JP2017088199A - Injection port member and storage bag having this injection port member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an injection port member and a liquid storage bag having this injection port member, capable of reducing the number of part items, a manufacturing process and manufacturing cost.SOLUTION: An injection port member 3 is provided by joining to a storage bag body 2 for storing the content. The injection port member 3 is integrally molded with a cylindrical body 31 having a circulation passage 32 for circulating the content, a joining part 40 constituted so as to be joinable with the storage bag body 2 and a check valve for allowing injection of the content. The check valve comprises a valve seat part 50 rotatably provided in the direction for blocking up a base end side opening 33 of the cylindrical body 51 via a hinge part 51 in a cylindrical body 31 and a valve element 60 provided on the downstream side in the injection direction in the circulation passage 32 and opening-closing the circulation passage 32 by being energized in the direction for seating on the valve seat part 50, and comprises locking parts 41, 41a, 54 and 54a for maintaining blocking-up of the base end side opening 33 of the cylindrical body 31 by mutually locking the valve seat part 50 and the joining part 40.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a spout member for pouring the contents stored in a storage bag and a storage bag provided with the spout member.

  As a storage bag of this type, a plurality of resin film-like members are stacked, and the corresponding peripheral edges of these film-like members are thermally welded to form a storage bag body, and the contents stored in the storage bag body What provided the spout member which pours out is known. Among these, when the contents to be filled are, for example, soy sauce, edible oil, alcoholic beverages, etc., it is preferable not to touch oxygen in the air as much as possible in order to prevent deterioration due to oxidation.

  For this reason, there is a need for a storage bag with a check valve in which a check valve is incorporated in the spout member so as not to suck outside air immediately after the contents are poured out. As a spout member of this type of storage bag with a check valve, a cylindrical body having a valve seat portion on the inner peripheral surface on the proximal end side, a valve body seated on the valve seat inside the cylindrical body, A coil spring that urges the valve body from the distal direction toward the proximal direction inside the cylindrical main body, and the inner end of the distal end opening of the cylindrical main body is fitted while pushing the distal end of the coil spring toward the proximal direction. What consists of four parts with a cylindrical member is known. (For example, refer to Patent Document 1).

Japanese Patent Laying-Open No. 2015-48143

  However, this checkout valve-equipped dispensing member requires not only a plurality of members, but when assembling this, the valve body and the coil spring are inserted into the cylindrical body, and the valve body and the valve seat It is necessary to fit the cylindrical member to the tip opening of the cylindrical body while aligning and resisting the biasing force of the coil spring. For this reason, there is a disadvantage that the cost increases with an increase in the number of parts and an increase in the number of assembly steps.

  In view of the above points, an object of the present invention is to provide a spout member that can reduce the number of parts, the manufacturing process, and the manufacturing cost, and a liquid storage bag including the spout member.

  In order to achieve such an object, the spout member of the present invention is a spout member provided by being joined to the main body of the containing bag for storing the contents, and the spout member is a flow through which the contents circulate. A cylindrical main body having a path; a joint provided at a base end portion of the cylindrical main body and configured to be connectable to the containing bag main body; and disposed on the flow path, allowing the contents to be poured out. The check valve is formed integrally with the check valve, and the check valve is provided in the cylindrical main body via a hinge portion so as to be rotatable in a direction to close the proximal end side opening of the cylindrical main body. And a valve body that is provided on the downstream side in the dispensing direction in the flow passage and is biased in a direction to be seated on the valve seat portion to open and close the flow passage, and the valve seat portion and the joint portion And a locking portion for maintaining the closure of the proximal end side opening of the cylindrical main body by locking each other. To.

  As for the spout member of this invention, the cylindrical main body provided with a junction part and a valve body, and the valve seat part are connected by the hinge part. As a result, all the parts can be integrally formed, so that the number of parts can be reduced.

  And the spout member of this invention can be locked in the state which rotated the said valve seat part by making the said hinge part into a fulcrum by the latching | locking part, and obstruct | occluded the base end side opening of the said cylindrical main body. For this reason, an assembly is also easy and a manufacturing process and manufacturing cost can be reduced.

  Further, in the spout member of the present invention, the locking portion is provided at a position where it can be joined to the containing bag body when the valve seat portion and the locking portion are locked to each other. Is preferred.

  According to this, the said latching | locking part is joined to the said storage bag with this junction part in the state which latched the said valve seat part and the said junction part. Therefore, without adding a manufacturing process, the valve seat part which closed the base end side opening of the said cylindrical main body can be firmly latched by the manufacturing process of the usual storage bag, and the valve seat can be locked from the base end side opening. It can prevent that a part remove | deviates and the sealing performance of a container falls.

  Moreover, the spout member of this invention WHEREIN: It is preferable that the said hinge part is connected with the junction part of the said cylindrical main body in the position which can be joined with the said storage bag main body.

  According to this, the said hinge part is connected with the said junction part, and is joined with the said storage bag main body with this junction part. Therefore, without adding a manufacturing process, the valve seat part which closed the base end side opening of the said cylindrical main body can be firmly latched by the manufacturing process of the usual storage bag, and the valve seat can be locked from the base end side opening. It can prevent that a part remove | deviates and the sealing performance of a container falls.

  In order to achieve the object, the storage bag of the present invention is characterized in that the spout member is joined to a storage bag body made of a film-like member.

  According to the storage bag of the present invention, as described above, the number of parts, the manufacturing process, and the manufacturing cost can be reduced.

The perspective view which shows one Embodiment of the spout member and accommodation bag of this invention. The bottom side perspective view of the valve seat open state of the spout member of FIG. The bottom view of the valve seat open state of the spout member of FIG. FIG. 1 is a bottom perspective view of the spout member of FIG. 1 with the valve seat closed. The bottom view which shows the other example of the spout member of this invention.

  An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the storage bag 1 of this embodiment includes a bag body 2 and a spout member 3. For example, liquids such as liquid detergents, seasonings, drinking water and chemicals, and solvents such as inks. Can be accommodated.

  The bag body 2 is, for example, a self-standing type standing pouch (bottom gusset bag) as shown in FIG.

  However, the bag body 2 is not limited to the bottom gusset bag, but may be a palm bag (pillow bag), a three-side bag, a four-side bag (flat pouch), a side gusset bag, or the like. More generally speaking, the bag body 2 may be a bag body or the like as long as the internal pressure in the container is increased by pushing the body by hand.

  The bag body 2 includes a pair of opposing side wall portions 21 and a bottom wall portion 22 that is bonded to the side wall portion 21 at the bottom of the side wall portions 21.

  Each side wall portion 21 is formed in a rectangular shape, and both side edges are bonded to each other by heat welding. The bottom wall portion 22 has a peripheral edge bonded to the inner surface of each side wall portion 21 by thermal welding, and closes the bottom portion of the bag body 2.

  In the present embodiment, the bag body 2 is formed by heat welding, but the present invention is bonded using other known bonding methods (adhesive, ultrasonic seal, high frequency seal, impulse seal, etc.). May be.

  As the film-like member constituting the side wall portion 21 and the bottom wall portion 22, a film having at least an innermost layer having heat welding properties is used. Specifically, a two-layer structure in which a sealant layer having heat-weldability such as polyethylene or polypropylene and an outer layer made of a stretched film such as a biaxially stretched nylon film or a biaxially stretched polyethylene terephthalate film are laminated. It is possible to use three or more layers in which a metal foil, paper, an inorganic vapor deposition layer, an ethylene-vinyl alcohol copolymer layer or the like is sandwiched between them. A plurality of these layers may be used.

  As shown in FIG. 1, the spout member 3 includes a cylindrical main body 31 formed in a cylindrical shape having both ends opened. The opening located at the lower end of the cylindrical main body 31 communicates with the inside of the bag main body 2 and serves as an inlet 33 for introducing the contents into the flow passage 32 inside the spout member 3, while the spout member The opening located at the upper end of 3 is a spout 34 for pouring out the contents introduced into the flow passage 32 to the outside.

  A joint portion 40 extending in the radial direction is integrally formed on the outer peripheral surface of the base end portion of the cylindrical main body 31. The joint portion 40 has a hexagonal shape in plan view and extends substantially in a boat shape.

  In addition, the cylindrical main body 31 is formed with a flange portion 35 that projects outwardly above the joint portion 40. Further, a male thread portion 36 that is screwed into the cap C is formed on the upper outer peripheral surface of the cylindrical main body 31.

  The resin constituting the spout member 3 needs to be able to be thermally welded to the bag body 2. Therefore, it is preferable that at least a part is made of a resin material such as polyethylene or polypropylene, and is a resin common to the sealant layer of the bag body 2.

  And the junction part 40 among the spout members 3 is inserted | pinched by the upper end part 21a of the both-sides wall part 21, and it heat-welds reliably, and the leakage of the liquid from between the spout member 3 and the bag main body 2 is prevented reliably. can do. In addition, it is preferable to form a groove | channel and a protruding item | line in the side surface of the junction part 40 in order to make heat welding more reliable.

  FIG. 2 is a perspective view of the spout member 3 as viewed from the bottom, and is a reference diagram for explaining a state in which a valve seat portion described later is opened. Hereinafter, the check valve mechanism included in the spout member 3 of the present embodiment will be described with reference to FIG.

  As shown in FIG. 2, the spout member 3 has a check valve mechanism on the upstream side of the flow passage 32. The check valve mechanism includes a substantially ring-shaped valve seat portion 50 and a valve body 60. The valve body 60 is urged toward the valve seat portion 50 by an urging means described later, and is seated on the valve seat portion 50 so as to be sealed.

  The valve seat part 50 and the joint part 40 are rotatably connected by a hinge part 51 formed into a thin wall. Thereby, the spout member 3 can integrally mold all the constituent parts with the resin. The hinge portion 51 is disposed at the outer edge of the lower end of the joint portion 40 and in a range where it is thermally welded to the bag body 2. Thereby, the hinge part 51 is welded to the bag main body 2 simultaneously when the bag main body 2 and the joint part 40 are heat-welded.

  A circular opening 52 is formed in the center of the valve seat 50. In the opening 52, a part of the tip of the valve body 60 is formed to have an inner diameter that can be fitted or hermetically contacted, thereby ensuring the sealing performance.

  On the inner side surface of the valve seat portion 50 (the surface facing the flow passage 32), a convex plug portion 53 is formed in an annular shape centering on the opening 52. The outer diameter of the plug portion 53 is slightly larger than the inner diameter of the introduction port 33 and is fitted to the introduction port 33 so that the introduction port 33 is hermetically closed by the valve seat portion 50.

  Further, the valve seat portion 50 is provided with a tongue piece 54 that protrudes toward the joint portion 40 at an edge portion on the opposite side of the hinge portion 51. The tongue piece 54 has a substantially rectangular plate shape, and a substantially rectangular locking hole 54a is formed in the center along the longitudinal direction.

  The joint portion 40 is formed with a recess 41 at the opposite edge of the hinge portion 51 so that the tongue piece 54 fits when the valve seat portion 50 is closed. In addition, a protrusion 41 a that fits into the locking hole 54 a is formed at a position corresponding to the locking hole 54 a of the tongue piece 54. As a result, when the valve seat portion 50 is closed, the tongue piece 54 is fitted into the concave portion 41, and the protrusion 41a of the concave portion 41 is fitted into the locking hole 54a of the tongue piece 54. It is securely locked in the closed state.

  The tongue piece 54 and the recess 41, the locking hole 54a and the protrusion 41a correspond to the locking portion of the present invention. Note that both the tongue piece 54 and the recessed portion 41 and the locking hole 54a and the protruding portion 41a may be provided as in this embodiment, or only one set may be provided.

  Further, the engaging portions (the tongue piece 54 and the recessed portion 41 and the engaging hole 54a and the projecting portion 41a) are disposed at the outer edge of the lower end of the joining portion 40 and in the range where the bag main body 2 is thermally welded. Thereby, the latching | locking part is welded to the bag main body 2 simultaneously when the bag main body 2 and the junction part 40 are heat-welded.

  As shown in FIGS. 2 and 3, a valve body 60 is disposed in the flow passage 32, and the valve body 60 is elastically deformed radially extending toward the center so as to form a gap from the inner wall surface of the flow passage 32. It comprises a plurality of possible elastic pieces 61 and a substantially bowl-shaped valve portion 62 provided integrally at the tip of each elastic piece 61.

  The elastic piece 61 includes a lateral elastic portion 61 a extending radially from the inner wall surface of the flow passage 32 away from the introduction port 33 in the direction of the spout 34 by a predetermined length toward the center of the flow passage 32. It is formed in a substantially L shape in a side view including a longitudinal elastic portion 61b that is bent and extends upstream from the tip of the elastic portion 61a in a substantially vertical direction with respect to the lateral elastic portion 61a and connected to the valve portion 62. . Thereby, the elastic piece 61 can be easily elastically deformed along the flow path 32.

  In the present embodiment, three elastic pieces 61 are formed at equal intervals in the circumferential direction. Thereby, since it is well-balanced and is not easily decentered, the accuracy of the valve closing state can be increased.

  The tip of the longitudinal elastic part 61b of each elastic piece 61 is connected to the downstream peripheral edge of the outer periphery of the substantially bowl-shaped valve part 62 from the downstream direction. The outer shape of the valve portion 62 is formed to be substantially the same as or larger than the inner diameter of the opening portion 52, and the valve portion 62 is urged upstream by the elastic piece 61 and is seated on the opening portion 52. The part 52 is opened and closed.

  Next, assembly and manufacture of the spout member 3 and the accommodation bag 1 of this embodiment are demonstrated.

  As mentioned above, since the valve seat part 50 is connected with the junction part 40 of the cylindrical main body 31 by the hinge part 51, the spout member 3 can be integrally molded with the said resin. Thereby, since it can manufacture with one set of metal mold | die, a number of parts and manufacturing cost can be reduced.

  Next, as shown in FIG. 4, the valve seat portion 50 of the integrally formed spout member 3 is rotated toward the joint portion 40 around the hinge portion 51, and the introduction port 33 is moved by the valve seat portion 50. Occlude. As a result, the valve portion 62 is seated on the opening 52 while being urged upstream by the elastic piece 61, so that a check valve mechanism is configured.

  Further, at the time of the closing, the tongue piece 54 of the valve seat portion 50 is fitted into the concave portion 41 of the joint portion 40, and the protruding portion 41 a of the concave portion 41 is fitted into the locking hole 54 a of the tongue piece 54. . Thereby, the valve seat part 50 is reliably latched in the state which obstruct | occluded the inlet 33. FIG.

  Next, as shown in FIG. 1, the bag body 2 is formed by thermally welding the side wall portion 21 and the bottom wall portion 22. At the same time, the side surface of the joint portion 40 of the spout member 3 is sandwiched by the upper end portions 21a of the side wall portions 21 and thermally welded. By the thermal welding, the hinge portion 51 and the locking portion (the tongue piece 54 and the concave portion 41 and the locking hole 54a and the protruding portion 41a) are simultaneously welded to the bag body 2 and the joint portion 40 at the same time. It is welded to the main body 2. Thereby, since the valve seat part 50 is welded with the joint part 40 and the side wall part 21 in the state which closed the inlet 33, the valve seat part 50 remove | deviates from the joint part 40, and the sealing property of the accommodation bag 1 is sufficient. It can prevent reliably that it falls.

  Moreover, since it is not necessary to add a new process to the conventional manufacturing process, the above manufacturing process can reduce a manufacturing process and manufacturing cost.

  The check valve mechanism is not limited to the shape of the present embodiment. For example, as shown in FIG. 5, a substantially cylindrical valve integrally provided at the distal end of each elastic piece 71 and each elastic piece 71. It can also be configured like a valve body 70 having a portion 72.

  The elastic piece 71 includes a first lateral elastic portion 71c extending radially from the inner wall surface of the flow passage 32 away from the introduction port 33 in the direction of the spout 34 by a predetermined length toward the center of the flow passage 32. A curved elastic portion 71d extending from the tip of the first lateral elastic portion 71c along the circumferential direction of the flow passage 32; and a valve portion 72 extending from the tip of the curved elastic portion 71d toward the center of the flow passage 32. It is formed in a substantially crank shape including a second lateral elastic portion 71e connected to the side wall. Four elastic pieces 71 are provided at equal intervals in the circumferential direction, and the four elastic pieces 71 are arranged in a substantially bowl shape as a whole.

  Since the elastic piece 71 has a curved elastic portion 71d extending along the circumferential direction, the elastic piece 71 extends linearly from the inner wall surface of the flow passage 32 toward the center of the flow passage 32 and is connected to the valve portion 72. The elastic piece 71 can be formed long. Thereby, the valve body 70 can be largely moved in the upstream and downstream direction of the flow passage 32.

  In addition, since the elastic piece 71 can be formed thin (small in the radial direction) along the side surface of the valve portion 72, the opening portion 52a into which the valve portion 72 and the valve portion 72 are fitted has a large diameter. Can be formed.

  As described above, according to the check valve mechanism including the valve body 70 and the opening 52a, even if the contents are high in viscosity such as a solvent such as jelly or ink, it can be poured out smoothly.

DESCRIPTION OF SYMBOLS 1 ... Storage bag, 2 ... Storage bag main body, 3 ... Outlet member, 31 ... Cylindrical main body, 32 ... Flow path, 33 ... Introduction port (base end side opening), 40 ... Joint part, 41 ... Recessed part (locking) Part), 41a ... projection part (locking part), 50 ... valve seat part, 51 ... hinge part, 54 ... tongue piece (locking part), 54a ... locking hole (locking part), 60 ... valve body.

Claims (4)

A spout member provided to be joined to the containing bag body for containing the contents,
The spout member is a cylindrical main body having a flow passage through which the contents flow,
A joint portion provided at a base end portion of the cylindrical main body and configured to be connectable to the containing bag main body;
A check valve disposed on the flow passage and allowing the contents to be poured out;
The check valve includes a valve seat portion provided in the cylindrical main body via a hinge portion so as to be rotatable in a direction to close the proximal end opening of the cylindrical main body, and a pouring in the flow passage. A valve body that is provided on the downstream side in the direction and is biased in the direction of seating on the valve seat portion to open and close the flow passage,
A spout member comprising an engaging portion that maintains the proximal end side opening of the cylindrical body by engaging the valve seat portion and the joint portion with each other. The pouring member according to claim 1,
The spout member, wherein the locking portion is provided at a position where the valve seat portion and the locking portion can be locked with each other when the locking portion is locked to each other. The pouring member according to claim 1 or 2,
The spout member, wherein the hinge portion is connected to a joint portion of the cylindrical main body at a position where the hinge portion can be joined to the storage bag main body. An accommodation bag, wherein the spout member according to any one of claims 1 to 3 is joined to an accommodation bag body made of a film-like member.