between a retracted position and a forward position for closing the input port. ing. A telescopic cylinder (for example, a hydraulic cylinder) can be used as a driving device of the pushing device.

Further, in the PET bottle volume reducing machine of the present invention,
One cutting blade is attached to the upper edge of the inlet, and the other cutting blade is attached to the upper end of the front surface of the push plate of the pushing device. When the push plate of the pushing device has advanced to the most advanced position (that is, the position for closing the loading port), the two cutting blades are disposed between the upper end of the front surface of the pushing plate and the upper edge of the loading port. It is designed to cut bottles. When the PET bottle is cut by the two cutting blades, one of the cut pieces falls into the volume reduction chamber, and the other cut piece remains on the charging chamber side. Therefore, when the push plate of the pushing device advances to the loading port closing position, the PET bottle does not remain sandwiched between the upper end of the pushing plate and the upper edge of the loading port, and the compression operation by the compression device is performed. Does not cause any trouble.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 1 to 6, the PET bottle volume reducing machine according to this embodiment is mounted on a machine base 1, on a volume reducing chamber 2 of a PET bottle group B, and on an outer surface of the volume reducing chamber 2 near the top. The opening and closing of the loading chamber 4 for the PET bottle A, the pushing device 5 for pushing the PET bottle group B in the loading chamber 4 into the volume reduction chamber 2, and the discharge port 23 provided on the bottom side surface of the volume reduction chamber 2. The shutter device 6, the compression device 3 for compressing the PET bottle group B deposited on the bottom in the volume reduction chamber 2 from above, and the PET bottle lump C compressed on the bottom in the volume reduction chamber 2 An extruding device 7 for extruding from the outlet 23, and a pushing plate 52 of the pushing device 5 when the pushing device 5 moves forward.
A cutting device 8 for cutting a plastic bottle A sandwiched between the container and an upper edge 22 of an input port 21 provided on a side surface of the volume reduction chamber 2;
It is provided with a binding machine 9 for binding the plastic bottle lump C discharged from the discharge port 23 and a control panel 10 for controlling each operation of the plastic bottle volume reducing machine. In this embodiment, hydraulic cylinders 31, 51, 61, and 71 are employed as power sources for various operating devices (3, 5, 6, 7), and each hydraulic cylinder is driven by a hydraulic motor 11 respectively. The operating oil is supplied from a hydraulic pump 12 to be operated.

The volume reduction chamber 2 is surrounded by a square side plate 25 and a bottom plate 26 in plan view. The volume reduction chamber 2 of this embodiment has a size (inner diameter) of, for example, 6 in a plan view.
It is formed in a size of about 00 mm × 400 mm and has an appropriate height in the vertical direction. On the side face near the upper part of the volume reduction chamber 2, an input port 21 which is continuous with the input chamber 4 is formed. In this embodiment, the input port 21 has a rectangular shape and opens horizontally.

The pushing device 5 is composed of a hydraulic cylinder 51 and a push plate 5.
2 is used. Push plate 5
2 is a rectangular front plate 5 having substantially the same shape and size as the input port 21.
3 and an upper surface plate 54 for receiving the plastic bottle A remaining in the charging chamber 4 at the time of forward movement. In addition, this push plate 5
Numeral 2 is adapted to be moved in the horizontal direction toward the charging port 21 at the bottom of the charging chamber 4.

When the hydraulic cylinder 51 is in a contracted state, the push plate 52 is retracted and the PET bottle group B in the loading chamber 4 is moved forward of the front plate 53 as shown in FIG.
Can be dropped and stored.
When the PET bottle 1 is extended, the push plate 52 is moved forward as shown in FIG.
(Pet bottle group B) can be pushed into the volume reduction chamber 2 from the input port 21. In addition, as shown in FIG. 4, when the push plate 52 is in the most advanced state, the front plate 53 is
And the top plate 54 prevents the remaining plastic bottle A in the charging chamber 4 from dropping.

The compression device 3 is configured such that the pressing plate 32 is
1, a structure that moves up and down in the vertical direction is adopted. In the compression device 3, when the hydraulic cylinder 31 is in the contracted state, as shown in FIG. 2 and FIG.
As shown in FIG. 5, the push plate 32 can be moved down to the vicinity of the bottom of the volume reduction chamber 2.

The pressure gauge 16 (FIGS. 2 and 5) is provided in the extension side hydraulic circuit 38 of the hydraulic cylinder 31 of the compression device 3. The pressure gauge 16 issues an extension operation stop signal to the hydraulic cylinder 31 of the compression device 3. During the compression operation of the compression device 3, the pressure in the extension side hydraulic circuit 38 of the hydraulic cylinder 31 reaches a predetermined pressure or more. Then, the pressure gauge 16
From an ON signal. That is, as shown in FIG. 5, when the push plate 32 of the compression device 3 descends to the vicinity of the lowermost movement position, the inside of the extension side hydraulic circuit 38 becomes high pressure due to the reaction force from the compressed PET bottle group B. When the pressure reaches a predetermined pressure set by the pressure gauge 16, the pressure gauge 16 issues a detection signal. When the pressure gauge 16 issues an ON signal, the signal from the control panel 10 controls the electromagnetic switching valve 13 to stop the extension operation of the hydraulic cylinder 31 of the compression device 3. When the extension operation of the hydraulic cylinder 31 is stopped, the hydraulic cylinder 3
1 remains in the extended state. Further, a signal for reducing the hydraulic cylinder 31 is transmitted from the control panel 10 after a predetermined timer (for example, three seconds) from the transmission of the extension operation stop signal.

The pressing plate 32 of the compression device 3 is
It has a substrate 33 fixed to the tip of one rod, and a movable plate 34 that can move up and down in a small range with respect to the substrate 33 on the lower surface side of the substrate 33. A guide side plate 35 having a predetermined length is attached to an outer peripheral edge of the movable plate 34 so as to face upward. A large number of needles 36, 36.
・ Mounted downward. These needles 36, 36
Is for making a hole in the PET bottle A and discharging the liquid remaining in the bottle to the outside when the PET bottle group B in the volume reduction chamber 2 is compressed. Also, between the substrate 33 and the movable plate 34, the springs 37, 37,.
FIG. 6) is attached. When the pressing plate 32 is in the free state, the movable plate 34 is attached to the substrate 33 by the springs 3.
When the needles 36 are urged downward and the tips of the needles 36, 36,... Enter below the lower surface of the movable plate 34, and when pressure is applied to the movable plate 34 from below, each of the needles 36, 36. The spring 37 is compressed so that the movable plate 34 moves up with respect to the substrate 33, and the tips of the needles 36, 36... Protrude below the lower surface of the movable plate 34. It is to be noted that small holes are formed in the bottom plate 26 of the volume reduction chamber 2 at positions corresponding to the respective needles 36, 36,... It is preferable that the liquid discharged from the bottle be allowed to flow out of the machine base 1 through the small hole.

At a predetermined height position of the side plate 25 of the volume reduction chamber 2,
As shown in FIGS. 2 and 5, a detector (proximity switch) 15 for detecting the guide side plate 35 of the compression device side push plate 32 is attached. The detector 15 is turned ON when the guide side plate 35 corresponds to the front surface thereof, while the guide side plate 35 does not correspond to the front surface of the detector (the guide side plate 35 has dropped to the position shown by the solid line in FIG. 5). O in state)
It becomes FF. The ON signal from the detector 15 cooperates with the ON signal from the pressure gauge 16 to detect that a predetermined amount of the PET bottle lump C has been compressed in the volume reduction chamber 2 (see FIG. 7). (Full detection). The function after the detection of fullness by the detector 15 and the pressure gauge 16 will be described later.

At the bottom of the volume reduction chamber 2, a discharge port 23 for discharging a plastic bottle lump C formed to a predetermined size is formed. The outlet 23 is opened and closed by the shutter device 6. The shutter device 6 includes a cover plate 62 for opening and closing the discharge port 23 and a hydraulic cylinder 61 for operating the cover plate 62 up and down. The shutter device 6 keeps the lid plate 62 in the downwardly moving closed state during the compression operation of the PET bottle, and raises the lid plate 62 based on a one-cycle end signal (described later) from the control panel 10. The operation is released (the hydraulic cylinder 61 is reduced).

The extruder 7 is provided at the bottom of the volume reduction chamber 2 at a position facing the discharge port 23. This extruder 7
The hydraulic cylinder 71 has a structure in which the push plate 72 is moved forward and backward in the horizontal direction. In this embodiment, the hydraulic cylinder 71 of the pushing device 7 is extended in three stages. As shown in FIG. 2, the pushing device 7 pushes the push plate 7 when the hydraulic cylinder 71 is fully contracted.
2 (front panel) stands by at the same position as the side panel 25 of the volume reduction chamber 2,
PET extruded mass C to the position of the code C ₁ of compacting chamber bottom during the first stage extension of the hydraulic cylinder 71, reference numerals the PET mass C the time the second-stage extension of the hydraulic cylinder 71 C
Extrusion to _second position, so as to push the bottles mass C to the position of the code C ₃ at the time of the third-stage extension of the hydraulic cylinder 71.

The cutting device 8 cuts the PET bottle A sandwiched between the upper edge portion 22 of the insertion port 21 and the upper end corner of the front plate 53 of the pushing device 5 near the end of the pushing operation of the pushing device 5. Is what you do. This cutting device 8 is shown in FIG.
As shown in FIG. 4 and FIG. 4, one cutting blade 81 is attached to the upper edge portion 22 of the insertion port 21, while the front plate 53 of the pushing device 5 is attached.
And the other cutting blade 82 is attached to the upper end corner. As shown in FIG. 6, when the push plate 52 (front plate 53) of the pushing device 5 has advanced to the vicinity of the most advanced position (that is, the position for closing the input port 21), the cutting device 8 pushes The cutting blade 82 on the side of the plate 52 engages with the cutting blade 81 on the side of the inlet upper edge 22, and the upper end corner of the front plate 53 and the inlet 2
The plastic bottle A sandwiched between the upper edges 22 can be cut. When the PET bottle A is cut by the cutting blades 81 and 82, one cut piece Aa falls into the volume reduction chamber 2 and the other cut piece Ab is placed on the input chamber 4 side (of the upper surface plate 54). (Upper surface). Therefore, when the front plate 53 of the pushing device 5 advances to the position where the insertion port 21 is closed, the PET bottle A is still sandwiched between the push plate 52 (the front plate 53) and the upper edge 22 of the insertion port 21. Will not remain.

The binding machine 9 wraps a string 91 around the outer periphery of the plastic bottle lump C extruded from the outlet 23.
A general-purpose format is used.

As shown in FIG. 7, the control panel 10 controls each operation part (sequence control). The control method by the control panel 10 is based on the usage and operation of the PET bottle volume reducing machine of this embodiment. A description will be given in connection with this.

In the operation stop state, as shown in FIG. 3, the push plate 32 of the compression device 3 moves upward, and the push plate 52 of the pushing device 5 is retracted. In this state, the PET bottle A put into the loading chamber 4 is stored in front of the front plate 53 of the pushing device 5. Then, from this state, turn on the start switch
When the time chart of FIG. 7 starts, first, the hydraulic cylinder 51 of the pushing device 5 extends from the state of FIG. 3, the push plate 52 moves forward, and the PET bottle group in front of the front plate 53. B is pushed into the volume reduction chamber 2 as shown in FIG. In this embodiment, as shown in FIG. 7, the pushing device 5 is pushed twice in succession, and about 3 kg of the plastic bottle A is put into the volume reduction chamber 2 by the two pushing operations in succession. It is designed to be used.

When the push plate 52 moves forward, the plastic bottle A may be pinched between the upper end corner of the front plate 53 and the upper edge 22 of the insertion port 21. In this case, the push plate 52 Near the most advanced position of the cutting blade 8 on the side of the push plate 52.
2 engages with the cutting blade 81 on the side of the upper edge 22 of the insertion port, and cuts the PET bottle A sandwiched into two as shown in FIG. Then, one cut piece Aa of the cut PET bottle falls into the volume reduction chamber 2, and the other cut piece Ab remains on the upper plate 54 of the push plate 52. Therefore, the plastic bottle does not remain in the insertion port 21 portion while being pinched, and the push plate 3 of the compressor 3 to be operated next is not operated.
2 does not hinder the downward movement.

Next, the push plate 52 of the pushing device 5 (the front plate 5)
3) With the inlet 21 closed (the state of FIG. 4), the hydraulic cylinder 31 of the compression device 3 extends, and the push plate 32 is
As shown in FIG. 7, the PET bottle group B at the bottom of the volume reduction chamber 2 is compressed by moving down to the vicinity of the bottom of the volume reduction chamber 2 (operation of FIG. 7). At this time, the needles 36, 36,... Protrude further below the lower surface of the movable plate 34, and
Make a hole in Further, at the time of the first compression operation, since the amount of plastic bottles in the volume reducing chamber 2 is small, the movable plate 34 is lowered to the vicinity of the bottom plate 26 of the volume reducing chamber 2 as shown in FIG. The resistance increases sharply at the point when the pressure is strongly compressed). At this time, the pressure in the expansion side hydraulic circuit 38 becomes higher than a predetermined pressure set by the pressure gauge 16, and the control panel 10 controls the hydraulic cylinder 31 (electromagnetic) of the compression device 3 based on the ON signal from the pressure gauge 16. When the extension operation stop signal (extension state is maintained) is issued to the switching valve 13), a signal for reducing the hydraulic cylinder 31 is issued from the control panel 10 after a predetermined timer (for example, after 3 seconds). At this time (when the hydraulic cylinder 31 contracts), first, each needle 36,
36.. Are immersed upward with respect to the movable plate 34, so that the plastic bottle A pierced with the needle 36 does not move upward with the push plate 32. When the push plate 32 descends to the vicinity of the lowermost movement position as shown in FIG. 5 (the pressure gauge 16 becomes 0 N), the upper end 35 a of the guide side plate 35 of the movable plate 34 is considerably lower than the detection position of the detector 15. And the detector 15 is turned off. Therefore, at this time, the full detection signal from the control panel 10 is not issued (the full detection signal is issued only when both the pressure gauge 16 and the detector 15 emit ON signals).

After the first compression operation by the compression device 3, the hydraulic cylinder 31 of the compression device 3 is sequentially reduced by the signal from the control panel 10 (the push plate 32 is moved up to the original standby position) → The hydraulic cylinder 51 of the push-in device 5 is reduced (the next plastic bottle group B is dropped in front of the front plate 53) → The hydraulic cylinder 51 of the push-in device 5 is extended twice (from the input port 21 to the next plastic bottle group). B is accumulated on the PET bottle mass which has been compressed first) → The hydraulic cylinder 31 of the compression device 3 is extended to perform the second compression (FIG. 7).
Behavior). In the same manner as described above, the injection of the PET bottle group B by the pushing device 5 and the compression operation (the operation of FIG. 7) by the compression device 3 are performed to obtain a predetermined amount (for example, 15 kg).
(About) PET bottle lump C.

During the final (fifth) compression operation, since the bulk of the plastic bottle lump C in the volume reduction chamber 2 is increased, the movable plate 34 of the push plate 32 is moved to the height indicated by the chain line in FIG. At the point of time when the pressure gauge
6 emits a 0N signal, and at this time, the upper end of the guide side plate 35 of the movable plate 34 is positioned at a position 35a '(detector 15
(Slightly above the detection position), and the detector 15 detects the guide side plate (reference numeral 35 '). Therefore, in this state, the pressure gauge 16 and the detector 15
Emit a 0N signal, and the control panel 10 issues a reduction operation signal to the hydraulic cylinder 61 of the shutter device 6 based on both signals (full detection signal). still,
The hydraulic cylinder 31 of the compression device 3 contracts almost simultaneously with or earlier than the contraction operation of the hydraulic cylinder 61 on the shutter device 6 side. Then, the hydraulic cylinder 61 of the shutter device 6 is sequentially reduced by the signal from the control panel 10 (the cover plate 62 is opened), and the hydraulic cylinder 71 of the extruding device 7 is extended to the first stage (the PET bottle is pushed by the push plate 72). mass is extruded to the position of the code C ₁ in FIG. 2) → binding machine 9 is operated first time (the tip-sided position of the plastic bottle chunk C ₁ is strapped 91) → extrusion device 7 of the hydraulic cylinder 71
It was extended second stage (position bottles mass of code C ₂₎
→ binding machine 9 is operated the second time (PET lumps C intermediate position ₂ is strapped 91) → the hydraulic cylinder 71 of the extrusion device 7 is the third stage extension (PET lumps code C ₃
Position) → Operate the binding machine 9 for the third time (the position near the rear end of the PET bottle lump C ₃ is tied up with the string 91) → Reduce the hydraulic cylinder 71 of the extruding device 7 completely (the push plate 72 is returned to the original position). (Retract to the standby position) → Extend the hydraulic cylinder 61 of the shutter device 6 (the cover plate 62 is returned to the closed position)
Then, one cycle ends. Then, in the PET bottle volume reducing machine, after the first cycle is completed, the next cycle is started continuously, and the PET bottle volume reducing machine is automatically and continuously operated only by putting an empty PET bottle A into the charging chamber 4. In this embodiment, the PET bottle lump C formed in one cycle is:
It has a rectangular parallelepiped shape with a length of 600 mm, a width of 400 mm and a height of about 300 mm, and weighs about 15 kg. The time required for one cycle is about 145 seconds.

[0036]

According to the PET bottle volume reducing machine of the present invention, the PET bottle group B in the charging chamber 4 is pushed by the pushing device 5.
When the PET bottle A is caught between the upper end portion of the front surface of the push plate 52 of the pushing device 5 and the upper edge portion 22 of the insertion port 21 when the PET bottle A is pushed into the volume reduction chamber 2, A is pushed by the pushing device 5 so that the two cutting blades 81, 8
Since the cutting is performed at 2, the trouble that the PET bottle is clogged between the push plate and the upper edge of the inlet like the conventional PET bottle volume reducing machine can be solved beforehand. Therefore, the operation is not interrupted due to the clogging of the PET bottle, and the PET bottle is not clogged, so that the durability of the machine is improved.

[Brief description of the drawings]

FIG. 1 is a plan view of a PET bottle volume reducing machine according to an embodiment of the present application.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along the line III-III of FIG. 1;

FIG. 4 is a state change diagram from FIG.

FIG. 5 is a sectional view showing an operation state of a compression device in the PET bottle volume reducer of FIG. 1;

FIG. 6 is a partially enlarged view of FIG. 4;

FIG. 7 is a time chart of each operation part of the PET bottle volume reducing machine of FIG. 1;

FIG. 8 is a schematic sectional view of a conventional PET bottle volume reducing machine.

FIG. 9 is a partially enlarged view of FIG. 8;

[Explanation of symbols]

1 is a machine stand, 2 is a volume reduction room, 3 is a compression device, 4 is a charging room, 5
Is a pushing device, 6 is a shutter device, 7 is an extruding device, 8 is a cutting device, 10 is a control panel, 21 is an inlet, 22 is an upper edge, 31 is a hydraulic cylinder, 32 is a pressing plate, and 51 is a hydraulic cylinder ( Driving device), 52 is a pressing plate, 81 is a cutting blade, 82 is a cutting blade, A is a PET bottle, B is a PET bottle group, and C is a PET bottle lump.

Claims (1)

[Claims] An input chamber (4) for a plastic bottle (A) is provided on an outer surface near the upper part of a volume reduction chamber (2) facing vertically, and a group of plastic bottles (B) in the input chamber (4) is provided. The pushing device (5) pushes into the volume reduction chamber (2) from the input port (21) formed in the side surface of the volume reduction chamber (2), and the PET bottle group ( B) A PET bottle volume reducing machine in which a compression device (3) is used to compress the bottle, wherein the pushing device (5) has a push plate having substantially the same shape and size as the opening area of the input port (21). (52) and the pressing plate (52)
And a driving device (51) for moving forward and backward in a horizontal direction between a retracted position and a forward position for closing the input port (21), and one upper edge (22) of the input port (21) While attaching the cutting blade (81), the other cutting blade (82) is attached to the upper end of the front surface of the pushing plate (52) of the pushing device (5), and the pushing plate (52) is attached to the input port (21). When the plastic bottle (A) is moved forward to a position where it closes, the plastic bottle (A) sandwiched between the upper end portion of the front surface of the push plate (52) and the upper edge portion (22) of the insertion port (21) is cut by the cutting blades (81, 82). ), A PET bottle volume reduction machine characterized by being cut off.