JP2013241197A - Cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cap having a simple structure, which is capable of maintaining a sealed state inside a container without any manual operation by a user after using a content in the container.SOLUTION: A cap body 4 of a cap 1 includes a discharging passage 24 to be communicated with a container mouth part 3, a base part 21 which is fitted to the inside of the discharging passage 24, and provided with a discharging hole 22, and a stop valve 23 arranged on the base part 21. The stop valve 23 includes a cylindrical part 46 to be fitted to the inside of the discharging passage 24, a plurality of elastic pieces 47 extending radially toward a center from an inner wall surface of the cylindrical part 46 to form a gap 49, and a valve member 48 which is integrally connected to a fore end of each elastic piece 47 to open/close the discharging hole 22. Thus, when the internal pressure into the container 2 is released, each elastic piece 47 of the stop valve 23 is restored, and the valve member 48 closes the discharging hole 22 to maintain the sealed state inside the container 2.

Description

  The present invention relates to a cap attached to a container mouth of a container filled with a relatively high viscosity content or an anaerobic content.

  After the use of the above-mentioned contents, if the sealed state in the container cannot be maintained and air enters the container, the cap is attached to the container mouth portion in order to dry the contents and accelerate its deterioration. Immediately after the body part is squeezed and an internal pressure is applied to the container to pass an appropriate amount of contents, the container is required to be sealed without a manual operation by the user.

  Therefore, in Patent Document 1, a coil device (generally made of metal) and a valve body that opens and closes a liquid outlet hole are provided in a valve device fitted to a container port of a container, and the abdomen of the container is squeezed to , The valve body is moved upward to open the liquid outlet hole, and after use, the valve body is moved downward by the biasing force of the spring to close the liquid outlet hole.

Japanese Utility Model Publication No. 54-136158

  As described above, in the invention of Patent Document 1, the valve body is moved downward by using the urging force of the coil spring, and the discharge port through which the content is discharged without the user's operation can be closed. Although it is hermetically sealed, the valve body must be provided as a separate body, its structure is complicated, and in order to properly apply the urging force of the separate coil spring, the coil spring is provided with the valve body. However, there is a possibility that the working efficiency is lowered and the cost is increased.

  The present invention has been made in view of such points, and an object thereof is to provide a cap having a simple structure and capable of maintaining the inside of a container in a sealed state without being operated by a user's hand after use of the contents. And

As a means for solving the above-mentioned problems, the present invention is characterized in that the invention described in claim 1 is a cap including a cap body that is fitted to a container mouth portion, and the cap body includes the container mouth portion. A discharge passage that communicates with the discharge passage, a base portion that fits into the discharge passage and has a discharge hole, and a check valve that is disposed on the base portion and allows only discharge of the content from the discharge hole; The check valve includes a cylindrical portion fitted in the discharge passage, and a plurality of elastically deformable elastic members extending radially toward the center so as to form a gap from the inner wall surface of the cylindrical portion. It comprises a piece and a valve member which is integrally connected to the tip of each elastic piece and which is downstream of the discharge hole in the discharge direction and opens and closes the discharge hole.
In the invention of claim 1, when the contents are used, if the body portion of the container is squeezed and an internal pressure is applied to the container, the elastic pieces of the check valve are bent by the internal pressure of the container, and the valve member is the base portion. An appropriate amount of content is discharged from the discharge hole to the outside away from the discharge hole. On the other hand, when the internal pressure to the container is released, each elastic piece of the check valve is restored, so that the valve member closes the discharge hole of the base part and keeps the inside of the container in a sealed state, and into the air container Inflow can be prevented.

The invention described in claim 2 is the invention described in claim 1, wherein each elastic piece includes a horizontal elastic piece extending in a direction crossing the discharge passage from an inner wall surface of the cylindrical portion, and a tip of the horizontal elastic piece. And a longitudinal elastic piece connected to the valve member.
In the invention of claim 2, the restoring force (elastic force) of each elastic piece can be easily replaced with the pressing force to the valve seat around the discharge hole of the valve member.

The invention described in claim 3 is the invention described in claim 1 or 2, wherein the elastic piece is provided above each elastic piece, guides the cylindrical portion from the inside, and each elastic piece is discharged when the contents are discharged. It has a guide portion that abuts.
In the invention of claim 3, the cylindrical portion can be supported by the guide portion, and excessive deformation of each elastic piece can be suppressed when the contents are discharged by the internal pressure of the container.

The invention described in claim 4 is the invention described in any one of claims 1 to 3, further comprising a lid body to be crowned by the cap body, the lid body having the discharge passage of the cap body. A closing portion that closes the upper end is formed.
In the invention of claim 4, when the cover is put on the cap body after use, the upper end of the discharge passage of the cap body is closed by the closed portion of the cover, so that foreign matter is not mixed into the discharge passage of the cap body. In addition to preventing and double closing the inside of the container, the sealed state in the container can be reliably maintained.

  According to the cap of the present invention, when the internal pressure to the container is released after the contents are used, each elastic piece of the check valve provided in the cap body is restored. The inside of the container can be maintained in a sealed state.

FIG. 1 is a cross-sectional view showing a cap according to an embodiment of the present invention. 2A and 2B show a disk-shaped base portion employed in the cap, wherein FIG. 2A is a plan view and FIG. 2B is a cross-sectional view. FIG. 3 shows a check valve employed in the cap, wherein (a) is a plan view and (b) is a cross-sectional view. FIG. 4 is a cross-sectional view showing how the contents in the container are discharged to the outside via the check valve of the cap body.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to FIGS.
As shown in FIG. 1, a cap 1 according to an embodiment of the present invention includes a cap body 4 that is fitted to a container mouth 3 of a container 2, and a lid that is coupled to the cap body 4 via a hinge 6. It is composed of a body 5. The lid 5 may not be connected by the hinge 6.
As shown in FIG. 1, the container 2 is a container that is easily deformed such as a tube container, for example, and the inside thereof is filled with a relatively high-viscosity content or anaerobic content. The container 2 is of a type in which the contents are discharged to the outside by applying an internal pressure, for example, by squeezing the trunk. The container mouth portion 3 includes a cylindrical wall portion 10, a horizontal wall portion 11 connected to the upper end of the cylindrical wall portion 10, and a discharge port 12 provided at a substantially radial center of the horizontal wall portion 11. Is done. On the outer peripheral surface of the cylindrical wall portion 10, an annular ridge 13 protruding outward is formed. Further, a plurality of rotation restricting portions 14 extend in the vertical direction on the upper portion of the annular ridge 13 of the cylindrical wall portion 11 of the container mouth portion 3, and a plurality of them are formed at intervals in the circumferential direction.

  The cap body 4 includes a cylindrical body 18 that is suspended from the outer peripheral edge of the disk-shaped top surface 17, an inner side of the cylindrical body 18, and the cylindrical body 18 from the lower surface of the top surface 17. A cylindrical fitting portion 19 suspended concentrically, and a lower cylinder suspended from the lower surface of the top surface portion 17 concentrically with the cylindrical fitting portion 19 inside the cylindrical fitting portion 19. A cylindrical wall portion 35, an upper cylindrical discharge portion 20 that communicates with the lower cylindrical wall portion 35 and extends upward from the upper surface of the top surface portion 17, and a discharge passage 24 inside the lower cylindrical wall portion 35. A disc-like base portion 21 having a discharge hole 22 and a check valve 23 disposed on the disc-like base portion 21 and allowing only discharge of contents from the discharge hole 22. I have.

  The cylindrical body portion 18 is formed to have such a length that the lower end thereof approaches the shoulder portion of the container 2. On the inner peripheral surface of the lower end of the cylindrical fitting portion 19, an annular ridge 30 that protrudes inward is formed. Further, a rotation restricting portion 31 protrudes inwardly above the annular ridge 30 with a gap. A plurality of the rotation restricting portions 31 extend in the vertical direction and are formed at intervals in the circumferential direction. An annular seal portion 32 is provided between the cylindrical fitting portion 19 and the lower cylindrical wall portion 35. The annular seal portion 32 is annularly suspended from the lower surface of the top surface portion 17, and the lower end thereof is in close contact with the upper surface of the horizontal wall portion 11 of the container mouth portion 3.

  Inside the lower cylindrical wall portion 35, a cylindrical guide portion 41 is suspended from the lower surface of the top surface portion 17 so as to be concentric with the lower cylindrical wall portion 35. The axial length of the cylindrical guide portion 41 is much shorter than the axial length of the lower cylindrical wall portion 35. The upper cylindrical discharge section 20 includes a first upper discharge section 36 that extends upward from the top surface of the top surface section 17 in a truncated cone shape, and a second cylinder that extends upward from the upper end of the first upper discharge section 36 in a cylindrical shape. The upper discharge part 37 is comprised. The opening in the first upper discharge part 36 is gradually reduced in diameter upward. The upper outer peripheral surface of the second upper discharge portion 37 is formed with a tapered portion 39 that tapers toward the tip. An annular protrusion 38 is formed on the outer peripheral surface of the second upper discharge part 37 so as to protrude outward at the position of the base part of the taper part 39. On the inner peripheral surface of the lower end of the lower cylindrical wall portion 35, an annular flange portion 40 projects inward. And the inside of the upper cylindrical discharge part 20 and the lower cylindrical wall part 35 becomes the discharge passage 24 of the content from the container opening part 3. FIG.

  As shown in FIG. 1 and FIG. 2, a disc having a discharge hole 22 that is circular in the center in the radial direction and penetrates in the vertical direction on the annular flange 40 of the lower cylindrical wall 35 of the cap body 4. The base 21 is disposed. The disk-shaped base portion 21 is supported by the annular flange portion 40. The outer diameter of the disc-shaped base portion 21 matches the inner diameter of the lower cylindrical wall portion 35.

  As shown in FIGS. 1 and 3, a check valve 23 is disposed on the disc-like base portion 21. The check valve 23 has a cylindrical portion 46 that is in contact with the inner wall surface of the lower cylindrical wall portion 35 of the cap body 4, and toward the center so as to form a gap 49 from the inner wall surface of the cylindrical portion 46. A plurality of elastically deformable elastic pieces 47 extending radially, and downstream of the discharge holes 22 provided in the disk-like base portion 21 integrally connected to the tips of the respective elastic pieces 47, the discharge holes The valve member 48 that opens and closes the valve member 22 and the valve seat 45 that is provided on the upper surface around the discharge hole 22 of the disk-like base portion 21 and that is seated on the valve member 48 and that is recessed in a spherical shape. The cylindrical portion 46, each elastic piece 47, and the valve member 48 are integrally formed of synthetic resin. The outer diameter of the cylindrical portion 46 coincides with the inner diameter of the lower cylindrical wall portion 35. The cylindrical portion 46 is brought into contact with the inner wall surface of the lower cylindrical wall portion 35 on the disk-shaped base portion 21, and the upper end portion of the cylindrical portion 46 is cylindrical with the inner wall surface of the lower cylindrical wall portion 35. It is clamped between the outer wall surface of the guide part 41. A plurality of elastic pieces 47 extend radially from the substantially middle position in the vertical direction of the inner wall surface of the cylindrical portion 46 toward the center. Each elastic piece 47 that supports the valve member 48 is elastically deformable. A gap 49 is provided between the elastic pieces 47. In the present embodiment, eight elastic pieces 47 are formed at equal intervals in the circumferential direction. Each elastic piece 47 bends downward in a substantially vertical direction with respect to the lateral elastic piece 50 from the lateral elastic piece 50 extending in a substantially horizontal direction from approximately the middle in the vertical direction of the inner wall surface of the cylindrical portion 46. Are formed in a substantially L shape in a side view including a longitudinal elastic piece 51 extending in the direction. The lower end of the longitudinal elastic piece 51 of each elastic piece 47 is connected from above to the upper peripheral edge of the disc-shaped valve member 48. The valve member 48 is formed to have a larger diameter than the discharge hole 22 of the disk-shaped base portion 21. The outer peripheral edge of the lower end of the valve member 48 is formed in a spherical shape corresponding to the shape of the valve seat 45 provided on the upper surface around the discharge hole 22 of the disc-like base portion 21. As shown in FIG. 3B, the entire valve member 48 protrudes below the lower end of the cylindrical portion 46 in a state where the valve member 48 is not seated on the valve seat 45 of the disc-like base portion 21. It is preferable from the viewpoint of valve pressure.

  As shown in FIG. 1, the lid 5 includes a disk-shaped top surface portion 53, a cylindrical body portion 54 suspended from the outer periphery of the top surface portion 53, and an inner side of the cylindrical body portion 54. A cylindrical fitting portion 55 provided concentrically with the cylindrical body portion 54 from the top surface portion 53, and disposed closer to the inside than the cylindrical fitting portion 55, the cylindrical fitting portion 55 It is comprised from the cylindrical obstruction | occlusion part 56 hung concentrically. The cylindrical body portion 54 has a longer axial length than the cylindrical fitting portion 55, and the cylindrical fitting portion 55 has a longer axial length than the cylindrical closing portion 56. An annular protrusion 57 projecting inward is formed on the lower inner peripheral surface of the cylindrical fitting part 55. When the outer diameter of the cylindrical blocking portion 56 substantially matches the inner diameter of the second upper discharge portion 37 of the upper cylindrical discharge portion 20 of the cap body 4 and the cap body 4 is covered with the lid 5, The cylindrical blocking portion 56 of the lid 5 is fitted inside the upper end of the second upper discharge portion 37 of the upper cylindrical discharge portion 20 of the cap body 4.

  In assembling the cap 1, first, the check valve 23 is fitted into the discharge passage 24 of the lower cylindrical wall portion 35 provided in the cap body 4. That is, the cylindrical portion 46 is brought into contact with the inner wall surface of the lower cylindrical wall portion 35, and the upper end portion of the cylindrical portion 46 is between the inner wall surface of the lower cylindrical wall portion 35 and the outer wall surface of the cylindrical guide portion 41. To hold. Thereafter, while pressing the lower end of the cylindrical portion 40, the disk-like base portion 21 is pushed in so that it can be disposed on the annular flange portion 40 provided at the lower end of the lower cylindrical wall portion 35 of the cap body 4. Then, the lateral elastic piece 50 of each elastic piece 47 of the check valve 23 extends in a direction crossing the discharge passage 24, and the valve seat 45 is closed so that the valve member 48 closes the discharge hole 22 of the disc-shaped base portion 21. Sit on. As a result, the check valve 23 is disposed on the downstream side in the discharge direction of the discharge hole 22 of the disc-shaped base 21. Further, in the seated state, each elastic piece 47 of the check valve 23 has a slightly bent base elastic piece 50 (ie, a connecting portion with the cylindrical portion 46) as compared with the initial state shown in FIG. Since it extends diagonally upward, the valve member 48 is urged in the direction of seating on the valve seat 45 by the restoring force of each elastic piece 47.

  Next, when the cap body 4 is covered with the lid 5, the hinge 6 is bent and the lid 5 is covered so as to cover the cap body 4 from above. Then, the annular protrusion 57 provided on the cylindrical fitting portion 55 of the lid 5 is engaged with the annular protrusion 38 provided on the second upper discharge portion 37 of the upper cylindrical discharge portion 20 of the cap body 4. At the same time, the cylindrical blocking portion 56 of the lid 5 is tightly fitted inside the upper end of the second upper discharge portion 37 of the upper cylindrical discharge portion 20 of the cap body 4.

  Next, when the cap body 4 is attached to the container mouth portion 3, the annular protrusion 30 provided on the cylindrical fitting portion 19 of the cap body 4 is the outer peripheral surface of the cylindrical wall portion 10 of the container mouth portion 3. It engages so that it may get over the cyclic | annular protrusion 13 provided in this. As a result, the rotation restricting portions 31 and 31 on the cap body 4 side are inserted between the rotation restricting portions 14 and 14 on the container mouth portion 3 side, and relative rotation is restricted. Further, the lower cylindrical wall portion 35 of the cap body 4 is tightly inserted into the discharge port 12 of the container mouth portion 3, and the lower end of the annular seal portion 32 provided in the cap body 4 is the horizontal of the container mouth portion 3. It is in close contact with the upper surface of the wall 11. In this way, the attachment of the cap 1 to the container mouth 3 is completed.

Then, when using the contents from the state of FIG. 1, as shown in FIG. 4, first, the lid 5 is opened to expose the upper cylindrical discharge part 20 of the cap body 4 to the outside. Thereafter, the body of the container 2 is squeezed to apply internal pressure to the container 2. Then, due to the internal pressure of the container 2, each elastic piece 47 of the check valve 23 rotates until its base portion is bent more than the state of FIG. 1 and the lateral elastic piece 50 contacts the lower end of the cylindrical guide portion 41. By moving, the valve member 48 is separated from the valve seat 45 around the discharge hole 22 of the disc-like base portion 21. As a result, the discharge hole 22 of the disk-shaped base portion 21 is opened, and an appropriate amount of contents are passed from the container mouth portion 3 to the gap 49 between the discharge hole 22 of the disk-shaped base portion 21 and each elastic piece 47 (see FIG. 3 (a)) and discharged to the outside.
On the other hand, when the internal pressure to the container 2 is released, each elastic piece 47 of the check valve 23 is restored, so that the valve member 48 is seated on the valve seat 45 around the discharge hole 22 of the disc-shaped base portion 21. Thus, the discharge hole 22 is closed. At this time, the valve member 48 of the check valve 23 is urged in a direction to be seated on the valve seat 45 around the discharge hole 22 by the restoring force of each elastic piece 47. As a result, immediately after use, the inside of the container 2 can be hermetically sealed without being manually operated by the user, thereby preventing air from flowing into the container 2.

  Thereafter, when the hinge 6 is bent and the lid 5 is covered so as to cover the cap body 4 from above, the annular protrusion 57 provided on the cylindrical fitting portion 55 of the lid 5 is formed in the upper cylindrical shape of the cap body 4. It engages so that it may get over the annular protrusion 38 provided in the 2nd upper side discharge part 37 of the discharge part 20, and the cylindrical obstruction | occlusion part 56 of the cover body 5 is the 2nd upper side of the upper cylindrical discharge part 20 of the cap main body 4. The discharge portion 37 is tightly fitted inside the upper end. As a result, foreign substances are prevented from entering the discharge passage 24 of the cap body 5 and the inside of the container 2 is closed twice.

  As described above, in the cap 1 according to the embodiment of the present invention, in particular, the cap body 4 includes the discharge passage 24 communicating with the container mouth portion 3 and the discharge passage 24 of the lower cylindrical wall portion 35. A disc-like base portion 21 having a discharge hole 22 and a check valve 23 disposed on the disc-like base portion 21 and allowing only discharge of contents from the discharge hole 22. The check valve 23 includes a cylindrical portion 46 fitted into the discharge passage 24 of the lower cylindrical wall portion 35, and toward the center so as to form a gap 49 from the inner wall surface of the cylindrical portion 46. A plurality of elastically deformable elastic pieces 47 that extend radially, and a valve member 48 that is integrally connected to the tip of each elastic piece 47 and arranged downstream of the discharge hole 22 in the discharge direction and opens and closes the discharge hole 22 Composed. Accordingly, when the contents are used, if the body portion of the container 2 is squeezed and an internal pressure is applied to the container 2, the elastic pieces 47 of the check valve 23 are bent from the base portion and the valve member 48 due to the internal pressure of the container 2. Is separated from the discharge hole 22 of the disk-shaped base portion 21 and an appropriate amount of content is discharged from the discharge hole 22 to the outside. On the other hand, when the internal pressure to the container 2 is released, each elastic piece 47 of the check valve 23 is restored, so that the valve member 48 closes the discharge hole 22 of the disc-shaped base portion 21 and seals the inside of the container 2. Thus, the inflow of air into the container 2 can be prevented.

  Further, the cap 1 according to the embodiment of the present invention includes a lid body 5 that is crowned by the cap body 4, and the lid body 5 includes a second upper discharge of the upper cylindrical discharge portion 20 of the cap body 4. Since the cylindrical blocking portion 56 that fits inside the upper end of the portion 37 is formed, the cap body 4 is covered with the lid body 5 after use, thereby preventing foreign matter from entering the discharge passage 24 of the cap body 5. At the same time, since the inside of the container 2 is closed twice, the sealed state in the container 2 can be ensured.

  DESCRIPTION OF SYMBOLS 1 Cap, 2 Container, 3 Container mouth part, 4 Cap main body, 5 Lid body, 6 Hinge, 20 Upper cylindrical discharge part, 21 Disc-shaped base part, 22 Discharge hole, 23 Check valve, 24 Discharge passage, 35 Lower cylindrical wall portion, 41 cylindrical guide portion, 45 valve seat, 46 cylindrical portion, 47 elastic piece, 48 valve member, 49 gap 50 lateral elastic piece, 51 vertical elastic piece, 56 cylindrical occlusion portion

Claims (4)

A cap having a cap body fitted to the container mouth,
The cap body includes a discharge passage communicating with the container mouth portion,
A base portion fitted into the discharge passage and having a discharge hole;
A check valve disposed on the base portion and allowing only discharge of contents from the discharge hole,
The check valve includes a cylindrical portion that is fitted into the discharge passage, a plurality of elastic pieces that are radially deformable and extend radially toward the center so as to form a gap from the inner wall surface of the cylindrical portion, A cap characterized by comprising a valve member that is integrally connected to the tip of each elastic piece and that is downstream of the discharge hole in the discharge direction and opens and closes the discharge hole.   Each elastic piece includes a horizontal elastic piece extending in a direction crossing the discharge passage from the inner wall surface of the cylindrical portion, and a vertical elastic piece connected to the valve member by bending downward and extending from the tip of the horizontal elastic piece. The cap according to claim 1, comprising:   3. The cap according to claim 1, further comprising a guide portion that is provided above each elastic piece, guides the cylindrical portion from the inside, and contacts the elastic pieces when the contents are discharged. .   4. The lid according to claim 1, further comprising a lid that is crowned by the cap body, wherein the lid is formed with a closing portion that closes an upper end of the discharge passage of the cap body. Cap as described in.

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