JP6857958B2 - Ironing device in vertical packaging machine - Google Patents

Description

The present invention relates to a vertical bag packaging machine including a horizontal heater unit for forming a bag for packaging a product by applying a horizontal seal to a tubular packaging material, such as a vertical bag-making filling and packaging machine. The present invention relates to a squeezing device that operates in conjunction with a horizontal heater unit and exerts a squeezing action in a range including a planned horizontal sealing area of the tubular packaging material in which the product is filled through the inside.

Packing products into bags With regard to bagging, the product position can be moved within the bag or the filling rate of the product can be improved by pushing the product into the bag from the outside of the bag during bag packaging. I may try. Examples of the products to be squeezed in the bags include opu (food made from coarse wheat flour). After packaging, the packaging is forcibly squeezed from the outside of the bag to prevent it from moving into the elongated bag. Other product examples include snacks such as potato chips and corn puffs and frozen foods such as frozen potatoes, green beans and pumpkins. These products vary in length, and depending on the dancing state of the product at the time of filling, it may jump up to the horizontal seal position. In such a case, the heat seal bar is used for the horizontal seal. Biting occurs. Therefore, it is necessary and effective to move the product from the operating position of the heat seal bar into the bag in advance by squeezing the bag.

As an ironing device used in connection with a vertical packaging machine such as a vertical bag filling and packaging machine, the operation when the horizontal sealing unit used in the vertical packaging machine applies a horizontal seal to a tubular packaging material is used. Then, there is something that works like a squeeze. For example, there is a type in which the entire horizontal seal box is moved up and down, and some percentage of the stroke is used as an operation for a squeezing operation. Apart from this, the horizontal seal box is not moved up and down, but a cylinder or other separate drive source is provided, and the ironing member is squeezed by the separate drive source while the horizontal seal block is opened and closed. is there.

The applicant, as an ironing device for a vertical bag-making filling and packaging machine, seals the packaging cylinder with a horizontal heater, drops and fills the packaging cylinder with loose products as a product, and then lowers the packaging cylinder from the horizontal heater. We have proposed a squeezing device that prevents the horizontal heater from biting into the product by sandwiching the required surface from the same direction as the horizontal heater and squeezing it below the horizontal heater before the horizontal heater closes (Patent Document). 1). According to the ironing device of this vertical bag filling and packaging machine, when the horizontal heater is opened, the ironing rod opens so as not to hit the product falling in the packaging cylinder, passes through the inside of the horizontal heater, and rises higher than the horizontal heater. To do. Next, as the lateral heater closes, the ironing rod closes before the lateral heater, passes through the inside of the lateral heater, and descends below the lateral heater. At that time, the product is prevented from being bitten by the horizontal heater by squeezing the product that accumulates at the same height as the horizontal heater or the product that is in the process of falling. After that, horizontal sealing is performed by a horizontal heater.

Further, the applicant interlocked with the operation in which each of the lateral seal portions approaches the tubular packaging material for sealing the tubular packaging material from the initial position occupied when the lateral seal portions are in a separated state. In the forward operation, it comes into contact with the tubular packaging material through the ironing path and squeezes downward, and at the same time, it is linked with the operation in which each of the horizontal sealing portions separates from the tubular packaging material after sealing. A squeezing device including a squeezing member that follows a return path away from the tubular packaging material to the rear side and returns to the initial position at the time of the return operation, and is provided for each of the lateral seal portions and has a tip. A first cam mechanism that defines the ironing path to which the ironing member is attached, the ironing path and the return path of each ironing member, and switches the engagement state with the ironing portion between the forward operation and the return operation. The first cam mechanism is provided with a second cam mechanism that directly engages with the squeezing portion and determines the limit on the squeezing side of the squeezing path of each squeezing member, and the first cam mechanism is formed with a cam groove. A movable cam plate whose position is switched between when each ironing member reaches the end of the ironing path and when it reaches the end of the return path, and a movable cam plate provided in the ironing portion and in the cam groove. The cam groove is provided with a first cam follower that fits into the cam groove, through which the first cam follower passes when the movable cam plate occupies one of the positions and the ironing member follows the ironing path. Corresponds to when the rotating cam groove portion is connected to the rotating cam groove portion and the movable cam plate is switched to move to the other position, and when the ironing member follows the initial stage of the return path. Therefore, a squeezing device is proposed in which the first cam follower has a delay cam groove portion through which the squeezing member passes without changing the posture (see Patent Document 2).

According to this ironing device, in the return operation in which the ironing member separates from the tubular packaging material and moves away from the tubular packaging material, a return route different from the ironing path in the forward operation in which the ironing operation approaches and is performed is followed. We are trying to prevent the movement from interfering with the packaging movement and packaging materials. Further, since the ironing path and the return path are defined by mechanical mechanisms called the first cam mechanism and the second cam mechanism, respectively, the ironing member reliably follows the ironing path and the return path different from the ironing path. I am trying. Further, since the second cam mechanism sets the limit on the ironing side of the ironing path of each ironing member, the ironing member is designed not to come too close to the tubular packaging material beyond the limit on the ironing side. .. Further, in the forward operation of the lateral seal portion, in the first cam mechanism, the first cam follower passes through the rotating cam groove portion, and the second cam mechanism sets the ironing side limit of each ironing member, thereby ironing. The member follows the ironing path. When the ironing member reaches the end of the ironing path, the position of the movable cam plate is switched, but the first cam follower only passes through the delay cam groove portion, and the posture of the ironing member does not change. In the return operation of the lateral seal portion, the operation of the ironing member is delayed while the first cam follower passes through the delay cam groove portion in the opposite direction (the direction connected to the rotation cam groove portion). At this time, the ironing member does not substantially change its posture, and the ironing member retracts to the rear side with respect to the tubular packaging material. After that, the ironing part follows the return route, but does not interfere with the tubular packaging material and push it up. When the ironing member reaches the end of the return path, the movable cam plate is switched to return to the initial state.

Further, the applicant applies to a squeeze drive unit provided for each lateral seal portion and operated in conjunction with the operation of bringing the two lateral seal portions into contact with each other, and a tubular packaging material driven by the squeeze drive unit. A squeeze mechanism having a squeeze member that comes into contact with the squeeze to give a squeeze action, and is arranged between the frame on which the horizontal seal unit is arranged and the squeeze drive unit. It is equipped with a drive cam mechanism that gives operation, and a path cam mechanism that is arranged between the frame on which the horizontal seal unit is arranged and the ironing member and determines the ironing path of the ironing member driven by the ironing drive unit. The path cam mechanism is equipped with a fixed cam plate for the path on which the cam groove for the path corresponding to the ironing path is formed, and a cam follower for the path provided in the ironing member and fitted to the cam groove for the path. The mechanism is configured to be able to absorb the relative displacement that occurs between the ironing drive unit that reciprocates by the drive cam mechanism and the ironing member that follows the ironing path by the path cam mechanism when driven by the ironing drive unit. We have proposed a squeezing device (see Patent Document 3).

According to this ironing device, when the ironing drive unit of the ironing mechanism performs a cam operation by the driving cam mechanism to drive the seal member in response to the operation of the lateral seal portion approaching / separating from the packaging material, another path is provided. The cam mechanism determines the ironing path followed by the ironing member of the ironing mechanism. When following this ironing path, the ironing member comes into contact with the tubular packaging material to exert an ironing action. Therefore, even if the packaging speed is increased, the ironing member can move along the only defined ironing path and prevent the violent movement. The path cam mechanism includes a fixed cam plate for the path on which the cam groove for the path corresponding to the ironing path is formed, and a cam follower for the path provided in the ironing member and fitted to the cam groove for the path. Is driven, the path cam follower is guided in a state of being fitted in the path cam groove, and the ironing bar performs a stable ironing operation without runout along a predetermined ironing path. Further, the ironing mechanism can absorb the relative displacement generated between the ironing drive unit that reciprocates by the drive cam mechanism and the ironing member that follows the ironing path by the path cam mechanism when driven by the ironing drive unit. Therefore, the ironing member moves to follow the ironing path by the path cam mechanism according to the reciprocating motion of the ironing drive unit. The ironing path is a path determined by the path cam mechanism, but by configuring it so that the relative displacement that occurs between the two can be absorbed, mechanical interference and competition occur between the ironing drive unit and the ironing member. Can be avoided.

In the conventional ironing device, shutters are arranged above and below the horizontal seal unit to prevent the product from falling by sandwiching the tubular packaging material from the outside, and the horizontal sealer unit moves up and down. There is a type of ironing device. In this case, the product (granular debris) sandwiched between the upper and lower shutters cannot be excluded from the planned horizontal seal area, and remains between the shutters. In addition, the old type of ironing bar that irons the tubular packaging material, when the ironing bar that ironed when moving downward, tries to return to the upper position by the immediate return operation after that. There is an inconvenience that the ironing bar comes into contact with the tubular packaging material that is descending to form the next bag and lifts the tubular packaging material.

In the conventional ironing device, the cam mechanism that determines the path of the ironing member by the cam follower is complicated, such as the first cam mechanism, the second cam mechanism, and the cam groove for the path, in which the cam follower is fitted. It has a cam groove structure that is shaped and formed with high accuracy, and it is inevitable that the production of the cam mechanism requires cost and labor. Further, the operation of the ironing device is uniquely determined by the cam mechanism manufactured in the groove structure, and it is difficult to give flexibility to the operation of the ironing rod depending on the case and the situation.

Japanese Patent Publication No. 06-76087 (paragraphs [0007] to [0011], FIGS. 1 to 3) Japanese Patent No. 5331273 (paragraph [0037], FIG. 9) Japanese Patent No. 5433231 (paragraph [0030], FIG. 3)

Therefore, in a vertical bag packaging machine provided with a horizontal heater unit that forms a bag for packaging a product by applying a horizontal seal to the tubular packaging material, the horizontal heater unit is used as a tubular packaging material to apply the horizontal seal. For the ironing device that operates in conjunction with the movement of approaching and separating from the product and performs the ironing operation within the range including the planned horizontal sealing area of the tubular packaging material in which the product is filled through the inside, the tubular packaging material is used. It should be solved in that the mechanical structure that determines the ironing path of the ironing rod that performs the ironing operation is realized by a simpler cam structure instead of the cam groove structure, and it is possible to give flexibility to the ironing operation. There are challenges.

An object of the present invention is to solve the above-mentioned problems, and in the above-mentioned vertical bag packaging machine, a simple cam is provided with a mechanical structure for determining an ironing path of an ironing rod that performs an ironing operation on a tubular packaging material. It is to provide an ironing device provided by a cam mechanism with a structure.
In addition, the horizontal heater unit operates in conjunction with the operation of approaching and separating from the tubular packaging material, sandwiching the tubular packaging material at a position above the planned horizontal sealing area, and placing the product in the tubular packaging material. If a shutter is provided inside, the ironing device can avoid the biting of granular debris of the product as much as possible during horizontal sealing, considering the arrangement of the shutter and the ironing rod that occupies the ironing operation start position. Is to provide.
Furthermore, the forward movement of the ironing rod is routed by the cam surface, but the returning operation is not routed by the cam. For example, the ironing rod is manufactured from a tubular packaging material by returning in a timely manner by operating an air cylinder. It is an object of the invention to provide an ironing device that allows a suitable time and effective distance from the bag to be operated and a quick return to the starting position of the ironing path (the starting position of the closing operation).

In order to solve the above problems, the ironing device in the vertical bag packaging machine according to the present invention causes the cam follower to follow the cam surface of the fixed cam plate in the forward operation of the ironing operation in the vertical bag packaging machine. A squeeze unit having a squeeze rod that follows a squeeze path and follows a return path when the squeeze operation is restored is provided. When the first half of the ironing path is followed, the tubular packaging material is contacted at the ironing start position, and when the latter half of the ironing path is followed, the tubular packaging is used. While moving downward while being in contact with the horizontal sealing planned area of the material, a squeezing operation is performed on the horizontal sealing planned area, and the squeezing rod is a tubular packaging material in which the horizontal heater unit having the horizontal sealing is applied. After being separated from the cam follower, the return path is started to be traced, and when the return path is started to be traced, the cam follower is separated from the cam surface of the cam plate and from the ironing end position to the tubular packaging material. On the other hand, it is characterized by retreating in the direction of separation.

According to the ironing device in this vertical bag packaging machine, the ironing rod provided in the ironing unit follows the ironing path according to the cam follower following the cam surface of the fixed cam plate during the forward operation of the ironing operation. To. Therefore, the means for causing the ironing rod to perform the ironing operation is realized not by the cam groove structure but by a simple cam structure in which the cam follower follows the cam surface. Further, when the ironing rod follows the return path from the end position of the forward operation of the ironing operation to the start position of the forward operation after the recovery operation of the ironing operation, the path is not uniquely defined by the cam groove structure. Since the cam follower retracts in a state of being separated from the cam surface of the cam plate, it is possible to give flexibility to the return operation such as the ascending timing for lifting the iron rod when returning to the start position of the forward operation of the ironing operation. Further, there is a possibility that a bag may adhere to the horizontal heater unit that becomes hot, but the direction in which the horizontal heater unit with the horizontal seal applied to the tubular packaging material intersects the tubular packaging material from the tubular packaging material. after the spaced, peristaltic bar starts tracing of the return path, once retracted in a direction away from the end position of the forward operation of the operation ironing rod ironing against the tubular packaging material, then a return path than that traverse the front of a horizontal sealing surface of the horizontal heater unit in the vertical direction in tracing, when the horizontal heater unit tries to retract, moving in a direction away from the tubular packaging material, squeezing rod is still cylindrical By staying at the end position of the forward operation of the ironing operation without being separated from the packaging material, the bag attached to the horizontal heater unit can be peeled off from the horizontal heater unit.

In the squeezing device in this vertical bag wrapping machine, the squeezing unit includes a squeezing bar base that operates in conjunction with an operation in which the horizontal heater unit approaches and separates from the tubular packaging material, and the squeezing bar base. On the other hand, the ironing lever is provided so as to be rotatable around a rotation shaft parallel to the ironing rod, and the ironing lever has the ironing rod at the tip portion and the cam follower at the rear end portion. When the ironing unit advances toward the tubular packaging material, the cam follower follows the cam surface of the cam plate, so that the ironing rod follows the ironing path, and the ironing rod follows the ironing path. As the ironing lever rotates around the rotation axis, the ironing rod can follow the latter half of the ironing path to perform the ironing operation.
According to this squeezing device, the squeezing unit is simply assembled by a squeezing rod base, a rotating shaft, and a squeezing lever having a squeezing rod and a cam follower, and squeezing by the cam action by the cooperation of the cam follower and the cam plate. The rod can be made to follow the ironing path, and when following the latter half of the ironing path, the ironing operation can be performed.

In the ironing device in this vertical bag packaging machine, the ironing unit includes an air cylinder that connects the ironing lever to the ironing rod base, and the air cylinder is such that the ironing rod follows the return path. Occasionally, it operates at an arbitrary timing to rotate the ironing lever in such a manner that the ironing rod is lifted and the cam follower abuts on the cam surface of the cam plate to return to the initial position of the ironing path. Can be.
According to this ironing device, it is the air cylinder that determines the route to be followed when the ironing rod returns to the initial position of the ironing route. Therefore, the return timing and return speed of the ironing rod are controlled by the cylinder. It can be decided arbitrarily, and a flexible return motion can be obtained.

In the ironing device in this vertical bag packaging machine, the air cylinder retracts in the direction in which the ironing rod separates from the tubular packaging material in response to the operation of the horizontal heater unit separating from the tubular packaging material. It can be activated when it is finished.
According to this ironing device, the lateral heater unit is separated from the tubular packaging material, the air cylinder is operated after the lateral sealing surface is fully opened, and the ironing rod is moved to the starting position of the ironing path (the starting position of the closing operation). ), So the ironing rod moves backward and then rises. Therefore, the ironing rod does not interfere with lifting the tubular packaging material that is descending for the formation of the next bag, and does not affect the feeding of the packaging material.

In the ironing device of this vertical bag packaging machine, a spring and a stopper for regulating the distance when approaching each other are provided between the horizontal heater unit and the ironing unit. , When the operation of approaching the tubular packaging material is performed, the ironing unit is made to perform the ironing operation via the spring, the lateral seal is applied, and then the operation of separating from the tubular packaging material is performed. The ironing unit may maintain the ironing end position by the action of the restoring force of the spring until the lateral heater unit comes into contact with the ironing unit via the stopper.
According to this ironing device, when the horizontal heater unit initially seals the tubular packaging material and then separates from the tubular packaging material, only the horizontal heater unit returns and irons. The rod keeps the ironing end position in contact with the tubular packaging material by the action of the restoring force of the spring. After the lateral heater unit is further retracted and approaches the interval regulated by the stopper with respect to the ironing unit, that is, after it comes into contact with the ironing unit through the stopper, the lateral heater unit is together with the ironing unit (ironing rod). fall back. Therefore, at the beginning when only the horizontal heater unit returns, the ironing rod keeps the ironing end position, so that the horizontal heater unit tries to move while adhering the bag due to the heat. Can play the function of peeling off from the horizontal heater unit.

In the ironing device in this vertical bag packaging machine, the vertical bag packaging machine operates together with the ironing unit in conjunction with an operation in which the horizontal heater unit approaches and separates from the tubular packaging material. The tubular packaging material is provided with a shutter that sandwiches the tubular packaging material at a position above the planned horizontal sealing area to receive the product in the tubular packaging material, and the ironing rod sandwiches the tubular packaging material. The distance between the shutter and the shutter can be set as narrow as possible. According to this ironing device, the range between the shutter and the ironing rod, which are sandwiched at a position above the planned horizontal seal area and receive the product in the tubular packaging material, is sufficiently narrow, and if the product is debris, etc. Even if the product may adhere to the inside of the tubular packaging material, the product debris is trapped within this narrow range, and then nothing is chewed in the planned lateral seal area where the ironing rod exerts the ironing motion. A horizontal seal can be applied without leaving any inclusions.
In this case, further, when the vertical bag packaging machine includes the shutter that operates together with the ironing unit, the spring is provided between the horizontal heater unit and the shutter in a compressed state, and the spring. Restoring force can act on the ironing unit via the shutter. At the beginning when the horizontal heater unit returns in the direction away from the tubular packaging material, the restoring force of the spring is received by the shutter sandwiching the tubular packaging material, and the ironing unit (ironing rod) is Keep the ironing end position.

In the ironing device in this vertical bag wrapping machine, the vertical bag wrapping machine puts a filling cylinder, which is arranged inside the tubular wrapping material and into which the product to be packaged is charged, and the tubular wrapping material. It can be said that it is a vertical bag-making filling and packaging machine provided with a feeding mechanism for feeding in the vertical direction along the outer peripheral surface of the filling cylinder.
According to the ironing device, by applying a vertical bag filling packaging machine as a vertical bag packaging machine, it is possible to sequentially continuously packaging products with high packaging speed to be introduced through the fill tube.

Since the ironing device in the vertical bag packaging machine according to the present invention is configured as described above, the ironing rod provided in the ironing unit follows the cam surface of the fixed cam plate during the forward operation of the ironing operation. Ru Tado the ironing path in response to the. Therefore, the means for causing the ironing rod to perform the ironing operation is realized not by the cam groove structure but by a simpler cam structure of following the cam follower and the cam surface. Further, in the return path of the ironing rod, the cam follower does not return via the path uniquely defined by the cam groove structure, but retracts in a state away from the cam surface of the cam plate, so that the cam follower returns to the initial position of the ironing path. It is possible to give flexibility to the return operation such as the timing when returning, and to avoid interference such as lifting the tubular packaging material that is descending for the formation of the next bag. The starting position for ironing the tubular packaging material with the ironing rod can be set to any preferable position by setting the cam surface of the cam plate, so that granular materials such as product debris can be removed from the planned horizontal sealing area of the tubular packaging material. It can be reliably squeezed out, and the occurrence of biting in the planned horizontal sealing area of the tubular packaging material can be reduced as much as possible. Further, when the horizontal heater unit comes into contact with the tubular packaging material to perform horizontal sealing, the high-temperature horizontal heater unit adheres to the horizontal sealing portion of the bag, and the horizontal heater unit retracts in a direction away from the tubular packaging material. Occasionally, the attached bag also tries to move with it, but according to this ironing device, a horizontal heater unit with a horizontal seal on the tubular packaging material intersects the tubular packaging material from the tubular packaging material. After being separated in the direction, the ironing rod starts to follow the return path, and the ironing rod is once separated from the tubular packaging material from the end position of the forward operation of the ironing operation while following the return path. retracted, then Ru transected anterior horizontal sealing surface of the horizontal heater unit in the vertical direction. Therefore, at the initial time of the return when the horizontal heater unit starts the return operation and separates from the tubular packaging material, the ironing rod is not yet separated from the tubular packaging material and remains at the end position of the forward operation of the ironing operation. Therefore, the bag attached to the horizontal heater unit can be peeled off from the horizontal heater unit.

FIG. 1 is a perspective view showing the entire seal / ironing unit used in the ironing device in the vertical bag packaging machine according to the present invention. FIG. 2 is a perspective view showing a portion related to the lateral heater taken out from the seal / ironing unit shown in FIG. FIG. 3 is a perspective view showing the seal / ironing unit shown in FIG. 1 with the portion related to the lateral heater and the air cylinder shown in FIG. 2 removed. FIG. 4 is a perspective view showing the seal / ironing unit shown in FIG. 1 with the portion related to the lateral heater shown in FIG. 2 removed. FIG. 5 is a process diagram illustrating a closing (squeezing) operation and an opening (squeezing release) operation of the squeezing unit in particular in the seal / squeezing unit. FIG. 6 is a partial view illustrating the operation of the lateral heater block, the shutter, and the ironing rod in the seal / ironing unit. It is a perspective view which shows an example of the conventional vertical bag making filling and packaging machine.

Hereinafter, examples of the ironing device in the vertical bag packaging machine according to the present invention will be described with reference to the attached drawings.
FIG. 1 is a perspective view showing the entire seal / ironing unit used in the ironing device in the vertical bag packaging machine according to the present invention, and FIG. 2 shows a portion related to a horizontal heater from the seal / ironing unit shown in FIG. It is a perspective view taken out and shown, FIG. 3 is a perspective view showing the seal / ironing unit shown in FIG. 1 with the portion related to the lateral heater and the air cylinder shown in FIG. 2 removed, and FIG. 4 is a perspective view shown in FIG. It is a perspective view which shows by removing the part about the lateral heater shown in FIG. 2 from the seal / ironing unit shown.

The ironing device according to this embodiment can be applied to a known vertical bag-making filling and packaging machine. As outlined in FIG. 7, the vertical bag-making filling and packaging machine 50 includes a former 51 that bends the web-shaped packaging material Fw into a substantially tubular shape, and a product filling cylinder 52 inserted inside the former 51. , A vertical sealing device 53 for molding a packaging material curved on the front side of the product filling cylinder 52 into a tubular packaging material Ft, and a tubular packaging material Ft provided so as to sandwich both left and right sides of the product filling cylinder 52. It includes a feed belt device 55 that is sandwiched between the outer surface of the product filling cylinder 52 and fed, and a horizontal seal unit 54 provided below the product filling cylinder 52. The continuous web-shaped packaging material Fw is guided by the former 51 and bent into a tubular shape so as to wrap the product filling cylinder 52, is fed downward by the feed belt device 55, and is vertically sealed on one side of the product filling cylinder 52. It is formed in the tubular packaging material Ft by vertically heat-sealing the edges of the webs by the device 53. The product S, which is the object to be packaged, is dropped and filled into the tubular packaging material Ft through the product filling cylinder 52, and the tubular packaging material Ft is sealed by the horizontal sealing unit 54 at both the upper and lower positions of the filled product S. The bag package Bp in which the product S is packaged can be continuously produced.

As shown in FIG. 7, the horizontal seal unit 54 has horizontal seal portions 54a and 54b arranged so as to face each other with the tubular packaging material Ft interposed therebetween, and has a cutter 56 built therein. The cutter 56 is arranged so as to be able to advance and retreat toward the other horizontal seal portion 54b between the upper and lower pair of heat seal bars of the heater block provided in one horizontal seal portion 54a, for example. The other horizontal seal portion 54b is formed with a cutter groove 57 in which the advanced cutter 56 can enter between the pair of upper and lower heat seal bars of the heater block. The horizontal seal unit 54 approaches and separates from the side when its operation is performed, and the horizontal seal portions 54a and 54b sandwich the tubular packaging material Ft and form a bag B following the mouth of the preceding bag packaging body Bp. Heat seal the bottom of the bag. At this time, the cutter 56 advances to a position in the cutter groove 57 to cut the tubular packaging material Ft, and separates the previously manufactured bag packaging body Bp from the subsequent bag B (cylindrical packaging material Ft). To do. Although not shown above the horizontal seal unit 54, when the product S to be loaded is temporarily received in the middle and the horizontal seal portions 54a and 54b are separated, the received product S is released to the bottom of the bag 62. It is also possible to provide a shutter to be turned on. It should be noted that the outline of the ironing arms 58 and 58 of the conventional structure and the ironing bar 59 provided over the tip portion thereof is shown.

In order to drive the lateral seal unit 54, a drive motor such as a servomotor (not shown) or a drive mechanism using the output of an actuator such as an air cylinder is used. As an example of the drive mechanism, similarly to the mechanism described in Patent Document 1, a horizontal seal opening / closing lever (hereinafter, abbreviated as “lever”) is rotated, and the rotation is converted into a conversion mechanism such as a screw mechanism. A mechanism for bringing the lateral seal portions 54a and 54b closer to each other and separated from each other in synchronization with each other can be mentioned.

1 to 4 are seal / ironing units used in the ironing device in the vertical bag packaging machine according to the present invention, and show the seal / ironing unit 1 arranged on one side of the tubular packaging material. .. The vertical bag wrapping machine is provided with a seal / ironing unit on each side of the tubular wrapping material, and both seal / ironing units are synchronized with each other with respect to the planned horizontal seal portion of the tubular wrapping material. It operates in cooperation, and when there is adhesion of product debris on the planned horizontal seal part, it performs a squeezing action to push down such deposits, and the horizontal seal is applied to the planned horizontal seal part where the squeezing has been performed. FIG. 1 FIG. 4 shows only the seal / ironing unit 1 arranged on one side. Further, the vertical bag wrapping machine may be a vertically used bag-making filling and wrapping machine, and the details thereof will not be described again.

Of the seal / ironing unit 1 shown in FIG. 1, the portion related to the horizontal heater is shown in FIG. The horizontal heater unit 2 shown in FIG. 2 includes a horizontally elongated block-shaped horizontal heater block base 3 and a horizontal heater block 6 attached to the front surface 4 of the horizontal heater block base 3. The horizontal heater block 6 has a length W sufficient to apply a horizontal seal to the flatly crushed tubular packaging material. The horizontal seal surface 7 of the horizontal heater block 6 has a seal height (horizontal seal width) H sufficient to obtain a horizontal seal of the bag on a tubular packaging material that has been flattened. As embodied in the horizontal seal unit 54 shown in FIG. 7, the horizontal heater unit 2 can also incorporate a cutter device for separating the bag package from the tubular packaging material. The lateral heater unit 2 is driven by a driving device (not shown) so as to advance and retreat in the front-rear direction, that is, with respect to the tubular packaging material.

The horizontal heater unit 2 is provided with a squeezing unit 10 for exerting a squeezing action on the tubular packaging material. An ironing unit base 11 that supports the ironing unit 10 is attached to the upper surface 5 of the lateral heater block base 3 of the lateral heater unit 2. The ironing unit base 11 is a bar-shaped member extending along the longitudinal direction of the lateral heater block base 3, and bearing holes 11a formed at two positions at both ends in the longitudinal direction for guiding the slide shaft described later. , 11a and loading holes 11b and 11b for attaching stoppers that also serve as spring receivers are formed so as to open through the front surface (rear surface) 13. The ironing unit base 11 is attached to the lateral heater block base 3 by screwing an appropriate fastener such as a mounting bolt through the mounting holes 11c and 11c opened in the upper surface 12 into the lateral heater block base 3.

As shown in FIG. 3, the ironing unit 10 also has a shutter function for preventing the product from falling into the bag for which the lateral seal is to be applied. The shutter unit 14 and the ironing rod unit 15 are slidably supported in the ironing unit base 11 in the front-rear direction. Specifically, the ironing unit base 11 is provided with slide shafts 17 and 17 slidable in the front-rear direction via slide bearings 16 and 16 mounted in the bearing holes 11a and 11a. A shutter unit 14 is arranged at the front ends 17a of the slide shafts 17 and 17, and an ironing rod unit 15 is arranged at the rear ends 17b of the slide shafts 17 and 17. Since the ironing unit 10 is attached to the lateral heater unit 2, the ironing rod unit 15 is scheduled to laterally seal the tubular packaging material according to the movement of the lateral heater unit 2 advancing and retreating with respect to the tubular packaging material. Performs a squeezing operation on the part including the part.

The shutter unit 14 includes a shutter base plate 18 attached to the front ends 17a of the slide shafts 17 and 17, and a shutter 19 attached to the front surface of the shutter base plate 18. The shutter 19 cooperates with the shutter on the other side to sandwich the tubular packaging material from the outside to the front and back at a position directly above the horizontal heater unit 2 with respect to the tubular packaging material, thereby passing the product through the filling cylinder. Is a member that prevents the product from falling below the shutter when the product is filled in the tubular packaging material. The shutter 19 has a lateral length equal to or larger than the lateral width of the flatly crushed tubular packaging material. Conventionally, the shutter is used as two shutters (upper shutter and lower shutter) that act at two positions sandwiching the planned horizontal seal area vertically, but the shutter of this embodiment corresponds to the upper shutter. Only one shutter is used, and the one corresponding to the lower shutter itself is not used.

Coil springs 20 and 20 are provided between the ironing unit base 11 and the shutter base plate 18 at positions inside the slide shafts 17 and 17 so as to arrange the coil axes in the front-rear direction. Since the shutter 19 cannot advance further when it comes into contact with the tubular packaging material in cooperation with the shutter on the other side, when the ironing unit base 11 tries to advance further together with the lateral heater unit 2, the shutter 19 cannot advance further. The ironing unit base 11 can further compress the coil springs 20 and 20 to move forward. On the contrary, even when the ironing unit base 11 returns to the rear, the ironing unit base 11 retracts in a state where the shutter 19 is urged by the restoring force of the coil springs 20 and 20 and is in contact with the tubular packaging material. To do.

The ironing rod unit 15 arranged at the rear end of the slide shafts 17 and 17 includes an ironing rod base 21 attached to the slide shafts 17 and 17 and an air cylinder mounting base 22 fixed to the ironing rod base 21. A rotating shaft 23 arranged on the ironing rod base 21, a pair of ironing levers 24 and 24 rotationally supported around the rotating shaft 23 at both ends of the rotating shaft 23, and ironing levers 24 and 24, respectively. It is equipped with a squeeze bar 25 spanned over the front end of the. The ironing rod base 21, the rotating shaft 23, and the ironing rod 25 all extend in parallel with the direction in which the lateral heater unit 2 extends.

A stopper 26 is loaded into, for example, the loading holes 11b and 11b of the ironing unit base 11 so that the ironing unit base 11 and the ironing rod base 21 move integrally with each other when they approach each other by a certain distance or more. It is provided in such a manner. The stopper 26 is a spring receiver that receives the ends of the coil springs 20 and 20 on the shutter unit 14 side. The stopper 26 does not advance any further when the shutter unit 14 and the ironing rod unit 15 are moved forward relative to the ironing unit base 11 by the action of the restoring force of the coil springs 20 and 20. Regulate the distance. Therefore, when the lateral heater unit 2 advances, the ironing rod unit 15 passes through the stopper 26 based on the restoring force of the coil springs 20 and 20 until the tip of the shutter 19 comes into contact with the tubular packaging material. It follows the lateral heater unit 2 while still in contact with the base 11 (that is, while maintaining the interval determined by the length of the stopper 26), and after the tip of the shutter 19 abuts on the tubular packaging material, it is lateral. The heater unit 2 further advances while compressing the coil springs 20 and 20, is separated from the contact with the ironing rod unit 15 via the stopper 26, and the sealing surface 7 is pressure-welded to the planned horizontal sealing area of the tubular packaging material. And the horizontal seal is started. Further, when the lateral heater unit 2 retracts after the lateral sealing, the shutter unit 14 and the ironing rod unit 15 hold the positions where they come into contact with the tubular packaging material due to the action of the restoring force of the compressed coil springs 20 and 20. When the ironing unit base 11 approaches the ironing rod base 21 to the length of the stopper 26 (the ironing unit base 11 comes into contact with the ironing rod base 21 via the stopper 26), the shutter unit 14 and the ironing rod unit 15 retracts together with the lateral heater unit 2.

The pair of ironing levers 24, 24 are rotatably supported by the ironing rod base 21 by the rotating shaft 23 at a position closer to the center rear. Each ironing lever 24 has a straight long plate-shaped portion 27 in the center in the longitudinal direction, a tip portion 28 following a shape that bends toward the tip end side of the plate-shaped portion 27, and a rear end portion 29 following the rear end side of the plate-shaped portion 27. And have. The ironing rod 25 is bridged between the front ends of the ironing levers 24 and 24, that is, between the pair of tip portions 28 and 28. Cylindrical cam followers 30 and 30 are provided at the rear ends of the ironing levers 24 and 24, that is, the pair of rear end portions 29 and 29. The cam followers 30 and 30 abut on the fixed cam plate 35 (see FIG. 5) on the peripheral surface of the cylinder.

The air cylinder mounting base 22 fixed to the ironing rod base 21 includes an arm 31 for mounting the air cylinder at the tip end portion. As shown in FIG. 4, a mounter 32 for the air cylinder 40 is swingably attached to the tip of the arm 31 of the air cylinder mounting base 22. The cylinder block 41 of the air cylinder 40 is attached to the mounter 32, and the tip of the output rod 42 that can appear and disappear in the air cylinder block 41 based on the air supply / discharge operation is the rotation shaft 23 of each ironing lever 24. It is rotatably connected at an intermediate position between the tip portion 28 and the tip portion 28. Since the surface on which the mounter 32 can swing is parallel to the rotating surface of the ironing lever 24, when the output rod 42 moves up and down with respect to the air cylinder block 41 during operation of the air cylinder 40, the output rod 41 and the output The rods 42 rotate with respect to the air cylinder mounting base 22 and the ironing lever 24, respectively, and the ironing lever 24 rotates around the rotating shaft 23 following the operation of the air cylinder 40.

Next, based on the description of FIGS. 5 and 6, the sealing / ironing operation of the sealing / ironing unit 1 shown as an embodiment in FIGS. 1 to 4 will be described. FIG. 5 is a process diagram illustrating a closing (squeezing) operation and an opening (squeezing release) operation of the ironing unit 10 in particular in the seal / ironing unit 1, and FIG. 6 shows a horizontal heater block 6 in the seal / ironing unit 1. It is a partial figure explaining the operation of the shutter 19 and the ironing rod 25. The operation of the bag-making filling and packaging machine will not be described again. Further, regarding the seal / ironing unit 1, units having substantially the same structure are arranged on both sides of the tubular packaging material Ft, and both units operate in synchronization with each other and cooperate with each other. Hereinafter, for the sake of simplicity, only the operation of the seal / ironing unit 1 on one side will be described. Further, regarding the operation of the seal / ironing unit 1, even if it is not shown by reference numerals in FIGS. 5 and 6, if it is a component shown in FIGS. 1 to 4, they will be referred to. I will explain it while doing it.

FIG. 5 shows the operations of the rotating shaft 23, the ironing lever 24, the ironing rod 25, the cam follower 30, the cam plate 35, and the air cylinder 40. The basic operation of the ironing unit 10 is as follows. The ironing lever 24, the ironing rod 25, and the cam follower 30 operate as an integral body. When the ironing unit base 11 moves forward, a force is transmitted to the shutter unit 14 via the coil springs 20 and 20. When the shutter 19 is closed in cooperation with the mating side, the lateral heater unit 2 advances while further compressing the coil springs 20 and 20, and sandwiches the tubular packaging material Ft between the lateral sealing surfaces 7 of the lateral heater block 6. When attached, a horizontal seal is applied to the tubular packaging material Ft. The shutter unit 14 operates integrally with the ironing rod unit 15 via the slide shafts 17 and 17. The ironing unit base 11 and the ironing rod unit 15 cannot approach each other beyond the distance defined by the stopper 26, and operate integrally when they are in contact with each other via the stopper 26. When the ironing lever 24 rotates around the rotation shaft 23 due to the cam action of the cam follower 30 and the cam plate 35, the ironing rod 25 moves substantially up and down. When the ironing lever 24 moves downward while being in contact with the tubular packaging material Ft, the ironing lever 24 performs an ironing operation with respect to the tubular packaging material Ft.

In FIG. 5 (1), the output rod 42 of the air cylinder 40 is retracted, and the ironing lever 24 shows the state of being most rotated counterclockwise of the rotating shaft 23. A cam follower 30 provided at the rear end portion 29 of the ironing lever 24 sits on the starting end position of the horizontal cam portion 36 of the fixed plate cam 35, and is hung between the tip portions 28 and 28 of the ironing lever 24. The ironing rod 25 is in a state of being lifted to the uppermost position, that is, the ironing rod 25 occupies the upper edge height position of the horizontal sealing surface 7 of the horizontal heater block 6.

The lateral heater unit 2 moves forward from the state shown in FIG. 5 (1), and the seal / ironing unit 1 moves to the position shown in FIG. 5 (2). At this position, the cam follower 30 rests on the terminal position of the horizontal cam portion 36 of the fixed plate cam 35. When the lateral heater unit 2 advances together with the ironing unit base 11, the advance of the unit base 11 is transmitted to the shutter unit 14 via the coil springs 20 and 20 in the compressed state to advance the shutter unit 14. At this stage, neither the horizontal heater unit 2 nor the shutter 19 is in contact with the tubular packaging material Ft. The ironing rod 25 occupies the highest position that can be taken continuously from the state shown in FIG. 5 (1), and in the state shown in FIG. 5 (2), it is in front of the lateral sealing surface 7 and of the shutter 19. It is located directly below.

When the lateral heater unit 2 further advances and the seal / ironing unit 1 moves from the position shown in FIG. 5 (2) toward the position shown in FIG. 5 (3), the cam follower 30 is a fixed plate cam 35 tilted cam. Ride on part 37 and climb. Along with this, the ironing lever 24 rotates clockwise in the figure around the rotation shaft 23 while advancing. The ironing rod 25 provided at the tip end portion 28 of the ironing lever 24 moves downward from the ironing start position shown in FIG. 5 (2) to the ironing end position shown in FIG. 5 (3). Based on the shape of the ironing lever 24, the ironing rod 25 moves from the upper ironing start position to the lower ironing end position sufficiently below the horizontal line passing through the rotation shaft 23, thereby forming a tubular shape. The squeezing operation is performed within the range including the planned horizontal seal portion of the packaging material Ft, and when there are small fragments of the product, such fragments are squeezed out from the planned horizontal seal portion and pushed into the lower bag. As a result, even if the horizontal seal surface 7 is pressed against the planned horizontal seal portion during the horizontal seal, the horizontal seal surface 7 that cooperates with the other side does not bite the debris. Regarding the ironing rod 25, the ironing start position is the upper limit of the planned horizontal sealing area or a position above it, and the ironing of the tubular packaging material is started, and the ironing end position is the planned horizontal sealing. It is a position below the lower limit of the region, which is a position where the ironing of the tubular packaging material is completed and the separation of the ironing rod from the tubular packaging material is started.

At the position shown in FIG. 5 (3), the shutter 19 abuts on the tubular packaging material Ft and is closed, but the lateral sealing surface 7 of the lateral heater unit 2 is not closed, and the lateral sealing surface 7 and the tubular packaging are closed. A gap through which the ironing rod 25 can pass is left between the material Ft and the material Ft. Since the shutter 19 cooperates with the other side to sandwich the tubular packaging material Ft from the outside, even if the product is subsequently loaded from above through the filling cylinder, the product is tubularly packaged above the closed shutter 19. It is received in the material Ft and does not descend to the inner surface of the lateral sealing region of the tubular packaging material Ft. Only the tubular packaging material Ft having a narrow vertical width range G remains between the shutter 19 and the ironing rod 25 (FIG. 6 (1)). 6 (1), the ironing as part of the ironing path rod 25 to follow, are column positions shown that ironing rod 25 takes according to the time elapsed. Ironing rod 25, in following the ironing path, Ru transected anterior horizontal sealing surface of the horizontal heater unit 2 vertically downward. Therefore, fine debris itself be confined with the range G hardly caused the product, even if debris was sometimes confined to a range G, it is possible to reduce the amount as much as possible. Since the output rod 42 of the air cylinder 40 is connected to the ironing lever 24, the output rod 42 advances from the cylinder block 41 as the ironing lever 24 rotates, but air supply / discharge is free. By doing so, the air cylinder 40 does not become a resistance to the rotational operation of the ironing lever 24.

In the state shown in FIG. 5 (3) (a state in which the cam follower 30 climbs up the inclined cam portion 37 of the cam plate 35, the ironing rod 25 is at the lowermost ironing end position, and the shutter 19 is closed), the lateral heater unit. 2 is further driven forward. The shutter unit 14 and the ironing rod unit 15 connected via the slide shafts 17 and 17 cannot move forward, but the lateral heater unit 2 and the ironing unit base 11 further compress the coil springs 20 and 20 to the amount of compression. It is possible to move forward while being guided by the slide shafts 17 and 17 by a corresponding distance. Therefore, until FIG. 5 (4) showing the start of the opening operation, while the shutter 19 is closed and the ironing rod 25 is in the ironing end position where the ironing rod 25 is lowered downward, the lateral heater unit 2 advances and the lateral sealing surface 7 Is pressed against the area where the squeezing operation of the tubular packaging material Ft is performed, and a horizontal seal is applied to the planned horizontal sealing portion of the tubular packaging material Ft (FIG. 6 (2)).

The ironing unit 10 maintains a state in which the output rod 42 is advanced by the operation of the air cylinder 40, the ironing rod 25 is kept lowered to the lowermost ironing end position, and the cam follower 30 is separated from the fixed cam plate 35. As it is, the retreat is started from the state shown in FIG. 5 (4). Even if the ironing unit base 11 starts to retreat together with the lateral heater unit 2, the shutter 19 is initially urged forward by the action of the restoring force of the coil springs 20 and 20, so that it initially contacts the tubular packaging material Ft. Maintain the state. Further, the ironing rod unit 15 does not immediately start retreating, and the ironing rod 25 maintains a state of being lowered to the ironing end position.

The horizontal heater unit 2 in which the tubular packaging material Ft is laterally sealed moves backward and separates from the tubular packaging material Ft. At this time, the ironing rod 25 has not yet started to retreat, and occupies the ironing end position close to directly below the laterally sealed portion of the tubular packaging material Ft. Since the lateral heater block 6 is hot and hot for sealing, there is a possibility that the laterally sealed portion of the bag B formed from the tubular packaging material Ft is melted and adhered. In this case, the ironing rod 25 that has not yet retracted comes into contact with the bag B that adheres to the lateral heater block 6 and tries to retract together, and when the lateral heater unit 2 further retracts, the bag B is moved to the lateral heater unit 2 It acts to peel off from. In this way, the ironing rod 25 also has a function of peeling the bag B from the horizontal heater unit 2 and preventing the bag B from moving in connection with the horizontal heater block 6 (FIG. 6 (3)).

When the ironing unit base 11 approaches the ironing rod base 21 of the ironing rod unit 15 via the stopper 26 as the lateral heater unit 2 retracts, the ironing unit base 11, the slide shafts 17, 17 and the shutter The unit 14 also starts retreating together with the lateral heater unit 2. The middle of the retreat is shown in FIG. 5 (5). The squeezing unit 10 at the time of retreat retreats in the state shown in FIG. 5 (4). The ironing rod 25 does not immediately return to the upper ironing start position, but retreats horizontally while being lowered to the ironing end position like the lower shutter of the conventional structure (FIG. 6 (4)).

The ironing unit 10 retreats to the end position of the opening operation shown in FIG. 5 (6) through FIG. 5 (5) while maintaining the state shown in FIG. 5 (4). The return operation start time when the ironing lever 24 and the ironing rod 25 return from the end of the opening operation shown in FIG. 5 (6) to the initial position shown in FIG. 5 (1), that is, to the start position of the next closing operation is It is said that the ironing unit 10 reaches the final position of the opening operation, which is the final position of the ironing cycle. The return operation of the ironing lever 24 and the ironing rod 25 is started after the lateral heater unit 2 is opened, the ironing rod 25 is retracted first like the operation performed by the conventional lower shutter, and the ironing unit 10 is retracted. ..

Specifically, when the ironing unit 10 reaches the end position of the opening operation, the air cylinder 40 operates and the output rod 42 retracts, and the ironing lever 24 is fixed to the cam follower 30 provided at the rear end. Rotates around the rotation shaft 23 (counterclockwise in the figure) until it rides on the starting end position of the horizontal cam portion 36 of the plate cam 35, and is hung between the tips of the ironing lever 24. The rod 25 rises immediately before the retracted horizontal seal surface 7 and is lifted to the top, and returns to the position shown in FIG. 5 (1) of the closing operation. Therefore, it is surely avoided that the ironing rod 25 that performs the return operation and the tubular packaging material Ft that descends below the filling cylinder and between the seal / ironing units 1 and 1 for the bag to be manufactured next interfere with each other. Can be done (Fig. 6 (5)). 6 (5), and as part of the return path Gokibo 25 to follow, it is shown a column position to take when moving forward of the lateral heater block in accordance with the temporal course. And Gokibo 25, once retracted in a direction away from the tubular packaging material Ft from squeezing the end position, then Ru transected anterior horizontal sealing surface of the horizontal heater unit 2 vertically upward.

Although examples of the present invention have been described above based on the description in the drawings, various modifications can be made without departing from the spirit of the present invention.
As for the means for operating the ironing rod, a cam is used for going and a cylinder is used for returning, but the means is not limited to the combination of this method and is arbitrary. For example, the return operation of the ironing lever 24 and the ironing rod 25 may be started earlier if there is no interference with others, as long as it is later than the time when the ironing unit 10 starts to retreat. .. The return operation start time can be easily set by operating the air cylinder 40, which makes the schedule design of the operation timing flexible. Further, the ironing unit base 11 and the ironing rod base can be slid by a slide structure other than the slide shaft 17, and the urging means for the shutter unit 14 can be a spring structure other than the coil spring 20. ..

1 Seal / ironing unit 2 Horizontal heater unit 3 Horizontal heater block base 4 Front surface 5 Top surface 6 Horizontal heater block 7 Horizontal seal surface 10 Ironing unit 11 Ironing unit base 11a, 11a Bearing holes 11b, 11b Loading holes 11c, 11c Mounting holes 12 Top surface 13 Front (rear)
14 Shutter unit 15 Iron rod unit 16, 16 Slide bearing 17, 17 Slide shaft 17a Front end 17b Rear end 18 Shutter base plate 19 Shutter 20, 20 Coil spring 21 Iron rod base 22 Air cylinder mounting base 23 Rotating shaft 24, 24 Ironing lever 25 Ironing rod 26 Stopper 27 Long plate-shaped part 28 Tip part 29 Rear end part 30, 30 Cam follower 31 Arm 32 Mounter 35 Fixed cam plate 36 Horizontal cam part 37 Tilted cam part 40 Air cylinder 41 Cylinder block 42 Output rod 50 Vertical bag making filling and packaging machine 51 Former 52 Product filling cylinder 53 Vertical sealing device 54 Horizontal sealing unit 54a, 54b Horizontal sealing part 55 Feed belt device 56 Cutter 57 Cutter groove 58, 58 Ironing arm 59 Ironing bar Fw Web-like packaging material Ft Cylindrical packaging material S Product B Bag Bp Bag Package W Horizontal seal length H Horizontal seal width G Range

Claims (8)

The horizontal seal is applied to a vertical bag packaging machine having a horizontal seal surface for applying a horizontal seal to a tubular packaging material and equipped with a horizontal heater unit that forms a bag for packaging products by the horizontal seal. Therefore, when the horizontal heater unit operates in conjunction with the operation of approaching and separating from the tubular packaging material and the horizontal heater unit is separated from the tubular packaging material, the product. Is a squeezing device that squeezes in a range including the planned horizontal sealing area of the tubular packaging material, which is filled through the inside.
It is equipped with a squeeze unit having a squeeze rod that follows the squeeze path according to the cam follower following the cam surface of the fixed cam plate during the forward operation of the squeeze operation and follows the return path during the recovery operation of the squeeze operation. ,
The operation of the horizontal heater unit approaching / separating from the tubular packaging material is an operation of advancing / retreating from the side to approach / separating from the tubular packaging material.
The ironing rod of the ironing unit, in following the prior SL ironing said return path as has respectively Tsu transected anterior of the lateral sealing surfaces of the horizontal heater unit in the vertical direction,
In the ironing unit, the ironing rod has the tubular shape at the ironing start position when following the first half of the ironing path before the lateral heater unit comes into contact with the tubular packaging material for applying the lateral seal. the ironing operation to the transverse sealing region where while moving downward while in contact with the said transverse sealing region for the tubular packaging material while traversing the second half of the ironing path with contacts the packaging material and the ironing bars, wherein the transverse heater unit subjected to transverse seal begins to follow the smell Te before Symbol return path after spaced from the tubular packaging material, the hands before Symbol cam follower at the commencement of the tracing of the return path is the retracted in a direction away from the said tubular packaging material from the state was clerical error end position away from the cam surface of the cam plate, then longitudinally forward of said transverse sealing surface in tracing the return path An ironing device in a vertical bag wrapping machine characterized by crossing upwards. The ironing unit includes a steel rod base that operates in conjunction with an operation in which the horizontal heater unit approaches and separates from the tubular packaging material, and a rotating shaft that is parallel to the ironing rod with respect to the ironing rod base. Equipped with a squeezing lever that can rotate around
The ironing lever has the ironing rod at the tip portion and the cam follower at the rear end portion.
When the ironing unit advances toward the tubular packaging material, the cam follower follows the cam surface of the cam plate, so that the ironing rod follows the ironing path and the ironing lever follows the cam surface. The ironing device for a vertical bag packaging machine according to claim 1, wherein the ironing rod follows the latter half of the ironing path and performs the ironing operation as it rotates around a rotation axis. The ironing unit includes an air cylinder that connects the ironing lever to the ironing rod base, and the air cylinder operates at an arbitrary timing when the ironing rod follows the return path. The vertical according to claim 2, wherein the ironing lever is rotated so that the ironing rod is lifted and the cam follower abuts on the cam surface of the cam plate to return to the initial position of the ironing path. Ironing device in a mold bag packaging machine. The air cylinder is characterized in that it operates when the ironing rod finishes retracting in the direction away from the tubular packaging material in response to the operation of the lateral heater unit separating from the tubular packaging material. The ironing device in the vertical bag packaging machine according to claim 3. A spring and a stopper for regulating the distance when approaching each other are provided between the lateral heater unit and the ironing unit.
When the horizontal heater unit makes an operation of approaching the tubular packaging material, the ironing unit is made to perform the ironing operation via the spring, the lateral seal is applied, and then the tubular packaging material is subjected to the ironing operation. The ironing unit is characterized in that the ironing end position is maintained by the action of the restoring force of the spring until the lateral heater unit comes into contact with the ironing unit via the stopper when the lateral heater unit is separated from the ironing unit. The ironing device in the vertical bag packaging machine according to any one of claims 2 to 4. The vertical bag wrapping machine operates together with the ironing unit in conjunction with an operation in which the horizontal heater unit approaches and separates from the tubular wrapping material, and the tubular wrapping material is pressed from the planned horizontal sealing area. Also equipped with a shutter that is sandwiched at an upper position to receive the product in the tubular packaging material.
The vertical according to any one of claims 1 to 5, characterized in that the distance between the ironing rod and the shutter sandwiching the tubular packaging material is set as narrow as possible. Ironing device in mold bag packaging machine. The vertical bag wrapping machine operates together with the ironing unit in conjunction with an operation in which the horizontal heater unit approaches and separates from the tubular wrapping material, and the tubular wrapping material is pressed from the planned horizontal sealing area. Also equipped with a shutter that is sandwiched at an upper position to receive the product in the tubular packaging material.
The distance between the ironing rod and the shutter sandwiching the tubular packaging material is set as narrow as possible.
The fifth aspect of claim 5, wherein the spring is provided between the lateral heater unit and the shutter in a compressed state, and the restoring force of the spring acts on the ironing unit via the shutter. Ironing device in the vertical bag packaging machine. The vertical bag wrapping machine is arranged inside the tubular wrapping material and is loaded with the product to be packaged, and the tubular wrapping material is placed in the vertical direction along the outer peripheral surface of the filling cylinder. The ironing device in the vertical bag packaging machine according to any one of claims 1 to 7, wherein the vertical bag-making filling and packaging machine is provided with a feeding mechanism for feeding in the vertical direction along the line.

Images