JP2001031123A - Adapter stopper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adapter stopper wherein a weld mark is hard to occur in the stopper body when the stopper is injection molded. SOLUTION: In a stopper body 100, a fitting cylinder is vertically formed at the lower end of a circumferential wall cylinder 110, and a flange 120 having knurling 121 on its outer periphery is provided on the outer periphery of the cylinder 110, while under the inner side of the cylinder 110, a sealing plate wherein a plunge slide hole 131 is provided at the center thereof, and a plurality of fins each having the same width are radially provided around the hole 131 to provide a passage hole 132 between adjacent fins, and the surface of fin 133 forming a gate is located at a point different from that of the other fin, and a contact ring 134 is provided on the underside of the outer side of the fin, while a plurality of radial ribs are provided on the underside of the outer side of the ring 134 so as to reach the inner periphery of an inner cylinder, and also an inner cylinder which has a contact surface on the outer periphery under the cylinder 110 and a ring shaped fitting part on the inner periphery thereof is vertically provided. A dust cap 200 is fitted in an opening at the top end of the cylinder 110, and a plunger 160 is inserted into a plunger slide hole of the sealing plate, while a diaphragm valve 170 is closely fitted in the contact ring under the sealing plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adapter plug used by being fitted to a spout of a liquid container such as a bag-in-box in which an inner bag is accommodated in an outer box used for liquid contents. It is.

[0002]

2. Description of the Related Art Conventionally, as a cap for an adapter to be attached to a liquid container such as a bag-in-box, a cap provided with a dispenser function is known. The plug body is fitted to the attached spout, and a dust cap is fitted to the upper end opening of the plug body. The plug body has a plunger sliding hole in the center, and a sealing plate having a plurality of flow holes on the outer periphery thereof is provided inside the peripheral wall cylinder. A plunger is slidably mounted, and a diaphragm balm is mounted on the lower portion of the plunger, which is in close contact with a contact ring provided outside a flow path hole on the lower surface of the closing plate, and the flow path hole is sealed. Have been.

In this state, the liquid container is transported or stored. When the liquid content contained in the inner bag is poured out, as shown in FIG. Remove the dust cap from
This is performed by inserting a connector (400) into 0), connecting a tube to this connector, and suctioning with a pump. At this time, the inner plug (410) of the connector pushes the plunger (160) to push the diaphragm balm (1).
70) is depressed at the center, whereby a gap is formed between the plug body and the diaphragm balm, and the liquid content in the inner bag flows into the connector through the flow path holes (171, 132). It is poured out. In addition, the container for liquid at the time of transportation or storage uses a plunger (160) as shown in FIG.
Is in the raised position and the diaphragm balm (170)
The tip of a contact ring (134) provided on the lower surface of the closure plate (130) of the plug body comes into close contact with the upper surface of the plug body to prevent liquid leakage.

[0004]

However, in the above-mentioned adapter plug, a plurality of flow passage holes are provided around a plunger sliding hole at the center of the plug main body, and the plug main body is made of a thermoplastic material. When injection molding with resin, a weld mark is formed on the sealing plate outside the flow passage hole of the plug body (also referred to as a weld line, an incompletely fused portion generated at the junction of two or more flows of molten material). In addition, accidents such as poor sealing and cracks caused by the weld mark may occur.

Incidentally, the structure of the plug body of the above-mentioned conventional adapter plug is, for example, as shown in FIGS. 4 (a) and 4 (b), a threaded portion (111) is formed on the outer peripheral surface of the peripheral wall tube (110). And a flange (120) having a knurl (121) formed by forcibly forming an outer periphery is provided around the lower end of the fitting tube (140) at the lower end of the peripheral wall tube. A plunger sliding hole (131) is provided at the center, a plurality of fins (133) are radially provided on the outer periphery of the plunger sliding hole, and a flow path hole (132) is provided between the fins. The width of the fin forming the gate (101) is made larger than the width of the other fins, and the sealing plate (1) provided with the contact ring (134) on the lower surface outside the fin.
30), and an inner cylinder (150) having a close contact surface (151) with the spout of the inner bag on the outer peripheral surface on the lower surface of the peripheral wall cylinder and having an intermittent fitting portion (152) on the inner peripheral surface is suspended. Was something.

The present invention solves the above-mentioned problem of the conventional adapter plug, and provides an adapter plug which is less likely to generate a weld mark at the time of injection molding on the plug body, has good sealing properties, and is easy to handle. Is what you do.

[0007]

That is, the first aspect of the present invention is as follows.
The invention relates to an adapter plug comprising a dust cap, a plug body, a plunger, and a diaphragm balm, which is fitted to a spout attached to an inner bag, wherein the plug body is screwed to an outer peripheral surface of a peripheral wall cylinder. Having a flange that forms a knurl on the outer periphery of the fitting tube at the lower end thereof at the lower end of the peripheral wall tube, and has a plunger sliding hole at the center below the inside of the peripheral wall tube, A plurality of fins of the same width are radially provided on the outer periphery of the plunger sliding hole, and a flow path hole is provided between the fins, and a surface of one of the fins forming a gate is thicker than a surface of another fin. The contact position is provided on the lower surface at the outer position of the fin, and a plurality of radial ribs are provided on the inner circumference of the inner cylinder on the extension of the flow path hole on the lower surface outside the contact ring. Sealing plate provided to reach The inner cylinder has a close contact surface with the spout of the inner bag on the outer peripheral surface on the lower surface of the peripheral wall cylinder, and an inner cylinder having a ring-shaped fitting portion on the inner peripheral surface is vertically provided, and the dust cap is provided for the plug main body. The plunger is fitted into the upper end opening of the peripheral wall cylinder, the plunger is inserted into the plunger sliding hole of the sealing plate of the plug body, and the diaphragm balm contacts below the sealing plate of the plug body. An adapter plug having a close contact with a ring and fitted and fixed to a ring-shaped fitting portion of an inner cylinder of the plug main body.

[0008] A second invention of the present invention is the adapter plug, characterized in that the knurl on the outer periphery of the flange of the plug main body is formed by a mold having a slide core structure.

[0009]

According to the adapter plug of the present invention, the width of a plurality of fins radially provided on the outer periphery of the plunger sliding hole of the sealing plate of the plug body is made different from the conventional one, and the contact on the lower surface of the sealing plate is formed. A plurality of radial ribs are provided on the extension of the flow path hole outside the ring so as to reach the inner circumference of the inner cylinder, so that the flow of the molten material in the mold during injection molding is good, and Weld marks are less likely to occur on the main body during injection molding, the reproducibility of the molded shape is good, the strength is strong, and the sealability is good when fitted to the spout of the liquid container.

[0010] Further, unlike the conventional intermittent shape, a ring-shaped fitting portion is provided on the inner peripheral surface of the plug body, and the diaphragm balm is firmly fitted and fixed to this fitting portion. It is possible to prevent the falling off and the setting failure, and the sealing performance is improved.

In addition, since the knurls on the outer periphery of the flange of the plug body are formed by a mold having a slide core structure instead of the conventional forcible punching, the reproducibility of the molding shape is good and a large contact cross section can be obtained. Easy to grasp and handle. Also,
Of the plurality of fins, the surface of the fin forming the gate is changed in the direction of making the thickness smaller than the surfaces of the other fins, and the remaining gate does not hinder the function.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The adapter plug of the present invention (10)
As shown in FIG. 1, the device comprises a dust cap (200), a plug body (100), a plunger (160), and a diaphragm balm (170), and is thermally fused to an inner bag such as a bag-in-box. The dust cap and the plug body are selected from the material according to the purpose of use and are injection molded using a thermoplastic resin such as polyethylene or polypropylene. is there.

[0013] The plug body (100) of one embodiment.
2 (a) to 2 (c), the outer peripheral surface of the peripheral wall tube (110) has a threaded portion (111) of a normal male screw with a connector fixing cap, as shown in FIGS. At the lower end, a normal ring-shaped fitting portion (14
A knurl (121) in which a fitting cylinder (140) having 1) is vertically provided on the lower surface and formed on the outer periphery by a mold having a slide core structure.
And a plunger sliding hole (131) in the center below the inside of the peripheral wall cylinder,
Usually, a plurality of six fins (133) of the same width are radially provided on the outer periphery of the plunger sliding hole (131), and a flow path hole (132) is provided between the fins. The surface position of the fin forming the gate is changed in a direction in which the thickness of the surface of the fin forming the gate is smaller than the surface of the other fin. For example, when forming the gate on the upper surface of the fin, the surface of the fin forming the gate is changed to the surface of the other fin. When forming the gate on the lower surface, the surface of the fin forming the gate is raised above the surface of the other fin, and a contact ring (134) with the diaphragm balm is provided on the lower surface at a position outside the fin.
A sealing plate (6) which is usually provided with six ribs (135) for improving the flow of a plurality of radial molten materials on the extension of the flow path hole on the lower surface outside the contact ring so as to reach the inner circumference of the inner cylinder. 130), the inner cylinder (150) having a close contact surface (151) with the spout of the inner bag on the outer peripheral surface on the lower surface of the peripheral wall cylinder, and having a ring-shaped fitting portion (152) with the diaphragm balm on the inner peripheral surface. ).

Next, as shown in FIG. 1, a dust cap (200) is fitted to the upper end opening of the peripheral wall cylinder (110) of the above-mentioned plug body (100), and the plunger of the closing plate (130) is fitted. The plunger (160) is inserted into the sliding hole (131), and the diaphragm balm (170) is brought into close contact with the contact ring (134) below the sealing plate to make the inner cylinder (15).
0), the adapter plug (10) of the present embodiment is manufactured by fitting it to the ring-shaped fitting portion (152), and this plug is fitted to the spout of the water-filled inner bag to form a seal. Was evaluated. A heat resistance of 50 ° C. or a normal temperature for 5 days was performed by an inverted standing test and a pressure reduction test, but no liquid leaked. Further, when the dust cap was removed, a connector was inserted into the plug body and connected, and suction was performed with a pump, the liquid content was successfully discharged.

[0015]

According to the adapter plug of the present invention, the width of a plurality of fins provided on the outer periphery of the plunger sliding hole of the sealing plate of the plug body is the same, and the width of the contact ring on the lower surface of the sealing plate is reduced. A plurality of radial ribs are provided on the outside, the flow of the molten material in the mold during injection molding is good, the weld mark is not easily generated, the shape reproducibility and strength are strong, and the plug with good sealing performance It is.

Further, the diaphragm balm is firmly fitted and fixed to the ring-shaped fitting portion on the inner peripheral surface of the inner cylinder of the plug body, preventing falling off and setting failure, and having good sealing performance. In addition, the knurls on the outer periphery of the flange of the plug body are formed by a mold having a slide core structure, so that the reproducibility of the formed shape is good, the contact cross section can be made large, and it is easy to grasp and handle.

[Brief description of the drawings]

FIG. 1 is a side view in which a part of an adapter plug of one embodiment of the present invention is cut away.

2A is a plan view of a plug main body of the adapter plug of one embodiment of the present invention, FIG. 2B is a partially cutaway side view, and FIG. It is a bottom view.

FIG. 3 is an explanatory view showing a state in which an adapter connector is attached to a plug body fitted into a spout of an inner bag.

FIG. 4 (a) is a plan view of a plug body of a conventional adapter plug, and FIG. 4 (b) is a bottom view.

[Explanation of symbols]

 Reference numeral 10: Adapter plug 20: Inner bag 100: Plug body 101: Gate 110: Peripheral wall tube 111: Screwed portion 120: Flange 121: Knurl 130: Closing plate 131: Plunger Sliding holes 132, 171 Flow passage holes 133 Fins 134 Contact rings 135 Ribs 140 Fitting tubes 141, 152 Fitting parts 150 Inner cylinder 151 Close contact surfaces 160 … Plunger 170… diaphragm balm 200… dust cap 300… spout 400… connector 410… inner plug

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E064 BA21 EA21 HR01 HS04 3E067 AA03 AB26 BA05C BA12B BB02C BB14B CA24 EB32 FB15 3E084 AA12 AB01 BA02 CA01 CB02 CC03 CC08 DA01 DB14 DC03 EA02 EB02 EC03 FA09 GB01 GA03 GB03 LA17 LB03 LC01 LD30

Claims (2)

[Claims] 1. An adapter plug comprising a dust cap, a plug body, a plunger, and a diaphragm balm, which is fitted to a spout attached to an inner bag, wherein said plug body is screwed onto an outer peripheral surface of a peripheral wall cylinder. A flange which forms a knurl on the outer periphery of the fitting cylinder at the lower end of the peripheral wall cylinder, and has a plunger sliding hole in the center below the inner periphery of the peripheral wall cylinder; A plurality of fins having the same width are radially provided on the outer periphery of the plunger sliding hole, and a flow path hole is provided between the fins. The surface position is changed in the direction of reducing the thickness, a contact ring is provided on the lower surface at the outer position of the fin, and a plurality of radial ribs are formed on the inner periphery of the inner cylinder on the extension of the flow path hole on the lower surface outside the contact ring. Blockade to reach An inner cylinder having a close contact surface with the spout of the inner bag on the outer peripheral surface on the lower surface of the peripheral wall cylinder and having a ring-shaped fitting portion on the inner peripheral surface, and the dust cap is attached to the plug body. The plunger is inserted into the plunger sliding hole of the sealing plate of the plug body, and the diaphragm balm is inserted below the sealing plate of the plug body. An adapter plug which is brought into close contact with a contact ring and fitted and fixed to a ring-shaped fitting portion of an inner cylinder of the plug body. 2. The adapter plug according to claim 1, wherein the knurl on the outer periphery of the flange of the plug main body is formed by a mold having a slide core structure.