JP2011073777A - Bag discharge auxiliary device in bagging and packaging machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bag discharge device for reliably discharging (dropping) a bag even when a product bag or a defective bag (empty bag) sticks to a gripper or a cooling plate in a bagging and packing machine. <P>SOLUTION: The bag discharging device includes a chute 21 and a rotator 23 which are disposed across a transportation channel of the bag at a bag discharge position at which the bag 3 is discharged from the gripper 2. The chute moves between a pickup position brought into contact with one bag surface of the bag 3 and a retracting position to avoid the interference with the bag in the transportation channel. The rotator moves between the pickup position brought into contact with the other bag surface of the bag and the retracting position so as to avoid the interference with the bag in the transportation channel and is brought into contact with the bag surface to rotate counterclockwise. The bag is clamped by the chute and the rotator at the pickup position from both sides, and the rotator is rotated to apply downward force to the bag. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention is used when a product bag that has been packed by a bagging and packaging machine and whose bag mouth is sealed or a defective bag (empty bag) that has not been packed due to defective opening or the like is discharged to the outside of the machine. The present invention relates to a bag discharge assist device.

FIG. 8 shows an example of a general intermittent rotation type bag filling and packaging machine, in which a plurality of gripper pairs (a pair of grippers) 2 are disposed around a table 1 that rotates intermittently in one direction (the direction of a white arrow). 2 are arranged at equal intervals, and as the table 1 is intermittently rotated, the gripper pairs 2 and 2 are intermittently moved along the circular transfer path, and the gripper pair 2 and 2 are rotated while the gripper pair 2 is rotated once. Various packaging processing steps such as supplying the bag 3 to the bag (feeding the bag), filling the package 3 with the grippers 2 and 2 sandwiched on both side edges, and sealing the bag mouth of the bag 3 are performed. The The transfer path of the gripper pairs 2 and 2 is also the transfer path of the bag 3.
Specifically, referring to FIG. 8, the stop position I is a bag feeding process position, and a conveyor magazine type bag feeding device 4 for feeding the bag 3 to the gripper pair 2, 2 is arranged and the supplied bag 3. Are gripped by the gripper pairs 2 and 2 at both side edges near the bag mouth and suspended with the bag mouth facing upward.

  A stop position II is a printing process position, and a printing device (only the printer 5 is shown) for printing the date and the like is arranged on the bag surface of the bag 3 sandwiched between the gripper pairs 2 and 2, and the stop position III is at the bag mouth. An opening device (suction cups 6, 6 and follow-up type opening guides 7, 7 is shown) having a pair of suction members (suction cups) 6, 6 and a pair of follow-up type opening guides 7, 7 that are open process positions The stop position IV is an article filling process position, and a filling device (only the hopper 8 is shown) having a hopper 8 that moves up and down is arranged. The follow-up type opening guides 7 and 7 are inserted into the bag mouth opened at the stop position III and immediately opened to maintain the opening state of the bag mouth, and the table 1 is rotated as it is (the gripper pairs 2 and 2 and the bag 3). The hopper 8 is inserted into the bag mouth at the stop position IV and then lifts out of the bag mouth and immediately returns to the stop position III.

The stop position V is a first gas replacement process position, a first gas replacement device (only the gas injection nozzle 9 is shown) having a gas blowing nozzle 9 that moves up and down is arranged, and the stop position VI is a second gas replacement process position. A second gas displacement device (only the gas blowing nozzle 11 is shown) having a gas blowing nozzle 11 that moves up and down is arranged. At the stop position VI, the gap between the gripper pair 2 and 2 is widened and the bag mouth is tensioned.
The stop position VII is a first sealing process position, a first sealing device having only a pair of first hot plates 12 and 12 that are opened and closed (only the first hot plates 12 and 12 are shown) is disposed, and the stop position VIII is a second position. A second sealing device having a pair of second hot plates 13 and 13 (only the second hot plates 13 and 13 are shown) is disposed at a sealing process position, and a stop position IX is a sealing part cooling and product bag discharging process position. A cooling device having only a pair of cooling plates 14 and 14 (only the cooling plates 14 and 14 are shown) and a chute 15 are arranged.
The stop position X is a defective bag discharge process position, and here, a defective bag (for example, an empty bag that has not been packed due to defective opening or the like) is discharged.

  At the stop position IX, the cooling plates 14 and 14 and the pair of grippers 2 and 2 are opened, the product bag 3A is unclamped, and the product bag 3A naturally falls on the chute 15 due to its weight and is guided on the chute 15. Then, it is sent onto a conveying device such as a belt conveyor (not shown), and is carried out toward a predetermined position by the conveying device (see Patent Document 1). In addition, when the bag sandwiched between the gripper pair 2 and 2 is a defective bag, the gripper pair 2 and 2 opens at the stop position X, and the defective bag spontaneously falls due to its own weight, for example, directly into a container such as a box placed below. Or it accommodates via the chute | shoot etc. which are not shown in figure.

However, it is relatively light even if it includes a packaged product that is filled with the weight of the product bag, or a defective bag that is released as an empty bag due to a defective opening (filling the packaged product based on the defective opening detection signal). In the case of a bag that has not been sealed, the following problems arise.
In intermittent rotation type bagging and packaging machines, gripping force of grippers is generally set firmly so that the bags do not slip or come off from the grippers during transfer with the gripper pair gripping both side edges of the bag. . Therefore, when releasing the product bag or the defective bag out of the machine, even if the gripper is opened, the side edge of the bag is stuck to the gripping surface of the gripper, and the bag is not released (does not fall). Occurs. Alternatively, as shown in FIG. 8, when the cooling process of the seal part and the bag discharging process are performed at the same stop position, the seal part is attached to the clamping surface of the cooling plate that clamps the seal part of the bag. This causes a problem that the bag is not released (does not fall). Moreover, even if it falls off from the gripping surface of the gripper or the clamping surface of the cooling plate due to its own weight, the falling timing may be shifted or the dropping posture may be disturbed, which may hinder subsequent processing.

On the other hand, the discharge device described in Patent Document 2 is for taking out a product bag that has been vacuum-treated and sealed in a vacuum chamber, and the product bag adheres to a hot plate or a chuck in the vacuum chamber and falls naturally. In order to prevent such a situation from happening, the product bag is sucked with a suction cup, taken out from the vacuum chamber, and dropped onto the belt conveyor.
In order to discharge product bags and defective bags (empty bags) in the intermittently rotating bag filling and packaging machine of FIG. 8, this discharge device can be applied to the seal portion cooling and product bag discharging process position and defective bag discharging process position. Although it is conceivable, the bag surface of the product bag (the part where the suction cup adsorbs) may bulge unevenly for each bag, or even an empty bag (defective bag) may be unevenly curved for each bag. Since there are many, there exists a possibility that adsorption | suction defect may arise and it cannot be said that the said problem can be solved stably.

  The carry-out device described in Patent Document 3 is such that the upper edge of the product bag is grasped with a clamping claw at the product bag discharge process position, moved horizontally immediately above a predetermined position on the carry-out conveyor, and dropped. In order to discharge product bags and defective bags (empty bags) in a rotary bagging and packaging machine, it is conceivable to apply this carry-out device to the seal portion cooling and product bag discharging process position or defective bag discharging process position. However, there is a possibility that the product bag or the defective bag (empty bag) may stick to the holding surface of the holding claw of the carry-out device this time, and it cannot be said that the above problem can be solved reliably. Moreover, when it applies to a seal part cooling and a product bag discharge process position, there exists a possibility that interference with a cooling plate may arise.

Japanese Utility Model Publication No. 7-23721 No. 8-8968 Japanese Patent No. 3984740

  The present invention has been made in view of the above-described conventional problems, and even when a product bag or a defective bag is stuck to a gripper or a cooling plate of a packaging machine, the bag is attached at a predetermined timing, and An object of the present invention is to provide a bag discharge assisting device that can be reliably discharged (dropped) in a stable posture.

  The bag discharge assisting device according to the present invention (Claim 1) holds both side edges near the bag mouth with a pair of left and right grippers to hold the bag in a suspended manner, and intermittently along a predetermined transfer path. In addition to being transferred, it is applied to an intermittent transfer type vertical bagging and packaging machine that performs a packaging process such as opening of a bag mouth, filling of an object to be packaged, sealing of a bag mouth in the course of transfer, A chute and a rotating body are disposed so as to sandwich the transfer path in the vicinity of a stop position where the bag is discharged from the gripper in the transfer path, and the chute is one bag surface of the bag stopped at the stop position Moving between a take-out position that contacts the bag and a retreat position that avoids interference with the bag on the transfer path, guides the fall of the bag released at the stop position at the take-out position, and the rotating body The other side of the bag stopped at the stop position It moves between a take-out position that contacts the bag surface and a retreat position that avoids interference with the bag on the transfer path, and rotates so as to rotate downward on the bag surface side. The bag stopped at the stop position is sandwiched from both sides, and the rotation of the rotating body applies a downward force to the bag.

As a desirable mode of the bag discharge assisting device, the rotating body is, for example, an impeller, a portion corresponding to the blade is formed of a rubber plate extending in a radial direction, and the rubber plate is stopped at the stop position at the take-out position. The rotating body is, for example, in the form of a roller, and at least the outer peripheral surface in contact with the bag is made of rubber (Claim 3).
As an intermittent transfer type vertical bagging and packaging machine to which the bag discharge assist device is applied, for example, a plurality of pairs of grippers are arranged at equal intervals around a table that rotates intermittently, and the grippers are moved along with the intermittent rotation of the table. A bagging and packaging machine that moves along a circular transfer path is mentioned.

According to the bag discharge assisting device according to the present invention, when a gripper, a cooling plate or the like holding the bag is opened at the product bag discharge process position or the defective bag discharge process position, the product bag or the defective bag is temporarily Even if the bag is attached to the cooling plate, the bag can be reliably discharged (dropped) at a predetermined timing and in a stable posture.
Further, the bag discharge assisting device according to the present invention is based on the discharge device (chute) described in Patent Document 1 as the structure of the device, and includes a rotating body and its driving mechanism (mechanism for rotation and movement). ), It can be finished with a small and simple structure, and is easy to clean and maintain.

It is a side view of the bag discharge | release assistance apparatus which concerns on this invention. It is a front view of the bag discharge auxiliary device according to the present invention. It is an AA arrow line view of FIG. It is operation | movement explanatory drawing of the bag discharge | release assistance apparatus which concerns on this invention. It is operation | movement explanatory drawing of the bag discharge | release assistance apparatus which concerns on this invention. It is operation | movement explanatory drawing of the bag discharge | release assistance apparatus which concerns on this invention. It is operation | movement explanatory drawing of another bag discharge | release assistance apparatus which concerns on this invention. [BRIEF DESCRIPTION OF THE DRAWINGS] It is a perspective view of the intermittent rotation type bag filling packaging machine which can apply the bag discharge | release assistance apparatus based on this invention.

Next, referring to FIG. 1 to FIG. 7, the bag discharge assisting device according to the present invention (installed in place of the chute 15 at the seal part cooling and product bag discharge process position of the intermittent rotation type bag filling and packaging machine shown in FIG. 8). Will be described in detail.
As shown in FIGS. 1 to 3, the bag discharge assisting device includes a chute 21, a moving mechanism 22, a rotating body (impeller) 23, a rotating mechanism 24, and a moving mechanism 25. Below the chute 21, an intermittently driven belt conveyor 26 for carrying out the product bag 3A is installed.

The chute 21 has a sliding surface facing the outer diameter of the transfer path of the bag 3 at the sealing portion cooling and product bag discharging process position of the intermittently rotating bag filling and packaging machine, and the back side of the bag 3 stopped at the position ( It is arranged on the inner side of the transfer path and comprises a substantially vertical upper part 21a and a curved lower part 21b.
The moving mechanism 22 includes a stand 27 installed on the upper surface of the machine base of the intermittently rotating bagging and packaging machine, an air cylinder 28 fixed to the stand 27, a plate portion 30 fixed to the tip of the rod portion 29 of the air cylinder 28, It comprises a bracket 31 fixed to the plate portion 30, a horizontal shaft 32 fixed to the bracket 31, and a chute mounting block 33 fixed to the horizontal shaft 32.
The chute 21 moves (advances and retreats) in a horizontal plane along a plane perpendicular to the transfer path when the air cylinder 28 operates. Advancing to reach the take-out position, contacting the back side bag surface of the bag 3, retreating to the retracted position (position shown in FIG. 1), and interference with the bag 3 transferred along the transfer path. avoid.

A rotating body (impeller) 23 includes a shaft portion 35 (part corresponding to an impeller wheel) fixed to a rotating shaft 34 extending in a tangential direction at the seal portion cooling and product bag discharging process position of the transfer path, and The rubber plate 36 includes a plurality of rectangular rubber plates 36 provided at equal intervals around the shaft portion 35. Each rubber plate 36 extends in a radial direction from the shaft portion 35, and an outer peripheral end thereof is centered on the axis of the rotating body 23. Located on the circumference of the virtual cylinder.
The rotating mechanism 24 includes a portal frame 37 installed on the upper surface of the machine base of the intermittently rotating bagging and packaging machine, a motor 38 installed on a leg portion 37a of the portal frame 37, and a top surface 37b of the portal frame 37. A swing fulcrum shaft 41 rotatably supported by a fixed support block 39, the rotary shaft 34 rotatably supported by a swing arm 42 fixed to the swing fulcrum shaft 41, and an output shaft of the motor 38. A pulley 43 fixed to the swinging shaft, a two-hanging pulley 44 rotatably supported on the swing fulcrum shaft 41, a pulley 45 fixed to the rotating shaft 34, a belt 46 stretched between the pulley 43 and the pulley 44, And a belt 47 stretched between the pulley 44 and the pulley 45.

The moving mechanism 25 is fixed to a bracket 48 fixed to the lower surface of the top plate 37b of the portal frame 37, an air cylinder 51 rotatably supported by the bracket 48 via a support shaft 49, and a rod portion tip of the air cylinder 51. In addition to the drive lever 53 having one end rotatably supported by the connection member 52 and the other end fixed to the swing fulcrum shaft 41, the swing fulcrum shaft 41, the swing arm 42, and the rotation. It consists of a shaft 34 and the like.
Two rotating bodies 23 having a width smaller than the bag width are fixed to the rotating shaft 34 with a predetermined interval therebetween. When the air cylinder 51 is operated, the driving lever 53, the swinging fulcrum shaft 41, the swinging arm 42, and the like. It swings back and forth along a plane perpendicular to the transfer path about the swing fulcrum shaft 41 via the rotation shaft 34. More specifically, it has moved forward and reached the take-out position, contacted with the surface side bag surface of the bag 3, moved backward and reached the retracted position (position shown in FIG. 1), and has been transferred along the transfer path. Avoid interference with bag 3. In addition, the rotating body 23 rotates in a direction in which the moving direction of the circumference on the side facing the bag 3 is downward when the motor 38 is operated.

Next, with reference to FIGS. 4 to 6, an example of the cooling and discharging process at the seal portion cooling and product bag discharging process position will be described in order, focusing on the operation of the bag discharge assisting device.
(1) In FIG. 4A, the bag 3 filled with an article to be packaged and sealed at the upper edge seal portion is sandwiched between the gripper pairs 2 and 2 and transferred to the seal portion cooling and product bag discharge process position. The state when the vehicle stops at the position is shown. At this time, the cooling plates 14 and 14 are open, the chute 21 and the rotating body 23 are in the retracted position, and the rotating body 23 is stopped.
(2) As shown in FIG. 4 (b), the cooling plates 14 and 14 are closed to sandwich the seal portion of the bag 3. At this stage, the chute 21 and the rotating body 23 remain stopped at the retracted position.

(3) As shown in FIG. 5 (a), the air cylinder 28 is operated to advance the chute 21, reach the take-out position, the upper portion 21a comes into contact with the back side bag surface of the bag 3, and the air cylinder 51 The rotating body 23 operates to advance, reach the take-out position, and the blade portion (rubber plate 36) comes into contact with the front surface side bag surface of the bag 3. At this time, the bag 3 is sandwiched between the chute 21 and the rotating body 23 from both sides. Subsequently, the gripper pairs 2 and 2 are opened, and both side edges of the bag 3 are released. FIG. 5A shows the state at this time.
(4) As shown in FIG. 5 (b), the cooling plates 14 and 14 are opened, and the seal portion of the bag 3 is released. At the same time, the motor 38 is operated to rotate the rotating body 23 in the direction of the arrow (the direction in which the moving direction facing the bag 3 is downward). Since the bag 3 (which may be referred to as the product bag 3A since the packaging process is completed) is sandwiched between the chute 21 and the rotating body 23, and the rotating body 23 rotates in this state, the rubber plate 36 of the rotating body 23 Due to the frictional force acting between the product bag 3A and the bag surface, a downward force (a force that scrapes down) is applied to the product bag 3A.

(5) Due to the scraping action of the rotating body 23, both side edges and the seal part of the product bag 3A are forced from the gripping surfaces of the gripper pairs 2 and 2 and the cooling plates 14 and 14, as shown in FIG. It is peeled off (even if it is stuck), released downward, guided by the chute 21 and dropped toward the carry-out conveyor 26.
(6) After the product bag 3A is transferred onto the transport conveyor 26, the transport conveyor 26 operates to transport the product bag 3A. The conveyor 26 has been temporarily stopped before the product bag 3A is transferred. On the other hand, the rotation of the rotating body 23 is stopped, and the chute 21 and the rotating body 23 are retracted to the retracted position as shown in FIG. 6B.

Note that the operation timings of the bag discharge assisting device (chute 21, rotating body 23), gripper pairs 2, 2 and cooling plates 14, 14 described in (1) to (6) above are merely examples. For example, in the above example, after the cooling plates 14 and 14 sandwich the seal portion of the bag 3, the chute 21 and the rotating body 23 are moved to the take-out position, and then the gripper pair 2 and 2 are opened. It is also possible to move the chute 21 and the rotating body 23 to the take-out position at the same time that the pins 14 and 14 hold the seal portion of the bag 3 or immediately after the gripper pair 2 or 2 is opened. Alternatively, in the above example, the rotating body 23 is rotated simultaneously with the opening of the cooling plates 14, 14. However, the rotation of the rotating body 23 can be started immediately before the cooling plates 14, 14 are opened, and the removal is performed. You can also start the rotation before reaching the position. Furthermore, other operation timings can be arbitrarily set within the scope of the object of the present invention.
Further, although the conveyor 26 is intermittently driven, it may be continuously driven. However, in the case of continuous driving, when the product bag 3A is transferred from the chute 21 onto the transport conveyor 26, the bag posture may be disturbed, the transfer timing may be shifted, and the carry-out pitch may be disturbed on the transport conveyor 26. Such an intermittent drive type is desirable.

  FIG. 7 shows another bag discharge assisting device, which is different from the rotating body 23 shown in FIGS. 1 to 6 in that the rotating body 23 is composed of a rubber roller (a cylindrical rubber roller fitted on the rotating shaft 34). The same in other respects. Since this rotating body 23 is made of rubber at the entire circumference of the portion that contacts the bag surface of the product bag 3, a high frictional force is generated between the rotating body 23 and the bag surface that contacts the rotating bag 23, and a more reliable downward scraping action is produced. can get.

In addition, the bag discharge | release assistance apparatus which concerns on this invention is not restricted to said example, For example, the following various modifications are possible.
In the above example, the chute 21 is moved horizontally between the retracted position and the take-out position.
In the above example, the rotating body 23 swings and moves between the retracted position and the take-out position. However, the rotating body 23 may follow another moving path such as a horizontal moving type like the chute 21.
-In the above example, the rotating body 23 has two narrower than the bag width of the bag 3 and is installed at a predetermined interval in the bag width direction. Only one piece may be installed. Or you may install the thing of the width | variety equivalent to the bag width of the bag 3, or wider (for example, the maximum bag width level which a packaging machine can respond).

-Although the said bag discharge | release assistance apparatus was installed in the seal | sticker part cooling and product bag discharge process position of the intermittent rotation type bag filling packaging machine shown in FIG. 8 in said example, it can be installed also in a defective bag discharge process position. . In addition, as shown in FIG. 8, the gripper pair and the bag are not limited to the intermittent rotary bagging and packaging machine in which the bag moves along the circular transfer path, but also a packaging machine having a race track type transfer path or a linear transfer path. In addition, it is applicable to the product bag discharge process position and / or the defective bag discharge process position of the intermittent transfer type vertical bag filling and packaging machine in general. In addition, a vertical type means the type which receives various packaging processes in the state which the bag pinched | interposed into the gripper has the bag mouth facing up.

2 Gripper 3 Bag 3A Product bag 14 Cooling plate 21 Chute 23 Rotating body 28 Air cylinder 36 Rubber plate 38 Motor 42 Swing arm 51 Air cylinder

Claims (4)

Hold the bag in a suspended state by holding both side edges near the bag mouth with a pair of left and right grippers, and intermittently transfer the bag along a predetermined transfer path. This is a bag discharge assisting device applied to an intermittent transfer type vertical bagging and packaging machine that performs packaging processing steps such as filling of products and sealing of bag mouths, and the bag is discharged from the gripper in the transfer path. A chute and a rotating body arranged so as to sandwich the transfer path in the vicinity of the stop position, and the chute has a take-out position that contacts one bag surface of the bag stopped at the stop position, and a position on the transfer path. Move between retreat positions to avoid interference with the bag, guide the drop of the bag released at the stop position at the take-out position, the rotating body on the other bag surface of the bag stopped at the stop position The take-out position to contact, and Move between the retreat positions to avoid interference with the bags on the feeding path, rotate so as to rotate downward on the bag surface side, and the chute and the rotating body are stopped at the stop position at the take-out position on both sides. A bag discharge assisting device characterized in that the rotation of the rotating body adds a downward force to the bag. The rotating body has an impeller shape, and a portion corresponding to the blade is formed of a rubber plate extending in a radial direction, and the rubber plate contacts a bag surface of the bag stopped at the stop position at the take-out position. The bag discharge assisting device according to claim 1. The bag discharge assisting device according to claim 1, wherein the rotating body is in a roller shape, and at least an outer peripheral surface in contact with the bag is made of rubber. In the intermittent transfer type vertical bagging and packaging machine, a plurality of pairs of grippers are arranged at equal intervals around a table that rotates intermittently, and the grippers move along a circular transfer path along with the intermittent rotation of the table. The bag discharge assisting device according to any one of claims 1 to 3, wherein the bag discharge assisting device is a mold bag filling and packaging machine.

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