JP2022018398A - Bag processing system - Google Patents

Abstract

To provide a bag processing system capable of retaining a bag with a simple device structure while suppressing damages applied to the bag.SOLUTION: A bag conveyance processing system 10 comprises a bag arrangement part 11, a relay conveyance device 12 and a processing unit 13. In the bag arrangement part 11, one or a plurality of bags 90 are arranged. The processing unit 13 includes a support device 40 that supports a delivered bag 90, and an opening device 44 that opens a mouth portion 91 of the bag 90 supported by the support device 40. The relay conveyance device 12 includes a bag transfer member 30 that transfers the bag 90 from the bag arrangement part 11 to the support device 40 while retaining the bag 90 by utilization of a Van der Waals force.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a bag processing system.

A system is known in which a bag taken out from a storage unit is transported while being held by a gripper, and processing such as packaging is performed on the bag at a plurality of stations.

In the packaging machine disclosed in Patent Document 1, bags taken out from the bag magazine one by one through a bag take-out suction cup are gripped by a gripper, and the mouth of the bag is opened by a pair of open suction cups.

Japanese Unexamined Patent Publication No. 2010-168053

When the bag is taken out using a suction cup, a large suction force is locally applied to the side surface of the bag, and a suction mark such as a wrinkle may be left on the side surface of the bag. Similarly, when the side surface of the bag is sucked by the sucker in the opening process of the bag, a suction mark may be left on the side surface of the bag. Also, when using a suction cup, it is essential to install a power source (for example, a vacuum pump) to bring suction force to the suction cup, but the installation of such a power source leads to complicated equipment configuration and an increase in equipment cost. It is also disadvantageous in terms of equipment space.

In addition, when the side of the bag is gripped by the gripper, the gripper is of a suitable size so that the bag is not misaligned or the bag is dropped in the process of performing various treatments (for example, content loading process) on the bag. It is required to firmly grip the bag body with the force of a bag. On the other hand, from the viewpoint of suppressing damage such as scratches that may be applied to the bag from the gripper, the gripper is required to gently grip the bag body with the suppressed gripping force.

The present disclosure has been made in view of the above circumstances, and an object of the present invention is to provide a technique capable of holding a bag with a simple device configuration while suppressing damage that may be applied to the bag.

One aspect of the present invention is a bag arrangement portion in which one or more bags are arranged, a support device for supporting the delivered bag, and an opening device for opening the mouth portion of the bag supported by the support device. The present invention relates to a bag transport processing system including a processing unit including a bag transfer unit and a relay transfer device including a bag transfer member that transfers the bag from a bag arrangement portion to a support device while holding the bag by using van der Waals force.

The bag transfer member transfers the bag from the bag arrangement portion to the support device while applying a van der Waals force only to one side surface portion of the bag so that the mouth portion of the bag becomes the head in the transfer direction. The bag may be transferred from the bag arrangement to the support device.

Another aspect of the present invention is a bag arrangement portion in which one or more bags are arranged, and at least one gripper that sandwiches and supports the delivered bag, and can hold the bag by utilizing Van der Waals force. The present invention relates to a bag transfer processing system including a processing unit including at least one gripper having a gripping surface, and a relay transfer device for transferring a bag from a bag arrangement portion to at least one gripper.

The at least one gripper may include a first gripper and a second gripper that support both sides of the bag, respectively.

Another aspect of the invention comprises a processing unit, the processing unit being a support device for supporting the bag to be passed and an opening device for opening the mouth of the bag supported by the support device, van der Waals. Includes an opening device that uses force to hold at least one of the sides of the bag while the one side and the other side of the bag act to separate from each other to open the mouth. , Related to bag transport processing system.

The opening device has a first opening holding portion for holding one side surface portion and a second opening holding portion for holding the other side surface portion of the bag, and the first opening holding portion and the second opening holding portion have. , Before one side and the other side move relative to each other, or at the same time as one side and the other side move relative to each other. The side surface portion may move relatively in the shifting direction including the component in the extending direction.

The bag arrangement unit may have a delivery device that sends out at least one bag downstream.

According to the present disclosure, it is possible to provide a technique capable of holding a bag with a simple device configuration while suppressing damage that may be applied to the bag.

FIG. 1 is a perspective view showing an example of a bag transport processing system. FIG. 2 is a side view showing another example of the bag arrangement portion and the relay transfer device. FIG. 3 is a side view showing another example of the bag arrangement portion and the relay transfer device. FIG. 4 is a front view showing an example of a support device (first gripper and second gripper). FIG. 5 is an upper view showing an example of a support device (particularly, a first gripper). FIG. 6 is an upper view showing an example of a support device (particularly, a first gripper). FIG. 7 is a side view showing an example of the opening device. FIG. 8 is an upper view showing an operation example of the opening device. FIG. 9 is an upper view showing another example of the first opening holding portion (opening device). FIG. 10 is an upper view showing another example of the first opening holding portion (opening device).

FIG. 1 is a perspective view showing an example of a bag transport processing system 10.

The bag transport processing system 10 includes a bag arrangement unit 11, a relay transport device 12, and a processing unit 13.

One or a plurality of bags 90 are arranged in the bag arrangement portion 11. Characteristics such as the shape and size of the bag 90 that can be arranged in the bag arrangement portion 11 are not limited. Generally, the bag is thin and flexible, and the side surface portion of the bag is prone to wrinkles and may be damaged such as scratches during transportation. The bag 90 used in the bag transport processing system 10 shown in FIG. 1 has a rectangular planar shape, and has three sides (that is, the bottom portion 92 and both side portions 93) of the four sides of the two side surface portions 94 and 95 facing each other. Is closed, and the other side constitutes a mouth portion 91 that can be opened and closed.

The bag arrangement portion 11 shown in FIG. 1 is configured as a so-called conveyor magazine that accommodates a large number of bags (particularly empty bags) 90, and includes a conveyor device 20, a delivery device 21, and a guide 22. The conveyor device 20 includes an endless conveyor belt and two conveyor rollers on which the conveyor belts are hung. When a large number of bags 90 are placed on the transport belt, the plurality of bags 90 located on the upstream side of the transport belt are arranged side by side in the horizontal direction while taking an upright posture. The delivery device 21 sends out at least one bag 90 downstream, and arranges the bag 90 to be taken out at a predetermined take-out position. In this way, the bag 90 at the head position (that is, the bag 90 at the most downstream position) is sequentially arranged at the take-out position in the bag arrangement portion 11. Although not shown partially in FIG. 1, the guide 22 guides each bag 90 housed in the bag arranging portion 11 toward the take-out position.

The relay transfer device 12 transfers the bag 90 from the bag arrangement unit 11 to the processing unit 13 (for example, at least one gripper). That is, the bag 90 positioned at the take-out position of the bag arranging unit 11 is lifted while being held by the relay transfer device 12, and the support device 40 of the processing unit 13 (particularly, the support device positioned at the first station S1 described later). It is arranged at the position corresponding to 40). The relay transfer device 12 is reciprocated between the bag arrangement unit 11 and the processing unit 13 by a drive mechanism (not shown). The specific configuration of the drive mechanism for moving the relay transfer device 12 is not limited, and for example, various robots (for example, a parallel link robot or an articulated robot) may be used to move the relay transfer device 12.

The processing unit 13 of the present embodiment is configured as a unit that performs a series of packaging processing including a processing of putting the contents into the bag 90 and a processing of closing the mouth portion 91 of the bag 90. The processing unit 13 is supported by a rotary table 39, a plurality of support devices 40 (eight support devices 40 in the example shown in FIG. 1) attached to the outer peripheral portion of the rotary table 39 at equal intervals, and a support device 40. Includes various devices such as an opening device 44 that opens the mouth 91 of the bag 90. Each support device 40 has at least one gripper that sandwiches and supports the bag 90 passed from each bag transfer member 30 of the relay transfer device 12. Each support device 40 shown in FIG. 1 includes a first gripper 41 and a second gripper 42, and the first gripper 41 and the second gripper 42 grip each of both side portions 93 of the bag 90.

The spacing between the bag grips (ie, the parts that grip both sides 93 of the bag 90) of the first gripper 41 and the second gripper 42 forming the pair is variable and the widthwise size of the bag 90 (ie, both sides). It can be changed according to the size of 93). The width direction size of the bag 90 (particularly the width direction size of the portion gripped by each of the first gripper 41 and the second gripper 42) between the closed state and the open state of the mouth portion 91 of the bag 90. Will change. Therefore, the distance between the bag grip portions of the first gripper 41 and the second gripper 42 forming the pair can be changed between the closed state and the open state of the mouth portion 91 of the bag 90.

The rotary table 39 rotates intermittently around the central axis. Each support device 40 (that is, each pair of the first gripper 41 and the second gripper 42) circulates a plurality of stations S1 to S8 according to the rotation of the rotary table 39, and intermittently stops at the respective stations S1 to S8. do. The number of stations and the number of support devices 40 match each other.

At the first station S1, the support device 40 (the first gripper 41 and the second gripper 42) receives and holds the bag 90 from the bag transfer member 30. In the second station S2, the printing device 43 prints information (for example, the date of manufacture and the product identification display) on the bag 90 (particularly one side surface portion 94 in the example shown in FIG. 1) held by the support device 40. do.

At the third station S3, the opening device 44 opens the mouth portion 91 of the bag 90 held by the support device 40. The opening device 44 shown in FIG. 1 has a first opening holding portion 45 that holds one side surface portion 94 of the bag 90, and a second opening holding portion 46 that holds the other side surface portion 95 of the bag 90. The mouth portion 91 is opened and closed by the first opening holding portion 45 and the second opening holding portion 46 holding both side surface portions 94 and 95 of the bag 90 and moving them closer to or further from each other. Therefore, the first opening holding portion 45 and the second opening holding portion 46 are kept away from each other while holding both side surface portions 94 and 95 of the bag 90 positioned at the third station S3 in order to open the mouth portion 91. .. At this time, the first gripper 41 and the second gripper 42 positioned at the third station S3 are brought close to each other to prevent the side surface portions 94 and 95 of the bag 90 from being excessively tense, and the first opening holding portion 45. And does not hinder the opening operation of the second opening holding portion 46.

At the fourth station S4, the content loading device 47 loads the contents into the inside of the bag 90 through the opened mouth portion 91. The contents charged into the bag 90 by the content charging device 47 are not limited, and may be, for example, liquid and / or solid, foodstuffs, daily necessities, or other uses.

Although the fifth station S5 shown in FIG. 1 is an empty station, arbitrary processing may be performed on the bag 90 located at the fifth station S5. At the sixth station S6, the sealing device 48 seals the bag 90 by welding the side surface portions 94 and 95 to each other with the end portion (upper end portion in the example shown in FIG. 1) on the mouth portion 91 side of the bag 90. Part 96 is formed. In the example shown in FIG. 1, the sealing device 48 forms the sealing portion 96 on the bag 90 by heat welding, but the sealing portion 96 may be formed on the bag 90 by another method (for example, ultrasonic welding). In the seventh station S7, the first cooling device 49 cools the bag 90 by sandwiching the seal portion 96, and the fixing of the side surface portions 94 and 95 in the seal portion 96 is promoted. In the eighth station S8, the second cooling device 50 further cools by sandwiching the seal portion 96 of the bag 90, and then the support device 40 (the first gripper 41 and the second gripper 42) and the second cooling device 50 put the bag 90. Release the support of. As a result, the bag 90 containing the contents is dropped and guided by the discharge chute 51 to be sent to the subsequent stage.

In the bag transport processing system 10 having the above-mentioned device configuration, various devices may be driven under the control of a control device (not shown), or may be driven without being positively controlled from the outside. For example, a conveyor device 20, a delivery device 21, a relay transfer device 12 (bag transfer member 30), a support device 40 (first gripper 41 and a second gripper 42), a rotary table 39, a printing device 43, and an opening device 44 (first). The behavior of at least one of the opening holding portion 45 and the second opening holding portion 46), the content charging device 47, the sealing device 48, the first cooling device 49, and the second cooling device 50 is a sensor (not shown). ) May be detected. The control device may control the drive of various devices based on the detection result of such a sensor. Further, various devices may be driven with a predetermined drive timing and drive rhythm.

Next, each of the relay transfer device 12, the support device 40, and the opening device 44 of the present embodiment will be described in detail.

[Relay transfer device]
The relay transfer device 12 includes a bag transfer member 30. The bag transfer member 30 holds the bag 90 arranged at the take-out position by using Van der Waals force, and holds the bag 90 from the take-out position in the bag arrangement portion 11 to the processing unit 13 (particularly, the first station S1). Transfer to the support device 40) located in.

The bag transfer member 30 can have any material and configuration capable of exerting a van der Waals force capable of lifting the bag 90 on the bag 90. That is, the bag transfer member 30 exerts a van der Waals force (adsorption force) larger than the weight of the bag 90 on the bag 90. With the progress of development of functional materials in recent years, materials capable of bringing a relatively large van der Waals force have also been developed and proposed, and the bag transfer member 30 may be configured using such materials. It is preferable that the specific material and configuration of the bag transfer member 30 are appropriately selected according to the compatibility with the specific material and configuration of the bag 90 (particularly, the side surface portion 94 which is the holding portion). In addition, environmental conditions such as temperature (for example, the take-out position in the bag arrangement portion 11, the movement path of the bag transfer member 30, and the ambient temperature of the first station S1) provide a van der Waals force sufficiently large for lifting the bag 90. It is preferable that the conditions are adjusted so that they can be exhibited.

The relay transfer device 12 shown in FIG. 1 includes two bag transfer members 30, and by bringing each bag transfer member 30 into contact with one side surface portion 94 of the bag 90, each bag transfer member 30 is one of the bags 90. Adsorbs to the side surface portion 94. The suction surface of each bag transfer member 30 may be flat or may be provided with irregularities. Further, the bag transfer member 30 itself may be rich in elasticity. The surface characteristics of one side surface portion 94 of the bag 90 are not limited, but one of them is from the viewpoint that the van der Waals force (adsorption force) exerted by the bag transfer member 30 strongly acts on one side surface portion 94. The side surface portion 94 may have an outer surface having a large flatness. Then, each bag transfer member 30 transfers the bag 90 from the take-out position in the bag arrangement portion 11 to the support device 40 of the processing unit 13 so that the mouth portion 91 of the bag 90 is at the head in the transfer direction. As described above, each bag transfer member 30 of this example transfers the bag 90 from the bag arrangement portion 11 to the processing unit 13 while applying a van der Waals force only to one side surface portion 94 of the bag 90.

Each bag transfer member 30 shown in FIG. 1 reciprocates in an arcuate path. That is, each bag transfer member 30 is in contact with one side surface portion 94 of the bag 90 positioned at the take-out position in the bag arrangement portion 11 and a position where the bag 90 is passed to the support device 40 positioned in the first station S1. It reciprocates along an arc-shaped path with and at both ends. Each bag transfer member 30 can move quickly along a simple and smoothly changing arcuate path. Further, the bag 90 is passed to the "position where each bag transfer member 30 contacts the one side surface portion 94 of the bag 90 positioned at the take-out position in the bag arrangement portion 11" and "the support device 40 positioned at the first station S1". It can be placed accurately at each of the "positions". Therefore, the bag 90 can be accurately transported from the bag arranging unit 11 to the processing unit 13.

2 and 3 are side views showing another example of the bag arrangement portion 11 and the relay transfer device 12. In FIGS. 2 and 3, the guide 22 located on the front side of the paper is not shown, and the state of the bag 90 stored in the space surrounded by the guide 22 is schematically shown.

In the bag arranging section 11 shown in FIGS. 2 and 3, an arranging table 24 is provided instead of the conveyor device 20 shown in FIG. 1, and a plurality of bags 90 in a substantially laid state are placed on the arranging table 24. Each bag 90 is placed on the arrangement table 24 in a state of being partially overlapped with the vertically adjacent bags 90. Then, the bag 90 to be taken out (that is, the bag 90 located at the most downstream on the arrangement table 24) is sent out to the take-out position by the delivery device 21 (not shown in FIG. 2; see FIG. 1). The head portion of the bag 90 (the end portion on the mouth portion 91 side in this example) arranged at the take-out position is restricted and positioned by the stopper 23.

The relay transfer device 12 shown in FIGS. 2 and 3 includes two bag transfer members 30 similar to the relay transfer device 12 shown in FIG. Each bag transfer member 30 is movably supported by a transfer member support portion 31, and the bag transfer member 30 and the transfer member support portion 31 are integrally moved by a drive mechanism (not shown).

In the examples shown in FIGS. 2 and 3, since the stopper 23 is provided, it is difficult for each bag transfer member 30 to reciprocate along a simple arc-shaped path. Therefore, after each bag transfer member 30 comes into contact with one side surface portion 94 of the bag 90 (see FIG. 2), each bag transfer member 30 moves upward so as to partially lift only the leading portion of the bag 90 (see FIG. 3). After that, each bag transfer member 30 moves to a position where the bag 90 is passed to the support device 40 located at the first station S1. In this way, each bag transfer member 30 is lifted to a position where it does not collide with the stopper 23 by partially turning over the front end portion (in this example, the mouth portion 91 side end portion) of the bag 90 in the transfer direction, and then the bag. 90 is moved from the bag arrangement portion 11 to the processing unit 13.

According to the relay transfer device 12 shown in FIGS. 1 to 3 described above, the bag 90 can be transferred while being held by the van der Waals force generated by the bag transfer member 30, so that the bag 90 can be transferred from the bag transfer member 30 to the bag 90. On the other hand, almost no damage is added. Further, when the bag 90 is handed over from the bag transfer member 30 to the support device 40, the bag 90 can be easily peeled off from the bag transfer member 30. Therefore, the delivery from the bag transfer member 30 to the support device 40 can be performed quickly without complicated operations.

[Support device]
FIG. 4 is a front view showing an example of the support device 40 (first gripper 41 and second gripper 42). 5 and 6 are upper views showing an example of the support device 40 (particularly the first gripper 41). In FIGS. 5 and 6, the relay transfer device 12 (bag transfer member 30) is not shown.

The gripping surface of the first gripper 41 and the second gripper 42 of the present embodiment can hold the bag 90 by utilizing the van der Waals force.

The first gripper 41 shown in FIGS. 4 to 6 includes a gripper fixing portion 41a and a gripper swinging portion 41b oscillatingly attached to the gripper fixing portion 41a via a swinging shaft portion 41d. A gripping surface portion 41c is attached to each of the gripper fixing portion 41a and the gripper swinging portion 41b. Similarly, the second gripper 42 includes a gripper fixing portion 42a and a gripper swinging portion 42b oscillatingly attached to the gripper fixing portion 42a via a swinging shaft portion 42d. A gripping surface portion 42c is attached to each of the gripper fixing portion 42a and the gripper swinging portion 42b.

The gripping surface portions 41c and 42c exert a large van der Waals force on the bag 90 (particularly both side surface portions 94 and 95). Similar to the bag transfer member 30 described above, the specific materials and configurations of the gripping surface portions 41c and 42c are not limited, but it is preferably appropriately selected according to the characteristics of the bag 90 (particularly both side surface portions 94 and 95). .. For example, the suction surfaces of the gripping surface portions 41c and 42c may be flat or may be provided with irregularities. Further, the gripping surface portions 41c and 42c themselves may be rich in elasticity. Further, it is preferable that the environmental conditions such as temperature are adjusted so that the gripping surface portions 41c and 42c can exert a van der Waals force sufficiently large with respect to the bag 90, similarly to the bag transfer member 30 described above.

When each bag transfer member 30 transfers the bag 90 from the take-out position of the bag arrangement portion 11 to the first station S1, each of the gripper swing portion 41b and the gripper swing portion 42b is arranged in the open position (FIG. 5). reference). The other side surface portion 95 of the bag 90 positioned at the first station S1 with one side surface portion 94 supported by each bag transfer member 30 is attached to each of the gripper fixing portion 41a and the gripper fixing portion 42a. It is held by the gripping surface portions 41c and 42c. After that, each of the gripper swinging portion 41b and the gripper swinging portion 42b swings and moves from the open position to the closed position, and the gripping surface portion 41c provided on each of the gripper fixing portion 41a and the gripper swinging portion 41b is a bag. Facing via 90 (see FIG. 6). Similarly, the gripping surface portions 41c provided on each of the gripper fixing portion 42a and the gripper swinging portion 42b face each other via the bag 90. As a result, one side portion 93 of the bag 90 is sandwiched and supported by the gripping surface portions 41c provided on each of the gripper fixing portion 41a and the gripper swinging portion 41b. Further, the other side portion 93 of the bag 90 is sandwiched and supported by the gripping surface portions 41c provided on each of the gripper fixing portion 42a and the gripper swinging portion 42b.

As described above, the first gripper 41 and the second gripper 42 can exert not only the gripping force mainly caused by the frictional force but also the holding force caused by the van der Waals force on the bag 90. Therefore, the first gripper 41 and the second gripper 42 firmly hold the bag 90 and can effectively prevent the bag 90 from being misaligned or falling off. Further, as the van der Waals force acting on the bag 90 from the first gripper 41 and the second gripper 42 increases, the gripping force acting on the bag 90 from the first gripper 41 and the second gripper 42 can be reduced. Therefore, according to the first gripper 41 and the second gripper 42 of the present embodiment, it is possible to prevent an excessive gripping force from acting on the bag 90 from the first gripper 41 and the second gripper 42, and to prevent damage that can be applied to the bag 90. Can be alleviated.

[Aperture device]
FIG. 7 is a side view showing an example of the opening device 44. FIG. 8 is an upper view showing an operation example of the opening device 44.

In the opening device 44 of the present embodiment, one side surface portion 94 and the other side surface portion 95 of the bag 90 are held while holding at least one of the side surface portions 94 and 95 of the bag 90 by utilizing Van der Waals force. It operates so as to be separated from each other and opens the mouth portion 91.

The opening device 44 shown in FIGS. 7 and 8 uses van der Waals force to hold both side surface portions 94 and 95 of the bag 90. That is, the opening device 44 connects a frame 63 fixed to a stand or the like (not shown), an opening drive source 60 such as a servomotor fixed to the frame 63, an output shaft 60a of the opening drive source 60, and a screw shaft 62. It includes a connecting member 61. The screw shaft 62 has a first screw portion 62a and a second screw portion 62b having threads that are opposite to each other. A first slide member 65 to which the first opening holding portion 45 is attached is screw-engaged with the first screw portion 62a. A second slide member 66 to which the second opening holding portion 46 is attached is screw-engaged with the second screw portion 62b. The frame 63 supports a guide shaft 64 extending parallel to the screw shaft 62. The guide shaft 64 slidably supports the first slide member 65 and the second slide member 66.

The first slide member 65 moves along the screw shaft 62 and the guide shaft 64 together with the first opening holding portion 45. The second slide member 66 moves along the screw shaft 62 and the guide shaft 64 together with the second opening holding portion 46. The opening holding surface portion 45a of the first opening holding portion 45 and the opening holding surface portion 46a of the second opening holding portion 46 are located on a straight line extending in the extending direction of each of the screw shaft 62 and the guide shaft 64, and are located on each other. Move while maintaining the facing state.

The opening holding surface portion 45a of the first opening holding portion 45 and the opening holding surface portion 46a of the second opening holding portion 46 exert a large van der Waals force on the bag 90 (particularly both side surface portions 94 and 95). Similar to the bag transfer member 30 and the gripping surface portions 41c and 42c described above, the specific materials and configurations of the opening holding surface portions 45a and 46a are not limited, but depending on the characteristics of the bag 90 (particularly both side surface portions 94 and 95). It is preferable to select appropriately. For example, the suction surfaces of the opening holding surface portions 45a and 46a may be flat or may be provided with irregularities. Further, the opening holding surface portions 45a and 46a themselves may be rich in elasticity. Further, the environmental conditions such as temperature are also such that the opening holding surface portions 45a and 46a can exert a van der Waals force sufficiently large with respect to the bag 90, as in the case of the bag transfer member 30 and the gripping surface portions 41c and 42c described above. It is preferable to be prepared.

In the opening device 44 having the above configuration, the opening drive source 60 rotates the output shaft 60a, so that the connecting member 61 and the screw shaft 62 rotate around the axis common to the output shaft 60a. As a result, the first slide member 65 and the second slide member 66 move symmetrically with each other along the screw shaft 62 and the guide shaft 64, and move toward or away from each other depending on the rotation direction of the screw shaft 62. do.

Prior to or at the same time as moving the bag 90 from the second station S2 to the third station S3 together with the corresponding support device 40, the opening drive source 60 rotates the screw shaft 62 to rotate the first opening holding portion 45. And the second opening holding portion 46 is arranged at the standby position P1. A sufficiently large space is secured between the first opening holding portion 45 and the second opening holding portion 46 arranged in the standby position P1, and the bag 90 to be opened smoothly moves to the space.

Then, in order to bring the first opening holding portion 45 and the second opening holding portion 46 into contact with the bag 90 arranged in the third station S3, the opening drive source 60 rotates the screw shaft 62 to bring the first opening holding portion 45. And the second opening holding portion 46 is moved from the standby position P1 and arranged at the holding position P2. As a result, the opening holding surface portion 45a of the first opening holding portion 45 and the opening holding surface portion 46a of the second opening holding portion 46 can be brought into contact with each of the side surface portions 94 and 95 of the bag 90 that are in close contact with each other. can. As a result, due to the van der Waals force exerted by the opening holding surface portions 45a and 46a, one side surface portion 94 of the bag 90 is held by the opening holding surface portion 45a of the first opening holding portion 45, and the other side surface portion 95 is held by the opening holding surface portion 45a. 2 It is held by the opening holding surface portion 46a of the opening holding portion 46.

Then, in order to open the mouth portion 91 of the bag 90, the opening drive source 60 rotates the screw shaft 62 to move the first opening holding portion 45 and the second opening holding portion 46 from the holding position P2 to open the opening position P3 (the opening position P3 ( (See FIG. 8). The opening position P3 is an intermediate position between the standby position P1 and the holding position P2. The opening holding surface portion 45a of the first opening holding portion 45 and the opening holding surface portion 46a of the second opening holding portion 46 maintain the state of holding both side surface portions 94 and 95 of the bag 90 at the opening position P3. As a result, the mouth 91 of the bag 90 is opened.

9 and 10 are upper views showing another example of the first opening holding portion 45 (opening device 44). Although only the first opening holding portion 45 is shown in FIGS. 9 and 10, the second opening holding portion 46 can be configured in the same manner as the first opening holding portion 45 shown in FIGS. 9 and 10.

The first opening holding portion 45 and the second opening holding portion 46 according to this modification are before or relative to each other so that one side surface portion 94 and the other side surface portion 95 of the bag 90 move relative to each other. At the same time as the target movement, one side surface portion 94 moves relatively in the shifting direction including the component in the extending direction. More specifically, the first opening holding portion 45 moves in the shifting direction before moving from the holding position P2 to the opening position P3 or at the same time as moving from the holding position P2 to the opening position P3. The "shifting direction" referred to here is not limited, and may be a horizontal direction, a height direction along a vertical direction on which gravity acts, or an inclination with respect to the horizontal direction and the vertical direction. It may be in the direction.

The first opening holding portion 45 shown in FIGS. 9 and 10 is connected to a shifting drive source 70 such as an air cylinder via a parallel link mechanism, and is connected to a shifting drive source 70 such as an air cylinder in the horizontal direction along one side surface portion 94 of the bag 90 (FIG. 9). 9 and the vertical direction of FIG. 10) are provided so as to be movable. The shift drive source 70 is fixedly supported by the first slide member 65 via the support member 74. The amount of protrusion of the drive shaft 70a of the shift drive source 70 is variable, and the tip end side portion of the drive shaft 70a is connected to the first slide member 65 and the moving member 73 via the first link 71. The first link 71 is rotatably connected to each of the drive shaft 70a, the first slide member 65, and the moving member 73. The first slide member 65 and the moving member 73 are connected to each other via a second link 72. The second link 72 is rotatably connected to each of the first slide member 65 and the moving member 73. The first opening holding portion 45 is fixedly attached to the moving member 73.

According to the opening device 44 having the above-described configuration, the first opening holding portion 45 does not change the direction of the opening holding surface portion 45a at all or almost according to the amount of protrusion of the drive shaft 70a from the main body of the shifting drive source 70. The position of can be shifted in the shifting direction. The opening holding surface portion 45a shown in FIGS. 9 and 10 is in a direction parallel to the direction in which one side surface portion 94 of the bag 90 extends (vertical direction in FIGS. 9 and 10) according to the amount of protrusion of the drive shaft 70a. ), And also slightly in the direction perpendicular to one side surface portion 94 (the left-right direction of FIGS. 9 and 10).

For example, when the configuration of the opening device 44 shown in FIGS. 9 and 10 is applied to the opening device 44 shown in FIG. 7, the first opening holding portion 45 and the second opening holding portion are mainly provided by the opening drive source 60 (see FIG. 7). The 46 can be moved in the direction perpendicular to the side surface portions 94 and 95 of the bag 90. On the other hand, the shift drive source 70 (FIGS. 9 and 10) can move the first opening holding portion 45 and the second opening holding portion 46 in the direction in which the side surface portions 94 and 95 of the bag 90 extend. The opening drive source 60 was driven to arrange the first opening holding portion 45 and the second opening holding portion 46 at the holding position P2 (see FIGS. 7 and 8), and the opening holding surface portions 45a and 46a were brought into contact with the bag 90. After that, the shift drive source 70 is driven to move the first opening holding portion 45 and the second opening holding portion 46 in the shifting direction. This creates a gap between the side surface portions 94 and 95 prior to opening the mouth portion 91 of the bag 90 or at the same time as opening the mouth portion 91, making it easier to separate the side surface portions 94 and 95 from each other. be able to.

According to the opening device 44 shown in FIGS. 7 to 10 described above, the bag 90 is held by the van der Waals force provided by the first opening holding portion 45 and the second opening holding portion 46 (particularly, the opening holding surface portions 45a and 46a). The mouth 91 can be opened while doing so. Therefore, almost no damage is applied to the bag 90 from the first opening holding portion 45 and the second opening holding portion 46.

In the process of moving the first opening holding portion 45 and the second opening holding portion 46 away from each other, when the size of the opening of the mouth portion 91 reaches a certain level, the side surface portions 94 and 95 of the bag 90 naturally become. It is separated from both opening holding surface portions 45a and 46a. Therefore, after the opening of the mouth 91 of the bag 90, the opening drive source 60 is driven to move the first opening holding portion 45 and the second opening holding portion 46 away from each other (that is, from the opening position P3 to the standby position P1). Move towards). As a result, the distance between the opening holding surface portions 45a and 46a is increased, and the both side surface portions 94 and 95 of the bag 90 can be released from the holding of the first opening holding portion 45 and the second opening holding portion 46.

As described above, according to the present embodiment, the bag 90 is supplied from the bag arranging unit 11 to the processing unit 13, the bag 90 is held by the support devices 40 (the first gripper 41 and the second gripper 42), and the bag 90 is held. Van der Waals forces are utilized for each of the bag 90 opening treatments. Therefore, the bag can be held with a simple device configuration while suppressing damage that can be applied to the bag 90.

Since the van der Waals force is exerted based on the material properties of the constituent materials, the apparatus and method of the present embodiment do not require a power source for producing the van der Waals force. Therefore, the device configuration is simplified, the space saving of the device is promoted, and the running cost is reduced.

Further, it is excessive to separate the bag 90 from the holding surface by moving the bag 90 in the direction perpendicular to the holding surface while preventing the bag 90 from shifting in the direction parallel to the holding surface that exerts the van der Waals force. It is also possible to make it forceless. In this case, the bag holding points (the bag transfer member 30, the gripping surface portions 41c and 42c, and the opening holding surface portions 45a and 46a described above) can accurately hold and move the bag 90 by using Van der Waals force. There is, and it is easy to release the bag 90 from the bag holding position.

Further, by combining the gripping force of the grippers (first gripper 41 and the second gripper 42) with the van der Waals force, the gripping force of the gripper can be weakened, and the damage that can be applied from the gripper to the bag 90 can be reduced. can.

The present disclosure is not limited to the embodiments and modifications described above. For example, various modifications may be added to each element of the above-described embodiment and modification. Further, the configurations of the above-described embodiments and modifications may be combined in whole or in part.

10 Bag transfer processing system 11 Bag arrangement unit 12 Relay transfer device 13 Processing unit 20 Conveyor device 21 Sending device 22 Guide 23 Stopper 24 Arrangement stand 30 Bag transfer member 31 Transfer member support unit 39 Rotating table 40 Support device 41 First gripper 41a Gripper Fixed part 41b Gripper swinging part 41c Gripping surface part 41d Swinging shaft part 42 Second gripper 42a Gripper fixing part 42b Gripper swinging part 42c Gripping surface part 42d Swinging shaft part 43 Printing device 44 Opening device 45 First opening holding part 45a Opening Holding surface portion 46 Second opening holding portion 46a Opening holding surface portion 47 Contents loading device 48 Sealing device 49 First cooling device 50 Second cooling device 51 Discharge chute 60 Opening drive source 60a Output shaft 61 Connecting member 62 Screw shaft 62a First screw Part 62b 2nd screw part 63 Frame 64 Guide shaft 65 1st slide member 66 2nd slide member 70 Shift drive source 70a Drive shaft 71 1st link 72 2nd link 73 Moving member 74 Support member 90 Bag 91 Mouth 92 Bottom 93 Side 94 One side 95 Seal 96 Seal P1 Standby position P2 Holding position P3 Opening position S1 1st station S2 2nd station S3 3rd station S4 4th station S5 5th station S6 6th station S7 7 stations S8 8th station

Claims (7)

A bag arrangement part where one or more bags are arranged, and
A processing unit including a support device for supporting the bag to be passed and an opening device for opening the mouth of the bag supported by the support device.
A bag transfer processing system including a relay transfer device including a bag transfer member that transfers the bag from the bag arrangement portion to the support device while holding the bag using van der Waals force. The bag transfer member is
The bag is transferred from the bag arrangement portion to the support device while applying a van der Waals force only to one side surface portion of the bag.
The bag transport processing system according to claim 1, wherein the bag is transferred from the bag arrangement portion to the support device so that the mouth portion of the bag is at the head in the transfer direction. A bag arrangement part where one or more bags are arranged, and
A processing unit comprising at least one gripper having a gripping surface capable of holding the bag by using van der Waals force, which is at least one gripper that sandwiches and supports the bag to be passed.
A bag transport processing system comprising a relay transport device for transporting the bag from the bag arrangement unit to the at least one gripper. The bag transport processing system according to claim 3, wherein the at least one gripper includes a first gripper and a second gripper that support both sides of the bag, respectively. Equipped with a processing unit
The processing unit is
A support device that supports the bag to be handed over,
An opening device that opens the mouth of the bag supported by the support device, and one of the bags is held while holding at least one of both side surfaces of the bag by using van der Waals force. A bag transport processing system comprising an opening device that opens a mouth portion by operating the side surface portion and the other side surface portion so as to be separated from each other. The opening device has a first opening holding portion that holds the one side surface portion and a second opening holding portion that holds the other side surface portion of the bag.
The first opening holding portion and the second opening holding portion are before the one side surface portion and the other side surface portion move relatively so as to be separated from each other, or the one side surface portion and the other side surface portion. The bag transport processing system according to claim 5, wherein the portions move relative to each other so as to be separated from each other, and at the same time, one of the side portions moves relative to each other in a shifting direction including a component in the extending direction. The bag transport processing system according to any one of claims 1 to 4, wherein the bag arranging unit includes a delivery device that sends out at least one bag downstream.

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