JP3115957U - Cap for liquid container - Google Patents

Abstract

An object of the present invention is to provide a cap for a liquid storage bin capable of more reliably attaching and detaching an inner cylinder portion and an inner lid of a cap used for a liquid storage bin.
The cap includes an outer cylindrical portion, a bottom portion having a central hole, an inner cylindrical portion, a cap main body having a first locking portion, and the first locking portion. The cap body 2 is composed of a second locking portion 311 and an inner lid 3 having a fourth locking portion 312 that locks with the third locking portion 623 of the fixing pin 62, and the cap body 2 is equidistant on a coaxial circumference. It is characterized by being injection-molded with a mold having a plurality of injection ports.
The cap body 2 has an inner cylindrical portion having a shaft hole coaxial with the center hole thereof, and is molded with an axial object, and distortions such as resin distribution that occur at the time of molding are also axial objects. The inner cylindrical portion 23 of the cap body 2 attached in the axial direction by the fixing pin 62 exhibits the same deformation and extension with respect to the fixing pin 62, and the gallon bin 5 supplies drinking water more reliably by the cap 1. The container 6 can be attached and detached.
[Selection] Figure 5

Description

  The present invention relates to a cap of a liquid storage bottle for storing purified water for beverages.

  In offices, natural water and mineral water are stored in 10 to 20 liter liquid storage bottles called gallon bins, and connected to drinking water supply units having heating or cooling functions for drinking water supply. Have been supplied. This gallon bin is used by being attached in an inverted position to an adapter for mounting a drinking water supply device. Japanese Patent Publication No. 6-62195 describes a cap that covers an opening of a liquid storage bottle so that liquid contained in the liquid storage bottle does not spill when mounted in an inverted posture. When the liquid storage bottle is inverted and attached to the drinking water supplier, a part of the cap is broken by the fixing pin of the drinking water supplier so that the drinking water in the liquid storage bottle flows into the drinking water supplier. It has become.

  Because the cap is broken in this gallon bin, the liquid bottle with reduced drinking water cannot be changed to a new liquid bottle or another liquid bottle containing different drinking water. It was necessary to use all the drinking water inside.

  A cap having an inner lid is known so that the gallon bin can be replaced even when drinking water remains in the gallon bin.

The cap is formed integrally with an outer cylindrical portion that is inserted into the outer peripheral surface of the nipple portion of the liquid storage bottle having a nipple portion that protrudes toward one end and has an opening at the tip, and one end of the outer cylindrical portion. A circular bottom portion having a central hole formed therein, an inner cylindrical portion integrally formed with the bottom portion and extending inward from the bottom portion defining the central hole and coaxially with the outer cylindrical portion, and the inner cylindrical portion A cap body made of a soft resin having a first locking portion formed on
The cylindrical shaft part inserted into the shaft hole of the inner cylinder part from the opening end of the inner cylinder part inside the outer cylinder part, and the one end side opening part of the shaft part are closed and the centrifugal part is centrifuged. Flange portion that protrudes to the side and covers the front end surface of the inner cylinder portion, a second locking portion that locks with the first locking portion, and a third locking of a fixing pin that is mounted from the opening end of the shaft portion When the fixing pin that is locked to the portion is mounted, the first locking portion and the second locking portion are locked with a weak mounting force that maintains the locking between the first locking portion and the second locking portion. A fourth locking portion from which the fixing pin is detached with a force stronger than the force required for locking the locking portion, and an inner lid made of a soft resin that is inserted into and locked to the inner cylinder portion,
It is composed of

  When attaching the gallon bin with this cap to the drinking water supply, the gallon bin is attached so that the center provided at the bottom of the cap body is attached to the fixing pin fixed upward at the center of the water receiving port of the drinking water supply Lower down and attach to the drinking water supply. As the cap body is attached to the fixing pin, the fixing pin enters the inner cylinder portion of the cap body and locks the third locking portion of the fixing pin and the fourth locking portion of the inner cylinder portion. Further, the inner lid is pushed up by the tip of the fixing pin to release the engagement between the first locking portion of the inner cylinder portion and the second locking portion of the inner lid, and the inner lid is detached from the inner cylinder portion of the cap body. At this time, the distal end portion of the fixing pin is inserted through the inner cylindrical portion of the cap. The inner lid detached from the inner cylinder portion is held in a state of being locked to the tip of the fixing pin by the locking of the third locking portion and the fourth locking portion.

  A fixed pin is inserted into the opening of the gallon bin that is inverted and held in the drinking water supply device, and the drinking water in the gallon bin is supplied to the drinking water supply device through a shaft hole provided in the fixed pin. When sufficient drinking water is supplied to the drinking water supply device, the drinking water level rises to the receiving port of the drinking water supply device, and the opening of the gallon bin becomes below the water surface. Drinking water supply stops.

  In order to remove the gallon bin from the drinking water supplier, the gallon bin is lifted and the opening of the gallon bin is moved above the fixing pin. In this movement, the fixing pin relatively moves downward from the inner cylinder portion. Since the inner lid and the fixing pin are firmly locked by the locking of the third locking portion and the fourth locking portion, the inner lid locked at the tip of the fixing pin is the inner cylinder portion of the cap body. Pressed against the upper end, the first locking portion and the second locking portion of the inner lid and the inner cylinder portion are locked, and the inner lid covers the tip of the inner cylinder portion. When the gallon bin is further lifted upward, the locking of the third locking portion and the fourth locking portion is released, and the inner lid is detached from the fixing pin. As a result, the gallon bin is mechanically separated from the drinking water supplier. Since the inner lid is locked to the cap body of the gallon bin, the internal drinking water does not flow out of the opening from the gallon bin.

This conventional cap logically allows the gallon bin to be repeatedly attached to and detached from the drinking water supply. However, in the actual case, when the gallon bin is attached to the drinking water supply device, the inner lid is not locked to the tip of the fixing pin and is detached from the fixing pin, or when the gallon bin is removed from the drinking water supply device, Is not attached to the inner cylinder portion of the cap body, and the inner lid is detached from the fixing pin.
Japanese Examined Patent Publication No. 6-62195

  SUMMARY OF THE INVENTION An object of the present invention is to provide a cap for a liquid storage bin in which the inner cylindrical portion of the cap used for the liquid storage bin and the inner lid can be attached and detached more reliably.

  A conventional cap for a liquid storage bottle is formed by injection-molding polyethylene resin, which is a soft resin, with a mold having one injection port that is offset from the axis of the cap. Since the resin is soft and the molten resin is injected into the cavity of the mold from the injection port that is offset from the axis, internal distortion such as resin distribution of the obtained cap is not targeted for the axis but is biased to one side. For this reason, the shape of the cap obtained is also different from the intended one. Further, the mechanical properties such as the extension of the cap and the elastic modulus due to the molecular arrangement differ depending on the part. In particular, the deviation of the inner cylinder portion that is near the axis of the cap and is attached to and detached from the inner lid greatly affects the attachment and detachment of the inner lid.

  Based on this knowledge, the inventor believes that by obtaining a cap closer to the object of the axis, he can obtain a cap for the liquid storage bottle that allows the inner lid to be attached and detached more reliably. It is a thing.

In other words, the cap of the liquid storage bottle of the present invention includes an outer cylinder portion and an outer cylinder that are inserted into the outer peripheral surface of the nipple portion of the liquid storage bottle having an opening at the tip and protruding at one end. A circular bottom having a central hole integrally formed on one end side of the part, and a circle formed integrally with the bottom and extending coaxially with the outer cylinder part inside a circumferential part defining the central hole A cap body made of a soft resin having an inner tube portion and a first locking portion formed on the inner tube portion, and an opening end of the inner tube portion located inside the outer tube portion. A cylindrical shaft portion that is inserted into the shaft hole, a flange portion that closes an opening on one end side of the shaft portion, protrudes to the centrifugal side from the shaft portion, covers the distal end surface of the inner cylinder portion, and the first engagement A second locking portion that locks with the locking portion, and a fixing pin that locks with the third locking portion of the fixing pin that is mounted from the opening end of the shaft portion. In this case, the force required to lock the first locking portion and the second locking portion is locked with a weak mounting force that maintains the locking between the first locking portion and the second locking portion. A fourth retaining portion to which the fixing pin is attached and detached with a stronger force, and a cap of a liquid storage bottle comprising an inner lid made of a soft resin that is inserted and locked to the inner cylinder portion,
The cap body is a cap for a liquid storage bottle, wherein the cap body is injection-molded with a molding die having a plurality of injection holes equidistant on a circumference coaxial with the central hole of the bottom portion. Features.

  The cap of the liquid storage bottle of the present invention is injection-molded with a molding die having a plurality of injection ports equidistant on the circumference of the cap body coaxial with the central hole at the bottom. For this reason, the inner cylinder portion having an axial hole coaxial with the central hole is molded as an axial object, and more accurate molding is possible as compared with the case where the injection port is biased to one of the central holes. . Further, since distortion such as resin distribution that occurs at the time of molding is also an axis object, the mechanical properties of the cap portion are also an axis object. For this reason, the inner cylinder part of the cap mounted in the axial direction by the fixing pin shows the same deformation and extension as the fixing pin, and the cap of the liquid storage bottle of the present invention can be more reliably attached to and detached from the drinking water supply device. Become.

  The injection port of the mold of the present invention can be three. That is, the cap is formed by a forming die having three injection holes provided concentrically with each other at intervals of 120 degrees. The resulting cap will be composed of three parts of the axis object at 120 degree intervals.

  Note that the number of inlets is not limited to three. Two or four or more may be sufficient. However, because the cap is relatively small, three inlets are considered more reasonable.

  Further, the fourth locking portion of the inner lid of the cap of the present invention is formed by a ring-shaped ridge projecting axially from the inner peripheral surface of the opening end of the shaft portion, and is formed by a slit extending in the normal direction in the circumferential direction. It is preferable to be divided.

  The ring-shaped ridge protruding in the axial direction can be firmly locked with the third locking portion of the fixing pin. However, when the third locking portion of the fixing pin gets over and engages with the fourth locking portion of the shaft portion of the inner lid, there is a great resistance. A slit extending in the normal direction that divides the ring-shaped protrusion makes this large resistance smaller. For this reason, the third locking portion of the fixing pin is fixed to the shaft portion of the inner lid by a force weaker than the locking force between the first locking portion and the second locking portion at which the cap body and the inner lid are respectively locked. It is possible to engage over the four locking portions.

  Further, the flange portion of the inner lid may have a fin that covers the outer peripheral surface of the tip portion of the inner cylinder portion of the cap body to which the inner lid is attached. The fin has a ring-shaped ring groove having a V-shaped cross section that is sectioned by the outer peripheral surface of the base portion of the shaft portion of the inner lid, the inner surface of the flange portion connected to the shaft portion, and the inner peripheral surface of the fin. It is also possible to attach the tip portion and seal the cap body and the inner lid.

  FIG. 1 is a sectional view of a cap of a liquid storage bottle according to an embodiment of the present invention, and FIG. 2 is a plan view thereof. This cap is used as a cap for gallon bin 5 made of hard vinyl chloride containing drinking water whose cross section is shown in FIG.

  As shown in FIG. 3, the gallon bin 5 has an opening 50 at the tip and a nipple portion 51 that protrudes to one end. A ring-shaped ridge 52 is formed around the outer periphery of the outer peripheral surface at a predetermined interval from the tip of the nipple portion 51.

  The cap 1 of the present invention is composed of a cap body 2 and an inner lid 3 as shown in FIG. Both the cap body 2 and the inner lid 3 are made of soft polyethylene.

  As shown in FIGS. 1 and 2, the cap body 2 includes an outer cylindrical portion 21 that is inserted into the nipple portion 51 of the gallon bin 5, and a central hole 220 that is integrally formed on one end side of the outer cylindrical portion 21. And the inner cylinder part 23 which is formed integrally with the bottom part 22 and which extends inside the circumferential part 221 which defines the central hole 220 and extends coaxially with the outer cylinder part 21.

  A first locking portion 231 formed of a ring-shaped step portion is provided at the central portion in the axial direction on the inner peripheral surface side of the inner cylinder portion 23. The first locking portion 231 is formed as a step between a root portion 232 having a slightly larger inner peripheral diameter and a tip portion 233 having an inner peripheral diameter slightly smaller than the root portion 232.

  As shown in FIG. 2 which is a plan view of the cap body 2, three inlet traces 222, 223 provided at equal intervals on a circumference coaxial with the central hole 220 of the bottom portion 22, and It has 224. That is, the cap body 2 is injection-molded by a molding die (not shown) having an injection port equal to the positions of these three injection hole marks 222, 223 and 224. That is, the molten resin flows into the cavity of the molding die from the three inlets that are axially connected to each other, is cooled and solidified by the die, and the cap body 2 having the shape of the axial target is molded. is there.

  Since each partial part of the cap main body 2 and the three injection ports are axial objects, internal distortion based on the arrangement of resin molecules resulting from the flow of the resin accompanying the molding of the molten resin is also an axial object. For this reason, the outer cylinder part 21 and the inner cylinder part 23 of the cap main body 2 are also mutually targeted, and the coaxiality of the outer cylinder part 21 and the inner cylinder part 23 is highly consistent.

  The inner lid 3 includes a cylindrical shaft portion 31, a flange portion 32 that closes one end of the shaft portion 31, and a ring-shaped fin 33 that slightly extends coaxially with the shaft portion 31 from the circular end of the flange portion 32. Become. A second locking portion 311 is formed on the outer peripheral side of the distal end portion of the shaft portion 31 of the inner lid 3 and is formed of an outer ridge having a step shape on the rear end side in a ring shape that goes around the outer peripheral portion. Further, a fourth locking portion 312 comprising an inner ridge formed of four ridges having a step on the rear end side that goes around the inner peripheral portion on the inner peripheral side of the tip portion of the shaft portion 31. Is formed. Adjacent ridges are separated by slits extending in the normal direction. Since both the second locking portion 311 and the fourth locking portion 312 have a cross-sectional key shape having a step on the rear end side, both the second locking portion 311 and the fourth locking portion 312 are from the front end side. When it is pressed axially toward the rear end side, it falls to the rear end side with a weak force. However, when pressed from the rear end side to the front end side, the key portion acts like a claw and resists with a strong force, and a strong force is required to tilt the rear end side to the front end side. In addition, since the 4th latching | locking part 312 is divided into four by the slit, the 4th latching | locking part 312 is falling further easily with a weak force from the rear end side to the front end side.

  A ring-shaped ring groove 331 having a V-shaped cross section is formed which is defined by the inner peripheral surface of the fin 33 of the inner lid 3, the inner side surface of the flange portion 32 connected thereto, and the outer peripheral surface of the shaft portion 31 connected thereto. Is done.

  The cap 1 of this embodiment has the above-described configuration. The cap 1 is used in a state where the inner lid 3 is attached to the distal end portion of the inner cylinder portion 23 of the cap body 2. That is, the shaft portion 31 of the inner lid 3 is pushed into the shaft hole of the inner cylinder portion 23 of the cap body 2. The second locking portion 311 made of the outer rim of the inner lid 3 is squeezed in the axial direction and moves in the axial direction by sliding on the inner peripheral surface of the distal end portion 233 of the inner cylinder portion 23 of the cap body 2. The first engaging portion 231 formed of a step portion is passed and reaches a root portion 232 having a slightly wider inner peripheral diameter. Here, the second locking portion 311 formed of the outer peripheral ridge that has been crushed opens in the outer peripheral direction and contacts the inner peripheral surface of the root portion 232. As a result, the first locking portion 231 of the cap body 2 and the second locking portion 311 of the inner lid 3 are locked.

  Further, the inner lid 3 is pushed in, the tip of the inner cylinder portion 23 of the cap body 2 is pushed into the ring groove 331 of the inner lid 3, and the inner lid 3 liquid-tightly seals the inner cylinder portion 23 of the cap body 2. It is fixed to the inner cylinder part.

  As shown in FIG. 3, the cap 1 to which the inner lid 3 is fixed is mounted and fixed so as to fit the nipple portion 51 of the gallon bin 5 for drinking water. At the time of mounting, the outer cylinder portion 21 of the cap body 2 covers the nipple portion 51 of the gallon bin 5 in a state where the diameter is elastically expanded, and the tip of the outer cylinder portion 21 is in contact with the ring-shaped protrusion 52 of the nipple portion 51. It is installed with. As a result, the gallon bin 5 is reliably covered with the cap 1.

  The gallon bin 5 in which the drinking water is stored and the cap 1 is fixed is placed on the saucer 61 on the upper end side of the drinking water supply device 6 shown in FIG. A fixing pin 62 is fixed at the center of the tray 61 with the tip end facing up. An air vent hole 612 is provided in the bottom 611 of the tray 61. A lower part of the tray 61 is a water storage space 60 of the drinking water supplier 6.

  The fixing pin 62 has a semi-spherical head 621 at the tip, and a neck 622 having a smaller outer diameter than the lower end of the head 621 extends integrally and is fixed to the center of the tray 61. The neck portion 622 is formed with a passage 623 for passing drinking water having one end opened on the outer peripheral surface of the upper portion in the axial direction and the other end opened on the lower end surface of the shaft portion.

  A third locking portion 623 having a ring-shaped step is formed at the boundary between the head portion 621 and the neck portion 622 of the fixing pin 62.

  FIG. 4 shows the relative position immediately before the gallon bin 5 is placed on the drinking water supply device 6. The shaft portion 31 of the inner lid 3 of the cap 1 fixed to the gallon bin 5 and the tray of the drinking water supply device 6. The fixing pin 62 of the part 61 is in a state close to the same axis. In this state, the gallon bin 5 is lowered. The inner peripheral ridge 312 at the tip of the shaft portion 31 of the inner lid 2 of the cap 1 abuts against the head 621 of the fixing pin 62 and pushes the inner lid 3 upward with respect to the cap body 2. By the relative movement of the inner lid 3 and the cap main body 2 in the axial direction, a first engagement consisting of a second locking portion 311 formed of a protrusion on the outer peripheral side of the inner lid 3 and a stepped portion of the inner cylindrical portion 23 of the cap main body 2. The stop portion 231 comes into contact with each other, and both are completely locked. As a result, the relative movement between the inner lid 2 and the cap body 1 stops.

  When the gallon bin 5 is further lowered, the locking between the second locking portion 311 formed by the outer peripheral protrusion of the inner lid 3 and the first locking portion 231 formed by the step of the inner cylinder portion 23 of the cap body 2 is fixed. The third locking portion 621 formed of the stepped portion of the pin 62 pushes open the fourth locking portion 312 formed of the inner circumferential protrusion of the shaft portion 31, and the third locking portion 621 and the fourth locking portion 312 are engaged. Since it is stronger than the force required to stop, the engagement between the second locking portion 311 formed by the outer peripheral protrusion of the inner lid 3 and the first locking portion 231 formed by the step portion of the inner cylinder portion 23 of the cap body 2. The head 62 having the third locking portion 621 formed of a stepped portion of the fixing pin 62 pushes and opens the fourth locking portion 312 formed of the inner peripheral side protrusion of the shaft portion 31. The head 621 is relatively above the shaft hole of the shaft portion 31 in a state where the portion 621 and the fourth locking portion 312 reach the locked state and keep the locked state. Moving.

  The head 621 further moves the shaft hole of the shaft portion 31 relatively upward, and the head 621 hits the flange portion 32 of the inner lid 3. In this state, since the gallon bin 5 is further lowered, the force that pushes the inner lid 3 relative to the cap body 2 relative to the cap body 2 by the head 621 of the fixing pin 62 is the second engagement formed by the outer circumferential protrusion of the inner lid 3. The second locking portion 311 and the cap body made of the outer rim of the inner lid 3 exceed the locking force between the locking portion 311 and the first locking portion 231 formed by the stepped portion of the inner cylinder portion 23 of the cap body 2. The engagement with the first engagement portion 231 formed by the stepped portion of the inner cylinder portion 23 is broken. As a result, the inner lid 3 is separated from the cap body 2 in a state of covering the head 621 of the fixing pin 62. The gallon bin 5 is placed on the bottom surface of the tray 61 of the drinking water supplier 6. This state is shown in FIG.

  In this state, since the fixing pin 62 is inserted into the shaft hole of the inner cylindrical portion 23 of the cap body 2, the drinking water in the gallon bin 5 passes through the passage 623 of the fixing pin 62 and the water storage space of the drinking water supplier 6. To 60. When the water storage space 60 is filled with drinking water, the drinking water rises up to the tray 61 and closes the central port 220 of the cap body 2, the supply of air sent into the gallon bin 5 is shut off, and the drinking water supply from the gallon bin 5. The supply of drinking water sent to the vessel 6 is stopped.

  In this state, drinking water is used from a stopper (not shown) below the drinking water supply device 6, the water surface of the tray 61 descends by the amount used, and air is discharged from the central port 220 of the cap body 2 to the gallon bottle. 5, and conversely, drinking water is supplied from the gallon bin 5 to the drinking water supplier, the water surface of the tray 61 rises, the central port 220 is closed with water, the supply of air is shut off, and again from the gallon bin 5. Drinking water supplied to the drinking water supplier stops. In this way, the drinking water in the gallon bin 5 is used.

  Even when the drinking water in the gallon bin 5 remains, when changing to a different drinking water, the gallon bin 5 may be replaced. At this time, the opening of the gallon bin 5 is moved upward from the fixing pin 62.

  In this movement, the fixing pin 62 moves relatively downward from the inner cylinder portion 23. Since the inner lid 3 and the fixing pin 62 are firmly locked by the locking of the third locking portion 623 and the fourth locking portion 312, the inner lid 3 fitted on the head 621 of the fixing pin 62. Is pressed against the upper end of the inner cylinder portion 23 of the cap body 2 so that the first locking portion 231 and the second locking portion 311 of the inner lid 3 and the inner cylinder portion 23 are locked and the inner cylinder portion 23 is The inner lid 3 covers the tip. When the gallon bin 5 is further lifted upward, the locking of the third locking portion 623 and the fourth locking portion 312 is released, and the inner lid 3 is detached from the fixing pin 62. As a result, the gallon bin 5 is mechanically separated from the drinking water supplier 6. Since the inner lid 3 is locked to the cap body 2 of the gallon bin 5, the internal drinking water does not flow out of the opening 50 from the gallon bin 5.

  The cap 1 of this embodiment has a cap body 2 having three inlet holes 222, 223 and 224 provided at equal intervals on a circumference coaxial with the central hole 220 of the bottom portion 22. The cap body 2 is injection-molded by a molding die (not shown) having an inlet that is equal to the positions of these three inlet holes 222, 223, and 224. Since each partial part of the cap main body 2 and the three injection ports are axial objects, internal distortion based on the arrangement of resin molecules resulting from the flow of the resin accompanying the molding of the molten resin is also an axial object. For this reason, the outer cylinder part 21 and the inner cylinder part 23 of the cap main body 2 are also mutually targeted, and the coaxiality of the outer cylinder part 21 and the inner cylinder part 23 is highly consistent.

  Further, the fourth locking portion 312 of the inner lid 3 of the cap 1 according to the present embodiment has four isolated ridges that circulate around the inner circumferential portion on the inner circumferential side of the distal end portion of the shaft portion 31 of the inner lid 3. It is composed of That is, the inner ridges constituting the fourth locking portion 312 are separated by slits extending in the normal direction. Therefore, when the head portion 621 of the fixing pin 62 enters the shaft portion 31 of the inner lid 3 having the fourth locking portion 312, the head portion 621 of the fixing pin 62 enters the shaft portion 31 of the inner lid 3 with a weak force. The third locking portion 623 and the fourth locking portion 312 can be locked with a weak force. Conversely, a strong force is required when releasing the locking between the third locking portion 623 and the fourth locking portion 312.

  For this reason, when the gallon bin 5 is attached to the drinking water supplier 6, the head portion 321 of the fixing pin 62 easily enters the shaft portion 31 of the inner lid 3, and the third locking portion 623 and the fourth locking portion 312 are provided. Prior to locking, the possibility that the locking of the first locking portion 231 of the cap body 2 and the second locking portion 311 of the inner lid 3 is released is reduced. For this reason, when the gallon bin 5 is attached to the drinking water supplier 6, the possibility that the inner lid 3 is detached from the cap body 2 without being locked by the fixing pin 62 is low.

  Also, when the gallon bin 5 is removed from the drinking water supply device 6, after the inner lid 3 is fixed to the cap body, that is, after the first locking portion 231 and the second locking portion 311 are locked, The fixing pin 62 is separated from the lid 3. For this reason, even when the gallon bin 5 is removed from the drinking water supply device 6, the inner lid 3 is not fixed to the cap body, and the possibility that the inner lid 3 is separated from the fixed stool 62 is low.

  In addition, the cap of the present embodiment and the conventional cap which has one injection port at the time of injection molding manufactured by the applicant of the present application and does not have a slit in the protrusion on the inner peripheral side of the fourth locking portion. The rate at which the inner lid comes off without being attached to the fixing pin and the cap deformable body when attaching and detaching to the drinking water feeder was tested.

  When the gallon bin was inverted and attached to the drinking water supply device, the ratio of products drifting in the gallon bin's drinking water without being locked to the head of the fixing pin was 35 out of 100 in the conventional product. On the other hand, in the product of this example, only 2 out of 100 products were obtained.

  In addition, when the gallon bin is lifted and removed from the drinking water supply device, the ratio of products that floated in the drinking water of the gallon bin without being fixed to the cap body was 12 out of 100 in the conventional product. On the other hand, in the product of this example, all 100 products were fixed to the cap body, and 0 was not fixed.

  As described above, it was confirmed that the cap of the present invention was much better than the conventional cap.

It is a longitudinal cross-sectional view of the cap of a present Example. It is a top view of the cap main body of the cap of a present Example. It is a longitudinal cross-sectional view of the state which mounted | wore the gallon bin with the cap of a present Example. It is a longitudinal cross-sectional view which shows the state immediately before mounting | wearing the drinking water supply device with the gallon bin which mounted | wore with the cap of a present Example. It is a longitudinal cross-sectional view which shows the state which mounted | wore the drinking water supply device with the gallon bin equipped with the cap of a present Example.

Explanation of symbols

1: cap, 2: cap body, 3: inner lid, 5: gallon bottle, 6: drinking water supply device 21: outer cylinder part, 22: bottom part, 23: inner cylinder part, 222, 223, 224: injection hole trace,
231: first locking portion, 31: shaft portion, 32: flange portion, 33: fin,
311: 2nd latching | locking part, 312: 4th latching | locking part, 50; Opening part, 51: Nipple part 61: Saucepan part, 62: Fixing pin, 623: 3rd latching part

Claims (4)

An outer cylindrical portion that is inserted into the outer peripheral surface of the nipple portion of the liquid storage bottle having a nipple portion that protrudes toward one end and has an opening at the tip, and a central hole integrally formed on one end side of the outer cylindrical portion A circular bottom having an inner cylindrical portion, an inner cylindrical portion that is integrally formed with the bottom portion and extends coaxially with the outer cylindrical portion, and is formed on the inner cylindrical portion. A cap body made of a soft resin having a first locking portion;
The cylindrical shaft portion that is inserted into the shaft hole of the inner cylinder portion from the opening end of the inner cylinder portion inside the outer cylinder portion, and the one end side opening portion of the shaft portion are closed and centrifuged from the shaft portion. A flange portion that protrudes to the side and covers the tip surface of the inner cylinder portion, a second locking portion that locks with the first locking portion, and a third locking of a fixing pin that is mounted from the open end of the shaft portion When the fixing pin that is locked to the portion is mounted, the first locking portion and the second locking portion are locked with a weak mounting force that maintains the locking between the first locking portion and the second locking portion. A fourth locking portion to which the fixing pin is detached with a force stronger than the force required for locking the locking portion, and an inner lid made of a soft resin that is inserted and locked to the inner cylinder portion,
A cap for a liquid storage bottle comprising:
The cap of the liquid storage bottle is characterized in that the cap body is injection-molded with a molding die having a plurality of injection ports equidistant on a circumference coaxial with the central hole of the bottom.   The cap of the liquid storage bottle according to claim 1, wherein the number of the injection ports is three.   The said 4th latching | locking part is divided | segmented in the circumferential direction by the slit extended in the normal line direction formed by the ring-shaped protrusion which protruded in the axial center side from the inner peripheral surface of the opening end of the said shaft part. The cap of the liquid storage bottle described in 1.   The cap of the liquid storage bottle according to claim 1, wherein the flange portion of the inner lid has a fin covering an outer peripheral surface of a tip end of the inner cylinder portion of the cap body.

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