JP7070878B2 - Bag making filling and packaging machine with belt clearance setting function - Google Patents

Description

According to the present invention, in a bag-making filling / packaging machine, particularly a vertical bag-making filling / packaging machine, a filling cylinder in which a product to be packaged is loaded through the inside of the cylinder and a tubular packaging material is sent and guided while surrounding the circumference. The present invention relates to a bag-making filling / packaging machine having a gap setting function for setting a gap with a packaging material feed belt arranged on the side of the filling cylinder.

Conventionally, as a bag-making filling / packaging machine, for example, a vertical bag-making filling / packaging machine disclosed in Patent Document 1 and as outlined in FIG. 4, which is a perspective view, is often used. In the vertical bag-making filling and packaging machine 50 shown in FIG. 4, the strip-shaped packaging material Fw unwound from the film roll Fr includes a dancer roller 60, an adjusting roller 61, a first roller 62, and a guide roller 63 placed in place. After that, it is sent to the former 51. In particular, the first roller 62 is a strip-shaped packaging material guiding device that determines the feeding posture of the strip-shaped packaging material Fw with respect to the former 51. The strip-shaped packaging material Fw is bent into a substantially cylindrical shape by the former 51 so that the side end edge portions fe and fe are overlapped in a palm-shaped manner, and while traveling in the longitudinal (vertical or vertical) direction, both side edge portions. The vertical sealing portion Sc is applied to the fe and fe by the vertical sealing device 54, so that the fe and fe are formed into a tubular packaging material Ft.

The product S, which is a package, is put into the inside of the tubular packaging material Ft from the hopper 52 through a filling cylinder (usually a cylinder, a cylinder such as a square cylinder in a special case) 53. The filling cylinder 53 is formed in a cylinder having a cylinder inner surface into which the product S from the hopper 52 is continuously charged and a cylinder peripheral surface which is an outer cylindrical surface. The filling cylinder 53 is arranged to penetrate the former 51 with a predetermined gap between the cylinder peripheral surface and the former. On the left and right sides of the outer periphery of the filling cylinder 53, packaging material feeding devices 56, 56, which are composed of a suction type belt mechanism and which sandwich and feed the tubular packaging material Ft, are arranged. The strip-shaped packaging material Fw formed by the former 51 passes through the gap between the former 51 and the filling cylinder 53, and the tubular packaging material Ft formed from the strip-shaped packaging material Fw passes through the peripheral surface of the filling cylinder 53. Paper is fed by the packaging material feeding devices 56 and 56 while being surrounded inside. The horizontal sealing device 55 sandwiches the tubular packaging material Ft from the outside to apply the horizontal sealing to the tubular packaging material Ft, whereby a bag packaging body Bp formed in advance and in which the product S is packaged is manufactured. At the same time, a horizontal seal portion Se on the bottom side of the bag B into which the product S is loaded is formed.

The horizontal seal device 55 is arranged further below the lower end of the filling cylinder 53 with the tubular packaging material Ft interposed therebetween, and includes horizontal seal blocks 55a and 55b that operate to approach and separate from each other. The horizontal seal blocks 55a and 55b have an upper horizontal sealer portion that sandwiches the tubular packaging material Ft in a direction crossing from the outside when approaching to form a bottom lateral seal portion Se for the bag B, and a bag package. It constitutes a lower lateral sealer portion that forms a lateral seal portion Se on the top side of Bp. The bag package Bp is manufactured by putting the product S inside the tubular packaging material Ft and applying the horizontal sealing portion Se in the transverse direction by the horizontal sealing device 55.

The horizontal sealing device 55 can further include a cutter device 59 that cuts through the tubular packaging material Ft. In the cutter device 59, a cutter blade 59a is disposed between the upper and lower lateral sealer portions of one lateral seal block 55a, and the other lateral seal block 55b has a groove 59b into which the cutter blade 59a can enter. It is formed. When both lateral seal blocks 55a and 55b approach each other and sandwich the packaging material, the tubular packaging material Ft is welded in the transverse direction to form the lateral sealing portion Se, and at the same time, the cutter blade 59a is driven in the advancing direction to form a tubular shape. Cut through the packaging material Ft. At the lower end of the filling cylinder 53, a pair of tension guides for tensioning the tubular packaging material Ft outward in the bag width direction are provided so as to extend diagonally downward.

In the vertical bag-making filling and packaging machine 50, the vertical sealing device 54 includes a pair of openable and closable vertical sealing blocks 54a and 54b extending in an elongated direction along the extending directions of both side edge portions fe and fe of the strip-shaped packaging material Fw. ing. The vertical seal blocks 54a and 54b are heat-sealed to form the vertical seal portion Sc when sandwiching the both side edge portions fe and fe that are in the overlapped state during the closing operation, and the opening operation is performed. Allows both side edge portions fe and fe to pass through the gap created between the vertical seal blocks 54a and 54b by the operation.

In the vertical bag-making filling and packaging machine 50, the packaging material is intermittently fed according to the packaging operation. A vertical sealing device during a short period of time when the product S is put into the tubular packaging material Ft and the feeding of the curved packaging material in which the strip-shaped packaging material Fw and its both side edge portions fe and fe are brought close to each other is stopped. 54 sandwiches both side edge portions fe and fe to form a vertical seal portion Sc, and the horizontal seal device 55 forms a horizontal seal portion Se to manufacture a bag package Bp. By configuring the vertical sealing device 54 and the horizontal sealing device 55 so that they can operate in a box motion, it is possible to increase the speed of feeding the packaging material.

In the bag-making filling / packaging machine having the above-described form, the former 51, the hopper 52, and the filling cylinder 53 are collectively attached to the main body frame of the vertical bag-making filling / packaging machine as a cylinder-making unit. That is, the cylinder making unit for molding the strip-shaped packaging material Fw into the tubular packaging material Ft is a fima 51 that curves the strip-shaped packaging material Fw into a substantially cylindrical shape, a hopper 52 for loading the product S, and a product at the lower end of the hopper 52. A unit is a filling cylinder 53 that is connected so as to be a continuous input path for S and is arranged through a predetermined gap between the former and the peripheral surface of the cylinder so that the packaging material can pass through. It is a product.

The packaging material feeding device 56 provided on both the left and right sides of the filling cylinder 53 includes an endless packaging material feeding belt 58 that circulates and travels. The tubular packaging material Ft is fed by the frictional force when the packaging material feed belt 58 travels while sandwiching the tubular packaging material Ft between the filling cylinder 53 and the filling cylinder 53. The packaging material feed belt 58 can be formed with suction holes 58a arranged in at least one row in the longitudinal direction of the belt. The side surface portion of the filling cylinder 53 facing the packaging material feed belt 58 via the tubular packaging material Ft is formed as a vertically elongated flat surface. In the case of the packaging material feed belt 58 with the suction hole 58a, a negative pressure device such as the suction box 57 is arranged along the inside of the packaging material feed belt, and the negative pressure is applied to the tubular packaging material Ft through the suction hole 58a. The tubular packaging material Ft is sucked by the packaging material feeding belt 58 and sent out to the tip end side of the filling cylinder 53.

In such packaging material feeding devices 56, 56, when the packaging material feeding belt 58 is in direct contact with the side surface portion of the filling cylinder 53, the tubular packaging material Ft is the side surface of the packaging material feeding belt 58 and the filling cylinder 53. It is in a state of being strongly sandwiched between the parts and the tubular packaging material Ft, and strong frictional resistance is generated in the feeding of the tubular packaging material Ft, so that smooth feeding of the packaging material cannot be obtained. Further, if the gap between the packaging material feed belt 58 and the side surface portion of the filling cylinder 53 is too wide, the tubular packaging material Ft is sucked by the packaging material feed belt 58 and floats from the side surface portion of the filling cylinder 53. In this state, the feeding of the tubular packaging material Ft is not stable, which causes meandering and wrinkles. Therefore, it is preferable that there is a slight but appropriate gap between the packaging material feed belt 58 and the side surface portion of the filling cylinder 53 in consideration of the thickness of the packaging material.

By the way, when the product (item) to be packaged is changed, the packaging specifications such as the thickness and width size required for the bag and the sealing barrier property are usually different. Therefore, the packaging material used for packaging is also different. The type (material) and width dimensions will be different. Since the former and filling cylinder will be different according to the change of the packaging material, it is necessary to prepare the cylinder making unit corresponding to the item as the cylinder making unit to be assembled to the packaging machine. On the other hand, for the main body of the packaging machine other than the cylinder making unit, various devices provided in the main body, that is, vertical sealing device, horizontal sealing device, packaging material feeding device, strip-shaped packaging material guiding device to the cylinder making unit, and the like. Has some flexibility that it can be used for different cylinder-making units by mechanically adjusting the mounting position or adjusting the timing and operating range in the packaging operation by software. That is, for these various devices on the packaging machine main body side, there is a possibility that there are a plurality of cylinder-making units that can be adapted by adjusting mechanically or by software while using the same device. Therefore, it is necessary to select and attach a cylinder-making unit that correctly corresponds to the packaging specifications used for actual packaging from a plurality of compatible cylinder-making units to the main body of the packaging machine.

Therefore, in a bag-making filling and packaging machine, in general, it is easy to surround and release the packaging material around the filling cylinder at the start and end of the packaging operation, and the packaging material is surrounded during maintenance. As shown in Fig. 5, the left and right packaging material feeders The mounting position with respect to the main body of the packaging machine can be changed. That is, the main body plate 3 on the main body side of the packaging machine to which the cylinder making unit is attached hangs down as guide frames 3a and 3a at the left and right ends thereof, respectively, and the left and right packaging materials are placed between the guide frames. Two guide shafts 2 and 2 for guiding the feeding devices 56 and 56 are hung so as to extend in the left-right direction and parallel to each other at two different height positions. The left and right packaging material feeding devices 56 and 56 are unitized, and are guided by two guide shafts 2 and 2 so as to be able to approach and separate from the filling cylinder while maintaining the posture.

In order to secure an appropriate gap between each packaging material feeding device 56 and the side surface portion of the filling cylinder 53, the stopper mechanism 70 for positioning the packaging material feeding device 56 with respect to the packaging machine body adjusts the position on the packaging machine body side. It is possible to provide a contact portion 74 that abuts on the stopper mechanism on the packaging material feeding device 56 side. As an example, the stopper mechanism 70 has a female screw body 71 fixed to the main body plate 3 of the packaging machine and functions in the form of a fixing nut, and the stopper screw 72 which is a stopper member is screwed into the female screw body 71. .. By changing the screwing amount of the stopper screw 72, the position of the screw head can be adjusted as the stopper position where the packaging material feeding device 56, which is moved toward the filling cylinder 53, abuts at the contact portion 74 and stops. It is said that. A set screw 73 as a fixing member is screwed into the female screw body 71 in a direction orthogonal to the screw axis of the stopper screw 72, and the set screw 73 abuts or engages with the stopper screw 72 with respect to the female screw body 72 of the stopper screw 72. The position is fixed.

According to the stopper mechanism 70, when the cylinder making unit is attached to the main body plate 3, the packaging material feeding devices 56 and 56 are moved along the guide shafts 2 and 2 according to the size of the cylinder making unit. Then, the product is temporarily stopped at a predetermined front position shown in FIG. At this time, there is a gap A between the contact portion 74 of each packaging material feeding device 56 and the stopper screw 72, and a gap B between the packaging material feeding belt and the side surface portion of the filling cylinder provided in the cylinder making unit. Is a gap in which a slight gap for suction and feed running is added to the gap A. After that, each packaging material feeding device 56 is further moved along the guide shafts 2 and 2, and the contact portion 74 is brought into contact with the stopper member (stopper screw 72) on the packaging machine main body side (gap A shown in FIG. 5). Is zero), and the gap B between the surface of the packaging material feed belt 58 and the side surface portion of the filling cylinder 53 provided in the cylinder manufacturing unit is set as an appropriate gap for feeding the packaging material. In this way, the gap B between the surface of the packaging material feed belt 58 and the side surface portion of the filling cylinder 53 facing the surface thereof becomes a gap obtained by adding a predetermined value (appropriate gap at the time of setting) to the gap A. In addition, the mounting position of the stopper member (stopper screw 72) with respect to the packaging machine main body (main body plate 3) is adjusted.

However, in the method of adjusting the gap by this stopper mechanism, the position of the stopper member (stopper screw 72) for the stopper mechanism 70 for each of the left and right packaging material feeding devices 56 must be adjusted for each cylinder making unit, which is a lot of trouble. Needs. Further, the packaging material feeding device 56 itself also has a slight assembly error for each assembled device, and the position adjustment of the stopper member is not exactly the same on the left and right, and the cylinder making unit is used as the main body of another packaging machine. It is necessary to adjust the position of the stopper member each time when it is diverted to. Further, when the packaging material feeding belt 58 of the packaging material feeding device 56 is worn, the gap between the packaging material feeding device 56 and the filling cylinder 53 becomes large, the suction action is reduced, and the packaging material feeding failure is caused. Therefore, it is necessary to diligently inspect the gap between the packaging material feeding belt 58 of the packaging material feeding device 56 and the side surface of the filling cylinder 53, and readjust the gap if necessary.

In relation to the packaging material feeding device arranged on the side of the filling cylinder, Patent Document 1 states that the suction type packaging material feeding belt (pull-down belt) is close to the surface of the filling cylinder (former tube) from the origin position. A position suitable for transferring the packaging material by the learning effect by storing the movement amount until the movement in the storage means and controlling the drive motor based on this storage value and the movement measurement value of the packaging material feed belt. It has been proposed to position the packaging material feed belt. In order to control the positioning of the packaging material feed belt, the control device is a motor control means that controls the operation and stop of the belt displacement drive motor, and a collation means or a storage means that matches the count number corresponding to the movement amount of the belt from the origin position. The counting means to output to, the storage means for storing the former data from the external input means and the count number from the counting means, the count number to the corresponding former stored in the storage means, and the count number by the counting means are collated. Then, in order to stop the drive motor by the matching signal, a collation means for outputting this signal to the motor control means is provided.

Similarly, in relation to the packaging material feeding device, Patent Document 2 detects the displacement of the suction type packaging material feeding belt (pull-down belt) attached to the tip of the belt support frame via the parallel quadrilateral link by the limit switch. , A positioning device has been proposed in which the packaging material feed belt is slightly separated from the packaging material by the detection signal to reduce the contact pressure with the packaging material as much as possible. A step motor is used as a means for moving the packaging material feed belt between the origin position and the filling cylinder, and as a means for slightly separating the packaging material feed belt.

All of the techniques for positioning the suction type packaging material feed belt for the filling cylinder disclosed in these patent documents utilize the rotational output of the motor, and for that purpose, the control device uses various input means and detection means. The output of the motor is controlled based on the data of. Therefore, the configuration for realizing such a function is complicated and costly, and therefore, it cannot be said that the usability is simple.

Japanese Unexamined Patent Publication No. 10-101010 Japanese Unexamined Patent Publication No. 10-101008

Therefore, the product is provided with a filling cylinder in which the product to be packaged is loaded through the inside of the cylinder and the tubular packaging material is fed and guided in a state of surrounding the periphery, and a packaging material feeding device arranged on the side of the filling cylinder. In the bag filling and packaging machine, the gap between the side surface of the filling cylinder and the packaging material feeding belt of the packaging material feeding device is set by retracting the packaging material feeding belt in contact with the filling cylinder by a distance corresponding to an appropriate gap. There is a problem to be solved in that the gap setting function can be obtained with a simple structure and the setting operation of the gap setting function can be simple and reliable.

An object of the present invention is to solve the above-mentioned problems, and in a bag-making filling and packaging machine including a filling cylinder and a packaging material feeding device arranged on the side thereof, a side surface of the filling cylinder and a packaging material feeding device are used. It is an object of the present invention to provide a bag-making filling and packaging machine having a belt gap setting function, which has a mechanically simple structure and can be manufactured at a low cost when setting a gap for setting a gap between the packaging material feed belt. ..

In order to solve the above problems, the bag-making filling and packaging machine provided with the belt gap setting function according to the present invention is
A filling cylinder that guides the product to be packaged through the inside of the cylinder and the tubular packaging material to be sent in a surrounding state.
A feed belt is provided which is arranged on the side of the filling cylinder and in which the tubular packaging material is placed in a gap formed between the filling cylinder and the filling cylinder. A packaging material feeding device that feeds packaging material along the filling cylinder,
A guide shaft extending in a manner of guiding the packaging material feeding device in an approaching or retracting direction with respect to the filling cylinder, and a guide shaft.
An advancing / retreating driving means for driving the packaging material feeding device to advance / retreat along the guide shaft ,
A clamp unit that is guided by the guide shaft so as to follow the packaging material feeding device and enables the guide shaft to be clamped.
With a stopper mechanism that limits the relative movement amount of the packaging material feeding device and the clamp unit in the direction along the guide shaft to the gap.
Equipped with
The clamp unit is arranged on the side far from the filling cylinder with respect to the packaging material feeding device.
The stopper mechanism includes a rod extending from the packaging material feeding device in the retracting direction and penetrating the clamp unit, and a stopper attached to the tip of the rod penetrating the clamp unit and capable of contacting the clamp unit. And equipped with
The clamp unit can move relative to the packaging material feeding device by a distance corresponding to the gap between the first state of contact with the stopper and the second state of contact with the packaging material feeding device. It consists of things.

According to the bag-making filling and packaging machine equipped with this belt clearance setting function, the packaging material feeding device and the clamp unit are guided by the guide shaft by the operation of the advancing / retreating driving means, and the feeding belt of the packaging material feeding device is cylindrical. It is pressed against the filling cylinder through the packaging material. At this time, the clamp unit is moved following the packaging material feeding device while being guided by the guide shaft, and an appropriate gap to be generated between the feeding belt and the filling cylinder between the packaging material feeding device and the clamp unit. There is a gap corresponding to. In this state, the clamp driving means of the clamp unit operates to clamp the guide shaft, so that the clamp unit cannot move along the guide shaft. Next, by the operation of the advancing / retreating drive mechanism, the packaging material feeding device is moved in a direction away from the filling cylinder, and the gap generated between the packaging material feeding device and the clamp unit is absorbed. The packaging material feeding device abuts on the clamp unit to prevent further movement. As a result, the packaging material feeding device is moved forward toward the filling cylinder until the feed belt is brought into contact with the filling cylinder and the gap becomes zero, and then the packaging material feeding device and the clamp unit are moved away from the filling cylinder. Since the back movement is performed until the gap between the two is absorbed, an appropriate gap is secured between the feed belt and the filling cylinder when the back movement of the packaging material feeding device is completed. Even if the feed belt is worn, the packaging material feeding device, together with the clamp unit, moves forward toward the filling cylinder including the weared portion, abuts on the filling cylinder, and then retracts until the gap is absorbed. By moving, a predetermined proper gap is always obtained between the feed belt and the filling cylinder.

In the bag-making filling and packaging machine provided with the belt clearance setting function, the clamp unit is arranged on the side far from the filling cylinder with respect to the packaging material feeding device, and the stopper mechanism is the packaging material feeding device. The clamp unit is provided with a rod that extends in the receding direction thereof and penetrates the clamp unit, and a stopper that is attached to the tip of the rod that penetrates the clamp unit and can come into contact with the clamp unit. The packaging material feeding device is relatively movable by a distance corresponding to the gap between the first state of contact with the stopper and the second state of contact with the packaging material feeding device. It is . Since the clamp unit is arranged on the side far from the filling cylinder with respect to the packaging material feeding device, the stopper mechanism provided in relation to the clamp unit can be easily visually recognized from the outside. Further, the stopper mechanism includes a rod penetrating the clamp unit and a stopper attached to the penetrating tip of the rod, and the relative movement amount of the clamp unit and the packaging material feeding device is endless with the filling cylinder. Since the amount is limited to the amount corresponding to the gap to be formed between the feed belt and the feed belt, the structure and function are sufficiently simplified.

In the bag-making filling and packaging machine provided with the belt clearance setting function, the clamp unit is driven forward and backward in the first state in contact with the stopper when the clamp unit does not clamp the guide shaft. The second state is in contact with the clamp unit when the clamp unit clamps the guide shaft. Therefore, it can be said that an appropriate gap is formed between the packing cylinder and the filling cylinder.
If the clamp unit does not clamp the guide shaft and is in a freely movable state, when the packaging material feeder is moved toward the filling cylinder, the clamp unit is packaged in the first state in contact with the stopper. It follows the material feed device (and therefore moves toward the filling tube). When the feed belt of the packaging material feeding device comes into contact with the filling cylinder through the tubular packaging material, the clamp unit becomes immovable by clamping the guide shaft, but after that, the packaging material feeding device is moved from the filling cylinder. In the second state of retracting and abutting on the clamp unit, an appropriate gap is formed between the feed belt of the packaging material feeding device and the filling cylinder.

In the bag-making filling and packaging machine provided with the belt clearance setting function, the rod is a bolt, the stopper is a nut screwed into the bolt, and the clamp is obtained by changing the screwing amount of the nut into the bolt. By changing the relative movement amount between the unit and the packaging material feeding device, it can be said that the size of the gap between the filling cylinder and the packaging material feeding belt can be adjusted.
By changing the screwing amount of the nut as a stopper attached to the tip of the bolt as a rod into the bolt, the packaging material feeding device in which the feed belt comes into contact with the filling cylinder via the tubular packaging material is retracted from the filling cylinder. The relative movement amount until the second state in which the packaging material feeding device comes into contact with the clamp unit that clamps the guide shaft can be changed, and therefore the size of the gap between the filling cylinder and the packaging material feeding belt is large. Can be adjusted.

In the bag-making filling and packaging machine equipped with this belt clearance setting function, a spring is arranged between the packaging material feeding device and the clamp unit to urge the packaging material feeding device and the clamp unit in a direction that always separates them. When the clamp unit urged by the spring is in the first state of contact with the stopper, the clamp unit can move following the packaging material feeding device. ..
The packaging material feeding device and the clamp unit are always urged in a direction away from each other by a spring arranged between them, and the clamp unit is in the first state of contacting the stopper by this spring urging. Then, when the packaging material feeding device is driven forward with respect to the filling cylinder along the guide shaft, the clamp unit can be moved following the packaging material feeding device.

In the bag-making filling and packaging machine provided with the belt clearance setting function, the packaging material feeding device, the advancing / retreating drive mechanism, the clamp unit, and the stopper mechanism are arranged in a pair symmetrically with respect to the filling cylinder. Can be.
By arranging the packaging material feeding device on the left and right with respect to the filling cylinder, the feeding of the tubular packaging material is well-balanced on the left and right, and it is possible to suppress meandering and wrinkling in the feeding of the tubular packaging material. Can be done.

In the bag-making filling and packaging machine equipped with this belt gap setting function, the bag-making filling and packaging machine is a former in which the strip-shaped packaging material is bent into a substantially tubular shape and the filling cylinder is arranged through the bent. A vertical sealing device that applies a vertical seal to the side edge portion of the strip-shaped packaging material in order to form the strip-shaped packaging material into the tubular packaging material, a horizontal sealing device that applies a horizontal seal in the transverse direction to the tubular packaging material, and a horizontal sealing device. The band-shaped packaging material guiding device for guiding the feeding of the strip-shaped packaging material to the cylinder-making unit is further provided, and the product is put into the bag formed in advance while forming a bag from the tubular packaging material. It can be said that it is a vertical bag-making filling and packaging machine that continuously manufactures the finished bag-packaging body. That is, in the vertical bag-making filling and packaging machine, an appropriate gap can always be maintained between the filling cylinder and the packaging material feed belt.

Since the bag-making filling and packaging machine provided with the belt clearance setting function according to the present invention is configured as described above, the packaging material feeding device and the clamp unit following the packaging material feeding device are guided to the guide shaft by the operation of the advancing / retreating drive mechanism. While moving forward toward the filling cylinder, the feed belt of the packaging material feeding device is pressed against the filling cylinder via the tubular packaging material. At this time, a gap corresponding to an appropriate gap to be generated between the feed belt and the filling cylinder is formed between the packaging material feeding device and the clamp unit. In this state, by operating the clamp driving means of the clamp unit to clamp the guide shaft, the clamp unit becomes immovable along the guide shaft. Next, when the packaging material feeding device is moved backward in the direction away from the filling cylinder, the packaging material feeding device absorbs the gap generated between the packaging material feeding device and the clamp unit and abuts on the clamp unit, so that the packaging material feeding device is further retracted. Cannot be moved. That is, the bag-making filling and packaging machine can be provided with a belt clearance setting function for the packaging material feeding device by a simple structure in which a clamp unit and a stopper mechanism are added. Further, the packaging material feeding device and the clamp unit are moved forward toward the filling cylinder until the feed belt is brought into contact with the filling cylinder and the gap becomes zero, and then away from the filling cylinder. By a simple operation of moving backward until the gap between the two is absorbed, an appropriate gap can be secured between the feed belt and the filling cylinder when the backward movement of the packaging material feeding device is completed. The clearance is not set directly in the narrow space between the filling cylinder and the endless feed belt, but from the outside, such as between or around the rod and the stopper attached to its tip. It can be done in an open space that is easy to see, and the gap can be easily confirmed. Even if the feed belt is worn, the packaging material feeding device is moved forward together with the clamp unit toward the filling cylinder, so that the gap is absorbed after contacting the filling cylinder. By moving backward until the pressure is increased, a predetermined appropriate gap can always be obtained between the feed belt and the filling cylinder.

FIG. 1 is a perspective view showing a main part of an embodiment of a bag-making filling and packaging machine provided with a belt gap setting function according to the present invention. FIG. 2 is a three-view view of a main part of a bag-making filling / packaging machine provided with the belt gap setting function shown in FIG. FIG. 3 is a diagram for enlarging the main part of the bag-making filling and packaging machine shown in FIGS. 1 and 2 and explaining the gap setting function. FIG. 4 is a perspective view showing an example of a conventional vertical bag-making filling and packaging machine. FIG. 5 is a diagram showing an example of a packaging material feeding device in a conventional vertical bag-making filling and packaging machine.

Hereinafter, an embodiment of the bag-making filling and packaging machine provided with the belt gap setting function according to the present invention will be described with reference to the attached drawings. FIG. 1 is a perspective view showing a main part of an embodiment of a bag-making filling / packaging machine having a belt gap setting function. 2A and 2B are three views showing a main part of the bag-making filling and packaging machine shown in FIG. 1, FIG. 2A is a front view, FIG. 2B is a side view, and FIG. 2C is a plan view. be.

Regarding the bag-making filling and packaging machine having the belt gap setting function shown in FIG. 1, the overall configuration of the bag-making filling and packaging machine in which the packaging material feeding device is used is the vertical length as shown in FIG. It may be the same as the configuration of the mold making bag filling and packaging machine. Therefore, when referring to the configuration of the vertical bag-making filling / packaging machine itself, the reference numerals used to describe the vertical bag-making filling / packaging machine shown in FIG. 4 can be used as they are. The description of the configuration of is omitted again. Further, in FIGS. 1 and 2, only the main part of the vertical bag-making filling / packaging machine 1 is shown.

The packaging material feeding devices 10 and 10 provided in the vertical bag-making filling and packaging machine 1 are laterally left and right with respect to the filling cylinder 53 of the vertical bag-making filling and packaging machine 50, similarly to the conventional packaging material feeding devices 56 and 56. It is a pair of arranged devices, which have a symmetrical structure and are arranged symmetrically. By forming the packaging material feeding devices 10 and 10 symmetrically with respect to the filling cylinder 53 and arranging them symmetrically with respect to the filling cylinder 53, the paper feeding of the tubular packaging material Ft is well-balanced on the left and right sides of the filling cylinder 53, and the cylinder shape is formed. When the packaging material Ft is fed, it is possible to suppress the occurrence of meandering or wrinkling in the tubular packaging material Ft. Since the vertical sealing device 54 is usually arranged at the front position of the filling cylinder 53, a guide structure for moving the packaging material feeding devices 10 and 10 forward and backward with respect to the filling cylinder 53, that is, horizontally and horizontally to each other and in the left-right direction. The two guide shafts 2 and 2 extending in parallel with each other are arranged behind the filling cylinder 53. The packaging material feeding devices 10 and 10 are slide-guided by the guide shafts 2 and 2, and are moved forward or backward while maintaining the symmetrical and opposed postures facing each other, and approach / separate from the filling cylinder 53. ..

The vertical bag-making filling and packaging machine 1 is related to each packaging material feeding device 10 having a feeding function for feeding a tubular packaging material Ft, and is provided with a clamp unit 30 and a stopper mechanism 40, which will be described later, for setting a gap. It is equipped with. Each packaging material feeding device 10 is filled with a main body portion 11 guided by the guide shafts 2 and 2 and a tubular packaging material Ft attached to the main body portion 11 and arranged so as to surround the filling cylinder 53. It is provided with a belt feed unit 12 for feeding along the line. The vertical bag-making filling / packaging machine 1 includes an advancing / retreating driving means 13 that acts on the main body 11 to move each packaging material feeding device 10 along the guide shafts 2 and 2 with respect to each packaging material feeding device 10. .. Each main body 11 includes a vertical plate-shaped main body block 14 through which the guide shafts 2 and 2 penetrate, and sleeves 15 and 15 attached to the main body block 14 through which the guide shafts 2 and 2 are slidably inserted. ing. Since the long sleeves 15 and 15 are slid-fitted to the guide shafts 2 and 2, the main body 11 is stably slid and moved with respect to the guide shafts 2 and 2. The structure of each packaging material feeding device 10 itself is the same as that of the packaging material feeding device 56 in the conventional vertical bag-making filling and packaging machine.

The belt feeding portion 12 of each packaging material feeding device 10 is driven by a base plate 20 attached to the main body block 14 of the main body portion 11, a drive motor (servo motor) 21 attached to the base plate 20, and a drive motor 21. The belt mechanism 22 is provided. Each belt mechanism 22 has a drive pulley 23 that is rotationally driven by a drive motor 21 and is rotatably supported by the base plate 20, a driven pulley 24 that is rotatably supported by the base plate 20, and appropriately rotatably supported by the base plate 20. It has a supported guide pulley 25, a drive pulley 23, a driven pulley 24, and an endless feed belt 26 wound around the guide pulley 25. These also have the same structure as the belt feed section in the conventional vertical bag-making filling and packaging machine.

Each of the pulleys 23 to 25 and the feed belt 26 is a timing pulley and a timing belt having meshing teeth, and it is preferable that the belt is driven accurately and reliably by meshing. Further, the feed belt 26 is a suction belt having at least one row of suction holes formed along the longitudinal direction, and a negative pressure source is placed on the back side of the feed belt 26 facing the tubular packaging material Ft around the filling cylinder 53. A suction box 27 connected to is arranged so as to accompany it. The feed belt 26 is belt-traveled by the drive motor 21, and the suction box 27 sucks air through the suction holes of the feed belt 26, so that the feed belt 26 sucks the tubular packaging material Ft on the front side and the tubular packaging material Ft. Is fed along the filling cylinder 53.

For each packaging material feeding device 10, the advancing / retreating driving means 13 is composed of an air actuator having one end attached to the main body frame 3 (see FIG. 3) and the other end attached to the main body block 14 of the main body 11. ing. The main body 11 is directly driven by the output of each air actuator, and the main body 11 moves along the guide shafts 2 and 2. Due to the movement of the main body 11, the entire packaging material feeding device 10 moves back and forth along the guide shafts 2 and 2.

For each packaging material feeding device 10, the tubular packaging material Ft is placed so as to pass through a gap formed between the endless feed belt 26 and the filling cylinder 53, and the filling cylinder is driven by the running of the feed belt 26. Paper is fed along 53. The gap varies depending on the thickness and characteristics of the packaging material, but a tentative guideline is set for each packaging material. In order to set such a gap between the feed belt 26 and the filling cylinder 53, a clamp unit 30 and a stopper mechanism 40 are provided for each packaging material feed device 10 in relation to one guide shaft 2 and the main body 3. Has been done.

The clamp unit 30 is a unit that is guided by one guide shaft (lower guide shaft) 2 so as to follow the packaging material feeding device 10 and enables the guide shaft 2 to be clamped. The clamp unit 30 is arranged on the outside of the main body block 14, that is, on the side far from the filling cylinder 53. With such an arrangement, the stopper mechanism 40 provided in relation to the clamp unit 30 can be easily visually recognized from the outside. As shown in FIG. 2B, the clamp unit 30 includes a unit main body 31 that surrounds the guide shaft 2, clamp pieces 32, 32 that are integrated from the unit main body 31 but extend in half, and clamp pieces 32, 32. The air actuator 33 is provided to output a force for gripping the guide shaft 2 by bringing the guide shafts 2 close to each other. When the air actuator 33 outputs to bring the clamp pieces 32, 32 closer to each other, the clamp pieces 32, 32 grip and clamp the guide shaft 2, and at this time, the clamp unit 30 cannot move with respect to the guide shaft 2. Will be.

FIG. 3 is a diagram for further enlarging a part of the vertical bag-making filling and packaging machine shown in FIGS. 1 and 2 and explaining the belt gap setting function of the packaging material feeding device 10. Referring to FIG. 3, a spring 34 is arranged between the packaging material feeding device 10 and the clamp unit 30 to urge the packaging material feeding device 10 and the clamp unit 30 to always separate from each other. Most of the urging spring 34 is housed in a hole (hole) 35 formed in the main body 11, and one end on the side close to the filling cylinder 53 is the bottom of the hole (in the case of a hole). It is a compression spring that is in contact with the lid plate that seals the opening), and the other end on the side far from the filling cylinder 53 protruding from the hole 35 is in contact with the side surface 36 on the main body 3 side of the clamp unit 30.

In relation to the clamp unit 30, a stopper mechanism 40 is provided to limit the relative movement amount of the packaging material feeding device 10 and the clamp unit 30 in the direction along the guide shaft 2 to an appropriate gap to be obtained. ing. The stopper mechanism 40 has a rod 41 whose base end side is attached to the main body block 14 of the packaging material feeding device 10 and which extends from the main body block 14 in the retracting direction and penetrates the clamp unit 30, and the rod 41 holds the clamp unit 30. It is provided with a stopper 42 that is attached to the penetrating tip side and is capable of contacting the clamp unit 30 on the other side surface 37. The clamp unit 30 can be moved in a direction parallel to their axes without rotation by the guide shaft 2 and the rod 41 extending in parallel. The rod 41 can be a bolt implanted in the main body block 14, and the stopper 42 can be a nut screwed into the bolt (rod 41).

FIG. 3 is also a diagram illustrating a belt gap setting function for the packaging material feeding device 10 shown in FIGS. 1 and 2. FIG. 3A is a diagram showing a state in which the packaging material feeding device and the clamp unit have started forward movement, and FIG. 3B is a diagram in which the feed belt is brought into contact with the filling cylinder and the clamp unit is operated to clamp the guide shaft. The figure which shows the state, (c) is the figure which shows the state which moved the packaging material feeding device backward and brought it into contact with a clamp unit.

3A and 3B show the first state in which the clamp unit 30 is in contact with the stopper 42 of the stopper mechanism 40. FIG. 3C shows a second state in which the main body 11 of the packaging material feeding device 10 is in contact with the clamp unit 30. The related configuration of the clamp unit 30 and the stopper mechanism 40 is as follows. That is, the clamp unit 30 is in the first state of contacting the stopper 42 of the stopper mechanism 40 on the side surface 37 with respect to the packaging material feeding device 10, and the main body block 14 of the main body 11 provided in the packaging material feeding device 10 on the side surface 36. It is possible to move relative to the second state in contact with. The distance that the clamp unit 30 can move relative to the stopper mechanism 40 between the first state and the second state may be a state in which the feed belt 26 and the filling cylinder (cylindrical packaging material Ft surround the clamp unit 30). ) 53, which is a distance corresponding to an appropriate gap set, and is suppressed to a very limited amount of movement. From this, it is understood that the structure and function of the clamp unit 30 and the stopper mechanism 40 are sufficiently simplified.

As shown in FIGS. 3A and 3B, the packaging material feeding device 10 and the clamp unit 30 are always urged in a direction away from each other by a spring 34 arranged between them. Therefore, when the clamp unit 30 does not clamp the guide shaft 2, the clamp unit 30 is separated from the packaging material feeding device 10 by the urging action of the spring 34 and comes into contact with the stopper 42 of the stopper mechanism 40. It is in a state. In the first state, when the packaging material feeding device 10 is driven back and forth with respect to the filling cylinder 53 by the air actuator (advancing / retreating drive mechanism 13), the clamp unit 30 follows the packaging material feeding device 10. Further, as shown in FIG. 3C, in the packaging material feeding device 10, when the clamp unit 30 clamps the guide shaft 2, the packaging material feeding device 10 is filled with the packing material feeding device 10 by driving the air actuator 13. By driving in the direction away from the clamp unit 30, a second state of contact with the clamp unit 30 can be achieved.

Hereinafter, a procedure for setting an appropriate gap between the feed belt 26 and the filling cylinder 53 in each packaging material feeding device 10 will be described based on the description of FIG. First, as shown in FIG. 3A, the clamp unit 30 can move along the guide shaft 2 in a free state in which the clamp operation by the air actuator 33, which is a clamp driving means, is not performed. Further, the feed belt 26 of the packaging material feed device 10 is sufficiently separated from the filling cylinder 53. The clamp unit 30 is urged in a direction away from the packaging material feeding device 10 by the action of the spring 34, and the clamp unit 30 is in contact with the stopper 42 of the stopper mechanism 40 on its side surface 37 by the urging force. , Both are restricted from moving further in the direction of separation. Therefore, a gap g1 corresponding to an appropriate gap to be set is formed between the main body block 14 of the main body portion 11 provided in the packaging material feeding device 10 and the side surface 36 of the clamp unit 30. In the figure, on the contact side of the main body block 14, the contact position with the side surface 36 of the clamp unit 30 is determined by an appropriate contact pin.

In this state, the packaging material feeding device 10 and the clamp unit 30 are guided by the guide shaft 2 and moved forward toward the filling cylinder 53 by the operation of the air actuator (advancing / retreating drive mechanism 13). This movement is performed until the feed belt 26 of the packaging material feeding device 10 is brought into contact with the filling cylinder 53 via the tubular packaging material Ft and the gap G between the feed belt 26 and the filling cylinder 53 becomes zero. (Fig. 3 (b)). At this time, the clamp unit 30 moves following the packaging material feeding device 10 in the first state in contact with the stopper 42 of the stopper mechanism 40. When the feed belt 26 of the packaging material feed device 10 is in contact with the filling cylinder 53, the air actuator 33 of the clamp unit 30 is activated, and the guide shaft 2 is clamped by the clamp pieces 32 and 32 to clamp. The unit 30 clamps the guide shaft 2. The clamp unit 30 cannot move along the guide shaft 2 in this clamped state.

Next, as shown in FIG. 3C, the packaging material feeding device 10 is moved backward in the direction away from the filling cylinder 53 by the operation of the air actuator (advancing / retreating drive mechanism 13). Since the clamp unit 30 is stopped, the packaging material feeding device 10 moves backward while compressing the spring 34, and accordingly, between the main body block 14 of the packaging material feeding device 10 and the side surface 36 of the clamp unit 30. The gap g1 generated in the clamp unit 30 is absorbed, and the gap g2 between the side surface 37 of the clamp unit 30 and the stopper 42 of the stopper mechanism 40 and the distance between the packaging material feeding device 10 and the filling cylinder 53 are increased by the absorbed amount. G increases. When the main body block 14 of the packaging material feeding device 10 abuts on the side surface 36 of the clamp unit 30 and the gap g1 = 0, the relationship between the packaging material feeding device 10 and the clamp unit 30 is in the second state, and more than that. The backward movement is stopped. An appropriate gap G is secured and set between the feed belt 26 of the packaging material feed device 10 and the filling cylinder 53. The clamp unit 30 is arranged on the outside of the main body block 14 (the side far from the filling cylinder 53), and the stopper 42 of the stopper mechanism 40 extends from the main body block 14 in the retracting direction and penetrates the clamp unit 30. Since it is attached to the tip end side of the rod 41, the space between the side surface 37 of the clamp unit 30 and the stopper 42 of the stopper mechanism 40 and its surroundings is open, and the gap g2 corresponding to the appropriate gap G is provided. It is easy to visually confirm that the gap G is generated from the outside, and as a result, it is possible to easily confirm the appropriate gap G.

According to this belt gap setting function, even if the feed belt 26 is worn, each packaging material feed device 10 moves forward together with the clamp unit 30 toward the filling cylinder 53 including the wear portion, and the filling cylinder is used. After abutting on the 53, the gap g1 is moved backward until the gap g1 is absorbed, so that a predetermined appropriate gap G is always obtained between the feed belt 26 and the filling cylinder 53.

The amount of screwing of the nut as the stopper 42 attached to the tip of the bolt as the rod 41 into the bolt can be changed. It is preferable to provide a slack preventive to the nut. Due to these changes, the relative movement amount between each packaging material feeding device 10 and the clamp unit 30, that is, the packaging material feeding device 10 in which the feed belt 26 abuts on the filling cylinder 53 via the tubular packaging material Ft is filled with the filling cylinder 53. The relative movement amount until the second state in which the packaging material feeding device 10 clamps the guide shaft 2 and comes into contact with the immovable clamp unit 30 can be changed. Therefore, the size of the gap G between the packaging material feed belt 26 and the filling cylinder 53 can be adjusted.

The packaging material feeding devices 10 and 10 have been described as a pair of devices arranged symmetrically, but in a smaller vertical bag-making filling and packaging machine, as a single packaging material feeding device at one location on the side of the filling cylinder 53. Although sometimes arranged, the present invention is also applicable to such a single packaging material feeding device. The air actuator 33 of the clamp unit 30 may be an electromagnetic actuator, or the model thereof may be a negative type (clamping operation with a spring when the actuator is OFF, non-clamping operation by releasing the spring when the actuator is ON). Further, the method of taking and setting the gap by the combination of the clamp unit 30 and the stopper mechanism 40 is not limited to the structure described in the figure as long as the combination can obtain the first state and the second state. , Any structure can be used.

1 Vertical bag-making filling and packaging machine 2, 2 Guide shaft 3 Main body frame 3a, 3a Guide frame 10 Packaging material feeding device 11 Main body
12 Belt feed unit 13 Advance / retreat drive mechanism (air actuator)
14 Main body block 15, 15 Sleeve 20 Base plate 21 Drive motor (servo motor)
22 Belt traveling mechanism 23 Drive pulley 24 Driven pulley 25 Guide pulley 26 Feed belt 27 Suction box 30 Clamp unit 31 Unit body 32, 32 Clamp piece 33 Air actuator 34 Spring (compression spring) 35 Hole 36, 37 Side surface 40 of clamp unit 6 Stopper mechanism 41 Rod 42 Stopper 50 Vertical bag making filling and packaging machine 51 Former 52 Hopper 53 Filling cylinder 54 Vertical sealing device 54a, 54b Vertical sealing block 55 Horizontal sealing device 55a, 55b Horizontal sealing block 56, 56 Packaging material feeding device 57 Cutter Device 58 Packaging material Feed belt 58a Suction hole 59 Suction box 60 Dancer roller 61 Adjust roller 62 First roller 63 Guide roller 70 Stopper mechanism 71 Female screw body 72 Stopper screw 73 Set screw 74 Contact part g1, g2 Gap G Setting gap A, B gap

Claims (6)

A filling cylinder that guides the product to be packaged through the inside of the cylinder and the tubular packaging material to be sent in a surrounding state.
A feed belt is provided which is arranged on the side of the filling cylinder and in which the tubular packaging material is placed in a gap formed between the filling cylinder and the filling cylinder. A packaging material feeding device that feeds packaging material along the filling cylinder,
A guide shaft extending in a manner of guiding the packaging material feeding device in an approaching or retracting direction with respect to the filling cylinder, and a guide shaft.
An advancing / retreating driving means for driving the packaging material feeding device to advance / retreat along the guide shaft ,
A clamp unit that is guided by the guide shaft so as to follow the packaging material feeding device and enables the guide shaft to be clamped.
With a stopper mechanism that limits the relative movement amount of the packaging material feeding device and the clamp unit in the direction along the guide shaft to the gap.
Equipped with
The clamp unit is arranged on the side far from the filling cylinder with respect to the packaging material feeding device.
The stopper mechanism includes a rod extending from the packaging material feeding device in the retracting direction and penetrating the clamp unit, and a stopper attached to the tip of the rod penetrating the clamp unit and capable of contacting the clamp unit. And equipped with
The clamp unit can move relative to the packaging material feeding device by a distance corresponding to the gap between the first state of contact with the stopper and the second state of contact with the packaging material feeding device. A bag-making filling and packaging machine equipped with a belt clearance setting function. When the clamp unit does not clamp the guide shaft, the clamp unit can follow and move with respect to the packaging material feeding device driven to move forward and backward in the first state in contact with the stopper. ,
In the packaging material feeding device, when the clamp unit clamps the guide shaft, an appropriate gap is formed with the filling cylinder in the second state in contact with the clamp unit. The bag-making filling and packaging machine having the belt gap setting function according to claim 1 . The rod is a bolt, the stopper is a nut screwed into the bolt, and the relative movement amount between the clamp unit and the packaging material feeding device is changed by changing the screwing amount of the nut into the bolt. The bag-making filling / packaging machine having the belt gap setting function according to claim 1 or 2 , wherein the size of the gap between the filling cylinder and the packaging material feed belt can be adjusted. A spring is arranged between the packaging material feeding device and the clamp unit to urge the packaging material feeding device and the clamp unit in a direction that always separates them.
Claims 1 to 3 comprising moving the clamp unit following the packaging material feeding device by being in the first state in which the clamp unit urged by the spring abuts on the stopper. A bag-making filling and packaging machine equipped with the belt clearance setting function described in any one of the items. The item according to any one of claims 1 to 4 , wherein the packaging material feeding device, the advancing / retreating drive mechanism, the clamp unit, and the stopper mechanism are arranged in a pair symmetrically with respect to the filling cylinder. A bag-making filling and packaging machine equipped with the described belt clearance setting function. The bag-making filling and packaging machine is
A former in which the strip-shaped packaging material is bent into a substantially cylindrical shape and the filling cylinder is inserted through the former.
A vertical sealing device that applies a vertical seal to the side edge portion of the strip-shaped packaging material in order to form the curved strip-shaped packaging material into the tubular packaging material.
It is further provided with a horizontal sealing device for laterally sealing the tubular packaging material in the transverse direction, and a strip-shaped packaging material guiding device for guiding the feeding of the strip-shaped packaging material to the tubular manufacturing unit.
Claim 1 comprising a vertical bag-making filling and packaging machine that continuously manufactures a bag package in which a product is put into the bag formed in advance while forming a bag from the tubular packaging material. A bag-making filling / packaging machine having the belt gap setting function according to any one of 5 to 5 .

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