JP4730798B2 - Outlet device for back-in box and back-in box - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a back-in box spout device and a back-in box for storing contents such as printing ink.
[0002]
[Prior art]
Recently, a back-in box is often used as a container for storing fluid contents such as ink. This is because the opening of a flexible bag generally called an inner bag is filled with the contents, or a spout for allowing the filled contents to be poured out is provided in an airtight manner. Various structures have been proposed in which the container is stored in the outer box and only the spout is exposed from the outer box.
[0003]
Various proposals have been made regarding caps or valves for opening and closing the spout, but the structure for opening and closing the valve is complicated, and the type using a cap is troublesome to store the cap for reuse. When the back-in box is supported with the spout facing sideways, the contents may leak to the surroundings until the cap is opened and the spout is connected to the supply section.
[0004]
For this reason, a proposal has been made to provide a thin film lid inside the spout to prevent leakage of the contents, and to break through the thin film when a pipe for taking out the contents is fitted into the spout. ing. An example is Japanese Patent Application Laid-Open No. 2000-159258.
[0005]
[Problems to be solved by the invention]
In JP 2000-159258 A, a spout as a spout provided airtightly at the opening of the inner bag is fixed to a female connector having a thin film provided at the center opening, and the male connector is inserted into the female connector. The contents that break through the thin film are described. The spout also describes that a valve that integrally closes the opening of the female connector is formed when the male connector is pulled out even after the thin film has been pierced.
[0006]
However, although a spout corresponding to the spout of the present application does not describe means for fitting a female connector corresponding to an intubation, there is a concern that the female connector may drop off depending on adhesion or the like. However, if it depends on adhesion, the operation becomes complicated, and there is a concern that problems may occur due to the adhesive adhering to other parts carelessly.
[0007]
An object of the present invention is to make it possible to take out contents in a bag without removing a cap, and to facilitate an assembling operation for closing a spout connected to the bag.
[0008]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a spout opening at both ends, which is attached in a sealed state to the opening hole of the bag capable of being filled with the contents, and the front end is slanted when fitted to the inner peripheral surface of the spout outlet in a sealed state. An inner tube that allows insertion of the shaped content outlet, and a first locking portion is formed along the circumferential direction on the inner circumferential surface of the spout, and the inner tube has an outer periphery thereof. A second locking portion that is arranged on the surface along the circumferential direction and elastically locks with the first locking portion, and is provided at one end of the insertion side with respect to the spout, and is connected to the inner intubation tube A lid portion that is pierced and opened when subjected to pressure on the end surface of the content outlet to be inserted, and the region as the lid portion of the inner intubation is outside the end surface of the inner intubation tube Is formed in the direction in which the cut is located, and receives the pressure of the end face of the content outlet that is inserted into the intubation tube. A half-cut portion that promotes breakage of the lid portion is sometimes formed, and the opening edge of the content outlet is in contact with a part of the inner surface side of the lid portion in a state before the breakage with the latest delay. A protrusion having a fixed position is formed .
[0009]
Therefore, after filling the bag with the contents through the spout and inserting the inner tube into the spout, the first locking part and the second locking part are locked together, so the inner tube is fixed to the spout. The spout is closed by the lid portion of the intubation tube. The end surface of the inner intubation is opened because the lid portion is pierced by the content outlet when the content outlet is inserted into the inner intubation. At this time, it is possible to more easily perform an opening operation by cutting the lid when the content outlet is inserted into the inner intubation tube. In addition, the pressure at the content outlet acts on the fragile part of the thin film on the extended surface in the depth direction of the half-cut part, and piercing begins. Is separated from the end face of the intubation tube, the lid portion is easy to break through and the cut surface is clean. Furthermore, when a content outlet having an oblique tip is inserted into the inner intubation, the lid portion of the end surface of the inner intubation is caused by being gradually broken by the content outlet inserted into the inner intubation. When the content take-out port comes into contact with the protrusion connecting the end surface of the cover and a part of the lid, it is possible to open the lid largely outside the content take-out with this last pick.
[0010]
According to a second aspect of the present invention, in the first aspect of the invention, the inner intubation with respect to the spout is brought into contact with an end of the spout at the opening edge of the inner intubation opposite to the lid. An abutting portion that regulates the insertion depth of the spout is formed, and the first locking portion is a first protrusion arranged in a circumferential direction of the spout, and the second locking portion Is a second protrusion that overcomes the first protrusion and abuts against a portion of the first protrusion on the lid side when the inner tube is inserted into the spout.
[0011]
Therefore, the movement of the insertion tube into the spout is restricted by the abutment between the end portion of the spout and the abutment portion, and the intubation tube is prevented from coming off by the contact between the first projection and the second projection. Therefore, the inner intubation can be more securely fixed to the spout.
[0012]
According to a third aspect of the present invention, in the second aspect of the present invention, the contact portion is determined to have a dimension and shape that is supported by a back-in-box holder provided in the printing press.
[0013]
Therefore, the inner intubation and the spout can be supported by the back-in box holder using the contact portion that regulates the insertion depth of the inner intubation with respect to the spout.
[0018]
According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the half-cut portion is formed along an outline of the lid portion.
[0019]
Therefore, the peripheral edge of the lid part after breaking through and the peripheral edge of the opening part where the lid part is opened can be neatly aligned.
[0022]
The invention according to claim 5 is a flexible bag filled with the contents, the back-in-box spout device according to any one of claims 1 to 4 , and the back-in-box spout device. And an outer box for storing the bag with the spout and the inner intubation exposed.
[0023]
Therefore, it is possible to provide a back-in box capable of obtaining the effect of the invention according to any one of claims 1 to 4 .
[0024]
DETAILED DESCRIPTION OF THE INVENTION
A first embodiment of the present invention will be described with reference to FIGS. 1 is a perspective view showing a schematic configuration of a back-in box, FIG. 2 is a cross-sectional view showing a part of the back-in box, FIG. 3 is a cross-sectional view showing a part of the back-in box in an enlarged manner, and FIG. It is sectional drawing which shows the state which expanded a part of box and pierced the cover part.
[0025]
As shown in FIGS. 1 and 2, the back-in box 1 has a paper outer box 2 and a bag 3. The outer box 2 is formed by folding a single blank that has been press-punched into a desired shape with corrugated cardboard or the like, and pasting the necessary portions with an adhesive. Therefore, the front surface and the back surface are formed by overlapping and bonding a plurality of flaps. As shown in FIG. 1, the front face is formed by a plurality of flaps 4-6. Although the back is not shown, it is the same. FIG. 1 shows an open state before the flaps 5 and 6 are bonded together. The inner bag 3 is formed of a flexible resin sheet and is bonded to a part of the front side of the outer box 2.
[0026]
Here, the configuration of the back-in-box spout device A will be described. The back-in-box spout device A includes a spout 7 and an inner intubation 8. The spout 7 is airtightly fitted into the opening hole of the bag 3, and the inner intubation tube 8 is inserted into the spout 7. One end of the spout 7 and the inner tube 8 protrudes from a hole formed in the flap 4. The spout 7 and the inner tube 8 are formed of a material such as ethylene vinyl acetate copolymer (EVA) resin, low density polyethylene (LDPE), high density polyethylene (HDPE), or linear low density polyethylene (LLDPE). Yes.
[0027]
As shown in FIG. 3, the spout 7 has a cylindrical shape with both ends opened, and one end thereof is formed with an annular protruding piece 9 fixed to the inner surface of the bag 3, and the inner peripheral surface has a circumferential direction. A first protrusion 10 as a first locking portion is integrally formed along the same. A second protrusion 11 as a second engaging portion is integrally formed along the circumferential direction on the outer peripheral surface of the inner tube 8 so as to engage with the first protrusion 10. The cross-sectional shape of the first and second protrusions 10 and 11 is set to a substantially semicircle. Further, a lid portion 12 is formed at one end of the inner intubation tube 8, and the insertion depth of the inner intubation tube 8 with respect to the spout port 7 is regulated by contacting the end portion of the spout port 7 at the opening edge 13 at the other end. A flange 14 as a contact portion is formed. In this example, the outer peripheral surface of the inner intubation tube 8 has a tapered shape so that the outer diameter gradually becomes thinner toward the lid portion 12, so that the outer diameter of the inner intubation tube 8 is tightly fitted to the spout 7 at a portion having a larger outer diameter. It is configured. Of course, an annular rib may be formed on the outer peripheral surface of the inner tube 8 to improve the airtightness with the exhaust port 7. Further, a half cut portion 15 is formed on the end surface of the inner intubation 8 on the lid portion 12 side. The half cut portion 15 is formed in a direction in which a cut is located outside the end surface of the inner intubation tube 8, and is formed along the outline of the circular lid portion 12. The half-cut portion 15 may be formed intermittently like a perforation, but in this example, it is formed by a single continuous line. Furthermore, the protrusion 16 is located at a position where it is finally brought into contact with the peripheral edge of the content outlet 20 inserted into the inner intubation tube 8 on a part of the inner surface side of the lid 12 before being pierced by the half cut portion 15. Is formed.
[0028]
The back-in box 1 in the present embodiment is used for supplying ink to a printing machine (not shown), and therefore, the bag 3 contains ink as contents. The printing machine includes a back-in box holder (not shown) that detachably supports the back-in box 1 and an ink pump (not shown) that feeds the ink in the bag 3 to the ink supply unit. The content outlet 20 is provided in the back-in box holder and connected to the ink pump. In the present embodiment, the flange 14 of the intubation tube 8 is determined to have a dimensional shape that is positioned and supported by the back-in box holder. Since the content outlet 20 is fixedly provided, the fixed content outlet 20 is relatively inserted into the intubation tube 8 when the back-in box 1 is mounted on the back-in box holder. .
[0029]
As shown in FIGS. 3 and 4, the content outlet 20 has a pipe shape inserted into the inner intubation 8. It is desirable that the clearance between both the fitting portions be as small as possible in order to improve the sealing performance for preventing the leakage of ink in the bag 3. In this example, since the annular rib 21 that supports the flange 14 of the inner intubation tube 8 is formed on the outer periphery of the content outlet 20, the effect of improving the sealing performance can be expected. The content outlet 20 is inclined obliquely so that the opening shape of the end surface becomes an elliptical shape so that the lid 12 can be easily broken when inserted into the inner intubation tube 8. A sharp tip 22 is formed.
[0030]
In such a configuration, how to use the back-in box 1 will be described. When filling the bag 3 with ink, it is performed through the spout 7 in a state before the inner intubation tube 8 is inserted into the spout 7. After ink filling, the inner intubation tube 8 is inserted into the spout 7. In this insertion process, the spout 7 and the inner intubation 8 are deformed by their own elasticity and allow the second protrusion 11 to get over the first protrusion 10. The insertion depth of the inner intubation tube 8 with respect to the spout 7 is regulated by the contact between the flange 14 and the end of the spout 7. The restricted insertion depth is an insertion depth at which the second protrusion 11 exceeds the top of the first protrusion 10 but elastically presses against each other. Thereby, the inner intubation tube 8 can be fixedly and easily fitted to the spout 7 without depending on the bonding work or the like.
[0031]
Next, the back-in box 1 filled with ink is mounted on the back-in box holder of the printing press. At this time, the mounting position of the back-in box 1 is such that the protrusion 16 formed on a part of the inner surface of the lid portion 12 faces a portion 23 that is 180 degrees away from the pointed end portion 22 of the content outlet 20. Determined. With this attachment, the content outlet 20 is relatively inserted into the inner intubation 8. Since the content outlet 20 has an oblique tip and further has a pointed end portion 22, the pointed end portion 22 comes into contact with the end surface of the inner intubation tube 8 first and breaks through the lid portion 12. The lid portion 12 is caused by being pierced by the content outlet 20 little by little, but the portion 23 of the content outlet 20 is finally connected to the protrusion 16 connecting the end surface of the inner intubation 8 and a part of the lid portion 12. The lid 12 can be greatly opened to the outside of the content outlet 20 with this last pick. Therefore, when the ink pump is driven, the lid 12 does not hinder the flow of ink from the bag 3 to the printing machine. Since the bag 3 contracts due to negative pressure as the ink is sucked by the suction force of the ink pump, if a protrusion such as a rib is formed on the protruding piece 9 of the spout 7, the inner surface of the bag 3 is formed on the protruding piece 9. Can be avoided. Thereby, it can be expected that a small amount of ink adhering to the inner surface of the bag 3 is sucked to the end.
[0032]
In the present embodiment, the half cut portion 15 is formed in a direction in which a cut is located outside the end face of the inner intubation tube 8. Therefore, the pressure of the content outlet 20 acts on the weak portion of the thin film on the extended surface in the depth direction of the half cut portion 15 to start cutting, and after the weak portion is cut, the half cut portion 15 Since the lid portion 12 is separated from the end surface of the inner intubation 8, the lid portion 12 is easy to break through and the cut surface is clean. When forming the half cut portion 15 along the outline of the lid portion 12, forming the half cut portion 15 on the extended surface of the inner peripheral surface of the inner tube 8 that is substantially equal to the outer diameter 2 of the content outlet 20. However, it is the best in cleaning the outline of the lid portion 12 that breaks through and the peripheral edge of the opening that is opened by breaking through the lid portion 12.
[0033]
In the present embodiment, the half cut portion 15 is formed in order to promote the action of breaking through the end face of the inner intubation tube 8 with the content outlet 20, but the half cut portion 15 is formed by making the end face of the inner intubation tube 8 thin. The lid 12 can be pierced even without forming.
[0034]
Further, even when the half-cut portion 15 is formed, the pattern is not limited to the pattern formed along the outline of the lid portion 12, and the half-cut portion is formed in a pattern that radially divides the region of the lid portion 12 into a plurality of cut pieces. It may be formed.
[0035]
Next, a second embodiment of the present invention will be described with reference to FIGS. The same parts as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. FIG. 5 is a cross-sectional view showing a part of the back-in box in an enlarged manner, and FIG. 6 is a cross-sectional view showing a state in which a part of the back-in box is enlarged and the cover part is broken through.
[0036]
In the content outlet 20 in the present embodiment, two pointed portions 22 are formed at the opening edge of the tip with an interval of 180 °. For this reason, two protrusions 16 are formed on the inner surface side of the lid portion 12 of the intubation tube 8 by changing the position by 90 ° with respect to the tip portion 22. And the half cut part 15 is formed in the position which opposes the straight line which connects the two pointed parts 22 other than being formed along the peripheral edge of the cover part 12 on the extension surface of the inner peripheral surface of the intubation tube 8. Yes.
[0037]
In such a configuration, when the back-in box 1 filled with ink is mounted on the back-in box holder of the printing press, the protrusions 16 formed on a part of the inner surface of the lid 12 are formed on the contents outlet 20. The mounting position of the back-in box 1 is determined so as to face the portions 23 that are 90 ° apart from the two pointed portions 22. With this attachment, the content outlet 20 is relatively inserted into the inner intubation 8. In the content outlet 20, the tip portions 22 arranged at two locations on the opening edge of the content outlet 20 come into contact with the end surface of the inner intubation tube 8 first and break through the lid portion 12. The half-cut portion formed on the straight line connecting 22 is pierced, and then the half-cut portion 15 along the periphery of the lid portion 12 is breached, so that the lid portion 12 is bisected and raised as shown in FIG. However, when the portion 23 of the content outlet 20 finally comes into contact with the protrusion 16 connecting the end face of the inner intubation 8 and a part of the lid portion 12, the last outlet of the content outlet 20 The lid 12 can be greatly opened outward. Therefore, when the ink pump is driven, the lid 12 does not hinder the flow of ink from the bag 3 to the printing machine.
[0038]
【The invention's effect】
According to the first aspect of the present invention , after the bag is filled with the contents through the spout, the first and second engaging portions can be locked by a simple operation of inserting the intubation tube into the spout. Thus, the inner intubation tube can be fixedly fitted to the spout, and the lid portion of the inner intubation tube can be pierced by inserting the content outlet into the inner intubation tube. In the region as the lid portion of the intubation, a half-cut portion that promotes the breakage of the lid when receiving the pressure of the end face of the content outlet inserted into the intubation tube is formed. Opening work by cutting the lid when the content outlet is inserted can be performed more easily. Since the half cut part is formed in the direction where the cut is located outside the end face of the intubation tube, the pressure at the content outlet acts on the weak part of the thin film on the extended surface in the depth direction of the half cut part. After the piercing starts and the fragile portion is pierced, the lid is separated from the end face of the intubation tube by the half cut portion, so that the lid is easily pierced and the cut surface is clean. Since a part of the inner surface side of the lid part in the state before piercing is formed with a protrusion whose position is determined so that the opening edge of the content take-out port with an oblique shape comes into contact with the latest delay, When a content outlet with a slanted tip is inserted into the intubation tube, the end of the end tube of the intubation is caused by being gradually broken by the content outlet port inserted into the intubation tube. When the content takeout port finally comes into contact with the protrusion connecting a part of the lid portion, the lid portion can be greatly opened to the outside of the content takeout port by this last stroke. Therefore, the opened lid does not obstruct the flow of contents from the bag to the contents outlet.
[0039]
The invention according to claim 2 is the invention according to claim 1, wherein the insertion depth of the intubation tube with respect to the spout is set by contacting the end of the spout at the opening edge opposite to the lid portion of the intubation. A restricting contact portion is formed, the first locking portion is a first protrusion arranged along the circumferential direction of the spout, and the second locking portion is an intubation tube to the spout Is the second protrusion that gets over the first protrusion when it is inserted and abuts against the portion of the first protrusion on the lid side. Since the movement of the inner intubation in the insertion direction is restricted and the inner intubation can be prevented from coming off by contact between the first protrusion and the second protrusion, the inner intubation can be more securely fixed to the spout.
[0040]
According to a third aspect of the present invention, in the second aspect of the present invention, since the abutment portion is sized and shaped to be supported by a back-in box holder provided in the printing press, the intubation with respect to the spout The inner intubation and the spout can be supported by the back-in box holder using a contact portion that restricts the insertion depth of the inner tube.
[0043]
The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the half-cut portion is formed along the outline of the lid portion. It is possible to cleanly align the periphery of the opening that has opened.
[0045]
According to a fifth aspect of the present invention, there is provided a flexible bag filled with the contents, the back-in-box spout device according to any one of claims 1 to 4 , and the back-in-box spout device. Since it has the outer box which accommodates a bag in the state which exposed the spout and the inner intubation, the back-in box which can acquire the effect by the invention as described in any one of Claim 1 thru | or 4 can be provided.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a schematic configuration of a back-in box according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a part of a back-in box.
FIG. 3 is an enlarged cross-sectional view showing a part of a back-in box.
FIG. 4 is a cross-sectional view showing a state in which a part of the back-in box is enlarged and a cover part is broken through.
FIG. 5 is an enlarged sectional view showing a part of a back-in box according to the second embodiment of the present invention.
FIG. 6 is a cross-sectional view showing a state in which a part of the back-in box is enlarged and a cover part is broken through.
[Explanation of symbols]
2 Outer box 3 Bag 7 Spout 8 Inner tube 10 First locking part, first protrusion 11 Second locking part, second protrusion 12 Lid part 13 Opening edge 14 Contact part 15 Half cut part 16 Projection A Outlet device for back-in box

Claims (5)

Inserting a spout at both ends that are attached in a sealed state into the opening hole of the bag that can be filled with the contents, and a content outlet having a slanted tip at the time of use, fitted in a sealed state on the inner peripheral surface of the spout With intubation that allows
A first locking portion is formed along the circumferential direction on the inner peripheral surface of the spout,
The inner intubation has a second locking portion that is arranged on the outer peripheral surface along the circumferential direction and elastically locks with the first locking portion, and one end on the insertion side with respect to the spout A lid that is pierced and opened when subjected to the pressure of the end face of the content outlet that is provided in and inserted into the inner intubation ,
When the pressure on the end face of the content outlet is formed in the region as the lid portion of the intubation in a direction in which a cut is located outside the end surface of the intubation and is inserted into the intubation A half cut part is formed to promote the breakage of the lid part,
In a part on the inner surface side of the lid portion in a state before piercing, a protruding portion whose position is determined so that the opening edge of the content outlet is in contact with the latest is formed.
A spout device for a back-in box.   A contact portion that regulates an insertion depth of the inner intubation tube with respect to the spout is formed at the opening edge of the inner intubation opposite to the lid portion by contacting the end of the spout. The one locking part is a first protrusion arranged along the circumferential direction of the spout, and the second locking part is the first protrusion when the inner tube is inserted into the spout. 2. The back-in-box spout device according to claim 1, wherein the second protrusion is a second protrusion that climbs over the protrusion of the first protrusion and contacts the portion of the first protrusion on the lid portion side.   3. The back-in-box spout device according to claim 2, wherein the contact portion is defined in a size and shape that is supported by a back-in box holder provided in a printing press. The back-in-box spout device according to any one of claims 1 to 3, wherein the half-cut portion is formed along an outline of the lid portion. A flexible bag filled with contents;
The back-in-box spout device according to any one of claims 1 to 4 ,
An outer box for storing the bag with the spout and the inner intubation of the back-in-box spout device exposed;
A back-in box.

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