JP6389053B2 - Cock equipment - Google Patents

Description

  The present invention relates to a cock device that is provided in a liquid container and that pours the content liquid from the mouth portion of the container or closes the mouth portion, and in particular, rotates an inner cylinder lightly press-fitted into an outer cylinder around an axis. It is related with the cock apparatus opened and closed by this.

  For example, a bag-in-box is known as a container that stores liquids such as beverages, detergents, and chemicals and dispenses them as necessary (see Patent Documents 1 to 3). The bag-in-box is a container in which a flexible resin inner bag is accommodated in a cardboard outer box, and is widely used for business use and home use because it is lightweight, strong and easy to discard. A mouth portion is provided at one location of the inner bag. A cock device for opening and closing is attached to the mouth.

  As disclosed in Patent Documents 1 to 3 and the like, in this type of cock device, an outer cylinder is integrally provided in a lid-like cap portion that closes the mouth portion of the inner bag. The axis of the outer cylinder is arranged in parallel with the outer surface of the plug portion. A communication hole is formed penetrating from the plug portion to the inner peripheral surface of the outer cylinder. An inner cylinder is press-fitted to the outer cylinder so as to be rotatable around an axis, and a lever-like knob is integrally provided at one end of the inner cylinder. The inner cylinder opens and closes the communication hole by pinching the knob and rotating it around the axis. Eventually, the cock device is opened and closed.

Japanese Patent No. 4021531 Utility Model Registration No. 3173157 Utility Model Registration No. 3177115

  In this type of cock device, the inner cylinder and the outer cylinder rub against each other at the time of opening and closing, so that rubbing marks are easily formed on the outer peripheral surface of the inner cylinder or the inner peripheral surface of the outer cylinder. Therefore, as the opening and closing are repeated, the outer peripheral surface of the inner cylinder or the inner peripheral surface of the outer cylinder becomes rough, and the frictional resistance at the time of opening and closing increases, which may make it difficult to open and close. In addition, the required force for opening and closing operations easily varies depending on the season. For example, the required force for opening and closing operations tends to be greater in winter than in summer.

In order to solve the above problems, the present invention provides a cock device for opening and closing a mouth portion of a liquid container, wherein the mouth plug portion is attached to the mouth portion, and an axis line is formed on an outer surface of the mouth plug portion. And a body member that includes a communication hole formed in the inner peripheral surface of the outer cylinder from the plug portion, and is press-fitted into the outer cylinder so as to be rotatable around the axis. And a cock member that integrally includes a knob extending from one end of the inner cylinder so as to intersect the axis, and at least one of the body member and the cock member is configured to open and close the communication hole. Further, a slip agent is added to the main component resin.
According to this cock device, the sliding between the inner cylinder and the outer cylinder at the time of opening and closing can be improved, and the formation of rubbing marks on the outer peripheral surface of the inner cylinder or the inner peripheral surface of the outer cylinder is suppressed. Or it can be prevented. Therefore, it is possible to suppress or prevent the surface roughness of the outer peripheral surface of the inner cylinder or the inner peripheral surface of the outer cylinder, and thus the frictional resistance during opening / closing, from increasing according to the number of opening / closing operations. Therefore, the ease of opening and closing operations can be maintained even when the number of times of opening and closing reaches a large number. In addition, it is possible to suppress fluctuations in the required force for the opening / closing operation depending on the season, and the opening / closing operation can be performed with a force not much different from that in the summer in the winter.

The slip agent preferably contains erucic acid amide.
It is preferable that the body member contains 1 to 5 parts by mass of the slip agent with respect to 100 parts by mass of the main resin component.
The cock member preferably contains 0.5 to 10 parts by mass of the slip agent with respect to 100 parts by mass of the main resin.
Accordingly, it is possible to reliably suppress or prevent the opening / closing operation from being difficult depending on the number of times of opening / closing the cock device, and to maintain the ease of the opening / closing operation reliably.

  ADVANTAGE OF THE INVENTION According to this invention, it can suppress or prevent that it becomes difficult to open and close according to the frequency | count of opening and closing of a cock apparatus, and the ease of opening and closing operation can be maintained.

FIG. 1 shows a first embodiment of the present invention and is a perspective view of a bag-in-box provided with a cock device. FIG. 2 is an exploded perspective view of the cock device. FIG. 3 is a front view showing the cock device in a closed position by a solid line and an open position by a two-dot chain line. Fig.4 (a) is a longitudinal cross-sectional view which follows the IV-IV line | wire of FIG. 3 which shows the said cock apparatus in the state of a closed position. FIG. 4B is a longitudinal sectional view showing the cock device in the open position.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 4 show a first embodiment of the present invention. As shown in FIG. 1, a bag-in-box 1 (container) includes an outer box 2 made of cardboard and an inner bag 3 made of flexible resin. An inner bag 3 is accommodated in the outer box 2. The inner bag 3 is filled with a liquid (content liquid) such as a beverage, a detergent, or a medicine. Here, drinking hot spring water is contained as the content liquid. The temperature at the time of filling this hot spring water is, for example, about 50 ° C. to 90 ° C., and preferably about 65 ° C. to 70 ° C. A substantially cylindrical mouth portion 4 made of a hard resin is provided on one side portion of the inner bag 3. A cock device 5 is joined to the mouth 4 by a stopper. A cock outlet 2 b is formed on one side of the outer box 2. When the bag-in-box 1 is used, the cock device 5 is projected outward from the cock outlet 2b.

  As shown in FIG.2 and FIG.3, the cock apparatus 5 is comprised by 2 members, the body member 5a and the cock member 5b. The body member 5a integrally includes the plug portion 10 and the outer cylinder 21. The plug portion 10 has a circular lid shape. As shown in FIG. 1, the mouth plug portion 10 is attached to the mouth portion 4 with a stopper to close the mouth portion 4.

As shown in FIGS. 2 and 3, an outer cylinder 21 is provided at the center in the left-right direction of the plug portion 10. The outer cylinder 21 has a cylindrical shape (cylindrical shape) with both ends opened. The axis L ₀ of the outer cylinder 21 is directed in the vertical direction along the outer surface 11 of the plug portion 10.

  As shown in FIG. 2, a substantially rectangular continuous tube portion 13 is formed so as to protrude from a substantially central portion of the outer surface 11 of the plug portion 10. The plug portion 10 and the peripheral side portion of the outer tube 21 are continuously connected to each other through the continuous tube portion 13.

  As shown in FIG. 4, a communication hole 13 a is formed inside the continuous cylinder portion 13. The communication hole 13 a penetrates from the plug portion 10 to the inner peripheral surface of the outer cylinder 21. An air hole 21e is formed at a position facing the communication hole 13a on the peripheral side portion of the outer cylinder 21 at a distance of 180 °.

  As shown in FIG. 2, the cock member 5 b integrally includes an inner cylinder 22 and a knob 24. The inner cylinder 22 has a cylindrical shape (cylindrical shape) that is coaxial with the outer cylinder 21 and longer than the outer cylinder 21. An opening / closing hole 22 a is formed in the peripheral side portion of the inner cylinder 22. The open / close hole 22 a penetrates from the outer peripheral surface of the inner cylinder 22 to the inner peripheral surface.

  As shown in FIGS. 3 and 4, the inner cylinder 22 is lightly press-fitted into the outer cylinder 21 and is rotatable with respect to the outer cylinder 21. When the outer peripheral surface of the inner cylinder 22 is in close contact with the inner peripheral surface of the outer cylinder 21, the space between the outer cylinder 21 and the inner cylinder 22 is sealed in a liquid-tight manner. Note that the seal structure between the outer cylinder 21 and the inner cylinder 22 has the same configuration as that disclosed in the aforementioned Patent Document 3. A lower end portion of the inner cylinder 22 protrudes downward from the outer cylinder 21.

The outer cylinder 21 and the inner cylinder 22 constitute a double cylindrical nozzle portion 20. An inner space of the inner cylinder 22 constitutes a nozzle hole 29. The opening at the lower end of the inner cylinder 22 constitutes the discharge port 29 a of the nozzle hole 29.
Note that the opening at the lower end of the outer cylinder 21 may form the discharge port of the nozzle hole 29 by the outer cylinder 21 projecting downward from the inner cylinder 22.

  As shown in FIG. 3, the upper end portion of the inner cylinder 22 protrudes from the upper end portion of the outer cylinder 21, and the cap portion 23 is integrally provided there. The cap portion 23 has a substantially truncated cone shape, and its bottom portion has a larger diameter than the inner cylinder 22 and is approximately equal to the outer diameter of the outer cylinder 21. The bottom portion of the cap portion 23 is in contact with the upper end edge of the outer cylinder 21. The cap portion 23 closes the upper end portion of the inner cylinder 22 and thus the upper end portion of the nozzle hole 29 (the end portion opposite to the discharge port 29 a) and the upper end portion of the outer cylinder 21.

As shown in FIG. 2, a knob 24 is integrally provided on the cap portion 23. The knob 24 has a lever shape extending from the cap portion 23 so as to intersect the axis L _{0 of the} nozzle 20.

By adding a rotational torque to the cock member 5b Squeeze the knob 24, it is possible to rotate the cock member 5b around the axis L _0. Thereby, the cock device 5 can be opened and closed. That is, as shown by a two-dot chain line in FIG. 3, when the knob 24 is directed so as to follow the right side portion of the outer surface 11 of the plug portion 10, for example, the cock member 5b is in the open position. As shown in FIG. 4B, in this open position, the second communication hole 22a coincides with the first communication hole 13a, so that the communication hole 13a and the nozzle hole 29 communicate with each other through the opening / closing hole 22a. As a result, the content liquid in the bag-in-box 1 can be poured out from the discharge port 29a through the mouth portion 4, the communication hole 13a, the opening / closing hole 22a, and the nozzle hole 29 in order.

  As shown by the solid line in FIG. 3, when the knob 24 is directed so as to follow the left side portion of the outer surface 11 of the plug portion 10, for example, the cock member 5b is in the closed position. As shown in FIG. 4A, in this closed position, the open / close hole 22a is displaced by 180 °, for example, in the circumferential direction of the nozzle portion 20 with respect to the communication hole 13a, so that the communication hole 13a is blocked by the peripheral wall of the inner cylinder 22. Can be removed. Therefore, the dispensing of the content liquid is stopped or prevented. At this time, liquid can be drained from the inside of the nozzle hole 29 by matching the opening / closing hole 22a with the air hole 21e.

Here, the composition of the body member 5a and the cock member 5b will be described.
The main component of the body member 5a is a resin, preferably a polyolefin resin such as polyethylene or polypropylene. Further, a slip agent is added to the body member 5a. Preferably, the slip agent of body member 5a contains erucic acid amide (unsaturated fatty acid amide). Preferably, the body member 5a contains 1 to 5 parts by mass of a slip agent with respect to 100 parts by mass of the main component resin. More preferably, the body member 5a contains 1 to 3 parts by mass of a slip agent with respect to 100 parts by mass of the main component resin.

  The main component of the cock member 5b is a resin, preferably a polyolefin resin such as polypropylene or polyethylene, or polystyrene. Further, a slip agent is added to the cock member 5b. Preferably, the slip agent of the cock member 5b contains erucic acid amide (unsaturated fatty acid amide). Preferably, the cock member 5b contains 0.5 to 10 parts by mass of the slip agent with respect to 100 parts by mass of the main component. More preferably, the cock member 5b contains 2 to 5 parts by mass of the slip agent with respect to 100 parts by mass of the main component.

  According to the cock device 5, since the slip agent is added to the body member 5a and the cock member 5b, the slip between the inner cylinder 22 and the outer cylinder 21 at the time of opening and closing can be improved. It is possible to suppress or prevent the formation of rubbing marks on the outer peripheral surface and the inner peripheral surface of the outer cylinder 21. Therefore, it is possible to suppress or prevent the surface roughness of the outer peripheral surface of the inner cylinder 22 and the inner peripheral surface of the outer cylinder 21, and thus the frictional resistance at the time of opening and closing, from increasing according to the number of times of opening and closing. Therefore, even when the number of times of opening and closing reaches a large number of times, it is possible to suppress or prevent the required torque for opening and closing from increasing and making it difficult to open and close, and the ease of opening and closing operations can be maintained. In addition, it is possible to suppress fluctuations in the required force for the opening / closing operation depending on the season, and the opening / closing operation can be performed with a force not much different from that in the summer in the winter. Furthermore, a sufficient sealing property between the inner cylinder 22 and the outer cylinder can be ensured.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the slip agent may be added to at least one of the body member 5a and the cock member 5b of the cock device 5. Therefore, the slip agent may be added to the body member 5a, and the slip agent may not be added to the cock member 5b. Conversely, the slip agent may not be added to the body member 5a, and the slip agent may be added to the cock member 5b.
The main component of the slip agent is not limited to erucic acid amide, but may be oleic acid amide, stearic acid amide or the like.

Examples will be described. However, the present invention is not limited to the following examples.
In Example 1, the slip agent was added to the body member 5a and the cock member 5b, and the opening / closing operability according to the addition amount was evaluated.
The main component of the body member 5a is low-density polyethylene, and a slip agent containing erucic acid amide was added thereto. The compounding ratio was 1 to 5 parts by mass of the slip agent with respect to 100 parts by mass of the main component resin.
The main component resin of the cock member 5b is polypropylene, and a slip agent containing erucic acid amide was added thereto. The compounding ratio was 0.5 to 10 parts by mass of the slip agent with respect to 100 parts by mass of the main resin.
After the inner cylinder 22 of the cock member 5b was press-fitted into the outer cylinder 21 of the body member 5a to assemble the cock device 5, it was left to stand for 10 days.
The environmental temperature was about 23 ° C. ± 10 °.
And the required operation force for opening and closing the cock member 5b was measured.
A digital push-pull gauge MODEL-RX manufactured by Aiko Engineering Co., Ltd. was used as a measuring instrument. The hook of the measuring instrument is hooked on the tip of the knob 24 in the closed position, and the measuring instrument is pulled in the opening direction with respect to the cock device 5 so that the pulling force when the cock member 5b starts to rotate (maximum static frictional force). ) Was measured.
The measurement was performed at an initial stage before repeating the opening / closing operation and at a later stage after repeating the opening / closing operation many times.
The number of opening / closing operations up to the later stage was 100 times.
The results are shown in Tables 1 and 2.

As can be seen from Tables 1 and 2, by including an appropriate amount of slip agent in the body member 5a and the cock member 5b, even when the opening / closing operation is repeated many times, the opening / closing required operating force increases excessively. The ease of opening and closing operation was maintained.
When the content of the slip agent was too small, when the opening / closing operation was repeated, the required operating force for opening / closing increased, making it difficult to open / close.
On the other hand, when the content of the slip agent exceeds a certain level, the effect of suppressing the increase in the opening / closing required operating force is saturated, and the slip agent is less affected by the content of the slip agent.

  The present invention can be used as, for example, a faucet for a bag-in-box.

L ₀ axis 1 Bag-in-box (liquid container)
4 mouth part 5 cock device 5a body member 5b cock member 10 stopper part 11 outer side surface 13a communication hole 21 outer cylinder 22 inner cylinder 24 knob

Claims (2)

A cock device for opening and closing the mouth of the liquid container,
A plug part to be attached to the mouth part and an outer cylinder having an axis line along the outer side surface of the mouth plug part are integrally included, and a communication hole is formed through the inner peripheral surface of the outer cylinder from the mouth plug part. A body member formed,
A cock member that integrally includes an inner cylinder that is press-fitted rotatably around the axis within the outer cylinder, and a knob that extends from one end of the inner cylinder so as to intersect the axis; and a cock member that opens and closes the communication hole; ,
The body member and the cock member have a slip agent added to a main component resin, and the slip agent is added to 1 to 3 parts by mass with respect to 100 parts by mass of the main component resin. The cock device is characterized in that 2 to 5 parts by mass of the slip agent is contained in 100 parts by mass of the main component resin in the cock member . The cock device according to claim 1, wherein the slip agent contains erucic acid amide.

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