JPH0688598B2 - Liquid container - Google Patents

Description

TECHNICAL FIELD The present invention relates to a liquid container in which a molded inner container is surrounded by a synthetic resin material.

<Prior Art> Conventionally, a liquid container is formed of a synthetic resin material such as polypropylene, and is provided with an inner container having a bottom and a wide mouth at the upper end. A pouring tube part that communicates with and is provided, and a screw is engraved on the outer circumference of this pouring tube part, and the mouth of the inner container squeezes from the upper end shoulder wall of the inner container toward the center, and then projects upward A shoulder member that is used as a mouth cylinder, has a cylindrical outer case that engraves an outer peripheral screw on the outer circumference of the mouth cylinder, surrounds the body of the inner container, and surrounds the upper part of the inner container and is coupled to the upper end of the outer case. A wide mouth is formed at the center of the upper end of the shoulder member so as to penetrate the mouth shoulder portion of the inner container, and the shoulder member and the outer case form an outer body, which is screwed to the outer peripheral screw of the mouth cylindrical portion of the inner container. And a ring-shaped shoulder screw for fixing the inner container and the shoulder member of the outer body to each other, while the bottom of the inner container is attached. Is provided with a bottom member that is coupled to the lower end of the outer case, and a gap is provided between the inner container and the outer body and the inner container and the bottom member.
The gap is filled with a heat insulating material such as urethane foam, and a through hole is formed in the exterior body corresponding to the front wall of the pouring tube portion of the inner container, and the pouring tube portion of the pouring tube portion is penetrated from the front side. A faucet member that is screwed onto a screw and has a discharge port is provided below, and a lid is detachably attached to the mouth cylinder part of the inner container. Instead of high accuracy, a complicated and large-sized injection mold is required, which is expensive and cannot meet the molding cost. Therefore, blow molding, which can form this inner container at a much lower cost than injection molding, was considered, but this blow molding has poor dimensional accuracy, and even if the dimensional accuracy is still poor in the case of a wide mouth such as a mouth cylinder, Although it is acceptable, if the dimensional accuracy is very poor for the spout cylinder and the screw on its outer circumference, which is much smaller than the mouth cylinder, it is completely unacceptable and the connection with the faucet member was insufficient, resulting in a series of defective products. .

<Object of the Invention> The present invention has been made in view of the above points, and it is an object of the present invention to provide a liquid container in which defective products are reduced and manufacturing costs are reduced.

<Structure of the Invention> According to the present invention, the injection cylinder portion of the inner container is injection-molded in a pair different from the inner container, while the inner container is blow-molded and the injection cylinder portion is injection-molded. The purpose of the present invention is to achieve the object only by a structure in which the lower front wall of the above is insert-molded and then communicated with the inside of the inner container.

<Examples of the Invention> Examples of the present invention will be described below with reference to the drawings. The liquid container 1 includes an inner container 2, an exterior body 3 that surrounds the inner container, a bottom member 4, a faucet member 5 that discharges the liquid in the inner container, and a lid body 6 that covers the mouth of the inner container. ing.

The inner container 2 is blow-molded from a synthetic resin material into a cylindrical shape with a bottom, and a mouth tube portion 7 protruding upward from a shoulder wall squeezing the upper end of the body toward the center is provided, and a lid is provided on the outer circumference of the mouth tube portion. Body screws 8 are engraved. The inner container 2 is provided with a step portion between the shoulder wall and the mouth tube portion, and a peripheral wall forming a wide mouth at the center of an exterior body described later is brought into contact with the upper wall of the step portion.
The inner container 2 is provided with a tightening screw portion 9 formed by engraving a male screw to be screwed into a tightening member described later on the lower wall at the center of the bottom. As shown in FIG. 2a, the inner container 2 is a mold for forming a slot 10 in the lower front wall during blow molding. The inside of the slot 10 is injection molded. The pouring tube portion separate from the container is insert-molded, and the pouring tube portion is integrally attached to the inner container as shown in FIG. 2b. The spouting cylinder portion 11 is injection-molded with a synthetic resin material, and has a hollow inner cylinder shape as shown in FIG. The rear end wall is provided with a through hole 13 in the center, and a thin collar portion 14 is provided on the outer periphery. This pouring barrel
The collar portion 14 of 11 is a slot 10 in the lower front wall when the inner container 2 is blow molded.
The injection cylinder part 11 is insert-molded into the inner container 2 by tightly fitting it inside. The through hole at the center of the rear end wall of the pouring tube portion 11 and the inside of the inner container 2 are penetrated by post-processing after insert molding, but they may be penetrated at the time of insert molding.

The outer casing 3 is formed of a synthetic resin material by blow-molding a body portion and a shoulder portion, and the outer wall of the shoulder portion has a flat plate shape, and the mouth cylinder portion 7 of the inner container 2 can be penetrated in the center thereof. Has a wide mouth. The wide mouth is formed to have a diameter that barely penetrates the screw thread of the lid screw 8 engraved on the outer periphery of the mouth cylinder portion 7 to minimize rattling between the wide mouth and the mouth cylinder portion. The outer casing 3 has a predetermined gap between the shoulder portion and the body portion of the inner container 2 excluding the mouth cylinder portion 7. The outer casing 3 has a plurality of protrusions on the outer peripheral wall of the lower end, which are fitted in the inner grooves of the bottom member described later. The exterior body 3 is the pouring cylinder of the inner container
A through hole is formed in the lower part corresponding to the front wall of 11. The faucet member 5 is integrally hollow with a horizontal tubular portion 15 that is screwed into the tap 12 of the tapping tubular portion 11 and an internally hollow inclined tubular portion 16 that hangs obliquely downward from the tip of the horizontal tubular portion. The faucet body 17 is formed, a valve body 18 that opens and closes between the horizontal tubular portion 15 and the inclined tubular portion 16 of the faucet body, and an operating lever 19 that operates the valve body. The faucet body 17 penetrates through the through hole from the front of the front wall of the exterior body 3 and communicates with the pouring cylinder portion 11, and the liquid in the inner container 2 is slid by the operation lever 19 so that the inclined cylinder portion 16 of the faucet body 17 is in contact.
Is ejected from the tip. The faucet body 17 penetrates through the through hole of the exterior body 3 and communicates with the spout cylinder portion 11. The spout cylinder portion 11 penetrates through the through hole of the exterior body 3 and communicates with the faucet body. Good.

The bottom member 4 has a plurality of inner grooves formed in the inner peripheral wall of the upper end for fitting the protrusions of the outer casing 3, and a through hole is formed in the lower portion corresponding to the bottom wall of the tightening screw portion 9 of the inner container 2. is doing. The bottom member 4 is provided with a predetermined gap between the bottom member 4 and the bottom portion of the inner container excluding the through hole portion.

Reference numeral 20 denotes a tightening member, and as shown in FIG. 1, a female screw for screwing onto the male screw of the tightening screw portion 9 of the inner container 2 is engraved on the inner wall, and the inner wall is formed on the peripheral wall forming the through hole of the bottom member 4. The inner container 2 is fixedly held by being screwed to the tightening screw portion 9 of the inner container 2 in a state where the lower portion is in contact with the inner container 2. Reference numeral 21 denotes a heat insulating material such as urethane foam, which is loaded in the gap between the inner container 2 and the exterior body 3 and the gap between the inner container 2 and the bottom member 4, respectively.

The lid 6 has a cylindrical shape with a bottom, and screws are engraved on the inner peripheral wall of the opening. The lid 6 is inverted and screwed to the screw 8 for the lid of the mouth tubular portion 7 of the inner container 2 in a removable manner.

<Effects of the Invention> In the present invention, the inner container and the spouting cylinder part with the screw engraved on the outer periphery are separately formed, and the spouting cylinder part is injection-molded to blow-mold the inner container and the inner container. After the injection tube is insert-molded on the lower front wall of the, the inside of the container and the inside of the injection tube are connected to each other, so the accuracy of the injection tube is high and the screw connection with the faucet member is ensured. It is possible to reduce defective products sufficiently. Also, only the spouting cylinder that requires a small precision is injection molded, and the inner container is formed by inexpensive blow molding, and at the same time the spouting cylinder is insert-molded into the inner container, resulting in a large part cost. In addition, the inner container and the pouring tube portion can be reliably coupled.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial vertical cross-sectional view of an embodiment of the present invention, and FIG. 2A is an enlarged partial cross-sectional view of an inner container and a pouring cylinder portion of the present invention before insert molding. FIG. 2B is an enlarged partial sectional view of the inner container and the pouring cylinder portion after the insert molding of the present invention. 1 ... Liquid container, 2 ... Inner container, 3 ... Exterior body, 4 ...
Bottom member, 5 ... Faucet member, 6 ... Lid, 7 ... Base cylinder part, 9 ... Tightening screw part, 10 ... Groove hole, 11 ... Pour out cylinder part, 12 ... Faucet member Screw, 13 ... through hole, 14 ... collar, 17 ... faucet body, 18 ... valve body, 19 ... operating lever,
20 …… tightening member,

Claims (1)

[Claims] 1. A hollow inner container made of a synthetic resin material in which a mouth cylinder is formed in the center of an upper shoulder wall, and a pouring cylinder part for communicating the inside and the outside of the inner container is projected on a lower front wall of the inner container. The outer cylinder of the inner container is provided with an external body that surrounds the body and shoulder of the inner container, and a through hole is formed in the front wall of the outer container that corresponds to the inner cylinder of the inner container. On the other hand, a faucet member that penetrates the through hole from the front of the exterior body and is screwed into the screw of the pouring cylinder portion and discharges the liquid in the inner container to the outside through the pouring cylinder portion is provided. , The bottom cylinder of the inner container is connected to the upper end mouth of the outer body, and the bottom member that covers the bottom of the inner container is connected to the lower end of the outer body, and the lid is detachably attached to the mouth cylinder of the inner container. In the liquid container, the injection cylinder part of the inner container is injection-molded separately from the inner container, while the inner container is blow-molded and injection-molded. Later part insert-molded to the lower front wall of the inner container and the liquid container, characterized in that communicates within the inner container.