JPH0435037Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an empty can press device for compressing and deforming used empty cans so that they can be conveniently disposed of, transported, etc.

(Prior art) Conventionally, this type of empty can press equipment controls the expansion and contraction of the hydraulic cylinder by switching a switching valve installed in a hydraulic device that supplies pressure oil to the hydraulic cylinder. By moving the press plate back and forth in the press chamber, the empty cans were compressed and deformed.
An electromagnetic switching valve is used as the switching valve, and the switching of the electromagnetic switching valve is performed using the magnetic action generated when a current is passed through the solenoid.

(Problem that the invention aims to solve) However, the electromagnetic switching valve installed in the hydraulic system is expensive, and the use of this expensive electromagnetic switching valve increases the manufacturing cost of the empty can press equipment. There was a problem. In addition, the contents contained in cans are often liquid, and if the can is pressed with liquid remaining inside the can, the remaining liquid may cause malfunctions in the electromagnetic switching valve. There is a problem in that the electromagnetic switching valve has an adverse effect, and for this reason, the area around the electromagnetic switching valve needs to be configured to prevent liquid from entering.

In addition, as seen in the one described in Japanese Utility Model Publication No. 52-18617, when the pressure plate reaches the upper limit position, the stroke end, the elastic shaft is retracted and locked by the water pressure of the water sent to the auto-reset. A structure has been proposed in which the plate is returned to its original position, thereby activating the lever.

However, in the above method, the elastic shaft is retracted by water pressure after the pressure plate reaches the stroke end, so the elastic shaft retracts after the pressure plate reaches the stroke end, causing the pressure plate to descend. It takes a long time to start the operation, and therefore there is a problem that switching between reciprocating operations cannot be performed quickly.

Also, even if it becomes necessary to stop compression and lower the pressure plate during compression, the water pressure sufficient to retract the elastic shaft will not be obtained unless the same pressure is generated on the pressure plate as at the end of the stroke. Therefore, there was a problem that the pressure plate could not be lowered quickly, which was not desirable from a safety standpoint.

(Means for Solving the Problems) The empty can press device of the present invention has a press plate provided in the press chamber that can reciprocate in the press chamber by the expansion and contraction of a hydraulic cylinder. In an empty can press device configured to compress and deform an empty can with a holding portion disposed opposite to the pressing plate, a switching valve provided in the hydraulic device for expanding and contracting the hydraulic cylinder is configured to include a switching valve. The switching lever is configured to be freely switched by swinging a switching lever connected to the switch, and a switching mechanism is mechanically connected to the switching lever for swinging the switching lever in conjunction with the movement of the pressing plate to switch the switching valve. , this switching mechanism includes two arms whose one ends are rotatably supported coaxially;
A spring provided at the other end of the two arms and biasing the two arms in the matching direction, and the two arms biased by the spring forming a dogleg shape and a reverse dogleg shape. a stopper that is held in two positions; a plate that is connected to the switching lever via a connecting member and that swings the switching lever as the two arms rotate; and a control bar equipped with an actuating member that forcibly rotates the two arms to opposite positions against the biasing force of a spring during maximum forward movement and maximum backward movement. An emergency lever is provided for switching the pressing plate to move the pressing plate away from the holding portion.

(Operation) The switching valve of the hydraulic system is switched by a switching mechanism mechanically connected to the switching valve. Specifically, when the press plate reaches its maximum forward position, the operating member of the control bar simultaneously rotates the two arms to rotate the plate, which swings the switching lever and opens the switching valve. Switch. Thereby, the flow path of the pressure oil supplied from the hydraulic system to the hydraulic cylinder is switched, and the hydraulic cylinder is moved backward. That is, when the press plate is moved forward and backward to its maximum extent, the links and the like forming the switching mechanism operate to switch the switching valve of the hydraulic system, thereby controlling the expansion and contraction of the hydraulic cylinder.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

1 to 3 show an empty can pressing device according to the present invention.

In the figure, reference numeral 1 denotes a frame of an empty can pressing device, and this frame 1 is formed into an upper chamber 3 and a lower chamber 5 by a partition wall 2. As shown in FIG.

A pressing plate 6 is disposed within the upper chamber 3 so that the front portion of the upper chamber 3 can be moved in the front-back direction (see the arrow in FIG. 1). The upper chamber 3 is provided with a front wall facing the pressing plate 6, and this front wall serves as a holding portion 3a that compresses the empty can with the pressing plate 6. A space surrounded by the press plate 6, the clamping portion 3a, the left and right side walls 3b, 3b of the upper chamber 3, and the front portion 2a of the partition wall 2 forms a press chamber 7.

The upper opening of the press chamber 7 is configured to be openable and closable by a lid 8 pivotally supported on the front wall. Also,
A discharge port 9 for discharging pressed empty cans from the press chamber 7 to the outside is formed at the front lower part of the press chamber 7.

A hydraulic cylinder 10 is provided at the rear inside the upper chamber 3. Rod 10c of hydraulic cylinder 10
is fixed to the back surface of the press plate 6, and the press plate 6 moves into the press chamber 7 by the expansion and contraction of this hydraulic cylinder 10.
It is configured to move back and forth within.

The lower chamber 5 of the frame 1 has the hydraulic cylinder 1
A hydraulic device 11 for expanding and contracting the 0 is provided. This hydraulic device 11 is for supplying pressure oil to the hydraulic cylinder 10.

FIG. 4 shows a hydraulic circuit diagram of the empty can press device.

The hydraulic pump P is communicated with the switching valve 12.
The A port of the switching valve 12 is communicated with the tip chamber 10a of the hydraulic cylinder 10 through an oil passage pipe 13, and the B port of the switching valve 12 is communicated with the base chamber 10b of the hydraulic cylinder 10 through an oil passage pipe 14. There is.

The switching valve 12 is built in, for example, the hydraulic pump P, and can be switched by swinging a switching lever 15 (see FIGS. 1 and 2) provided at the top of the hydraulic pump P.

Reference numeral 16 is a relief valve that operates when the pressure exceeds a set pressure, and 17 is a check valve.

This switching lever 15 has a switching mechanism that operates in conjunction with the forward and backward movement of the press plate 6 (that is, the expansion and contraction movement of the hydraulic cylinder 10) and swings the switching lever 15 to switch the switching valve 12. 20 are connected to each other, and the configuration of the switching mechanism 20 will be described below.

The tip of a control bar 21 is fixed to the back surface of the pressing plate 6. This control bar 21
is arranged horizontally and substantially parallel to the hydraulic cylinder 10, and abutting members (actuating members) 22 and 23 are provided at both ends of the control bar 21. Furthermore, a first link mechanism 25 is provided on the side of the hydraulic cylinder 10 on the side where the control bar 21 is arranged.

The first link mechanism 25 operates by contacting each of the contact members 22 and 23 when the press plate 6 is moved forward and backward at its maximum. A shaft 27 is erected on the mounting member 26 attached to the partition wall 2, and this shaft 2
Two arms 28 and 29 are each rotatably attached near the upper end of 7. Each of the arms 28 and 29 has a pin 30 at its tip,
31 are provided vertically, and these pins 30, 31 extend vertically from each arm 28, 29.

At the lower end of the shaft 27 are two sub-arms 32, 3.
3 is rotatably attached, and the tips of these sub-arms 32 and 33 are connected to corresponding pins 30 and 33 so as to be paired with the corresponding arms 28 and 29, respectively.
31, respectively. Also,
Collars 30a, 31 are attached to the upper ends of the pins 30, 31.
a is inserted, and these collars 30a, 31
A is a contact portion that contacts the contact members 22 and 23.

Furthermore, both ends of a spring 35 are fixed to the upper ends of these pins 30, 31, and the two arms 28, 29 are always biased in the matching direction. Hereinafter, for convenience of explanation, the arm 28, sub-arm 32, and pin 30 arranged on the side of the hydraulic cylinder 10 will be referred to as the first arm 28, the first sub-arm 32, and the first pin 30; The second arm 29, second sub-arm 3
3. It is called the second pin 31.

Furthermore, the shaft 27 has a first plate 36 and a second plate 36 mounted on the shaft 27.
Arms 28, 29 and first and second sub-arms 32,
33 and is rotatably attached. A notch 37 is formed in the peripheral edge of the plate 36, and the first pin 30 is fitted into this notch 37. The mounting member 26 also includes a stopper 38,
39 is installed upright, and these stoppers 38, 39
The second arm 29 comes into contact with.

In this way, the mounting member 26, the shaft 27, the first arm 28, the second arm 29, the first sub-arm 32,
Second sub-arm 33, first pin 30, second pin 3
1. The first link mechanism 25 is composed of the collars 30a, 31a, the spring 35, the plate 36, and the stoppers 38, 39.

One end of a connecting rod 40 is connected to the plate 36. The other end of this connecting rod 40 is connected to a swinging lever 4 which is inserted through the partition wall 2 and pivotably supported.
It is connected to the upper end of 1. A connecting pin 42 is fixed to the lower end of the swing lever 41, and the connecting pin 42 is fitted into a notch formed in the upper end of the switching lever 15. In other words,
The connecting rod 40 and the swing lever 41 constitute a connecting member that connects the plate 36 and the switching lever 15.

Furthermore, a limit switch 51 is provided at the rear end of the upper chamber 3. limit switch 51
is the contact 5 when the press plate 6 is moved back the most.
1a is arranged so as to abut against the abutment member 22 of the control bar 21. This limit switch 51 is normally turned on, and the contact 51
OFF when the contact member 22 contacts a.
become.

45 is an emergency lever, and this emergency lever 4
A central portion of the frame 5 is pivotally supported by a bracket (not shown) attached to the frame 1 or the partition wall 2. The emergency lever 45 is connected to one end of a connecting member 46, and a pin 47 fixed to the swing lever 41 is fitted into a long hole 46a formed at the other end of the connecting member 46. Therefore, in the case of an emergency, the swing lever 41 swings by rotating the emergency lever 45 downward, and the switching lever 15 is actuated. In addition, the emergency lever 45 and the connecting member 46
A spring 48 is provided between the emergency lever 45 and the emergency lever 45, so that the emergency lever 45 is always urged upward.

The reference numeral 60 in the figure is a handle for locking the lid 8, and the reference numeral 61 is a power cord.

FIG. 5 shows an electrical circuit diagram of the empty can pressing device.

In the figure, reference numeral 50 denotes a button switch attached to the side of the empty can pressing device.The button switch 50 closes the circuit by pressing the button, and automatically returns to open the circuit by releasing the button. 5
1 is the aforementioned limit switch, 52 is a coil,
53, 54, and 55 are normally open relay switches that are closed when the coil 52 is excited, and M is an electric motor for operating the hydraulic pump P.

Next, the operation of the empty can press apparatus configured as described above will be explained.

First, the lid 8 is opened and an empty can is put into the press chamber 7. After the lid 8 is closed, the button switch 50 is pressed. When button switch 50 is pressed, coil 52 is excited, relay switches 53, 54, and 55 are closed, and electric motor M is driven. At this time, the contact 51a of the limit switch 51 is in contact with the contact member 22, and the limit switch 51 is turned off. Then, as the electric motor M is driven, the hydraulic pump P is operated and supplies pressure oil to the hydraulic cylinder 10.

At this time, the switching valve 12 is in the right position in FIG. 4, and the pressure oil discharged from the hydraulic pump P is supplied to the base chamber 10b of the hydraulic cylinder 10 through the oil passage pipe 14, and the rod 10c is extended. The press plate 6 moves forward within the press chamber 7. As the pressing plate 6 moves forward a little, the limit switch 51 returns with its contact 51a separating from the contact member 22 and turning ON.
become a state. In this way, the limit switch 51
When turned on, the electric motor M does not stop even if the button switch 50 is released, and the press plate 6 continues to move forward. In this way, button switch 5
Keep pressing 0 until the limit switch 51 turns ON. Note that the time period for which the button switch 50 is kept pressed is about 2 seconds in this device.

As the pressing plate 6 moves forward, the empty can is compressed and deformed by the pressing plate 6 and the clamping portion 3a. When the press plate 6 advances to the front of the press chamber 7, the contact member 22 disposed at the rear end of the control bar 21 that moves together with the press plate 6 fits into the first and second pins 30 and 31. color 30
a, 31a. When the pressing plate 6 moves further forward, the abutting member 22 is moved by the first and second pins 30 and 31.
is pressed forward, and the first and second arms 28 and 29 as well as the first and second pins 30 and 31 are also pushed forward by the spring 3.
Each rotates forward against the urging force of 5. When the press plate 6 reaches the maximum forward position and the tips of the first and second arms 28 and 29 rotate forward of the shaft 27, these first and second arms 28 and 2
9 is rotated by the biasing force of the spring 35 to a position where the second arm 29 comes into contact with the stopper 38. At this time, the first pin 30 of the first arm 28 comes into contact with the front part 37a of the notch 37 of the plate 36, and rotates the plate 36 in the counterclockwise direction in FIG. 3 (see the dashed line in FIG. 3). ). This allows the connecting rod 40 connected to the plate 36 to
moves in the direction of arrow P in FIG. 3, the swing lever 41 swings, and the switching lever 15 is switched (see the one-dot chain line in FIG. 2). When the switching lever 15 is switched, the switching valve 12 is switched to the left position in FIG. 4, and the pressure oil supplied from the hydraulic pump P is supplied to the tip chamber 10a of the hydraulic cylinder 10 through the oil path pipe 13. Therefore, the rod 10c of the hydraulic cylinder 10 retracts, and the pressing plate 6 retreats. As the pressing plate 6 moves forward in this manner, the empty can is compressed between the pressing plate 6 and the clamping portion 3a, and is discharged to the outside from the discharge port 9.

Then, when the press plate 6 retreats and reaches the vicinity of the rear part of the press chamber 7, the contact member 23 provided near the front end of the control bar 21 moves the collars 30a of the first and second pins 30, 31, 31a. When the press plate 6 is further retreated, the first and second
Together with the pin, the first and second arms 28 and 29 rotate rearward against the biasing force of the spring 35.
Then, when the tips of the first and second arms 28 and 29 rotate backward from the shaft 27, the second arm 29 comes into contact with the stopper 39 due to the biasing force of the spring 35. Rotate until they touch. Accordingly, the plate 36, the connecting rod 40, and the swinging lever 41 perform operations opposite to those described above to switch the switching lever 15 and switch the switching valve 12.
is switched to the right position in FIG. At the same time, the contact member 22 provided at the rear end of the control bar 21 and the contact 51a of the limit switch 51 come into contact. As a result, the limit switch 51 is turned off, the coil 52 is demagnetized, the relay switches 53, 54, and 55 are opened, and the electric motor M is stopped. In this way, the press plate 6 makes one reciprocation in the press chamber 7 and then stops.

In addition, if you want to return the press plate 6 from an intermediate position to its original position when the forward movement of the press plate 6 has stopped because there is a foreign object in the empty can to be pressed or in an emergency, use the emergency lever 4. By rotating the connecting member 46 downward and moving the connecting member 46 in the direction of arrow Q in FIG. 2, the swinging lever 41 swings, the switching lever 15 switches, and the switching valve 12 is switched to the right position. Therefore, the pressure oil supplied from the hydraulic pump P is sent to the tip chamber 10a of the hydraulic cylinder 10 through the oil pipe 13, and the rod 10c retracts and the press plate 6 retreats so as to be separated from the clamping part 3a. , stop as before.

Furthermore, even if the power is turned back on due to a power outage during the process, this empty can pressing device will not operate unless the button switch 50 is pressed again.

(Effects of the invention) As described above, according to the invention, switching of the switching valve is performed by mechanical operation by the switching mechanism, so there is no need to use an expensive electromagnetic switching valve as in the past. Therefore, it is possible to reduce the manufacturing cost of the empty can pressing device.

Furthermore, since this switching mechanism switches the switching valve by mechanical operation, it is resistant to moisture and will not malfunction even if liquid remaining in the empty can leaks inside the press chamber.

Furthermore, at the same time that the pressing plate reaches its maximum forward position, the operating member of the control bar rotates the two arms to rotate the plate, which swings the switching lever and switches the switching valve. The pressing plate is quickly retreated by switching. Moreover, since the two arms are reliably held in two positions by the spring and the stopper, it is safe to prevent the switching valve from being switched inadvertently.

In addition, in an emergency, the switching valve can be switched using the emergency lever and the pressing plate can be switched quickly by retreating, which is safe.

[Brief explanation of the drawing]

1 to 5 show an empty can pressing device according to the present invention, FIG. 1 is a partially cutaway side view showing the empty can pressing device, and FIG. 2 is a partially cutaway side view showing the empty can pressing device. 3 is an enlarged plan view showing the configuration of the switching mechanism, FIG. 4 is a hydraulic circuit diagram, and FIG. 5 is an electric circuit diagram. 3a...Holding part, 6...Press plate, 7...Press chamber, 10...Hydraulic cylinder, 11...Hydraulic device,
12...Switching valve, 15...Switching lever, 20...
Switching mechanism, 21... Control bar, 22, 2
3... Contact member (operating member), 28, 29... Arm, 35... Spring, 36... Plate,
38, 39...stopper, 40...connection rod,
41... Swing lever, 45... Emergency lever.

Claims (1)

[Scope of Claim for Utility Model Registration] A press plate provided in a press chamber is provided so as to be able to reciprocate in the press chamber by the expansion and contraction of a hydraulic cylinder, and this press plate and a clamping portion disposed opposite to the press plate. In an empty can press device configured to compress and deform empty cans, a switching valve provided in the hydraulic device for expanding and contracting the hydraulic cylinder is operated by swinging a switching lever connected to the switching valve. The switching lever is mechanically connected to a switching mechanism that swings the switching lever in conjunction with the movement of the pressing plate to switch the switching valve. Two arms that are rotatably supported, a spring provided at the other end of the two arms that biases the two arms in a mating direction, and two arms biased by the springs. a stopper that holds the switch in two positions, a dogleg shape and an inverted dogleg shape, and a stopper that is connected to the switching lever via a connecting member and swings the switching lever as the two arms rotate. a plate, moving together with the pressing plate;
and a control bar equipped with an actuating member that forcibly rotates the two arms to opposite positions against the biasing force of a spring when the pressing plate is moved forward and backward at its maximum. An empty can press device characterized in that an emergency lever is provided for forcibly switching the pressing plate to move the pressing plate away from the clamping part.