JPH0349806B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a continuous bag in which a plurality of bags arranged vertically with the openings facing the sides are continuously formed at the perforations. The present invention relates to an automatic filling device that fills each bag with contents after separating the bags into each bag.

[Conventional technology]

As a method for continuously filling bags with contents,
For example, JP-A No. 58-112923 and Utility Model Application No. 58-94611
As disclosed in the No. 1, a plurality of bags separated into individual bags are stacked and held, and each bag is taken out with a suction cup or the like and fed to the filling section, and
As disclosed in No. 53-47007 and Japanese Patent Application Laid-open No. 52-94296, the openings of a plurality of bags formed separately are shifted and sequentially adhered to tape, and the bags are separated while feeding the tape. A method is known in which an opening is opened to prepare for filling.

[Problem to be solved by the invention]

However, in the former method of the above-mentioned known techniques, there is a limit to the number of bags that can be held at one time, and it is necessary to replenish the bags frequently, which is troublesome. It had the disadvantage of high cost due to the process of adhering to the tape. In addition, although there are continuous bags that can be easily separated in both cases, it is not possible to perform the process from separating the continuous bags to filling the bags with a single device, resulting in extremely low work efficiency. It was.

In view of the above-mentioned circumstances, the present invention focuses on the fact that a plurality of bags are continuously manufactured as a raw fabric, and the raw fabric is loaded into a filling device as it is without separating it into individual bags, and separation and filling are performed. We aim to provide an automatic filling device that is highly efficient in one flow.
That is the purpose. Furthermore, the present invention
Before separation, continuous bags are prevented from meandering, and
The object of the present invention is to provide an automatic filling device that eliminates filling defects by always keeping the bags in the correct position during filling by transporting the bags in the separated form to a filling section after separation.

[Means to solve the problem]

In order to achieve the above object, the present invention has provided a continuous bag in which a plurality of bags arranged in a column with openings facing the sides are continuously formed at perforations, and after separating into each bag at the perforation position, The device that fills the bag with contents includes a guide section that pulls out and guides the continuous bag from the original fabric, a separation section that separates the continuous bag into each bag at perforations, and an expander that opens the tightly closed opening of each bag in preparation for filling. a mouth part and a filling part for filling the contents into the bag,
They are arranged and configured as described below in the conveyance direction of continuous bags.

The guide section is constructed by attaching a position regulating member that contacts the side edge of the continuous bag to a guide roller that guides the feeding of the continuous bag.

The separation section separates the continuous bags sent from the guide section into individual bags at its perforations, and has a first pinch roll and a second pinch roll adjacent to each other in sequence. The second pinch roll placed on the wide opening side is set to have a higher conveyance speed than the first pinch roll when separating continuous bags, and due to the speed difference, the continuous bags are separated into individual bags at the perforations. ing. Alternatively, the first and second pinch rolls may be rotated at the same speed, and when the perforation is located between the two pinch rolls, the speed of the first pinch roll may be reduced or stopped. That is, it is sufficient that the conveying speed of the second pinch roll is higher than that of the first pinch roll when separating the continuous bags.

The widening section includes a pressing body that widens the opening of the separated bag, and a chuck body that grips the inner surface of the widened opening. The pressing body has a pressing piece that is disposed above the opening of the bag and moves toward the bottom of the bag while pressing the outer surface of one sheet of the bag near the opening. The material of the pressing piece is selected so that the coefficient of friction between the pressing piece and the bag is larger than that between the bags. On the other hand, the chuck body is located on the side of the opening of the bag and moves in parallel with the bag at the same speed, and when the pressing piece moves toward the bottom of the bag to enlarge the opening, It is adapted to grip the other sheet of the opening.

The filling section includes a blower pipe that blows air into the bag from the opening of the bag gripped by the chuck body, and a piston body that fills the bag with the contents through the opening that is opened wide by the air. are doing. If the gripping force of the chuck body is set to increase during filling, even if the pushing force of the piston body is increased depending on the type of contents, there is no risk of the bag coming off from the chuck body, increasing reliability. improved,
More preferred.

[Effect]

According to the present invention as described above, filling is performed in the following manner.

The continuous bag is guided while being positioned by the side edges of the bag coming into contact with the position regulating member in the axial direction of the guide roller, and is conveyed by the guide roller to the separating section. Therefore, the continuous bag does not shift in its width direction.

The continuous bags brought to the separating section are separated at perforations by the speed difference between the first and second pinch rolls, and become separate bags.

The second pinch rolls pinch the separated bags and convey them to the widening part, but the first pinch rolls, which were pinching the leading ends of the continuous bags, temporarily release the pinch force. Therefore, if there is a shift in the width direction at the leading end of the continuous bag, the width direction is corrected by the contact force exerted by the position regulating member on the side edge of the continuous bag.

At the opening of the separated bag, the upper sheet of the bag is pressed by the pressing body and shifted toward the bottom edge of the bag, so that the lower sheet is exposed at the opening and is gripped by the chuck body. be done.

Thereafter, air is blown into the bag in the filling section to widen the opening, through which the contents are filled by the piston body.

〔Example〕

Embodiments of the present invention illustrated in the accompanying drawings will be described below.

FIG. 1 is a perspective view showing the entire device of this embodiment.
On the right side of the device frame 1, there is a material support arm 2 that rotatably supports a material P made of a continuous bag 9 in a roll shape.
is provided. The continuous bag 9 is placed in a state where its opening is located on the left side with respect to the transport direction arrow X in the figure.
A large number of bags are continuously formed at perforations 92.

Above the web support arm 2, a guide section A, a separation section B, an enlarged opening section C, and a filling section D are arranged in this order on the upper surface of the apparatus frame 1.

The guide section A has elongated guide rollers 3, 3 that are rotatably supported by support arms 31 extending from the frame 1, and guides the continuous bags 9 in the conveying direction. It is sufficient that at least one guide roller 3 is provided, and a continuous bag 9 is provided on the right side of the guide roller 3 so that the bags are conveyed at the correct position in the width direction in the subsequent process. A regulating roller 32 is provided as a position regulating member that regulates the position of the side edge. Note that the reference roller 3 attached to the left end position of the guide roller 3
3 is for determining the reference position of the continuous bag 9 in the width direction. Therefore, if different widths are set for continuous bags depending on their type, the regulating roller 32 is set at the above width position with reference to the reference roller 33 in a fixed position, and thus the continuous bags are set on both sides. Positioning in the width direction is achieved by the edges coming into contact with both rollers 32, 32.

Furthermore, even if the above-mentioned original fabric is folded as shown in FIG. 6, it can be passed through the guide section A in exactly the same manner.

Separation part B consists of a pair of first pinch rolls 4.
141' and second pinch rolls 42, 42', and a continuous bag 9 is provided between the upper rollers 41, 42 of both pinch rolls and between the lower rollers 41', 42'.
A plurality of belts 43, 43...;4 conveying the
3', 43'... are each stretched. A first sensor 45 for detecting the perforation 92 of the continuous bag is disposed between the first and second pinch rolls, and the first pinch rolls 41 and 41' are connected to the perforation machine of the first sensor 45. The rotation stops upon receiving the eye detection signal, and immediately after that, the upper and lower rolls 41, 41'
The upper roll 41 is set to rise slightly in order to release the contact pressure, and then return to the contact pressure before the next separation operation at the perforation. Note that third pinch rolls 44, 44' are disposed at the forward end of the separation section B in the conveying direction, and between the second pinch rolls 42, 42', the upper and lower rollers 44, 42; Conveying belts 51 and 51' are stretched across 44' and 42'.

In front of the separating section B in the X direction, an enlarged opening section C is provided at a position on the side of the opening of the bag 91, which is conveyed by the belts 51 and 51' after being separated.
The widening part C includes a pressing body 6 located above the opening of the bag 91 to widen the opening, and a pressing body 6 located to the side of the opening to widen the opening. The chuck body 7 is gripped and moved to a filling section D, which will be described later.

As shown in detail in FIG. 2, the pressing body 6 is an air cylinder 6 whose upper portion is rotatably supported.
At the tip of the rod 62 that moves up and down, there is a pressing piece 6 that is pressed at an appropriate position against the opening of the bag 91.
3 and 63, and the lower part of the air cylinder 61 is connected to a horizontal lever 64 rotatably connected to the air cylinder 61.
a, 64b and a vertical lever 65 to a rod 67 of another air cylinder 66 which operates in the horizontal direction. The material of the pressing piece 63 is such that the coefficient of friction between the pressing piece 63 and the bag 91 is larger than that between the bags 91. The two air cylinders 61 and 66 are set so that the latter rod 67 operates toward the bottom of the bag (toward the right in FIG. 2) immediately after the former rod 62 descends.

On the other hand, the chuck body 7 has upper and lower chuck pieces 71 and 72 that can be opened and closed.
5, the upper chuck piece 72 is connected to the lower chuck piece 71 by a parallel link 73, and between the chuck pieces 71 and 72, the upper chuck piece 72 is tilted forward and connected to the lower chuck piece 71. A spring 74 that generates a pressing force is installed, and the rear end of the upper chuck piece 72 is bent into an L-shape, and the bent portion 76 is connected to the air cylinder 66.
A locking piece 68 attached to the tip of the rod 67
The spring 74 is held against the tensile force of the spring 74. Further, at a position parallel to the locking piece 68 in the forward direction in the conveying direction (on the right side in FIG. 2), as the belt 75 runs, the bent portion 76 of the upper chuck piece starts to lock, causing the parallel link to stand up. A cam plate 69 is provided. For that purpose, the thickness of the cam plate 69 is gradually increased rearward so that the bent part 76 is gradually retracted and a parallel link is erected. The bent portion 76 is formed as shown in FIG.
9, the locking piece 68 locks with the locking piece 68.

In addition, in the conveyance direction of the bag 91, the third pinch roll 4
A second sensor 60 that detects the tip of the bag 91 is disposed in front of the bag 91, and the second sensor 60 measures the width of the bag 91, the conveyance speed, the distance between the second sensor and the pressing body 6, etc. Taking this into consideration, when the center of the bag 91 reaches the position of the pressing body 6, a signal is generated by the timer to activate the cylinder 6.

Next, the filling section D is operated by a blower (pipe) 81 that blows air into the opening of the bag 91, in which the sheet below the opening is gripped by the above-mentioned chuck body 7, and the bag is opened wide by the air. It has a piston body (not shown) that pushes the contents into the opening. It is preferable that the chuck body 7 increases its gripping force on the bag during the filling operation by the piston body. Next, the operation of this embodiment having the above structure will be explained with reference to FIGS. 3 to 5 which show the order of operation of the pressing bodies.

First, in FIG. 1, the leading end of the continuous bag 9 is pulled out from the original fabric P, and guided by the guide rollers 3 of the guide section A to the first pinch rolls 41 and 41' of the separation section B.
You will be guided to. The continuous bag 9 is transferred to the second pinch roll 4 by the first pinch rolls 41, 41'.
2, 42', and then the first sensor 45
detects the leading end of the continuous bag 9, and when the first perforation 92 comes between the pinch rolls 41, 42, the first pinch rolls 41, 41' stop, and the continuous bag 9 moves to the second pinch rolls 42, 42. 42', the perforation 92 is pulled forward in the conveying direction.
It is separated into an independent bag. Immediately after that, the upper roller 41 of the first pinch roll rises and the belt 4
3 and 43' are separated on the upper roller 41 side, the pinch force is released. Therefore, since the continuous bag 9 can be moved in the width direction, if the continuous bag 9 is misaligned in the width direction at the tip, the continuous bag 9 will have its side edge on the guide part. Guide roller 3
The regulation roller 32 and the reference roller 3 attached to the
The position is corrected by the contact force acting on the side edge of the continuous bag 9 between the bag and the bag. Note that since this correction is performed for each bag in each separation operation, the amount of deviation that occurs is small.

Next, after a certain period of time has elapsed, the upper roller 41 descends again, and the new leading end of the continuous bag 9 is conveyed to the second pinch rolls 42, 42'.

On the other hand, the separated and independent bags described above are conveyed to the wide opening section C while being sandwiched between the belts 51 and 51'. When the second sensor 60 detects the tip of the bag 91, the timer activates the pressing body 6 when the center of the bag 91 reaches the position of the pressing body 6. That is, in FIG. 3, the rod 62 of the air cylinder 61 is lowered, and the pressing piece 63 presses the upper surface of the sheet above the bag 91.

At the same time, the chuck body 7 attached to the belt 75 also moves forward, and the rear bent portion 76 of the upper chuck piece 72 of the chuck body 7 starts to engage with the cam plate 69, and as the chuck body 7 advances, the bent portion 76 moves backward. Step back and let the link 73 of the chuck body 7 stand up against the spring 74. As the chuck body 7 further advances, the bent portion 76 comes off the cam plate 69, and the bent portion 76 is locked to the locking piece 68 attached to the tip of the rod 67 of the cylinder 66 with the link 73 erected. (See Figure 3 1). Next, air cylinder 6
When the rod 67 of 6 is ejected forward, the pressing piece 6
3 causes the upper sheet of the opening of the bag to slide toward the bottom of the bag by its frictional force, while the upper chuck piece 72 of the chuck body 6 is moved by the force of the spring 74 as the rod 67 moves forward. The user leans forward and grips the sheet below the opening with the lower chuck piece 71 (see FIG. 4). Thereafter, the rod 62 of the air cylinder 61 rises (see FIG. 5).

The bag 91 gripped by the chuck body 7 as described above is subsequently conveyed and brought to the filling section D, and the opening is opened wide by the blower 81.
The contents are filled into the bag by a piston body (not shown).

The operation of each part from the second pinch roll to the filling section described above determines the conveyance speed of the bag as appropriate.
The bag is made without stopping.

〔Effect of the invention〕

As described above, according to the present invention, there is a guide part that guides the continuous bag, a separating part that separates the continuous bag at a perforation, an opening part that widens the opening that is in close contact with each other, and a part that fills the contents. Since the filling section is arranged sequentially in the conveying direction of continuous bags,
Continuous bags can be drawn out from the original fabric and used separately, and once the original fabric is set, many bags can be filled in succession, improving work efficiency. Furthermore, following the separation of continuous bags, opening and filling can be carried out in a series of operations, contributing to shortening of the process.

In addition, the guide section is configured by attaching a position regulating member that contacts the side edge of the continuous bag to a guide roller that guides the feeding of the continuous bag, so that when the first pinch roll is released from the pinch force when the continuous bag is not separated. Since the continuous bag is set to be pushed against the position regulating member by the axial force of the guide roller to correct its position, it is possible to prevent the continuous bag from meandering during the flow of the conveyance operation. Furthermore, since the chuck body is provided on the side of the opening of the bag and is arranged to move in parallel with the bag at the same speed, the bag can be transported to the filling section while being separated. . As a result, the bag is always expanded and filled in a fixed position, so the gripping force during filling is reliably maintained, and as a result, the bag does not come off during filling and cause filling defects, improving reliability. do.

If the gripping force of the chuck body is increased during filling, the chuck can be filled with a strong force, and the filling capacity can be improved.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an apparatus according to an embodiment of the present invention;
Fig. 2 is a perspective view showing the structure of the enlarged opening section, and Figs. 3 to 5 show the operating order of the enlarged opening section in Fig. 2. Each Fig. 1 is a plan view, and each Fig. 2 is a front view. , 6th
This figure is a perspective view showing another original fabric that can be employed in the apparatus of FIG. 1. 3... Guide roller, 32... Position regulating member (regulating roller), 41, 41'... First pinch roll, 42, 42'... Second pinch roll, 6...
Pressing body, 63...Pressing piece, 7...Chick body, 8
1...Air pipe (machine), 9...Continuous bag, 91...Bag,
92... Perforation, A... Guide section, B... Separation section, C... Expanding section, D... Filling section.

Claims (1)

[Scope of Claims] 1. After a continuous bag is formed in which a plurality of bags arranged in a row with the openings facing the sides are successively formed at perforations, each bag is separated at the perforation position, and then the contents are placed in the bag. A guide part that guides the continuous bags, a separating part that separates the continuous bags at perforations, an expanding part that widens the openings that are in close contact with each other, and a filling part that fills the contents. The guide section is arranged in the conveying direction of the continuous bags, and the guide section is made up of a guide roller that guides the feeding of the continuous bags, and a position regulating member that contacts the side edge of the continuous bags is attached, and the separating section is composed of a first pinch roll and a guide roller that guides the feeding of the continuous bags. The second pinch roll has a conveyance speed higher than that of the first pinch roll when continuous bags are separated, and the first pinch roll has a pinch force that increases when continuous bags are not separated. When released, the continuous bag is pushed against the position regulating member by the axial force of the guide roller to correct its position. a chuck body which is located in a horizontal position and moves parallel to the bag at the same speed;
The chuck body has a pressing piece with a coefficient of friction larger than that of the materials of the bag, and the pressing piece moves toward the bottom of the bag while pressing the outer surface near the opening of one sheet of the bag. When moving towards the bottom of the bag,
The filling unit includes a blower pipe that blows air into the opening of the bag in which the other sheet is gripped by the chuck body, and a piston body that fills the bag with contents from the opening. An automatic filling device comprising: 2. The first pinch roll and the second pinch roll in the separating section rotate at the same speed when the bags are not separated, and when the bags are separated, the rotation of the first pinch roll stops for a set time after the sensor detects the perforation. An automatic filling device according to claim 1, characterized in that: 3. The automatic filling device according to claim 1, wherein the chuck body increases the gripping force during filling by the piston body.