Paper container with discharge pump

Abstract

To create a discharge pump capable of suppressing falling-down of the discharge pump itself while preventing a paper container from being deformed during a discharging operation, and to create the paper container provided with the discharge pump.SOLUTION: A paper container provided with a discharge pump comprises a paper container 1 in which a content fluid is stored, and a discharge pump 10 attached to a top wall part 4 of the paper container 1. The discharge pump 10 comprises an operation member B for performing a discharging operation, and a fixed suction part A including a pipe 26 for sucking up the content fluid in response to the charging operation. A pipe lower end 26B of the pipe 26 is adjacent to or arranged in contact with a bottom wall part 2 of the paper container 1, and a deformation-suppressing part α is provided between the pipe lower end 26B and the bottom wall part 2.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a paper container with a discharge pump. [Background technology]

[0002] Conventionally, various containers made of paper or resin have been used to store and distribute liquid contents such as detergents. In particular, paper containers that are easy to recycle are widely used from the viewpoints of economy and environmental consideration, and paper containers with discharge pumps that are equipped with pump-type dispensing devices (dispensers) that make it easy to discharge the liquid contents are known (see, for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 10-147335 [Patent Document 2] Patent Publication No. 2018-135102 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned conventional paper containers with discharge pumps, the discharge operation requires moving the head part (operating member) up and down to drive the discharge pump, but this causes the paper container to easily deform, and in particular the top wall part is easily crushed and deformed, or the discharge pump itself is easily toppled over, resulting in the problem that the discharge operation becomes difficult.

[0005] The present invention aims to solve the problems of the conventional technology described above by creating a discharge pump and a paper container with a discharge pump that can prevent deformation of the paper container during the discharge operation and suppress the collapse of the discharge pump itself. [Means for solving the problem]

[0006] Among the means for solving the above problems, the main means of the present invention is: A paper container containing a liquid content and a seal attached to the top wall of the paper container. At the same time, the liquid content is sucked up. A paper container with a discharge pump, which is provided with a discharge pump having a pipe. 、 before Pipe is a straight pipe Pipe bottom The above Arranged close to or in contact with the bottom wall of the paper container will be At the same time, the lower end of the pipe and The aforementioned A deformation suppression portion is provided between the bottom wall portion and the And, The deformation suppression portion is configured to include a pair of inverted V-shaped notches formed axially symmetrically at the lower end of the pipe, and a folded portion formed in the bottom wall portion so as to have a convex cross section and be able to fit into the pair of notches. It is said that the feature of this method is that it is The main feature of the present invention is that it is possible to prevent the top wall from being crushed and deformed, and to suppress the discharge pump from falling over.

[0009] Another aspect of the present invention is The above means In addition, the paper container has a top wall and a bottom wall that are horizontally disposed, and is formed in the shape of a rectangular parallelepiped, a cylinder, or a polygonal tube. The above-mentioned means can prevent the top wall from being crushed and deformed and suppress the discharge pump from tipping over during operation, regardless of the shape of the paper container. [Effects of the Invention]

[0010] The paper container with a discharge pump of the present invention can prevent deformation of the paper container during the discharge operation and suppress the discharge pump itself from falling over. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a partial cross-sectional view showing a paper container with a discharge pump according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a partially enlarged view of FIG. [Figure 3] FIG. 4 is a partial cross-sectional view showing a paper container with a discharge pump according to a second embodiment of the present invention. [Figure 4] 4 is a plan view taken along line IV-IV in FIG. 3. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, a first embodiment of the paper container with a discharge pump will be described. FIG. 1 is a partial cross-sectional view showing a paper container with a discharge pump according to a first embodiment of the present invention, and FIG. 2 is a partially enlarged view of FIG. The paper container with a discharge pump is configured to include a paper container 1 that contains a liquid content such as a detergent, and a discharge pump 10 that discharges the liquid content from the paper container 1.

[0013] The paper container 1 is made of paper material 1A, which is made by laminating thin waterproof resin sheets on both the front and back sides. The paper container 1 is a pack container formed by folding paper material 1A cut to a predetermined shape into a rectangular parallelepiped, and is configured, for example, by having side walls 3 that form the four sides of a bottom wall 2 that is square in plan view and are erected on the four sides, and a top wall 4 that is also square in plan view and is integrally connected to the upper end of each side wall 3. In this embodiment, an opening 5 is formed in the center of the top wall 4, and a spout 7 is attached to this opening 5.

[0014] The dispensing member 7 is a synthetic resin member having a cylindrical dispensing tube 7A and an outer flange 7B connected to the bottom end thereof, and a thread is formed on the outer peripheral surface of the dispensing tube 7A. Then, with only the dispensing tube 7A protruding from the mouth 5 to the outside of the paper container 1, the resin sheet material on the underside of the top wall 4 around the mouth 5 and the upper surface of the outer flange 7B are fixed by means of heat welding or the like.

[0015] In this embodiment, the paper container 1 is formed three-dimensionally by first attaching a spout 7 to a predetermined position (the position that will become the center of the top wall 4 after folding) of paper material 1A that has been cut to a predetermined shape, then folding it into a rectangular parallelepiped shape, and heat-welding each of the hem portions 6 (see Figure 4) together as needed. As shown enlarged in Figure 1, at the center of the inner surface of the bottom wall 2 of the rectangular parallelepiped-shaped paper container 1, a part of the paper material 1A is folded inward in a mountain fold to form a convex cross section (also called an inverted U-shape), and a fold-in portion 1a is formed that extends linearly in one direction perpendicular to the container axis O (the direction perpendicular to the paper surface in Figure 1).

[0016] The discharge pump 10 comprises a fixed suction part A comprising a cylinder 11, a ring cap 12 and an attachment member 13, and an operating member B comprising a piston guide 21, a stem 22, an annular piston 23, a discharge head 24, a blocking cylindrical member 25 and a pipe 26. Each of these components is made primarily of synthetic resin, and may also be made of metal or flexible elastomer, etc., as needed.

[0017] The fixed suction part A will be described. The cylinder 11 is a cylindrical member whose diameter tapers from the top to the bottom, with a first peripheral wall portion 11a, a second peripheral wall portion 11b, and a third peripheral wall portion 11c. A first check valve V1 is provided inside the third peripheral wall portion 11c. The structure of the first check valve V1 is omitted here; however, when the actuating member B is pressed, the first check valve V1 closes, allowing the liquid content in the cylinder 11 to be discharged through the discharge head 24. When the actuating member B is released from the pressure, the first check valve V1 opens, allowing the liquid content in the paper container 1 to be sucked up into the cylinder 11. A pipe fitting cylindrical portion 11d hangs down from the bottom end of the third peripheral wall portion 11c. An outside air introduction hole 11e is drilled radially through the top of the second peripheral wall portion 11b (see Figure 2).

[0018] The cylinder 11 has an outward flange 11A protruding from the upper end of the first peripheral wall portion 11a, and a cylindrical extension wall portion 11B standing upright through the inner peripheral portion of this outward flange 11A. A packing 15 is provided between the lower surface of the outward flange 11A and the upper end of the pouring tube 7A of the pouring member 7.

[0019] An upper end 26A of a pipe 26 is fitted into the pipe fitting cylindrical portion 11d. The pipe 26 has an elongated cylindrical shape and is made of a relatively hard synthetic resin that does not easily deform. The pipe lower end 26B hangs downward in the figure and is disposed close to or abutting the bottom wall 2 of the paper container 1. As shown in the enlarged view of Figure 1, a pair of inverted V-shaped notches 26a are formed in positions symmetrical to the axis of the pipe lower end 26B of the pipe 26, and the folded-in portion 1a formed on the bottom wall 2 of the paper container 1 is disposed so as to be able to fit into the pair of notches 26a.

[0020] The ring cap 12 has an outer cylinder 12c, a middle cylinder 12d, and an inner cylinder 12e formed on the underside of the top plate 12a, and the extension wall 11B is non-rotatably fitted between the inner surface of the middle cylinder 12d and the outer surface of the inner cylinder 12e. It also has an extension 12b that protrudes above the inner cylinder 12e, and a thread is provided on the outer surface of this extension 12b, forming a fixing part L to which the discharge head 24 described later can be fixed by screwing.

[0021] The mounting member 13 has a mounting tube portion 13A that can be threaded onto a thread formed on the pouring tube 7A of the pouring member 7 on the paper container 1 side, and an inward flange-shaped top wall portion 13B protrudes from the upper part of this mounting tube portion 13A. The inward flange-shaped top wall portion 13B is mounted by being loosely fitted between the ring cap 12 and the outward flange 11A so as to be rotatable.

[0022] Next, the operating member B will be described. The piston guide 21 includes a guide tube 21a that is movable up and down along the container axis O within the cylinder 11. An outward flange-shaped wall portion 21b protrudes from the lower end of the guide tube 21a, and a seal tube portion 21c hangs down from the outer periphery of the outward flange-shaped wall portion 21b. A coil spring S is disposed on the underside of the outward flange-shaped wall portion 21b.

[0023] When the operating member B is at its lowest position and the discharge head 24 is screwed to the fixed portion L (unused state), the cylindrical seal portion 21c fits tightly into the upper end of the inner periphery of the third circumferential wall portion 11c of the cylinder 11, isolating the upper and lower parts of the cylinder 11. When the operating member B is raised and disengaged upward from the third circumferential wall portion 11c, the cylindrical seal portion 21c is configured to allow communication between the upper and lower parts of the cylinder 11 as shown in FIG.

[0024] The stem 22 is fitted to the outer surface of the upper part of the guide tube 21a and has a stem tube 22a that stands up from the fitted part. The discharge head 24 is connected to the upper end of the stem tube 22a, and a large diameter tube portion 22b is formed at the lower end.

[0025] The annular piston 23 is an annular member having an H-shaped cross section, with an outer cylindrical portion 23a and an inner cylindrical portion 23b connected at their vertically intermediate portions. The outer cylindrical portion 23a is fitted liquid-tightly and vertically relative to the inner surface of the second circumferential wall portion 11b of the cylinder 11. The upper portion of the inner cylindrical portion 23b is fitted liquid-tightly and vertically relative to the inner surface of the large-diameter cylindrical portion 22b at the lower end of the stem 22, and the lower end forms a second check valve V2 with the upper surface of the outward flange-shaped wall portion 21b. That is, when the annular piston 23 descends relative to the piston guide 21 and the stem 22, the second check valve V2 closes, and when the annular piston 23 ascends relative to the piston guide 21 and the stem 22 from that state, the second check valve V2 opens.

[0026] The discharge head 24 has a first small-diameter connecting cylindrical portion 24a and a second large-diameter connecting cylindrical portion 24b that hang down from the center of the back surface of the top wall 24A, and a head peripheral wall 24B that hangs down from the outer periphery of the top wall 24A. A nozzle 24C is formed at the upper end of the first connecting cylindrical portion 24a, opening at its base end and penetrating the second connecting cylindrical portion 24b and the head peripheral wall 24B to protrude outward. A thread is formed on the inner surface of the second connecting cylindrical portion 24b, and is configured to screw into a fixing portion L on the ring cap 12 when the discharge head 24 is in the lowest position, thereby maintaining the lowered position.

[0027] The operating member B is constantly biased upward by a coil spring S interposed between the lower surface of the outward flange-shaped wall portion 21b of the piston guide 21 and the lower end of the third circumferential wall portion 11c (the upper end of the pipe fitting cylindrical portion 11d). When assembling the operating member B to the fixed suction portion A, the operating member B is inserted into the cylinder 11 from above and screwed onto the mounting member 13.

[0028] As shown in Figure 2, the blocking tube member 25 is composed of a base tube portion 25A whose upper end protrudes from the upper end opening of the fixed suction portion A and has a gap inside for introducing outside air, and which is fitted to the lower outer periphery of the stem 22 so as to be movable up and down, and an annular sliding blocking portion 25B which protrudes from the lower outer periphery of the base tube portion 25A and is fitted to the upper inner periphery of the cylinder 11 so as to be movable up and down.

[0029] This blocking tube member 25 is configured to transition the outside air introduction hole 11e to a blocked state when the operating member B moves to its lowest position, transition the outside air introduction hole 11e to an open state when the operating member B moves to the upper limit position of the stroke, and maintain the open state of the outside air introduction hole 11e when the operating member B moves up and down to discharge the content liquid.

[0030] Next, the operation and effect of the paper container with a discharge pump having the above-mentioned configuration will be described. First, the screw connection between the discharge head 24 and the fixing portion L on the ring cap 12 side is released, and the operating member B is raised. Next, the discharge operation is performed by moving the operating member B up and down to drive the discharge pump 10. Then, the liquid content in the paper container 1 is sucked up into the cylinder 11 via the first check valve V1, and the liquid content in the cylinder 11 is further sucked up via the second check valve V2, allowing the liquid content to be discharged from the nozzle 24C of the discharge head 24.

[0031] As described above, the pipe 26 is positioned close to or in contact with the bottom wall 2 of the paper container 1, and when the dispensing operation is performed, the lower end 26B of the pipe abuts against the bottom wall 2, allowing the pipe 26 to support the vertical load (pressing force) applied to the top wall 4, thereby preventing the top wall 4 from being crushed or deformed.

[0032] Furthermore, a pair of slits 26a formed in the lower end 26B of the pipe can fit into the folded-in portion 1a formed in the bottom wall portion 2 of the paper container 1, and the pair of slits 26a are in a state where they are difficult to come off the folded-in portion 1a. Therefore, even when a discharge operation is performed, movement in at least the other direction (left and right direction in FIG. 1) perpendicular to the one direction in which the folded-in portion 1a extends can be prevented, and the discharge pump 10 can be prevented from tipping over. This improves the operability of the paper container with a discharge pump during the discharge operation. That is, the pair of cut portions 26a and the folded portion 1a constitute a deformation suppressing portion α that suppresses crushing deformation of the paper container 1.

[0033] Next, a second embodiment of the present invention will be described. FIG. 3 is a partial cross-sectional view showing a paper container with a discharge pump according to a second embodiment of the present invention, and FIG. 4 is a plan view taken along line IV-IV in FIG. The paper container with a discharge pump shown in the second embodiment differs from the first embodiment in the configuration of the deformation suppression part α, but the other configurations and effects are the same as those of the first embodiment. Therefore, the following description will focus on the parts that are different from the first embodiment, and the same members will be given the same reference numerals.

[0034] 3 and 4, in the paper container with a discharge pump in the second embodiment, the deformation suppression section α is configured so that a recess 2A having a square shape in a plan view is recessed in the center of the bottom wall 2 of the paper container 1, and the pipe lower end 26B is accommodated in this recess 2A. The length and width of the recess 2A are formed to be slightly larger than the outer diameter of the pipe lower end 26B.

[0035] In the second embodiment, the deformation suppression portion α makes it difficult for the pipe lower end 26B to come out of the recess 2A during the discharge operation, and it is possible to suppress the discharge pump 10 from falling in all directions relative to the container axis O, thereby further improving operability during the discharge operation of moving the actuating member B up and down. Also, the pipe lower end 26B may be provided with a notch 26a similar to that in the first embodiment, or the end of the pipe lower end 26B may be cut. This can improve the suction of the content liquid.

[0036] The configuration and effects of the present invention have been described above in accordance with the examples, but the present invention is not limited to the above examples. For example, in the above embodiment, the discharge pump 10 is provided at the center of the top wall 4 as a preferred embodiment, but it does not necessarily have to be at the center.

[0037] Furthermore, the discharge pump 10 may be a pump capable of discharging mist or foam, and is not limited to the embodiment.

[0038] In the above embodiment, the shape of the paper container 1 is described as being rectangular, but the shape of the paper container 1 is not limited to that of the above embodiment, and the side wall portion 3 may be any shape as long as it has a top wall portion 4 and a bottom wall portion 2 that are arranged horizontally to each other.For example, it may be cylindrical, or may be any other polygonal cylindrical shape such as a pentagonal cylindrical shape or a hexagonal cylindrical shape.

[0039] In the second embodiment, the planar shape of the recess 2A is described as a square, but any shape that can accommodate the pipe lower end 26B and restrict horizontal movement may be used, for example, a circle, a triangle, or other shape. [Industrial Applicability]

[0040] The present invention can expand the applications of discharge pumps and paper containers with discharge pumps to a wider range of areas. [Explanation of symbols]

[0041] 1: Paper container 1A:Paper material 1a: Fold-in section 2: Bottom wall 2A: Recess 3: Side wall 4:Top wall part 5: Mouth 6: Daibe 7: Dispensing member 7A: Pour tube 7B: Outer flange 10: Discharge pump 11: Cylinder 11A: Outward flange 11B: Extension wall 11a: First peripheral wall part 11b: Second peripheral wall part 11c: Third peripheral wall part 11d: Pipe fitting cylinder 11e: Outside air intake 12: Ring cap 12a:Top plate 12b: Extension part 12c: Outer cylinder 12d: Middle cylinder part 12e: Inner cylinder part 13: Mounting material 13A: Mounting tube 13B: Inward flange-shaped top wall portion 15: Packing 21: Piston guide 21a: Guide tube 21b: Outward flange-shaped wall 21c: Seal cylinder 22: Stem 22a: Stem tube 22b: Large diameter cylindrical section 23: Annular piston 23a: Outer cylinder 23b: Inner cylinder part 24: Discharge head 24A:Top wall 24B: Head wall 24C: Nozzle 24a: First connecting cylinder part 24b: Second connecting cylinder part 25: Closure tube member 25A: Base tube part 25B: Sliding blocking part 26: Pipe 26A: Upper end of pipe 26B: Pipe bottom 26a: Notch A: Fixed suction part A11: Cylinder B: Operating member H: Cross section L:Fixed part O: Container axis S: Coil spring V1: First check valve V2: Second check valve α: Deformation suppression part

Claims

1. A paper container with a discharge pump, comprising: a paper container (1) containing a liquid content; and a discharge pump (10) attached to a top wall portion (4) of the paper container (1) and having a pipe (26) for sucking up the liquid content, The pipe (26) has a straight pipe lower end (26B) disposed adjacent to or in contact with the bottom wall portion (2) of the paper container (1), and a deformation suppression portion (α) is provided between the pipe lower end (26B) and the bottom wall portion (2), The paper container with a discharge pump is characterized in that the deformation suppression portion (α) is configured to have a pair of inverted V-shaped notches (26a) formed axially symmetrically at the lower end (26B) of the pipe, and a folded-in portion (1a) formed in the bottom wall portion (2) with a convex cross section and arranged so as to be able to fit within the pair of notches (26a).

2. 2. The paper container with a discharge pump according to claim 1, wherein the paper container (1) has a top wall portion (4) and a bottom wall portion (2) that are arranged horizontally to each other and is formed in the shape of a rectangular parallelepiped, a cylinder, or a polygonal tube.

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