JP2002066800A - Compression equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a press cylinder to operate in two modes, namely a formation mode and a finish mode in which the press cylinder acts at a higher pressing capacity than in the formation mode. SOLUTION: The action of a press cylinder 5 is controlled by means of a valve 29 for operating the press cylinder 5, with pressure oil drawn from an oil tank 28 by means of an oil pump 27, and the action of an extrusion cylinder 8 is controlled by means of a valve 30 for operating the extrusion cylinder 8. A relief valve 31 acting at a set (low) pressure in the formation mode and a relief valve 32 acting at the maximum (high) pressure in the finish mode are connected in parallel to the press cylinder 5. A shutoff valve 35 is connected in series to the relief valve 31 and the action of the press cylinder 5 is changed over between the formation mode and the finish mode by operating the shutoff valve 35.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compression apparatus for compressing a processed product such as a PET bottle or cardboard waste into a bale.

[0002]

2. Description of the Related Art Compression of a veil is carried out by repeating the operation of charging a processed material and compressing it with a press board many times. It is difficult to accurately grasp the number of repetitions of the operation of feeding the processing object and compressing it with the press plate due to the input amount per operation, the difference in the processing object, and the like. Therefore, conventionally, as described in Japanese Patent Application Laid-Open No. 9-24492, for example, an input port (hopper) is provided with an input amount detecting means to regulate the input amount per operation, and the press platen immediately before the lower limit is reached. 2. Description of the Related Art There is known an apparatus which is provided with a pressure detecting means for detecting a pressurizing force, and confirms whether or not an inputted processing object can be compressed based on a value detected by the pressure detecting means in a final compression stage. In addition, since the input amount detecting means is expensive in the above-mentioned apparatus, the input amount detecting means is omitted, and a lower limit switch for detecting that the press platen has reached the lower limit position, and an additional load applied to the press platen at that time. By providing a pressure switch that detects the pressure, the operation of the press platen is stopped if the pressing force at the time of reaching the lower limit of the press plate has reached the set pressing force, and the press plate is raised if the pressing force is below the set pressing force. There is also known an apparatus which can be re-input.

[0003]

All of the above-mentioned conventional devices require expensive detection means and control means, which causes an increase in cost. Also, if the input amount exceeds the specified value contrary to the expectation, the press plate will stop before reaching the lower limit due to insufficient pressing force, so that the insufficiently compressed veil cannot be pushed out from the discharge port. .

[0004]

SUMMARY OF THE INVENTION The present invention is a compression apparatus which is inexpensive and prevents unexpected situations such as insufficient pressurizing force. Another object of the present invention is to enable a two-mode operation of a forming mode in which a pressing mode is higher than a pressing mode in the forming mode. To enable two-mode operation, a relief valve that operates in the forming mode and a relief valve that operates in the finishing mode are connected in parallel to the press cylinder, and a relief valve that operates in the forming mode has a shut-off valve. It is desirable to connect them in series.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a compression apparatus according to the present invention, which is a compression packing apparatus in which a bundling machine is integrally assembled with the compression apparatus, will be described with reference to the drawings. 1, 2 and 3 show the whole of the compression packing apparatus as viewed from the front, side and top, respectively, and FIG. 4 shows a side view in which a part is shown in cross section. Reference numeral 1 denotes a compressor corresponding to the compression device of the present invention. A compression chamber 2 is formed inside the main body of the compressor 1 as shown in FIG. Is provided with a discharge port 4. In the input port 3,
A vertical opening type opening door 3a that opens forward with the lower edge as a fulcrum,
Further, the discharge port 4 is provided with a horizontally opening discharge door 4a that opens forward with the left edge as a fulcrum. When the door is closed, the door is fitted into the opening, and the front surface of the compressor 1 is flat. It is becoming. In the compression chamber 2, a press platen 6 which is raised and lowered while maintaining a horizontal posture by a press cylinder 5 and guide cylinders 5a, 5a provided upright on the compressor 1 is incorporated.

An extruder 7 is connected to the rear side of the compressor 1. The extruder 7 has an extruding cylinder 8 horizontally arranged at the center.
An extruding plate 9 attached to the tip of the piston rod 8a in a vertical posture is provided with a discharge port 4 from the rear wall position of the compression chamber 2.
It is incorporated so that it can move forward and backward between positions protruding outward,
A plurality of dogs 10a, 10a,... Attached to a guide rod 10 which is arranged in parallel with the piston rod 8a and moves forward and backward integrally with the pushing plate 9 is positioned at a position where the pushing plate 9 advances and retreats. The contact is detected by contacting the limit switch 11 attached to the main body.

A bundling machine 12 is provided adjacent to the side of the discharge port 4 of the compressor 1, and a band guide 13 attached to the bundling machine 12 is positioned at a position just before the band 4 comes out of the discharge port 4. The band 15 unreeled from the reel 14
It is lowered right below from the upper part of the right side edge, and from there, it is guided upward from the lower part on the left side through the lower side, and the band outlet 13a
It is arranged along the circumference of the discharge port so as to be caught from the head. Bale pressing guides 16 are provided above and below the discharge port 4 from the inner peripheral edge thereof to the outside.

[0008] The discharge door 4a is equipped with a double lock mechanism comprising a first lock means and a second lock means. As shown in FIGS. 5 and 6, the lock mechanism includes, as first lock means, a vertically slidable lock bar 17 which is a lock member externally attached to the right end of the discharge door 4 a, and a main body of the compressor 1. A structure composed of a combination of locking recesses 18 and 18 ', which are locking portions provided on the side, has a push-up rod 19 which is a locking member incorporated on the left side of the discharge door 4a as a second locking means. , Each having a combination with an insertion hole 20 as a locking portion provided at the upper part of the discharge port 4. The locking recesses 18 and 18 ′ of the first locking means are provided vertically, respectively. The upper locking recess 18 is recessed inward and downward in a pocket-like shape at the upper part of the discharge port 4. Are formed, and the lower locking recess 18 ′ is formed.
Is formed in a groove shape to guard the lower side of the band guide 13. The locking bar 17 has upper locking rollers 21 and 2 on both sides of a boss 17a protruding from the upper side.
1 is mounted on the upper rocking roller 2
1, 21 are recesses 18a of the upper locking recesses 18.
The upper side is locked by fitting into the lock bar 17.
Lower rocking roller 2 attached to both lower sides of
The lower side is locked by pushing the 1 ', 21' into the groove-shaped lower locking recess 18 '. The second locking means is locked when the tip of the push-up rod 19 constantly urged upward by the spring 19a is inserted into the insertion hole 20. The insertion hole 20 is formed as a long hole having a margin in the door opening direction, and is locked in a rattling state by the second locking means alone, and when the internal pressure is received, the discharge door 4a is slightly opened. .

The two lock mechanisms are provided with one operating lever 2.
Locking or unlocking can be performed by rotating the 2. The operation lever 22 is attached to the left side of the lock bar 17 as a fulcrum, and is attached so as to be vertically rotatable along the door surface.
It is mounted at an eccentric position with respect to 2 ′ and is linked to the lock bar 17 via a plate cam 23.
The plate cam 23 and the push-up rod 19 are connected by a chain 24. The cam surface of the plate cam 23 is guided by a cam roller 25 and, together with the stopper pin 26, regulates the rotation range of the operation lever. The lock mechanism thus formed rotates the operation lever 22 approximately 45 degrees counterclockwise to push up the lock bar 17 as shown in FIG. Rollers 21 and 21 fall into dropping portion 18a
And the lower locking roller comes out of the lower locking concave portion 18 '. By further rotating the lock bar 17 by 45 degrees in the counterclockwise direction, the lock bar 17 is slightly pushed up as shown in FIG. 7B, and the push-up rod 19 is pushed from the insertion hole 20 by the pulling force of the chain 24. The first locking means and the second locking means, which are pulled down to the exit position, can be sequentially released.

FIG. 8 shows a hydraulic circuit, in which both the press cylinder 5 and the push cylinder 8 are operated by pressurized oil pumped from an oil tank 28 by an oil pump 27. The operation of the press cylinder 5 can be controlled by the operation valve 29, and the operation of the extrusion cylinder 8 can be controlled by the operation of the extrusion cylinder operation valve 30. The pressure oil supply path and the return path are connected to each other by two bypass paths 33 and 34 having relief valves 31 and 32, and the relief valve 31 provided in one of the bypass paths 33 is The relief valve 32, which operates at a set pressure (low pressure) and is provided in the other bypass passage 34, is operated at a maximum pressure (high pressure). An off valve 35 is attached. That is, the relief valve 31 operating in the formation mode
And the relief valve 32 operating in the finishing mode,
In each case, the shut-off valve 35 is connected in series to the relief valve 31 which is connected in parallel with the press cylinder 5 and operates in the forming mode. Therefore, by operating the shut-off valve 35, the cylinders 5, 8
The upper limit of the pressure oil fed to the hopper is switched between two stages, and a two-mode operation of a forming mode and a finishing mode is possible.

Next, the operation of the compression packing apparatus thus formed will be described. Note that push buttons for operation described later are provided in a control box (not shown). First, by closing the discharge door 4a and pressing the reset button, the press cylinder operating valve 29 is operated to cause the press platen 6 to wait at the upper limit position. Is charged into the compression chamber 2 in a desired amount. Thereafter, when the input door 3a is closed and the compression button is pressed, the press cylinder valve 19 is operated, the press cylinder 5 is operated, and the processed material input by the press platen 6 is compressed at the set pressure in the molding mode. Is done. When the press platen 6 reaches the lower limit position, the press platen 6
Automatically returns to the upper limit position, the opening door 3a is opened again, and a desired amount of the processing object is again input from the input port 3. By repeating this operation several times, if the amount of processed material increases,
The compression force required to compress the processed material exceeds the set pressure, and the relief valve 31 operates. As a result, the force becomes insufficient and the press platen 6 cannot be pushed down to the lower limit, so that the press platen 6 stops at a position where it does not reach the lower limit. Then, when the finishing compression button is pressed, the shut-off valve 35 is closed to switch to the finishing mode, and a force exceeding the set pressure is applied to the press platen 6, so that the processed material is further compressed and the press plate 6 is lowered to the lower limit. To reach. Therefore, the pressure at which the relief valve 32 operates must ensure a sufficient value so that the processed material is compressed by the press platen 6 even if the processed material is excessively supplied, and the press platen 6 reaches the lower limit. Thus, the operation of compressing and forming the processed material on the bale 36 is completed.

To take out the bale 36, first, the discharge door 4a
Start by opening. When the operation 22 lever is rotated counterclockwise by about 45 degrees, the first locking means is released and the discharge door 4a is opened slightly, but the second locking means is in the locked state, so that it is not opened further. . Further, the operation lever 22
Is rotated approximately 45 degrees counterclockwise, the second locking means is released, and the discharge door 4a can be fully opened. As described above, the discharge door 4a is opened in two stages, and once the force for expanding the compressed veil 36 to be expanded is released when the first locking means is released, the veil 36 is prevented from jumping out. At the same time, it prevents the discharge door 4a from opening suddenly.

When the discharge door 4a is opened and the push button is pressed, the push cylinder valve 30 is operated to start the push cylinder 8, and the bale 36 formed by compression by the push plate 9 is pushed out by a predetermined dimension. The pushing amount of the predetermined size can be adjusted by changing the position of the dog 10a attached to the guide rod 10. When the band sending button is pressed here, the band 15 is automatically sent out into the band guide 13 and is drawn out from the band drawer 13a along the band guide 13. The band 15 pulled out from the band drawer 13a is applied to the upper side of the extruded veil 36,
When the tip is inserted into the insertion opening of the binding machine 12, automatic binding is performed.

When the first bundling is completed, the push button is pushed again to push out the bale 36 by a predetermined size, and the above bundling operation is repeated.
6 is completely extruded from the outlet. As described above, the press cylinder 5 can be operated in the forming mode because the forming mode in which the pressing cylinder 5 is operated at a low press pressure and the finishing mode in which the pressing cylinder 5 is operated in a higher press pressure in the forming mode are possible. Even if the press platen stops before reaching the lower limit position due to excessive loading of the processed material, the processed material can be reliably compressed by increasing the pressing force by switching to the finishing mode. It is. To enable the two-mode operation, a relief valve 31 operating in the forming mode, a relief valve 32 operating in the finishing mode, and a shut-off valve 3 are required.
5 and bypass paths 33, 34 for connecting them
Is simply added to the hydraulic circuit, and expensive detection means and complicated control means are not required.

In the two-mode operation of the present invention, in addition to the above, as shown in FIG. 9, for example, the relief valve 31 operating in the formation mode is moved to the pushing cylinder 8 by pushing the pushing plate back to the rear wall surface side of the compression chamber. It is also possible by arranging in series in the supply path for supplying pressure oil to the oil supply. With such a configuration, it is possible to switch between the two modes by using the valve 30 for operating the extrusion cylinder. It is no longer necessary and no additional bypass is needed. Incidentally, the hydraulic circuit for enabling the two-mode operation is not limited to the above embodiment, for example, by adding a mechanical booster between the press platen and the press cylinder, or between the device body, Any means such as adding an auxiliary pressurizing mechanism can be used.

[0016]

According to the first aspect of the present invention, a two-mode operation of a forming mode operated at a low press pressure and a finishing mode operated at a press pressure higher than the press pressure in the forming mode is made possible. During operation in the low forming mode, even if the press platen stops in the middle of compression due to insufficient pressing force in the forming mode, switching to the finishing mode ensures that the compression is completed and the bale is pushed out from the discharge port. it can. Further, the present invention can be easily implemented simply by adding a valve, and does not require expensive detection means or control means.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an embodiment in which a binding machine is integrally assembled with a compression device according to the present invention to form a compression packing device as viewed from the front side.

FIG. 2 is an explanatory view of an embodiment in which a binding machine is integrally assembled with a compression device according to the present invention to form a compression packing device as viewed from a side.

FIG. 3 is an explanatory view of an embodiment in which a binding machine is integrally assembled with the compression device according to the present invention to form a compression packing device, as viewed from above.

FIG. 4 is an explanatory diagram showing a cross section of a part of the compression packing device.

FIG. 5 is an explanatory view of the lock mechanism as viewed from the front.

FIG. 6 is an explanatory diagram showing a structure of a first lock unit.

FIG. 7 is an explanatory diagram of the operation of the first locking means.

FIG. 8 is an explanatory diagram of a hydraulic circuit.

FIG. 9 is an explanatory diagram showing a modified example of the hydraulic circuit.

[Explanation of symbols]

1 ··· Compressor, 2 ·· Compression chamber, 3 ··· Inlet, 3a ···
Inlet door, 4 outlet, 4a outlet door, 5 press cylinder, 5a guide cylinder, 6 press board,
7. Extruder, 8. Extruder cylinder, 8a
Piston rod, 9. Extruded plate, 10 Guide rod, 10a dog, 11 Limit switch,
12. Bundling machine, 13 band guide, 13a band outlet, 14 band reel, 15 band, 16 bale holding guide, 17 rock bar, 18, 18 ' Stop recess, 19 ··· push-up rod, 19a · · · spring, 20 · · · insertion hole, 21
..The upper rocking roller, 21 '.. the lower rocking roller, 22..the operating lever, 22' .. the rotating shaft, 23 ..
Plate cam, 24 chain, 25 cam roller, 26
Stopper pin, 27. Oil pump, 28. Oil tank, 29. Press cylinder operating valve, 30.
・ Extrusion cylinder operating valve, 31 ・ ・ Relief valve (for low pressure, 32 ・ ・ Relief valve (for high pressure) 3
3, 34 bypass passage, 35 shutoff valve, 36 bale.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H089 AA04 BB15 CC01 DA02 DA14 DB03 DB34 DB44 DB46 DB48 DB49 JJ03 4E089 EA01 EB03 EC08 ED03 EE04

Claims (2)

[Claims] 1. A compression apparatus which enables a two-mode operation of a forming mode in which a press plate is operated at a low press pressure and a finishing mode in which a press plate is operated at a press pressure higher than the press pressure in the forming mode. 2. A relief valve operating in a forming mode and a relief valve operating in a finishing mode are connected in parallel with a press cylinder, and a relief valve operating in a forming mode is connected in series with a shut-off valve. The compression device according to claim 1, wherein a two-mode operation is enabled.