JP6032663B2 - Flexible packaging bag and discharge device for flexible packaging bag - Google Patents

Description

  The present invention relates to a soft packaging bag for storing and packaging a viscous liquid such as a caulking agent (sealing agent) or an adhesive, and a discharge device (caulking gun) for the soft packaging bag.

  Since the implementation of the Container Recycling Law, pouches with clamp caps for soft packaging bags in volume-reduced containers, so-called spout pouches, etc., are remarkable as refill containers with the goal of reducing the amount of resin used by each bag manufacturer. Although it is expanding, it is also limited to the fields of food, daily necessities, cosmetics and medical products, and there is almost no progress in the industrial field.

  Looking at the production trend of building sealants (caulking agents), there has been a downward trend since 2008, and major bag manufacturers in the fields of food, daily necessities, cosmetics and medical products have also invested billions of dollars. Since it becomes a unit, it is inferred that it is difficult to reach out.

In this situation, the reason for no further development is that the flexible packaging bag is suitable for caulking agents (sealing agents), adhesives, etc., which are mainly viscous liquids for building materials, and the discharge for the flexible packaging bag. It is thought that there is no device (caulking gun).
Technically, if it is just a three-way seal bag, it can be produced by the current bag manufacturer, and if it is just a caulking gun, it can be produced by the current machine manufacturer.

Considering the existence of current cylindrical containers (cartridges) and caulking guns, the pair is the first to produce value, and there is no value alone.
However, many manufacturers have filed applications from their respective fields, but only applications from different areas have been completed.
In this case, it has been difficult to imagine the development of a soft packaging bag that is inexpensive and has a volume reduction as garbage in the industrial field.

Considering the characteristics of flexible packaging bags, there are various advantages, among them, the flexibility is raised.
However, this point also has great difficulty in the soft packaging bag when the stored soft packaging bag is loaded into the caulking gun and the flexible packaging bag when the viscous liquid is filled. ing.
Regarding such soft packaging bags and caulking guns, there are inventions described in Patent Document 1 and Patent Document 2, but these can be accurately loaded (centered) when the soft packaging bags are actually loaded into the caulking gun. It was difficult.

Moreover, the heat sealing process of the fastener part after viscous liquid filling had the following problems.
i) It is difficult to load the soft packaging bag into the squeezing device.
ii) The flexible packaging bag is twisted, and the soft packaging bag is wrinkled.
iii) The dead space of the heat-sealed part of the flexible packaging bag is too wide.
iv) It is difficult to heat seal the fastener (to prevent air leakage).
v) It is difficult to process and process the exhaust port when a zipper is provided on the flexible packaging bag.
vi) It is difficult to heat seal the glue margin of the fastener.
vii) Filling takes too much time at an exhaust port that does not leak the contents completely.
Therefore, development of flexible packaging bags and caulking guns that can solve these problems has been demanded.

Japanese Patent No. 4251659 Japanese Patent No. 4435852

  The problem to be solved by the invention according to the present application is to clarify the loading position of the soft packaging bag to the caulking gun, and at the same time, keep the direction of travel of the squeezing mechanism parallel to the soft packaging bag, and It is to reduce the dead space of the flexible packaging bag, facilitate heat processing, and further reduce the filling time.

The present invention provides the following inventions.
(1) A squeezing device for squeezing a viscous liquid from a soft packaging bag containing the viscous liquid, wherein the squeezing device is provided with at least one hook in the holding portion of the soft packaging bag. .

  At least one hook is provided, and in the case of one hook, it is installed at the central portion of the clamping portion. Thereby, it has the effect that a packaging bag and the front body of a squeezing apparatus can take perpendicularity. Preferably, in addition to the central one, two or more hooks that allow the packaging bag and the front body of the squeezing device to be vertical may be provided on both sides thereof. The number of hooks is most preferably three, but one or two hooks are installed only on one side, and a total of two (center + left or right one) or three (center + two in either one) Book) or four (center + one on each side + one on either side) or the like. In short, it is only necessary to be able to take centering when loading the bag into the squeezing device, to suspend the bag in the vertical direction, and to load the bag in parallel with the surface on which the rollers of the squeezing device move.

One in the center bends in an L shape and faces in a direction parallel to the installation surface of the squeezing device. The hooks other than the center may be L-shaped.
Further, the hooks may be symmetrical and may be two, four, or plural. In this case, the operability is deteriorated, but the bag and the squeezing device are kept parallel when they are hooked on the two hooks at symmetrical positions.

  Further, when the bag is filled with the contents, the bag swells up and down and contracts in the longitudinal direction. However, it elongates in the longitudinal direction as the contents are released by the squeezing mechanism. Therefore, the nozzle attached to the tip of the bag is not fixed to the tip of the squeezing device, but a hole for guiding the nozzle in a direction perpendicular to the nozzle is provided so that it can freely move in the longitudinal direction. Thereby, even if the contents are pushed out and the bag extends in the longitudinal direction, the contents can be pushed out without any trouble. If the tip is fixed, the bag extends in the longitudinal direction as the contents are pushed out, and the contents may remain due to wrinkling on the way.

(2) The flexible packaging bag for viscous liquid, wherein at least one hook hole is provided at a rear end portion of the flexible packaging bag.
When the packaging bag for viscous liquids is loaded into the squeezing device, the device is heavy (the grip is at the trailing edge and the front part is heavy). Cheap. Therefore, the device is oriented vertically, the viscous liquid packaging bag is suspended, and the device and the bag are substantially parallel to each other, and then fixed by a grip (clamping) holding portion (material). Thereby, it has the effect that a bag is loaded diagonally and wrinkles do not approach and all the liquid can be squeezed out. Here, the rear end portion refers to a portion entering inside from the rear end (see FIG. 1). There is a portion to be heat-sealed after filling between the rear end and the rear end.

  (3) The flexible packaging bag according to (2), wherein the injection part has an internal screw.

(4) In the flexible packaging bag of (2) or (3), the bottom of the flexible packaging bag is rectangular, and the lower side thereof is directed from both sides to the center, and the central portion is subjected to an open sealing process. Soft packaging bag characterized by
When the rectangle and its lower seal are 1/4 gallon (1/3 liter) size, for example, the rectangle seal is vertical 19 mm to 25 mm x horizontal 78 mm to 96 mm, clearance between both sides 1 mm, small seal: vertical 3 mm ˜5 mm × width 39 mm to 48 mm A center gap of 1 mm to 5 mm is preferably used, but is not limited thereto. In short, it is sufficient that the rectangular seal portion has a clearance that provides sufficient strength to install the hook hole and that can provide a sufficient filling speed during liquid filling.

  (5) The flexible packaging bag according to any one of (2) to (4), wherein the flexible packaging bag has an exhaust port, and the width of the exhaust port is 400 μm ≦ W ≦ 2000 μm Bags. The upper limit is more preferably 1000 (2000) μm.

  (6) When the soft packaging bag for viscous liquid is loaded into the squeezing device, the squeezing device is directed vertically, and the hole at the center or both ends of the soft wrapping bag is hooked on the hook provided in the squeezing device. A flexible packaging bag loading method, wherein the flexible packaging bag is mounted in parallel by being suspended in a tube and inserted in a leading end into a guide hole.

  According to the invention according to the present application, the flexible packaging bag can be more easily loaded into the ejection device by providing the ejection shaft on the ejection device. Moreover, according to this invention, it can be made to be the same process as a normal three-way seal bag.

FIG. 1 is a view showing a part of a flexible packaging bag and a holding tool. Example 1 FIG. 2 is a view showing a state where the squeezing device is loaded with a soft packaging bag. (Example 2) FIG. 3 is a side view of a squeezing device loaded with a flexible packaging bag.

  In this specification, “soft packaging bag” means a film flexible packaging bag such as a three-sided seal, pillow, gusset pouch, spout pouch, etc., optionally laminated with plastic film, metal foil, cellophane, and other base materials. General.

  In this specification, “caulking gun” means that a viscous liquid container is loaded into a discharge device called a handy gun for making it easier to use and handy at a construction site or factory. This is the caulking gun used.

  In this specification, the “squeezing device” is a kind of caulking gun, and a soft wrapping bag is attached, and the roller moves out from the bottom to the tip of the soft wrapping bag to squeeze out the contents. Refers to the device.

  In the present specification, the “viscous liquid” refers to a viscous liquid mainly for building materials, such as a caulking agent (sealing agent) and an adhesive.

There is one major difference between caulking guns for rigid containers (cartridges) and caulking guns for flexible packaging bags, and this difference comes from the difference in the characteristics of both.
In the former, when the container is set from the front end to the loading position, the rear end is naturally fitted and fixed.
In the latter case, the container grows as the contents decrease, so it is necessary to fix in the vertical and horizontal directions. However, if it is fixed in the longitudinal direction, the remaining of the solution becomes a problem due to wrinkles. , It must be set to the loading position from the rear end of the container.
For this reason, a protrusion shaft and a hook hole that can be set perpendicularly to the front body of the caulking gun are required.

  It was difficult to load the viscous liquid packaging bag into the squeezing device in parallel with the device. In order to eliminate this difficulty, for example, three hooks (projection shafts) may be provided in the holding tool (27) in FIG. Of these three, one at the center bends in an L-shape and is easily attached to the squeezing device (10) so that it does not come off easily by facing backward. In this case, the number of hooks is not limited to three, and the packaging bag may be attached in parallel to the apparatus. For example, the number may be one, five, or two, four or more, and it is preferable to install them symmetrically. Further, in addition to the L-shape, a round or triangular hook may be used.

  In the clamping device of Patent Document 1, the fastener (44) can be hooked outside the clamping device by the slide of the squeezing mechanism portion (12), and can be securely fixed. It was difficult. In the present invention, this point can be easily operated.

In the loading action to the caulking gun in Patent Document 2, the stored flexible packaging bag must be loaded while supporting the central portion of the central slide guide groove (16a).
Generally, since the operator does not take his hand off the caulking gun grip (17), the front side of the caulking gun is facing downward.
In such a state, it is difficult to load the stored flexible packaging bag into the caulking gun.

  Even if it is difficult to load, if the holding tool and the soft packaging bag are not perpendicular, the soft packaging bag will become wrinkled as the squeezing device slides, and the remaining capacity will deteriorate.

On the other hand, when the front side of the caulking gun is in the downward direction, the central protrusion shaft is upward, so that it is easy to be hooked in the central hook hole among the three holes at the rear end of the soft packaging bag.
Sequentially, it is also fitted into the two hooking holes on both sides, and at this point, the squeezing mechanism is perpendicular to the squeezing mechanism, so that the soft packaging bag does not wrinkle.

In order to overcome the difficulty in filling the latter in the soft packaging bag, as described in Patent Document 2 [, there is no progress in the soft packaging bag in the industrial field unless it is forward filling.
Therefore, the hook part (D) in the soft packaging bag bottom side short side bonding region (Ax2) is not necessary, and instead, on the further edge side of the bottom short side bonding region, the narrow bottom short side A bonding area is provided.

The caulking agent (sealing agent), which is a viscous liquid mainly used for building materials, is a vertical coating because of its character, so it belongs to a highly viscous range as a product.
Although it has a high viscosity, the product contains various components, and some of the fine particles are fine. Therefore, in the gap that exhibits the function of preventing these from leaking completely outside the bag (A), It tends to require filling time for the packaging bag.

In order to increase the filling speed, the width (W) of the exhaust port (E) is preferably 400 μm ≦ W ≦ 2000 μm, more preferably 400 μm ≦ W ≦ 1000 μm.
Even at this width, the thin heat-sealed part on the inner side of the rear end of the flexible packaging bag produces a garter effect, and a small amount of fine particles leaks and leaks in the middle. Since the air in the flexible packaging bag is removed before reaching the gap, the bottom short side non-bonding region (Az) after filling is ensured without being contaminated.
In addition, since the three protruding shafts are in the holding tool, the thick heat seal portion that hits the soft packaging bag bottom side short side bonding region is only the dead space in the holding device region, and is greatly reduced.

  As a packaging bag used for the squeezing device of the present invention, there is a through-hole that leads out the viscous liquid sealed inside the bag body that is formed by laminating a sheet material made of synthetic resin having gas barrier properties. It may be a viscous liquid packaging bag to be formed, and an existing pouch bag can be applied. As the simplest packaging bag, it is possible to use a bag body in which a stout or a plug is fused to the front end portion of a bag body formed by bonding a sheet material made of synthetic resin having gas barrier properties.

  When manufacturing a flexible packaging bag, a so-called “pouch” manufacturing technology for a flexible packaging bag can be used, so that it can be manufactured by an existing pouch manufacturing apparatus. In addition, when storing, it can withstand long-term storage before use by making it a flat packaging bag with high gas barrier properties, and by stacking, it can be stored in large numbers even in a small volume. . Since the whole is flat after use, there is an advantage that the volume of waste can be reduced.

  As the bag body of the present invention, any bag may be used as long as the periphery of a synthetic resin sheet material having gas barrier properties is bonded together. When forming a bag body by bonding, all or a part of the periphery of the sheet material can be bonded and sealed. For the bonding, a pouch bag manufacturing technique can be used.

  For example, as the material of the sheet material, a material having a barrier property against gas, for example, aluminum foil as a gas barrier layer, a stretched polyamide resin on one side and a heat-sealable low density polyethylene resin layer or an unsealed layer on the other side. A laminated film in which a stretched polypropylene resin layer or the like is laminated can be used. More specifically, since the film constituting the bag body only needs to heat-seal the inner surfaces around it, such a film is usually a laminated film mainly composed of plastic, and has one surface ( A film is preferably used in which the back surface or innermost layer is (2) a heat-sealing layer having heat-sealability, and the other surface (front surface or outermost layer) is (2) a layer having no heat-sealability.

  Therefore, as the simplest configuration, a film layer having a gas barrier function can be laminated as an intermediate layer between the base film layer and the heat seal layer. As the base film layer, in addition to a uniaxial or biaxially stretched film of polyethylene or polypropylene, a uniaxial or biaxially stretched polyamide film such as a uniaxial or biaxially stretched polyester film such as polyethylene terephthalate or polyethylene naphthalate is preferably used. it can. In particular, a uniaxially stretched film is preferable from the viewpoint of openability. These may be used singly or may be used by combining a plurality.

  When the intermediate layer is provided with a gas barrier property, a film of ethylene vinyl acetate copolymer saponified product, polyvinylidene chloride, polyacrylonitrile, or the like can be suitably used as the intermediate layer. The gas barrier property can be improved by providing an aluminum foil, a vapor deposition layer of silica, alumina, aluminum, or a coating layer of polyvinylidene chloride on these films. In this case, it may be formed by directly depositing or coating on the inner surface of the base film layer, or may be formed on another biaxially stretched nylon film, biaxially stretched polyethylene terephthalate film, biaxially stretched polypropylene film or the like. The film may be laminated on the intermediate layer. Among these, since the aluminum foil and the aluminum vapor deposition layer are opaque, they can also serve as a light shielding layer.

  In addition to the low-density polyethylene and linear low-density polyethylene, the innermost heat seal layer includes ethylene α-olefin copolymer, ethylene vinyl acetate copolymer, ethylene acrylic acid copolymer, and ethylene acrylic acid ester copolymer. A polymer, polypropylene, a copolymer thereof, or the like can be used. Sheet materials made of these laminated films are bonded together by heat sealing to produce a bag.

  In addition, as a method for mounting the distal end portion of the packaging bag of the present invention to the squeezing device, the front plate that rises upward from the distal end surface of the squeezing device includes a nozzle contact hole that contacts and supports the side wall of the nozzle, Place the tip of the bag with the nozzle inserted. Accordingly, the nozzle can freely move in the major axis direction of the nozzle, but is substantially fixed vertically and horizontally in the perpendicular direction. Further, as a preferable means for fixing the rear end portion, a hook is inserted into a hook hole in the rear portion of the bag support and is fixed by a holding tool. Accordingly, the rear end portion of the bag can be hooked by the hook (clamping tool) even when the squeezing mechanism portion slides toward the front end portion, and can be reliably fixed.

  A preferable packaging bag according to the present invention includes (1) a step of forming a rectangular and linear seal inside the rear end, and a synthetic resin (2) made of a synthetic resin having a gas barrier property, which is molded into a tubular shape. A step of forming the barrel, (3) a step of forming a tip of the bag by fusing a spout or a plug to the tip of the barrel molded into a cylindrical shape, and (4) a shape of the barrel. The film can be manufactured through a step of filling the viscous liquid from the spout or plug portion of the film and a step of (5) sealing the rear end portion. For the spout or spigot attached to the tip, an internal screw type is preferably used, but an external screw type spout or spigot can also be used. A nozzle suitable for the purpose of use is screwed into the screw provided at the tip.

  As a specific cap insertion piece, a material that is surely fused to the bonding edge of the sheet material is selected. For example, it is made of a polyethylene resin or a polypropylene resin that is easily fused to the polyethylene resin or polypropylene resin of the inner layer of the sheet material.

  The squeezing mechanism portion 12 of the squeezing device has two upper and lower rollers 21, and the soft wrapping bag is sandwiched between these rollers and moved in the distal direction, thereby pushing out the contents of the soft wrapping bag. Movement in the distal direction is made at a constant pitch by a pulling operation of the trigger. A ratchet feed mechanism, a feed claw mechanism, or the like is used as a mechanism that moves forward at a constant pitch in the distal direction.

  As a means for supporting the soft packaging bag of the squeezing device, it may be supported by a support bar as in Patent Document 1, but may be supported by a bottom plate as shown in FIG. In the case of the bottom plate, a space can be provided to such an extent that the strength is not impaired for the purpose of weight reduction or the like. Further, the bottom plate may be curved according to the curved surface of the bag.

  FIG. 1 shows the structure of the flexible packaging bag. Fig. 1a is a plan view of the flexible packaging bag, and Fig. 1b is a cross-sectional view (clamp) taken along the plane AA. An internal screw type cap 1 is installed on the top of the bag and fixed by heat sealing. The contents are filled from the plug 1. After the filling is completed, the cap 3 is attached. The left and right sides of the flexible packaging bag are heat sealed, and the inside of the bottom is also heat sealed in a rectangular shape. Further, a thin heat seal portion 4 is also provided at the lower portion of the rectangle. A hole 5 having a diameter of 3 mm to 9 mm is formed in the center and both sides of the rectangular heat seal portion. Exhaust holes are provided between both sides and the rectangle. The size of the exhaust hole is a size by which only the (fine-shaped) fine particles are discharged together with the air in consideration of the viscosity of the content and the size of the particle, and 400 μm ≦ W ≦ 2000 μm The range of is preferable. More preferably, it is in the range of 400 μm ≦ W ≦ 1000 μm. After filling and evacuating, the lower part of the rectangle is heat sealed. The clamping part 27 in Fig. 1a has a structure in which the flexible packaging bag is sandwiched from above and below. Fig. 1b shows the lower section of the clamp.

  With this structure, the liquid can be filled more quickly than the pouch-type viscous liquid container of Patent Document 2. Further, since the fastener is eliminated and the heat seal portion is not contaminated by the liquid, there is an effect that the heat seal after filling can be easily performed.

  2 and 3 show a method of loading a packaging bag into the squeezing device. The device clamp 27 is provided with three projections, and the central projection 8 is L-shaped. Thereby, it becomes possible to load with one hand, and the packaging bag can be securely fixed to the gun. Also, when loading, make the packaging bag installation surface of the gun vertical, insert the central protrusion 8 provided on the clamping tool into the central hole of the packaging bag, and then wrap the two or four protrusions on both sides in the same way Insert it into the bag hole. As a result, the gun installation surface and the bag are made parallel by gravity, so that they are fixed by the clamping device 27, pinched by the roller of the squeezing mechanism 12, and the trigger is pulled to move the roller in the tip direction. Can be squeezed out.

  At the end of squeezing, the remaining liquid remains in the nozzle and can be attached to the next packaging bag to reduce the loss. In particular, in the case of the internal screw system, since the liquid in the spout or plug portion remains in the nozzle, the loss can be further reduced.

  Because the flexible packaging bag is provided with a hook hole and hooked to the hook of the squeezing device, the soft wrapping bag can be installed in parallel with the squeezing device, and the contents can be squeezed reliably, so it can be used at construction sites, etc. it can.

DESCRIPTION OF SYMBOLS 1 Soft packaging bag 2 Port stopper 3 Cap 4 Heat seal part 5 Hook hole 6 Exhaust port 7 Sealing part after filling 8 Hook (center)
DESCRIPTION OF SYMBOLS 9 Hook 10 Squeezing device 12 Squeezing mechanism part 13 Drive mechanism part 14 Front surface plate 15 Rear surface plate 17 Grip 18 Trigger 19 Slide bar 21 Up-and-down roller 22 Roller support body 27 Holding tool (gripping tool)
29 Fastener 40 Bottom plate 50 Guide hole 60 Nozzle

Claims (1)

A caulking gun that squeezes viscous liquid from a pouch-type viscous liquid bag containing viscous liquid by a roller-type squeezing mechanism, and has an L-shaped hook at the center of the holding part of the caulking gun. A plurality of hooks are arranged in the horizontal direction on the left and right, and a pouch-type viscous liquid bag is set on the hooks. The injection part of the pouch-type viscous liquid bag is placed in the longitudinal direction on the front plate of the caulking gun. A caulking gun having a movable nozzle abutting hole, capable of loading a pouch-type viscous liquid bag with one hand and reliably squeezing the viscous liquid .