JP5078711B2 - Sealed object gripping device - Google Patents

Description

  The present invention is used when sealing an opening of a sealed object containing contents by a heat seal device, and a sealed object gripping device for gripping the opening, and the heat sealing device and the sealed object. The present invention relates to a heat seal system including a sealing body gripping device.

  In order to seal the opening part of the packaging bag (an example of a to-be-sealed body) of the resin film which accommodated the contents, since it has advantages, such as simplicity and certainty, a heat seal device is often used (for example, (See the impulse heat sealer disclosed in Patent Documents 1 and 2 below).

  Examples of the contents stored in the packaging bag include various foods, medical instruments, foods, machine parts, medicines, and the like.

JP 2007-176598 A JP 2007-022602 A

  In the above, when sealing the opening, the sealing may be performed after the air inside the packaging bag is discharged and evacuated. Alternatively, sealing may be performed after introducing nitrogen gas or the like into the packaging bag. In that case, the operator performs an operation of opening the opening, the nozzle is inserted into the inside of the packaging bag, the air is discharged and introduced, and then the opening is sealed by a heat seal device.

  However, performing this operation for each of the packaging bags is a complicated operation and improvement has been desired. Moreover, when performing the operation | movement which opens an opening part with a machine, it is necessary to perform the operation | movement which opens reliably.

  The present invention has been made in view of the above circumstances, and the problem is that when opening the opening of the sealed object in which the contents are stored, the manual operation of the operator is eliminated as much as possible and the opening operation is performed reliably. It is an object of the present invention to provide a sealed body gripping apparatus capable of performing the above and a heat seal system including the sealed body gripping apparatus.

In order to solve the above-described problem, a sealed object gripping device according to the present invention includes:
A sealed body gripping device for gripping the opening, which is used when sealing an opening of a sealed body containing contents by a heat seal device,
A first gripping member disposed on each of the left and right sides in the vicinity of the opening and positioned on the back surface side of the sealed body; and a second gripping member disposed on the surface side of the sealed body facing the first gripping member A state switching mechanism for switching the first and second gripping members between a gripping state and an open state;
Gripping member control means for controlling the driving of the first and second gripping members,
The gripping member control means holds the first and second gripping members in the first and second gripping members so that the openings are tightly closed after gripping the left and right sides of the sealed object by the first and second gripping members. Then, at least one of the first and second gripping members is driven in the second direction to open the center in the width direction of the opening, and the gas inside the sealed body is discharged. A nozzle for introducing gas into the sealable body can be inserted into the sealed body through the opening, and after the nozzle is inserted, the first and second gripping members are driven again in the first direction to close the opening. The first and second gripping members are controlled so as to be in a closed state.

  The operation and effect of the sealed object gripping device having such a configuration will be described. First, grip members are arranged on both the left and right sides in the vicinity of the opening of the sealed body. As for the gripping member, a first gripping member and a second gripping member are arranged on the back side and the front side of the sealed body, respectively. That is, the first and second gripping members are disposed on the left side near the opening, and the first and second gripping members are disposed on the right side near the opening. The sealed body can be gripped by the first gripping member and the second gripping member.

  The driving of the first and second gripping members is controlled by gripping member control means. When opening the opening, the first and second gripping members are driven in the first direction so that the opening is closed tightly instead of immediately opening the opening. Specifically, the opening can be tightly closed by operating the left and right sides in the vicinity of the opening in a direction away from each other (as if pulling). If the opening is held in a halfway open state, there is a possibility that the opening of the opening may not be performed reliably, so the above operation is performed.

  Subsequently, at least one of the first and second gripping members is driven in a second direction different from the first direction. Specifically, the opening can be reliably opened by operating in a direction in which the left and right sides approach each other. As a result, the nozzle can be inserted from the opening. When the nozzle is inserted into the sealed body, the opening can be tightly closed again by driving the first and second gripping members in the first direction again.

  According to the above configuration, no manual work is required to open the opening, and the complexity of the work can be improved. Further, the opening operation can be surely performed by controlling the operation of the first and second gripping members as described above.

  In the present invention, each of the first gripping member and the second gripping member is a gripping roller having at least a surface having elasticity, and is set so that the rotation directions are opposite to each other in the first direction and the second direction. It is preferable.

  By gripping the object to be sealed by the gripping roller having such elasticity, a large frictional force can be secured, and the gripping portion can be gripped so as not to slip carelessly, so that the opening operation can be performed reliably. Further, since only the rotation direction of the gripping roller is changed, the switching control between the first direction and the second direction can be easily and reliably performed.

  In the present invention, when driving in the first direction, both the first and second gripping members are rotated, and one of the first and second gripping members is rotated by a driving source via a torque limiter. It is preferable that it is comprised.

  When driving the first direction to close the opening of the object to be sealed tightly, if a large torque is applied, the reliability of the above operation is improved, but if a torque larger than necessary is applied, the object to be sealed is May be scratched or broken. Therefore, by providing a torque limiter, it is possible to prevent a force exceeding a predetermined value from acting on the sealed body, and to securely close the opening of the sealed body without causing a problem.

  In the present invention, when driving in the second direction, it is preferable to drive only one of the first and second gripping members.

  According to such a configuration, one of the front surface side and the back surface side of the sealed body is prevented from moving, and only the other side is driven in the second direction. If both the front surface side and the back surface side are driven, the front surface side and the back surface side of the sealed object may be deformed into the same shape, and the opening may not be performed well. Therefore, by driving only one of them, it can be operated so as to be surely opened.

  One of the first and second gripping members according to the present invention is preferably driven by a drive source via a one-way clutch.

  When driving in the second direction, if the one-way clutch is disengaged, power transmission from the drive source is not performed to one of the first and second gripping members. For the other of the first and second gripping members, there is no one-way clutch, and the power from the drive source is transmitted as it is. Thereby, the structure which drives only one holding member is realizable. Further, when driving in the first direction, since the one-way clutch is locked, both the first and second gripping members are driven.

In the present invention, a first placement member on which the vicinity of the opening of the sealed body is placed;
A second mounting member on which a portion other than the opening is mounted;
A connecting means for connecting the first mounting member and the second mounting member via a connecting shaft;
A mounting member rotating mechanism for forcibly rotating the second mounting member around the connecting shaft so that the bottom side of the object to be sealed is lifted with respect to the opening before heat sealing; preferable.

  As a mounting mechanism for mounting the object to be sealed, the first mounting member and the second mounting member are connected by a connecting means. The second mounting member is configured to be rotatable around the connecting shaft, and a mounting member rotating mechanism for forcibly rotating the second mounting member is provided so that the bottom side of the sealed body is lifted. ing. When the contents are accommodated in the sealed body, the contents may be shifted toward the bottom when the opening is held with the opening of the sealed body facing up. In such a state, it is considered undesirable to seal the inside of the sealed body by vacuum. Therefore, by raising the bottom of the object to be sealed in the stage before performing the sealing operation, the contents can be dispersed as evenly as possible in the object to be sealed, and the sealing quality can be improved.

  In the present invention, there is provided a posture switching mechanism for switching the postures of the first and second mounting members, the parallel posture in which the sealed body is stably placed on the respective placement surfaces, and the sealed body is It is preferable to be configured to be switchable to an inclined posture that allows sliding down from the mounting surface.

  By providing such a posture switching mechanism, the sealing operation can be performed in a stable state by setting the mounting surface in a parallel posture when performing the sealing operation of the object to be sealed. In addition, when a sealed body that has been sealed is stacked on a separately provided stacking unit, the sealed target body can be stacked on the stacking unit by placing the mounting surface in an inclined posture.

In order to solve the above problems, a heat seal system according to the present invention includes the sealed object gripping device according to the present invention, and a heat seal device for sealing the opening,
The heat seal device controls a pressing portion that presses the vicinity of the opening, a pressure bonding operation portion including a seal pressure bonding portion having a heater for sealing the opening, and the operation of the pressure bonding operation portion and the nozzle. A crimping control means for
The pressure-bonding control means is an operation that, after the nozzle is inserted into the sealed body, presses the vicinity of the opening by the pressing portion and causes the nozzle to escape from the sealed body after the gas is discharged or introduced by the nozzle. Further, the control is performed so that the opening is crimped by the seal crimping portion and the opening is sealed by the heater.

  The operation and effect of such a heat seal system will be described. After the opening of the sealed body is opened by the above-described sealed body gripping apparatus and the nozzle is inserted therein, the opening is closed again in a tight state. In this state, the crimping operation part of the heat seal device is operated, and first, the vicinity of the opening is pressed by the pressing part. In this state, an operation for discharging the gas in the sealed body and an operation for introducing the gas into the sealed body are performed by the nozzle. Since the vicinity of the opening is pressed by the pressing portion, the operation by the nozzle can be surely performed in a state of being blocked from the outside air.

  After the operation of the nozzle is completed, the nozzle is allowed to escape from the sealed body. Further, the opening by the seal crimping part is crimped, and heat sealing is performed by a heater to perform sealing. Thereby, the sealing operation following the operation by the nozzle can be reliably performed, and a desired seal quality can be maintained.

  A preferred embodiment of a heat seal system according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an external configuration of the entire heat seal system. FIG. 2 is a diagram illustrating a configuration of the packaging bag.

  When an appropriate content is accommodated in a packaging bag P (corresponding to a sealed object) as shown in FIG. 2, the opening A is sealed and sealed. The inner side adjacent to the opening A is a portion corresponding to the gripping region S, and when the opening A is sealed, this location is pressed and held so that the packaging bag P does not move carelessly. Examples of the contents stored in the packaging bag P include foods, mechanical parts, medical instruments such as syringes, various daily necessities, and the like, but are not limited to specific ones.

  As shown in FIG. 1, the heat sealing system includes a heat sealing device H for sealing the opening A of the packaging bag P, a sealed body gripping device M for gripping the gripping region S of the packaging bag P, and a housing unit. B. A heat sealing device H and a sealed object gripping device M are accommodated in the housing part B, the heat sealing device H is fixed, and the sealed body gripping device M is inside the housing part B by a drive mechanism (not shown). Can be moved.

  In FIG. 1, the heat sealing apparatus H includes a base portion 1 located on the lower side of the apparatus, and main mechanisms are accommodated in the base portion 1. An upper cover member 2 is provided on the upper portion of the base portion 1. On the front side of the base portion 1, there is provided a bag sandwiching portion 3 for placing and sandwiching the packaging bag P that should seal the opening A. A crimping lever part 4 (corresponding to a crimping operation part) is provided on the upper front side of the base part 1, and when the sealing is performed, the crimping lever part 4 is pushed down.

  A first receiving part 30 and a second receiving part 31 are arranged in the bag holding part 3. Correspondingly, a first pressing part 40 and a second pressing part 41 are arranged in the crimping lever part 4. The 1st press part 40 and the 1st receiving part 30 have a function which presses the holding area | region S of the packaging bag P, The surface is formed with elastic materials, such as rubber | gum. The 2nd press part 41 and the 2nd receiving part 31 have a function which presses and clamps the opening part A (sealed location) of the packaging bag P. As shown in FIG. Moreover, the 1st press part 40 and the 2nd press part 41 can move independently. A pair of drive levers 4 a are provided on both the left and right sides of the pressure-bonding lever portion 4, and are integrally connected to the second pressing portion 41. The drive lever 4a is connected to a drive shaft 4b and is driven by a cylinder (not shown). The crimping lever part 4 is supported so as to be rotatable around a predetermined axis set on the back side of the base part 1.

  The second receiving portion 31 incorporates a linear heater (not shown) in the upper portion thereof, and the surface portion is covered with a fluororesin sheet. Thereby, the fusion piece of the packaging bag P made of resin is difficult to adhere, and even if it adheres, it is easy to peel off. The linear heater has a length sufficient to cover the length of the opening A of the packaging bag P.

  The second pressing portion 41 includes support portions 41 a for supporting the first pressing portion 40 at two locations on the front side of the operation. A first pressing portion support shaft 42 is integrally coupled to the first pressing portion 40, and the first pressing portion support shaft 42 is slidably attached along the support portion 41a. In addition, a coil spring is provided around the first pressing portion support shaft 42, and biases the first pressing portion 40 downward relative to the second pressing portion 41.

  A nozzle 43 that is movable in the front-rear direction is provided on the upper surface side of the base part 1, and the nozzle 43 is disposed between the first pressing part 40 and the first receiving part 30 from the back side of the base part 1. It can be inserted into the packaging bag P by moving to the space. The nozzle 43 can discharge the gas inside the packaging bag P or introduce the gas into the inside.

  The sealed body gripping device M will be described in detail with reference to the drawings. FIG. 3 is a perspective view showing an external configuration of the sealed object gripping apparatus M. FIG. The to-be-sealed body gripping device M is composed of a bag placement unit 5 and a bag gripping unit 6. The bag placing unit 5 is provided with a placing table 50 on which the packaging bag P can be placed. The mounting table 50 has a box shape and is fixed to the casing B. Two side plates 50 a are formed on the mounting table 50, and the distance between the side plates 50 a is slightly larger than the width of the packaging bag P. Further, a contact plate 50b is formed on the mounting table 50, and the packaging bag P is placed when the packaging bag P is placed such that the bottom D side end of the packaging bag P contacts the contact plate 50b. The grip region S is set to the position of the bag grip portion 6.

  The bag placement unit 5 is provided with a second bag support plate 51 (corresponding to a second placement member) for lifting the packaging bag P. The second bag support plate 51 is pivotally supported on the connection shaft 60a of the bag gripping portion 6, and only the second bag support plate 51 can rotate around the connection shaft 60a. In addition, the second bag support plate 51 has an inclined surface 51a, and even when the contents are inflated by putting the contents in the packaging bag P, the gripping region S is formed when the second bag support plate 51 is placed on the bag placing portion 5. It is easy to arrange at the position of the bag gripping portion 6. The second bag support plate 51 is U-shaped as shown. When the second bag support plate 51 is in a horizontal state, the packaging bag P is mounted as a whole together with the W-shaped mounting table 50. It becomes a box for placing.

  The bag holding portion 6 is provided with a first bag support plate (corresponding to a first placement member) 60 so as to be continuous with the second bag support plate 51. Thus, a placement surface on which the packaging bag P is placed is formed. The 2nd bag support plate 51 and the 1st bag support plate 60 are connected by the connection shaft 60a provided in each right and left, and the 1st bag support plate 60 and the 2nd bag support plate 51 are integrally around the connection shaft 60a. Can be rotated. Further, the operation plate 70 is provided so as to be slidable in the horizontal direction. Two actuating shafts 71 project from the actuating plate 70, and the actuating shaft 71 passes through a hole 71 a provided in the bag gripping portion 6 and is in contact with the back side of the inclined surface 51 a. The operating plate 70 is urged in the protruding direction by a spring (not shown). The actuating plate 70 contacts the contact surface 30a of the heat sealing device H when the sealed body gripping device M approaches the heat sealing device H and performs sealing.

  The bag holding part 6 will be described in more detail with reference to FIG. FIG. 4 is a perspective view showing the configuration of the bag gripping portion 6, and a part thereof is omitted for explanation of the internal configuration.

  The bag gripping portion 6 is mainly composed of a gripping main body portion 61 and roller support plates 62 that are provided on both sides of the gripping main body portion 61 and can be switched between an open state and a gripping state by rotating with respect to the gripping main body portion 61. Composed. Two connecting plates 61a are fixed to both sides of the gripping main body 61, and a second connecting roller 64a is provided above the connecting plate 61a so as to be sandwiched between the two connecting plates 61a. . The roller support plate 62 is configured to be rotatable around the rotation axis of the second connecting roller 64a. A cylinder connection shaft 62a is provided at the end of the roller support plate 62. The tip 62c of the first cylinder 62b connected to the cylinder connection shaft 62a moves up and down so that the roller support plate 62 can rotate. ing. The left and right roller support plates 62 are provided with second gripping rollers 64R and 64L, respectively.

  In the grip body 61, first grip rollers 63R and 63L, first contact rollers 63aR and 63aL, distribution rollers 66R and 66L, and transmission rollers 65aR and 65aL are rotatably provided at symmetrical positions. . Further, below one transmission roller 65aR, a driving roller 65 coaxial with the driving shaft of a roller driving motor (corresponding to a driving source) 65b is provided. For example, a stepping motor is used as the roller drive motor 65b. A second cylinder 67 for rotating the first bag support plate 60 and the second bag support plate 51 integrally around the connecting shaft 60a to switch between the parallel posture and the inclined posture is provided at the lower portion of the grip body 61. It is provided via a link structure. The distal end 67 a of the link structure is connected to the back side of the first bag support plate 60, and the posture of the first bag support plate 60 can be switched by moving the distal end 67 a up and down by the action of the second cylinder 67.

  Next, the driving mechanism of each roller of the bag gripping portion 6 will be described with reference to FIGS. FIG. 5 is a cross-sectional view from above of the bag gripping portion 6. The drive roller 65 and the transmission roller 65aR are connected by a belt 65c as shown in FIG. The transmission roller 65aR and the distribution roller 66R are connected by a belt 68. A first intermediate gear 66aR is integrally formed coaxially with the distribution roller 66R. A second intermediate gear 66bR is provided coaxially with the distribution roller 66R. The second intermediate gear 66bR and the distribution roller 66R can rotate independently.

  Adjacent first intermediate gears 66aR and 66aL mesh with each other. Further, the adjacent second intermediate gears 66bR and 66bL also mesh with each other. The second intermediate gear 66bL is provided coaxially with the distribution roller 66L, and can rotate independently as in the relationship between the second intermediate gear 66bR and the distribution roller 66R. However, normally, a torque limiter 66c is provided between the distribution roller 66L and the second intermediate gear 66bL. When the torque limiter 66c is connected to each other and rotates integrally, and a torque exceeding a predetermined value is generated. It is comprised so that both connection may be cut | disconnected. For example, as the torque limiter 66c, a spring having a predetermined urging force can be provided so as to urge it in a direction in which the springs are close to each other between the distribution roller 66L and the second intermediate gear 66bL.

  The second intermediate gears 66bR and 66bL mesh with the third intermediate gears 63bR and 63bL integrally formed coaxially with the first connecting rollers 63aR and 63aL. The first contact rollers 63aR and 63aL and the first gripping rollers 63R and 63L are connected by belts 69 and 69.

  With the above configuration, the rotational motion of the roller drive motor 65b is transmitted to the first and second gripping rollers. The state of transmission is shown in FIG. In FIG. 7, M is a motor, R is a roller, G is a gear, T is a torque limiter, and C is a clutch. That is, as shown in FIG. 7, the rotational movement of the roller drive motor 65b is caused by the transmission roller 65aR, the distribution roller 66R, the first intermediate gear 66aR, the first intermediate gear 66aL, the distribution roller 66L, the second intermediate gear 66bL, and the second. The intermediate gear 66bR, the third intermediate gear 63bR, the one-way clutch 63cR, the first connecting roller 63aR, and the first gripping roller 63R are transmitted in this order. At the same time, the rotational motion of the distribution roller 66L is transmitted in the order of the second intermediate gear 66bL, the third intermediate gear 63bL, the one-way clutch 63cL, the first connecting roller 63aL, and the first gripping roller 63L. Note that one-way clutches 63cR and 63cL are provided inside the first contact rollers 63aR and 63aL and the third intermediate gears 63bR and 63bL, and the first gripping rollers 63R and 63L rotate only in one direction.

  Further, as shown in FIG. 4, the transmission rollers 65aR and 65aL and the second connection rollers 64a and 64a are connected by belts 64c and 64c, and the second connection rollers 64a and 64a and the second gripping rollers 64R and 64L are connected by the belt 64b. , 64b. That is, as shown in FIG. 7, the rotational motion of the roller drive motor 65b is transmitted in the order of the transmission roller 65aR, the second connecting roller 64a, and the second gripping roller 64R. The transmission roller 65aL is connected to the distribution roller 66L by a belt 68, and the rotational movement of the distribution roller 66L is transmitted in the order of the transmission roller 65aL, the second connecting roller 64a, and the second gripping roller 64L.

  An open state and a gripping state of the sealed body gripping device M will be described with reference to FIG. FIG. 6A shows an open state, and FIG. 6B shows a grip state. In the open state, the roller support plate 62 is maintained in a substantially vertical posture, and in the gripping state, the roller support plate 62 is rotated by the action of the cylinder 62b to be in a substantially horizontal posture. In the gripping state, when the vicinity of the opening A of the packaging bag P is placed on the first bag support plate 60, the first gripping rollers 63R and 63L on the back side of the packaging bag P and the second gripping on the front side of the packaging bag P The left and right sides of the packaging bag P are gripped by the rollers 64R and 64L.

<Functional block diagram of the system>
Next, the function of the heat seal system according to the present embodiment will be described with reference to the block diagram of FIG. The control unit 100 controls the heat sealing device H and the sealed object gripping device M constituting the heat sealing system, and includes a CPU, a memory, a control program, and the like.

  The gripping member control means 100a controls the driving of the first and second gripping rollers 63 and 64, and the first and second gripping rollers 63, 64 rotation control is performed. The rotation amount of the gripping rollers 63 and 64 can be detected by detecting the motor drive amount by the motor drive amount detection means 101. The amount of rotation of the gripping rollers 63 and 64 may be controlled by time.

  In addition, the gripping member control unit 100 a issues a drive command to the first cylinder 62 b that drives the roller support plate 62. When the first cylinder 62b is OFF, the roller support plate 62 is in a vertical posture and the second gripping roller 64 is in an open state. When the first cylinder 62 b is turned on, the roller support plate 62 is in a horizontal posture, and the second gripping roller 64 is in a gripping state S in which the first gripping roller 63 is pressure-bonded. That is, the gripping region S of the packaging bag P can be gripped.

  The state of the first cylinder 62b can be detected by the first cylinder operation completion detection means 102. For example, it can be detected based on a signal from a sensor that detects the energized state of the first cylinder 62 b and the posture of the roller support plate 62. As described above, the roller support plate 62, the first cylinder 62b, and the drive mechanism that connects them function as a state switching mechanism for switching the first and second gripping rollers 63 and 64 between the gripping state and the open state. It is.

  The placement member control means 100 b performs drive control on the first and second bag support plates (first and second placement members) 60 and 51. Specifically, the postures of the first and second bag support plates 60 and 51 are set in a parallel posture in which the packaging bag P is stably placed and an inclined posture in which the packaging bag P is allowed to slide down from the placement surface. Switch. When the second cylinder 67 is OFF, the horizontal posture is maintained, and when the second cylinder 67 is turned ON, the tilt posture is switched.

  The state of the second cylinder 67 can be detected by the second cylinder operation completion detection means 103. For example, it can be detected based on the energized state of the second cylinder 67 and signals from sensors (not shown) that detect the postures of the first and second bag support plates 60 and 51.

  The crimping control means 100c provides a control function for sealing the opening A of the packaging bag P gripped by the sealed body gripping device M. By pressing down and controlling the crimping lever part 4, the gripping area S in the vicinity of the opening A of the packaging bag P is pressed and crimped, and the second pressing part 41 (corresponding to the seal crimping part) is pressed into the opening A. -Crimp. The crimping lever portion 4 is driven by a cylinder (not shown), and a drive command signal is output to the cylinder.

  The crimping lever operation amount detection means 104 detects the operating state of the crimping lever part 4. The operation state of the pressure-bonding lever portion 4 includes an open position where pressure bonding is not performed, a first pressure position where only the gripping region S is pressed by the first pressure portion 40 (corresponding to a pressure portion pressing near the opening), and the first pressure position. A three-stage state of the second pressing position where the pressing is further performed than the pressing position and the second pressing portion 41 is also crimped is detected. The detection of the operation amount can be performed based on the energized state of the cylinder, a sensor signal for detecting the position of the crimping lever portion 4, and the like.

  The crimp control means 100 c performs drive control for the heater 108 and the nozzle 43. The heating time, heating timing, cooling time, and the like for the heater 108 can be performed by a preset program. The same applies to the operation time and operation timing of the nozzle 43. The operation states of the heater 108 and the nozzle 43 can also be performed by the functions of the heater operation completion detection unit 105 and the nozzle operation completion detection unit 106.

  The sealed body gripping device control means 100d performs drive control on the sealed body gripping device M. The to-be-sealed body gripping device M needs to be controlled to move to each position such as an origin position, a seal position, and a discharge position. The origin position is a position where the packaging bag P is set in the sealed body gripping device M. The sealing position is a position where the opening A of the packaging bag P is sealed. The discharge position is a position where the sealed packaging bag P is discharged from the sealed body gripping device M. The position of the sealed object gripping device M can be detected by the function of the position detecting means 107.

<Operation flowchart>
Next, the operation of the heat sealing system according to the present embodiment will be described based on the flowchart of FIG. 9 and the operation diagrams shown in FIGS. 6, 10, and 11.

  First, the sealed object gripping device M is set at the origin position (S1). This state is a state in which the packaging bag P can be placed on the bag support plate, as shown in FIG. Next, the packaging bag P to be sealed is set on the bag support plate (S2). The packaging bag P is in a state in which predetermined contents are accommodated.

  Next, a start switch (not shown) is turned on (S3). Thereby, the first cylinder 62b is energized, and the roller support plate 62 is converted from the vertical posture to the horizontal posture. That is, the second gripping roller 64 is converted from the open state to the gripping state, and the left and right sides of the packaging bag P are gripped by the first and second gripping rollers 63 and 64, respectively (S4). Moreover, the state which hold | gripped the packaging bag P is shown by FIG.6 (b), FIG.10 (a), and FIG.11 (a).

  Next, the to-be-sealed body gripping device M is moved from the origin position to the seal position in this gripped state (S5). When moved to a predetermined sealing position, the working plate 70 is pushed by the contact surface 30 a of the heat sealing device H, and the tip of the working shaft 71 pushes the back surface of the inclined surface 51 a of the second bag support plate 51. Thereby, the 2nd bag support plate 51 is rotated around the connection shaft 60a, and is lifted (S6) (FIG.10 (b)).

  By this operation, the bottom D (see FIG. 2) opposite to the opening A of the packaging bag P is lifted. A large number of contents are accommodated inside the packaging bag P. When the packaging bag P is set, the contents may be accommodated biased toward the bottom D (FIG. 10A). )reference). Vacuuming the inside of the packaging bag P in this state is not preferable in terms of appearance and quality. Therefore, by lifting the bottom D as described above, the contents can be distributed as evenly as possible when the contents are biased toward the bottom D.

  Next, the roller drive motor 65b is driven to rotate the first and second gripping rollers 63 and 64 in the first direction (S7). This state is shown in FIG. Immediately after the packaging bag P is set and gripped by the first and second gripping rollers 63 and 64, the opening A is not always completely closed as shown in FIG. 11 (a). Instead, there may be a portion that is partially distorted and open. First, in order to eliminate this state, the first and second gripping rollers 63 and 64 are rotated in the first direction as described above.

  Since this rotation direction acts so as to pull both the left and right sides in the vicinity of the opening A outward, the opening A can be stretched. As a result, the opening A can be closed tightly.

  In this operation, both the first and second gripping rollers 63 and 64 are rotated in the same manner. However, since it is driven via a torque limiter, when a torque larger than necessary is applied, the torque limiter slips to cut off the transmission of power. Therefore, it is possible to prevent the packaging bag P from being inadvertently damaged.

  After the first and second gripping rollers 63 and 64 are rotated by a predetermined amount, the rotation of the first and second gripping rollers 63 and 64 is stopped (S8). The predetermined amount can be determined by detecting the amount of rotation of the roller drive motor 65b.

  Next, the second gripping roller 64 is rotated in the second direction (S9). At this time, the rotation direction of the roller drive motor 65b is opposite to that in the first direction. In this case, since the one-way clutch is provided, the power of the roller drive motor 65 b is not transmitted to the first gripping roller 63. Accordingly, only the second gripping roller 64 rotates while the first gripping roller 63 is stopped.

  This state is shown in FIG. That is, since only the surface side of the opening A of the packaging bag P is brought inward, an opening is formed at the center of the opening A. Since only the second gripping roller 64 is driven, only the front surface side of the packaging bag P is deformed so as to protrude upward as shown in the figure, so that an opening can be reliably formed. If the first gripping roller 63 is also rotated in the second direction in the same manner, there is a possibility that both the front surface side and the back surface side of the packaging bag P will be deformed upward, and that the opening will not be formed well. Become.

  After rotating the second gripping roller 64 by a predetermined amount, the rotation of the second gripping roller 64 is stopped (S10). The predetermined amount can be determined by detecting the amount of rotation of the roller drive motor 65b.

  Next, the nozzle 43 is inserted into the packaging bag P through the opening A in which the opening is formed (S11). This state is shown in FIG.

  Next, the first and second gripping rollers 63 and 64 are rotated again in the first direction (S12). As shown in FIG. 11D, since a gap is formed between the nozzle 43 and the opening, the gripping rollers 63 and 64 are driven to eliminate this gap.

  After rotating the first and second gripping rollers 63 and 64 by a predetermined amount, the rotation of the gripping rollers 63 and 64 is stopped (S13). This state is shown in FIG. 11 (e), where the gap around the nozzle 43 is eliminated and the nozzle 43 is in close contact.

  Next, the pressure-bonding lever part 4 is driven, the first pressing part 40 is pushed down, and the vicinity of the opening A is pressed (S14). With this pressed state, the inside of the packaging bag P and the outside air are completely shut off. Next, the nozzle 43 is operated, the air in the packaging bag P is discharged, and it is made vacuum (S15). When the operation of the nozzle 43 is completed, the nozzle 43 is allowed to escape from the packaging bag P (S16) (FIG. 11 (f)).

  Further, the crimping lever portion 4 is operated to push down the second pressing portion 41 (S17). Thereby, the opening A is crimped by the second pressing portion 41. Subsequently, the heater 108 is heated and the opening A is thermally welded to seal the opening A (S18).

  When heating for a predetermined time by the heater 108 is completed, the pressure-bonding lever portion 4 is opened (S19). And the to-be-sealed body holding | gripping apparatus M is moved from a sealing position to a discharge position (S20). The discharge position can be set at an appropriate place other than the origin position.

  When the movement to the discharge position is completed, the first cylinder 62b is driven to switch the second gripping roller 64 from the gripping state to the open state (S21). Thereby, the gripping state of the packaging bag P is released. Next, the second cylinder 67 is driven (S22). As a result, the postures of the first and second bag support plates 60 and 51 are changed to the inclined state, and the sealed packaging bag P slides down on the placement surface and is collected at a predetermined place (S23) ( FIG. 10 (c)). When the sealing operation of another packaging bag P is subsequently performed, the process returns to step S1 and the same operation may be repeated.

<Another embodiment>
In this embodiment, a configuration is employed in which the gripping rollers 63 and 64 provided on both the left and right sides in the vicinity of the opening A are driven. For example, the first and second gripping rollers 63 and 64 on the left side are employed. May be fixed so as not to rotate, and only the right first and second gripping rollers 63R and 64R may be driven.

  In the present embodiment, the first and second gripping rollers 63 and 64 are driven by one drive source (roller drive motor). However, the drive motor for the first gripping roller 63 and the drive motor for the second gripping roller 64 are used. May be separately provided and controlled.

  In the present embodiment, after the packaging bag P is gripped by the gripping rollers 63 and 64, the packaging bag P is immediately moved to the sealing position. However, the present invention is not limited to this. For example, the operations related to the gripping rollers 63 and 64 up to step S10 in FIG. 9 may be performed at the origin position and then moved to the seal position.

  In the present embodiment, the air in the packaging bag P is discharged by the nozzle 43, but the present invention can also be applied to the case where gas is introduced into the packaging bag P. Examples of the case of introducing a gas include an example of introducing nitrogen gas or the like for the purpose of removing oxygen in the air in order to prevent oxidation, prevent discoloration, preserve fragrance, and the like.

The perspective view which shows the external appearance structure of a heat seal apparatus Diagram showing the structure of the packaging bag The perspective view which shows the external appearance structure of a to-be-sealed body holding apparatus The perspective view which shows the internal structure of a bag holding part Sectional drawing which shows the internal structure of a bag holding part The figure which shows the state switching state of a bag holding part Schematic diagram showing the configuration of the transmission system up to the gripping roller Block diagram showing functions of heat seal system Flow chart showing the operation when performing sealing Diagram showing operation of bag support plate The figure which shows the operation | movement of a holding roller and the state of the opening part of a packaging bag

Explanation of symbols

A Opening portion C One-way clutch D Bottom portion P Packaging bag H Heat seal device M Sealed body gripping device T Torque limiter 4 Crimp lever portion 40 First press portion 41 Second press portion 43 Nozzle 51 Second bag support plate 60 First Bag support plate 62 Roller support plate 62b First cylinders 63, 63R, 63L First gripping rollers 64, 64R, 64L Second gripping roller 100 Control unit 100a Holding member control means 100b Placement member control means 100c Crimping control means 108 Heater

Claims (8)

A sealed body gripping device for gripping the opening, which is used when sealing an opening of a sealed body containing contents by a heat seal device,
A first gripping member disposed on each of the left and right sides in the vicinity of the opening, and disposed on the back side of the sealed body;
A second gripping member disposed on the surface side of the sealed body so as to face the first gripping member;
A state switching mechanism for switching the first and second gripping members between a gripping state and an open state;
Gripping member control means for controlling the driving of the first and second gripping members,
The gripping member control means holds the first and second gripping members in the first and second gripping members so that the openings are tightly closed after gripping the left and right sides of the sealed object by the first and second gripping members. Then, at least one of the first and second gripping members is driven in the second direction to open the center in the width direction of the opening, and the gas inside the sealed body is discharged. A nozzle for introducing gas into the sealable body can be inserted into the sealed body through the opening, and after the nozzle is inserted, the first and second gripping members are driven again in the first direction to close the opening. A sealed body gripping device that controls the first and second gripping members so as to be in a closed state.   The first gripping member and the second gripping member are gripping rollers having at least a surface having elasticity, and are set so that rotation directions are opposite to each other in the first direction and the second direction. The sealed body gripping device according to claim 1, wherein   When driving in the first direction, both the first and second gripping members are rotated, and one of the first and second gripping members is rotated by a drive source via a torque limiter. The sealed body gripping device according to claim 2.   4. The sealed body gripping apparatus according to claim 1, wherein when driving in the second direction, only one of the first and second gripping members is driven. 5.   The sealed body gripping apparatus according to claim 4, wherein one of the first and second gripping members is driven by a drive source via a one-way clutch. A first mounting member on which the vicinity of the opening of the sealed body is mounted;
A second mounting member on which a portion other than the opening is mounted;
A connecting means for connecting the first mounting member and the second mounting member via a connecting shaft;
A mounting member rotating mechanism that forcibly rotates the second mounting member around the connecting shaft so that the bottom side of the sealed body is lifted with respect to the opening before heat sealing. The sealed object gripping device according to claim 1, wherein the device is a sealed body gripping device.   A posture switching mechanism for switching the postures of the first and second mounting members is provided, and a parallel posture in which the sealed body is stably placed on the respective mounting surfaces, and the sealed body from the mounting surface The device for gripping an object to be sealed according to any one of claims 1 to 6, wherein the device can be switched to an inclined posture that allows sliding down. A sealed body gripping device according to any one of claims 1 to 7,
A heat seal device for sealing the opening, and a heat seal system comprising:
The heat sealing device
A pressing portion that presses the vicinity of the opening, and a pressure-bonding operation portion that includes a seal pressure-bonding portion having a heater 108 for sealing the opening;
The crimping operation unit, and a crimping control means for controlling the operation of the nozzle,
The pressure-bonding control means is an operation that, after the nozzle is inserted into the sealed body, presses the vicinity of the opening by the pressing portion and causes the nozzle to escape from the sealed body after the gas is discharged or introduced by the nozzle. The heat seal system is further controlled so that the opening is crimped by the seal crimping portion and the opening is sealed by the heater.

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