JP6008719B2 - Screw cap - Google Patents

Description

  The present invention relates to a screw cap composed of a cap main body and an upper lid attached to a mouth portion of a container main body, and in particular, in a nozzle type in which a small-diameter spout is formed in the cap main body, the sealing property between the spout and the sealing plug The present invention relates to a screw cap that is improved.

As a cap used for viscous liquid seasoning containers such as dressings, since the liquid drainage is relatively good when liquid is poured out, a small diameter spout is formed in the cap body attached to the mouth of the container body. A nozzle-type cap having a protruding tube portion has been conventionally used.
In such nozzle-type caps, it is common to seal the spout with a sealing plug suspended on the back of the upper lid. However, since the dispensing cylinder and the sealing plug have a small diameter, molding errors and after molding There is a problem that the sealing performance is inferior because it is easily affected by deformation and the strength is small.

For this reason, in liquid seasoning containers, etc., in which the content liquid is often heated and filled for sterilization, there is a risk that shower water may enter the container due to negative pressure inside the container when cooled with shower water after heating and filling. It was.
In addition, liquid leakage may occur when the container falls or falls and receives an impact.
In order to improve such sealing performance, in addition to the plug body 23 that seals the pouring hole 12 of the pouring tube 11, like the cap of the liquid pouring container described in Patent Document 1 below, the pouring tube 11 2. Description of the Related Art A cap having a sealing ring 24 that also seals the outer periphery of the seal and having a double seal is conventionally known.

JP 2002-205755 A

However, even the cap described in Patent Document 1 does not improve molding errors, deformation after molding, strength, etc., so the sealing performance is not drastically improved, and the cap Ba is greatly damaged by impact. There was a risk of liquid leakage when force was applied.
Such a sealing problem can be solved by providing a partition wall that can be pulled out by a pull ring or the like in the pouring hole. In this case, however, the mechanism becomes complicated and the cost is increased, or the small diameter pouring hole is plugged. There is a problem that it is technically difficult to provide a partition wall that can be used.

  The present invention has an object to solve the above problems, and in a nozzle type screw cap that forms a small-diameter spout, it is possible to enhance the sealing performance and prevent the entry of shower water at the time of heating and filling, It is an object of the present invention to provide a screw cap that can prevent liquid leakage or the like when a container falls or falls and receives an impact.

In order to solve the above-mentioned problem, the present invention is a screw cap comprising a cap body that is attached to a mouth tube portion of a container body as a screw cap, and an upper lid that is opened and closed with a screw on the cap body. Is a pipe cylinder, an upper wall part with a pour cylinder part standing on the inner periphery, an outer cylinder wall suspended from the periphery of the upper wall part, and a link connected to the lower end of the outer cylinder wall. The pour tube portion includes an upper pour tube and a lower inner tube wall, the outer tube wall is provided with a threaded portion on the outer periphery, and the engagement tube portion is formed on the container body. A ring-shaped upper wall, an inner cylinder, and an outer cylinder that are fitted to the mouth tube part are provided, and the upper lid is provided with a top wall part and a side peripheral wall that is suspended from the outer peripheral edge of the top wall part. wall, a ring-shaped top wall which is continuously provided from the side wall inner peripheral upper end, and an outer peripheral wall which is vertically provided from the inner edge of the ring-shaped top wall, communicating provided continuously to the inner peripheral lower end of the outer peripheral wall A back wall of the top wall, comprising a wall, an inner peripheral wall that is erected from the inner peripheral edge of the connecting wall and whose inner periphery engages with the outer periphery of the inner cylindrical wall, and a top wall that is connected to the inner peripheral upper end of the inner peripheral wall in a configuration in which the sealing plug fitted tightly the pouring cylinder inner is disposed on the inner peripheral lower portion of the side wall, wherein the female threaded portion to be screwed to the external thread portion of the outer tubular wall is provided Is adopted.

  As an example of the upper lid, the height of the inner peripheral wall of the top wall portion is set lower than the height of the outer peripheral wall, and the height of the top wall is set lower than the height of the ring-shaped top wall. Further, the upper lid adopts a configuration characterized in that the side peripheral wall, the ring-shaped top wall, and the outer peripheral wall are formed thinner than the other walls.

  As another embodiment of the screw cap, a screw cap comprising a cap body attached to the mouth tube portion of the container body and an upper lid that is opened and closed with a screw on the cap body, the cap body comprising a dispensing cylinder, an upper wall Part, an inner cylindrical wall erected at a predetermined position on the upper surface of the upper wall part, an outer cylindrical wall erected on the peripheral edge of the upper wall part, and an engaging cylindrical part. A threaded portion is provided on the outer periphery, and the engaging tube portion is composed of a ring-shaped upper wall, an inner tube, and an outer tube that are fitted to the mouth tube portion of the container body, and the upper lid is a top wall, A sealing plug disposed at the center of the back surface of the top wall, an inner peripheral wall that is suspended at a predetermined position on the back surface of the top wall, and whose inner periphery engages with the outer periphery of the inner cylinder wall, and a peripheral wall of the top wall. It is provided with a side peripheral wall provided, and has a feature and configuration in which a female screw portion that is screwed into a male screw portion of the outer cylindrical wall is provided on the inner periphery of the side peripheral wall.

  Furthermore, as another embodiment of the screw cap, a small-diameter male screw portion having the same screw pitch as the male screw portion is provided on the outer periphery of the inner cylindrical wall of the cap main body, and a small-diameter male screw portion is provided on the inner peripheral wall inner periphery of the upper lid. The structure characterized by the small diameter internal thread part screwed together in this is employ | adopted.

  As an example of the upper lid, at the lower end of the side peripheral wall of the upper lid, a flange that covers the upper wall of the engagement cylinder portion of the cap body, an end peripheral wall that is suspended from the periphery of the flange, and covers the outer cylinder; A structure in which a sealing ring connected to the lower end of the peripheral wall via a plurality of breakable connecting pieces is provided, and the inner periphery of the sealing ring and the outer periphery of the outer cylinder are fitted after the stoppering, and the cap A jumping protrusion and an annular recess are formed on the outer periphery of the outer cylinder of the main body, and a locking protrusion that fits into the annular recess of the outer cylinder is provided on the inner periphery of the sealing ring. The configuration is characterized in that a knurling is provided on the outer periphery of the outer cylinder of the cap body, and a knurling that engages with the knurling of the outer cylinder is provided on the inner periphery of the sealing ring.

In the screw cap of the present invention, when the lid is closed, the side peripheral wall of the upper lid and the outer cylindrical wall of the cap body are screwed together, and the sealing plug of the top wall is fitted into the inner periphery of the dispensing cylinder of the dispensing cylinder part. In addition, since the inner peripheral wall inner periphery of the upper lid and the inner cylindrical wall outer periphery of the cap body are engaged, the sealing performance of the cap main body and the upper lid can be strengthened, and intrusion of shower water, etc. can be prevented. Even if the liquid drops or a large impact is applied to the corner or side of the upper lid, the impact is absorbed and the seal is not broken and liquid leakage can be prevented.
Further, since the sealing ring is continuously provided at the lower end of the upper lid via a plurality of breakable connecting pieces, unauthorized opening or inadvertent opening can be prevented.

It is a figure which shows the state which plugged and installed the screw cap of 1st Example of this invention to the container main body, (a) is a top view, (b) is a cross-sectional side view. It is a principal part expansion explanatory view of Drawing 1, (a) is before a lid opening, and (b) is after a lid opening. It is explanatory drawing at the time of a container fall. It is a section side view showing the state where the screw cap of the 2nd example of the present invention was plugged and installed in the container main part. It is a section side view showing the state where the screw cap of the 3rd example of the present invention was plugged and installed in the container main part. FIG. 6 is an enlarged explanatory view of the main part of FIG. 5, (a) before opening the lid and (b) after opening the lid. It is a section side view showing the state where the screw cap of another example of the 3rd example of the present invention was plugged and installed in the container main part.

  Next, examples of the screw cap of the present invention will be described with reference to the drawings.

In FIG. 1, A is a cap body, B is an upper lid screwed to the cap body A, C is a sealing ring that is detachably connected to the upper lid B, and D is a container body.
The container main body D has an engaging protrusion 2 protruding from the outer periphery of the mouth tube portion 1.

  The cap main body A includes a pouring cylinder portion 5 that forms a pouring outlet for pouring the content liquid, an upper wall portion 6 that is provided with a pouring cylinder portion 5 on the inner peripheral edge, and that is inclined outward and downward, and an upper wall portion. 6 comprises an outer cylindrical wall 7 that is suspended from the periphery of 6 and an engaging cylindrical portion 8 that is connected to the lower end of the outer cylindrical wall 7.

  The pouring cylinder part 5 passes through an upper pouring cylinder 10 in which a trumpet-shaped end 9 for guiding pouring liquid is formed at the tip, and an enlarged diameter step part 11 inclined outwardly from the lower end of the pouring cylinder 10. A lower inner cylindrical wall 12 is provided.

  The outer cylindrical wall 7 is provided with a threaded portion 13 on the outer periphery, and an engaging cylindrical portion 8 is continuously provided at the lower end portion.

  The engagement cylinder portion 8 includes a ring-shaped upper wall 14 in which the outer cylinder wall 7 is erected on the inner peripheral edge, an inner cylinder 15 suspended from the inner peripheral edge of the upper wall 14, and an outer peripheral edge of the upper wall 14. The outer cylinder 16 is provided vertically.

As shown in FIG. 2 (a), the outer cylinder 16 has an overhanging ridge 18 having an upper inclined surface 17 into which the sealing ring C can be fitted from above and a lower portion of the overhanging ridge 18. An annular recess 19 and a lower end locking portion 20 that protrudes outward at the lower end of the annular recess 19 are provided.
Further, an engagement protrusion 21 that engages with a lower end portion of the engagement protrusion 2 of the mouth tube portion 1 of the container main body D is provided at the inner peripheral lower portion of the outer cylinder 16, and the screw cap is connected to the container main body D. Then, the engagement protrusion 2 and the engagement protrusion 21 of the container body D are engaged with each other, and the container body D is inserted into the fitting groove formed by the inner cylinder 15, the outer cylinder 16, and the upper wall 14. The mouth tube portion 1 is fitted and attached.

  As shown in FIG. 1, the upper lid B includes a top wall portion 25, a side peripheral wall 26 that is suspended from the outer peripheral edge of the top wall portion 25, and a flange portion 27 that is connected to the outer periphery of the lower end of the side peripheral wall 26, It consists of an end peripheral wall 29 that is suspended from the periphery of the flange 27 and that is connected to the sealing ring C via a plurality of breakable connecting pieces 28 at the lower end.

  The top wall portion 25 is connected to the ring-shaped top wall 30 provided continuously from the inner peripheral upper end of the side peripheral wall 26, the outer peripheral wall 31 provided vertically from the inner edge of the ring-shaped top wall 30, and the inner peripheral lower end of the outer peripheral wall 31. A ring-shaped connecting wall 32 provided, an inner peripheral wall 33 erected from the inner peripheral edge of the connecting wall 32, and a top wall 34 connected to the inner peripheral upper end of the inner peripheral wall 33. On the back surface of 34, a sealing plug 35 is disposed, the outer periphery of which is tightly fitted to the inner periphery of the pouring cylinder 10 of the cap body A when the lid is closed.

The inner peripheral wall 33 is formed so that the inner peripheral lower portion engages with the outer periphery of the inner cylindrical wall 12 of the extraction cylindrical portion 5 of the cap body A when the lid is closed.
The height of the inner peripheral wall 33 is set lower than the height of the outer peripheral wall 31, and the height of the top wall 34 is set lower than the height of the ring-shaped top wall 30.

  The side peripheral wall 26 is provided with a female thread portion 36 that is screwed into the male thread portion 13 of the outer cylindrical wall 7 of the cap body A at the inner peripheral lower portion.

The upper lid B is connected to an annular outer lid portion B1 composed of an outer peripheral wall 31 of the top wall portion 25, a ring-shaped top wall 30 and a side peripheral wall 26, and a connection wall 32 inside the outer lid portion B1. It is divided into an inner lid portion B2 made up of a top wall 34 and an inner cylindrical portion 33.
The wall thickness of the outer lid portion B1 is formed thinner than the wall thickness of the inner lid portion B2.

  As shown in FIG. 2A, the sealing ring C is provided with a locking ridge 40 that fits into the annular recess 19 over the ridge 18 of the outer cylinder 16 of the cap body A on the inner peripheral surface. Yes.

Next, usage modes and operational effects of this embodiment will be described.
First, the upper lid B integrally provided with the sealing ring C is attached to the cap body A.
At this time, the female threaded portion 36 of the side peripheral wall 26 of the upper lid B and the external threaded portion 13 of the outer cylindrical wall 7 of the cap body A are screwed together, and the dispensing cylindrical portion 5 is fitted to the inner periphery of the inner peripheral wall 33 of the top wall portion 25. The outer periphery of the inner cylindrical wall 12 is fitted.
Further, the sealing plug 35 of the top wall portion 25 is fitted into the inner periphery of the dispensing tube 10 of the dispensing tube portion 5 and sealed.

As the screwing of the upper lid B proceeds, the sealing ring C descends, and the lower part of the locking ridge 40 of the sealing ring C comes into contact with the upper inclined surface 17 of the overhanging ridge 18 of the outer cylinder 16 of the cap body A. However, since the outer cylinder 16 has not yet been fitted into the container body D, the outer cylinder 16 is easily deformed, and the locking ridge 40 gets over the ridge 18 and fits into the annular recess 19.
Thereafter, the lower surface of the collar portion 27 of the upper lid B comes into contact with the upper wall 14 of the cap body A, and the tightening of the upper lid B to the cap body A is completed, so that the cap body A, the upper lid B, and the sealing ring C Is assembled into a screw cap.

When the screw cap is assembled, the engaging cylinder portion 8 of the cap body A is fitted into the mouth tube portion 1 of the container body D filled with the contents and plugged from above the upper lid B. Is fitted into a fitting groove formed by the inner cylinder 15, the outer cylinder 16, and the upper wall 14, and is attached to the container body D as shown in FIG. 1.
At this time, the diameter of the outer cylinder 16 is slightly increased by the fitting of the mouth tube portion 1, and the sealing ring C is firmly fitted into the annular recess 19 of the locking protrusion 40, and can be easily removed from the cap body A. It becomes impossible to leave.

  In the screw cap of the present embodiment, when the lid is closed, the female screw portion 36 of the side peripheral wall 26 of the upper lid B and the screw portion 13 of the outer cylindrical wall 7 of the cap body A are screwed together, and the top wall portion 25 Since the sealing plug 35 is fitted into the inner circumference of the dispensing cylinder 10 of the dispensing cylinder portion 5 and the outer circumference of the inner cylindrical wall 12 of the dispensing cylinder portion 5 is fitted into the inner circumference of the inner circumferential wall 33 of the top wall portion 25, The sealing performance of the cap body A and the upper lid B can be strengthened.

Even if the container falls and a large impact is applied to the corner or side of the side peripheral wall 26 of the upper lid B, as shown in FIG. 3, the side peripheral wall 26 and the ring-shaped top wall 30 of the outer lid B1. At the same time, the outer peripheral wall 31 is deformed to absorb the impact.
Even if an attempt is made to deform the lower portion of the inner peripheral wall 33 via the connecting wall 32 due to the deformation of the outer lid B1 due to an impact, the inner periphery of the inner peripheral wall 33 and the outer periphery of the inner cylindrical wall 12 of the extraction cylinder portion 5 are engaged. Since the shape retaining property of the lower part of the inner peripheral wall 33 is strengthened, it is possible to prevent deformation due to an impact on the inner lid portion B2.

  By preventing the deformation of the outer peripheral wall 31 and the deformation of the inner lid B2 itself, even if the container falls or a large impact is applied to the upper lid B, the sealing plug 35 and the cap body of the inner lid B2 A close fit with the inner periphery of the pouring tube 10 of A is maintained, the seal is not broken, and liquid leakage can be prevented.

In order to open the screw cap mounted on the container body D, the upper cover B can be easily opened by rotating the cap lid A in the screwing direction and raising it.
When the upper lid B rotates and begins to rise with respect to the cap body A, the sealing ring C also rotates and rises, but the locking ridge 40 engages with the overhanging ridge 18 to prevent the rise. The relatively thin connecting piece 28 is broken.
As shown in FIG. 2 (b), even when the upper lid B is removed, the separated sealing ring C is engaged with the lower end locking portion 20 provided with the locking protrusion 40 at the lower end of the annular recess 19. It stays in the annular recess 19 and does not fall on the spot.
By observing the breaking state of the connecting piece 28 that connects the upper lid B and the sealing ring C, unauthorized opening or inadvertent opening can be prevented.

When the cap main body A is separated and discarded from the container main body D after using the container, if the force is applied to further pull down the sealing ring C, the locking ridge 40 causes the lower end locking portion 20 of the outer cylinder 16 to move. Overcoming, the sealing ring C is separated from the outer cylinder 16.
The cap body A from which the sealing ring C is separated can be easily separated from the container body D and discarded.
In this way, the lower end locking portion 20 and the locking protrusion 40 are set to a slight degree of fitting so that the sealing ring C can be prevented from falling, but can be easily overcome by applying force. .

  In the above-described embodiment, the upper wall portion 6 and the enlarged diameter step portion 11 are inclined to the outside and downward. However, the upper wall portion 6 and the enlarged diameter step portion 11 may be horizontally extended without being inclined. The shape of the diameter step part 11 is not limited to the shape of the said Example.

Next, a second embodiment to which a configuration for further improving the sealing performance of the screw cap is added will be described with reference to the drawings.
Hereinafter, the same components as those in the first embodiment are denoted by the same reference numerals, and the added configuration will be mainly described.

As shown in FIG. 4, a small-diameter male screw portion 45 having a smaller diameter than the male screw portion 13 of the outer cylindrical wall 7 is provided on the outer periphery of the inner cylindrical wall 12 of the extraction cylindrical portion 5 of the cap body A.
The small-diameter male screw portion 45 and the male screw portion 13 have the same screw pitch.

  On the inner periphery of the inner peripheral wall 33 of the top wall portion 25 of the upper lid B, a small-diameter female screw portion 50 that is screwed into the small-diameter male screw portion 45 of the inner cylindrical wall 12 is provided.

The use mode and operational effects of the present embodiment will be described.
When the upper lid B integrally provided with the sealing ring C of this embodiment is screwed into the cap main body A, when the upper lid B is screwed into the cap main body A, the male screw portion 13, the female screw portion 36 and the small diameter Since the screw portion 45 and the small diameter female screw portion 50 have the same screw pitch, they can be screwed together without interfering with each other.

The outer periphery of the inner cylindrical wall 12 of the pouring cylinder portion 5 of the cap body A and the inner periphery of the inner peripheral wall 33 of the top wall portion 25 of the upper lid B are screwed together by the small diameter male screw portion 45 and the small diameter female screw portion 50. By doing so, compared with the closed lid of Example 1, sealing performance can be strengthened.
Further, the outer periphery of the inner cylindrical wall 12 and the inner periphery of the inner peripheral wall 33 are strongly engaged in the vertical direction by screw fitting, so that the shape retention of the lower portion of the inner peripheral wall 33 is enhanced, and the inner lid portion B2 It is possible to prevent deformation due to an impact on the.
Other configurations are the same as those in the first embodiment.

Next, a third embodiment in which the configuration of the screw cap and the configuration of the sealing ring are changed will be described with reference to the drawings.
Hereinafter, the same components as those in the first embodiment are denoted by the same reference numerals, and the added configuration will be mainly described.

  In FIG. 5, E is a cap body, F is an upper lid attached to the cap body E, G is a sealing ring that is detachably connected to the upper lid F, and D is a container body.

The cap main body E includes a pouring tube 55 that forms a pouring port for pouring the content liquid, an upper tube portion 56 that is erected on the inner peripheral edge and that is inclined outward and downward, and an upper wall portion 56. An inner cylinder wall 57 erected at a predetermined position on the upper surface, an outer cylinder wall 58 erected on the periphery of the upper wall part 56, and an engagement cylinder part 59 provided continuously on the periphery of the upper wall part 56. It is made up of.
The dispensing cylinder 55 has a trumpet-shaped end 9 that guides the dispensing liquid at the tip.

A small diameter male screw portion 60 is provided on the outer periphery of the inner cylindrical wall 57.
On the outer periphery of the outer cylindrical wall 58, a male screw portion 61 having a diameter larger than that of the small diameter male screw portion 60 is provided.
The small-diameter male screw portion 60 and the male screw portion 61 have the same screw pitch.

  The engagement cylinder part 59 includes a ring-shaped upper wall 14 in which the lower end edge of the upper wall part 56 is connected to the inner peripheral edge, an inner cylinder 15 suspended from the inner peripheral edge of the upper wall 14, and the upper wall 14. It consists of an outer cylinder 62 that is suspended from the outer periphery.

As shown in FIG. 6A, a knurl 63 is provided on the outer periphery of the outer cylinder 62 over the entire periphery.
In addition, an engagement protrusion 21 that engages with a lower end portion of the engagement protrusion 2 of the mouth tube portion 1 of the container body D is provided at the lower portion of the inner periphery of the outer cylinder 62, and the screw cap is connected to the container body D. Then, the engagement protrusion 2 and the engagement protrusion 21 of the container main body D are engaged with each other, and the container main body D is inserted into the fitting groove formed by the inner cylinder 15, the outer cylinder 62, and the upper wall 14. The mouth tube portion 1 is fitted and attached.

  As shown in FIG. 5, the upper lid F includes a top wall 65, a sealing plug 35 disposed at the center of the back surface of the top wall 65, and an inner peripheral wall 66 that is suspended at a predetermined position on the back surface of the top wall 65. A side peripheral wall 67 suspended from the outer peripheral edge of the top wall 65, a flange portion 27 provided continuously to the outer periphery of the lower end of the side peripheral wall 67, and a plurality of fractures at the lower end portion. It consists of an end peripheral wall 29 that connects the sealing ring G through a possible connecting piece 28.

On the inner periphery of the inner peripheral wall 66, a small-diameter female screw portion 68 that is screwed into the small-diameter male screw portion 60 of the inner cylindrical wall 57 of the cap body E is provided.
On the inner periphery of the side peripheral wall 67, a female screw portion 69 that is screwed into the male screw portion 61 of the outer cylindrical wall 58 is provided.

As shown in FIG. 6A, the sealing ring G has knurls 70 engraved on the inner peripheral surface over the entire circumference, and the number of knurls 70 is the number of knurls 63 of the outer cylinder 62 of the cap body E. Is the same as the number.
Other configurations are the same as those in the first embodiment.

Next, usage modes and operational effects of this embodiment will be described.
First, the upper lid F integrally provided with the sealing ring G is attached to the cap body E.
At this time, the female thread portion 69 of the side peripheral wall 67 of the upper lid F and the external thread portion 61 of the outer cylindrical wall 58 of the cap body E, and the small diameter female thread portion 68 of the inner peripheral wall 66 and the small diameter male thread portion of the inner cylindrical wall 57. The small-diameter female screw portions 68 screwed to 60 are screwed together without interfering with each other.
Further, the sealing plug 35 of the top wall 65 is fitted into the inner periphery of the dispensing cylinder 55 and sealed.

  When the screwing of the upper lid F proceeds, the sealing ring G descends together with the upper lid F and is located outside the outer cylinder 62 of the cap main body E. The screw cap in which the cap main body E, the upper lid F and the sealing ring G are integrated. Is assembled.

As shown in FIG. 5, the assembled screw cap is fitted from the upper lid F by fitting the engagement tube portion 59 of the cap body E into the mouth tube portion 1 of the container body D filled with the contents. Further, the mouth tube portion 1 is fitted into the fitting groove formed by the inner tube 15, the outer tube 62, and the upper wall 14, and is mounted on the container body D.
At this time, the outer tube 62, the mouth tube portion 1 and the engagement protrusion 2 are fitted, and the outer tube 62 itself is slightly enlarged in diameter, so that the knurl 63 and the sealing ring G on the outer periphery of the outer tube 62 are The knurling 70 is firmly meshed so that the sealing ring G is fitted into the outer cylinder 62 and cannot be easily detached.

  In the screw cap of the present embodiment, when the lid is closed, the female screw portion 69 of the side peripheral wall 67 of the upper lid F and the screw portion 61 of the outer cylindrical wall 58 of the cap body E are screwed together, and the top wall 65 is sealed. Since the plug 35 is fitted into the inner periphery of the dispensing cylinder 55 and the inner periphery of the inner peripheral wall 66 and the outer periphery of the inner cylindrical wall 57 are screwed together, the sealing performance of the cap body E and the upper lid F can be enhanced.

Even if the container falls and a large impact is applied to the corner or side of the side peripheral wall 67 of the top lid F, even if the impact is transmitted from the outside of the top wall 65, the container is suspended from the top wall 65. The inner cylindrical wall 57 of the cap main body A engaged with the inner periphery of the inner peripheral wall 66 becomes a resistance, and the inner peripheral wall 66 and the inner cylindrical wall 57 absorb the impact, and are located on the inner side of the inner cylindrical wall 57. It is possible to prevent an impact from being transmitted to the top wall 65.
By not transmitting an impact to the top wall 65 on the inner side of the inner cylinder wall 57, the tight fitting between the sealing plug 35 and the inner periphery of the extraction cylinder 55 of the cap body E is maintained, and the seal is not broken and liquid leakage is prevented. be able to.

In order to open the screw cap mounted on the container body D, the upper cover F can be easily opened by rotating the upper cover F in the screwing direction with respect to the cap body E and raising it.
When the upper lid F rotates and starts to rise with respect to the cap body E, the sealing ring G is fitted to the outer cylinder 62, so that the rotation and elevation are prevented, and the relatively thin wall connecting the upper lid F and the sealing ring G is connected. The connecting piece 28 is broken.
As shown in FIG. 6B, even if the upper lid F is removed, the separated sealing ring G is fitted to the outer cylinder 62 and therefore does not fall on the spot.
By observing the breaking state of the connecting piece 28 that connects the upper lid F and the sealing ring G, unauthorized opening or inadvertent opening can be prevented.

When the cap body E is separated and discarded from the container body D after the container is used, the sealing ring G and the outer cylinder 62 are engaged with each other by meshing the knurls 70 and 63 when the sealing ring G is pulled up. Therefore, the degree of fitting in the upward direction is weak and can be easily removed from the outer cylinder 62.
The cap main body E from which the sealing ring G is separated becomes weakly fitted between the outer cylinder 62 and the mouth tube portion 1 of the container main body D, and can be easily separated from the container main body D and discarded.

  In the above embodiment, the small-diameter male screw portion 60 is provided on the outer periphery of the inner cylindrical wall 57 of the cap body E, and the small-diameter female screw portion 68 is provided on the inner peripheral wall 66 of the upper lid F. Even if it is transmitted from the outside, the shock is not transmitted to the top wall 65 inside the inner cylindrical wall 57, but if only the shock is not transmitted, a screw configuration is provided as shown in FIG. Instead, the outer periphery of the inner cylindrical wall 57 of the cap body E may be inserted into and engaged with the inner periphery of the inner peripheral wall 66 of the upper cover F when the cover is closed.

In the third embodiment, a knurling 63 is provided on the outer periphery of the outer cylinder 62 of the cap body E, a knurling 70 is provided on the inner periphery of the sealing ring G, and after the stoppering, the knurling 63 and the knurling 70 are firmly engaged, The outer cylinder 62 is fitted, but as in the first and second embodiments, the outer periphery of the outer cylinder of the cap body is provided with a jumping ridge, an annular recess, and a lower end locking portion, and a sealing ring C A locking protrusion may be provided on the inner periphery of the sealing ring G so that the sealing ring G is fitted to the outer cylinder 62.
Further, in the first and second embodiments, a knurling is provided on the outer circumference of the outer cylinder of the cap body, a knurling is provided on the inner circumference of the sealing ring, the knurling and the knurling are firmly meshed, and the sealing ring is fitted to the outer cylinder. It may be.

  The screw cap of the present invention can improve the sealing performance between the cap body and the upper lid, prevent liquid leakage, and prevent unauthorized opening, etc., and therefore requires strict hygiene management of food and the like. It can be widely applied as a cap for liquid containers, and is particularly suitable for application to liquid seasoning containers such as dressings.

A, E Cap body B, F Upper lid B1 Outer lid portion B2 Inner lid portion C, G Sealing ring D Container body 1 Mouth tube portion 2 Engaging projection 5 Extraction tube portion 6, 56 Upper wall portion 7, 58 Outer tube Walls 8 and 59 Engagement tube portion 9 Trumpet-shaped end portion 10 and 55 Outlet tube 11 Expanded stepped portion 12 and 57 Inner tube wall 13 and 61 Male thread portion 14 Upper wall 15 Inner tube 16 and 62 Outer tube 17 Upper slope Surface 18 Riding ridge 19 Annular recess 20 Lower end locking part 21 Engaging protrusion 25 Top wall part 26, 67 Side peripheral wall 27 Gutter part 28 Connecting piece 29 End peripheral wall 30 Ring-shaped top wall 31 Outer peripheral wall 32 Connecting wall 33, 66 Inner peripheral wall 34, 65 Top wall 35 Seal plug 36, 69 Female thread part 40 Locking protrusion 45, 60 Small diameter male thread part 50, 68 Small diameter female thread part 63, 70 Knurl

Claims (8)

A screw cap comprising a cap body attached to the mouth tube portion of the container body, and an upper lid that is opened and closed with a screw on the cap body,
The cap body is connected to the pouring tube portion, the upper wall portion in which the pouring tube portion is erected on the inner periphery, the outer tube wall extending from the periphery of the upper wall portion, and the lower end of the outer tube wall. The engagement cylinder part,
The dispensing cylinder part has an upper dispensing cylinder and a lower inner cylinder wall,
The outer cylindrical wall is provided with a threaded portion on the outer periphery,
The engagement tube portion includes a ring-shaped upper wall, an inner tube, and an outer tube that are fitted to the mouth tube portion of the container body,
The upper lid includes a top wall portion and a side wall suspended from the outer peripheral edge of the top wall portion,
The top wall portion includes a ring-shaped top wall provided continuously from the inner peripheral upper end of the side peripheral wall, an outer peripheral wall suspended from the inner edge of the ring-shaped top wall, and a connecting wall provided continuous to the inner peripheral lower end of the outer peripheral wall. An inner peripheral wall that is erected from the inner peripheral edge of the connecting wall and whose inner periphery engages with the outer periphery of the inner cylindrical wall; and a top wall that is connected to the inner peripheral upper end of the inner peripheral wall;
A sealing plug that tightly fits the inner periphery of the dispensing cylinder is disposed on the back surface of the top wall,
A screw cap characterized in that a female thread portion that is screwed into an external thread portion of an outer cylindrical wall is provided at a lower inner peripheral portion of the side peripheral wall.   2. The screw cap according to claim 1, wherein the height of the inner peripheral wall of the top wall portion is set lower than the height of the outer peripheral wall, and the height of the top wall is set lower than the height of the ring-shaped top wall. .   The screw cap according to claim 1 or 2, wherein the upper lid is formed such that the thickness of the side peripheral wall, the ring-shaped top wall, and the outer peripheral wall is thinner than the thickness of the other walls. A screw cap comprising a cap body attached to the mouth tube portion of the container body, and an upper lid that is opened and closed with a screw on the cap body,
The cap main body is engaged with a dispensing cylinder, an upper wall part, an inner cylindrical wall standing at a predetermined position on the upper surface of the upper wall part, and an outer cylindrical wall standing on the periphery of the upper wall part It consists of a cylinder part,
The outer cylindrical wall is provided with a threaded portion on the outer periphery,
The engagement cylinder part is composed of a ring-shaped upper wall, an inner cylinder, and an outer cylinder that are fitted to the mouth cylinder part of the container body,
The upper lid is a top wall, a sealing plug disposed at the center of the back surface of the top wall, an inner peripheral wall that is suspended at a predetermined position on the back surface of the top wall, and whose inner periphery engages with the outer periphery of the inner cylindrical wall; Comprising a side wall suspended from the outer periphery of the top wall,
A screw cap characterized in that a female thread portion that is screwed into a male thread portion of the outer cylindrical wall is provided on the inner periphery of the side peripheral wall. A small-diameter male screw part with the same screw pitch as the male screw part is provided on the outer periphery of the inner cylindrical wall of the cap body.
The screw cap according to any one of claims 1 to 4, wherein a small-diameter female screw portion that is screwed into the small-diameter male screw portion is provided on the inner periphery of the inner peripheral wall of the upper lid. At the lower end of the side peripheral wall of the upper lid, a flange that covers the upper wall of the engaging cylinder portion of the cap body, an end peripheral wall that is suspended from the periphery of the flange, covers the outer cylinder, and a plurality of lower ends of the end peripheral wall A sealing ring that is continuously provided via a breakable connecting piece is provided,
The screw cap according to any one of claims 1 to 5, wherein the inner periphery of the sealing ring and the outer periphery of the outer cylinder are fitted after the stopper is plugged. On the outer periphery of the outer cylinder of the cap body, a jumping ridge and an annular recess are formed,
The screw cap according to claim 6, wherein a locking protrusion that fits into the annular recess of the outer cylinder is provided on the inner periphery of the sealing ring . A knurl is provided on the outer periphery of the outer cylinder of the cap body,
The screw cap according to claim 6, wherein a knurling meshing with a knurling of the outer cylinder is provided on an inner periphery of the sealing ring.

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