JPH0356973B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides a large number of clamps at equal intervals around the periphery of the rotor, and rotates each of these clamps intermittently one pitch at a time together with the rotor. While the bag is stopped, the bag for packaging is supported by a clamp in a first position, and the bag is conveyed by rotation of a rotor, and during this conveyance, the bag is filled with an article to be packaged. This invention relates to a bag filling and packaging device.

(Prior art) Conventionally, in Japanese Utility Model Application Publication No. 58-67710, a bag supported by a clamp is transported along a circular track, and after the bag is filled with an object to be packaged during this transport, the bag is discloses a rotary bag filling and packaging device in which the opening edge of the bag is heat-sealed with a heater plate, and a sensor is installed in the middle of the transport track, and the bag is transported using the sensor. The condition inside the bag is detected, and if the sensor detects a bag that is not filled with the packaged item, the movement of the heater plate installed behind the sensor is stopped, preventing the empty bag from being heated and sealed. This is disclosed.

(Problem to be Solved by the Invention) However, the above-mentioned conventional device transfers both bags filled with packaged items and heat-sealed and empty bags that have not been heat-sealed to the rear of the heater plate without distinction. However, this type of packaging equipment is often used to package items with a high moisture content, so empty bags that are released from the clamps and fall can become wet. There were drawbacks such as the bags getting wet and making it inconvenient to reuse them, and the trouble of stacking the bags in an orderly manner when reusing the bags that had been released from the clamp and scattered randomly.

(Means for Solving the Problems) In order to eliminate the above-mentioned drawbacks, the present invention provides a method in which a large number of clamps that are closed by the force of springs are mounted at equal intervals around the circumference of the rotor, and the rotor is mounted at the same pitch as the mounting interval of each of these clamps. and means for intermittently rotating the clamps and the clamps together, and the clamps are rotated against the spring force by the pressing force of the first pressing element at the first stop position while the clamps make one rotation on the endless track. a means for opening the clamp, a means for supplying the packaging bag to the opened clamp, a means for filling the packaging bag supported by the clamp at a rear stop position with a packaged object, and a second pressing at the rear stop position. In a bagging and packaging device configured with a means for opening the clamp and releasing the packaging bag by means of a pushing force from an element, the state of filling the packaging bag into the packaging bag supported by the clamp. A switch is provided to detect this, and when the switch does not confirm the filling of the object to be packaged, a signal from the switch cuts off the pressing force of both of the pressing elements and the bag feeding action by the bag feeding means. It is composed of

(Function) The clamp attached to the rotor is first supplied with a packaging bag, supports this packaging bag, and makes one rotation around the endless track. After the bag is filled with the packaged item, it is clamped at the rearmost position. Since the configuration is such that the packaging bag is released from the clamp, pressing elements are provided at the initial bag feeding position and the final releasing position to open the clamps. The switch is indirectly connected to the transmission system, and when the switch does not confirm that the packaging bag is filled with the packaged material, the movement of the power transmission system is stopped to prevent the pressing element from moving. There is. Therefore, when the object to be packaged is not filled, the clamp does not open at the final packaging bag release position and the first bag feeding position, and the endless track is recycled again while the clamp supports the empty packaging bag. It is.

(Example) The rotor 10 formed by a disk in FIG. The rotor 10 is arranged to rotate intermittently at the same pitch as the mounting interval of the clamp arms 20, 20, . . . . As shown in FIG. 4, when a part of the rotor 10 is viewed from the back side, one end of one set of two clamp arms 20, 20 is connected to the pins 21, 2.
The clamp arms 20, 20 are rotatably supported on the rotor 10 via the pins 21, 21, and the sector gears 22, 23 fixed to the pins 21, 21 are engaged with each other so that the clamp arms 20, 20 are interlocked. Roller 25 at the tip of lever 24 provided on pin 21
is engaged with a grooved cam 26 provided concentrically with the rotor 10, and the other ends of the clamp arms 20, 20 are moved toward or apart by the waves of the grooved cam 26. Also, both clamp arms 2 mentioned above
Fixed claws 11a and 11a are provided at the other ends of 0 and 20, respectively.
are provided, and movable claws 11b, 1 are provided on these fixed claws.
1b facing each other, and these movable claws 11b, 1
While inserting the rods 27, 27 provided at 1b into the cylindrical clamp arms 20, 20, the fixing claws 11a, 11 are held by the tension of the springs 28, 28.
The clamps 11, 11 are formed by energizing the movable claws 11b, 11b such that they are always in close contact with each other. In addition, pulleys 29, 29 are provided on the pins protruding from the other ends of the two rods 27, 27 to the outside of the clamp arm, respectively, and these pulleys 29, 29
By applying a force as indicated by arrows 30, 30 to the movable claws 11b, 11b, the fixed claws 11a, 11
The clamps 11, 11 are opened by moving away from a, and when a packaging bag is supplied to the opened clamps 11, 11 and at the same time the forces 30, 30 of the arrows are removed, the reaction force of the springs 28, 28 causes the clamps 11,
11 closes and clamps both sides of the packaging bag. Then, when the gap between the ends of the clamp arms 20, 20 is narrowed by the guide of the grooved cam 26, the clamp 1
The opening edge of the packaging bag held between 1 and 11 is opened.

In FIG. 1, a large number of packaging bags 13 are stacked at point A around the rotor, and this state is shown in FIG. A lever 32 is provided on top of the stacked packaging bags 13 and swings in a range of approximately 45 degrees around a pin 31. A vacuum cup 33 provided at the tip of the lever 32 is connected to a vacuum pump 35 via a line 34. and an on-off valve 36 is provided in the line. The lever 32 rotates once while the rotor 10 shown in FIG. Therefore, the vacuum suction force is applied to the vacuum cup 33 only when the vacuum cup 33 is lifted upward, so that the topmost one of the stacked packaging bags 13 is attracted to the vacuum cup 33 and lifted. At the front of the vacuum cup 33, a clamping claw 39 is provided which swings around a pin 38, and the packaging bag lifted by the vacuum cup 33 is clamped by the clamping claw 39 and clamped around the rotor as shown by arrow 40. 1
1,11.

Further, at point A in FIG. 1, a first pressing element, that is, a hammer lever 43, is provided on the lower side of the rotor 10 as shown in FIG. One end of the lever and the other end of a lever 45, one end of which is engaged with a grooved cam 44, are connected via a rod 46. The grooved cam 44 rotates on the shaft 47 while the rotor 10 moves one pitch.
While the grooved cam 44 rotates once, the pulley 29 is struck only once by the hammer lever 43. The pushing force exerted by the hammer lever 43 corresponds to the force of the arrows 30, 30 in FIG. 4, and as a result, the clamps 11, 11 open and firmly clamp the packaging bag 13 being supplied.

A set of clamps 11, 1 at point A in FIG.
The packaging bag 13 supplied at point 1 is opened while moving from point B to point C, and at point C, the packaging bag is filled with the object to be packaged via the hopper 14. Furthermore, the opening edge of the packaging bag is narrowed from point D to point E.
At this point, the opening edge of the packaging bag is carried between a pair of heat seal bars 15 and 16. As shown in FIG. 5, a pair of heat seal bars 15 and 16 are supported on the machine base by swing arms 48 and 49, and an air cylinder 51 is interposed between both swing arms. A two-position, four-port switching valve 51 is provided in the fluid circuit connecting the compressor 51 and the compressor 52, and a switch 101 is interposed between the electromagnetic portion 53a of the switching valve and the power source. Compressed air is sent to the air cylinder 51 every time the switch 101 is operated by the continuously rotating cam 102, and the pair of heat sealing bars 15 and 16 pinch and seal the packaging bag. The packaging bag is then further sent to point F.

A second pressing element having the same structure as in FIG. 3, that is, a hammer lever 43 is also provided at this point F.
1 and 11 are opened, the packaged product is removed from the clamp. In addition, when a rotary vacuum packaging machine is installed next to the bag filling and packaging device, the packaging bag released from the clamp at point F is transferred to the vacuum packaging machine, and the packaged items inside the bag are vacuum packed. Since the vacuum packaging machine is equipped with a sealing mechanism, the heat sealing bars 15 and 16 at point E are eliminated.

On the other hand, in FIG. 1, a proximity switch 50 is provided between points C and D, and the switch 50 is used to see through the packaging bag and detect whether it is filled with an object to be packaged. As shown in FIG. 5, the switch 50 is connected to the line 54 via a controller 57, and when the switch 50 does not detect an object to be packaged, the valve 53 is switched so that the seal bars 15 and 16 do not operate. That's what I do. In addition, in FIG. 1, the position where the seal bars 15 and 16 are installed is far behind the position where the switch 50 is installed. Therefore, a small scale plate 55 is attached to the shaft 12.
A pulse generator 56 is installed on the scale plate 55 to measure the rotation angle of the rotor, and the pulse generator 56 is connected to a controller 57. Therefore, the controller 57 controls the signal to be delayed so that the seal bars 15, 16 are not moved when the unfilled packaging bag reaches the position of the seal bars 15, 16.

As shown in FIG. 3, the rod 46 is configured using the piston rod of the air cylinder 103, and an electromagnetic switching valve 60 is interposed in the fluid circuit 59 connecting the air cylinder 103 and the compressor 58. Solenoid part 6 of switching valve
A switch 50 is connected to the circuit connected to 0a via a controller 57. Normally, compressed air generated by the compressor 58 is sent to the air cylinder 103 and fixed so as to push out the rod 46 of the air cylinder, but if the packaging bag is not filled with the item to be packaged, the switch 50
When this occurs, the solenoid valve 60 is switched after a predetermined time delay by the controller 57, and the overhanging pressure of the air cylinder 103 is released. In other words, the connection with the power transmission source is cut off, and the hammer lever 43 is prevented from hitting the pulley 29. Third
The device shown in the figure, that is, the pressing element, is provided at both points F and A in FIG. Moving. The present invention is controlled on the premise that the bag is held in a normal state by a clamp at point A, and then the opening of the bag is reliably opened. However, at point A, the bag is not fed. In such cases, for example, B.
If it is detected that the opening state of the bag is abnormal by electrically detecting the movement of the spatula opening the bag at point A, the empty bag is recycled once or several times, and then the empty bag is opened at point A. A control device is used that causes the bag to be removed from the clamp.

Further, as shown in FIG. 2, a switch 50 is connected to the circuit of the switching valve 36 via a controller 57.
When the switch 50 does not detect the filling of the packaged material, the switching valve 36 is switched to eliminate the vacuum suction force of the vacuum cup 33, and the packaging bag 13 is moved against the clamp.
supply will be discontinued.

In FIG. 3, the pressure of the air cylinder 103 is released so that the hammer lever 43 does not generate any pushing force, but as shown in FIG. When the clutch 50 is engaged and the switch does not detect the filling of the packaged material, the clutch 104 can be used to cut off the power transmission source so that no power is transmitted to the pressing element or hammer lever 43.

(Effects) A rotary bagging and packaging device is provided with a switch that operates when it is detected that the packaging bag is filled with an object to be packaged, and the switch is connected to a control mechanism of a power transmission system of a pressing element that opens the clamp, and the If the switch does not confirm the filling of the packaged items, the power transmission system is not moved, so if the packaging bag cannot be filled with the packaged items, the clamp automatically clamps the packaging bag. Since the packaging bag can be recycled as it is by preventing it from being opened, it is possible to reuse the bag without accumulating empty bags at the release position as in conventional products.

[Brief explanation of drawings]

Fig. 1 shows an embodiment of the present invention; Fig. 2 is a partial side view of the bag feeding section shown in the previous figure, and Fig. 3 is a partial side view of the bag feeding section shown in the previous figure. FIG. 4 is a partial side view, FIG. 4 is a view taken along the - line in the previous figure, FIG. 5 is a side view of a seal portion, and FIG. 6 is an explanatory view of another embodiment. 10...rotor, 11...clamp, 20...
... Clamp arm, 29 ... Pulley, 33 ... Vacuum cup, 35 ... Vacuum pump, 36 ... Opening/closing valve,
43...Press element, 44...Groove cam, 50...Switch, 51...Air cylinder, 52...Compressor, 53...Switching valve, 55...Scale plate, 56...Pulse detector, 57... controller.

Claims (1)

[Claims] 1 A means for attaching a large number of clamps closed by the force of springs at equal intervals around the circumference of a rotor, and intermittently rotating the rotor and each clamp together at the same pitch as the attachment interval of each of these clamps, and a means for each of the clamps to be endless. means for opening the clamp against the spring force by the pressing force of a first pressing element at the first stop position during one rotation of the orbit; and means for feeding the packaging bag to the opened clamp; means for filling the packaging bag supported by the clamp at a stop position thereof, and a means for opening the clamp and releasing the packaging bag by a pressing force from a second pressing element at a stop position at the rear thereof; In the bagging and packaging apparatus constructed by the above means, a switch is provided to detect the state of filling of the object to be packaged into the packaging bag supported by the clamp, and the switch confirms the filling of the object to be packaged. A bag filling and packaging device configured to cut off the pressing force of both of the pressing elements and the bag feeding action of the bag feeding means in response to a signal from the switch.