JP2000226007A - Packaging material pay-out device for bag-making, filling and packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and surely position a pay-out belt by a method wherein pay-out units for cylindrical packaging material are arranged at both sides of a cylindrical packaging material and each of the pay-out units is supported so as to move freely over a plane guide member and to be positioned respectively by operation of linear actuators. SOLUTION: After being measured by a measuring machine, products are put into a filling tube 2 through an intermediary hopper 4. A packaging material formed in a cylindrical shape of a film supplied from a roll via a former is supplied to the outer circumference of the filling tube 2 so as to wrap around the filling tube 2, and the products are put into the filling tube after vertical sealing is applied to the packaging material. Packaging material pay-out units 21 are arranged at both sides on the right and left of the filling tube 2 and supported so as to move freely along upper and lower horizontal rods 33 while each of the pay-out units 21 is constructed with an endless suction belt 22 provided therein. Then, the pay-out units 21 are moved for positioning respectively in the horizontal direction by operations of air cylinders 45 through positioning members 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag making and filling machine, and more particularly to a packaging material feeding device used for feeding a packaging material.

[0002]

2. Related Background Art A packaging material feeding device of this kind of bag making and filling machine is disclosed, for example, in Japanese Patent Publication No. 3-17691 and Japanese Patent Application Laid-Open No. 9-586.
No. 06, respectively. The former packaging material feeding device includes a pair of left and right stopper members for positioning the pair of left and right feeding belts with respect to the diameter of the cylindrically formed packaging material, and a stopper on a corresponding side of the support block of each feeding belt. By contacting the members, the positioning of each feeding belt is performed.

On the other hand, in the case of the latter packaging material feeding device,
The appropriate positions of the pair of left and right feeding belts are previously obtained and stored for each of the cylindrical packing materials having various diameters, and each feeding belt is moved to the proper position according to the diameter of the used cylindrical packing material. It is configured to perform positioning.

[0004]

In the case of the former packaging material feeding device described above, since the pair of left and right stopper members move in conjunction with each other, the positions of the left and right feeding belts cannot be adjusted independently. For this reason, if the replacement parts such as the former and the filling tube for forming the packaging material into a cylindrical shape are not correctly assembled, the positions of the left and right delivery belts with respect to the cylindrical packaging material will not be appropriate, and the delivery of the packaging material will be performed. To meander. This problem is remarkable when the feeding belt is a suction belt of a type that sucks the packaging material.

The feeding belt is opened and closed with respect to the cylindrical packaging material by expansion and contraction of an air cylinder. In this case, the expansion and contraction stroke of the air cylinder (piston rod) is determined by the maximum diameter of the cylindrical packaging material to be applied. In addition to being able to cover, furthermore, in order to feed out the packaging material by hand and form it into a cylindrical shape at the time of setup, it is necessary to ensure a sufficient space between the filling tube and the feeding belt so that the hand can enter. . For this reason, the expansion / contraction stroke of the air cylinder becomes longer, which leads to an increase in size.

On the other hand, in the case of the latter packaging material feeding device, it is necessary to determine an appropriate position of the feeding belt for each diameter of the various cylindrical packaging materials to be applied. It takes time. In addition, if an error occurs in assembling the former and the filling tube, the position of the feeding belt obtained in advance is no longer appropriate. The present invention has been made based on the above-described circumstances, and its purpose is to accurately position the feeding belt,
Further, it is an object of the present invention to provide a packaging material feeding device of a bag making and packaging machine which can use a small fluid pressure cylinder for opening and closing the feeding belt.

[0007]

The above object has been achieved by the present invention, and a packing material feeding device of a bag making and packaging machine according to the present invention (Claim 1) is disposed on both sides of a cylindrical packing material, respectively. With the running of the endless feeding belt, a feeding unit that feeds out the cylindrical packaging material, a guide member that movably guides each feeding unit toward and away from the cylindrical packaging material, and each feeding unit and guide. A positioning member, which is provided between the corresponding side end of the member and is movable on the guide member and can be independently fixed at an arbitrary position, and a connection between the positioning member and the corresponding side feeding unit, respectively. A linear actuator for moving the feeding unit toward and away from the positioning member.

According to the above-described packaging material feeding device, the linear actuator is operated up to the maximum operation stroke, and the feeding belt is positioned at an appropriate position with respect to the cylindrical packaging material in a state where the feeding unit is most separated from the positioning member. To position, the position of the positioning member on the guide member is determined. After such positioning, the feeding unit is opened and closed, that is, comes into contact with and separates from the tubular packaging material by the operation of the linear actuator.

Each linear actuator is composed of a hydraulic cylinder, the cylinder body of which is mounted on the corresponding feeding unit, and the two hydraulic cylinders are arranged with their axes shifted from one another. 2). In this case, each dispensing unit will be closed by extension of the hydraulic cylinder and then opened by its contraction.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, a vertical bag making and filling machine is provided with a filling tube 2, which extends vertically. A relay hopper 4 is formed integrally with the upper end of the filling tube 2. The relay hopper 4 is connected to the product hopper 8 via the measuring device shutter 7,
A large number of products to be filled and packed are stored in the measuring device 6 above the product hopper 8. After the product is measured by the measuring device 6, the product is transferred to the measuring device shutter 7 through the product hopper 8, and is put into the filling tube 2 via the relay hopper 4.

The upper end of the filling tube 2 is surrounded by a packaging material forming device, a so-called former 10, and the packaging material F fed from the packaging material roll R via the former 10 is guided downward along the filling tube 2. ing. Here, the packaging material F is a heat-sealable film, and the former 10 forms the packaging material F outside the filling tube 2 into a tubular shape, and both side edges thereof are overlapped in a predetermined form by a wrap unit described later. You. Therefore, the tubular packaging material F that has passed through the former 10 and the wrap guide surrounds the filling tube 2 from the outside.

As shown in FIG. 2, the wrap unit 12 is disposed immediately below the former 10 and has a pair of guide pieces 14 and 16. The guide pieces 14 and 16 are separated from the outer peripheral surface of the filling tube 2 with a predetermined gap therebetween, guide the both side edges of the tubular packaging material F and overlap them in a predetermined form to form a vertically sealed portion. . Specifically, the wrap unit 12 overlaps both side edges of the tubular packaging material F for the purpose of covering the arms or the envelope.

The above-mentioned filling tube 2, former 10 and lap unit 12 are respectively mounted on a horizontal mounting plate 18, and the mounting plate 18 itself can be detached from a frame 20 of the packaging machine via left and right support / lock mechanisms 19. Attached to. In addition, the charging tube 2, the former 10, and the wrap unit 12 have the diameter of the cylindrical packaging material F,
That is, it is a component that is replaced according to the size of the bag making.

On both left and right sides of the filling tube 2, feed units 21 for the tubular packaging material F are arranged, and details of the feed unit 21 are shown in FIG. Since the left and right feeding units 21 have the same configuration, only one feeding unit 21 will be described. The feeding unit 21 has an endless suction belt 22 as a feeding belt. The suction belt 22 is extended vertically by being hung between toothed pulleys 23 spaced vertically. The toothed pulley 23 is rotatably supported by a unit base 25. One toothed pulley 23, that is, the lower toothed pulley 23, has its pulley shaft connected to a servomotor 27. Therefore,
Each suction belt 22 runs in one direction in conjunction with the rotation of the servomotor 27. Further, a suction box 29 is attached to the unit base 25, and the suction box 29 is provided with upper and lower toothed pulleys 2.
3, and extend in the up-down direction. The suction box 29 is formed as a suction surface whose surface on the side of the filling tube 2 is in sliding contact with the inner surface of the suction belt 22, and applies a predetermined suction force to the suction belt 22.
That is, the suction box 29 is provided with the suction supply hole 3.
The suction supply hole 31 is connected to a negative pressure source via a suction hose. In the figure, a suction hose, a negative pressure source and its pneumatic control circuit are omitted.

The left and right feeding units 21 have their unit bases 25 attached to a pair of upper and lower horizontal rods 33 as guide members, and can slide on the horizontal rods 33. Each horizontal rod 33 has a side plate 37 at each end.
, And these side plates 37 are attached to a cross plate 39. The cross plate 39 extends horizontally, and both ends thereof are connected to the frame 20 of the packaging machine.

The upper and lower horizontal rods 33 are provided with plate-shaped positioning members 41 located at both ends thereof and straddling between the horizontal rods 33. These positioning members 41 are slidable on the upper and lower horizontal rods 33, and can be fixed to the lower horizontal rod 33 at an arbitrary position by a lock mechanism 43 having a handle 42.

An air cylinder 45 as a linear actuator is attached to the back of each unit base 25. More specifically, each air cylinder 45 is supported by the unit base 25 with its cylinder body being horizontal, and the tip of the piston rod is connected to the corresponding positioning member 41 on the side. Then, as is apparent from FIG. 3, the left and right air cylinders 45 are arranged to be shifted from each other in the vertical direction.

When the air cylinder 45 is in the state shown in FIG. 3, each air cylinder 45 is completely contracted, and at this time, there is a sufficient space between the filling tube 2 and the suction belt 22 of each feeding unit 21 so that a hand can enter. Spacing is ensured. FIG.
When the piston rod of each air cylinder 45 is completely extended from the state of FIG.
The left and right suction belts 22 move toward the filling tube 2 and are positioned at appropriate positions close to the filling tube 2. Specifically, each suction belt 22
An appropriate gap of, for example, 0.5 to 1.0 mm is ensured between the tube and the filling tube 2.

When a suction force is supplied to the suction belt 22 in such a state that the suction belt 22 is close to the suction belt 22, the left and right suction belts 22 adsorb the tubular packaging material F surrounding the filling tube 2 from both sides. . After this,
When the left and right suction belts 22 run synchronously,
The suction belt 22 is drawn out along the filling tube 2 while adsorbing the tubular packaging material F. Along with this feeding, the packing material F is continuously formed into a cylindrical shape by the above-described former 10 at the upper part of the filling tube 2, and the both side edges of the cylindrical packing material F are continuously formed as vertical sealed portions by the wrap unit 12. Are superimposed.

As shown in FIG. 1 and FIG. 2 simply by a block, a vertical heat sealer 24 is disposed near the filling tube 2. The vertical heat sealer 24 is located below the wrap unit 12 described above. After the tubular packaging material F has passed through the wrap unit 12, the vertical seal portion is heated and welded, that is, a heater block 66 (see FIG. 2)
Having. Note that the vertical heat sealer 24 is also supported so as to be able to approach and separate from the filling tube 2.

Further, as schematically shown in FIG. 1, a horizontal heat sealer 26 is disposed below the filling tube 2. The horizontal heat sealer 26 operates in conjunction with the feeding of the tubular packaging material F, and horizontally seals the tubular packaging material F after the vertical sealing at a predetermined interval in the feeding direction. Cut in the center and produce individual bags continuously. Here, the above-mentioned horizontal sealing and cutting are performed alternately with the charging of the product into the filling tube 2, that is, the cylindrical packaging material F, whereby the product is individually filled in the bag making. become.

As shown in FIG. 1, below the horizontal heat sealer 26, a belt conveyor 3 is mounted via a chute 30.
2, the belt conveyor 32 receives the individual bag-making products P dropped from the horizontal heat sealer 26 via the chute 30, and transports the received bag-making products P to a box packing machine (not shown). I do. Next, regarding the size of the bag making, that is, the replacement of the former 10 and the filling tube 2 and the like which are replaced according to the diameter of the cylindrical packaging material F, and the positioning of the feeding unit 21 performed after the replacement.
This will be described with reference to FIGS.

First, when exchanging the former 10 and the filling tube 2 etc., the handle 42 of the left and right locking mechanism 43 is used.
To release the fixation of the left and right positioning members 41.
In this state, as shown in FIG.
The upper and lower horizontal rods 33
To the side plate 37 along. At this time, the air cylinder 45 of each feeding unit 22 is completely contracted, and the feeding unit 21 is in contact with the positioning member 41.

In this way, the left and right feeding units 21
By widening the interval between the former 1 after use
It is possible to easily remove the 0 and the filling tube 2 and the like, and assemble the former 10 and the filling tube 2 and the like having different sizes and diameters (see FIG. 4). Further, in this state, a new packaging material F can be fed out through the former 10, and the packaging material F can be easily formed into a cylindrical shape so as to surround the outside of the filling tube 2.

Thereafter, as shown in FIG. 5, the air cylinders 45 of the respective feeding units 21 are completely extended,
The feeding unit 21 is separated from the positioning member 41 by the maximum extension stroke of the air cylinder 45. At this time, the left and right air cylinders 45 come close to each other,
As described above, since the left and right air cylinders 45 are vertically displaced from each other, the air cylinders 45 do not interfere with each other.

Next, while maintaining the maximum extension state of the air cylinder 45, the left and right positioning members 41 with the feeding unit 21 are moved toward the newly assembled filling tube 2, and each of them is moved as shown in FIG. The suction belt 22 of the feeding unit 21 is brought into contact with the filling tube 2 via the shim S and the packaging material F. Thereafter, the handle 42 of each lock mechanism 43 is operated, the left and right positioning members 41 are fixed to the horizontal rod 33, and the left and right shims S are pulled out.

The thickness of the shim S is set so as to secure the above-mentioned appropriate gap D1 between the filling tube 2 and the suction belt 22, that is, a gap of 0.5 to 1.0 mm. Specifically, the shim S has a T-shape as shown in FIG. 7 and can be easily inserted and pulled out.
Thereafter, the operation of the packaging machine is started, and the above-described bag making and filling packaging is performed.

If the gap D1 becomes wider than the above range, the suction of the cylindrical packaging material F by the suction belt 22 is weak, and a slip occurs between the suction belt 22 and the cylindrical packaging material F, and the product is manufactured. The bag length is shorter than the regular length. Further, the width of the above-mentioned vertical sealed portion is reduced, and as a result, the width of the bag making is wider than the regular width. Conversely, if the gap D2 is smaller than the above range, there is a risk that the suction belt 22 comes into contact with the filling tube 2 via the tubular packaging material F. In this case, the resistance for feeding the tubular packaging material F is reduced. However, there is a problem that the packing material is offset, and the length of the bag is shorter than the regular length.

When the operation of the packaging machine is stopped by receiving an abnormal signal due to a deviation (meandering) or jamming of the packaging material F,
The opening / closing operation of the feeding unit 21 is required as a return operation. In other words, the feeding unit 21 is opened, and the deviation of the cylindrical packaging material F is adjusted by hand to return to the normal position, or the operation of passing the packaging material F is performed again. In this case, as shown in FIG. 8, the air cylinder 45 of each feeding unit 21 is completely contracted, and the feeding unit 2
1 is in contact with the corresponding positioning member 41. That is,
The left and right feeding units 21 are opened via the filling tubes 2, and a predetermined interval D2 corresponding to the maximum extension stroke of the air cylinder 45 is secured between each feeding unit 21 and the filling tube 2.

Here, the distance D2 is set between the suction belt 22 and the filling tube 2 when passing the cylindrical packing material F guided from the packaging material roll R via the former 10 along the filling tube 2. May be enough to enter. That is, the maximum extension stroke of the air cylinder 45 may be short, and a small air cylinder 45 can be used.

Thereafter, when the operation of the packaging machine is restarted, the air cylinder 45 is completely extended, and the left and right feeding units 2 are extended.
When 1 is closed, the above-mentioned appropriate gap D1 can be accurately secured between each suction belt 22 and the filling tube 2, and the reproducibility is excellent. The present invention is not limited to the above-described embodiment, and various modifications are possible. For example, in one embodiment, the delivery unit 21 is closed and opened by the expansion and contraction operation of the air cylinder 45, but it is of course possible to reverse the delivery unit. Further, instead of the air cylinder, various linear actuators having a constant maximum operation stroke can be used.

[0032]

As described above, according to the packaging material feeding device of the bag making and filling machine of the present invention (claim 1), the positioning of the feeding belt is performed in a state where the linear actuator is operated up to the maximum operation stroke. To make
The feeding belt can be positioned at the appropriate closed position for various types of cylindrical packaging materials with different diameters, and even if the feeding belt is opened and closed, the position of the feeding belt at the time of closing becomes accurate, and its positioning is reproducible. It will be excellent. The maximum operation stroke of the linear actuator can be set independently of the diameter of the cylindrical packaging material.When the feeding belt is opened, the interval between the feeding belt and the cylindrical packaging material is set such that the packaging material can be pulled around. Since it is sufficient that the linear actuator can be secured, a small linear actuator can be used.

A hydraulic cylinder (claim 2) is used for the linear actuator. In this case, if the cylinder body of the hydraulic cylinder is attached to the feeding unit, the arrangement space for the hydraulic cylinder is provided outside the feeding unit. If the two hydraulic cylinders are not on the same axis but are displaced from each other, it is possible to prevent interference between the hydraulic cylinders when the feeding unit is closed.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a vertical bag making and filling machine.

FIG. 2 is an enlarged front view showing a part of the packaging machine of FIG. 1;

FIG. 3 is a detailed view showing a device for feeding a packaging material.

FIG. 4 is a view showing a state of the feeding device immediately after the filling tube is assembled.

FIG. 5 is a diagram showing a positioning process of the payout belt;
FIG. 7 is a diagram showing a next stage from the state of FIG.

FIG. 6 is a diagram showing a next step from the state of FIG. 5 regarding the positioning process.

FIG. 7 is a side view of the shim.

FIG. 8 is a diagram showing a state in which the feeding unit is opened.

[Explanation of symbols]

 2 Filling tube 10 Former 21 Feeding unit 22 Suction belt (feeding belt) 33 Horizontal rod (guide member) 41 Positioning member 43 Lock mechanism 45 Air cylinder F Cylindrical packaging material

Continued on the front page (72) Inventor Tomoo Hosono 149 Komagaidai, Nagareyama-shi, Chiba Pref.Tokyo Automated Machinery Laboratory Co., Ltd. (72) Inventor Takayuki Kanai 149 Komagaidai, Nagareyama-shi, Chiba Pref. F-term in the Machinery Laboratory (reference) 3E050 AB02 CA02 CA08 CA09 DC02 DC08 DC09 DD03 DF01 FA01 FB01 FB07 GB06 GC06 GC07 HB02 HB08

Claims (2)

[Claims] 1. A bag making / filling and packing machine for forming a tubular shape while feeding a long packaging material, and filling and packaging an article to be packaged in the tubular packaging material. A dispensing unit for dispensing the tubular packaging material with the endless dispensing belt running, and a guide member for movably guiding the dispensing units to and away from the tubular packaging material. A positioning member that is provided between each of the feeding units and a corresponding side end of the guide member, and that can move on the guide member and can be independently fixed at an arbitrary position; And a linear actuator for connecting the feeding unit to the feeding unit on the side to be moved and for bringing the feeding unit into and out of contact with the positioning member. Apparatus. 2. The linear actuator according to claim 1, wherein each of the linear actuators is a hydraulic cylinder attached to the delivery unit on a corresponding side of the cylinder body, and the two hydraulic cylinders are arranged with their axes shifted from each other. The packaging material feeding device of the bag making and filling and packaging machine according to claim 1, wherein: