JP4107013B2 - Aperture assist device - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to an apparatus for manufacturing a container such as an infusion bag or a standing pouch by making two films into a bag shape, and in particular, in order to separate and open the openings of two stacked films. The present invention relates to an opening assisting device that facilitates opening by attaching a crease to a part in advance.
[0002]
[Prior art]
When a bag-like container is manufactured by stacking two resin films, the periphery of the two stacked films is adhered and left unsealed so that it can be opened. The opening is widened to fill the liquid, and a stopper for taking out the liquid from the completed container is welded.
[0003]
In order to carry out operations such as filling a film formed into a bag shape by overlapping two sheets as described above or welding a stopper, an opening which is an unbonded portion of two films is formed. It is necessary to spread. In such a case, conventionally, a pair of vacuum pads adsorbed two films from both sides, and these vacuum pads were retracted and separated from each other to widen the opening of the bag-like film. .
[0004]
However, the two overlapped films used for containers such as infusion bags are in close contact with each other because there is no air inside (between the two films), and they are relatively thick and rigid. Furthermore, since the size of the opening portion is small with respect to the overall size of the container, it is difficult to spread the two films with only the vacuum pad. Therefore, an apparatus for opening a part of the bag-like film by opening a part of the bag-like film so that a plug or the like can be easily inserted has already been proposed (Japanese Patent Laid-Open No. 2000-313076, JP 2000-293798).
[0005]
In the apparatus disclosed in the first publication (Japanese Patent Laid-Open No. 2000-313076), as the film progresses, the cutter cuts the edge on one side of the film, and then between the mating surfaces of the film cut by the cutter An opening plate is inserted into the.
[0006]
Further, the device described in the second publication (Japanese Patent Laid-Open No. 2000-293798) has a bifurcated claw in which a means for attaching a crease (in this publication, a spreading habit imparting means) forms a pair of upper and lower sides, The claw portions of the bifurcated claws are shifted so as to enter between the claw portions of the other bifurcated claws. After these two claws are inserted into each other, the claws are closed and the films are grasped from each other.
[0007]
[Problems to be solved by the invention]
In the configuration of the invention described in the first publication, the cutter is inserted into the end portion of the film and then opened by the opening member. However, the thickness of the film is about 0.2 mm and is stable. Therefore, it is difficult to put a cutter between the films. Further, when a part of the film is cut by the cutter and enters the inside, there is a problem that foreign matters are mixed and it is not preferable.
[0008]
In the configuration of the invention described in the second publication, an opening / closing mechanism / moving mechanism for a gripper (bifurcated claw) is required, and the mechanism is complicated. In addition, since the film itself is smooth and has a small coefficient of friction, there is a possibility that the film may not be gripped well by the nail portion, resulting in a lack of stability.
[0009]
The present invention has been made to solve the above-described problems, and an object thereof is to provide an opening assisting device that can reliably open a bag-like film with a simple configuration.
[0010]
[Means for Solving the Problems]
The opening assisting device according to the present invention comprises:
Preliminarily opening the opening of a bag-shaped container made of two films, and a pressing part that presses the surface of one film and a rear surface of the pressing part, and a gap is formed, and the pressing part an aperture member having an insertion piece from the bottom is also a film one sheet bottom downward position, moving means for advancing and retreating toward the opening member to the opening of the container, the inserted between two films A pressing member that presses a portion located in the vicinity of the insertion piece; and an advancing / retreating unit that moves the pressing member forward and backward toward the opening of the container, while pressing the surface of one film by the pressing portion. After inserting the insertion piece between the two films by advancing the opening member, the pressing member is advanced to press the vicinity of the insertion piece of the film to crease it. It is obtained by the.
[0011]
In the opening assisting device according to the invention, first, when the upper surface of the two films is pressed by the pressing portion of the opening member and then the opening member is advanced, the insertion piece is placed between the first and second films. Inserted. Since the bottom surface of the insertion piece is higher than the bottom surface of the holding portion by one film, the insertion piece is smoothly inserted between the first and second films. Thereafter, when the pressing member is lowered, the pressing member presses the film located on both sides of the insertion piece. Then, the folds are attached to the upper film of the two films by the insertion piece of the opening member and the pressing member, and then when opening by the opening means such as a vacuum pad, it is extremely easy and reliable. It becomes possible to open.
[0012]
According to a second aspect of the present invention, an air passage is provided in the insertion piece, and the insertion piece is inserted into the film to inject air.
[0013]
In the second aspect of the invention, the upper film is creased and air is blown between the upper and lower films to open the opening of the container made of these films more easily and reliably. It becomes possible.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to embodiments shown in the drawings. FIG. 1 is a front view of an opening assisting device according to an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIGS. 3A to 3C are side views for sequentially explaining the operation of the opening assisting device. . This opening assist device is provided as a part of a manufacturing apparatus such as an infusion bag that overlaps two films to form a bag-like container and is filled with a liquid. After preliminarily opening the opening of the container, the container is largely opened by an opening means such as a vacuum pad, and filling of the liquid or attachment of a stopper for taking out the liquid inside the container after completion is performed.
[0015]
Two films 4 and 6 (see FIG. 3) are overlapped and the periphery thereof is welded to form a bag-like container 2. In this embodiment, as shown by reference numeral 2A in FIG. 2, the container 2 has a rectangular side 3a 2a, 2b, 2c welded with substantially the same width, and has a side 2d (see FIG. 2) having an opening 2da. In the lower side), both sides 2db are welded with a wide width, and the outer side 2dc of the central opening 2da is welded with a narrow width.
The bag-like container 2 is placed on two parallel support rails 8 and 10, and from the position (first position P1) of the container (2A) before cutting to the next second position P2. Be transported. In this second position P2, an opening assist device (indicated by reference numeral 1 as a whole) according to an embodiment of the present invention is arranged. The opening assisting device 1 is installed on the opening 2da side (lower side in FIG. 2) of the container 2 placed on the support rails 8 and 10.
[0017]
The opening assisting device 1 includes a horizontal cylinder (moving means) 12 and an opening member 14 that is fixed to a piston rod 12a of the cylinder 12 and moves forward and backward in the direction of the opening 2da of the container 2. As shown in FIGS. 3 and 4, the opening member 14 is formed with a pressing portion 14 a for pressing the upper surfaces of the two films 4 and 6 forming the container 2 on the front side (the left side in the figure, that is, the container 2 side). On the rear side thereof, an insertion piece 14b to be inserted between the upper and lower films 4 and 6 of the opening 2da of the container 2 is provided. The pressing portion 14a is provided on the lower surface on the front side of the flat upper plate 14c, and the insertion piece 14b is fixed to the lower surface on the rear side of the upper plate 14c and extends in the direction of the pressing portion 14a. A gap is formed between the rear surface of the pressing portion 14a and the distal end surface 14ba of the insertion piece 14b.
[0018]
As will be described later, the holding portion 14a of the opening member 14 is formed with an inclined surface 14aa on the upstream side so that the container 2 can smoothly enter the lower surface side when the container 2 is conveyed. ing. And the level | step difference is provided so that the bottom face (lower surface of the lowest part) of this holding | suppressing part 14a may become a position higher by the thickness of the films 4 and 6 than the bottom face of the insertion piece 14b. Moreover, as shown in FIG. 2, the holding | maintenance part 14a has a wide width | variety close | similar to the width | variety of opening part 2da of the container 2, On the other hand, the insertion piece 14b has a very thin width | variety. Further, the distal end surface 14ba of the insertion piece 14b has a smooth curved surface so that it can be smoothly inserted between the upper and lower two films 4 and 6. Further, the upper plate 14c is formed with a hole 14d penetrating vertically in a portion located above the insertion piece 14b (see FIGS. 2, 3 and 4).
[0019]
A pressing member 16 is provided above the opening member 14. This pressing member 16 is fixed to a piston rod 18a of a cylinder (elevating means) 18 arranged in the vertical direction, and by the operation of this vertical cylinder 18, it moves up and down toward the opening 2da of the container 2 stopped downward. To do. The pressing member 16 has a size that can pass through a through hole 14 d formed in the upper plate 14 c of the opening member 14. In addition, a recess 16a slightly larger than the size of the insertion piece 14b is formed on the lower end surface of the pressing member 16 so as not to interfere with the insertion piece 14b of the opening member 14 when lowered (see FIG. 1).
[0020]
When the opening member 14 moves forward due to the operation of the horizontal cylinder 12, the opening piece 14b moves forward to a position where the insertion piece 14b enters the opening 2da of the container 2 stopped at the second position P2 (see FIG. 3B). ). Further, when the vertical cylinder 18 is extended, the pressing member 16 passes through the through hole 14d of the opening member 14, and the recess 16a formed on the lower end surface is fitted into the insertion piece 14b of the opening member 14 from above. (See FIG. 3C).
[0021]
A cutting device 20 is provided below the opening assisting device 1 for cutting the end portion (lower end portion in FIG. 2) of the portion where the opening 2da of the container 2 is provided. An elevating cylinder 20b is fixed on a base 20a installed below a position where the opening assisting device 1 is provided, and a rodless cylinder 20c is fixed on a rod 20ba of the elevating cylinder 20b. The cutter 20d for cutting the container 2 moves forward and backward along the support rails 8 and 10 by the rodless cylinder 20c.
[0022]
By the movement of the cutter 20d, the end of the container 2 on the side having the opening 2da is cut. In the state before the container 2 is sent to the second position P2 where the cutting device 20 is provided, the end 2dc on the side having the opening 2da is bonded and the inside of the container 2 is sealed (see FIG. 2), after the end on the opening 2da side is cut by the cutter 20d, the inlet side of the opening 2da is not bonded and can be expanded (right side in FIG. 2). Container 2B).
[0023]
The operation of the opening assisting device 1 according to the above configuration will be described. The bag-like container 2 composed of the two films 4 and 6 is transported from the first position P1 on the upstream side to the second position P2 in a state where all of the four sides 2a, 2b, 2c, and 2d are adhered, and stops. . In the pressing portion 14a of the opening member 1, the surface on the side where the container 2 is conveyed (the left surface in FIG. 2) is an inclined surface 14aa, and the end of the container 2 is smoothly on the lower surface of the pressing portion 14a. Can get in. The inclined surface 14aa may be formed not only on one side of the pressing portion 14a but also on both sides.
[0024]
When the container 2 has been transported to the second position P2, the opening member 14 of the opening assisting device 1 has a pressing portion 14a on the distal end side that opens the container 2, as shown in FIGS. It is located above the part 2da. 2 and FIG. 3 (A) already show the state in which the opening 2da side end of the container 2 has been cut, but when the container 2 has been transported to the second position P2, the container 2 As shown on the left side of FIG. 2 (see the container indicated by reference numeral 2A), the end 2dc side of the opening 2da is bonded and sealed.
[0025]
When the container 2 is transported to the second position P2 and stopped as described above, first, the cutting device 20 is activated. At the time when the container 2 is carried into the second position P2, the lifting cylinder 20b of the cutting device 20 lowers the rodless cylinder 20c so that the cutter 20d is not in contact with the container 2, and the rodless cylinder 20c The cutter 20d has moved to the left side of FIG. When the container 2 is conveyed in this state, the cutter 20d is lifted by the operation of the elevating cylinder 20b and then moved from the left to the right in FIG. The end on the 2da side is cut. The container 2 whose end on the opening 2da side has been cut is changed from the left side (2A) to the right side (2B) in FIG. In this way, the opening 2da of the container 2 can be opened by cutting the bonding portion 2dc at the tip of the opening 2da side of the container 2. Note that when cutting with the cutter 20d, the upper surface of the container 2 is pressed by the pressing portion 14a of the opening assisting device 1.
[0026]
Subsequently, the opening assisting device 1 operates. The opening assisting device 1 first advances the opening member 14 by the operation of the horizontal cylinder 12. The opening member 14 is such that the bottom surface of the pressing portion 14a holding the upper surface of the container 2 is positioned higher by one film thickness than the bottom surface of the insertion piece 14b on the rear side (right side in FIG. 3). When the member 14 moves forward, the pressing portion 14a moves while holding the upper surface of the upper film 4, and the insertion piece 14b has the lower surface at the intermediate height between the two films 4 and 6, so It is inserted between the films 4 and 6 (see FIG. 3B). In a position where the opening member 14 is stopped in a state where the insertion piece 14b is inserted between the upper and lower films 4 and 6, the through hole 14d formed in the upper plate 14c is located immediately below the pressing member 16. .
[0027]
As described above, when the opening member 14 is advanced by the operation of the horizontal cylinder 12 and the insertion piece 14b is inserted between the two films 4 and 6, the upper vertical cylinder 18 is subsequently operated to press the pressing member. 16 is lowered. The pressing member 16 has a tip (lower end) that passes through a through hole 14d formed in the upper plate 14c of the opening member 14 and is pressed against the opening 2da of the container 2 positioned below (FIG. 3). (See (C)). A concave portion 16a is formed on the lower end surface of the pressing member 16, and the concave portion 16a is fitted to the outside of the insertion piece 14b so as to press both sides of the portion of the film 4 where the insertion piece 14b is inserted. Thus, by pressing both sides of the insertion piece 14b of the upper film 4 with the pressing member 16, a crease along the insertion piece 14b of the opening member 14 can be attached to the upper film 4. Therefore, a gap is formed between the upper film 4 and the lower film 6 that are creased when opened by an opening means (not shown) such as a vacuum pad. And it can open reliably.
[0028]
FIG. 5 is a view showing another example of the opening member of the opening assisting device 1. The opening member 114 has the same basic shape as the opening member 14 of the first embodiment. In the example, an air passage 114bb is formed inside the insertion piece 114b, and the air passage 114bb opens at the tip end surface 114ba of the insertion piece 114b. Similarly to the opening member 14 of the above-described embodiment, the opening member 114 is also advanced by the operation of the horizontal cylinder 12, thereby inserting the tip of the insertion piece 114 b between the two films 4 and 6 of the container 2. be able to.
[0029]
Then, air is supplied from the air passage 114 bb with the insertion piece 114 b inserted between the two films 4 and 6. The air blown out from the air passage 114bb enters the gap between the upper and lower films 4, 6 and pushes and opens the two films 4, 6 from the inside, so that the opening 2da of the container 2 can be more reliably opened. it can.
[0030]
In the above-described embodiment, the opening member 14 is moved in the horizontal direction and the insertion piece 14b is inserted from the side of the films 4 and 6 and then pressed from above by the pressing member 16. The moving direction of the member 14 and the pressing member 16 is not limited to the above direction. For example, an opening assisting device is disposed upside down from the above embodiment, and the pressing member is raised from below to press the film. Alternatively, the opening assisting device may be arranged vertically and inserted into the film conveyed in an upright state.
[0031]
【The invention's effect】
As described above, according to the present invention, in the opening auxiliary device that preliminarily opens the opening of the bag-shaped container made of two films, the pressing portion that presses the surface of one film and the rear surface and the gap between the pressing portions. And an opening member having an insertion piece whose bottom surface is positioned one sheet below the bottom surface of the pressing portion, and a moving means for moving the opening member forward and backward toward the opening of the container. A pressing member that presses a portion located between the two pieces of film inserted between the two films, and an advancing / retreating unit that moves the pressing member forward and backward toward the opening of the container, The insert member is inserted between the two films by advancing the opening member while holding the surface of one film by, and then the pressing member is advanced to the vicinity of the insert piece of the film. Since to give the habit folding by pressing, the openings of the bag-like container made two films, with a simple structure, it can be easily and reliably opened.
[0032]
In the invention according to claim 2, since an air passage is provided in the insertion piece, and the insertion piece is inserted into the film and air is jetted, the opening of the container can be more easily and reliably performed. Can be opened.
[Brief description of the drawings]
FIG. 1 is a front view of an opening assisting device according to an embodiment of the present invention.
FIG. 2 is a plan view of the opening assisting device.
FIGS. 3A to 3C are diagrams for sequentially explaining the operation of the opening assisting device. FIG.
FIG. 4 is an enlarged side view showing an opening member of the opening assisting device.
FIG. 5 is a side view showing another example of the opening member.
[Explanation of symbols]
2 Container 2da Container opening 4 Film (upper film)
6 Film (lower film)
12 Moving means (horizontal cylinder)
14 Opening member 14a Holding part 14b Insertion piece 16 Pressing member 18 Lifting means (vertical cylinder)
114 Opening member 114bb Air passage

Claims (2)

In the opening auxiliary device that pre-opens the opening of the bag-like container made of two films,
An opening member having a pressing part that presses the surface of one film and an insertion piece that is disposed with a gap formed between the rear surface of the pressing part and the bottom surface of the pressing part is positioned below the bottom surface of the pressing part, and A moving means for moving the opening member forward and backward toward the opening of the container, a pressing member for pressing a portion located near the insertion piece inserted between two films, and the pressing member for opening the container Advancing / retreating means for advancing / retreating toward the part ,
The insertion member is inserted between two films by advancing the opening member while pressing the surface of one film by the pressing unit, and then the pressing member is advanced to press the vicinity of the insertion piece of the film. An opening assisting device characterized by attaching a crease.   The opening assisting device according to claim 1, wherein an air passage is provided in the insertion piece, and the insertion piece is inserted into the film to inject air.

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