JP2009248975A - Packaging bag-storing devie - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the supplying interval of a new packaging bag to a packaging bag-supplying device to a packaging machine. <P>SOLUTION: A monitoring plate 41 erected from a guide wall 15A includes an infrared rays type sensor 42, and monitors the existence of a bottom edge of a bulky packaging bag 11 carried on a conveyor belt 12 from the upper part as an arrow mark 21. On an opening edge side of the bulky packaging bag 11, a carrying-out suction cup 25 for carrying out the packaging bag 10 toward a packaging machine is positioned, and an auxiliary suction cup 24 is arranged on the upper part of the bottom edge of the packaging bag 10. The amount of movement of turning over of the bottom edge by the auxiliary suction cup 24 is reduced and more accelerated than the carrying-out suction cup 25 with a larger amount of movement, to early monitor the decreasing condition of the bulky packaging bag 11. When the packaging bag disappears, a motor is started by a signal for detecting a vacuum pressure changing by the carrying-out sucking cup 25 sucking the packaging bag, and a new bulky packaging bag 11 is supplemented by the conveyor belt 12. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention is to sequentially replenish a certain amount of wrapping bags to an automatic wrapping machine that fills and packs the packages in each wrapping bag that moves at equal intervals along an endless track. The present invention relates to a bag storage device.

  For example, in a food manufacturing company, a manufactured food product is packaged in a bag with a packaging machine from one to the next, and in order to continuously operate the packaging machine, a certain amount of packaging used for bagging is used. Bags need to be replenished sequentially according to consumption. For this purpose, in Patent Document 1 below, a sensor detects that the most bulky wrapping bag has been consumed by arranging a plurality of stacked wrapping bags on a conveyor belt in parallel at a plurality of lateral positions. Then, an apparatus for automatically advancing the conveyor belt by one pitch and replenishing the subsequent bulky bag to the installation position of the packaging machine is disclosed.

  However, the sensor detects that the wrapping bag on the conveyor belt has been consumed, the detection signal triggers the conveyor, and the time required to replenish the subsequent bulky wrapping bag at the packaging machine installation position is In order to carry out continuous wrapping, the operating capacity of the wrapping machine has been lowered in accordance with the movement of the conveyor belt. There was a reality that at least one bag dropout portion was formed only during the operation of replenishing the bulky bag with the conveyor belt.

  Numerically, for example, in a packaging machine that transports packing bags supported by clamps at equal intervals along a circular track and fills each packing bag with a package in the circular track, a packing bag with a small area is used. As the filling efficiency increases, filling of more than min / 30 bags is possible. When such a number of packages is set as a target, the delivery operation of the packaging bag to the clamp, the filling operation of the packaging material to the packaging bag, and the welding operation of the opening edge of the packaging bag, each of these work steps are performed for 2 seconds. It becomes a setting less than that, and new replenishment becomes difficult in time. In other words, the inertia at the time of starting and stopping the conveyor belt acts on the stacked wrapping bag, and if the inertia acts too much, the stacked wrapping bag gets over the partition wall and collapses, so the conveyor belt is faster than necessary. This made it impossible to refill new bags continuously.

JP-A-7-2225

  An object of the present invention is to further shorten the connection time for replenishment of wrapped bags by a conveyor belt in which stacked bulky bags are arranged in parallel at a plurality of lateral positions.

  In order to achieve the above object, in order to achieve the above object, the present invention provides a bulky wrapping bag formed by overlapping a plurality of wrapping bags on a conveyor belt between a pair of guide walls on both sides of the conveyor belt. It is a storage device that is placed sideways and with a carry-out sucker that sucks to the bag mouth side of the front bulky packaging bag facing in the direction of rotation of the conveyor belt, and sequentially transports each packaging bag toward the packaging machine, A sensor that detects the presence of the bottom edge of the bag and an operating device that reverses the auxiliary sucker are installed on the guide wall on the bottom edge side of the bag, and each time the bag is taken out by the carry-out sucker, the momentum of the carry-out sucker is determined in advance. If the bottom edge of the lower wrapping bag is detected by the sensor by turning the bottom edge of the wrapping bag with the auxiliary sucker having a small momentum, and the bottom edge of the wrapping bag is not detected, the non-detection signal, Detecting the suction confirmation to the bag mouth by the unloading suction cup With between signals from the sky sensor, configured to replenish the subsequent bulky dressing to start the conveyor belt.

  The unloading suction cup that adsorbs to the opening edge of the sachet and carries the sachet slowly starts so as not to pull out the two sachets at the same time due to static electricity or friction between the upper and lower wrapping bags. Although the setting is made, the auxiliary sucker does not take out the wrapped bag even if the two wrapped bags are turned, so the momentum can be set smaller and faster than the carry-out sucker. Therefore, the auxiliary sucker can turn the bottom edge of the wrapping bag out of the sensor detection area at a higher speed than the unloading sucker, and if the sensor cannot detect the last wrapping bag, it is ready for refilling. Since the conveyor belt is started at the same time as the unloading sucker is adsorbed to the last packing bag, the unloading sucker moves as before and waits for the packing bag to disappear from the detection area of the sensor before refilling the bulky packing bag. Compared to the one that performs, there is an effect that the timing of refilling the wrapping bag is advanced.

  The conveyor belt 12 shown in FIG. 2 includes a partition wall 13 that prevents the bulky bag 11 stacked on the upper surface thereof from moving in the lateral width direction, and a pair of guide walls 14 along the conveyor belt 12 on both sides. 15, and the bulky bag 11 is intermittently moved between the guide walls 14 and 15 together with the conveyor belt 12.

  As shown in FIG. 3, which is a front view, the conveyor belt 12 supported by the pulley 16 is supported on two sides by two chains 18 and 19 engaged with two chain wheels 17. In the drawing, the guide wall 14 on the left hand is fixed to the machine base 20 and is stationary, but the guide wall 15 on the right hand is an inverted L-shaped bracket 22 fixed to the machine base 20 in the length direction of the bag. Is slidable in the direction of the arrow.

  In the bag feeding section 40 where the wrapping bag 10 is stopped in FIG. 2, an unloading suction cup 25 is disposed that sucks and unloads the uppermost wrapping bag 10 of the stacked bulky wrapping bag 11. Only in the bag supply section 40, the guide wall 15 at the bottom edge of the bag is a box type 15A. In FIG. 3, the screw 23 engaged with the long hole formed in the lower surface of the box type guide wall 15A is loosened. The guide wall 15A is slidably supported on the bracket 22. The slide adjustment can be performed by rotating the screw rod 26, and as a result, adjustment according to the length of the wrapping bag can be performed.

  As shown in FIG. 1, the monitoring plate 41 erected from the guide wall 15 </ b> A is provided with an infrared sensor 42 at the top, and the presence of the bottom edge of the bulky bag 11 loaded on the conveyor belt 12 is indicated by an arrow 21. To monitor from the top. Further, an auxiliary suction cup 24 is disposed on the upper bottom edge of the bag 10.

  FIG. 4 shows an operating device 70 for operating the auxiliary suction cup 24 fixed to the vertically long support board 39. The lowermost link 31 in the operating device has a pin 32 fixed to a bracket 29 integral with the box-shaped guide wall 15A as an axis, and the upper link 33 has a pin 34 fixed to the bracket 29 as an axis. The triangular board 35 is connected to the two pins 36. The pin 43 at the lower end of the support board 39 is pivotally supported on the triangular board 35, and the pulling force of the pulling spring 44 presses the pulley 46 provided on the triangular board 39 against the lower surface of the horizontal rail 45.

  In short, the two links 31 and 33 function as parallel links. When the triangular board 35 is pushed downward via the rod 38, the pulling force of the pulling spring 44 and the movement of the pulley 46 by the horizontal rail 45 are prevented. As a result, the support disc 39 is lowered with a pin 43 on the lower side and the auxiliary suction cup 24 is lowered into a parabolic shape having a relatively small radius, and is pressed against the bottom edge of the bulky bag on the conveyor belt 12 and sucked. On the other hand, when the triangular board 35 is pulled up from the rod 38, the pulley 46 in the support board 39 has a blocking force acting on the lower surface of the rail 45. Therefore, the support spring 39 extends the auxiliary suction cup 24 by extending the pull spring 44. It moves up along the parabola around 43. That is, in FIG. 1, the auxiliary sucker 24 has an arrow, and the bottom edge of the wrapping bag 10 is turned up outside the detection area by the sensor 42, while the carry-out sucker 25 sucks and carries the opening edge of the wrapping bag 10.

FIG. 5 illustrates a line 53 that connects the carry-out suction cup 25 that sucks the opening edge of the bag 10 and the auxiliary suction cup 24 that sucks the bottom edge of the bag to the vacuum pump 50 via the switching valves 51 and 52. The vacuum cage 54 installed in the line connects the signal circuit 55 to the controller 56, and the instruction circuits 57 and 58 from the controller 56 are connected to the solenoid parts of the switching valves.

  On the other hand, FIG. 6 shows the movement trajectory of the carry-out suction cup 25 at the upper part and the movement trajectory of the auxiliary suction cup 24 at the lower part at {circle around (0)} gate. When the unloading suction cup 25 is attracted to the opening edge of the bag at the position of the symbol D1, the bag is unloaded from the conveyor belt by the movement corresponding to the symbol A, and is delivered in the direction of the packaging machine in the time corresponding to the symbol B. Then, after returning to the position of the bulky bag over time corresponding to the symbol A, it is adsorbed to the opening edge of the new bag during the time corresponding to the symbol C, and the unpacking is repeatedly carried out again starting from the symbol D2. .

  On the other hand, the auxiliary sucker 24 is configured to adsorb to the bottom edge of the wrapping bag in a time corresponding to the symbol E and repeat the movement of turning the bottom edge with a momentum equivalent to the symbol F, and the point G to turn the bottom edge of the wrapping bag with a small momentum. The vacuum dropper 54 in FIG. 5 detects the pressure drop at the moment when the unloading suction cup 25 waits ahead of the point D2 where the unpacking bag is unloaded and the unloading suction cup 25 adsorbs to the opening edge of the packing bag. Then, the signal is transmitted to the controller 56, and the motor 59 is activated by a signal from the controller 56. That is, the conveyor belt 12 in FIG. 2 moves forward by 1 pitch by the rotational power of the motor and carries the new bulky bag 11 into the lower area of the carry-out suction cup 25.

  FIG. 7 shows a system in which a bulky wrapping bag 11 is mounted in the longitudinal direction in the conveying direction of the conveyor belt 12, and the conveyor belt has a partition wall 13 to which the opening edge of the bulky wrapping bag 11 is attached. The chain 18 supports a movable partition wall 60 attached to the bottom edge of the bag with a screw 61 and loosens the screw 61 so that the movable partition wall 60 corresponds to the length of the bulky bag 11 in the vertical direction. Displaceable.

  As shown in FIG. 8, the L-shaped movable partition wall 60 located on the conveyor belt 12 is supported by mounting the bottom edge of the bulky packaging bag 11, and when the bulky packaging bag 11 is no longer consumed, the movable partition wall 60. The flat surface portion functions as a reflector for the infrared ray 21 of the sensor.

  In FIG. 7, a position adjusting device 64 having a guide 63 parallel to the conveying direction of the conveyor belt 12 is provided, a sensor 67 is provided at the tip of an arm 66 protruding from the movable block 65 supported by the guide 63, and the screw 68 is rotated. Thus, the sensor 67 can be adjusted to a position that coincides with the bottom edge even if the length of the bulky bag 11 changes. The arm 66 also supports the operating device 70 of the auxiliary suction cup 24 shown in FIG. 4 via the bracket 29, and when changing the size of the bulky packaging 11 to be transported, it is integrated with the sensor 67 in accordance with the packaging. The position of the auxiliary suction cup 24 can be changed.

  The auxiliary sucker 24 reduces its momentum and speeds it up, waits for the bottom edge of the bag to be turned up earlier than the carry-out sucker 25 with a large momentum, and at the same time as adsorbing to the opening edge of the bag by the carry-out sucker 25 Since the conveyor belt carrying the wrapping bag is started, there is an effect of increasing the possibility of continuous wrapping in the wrapping machine as the time interval for refilling the wrapping bag is narrower than the conventional one.

Explanation of symbols

10 ... Bag 11 ... Bulky bag 12 ... Conveyor belts 14 and 15 ... Guide walls 24 ... Auxiliary suction cup 25 ... Unloading suction cup 40 ... Bag feeding section 42 ... Sensor 50 ... Vacuum pump 54 ... Vacuum gauge 56 Controller 59 Motor 60 Movable partition 64 Position adjustment device 67 Sensor 70 Movable device

Explanatory drawing of taking out the packing bag which is a simplified diagram of FIG. Plan view of the previous figure Front view of the device Explanatory diagram of operating device of auxiliary suction cup Illustration of the control device Action diagram of suction cup Plan view of different embodiments Side view of previous figure

Claims (4)

Between the pair of guide walls on both sides of the conveyor belt, a bulky wrapping bag formed by overlapping a number of wrapping bags is placed sideways on the conveyor belt, and the most bulky wrapping bag of the foremost bulky wrapping bag in the direction of the conveyor belt rotation is placed. A storage device that, with a carry-out suction cup that sticks to the bag mouth side, sequentially carries out each bag toward the packaging machine,
On the guide wall on the bottom edge side of the wrapping bag, a sensor for detecting the presence of the bottom rim of the wrapping bag and an operating device for inverting the auxiliary sucker adsorbed on the bottom edge are installed.
Each time the bag is taken out by the carry-out sucker, the bottom edge of the lower bag is detected by the sensor by turning the bottom edge of the bag with the auxiliary sucker whose momentum is smaller than the momentum of the carry-out sucker. When the edge is not detected, the conveyor belt is started to replenish the subsequent bulky bandage with the non-detection signal and the signal from the vacuum sensor that detects the suction confirmation to the bag mouth by the carry-out suction cup. A storage device for wrapped bags. The bag storage device according to claim 1, wherein the guide wall on the bag rim side of the bag is freely adjustable in position in the length direction of the bag with the operation device and sensor of the auxiliary sucker. The edge of the bulky bag formed by stacking a large number of sachets is pressed against the guide wall arranged at equal intervals on the upper surface of the conveyor belt, and the bag of the most bulky sachet in the direction of rotation of the conveyor belt A storage device that, with a carry-out suction cup that sticks to the mouth side, sequentially carries out each sachet toward the packaging machine,
A position adjusting device is arranged on a guide parallel to the conveying direction of the conveyor belt, and a sensor for detecting the presence of the bottom edge of the bag is provided on the arm extended from the position adjusting device on the conveyor belt, and an auxiliary sucker. Set up an upside down operating device,
Each time the wrapping bag is taken out, the bottom edge of the lower wrapping bag is detected by the sensor by turning the bottom edge of the wrapping bag with the auxiliary sucker whose momentum is smaller than the momentum of the unloading sucker beforehand, and the bottom edge of the wrapping bag is detected If not, the non-detection signal and the signal from the vacuum sensor that detects the suction confirmation to the bag mouth by the carry-out suction cup are used to start the conveyor belt and replenish the subsequent bulky bandage. Bag storage device. 4. The bag storage apparatus according to claim 3, wherein the position of the auxiliary sucker operating device and the sensor is adjustable by a position adjusting device in the length direction in accordance with the change of the length of the bag.