JP2022055995A - Hinge cap - Google Patents

Abstract

To provide a hinge cap that, when a top cover is lifted at the time of opening, can improve operability at the time of opening by joining a transition plug and the top cover.SOLUTION: A hinge cap comprises a cap body A attached to a container body D, and a top cover B connected to the cap body A via a hinge C. The cap body A comprises: a partition wall 5 which seals a mouth 1 of the container body D; a pour-out cylinder 6 erected on the partition wall 5; a transition plug 10 which is defined on the partition wall 5 in the pour-out cylinder 6 by a breakable thin-walled weakened part 8; and an opening 12 formed in the transition plug 10. The top cover B comprises: a top wall 30; a sealing cylinder 32 which is suspended from an undersurface of the top wall 30, and seals the pour-out cylinder 6; and an engagement protrusion 35 which is suspended from the undersurface of the top wall 30 inside the sealing cylinder 32. The engagement protrusion 35 of the top cover B is fitted in the opening 12 of the transition plug 10 at the time of cover opening, and thereafter, is joined.SELECTED DRAWING: Figure 1

Description

The present invention relates to a hinge cap attached to a container body and used, and particularly to a hinge cap having a transition plug that breaks a thin-walled weakened portion and shifts to the upper lid side at the first opening of the lid.

Conventionally, in a hinge cap consisting of a cap body attached to the container body and an upper lid connected to the cap body via a hinge, a spout opening is opened in the partition wall of the cap body in order to ensure the sealing property of the container body. As a planned portion, a breakable thin-walled weakened portion was defined to form a removed portion provided with a pull ring or the like.
However, in order to open the removed part, after opening the top lid, it is necessary to pull up the pull ring etc. to cut off the removed part, which is troublesome and difficult for a weak user to open. there were.

Therefore, it is conceivable to eliminate the removal part and open the spout in advance, but in this case, since there is a problem in the sealing property of the container body, the pull ring is omitted and the partition wall inside the spout cylinder is used. As a planned opening of the spout, a chevron-shaped transition plug defined by a thin-walled weakened portion is provided, the lid is closed after molding, and the transition plug of the cap body and the top wall of the upper lid are joined by ultrasonic welding or the like. , A hinge cap that pulls up a transition plug to break and open a thin-walled weakened portion together with opening the upper lid has been conventionally known (see, for example, Patent Document 1).

Further, the hinge cap described in Patent Document 1 needs to be closed after molding, and the upper surface of the transition plug and the lower surface of the top wall need to be brought into contact with each other and joined by ultrasonic welding or the like. Was not enough.
For this reason, it is conceivable to join the upper lid and the transition plug by a separate member, or to form a through hole in the upper lid and insert the convex portion formed in the transition plug into the through hole to join.

Japanese Unexamined Patent Publication No. 2014-221643

However, in the hinge cap described in Patent Document 1, the entire circumference of the transition plug defined in the planned opening portion is pulled up by lifting the upper lid at the time of opening, so that a large force is applied when the thin-walled weakened portion is started to break. There is a problem that the strength of the joint portion due to ultrasonic welding or the like is not sufficient.
Further, even if the above alternative plan is adopted, there is a problem that traces of through holes remain on the upper lid and the appearance is poor.

An object of the present invention is to solve the above problems, and when the hinge cap is opened and the upper lid is lifted, the transition plug and the upper lid are firmly joined to improve the operability at the time of opening. It is intended to provide a hinge cap.

In order to solve the above problems, the present invention is a hinge cap including a cap body attached to the mouth of the container body and an upper lid connected to the cap body via a hinge as a hinge cap. The cap body consists of a partition wall that closes the mouth of the container body, a dispenser tube erected on the partition wall, a transition plug defined by a breakable thin-walled weakened portion on the partition wall inside the dispenser tube, and a transition plug. The top lid is suspended from the top wall and the underside of the top wall to seal the pouring cylinder, and inside the sealed cylinder, from the bottom surface of the top wall. It is provided with a hooked convex portion, and the hooked convex portion of the upper lid adopts a configuration characterized in that it is fitted into the opening of the transition plug at the time of closing the lid and then joined.

As an embodiment of the hinge cap, the transition plug is configured to include a bite recess formed on the outer lower surface of the opening, and the engaging convex portion has a regulating rib on the upper outer periphery that abuts on the transition plug. The configuration is characterized in that the transition plug is provided with a guide wall formed on the outer upper surface of the opening, and the transition plug is provided from the hinge side along the inside of the thin-walled weakened portion. It is provided with a holding wall that is erected in the vertical direction, and the upper lid is provided with a holding receiving wall that is hung from the lower surface of the top wall and engages with or abuts on the holding wall.

By adopting the above configuration, the hinge cap of the present invention can improve the operability at the time of opening by firmly joining the upper lid and the transition plug when the upper lid is lifted at the time of opening.
In addition, since the structure is such that the transition plug on the hinge side is stably held after opening, it is possible to suppress the contamination inside and outside the container due to the content liquid.

It is a figure which shows the state before opening which attached the hinge cap which is 1st Embodiment of this invention to a container body, (a) is a side sectional view, (b) is the main part enlarged part of (a). It is a figure which shows the opening state immediately after manufacturing of the hinge cap which is 1st Example of this invention, (a) is a top view, (b) is a side sectional view. It is a bottom view which shows the opening state immediately after manufacturing of the hinge cap which is 1st Example of this invention. It is a figure which shows the set state which closed the hinge cap which is 2nd Embodiment of this invention, (a) is a side sectional view, (b) is the main part enlarged part of (a). It is a figure which shows the set state which closed the hinge cap which is the 3rd Embodiment of this invention, (a) is a side sectional view, (b) is the main part enlarged part of (a).

Next, the hinge cap of the present invention will be described with reference to the drawings shown in the following examples.
In the following description, in FIG. 1, the left direction is the "front side (opposite the hinge side)", the right direction is the "back side (hinge side)", the upward direction is "up", and the downward direction. Is "below".

In FIG. 1, A is a cap body attached to the container body D, and B is an upper lid that opens and closes by connecting the cap body A with a hinge C.
An engaging ridge 2 is provided on the outer periphery of the mouth portion 1 of the container body D.

As shown in FIGS. 1 to 3, the cap body A is attached to the partition wall 5 that closes the mouth portion 1 of the container body D, the dispensing cylinder 6 that is erected from the upper surface of the partition wall 5, and the mouth portion 1. , It is composed of a mounting portion 7 having a partition wall 5 formed inward.

The partition wall 5 is provided with a transition plug 10 defined by a breakable thin-walled weakened portion 8 on the inner peripheral side of the pouring cylinder 6 in order to open the spout at the time of use.
The transition plug 10 includes a bottom wall 11 connected to the partition wall 5 via a thinning weakening portion 8, and the bottom wall 11 is formed with a circular opening 12 on the front side (opposite to the hinge C). On the back surface side (hinge C side), a holding standing wall 13 is erected from the upper surface along the inside of the thin wall weakening portion 8. The opening 12 is not limited to a circular shape and can be appropriately set.

In this embodiment, as shown in FIG. 2A, the shape of the tip portion 11a of the bottom wall 11 on the front side is formed into a sharp shape so that the thin-walled weakened portion 8 can be easily broken. Has been done.
Further, the holding standing wall 13 is provided from the back surface side to the vicinity of the opening 12, but the holding standing wall 13 is at least the bottom wall so as to suppress deformation (lifting, etc.) of the rear end portion 11b of the bottom wall 11. It suffices if it is provided around the rear end portion 11b of 11.

As shown in FIG. 1 (b), the opening 12 is formed with an inner peripheral surface 14 whose diameter is reduced in an inverted truncated cone shape from the upper end to the lower end, and the upper portion of the opening 12 has the inner peripheral surface 14 inside. A cylindrical guide wall 15 having a circumference is erected from the upper surface of the bottom wall 11, and a bite recess 16 formed from the lower surface of the bottom wall 11 is provided at the lower outer side of the opening 12.
In this embodiment, the guide wall 15 is erected from the upper surface of the bottom wall 11 in the opening 12, but the guide wall 15 may be omitted as in the second embodiment described later.

The biting recess 16 is formed in an annular shape by digging a diameter-expanded step portion 18 recessed from the lower surface of the bottom wall 11 at a predetermined depth, leaving the inner edge 18a of the step portion, and further, the biting recess 16 is formed. A plurality of engaging protrusions 17 are formed on the inner peripheral side in the radial direction.
As shown in FIG. 3, in this embodiment, eight engaging protrusions 17 are formed, but the number of engaging protrusions 17 can be increased or decreased as needed.
Further, the bottom wall 11 has a peripheral wall 19 formed on the outer peripheral side of the holding vertical wall 13 along the thinning weakening portion 8, and the peripheral wall 19 has a bank shape lower than the height of the holding vertical wall 13. ..

The mounting portion 7 is an inner cylinder 20 that is vertically suspended from the outer peripheral edge of the partition wall 5 and whose outer periphery is inserted into the inner circumference of the mouth portion 1 of the container body D, and an outer cylinder whose inner circumference engages with the outer circumference of the mouth portion 1. A 21 and an annular lid engaging portion 22 connected at the upper ends of the inner cylinder 20 and the outer cylinder 21 are provided, and an outwardly projecting bulging portion 23 is provided on the upper portion of the lid engaging portion 22. Has been done.
On the inner circumference of the outer cylinder 21, an engaging protrusion 24 that engages with the engaging ridge 2 provided on the outer periphery of the mouth 1 is provided.

As shown in FIG. 2, a substantially V-shaped outer peripheral cut portion 25 is cut from above on the outer peripheral surface in the vicinity of either the left or right side of the hinge C of the outer cylinder 21, and the inner circumference of the outer peripheral cut portion 25 is cut. The slit groove 26 is recessed from above so as to extend in a predetermined range in the circumferential direction on the back surface side starting from the position separated by the thin portion on the upper side.
Therefore, when the upper lid B of the hinge cap is pulled down through the hinge C when the container is discarded, the outer peripheral cut portion 25 becomes a vertical tear line, the slit groove 26 becomes a circumferential tear line, and the outer cylinder 21 has an outer peripheral cut. It is broken in the circumferential direction starting from the portion 25, and the engagement between the engaging protrusion 24 of the broken portion and the mouth portion 1 of the container body D is disengaged, and the hinge cap is easily pulled away from the container body D. It can be sorted and discarded.

As shown in FIGS. 1 to 3, the upper lid B is rotatably attached to the upper end of the outer circumference of the outer cylinder 21 of the cap body A via the hinge C, and has a flat top wall 30 and a top wall. It is provided with a side peripheral wall 31 hanging from the peripheral edge of 30.
The top wall 30 has a sealing cylinder 32 suspended from the lower surface and a holding receiving wall 33 on the hinge C side inside the sealing cylinder 32. The outer circumference of the sealing cylinder 32 is the inner circumference of the ejection cylinder 6 of the cap body A. The holding receiving wall 33 is provided so as to be in close contact with the holding wall 33 so that the tip of the inner peripheral edge engages with or abuts on the upper end of the outer periphery of the holding standing wall 13 of the transition plug 10.
Although not shown, the holding standing wall 13 and the holding receiving wall 33 need only be provided with at least one of them, and when only the holding standing wall 13 is provided, they are formed up to the vicinity of contact with or close to the top wall 30. However, when only the holding receiving wall 33 is provided, it is desirable to form it up to the vicinity of contact with or close to the transition plug 10.

In this embodiment, the inner circumference of the holding receiving wall 33 is engaged with or in contact with the outer circumference of the holding standing wall 13, but the outer circumference of the holding receiving wall 33 is engaged with or in contact with the inner circumference of the holding standing wall 13. Alternatively, the holding receiving wall 33 may have a front end surface engaged with or in contact with the upper end surface of the holding standing wall 13.
The holding receiving wall 33 is vertically installed at least in the range where the holding standing wall 13 is erected.
Further, the holding receiving wall 33 has a contact rib 34 formed in the center of the inner circumference of the hinge C side, and the inner circumference of the holding receiving wall 33 engages with the outer periphery of the holding standing wall 13 of the transition plug 10. Alternatively, it is provided so as to be close to or in contact with the upper end of the holding standing wall 13 when abutting.

Further, in the top wall 30, the engaging convex portion 35 is vertically provided from the lower surface on the front side in the sealed cylinder 32.
As shown in FIG. 1, the anchoring convex portion 35 includes a hem portion 36 having a columnar upper portion and a welding portion 38 having a lower portion gently reduced in diameter toward the lower side. In the example, in the middle of the engagement convex portion 35, the outer peripheral surface is inclined in an inverted truncated cone shape in accordance with the inner peripheral surface 14 of the opening 12, and the guide portion 37 connecting the hem portion 36 and the welding portion 38 is formed. It has become.
The engagement convex portion 35 is fitted into the opening 12 of the transition plug 10 when the lid is closed, the welded portion 38 reaches a position beyond the lower end of the opening 12, and the welded portion 38 is melted. It is expanded and welded so as to fill the biting recess 16 and the enlarged diameter step portion 18 on the lower surface of the bottom wall 11, and the upper lid B and the transition plug 10 are firmly joined.

The shape of the engaging convex portion 35 does not matter as long as it can be fitted into the opening 12. For example, although the lower surface portion of the welded portion 38 in this embodiment is planar, the welding of the welded portion 38 can be facilitated by providing a recess in the lower surface portion of the welded portion 38.
Further, the engaging convex portion 35 includes a regulating rib 39 projecting radially from the outer periphery of the hem portion 36, and as shown in FIG. 1 (b), the lower end surface of the regulating rib 39 is guided when the lid is closed. It is designed to come into contact with or be in close contact with the upper end surface of the wall 15.

A knob 40 is provided on the outer periphery of the lower end of the front side of the side peripheral wall 31 in an arc shape, and as shown in FIG. A locking convex portion 41 that engages with the inner peripheral side of the joint portion 22 is vertically provided, and an engaging concave portion 42 that engages with the bulging portion 23 of the lid engaging portion 22 to maintain the closed state is provided in the center. It is installed around.

Although not shown, the hinge cap of this embodiment is provided with a shrink label, a sealing member, or the like between the cap body A and the upper lid B in order to prevent unauthorized opening before use.

Next, the usage mode and the action and effect of this example will be described.
The hinge cap of this embodiment is manufactured by integral molding by injection molding using a mold.
As shown in FIGS. 2 and 3, the hinge cap manufactured by integral molding is obtained in an open state, and the upper lid B is rotated via the hinge C to be in the closed state shown in FIG. ..
At that time, since the engaging convex portion 35 of the upper lid B is reduced in diameter so as to be narrowed downward, it easily enters the inner peripheral surface 14 of the opening 12, and the welded portion 38 is from the lower end of the opening 12. The outer circumference of the guide portion 37 fits into the inner peripheral surface 14 as it reaches the lower side.
Further, the lower end surface of the restricting rib 39 projecting from the hem portion 36 abuts or approaches the upper end surface of the guide wall 15 to prevent the engaging convex portion 35 from entering the opening 12 too much. Can be done.

Further, the upper end of the outer circumference of the holding standing wall 13 engages with or comes into contact with the lower end of the inner circumference of the holding receiving wall 33, and the upper end of the holding standing wall 13 comes into contact with or comes into close contact with the lower end of the contact rib 34.
Further, the sealing cylinder 32 forms a sealing portion in close contact with the pouring cylinder 6, and the lid engaging portion 22 of the cap body A, the locking convex portion 41 of the upper lid B, and the engaging concave portion 42 are fitted to each other. Then, the lid is closed as shown in FIG.

In this embodiment, in the closed state, the welded portion 38 is expanded by melting from under the anchoring convex portion 35 using a melting jig or the like.
As shown in FIG. 1 (b), when the welded portion 38 of the engagement convex portion 35 is melted, the welded portion 38 spreads outward from the step portion inner edge 18a side of the enlarged diameter step portion 18 and engages along the biting concave portion 16. The welded portion 38 is deformed into a deformed welded portion 38a so as to cover the protrusion 17.
At this time, the deformed welded portion 38a is welded so as to fill the bite recess 16 and the enlarged diameter step portion 18 formed on the lower surface of the bottom wall 11, so that when the upper lid B is opened, the deformed welded portion 38a is welded. Since the contact area is increased by being in close contact with the engaging protrusion 17 of the biting recess 16, the engaging convex portion 35 of the upper lid B and the transition plug 10 of the cap body A are firmly joined.
Next, the closed hinge cap is attached by tapping the mouth portion 1 of the container body D filled with the content liquid.

When the hinge cap of this embodiment is used for the first time, the thin-walled weakened portion 8 provided on the partition wall 5 of the cap body A can be broken and opened by opening the upper lid B.
First, when the knob 40 of the upper lid B is lifted by hooking a finger, the bottom wall 11 on the front side is lifted, whereby the thin-walled weakened portion 8 on the front side begins to break, and by further lifting the upper lid B, the hinge C direction. The thin-walled weakened portion 8 is broken, and finally the thin-walled weakened portion 8 near the hinge C is broken, and the transition plug 10 is removed from the partition wall 5 and then transferred to the upper lid B to be supported. In the cap body A, the trace of the transition plug 10 removed from the partition wall 5 serves as a spout, and the content liquid in the container body D can be poured out.
Further, in this embodiment, the tip portion 11a of the bottom wall 11 on the front side has a sharp shape, so that stress is easily concentrated on the thin-walled weakened portion 8 on the front side.

By closing the upper lid B to the cap body A again after using the content liquid, a sealing portion is formed by the sealing cylinder 32 and the pouring cylinder 6 of the upper lid B, and the lid engaging portion 22 of the cap body A is formed. And the locking convex portion 41 and the engaging concave portion 42 of the upper lid B are fitted to each other, the inside of the hinge cap can be sealed again, and the upper lid B can be repeatedly opened and closed for use.

Further, in the present embodiment, the transition plug 10 can firmly hold the rear end portion 11b of the bottom wall 11 by engaging or abutting the outer periphery of the holding vertical wall 13 with the inner circumference of the holding receiving wall 33 of the upper lid B. Therefore, the spout is closed by the bottom wall 11, and the rear end portion 11b of the bottom wall 11 is unlikely to be deformed even if the container body D is laid on its side or the content liquid is shaken greatly in the case of dressing or the like. It becomes difficult for the content liquid to enter through the gap between the bottom wall 11 and the partition wall 5, and even if the content liquid enters through the gap between the bottom wall 11 and the partition wall 5, the content liquid flows into the transition plug 10 by the holding standing wall 13. Since it can be suppressed, even when the lid is opened again, it is possible to prevent the inside and outside of the container body D from being contaminated by the content liquid.

Further, in this embodiment, the holding receiving wall 33 of the upper lid B has a contact rib 34 formed in the center of the inner circumference of the hinge C side, and the contact rib 34 has the inner circumference of the holding receiving wall 33 of the transition plug 10. Since it is provided so as to be close to or in contact with the upper end of the holding standing wall 13 when engaging with or in contact with the outer periphery of the holding standing wall 13, even if the top wall 30 of the upper lid B is pushed in, the holding standing wall 13 and the holding receiving wall 13 are held and received. It is possible to prevent the engagement or contact with the wall 33 from being disengaged.
In this embodiment, the contact ribs 34 are provided only at one place on the holding receiving wall 33, but may be provided at a plurality of places.
Further, since the peripheral wall 19 of the transition plug 10 is provided around the outer periphery of the holding vertical wall 13, when the upper lid B is closed after opening, the transition plug 10 moves downward from that before opening. However, it does not impair the closure of the spout.

In the above embodiment, the hinge cap is attached to the container body D as a stopper, but it may be screwed with a screw.
Further, the thin wall weakening portion 8 has the same wall thickness as the hinge C side on the front side, but may be thinner than the hinge C side so that the front side can be easily broken.

Next, a second embodiment in which the cap body A and the upper lid B of the first embodiment are changed will be described.
Hereinafter, the same components as those in the first embodiment are designated by the same reference numerals, and only the different components are designated by different reference numerals, and the differences will be mainly described.

In FIG. 4, Aa is a cap body attached to the container body, and Ba is an upper lid that opens and closes by connecting the cap body Aa with a hinge C.
The cap body Aa is a partition wall 5 that closes the mouth portion of the container body, a dispensing cylinder 6 that is erected from the upper surface of the partition wall 5, and a mounting portion 7 that is mounted on the mouth portion and has a partition wall 5 formed inward. It is composed of and.

The partition wall 5 is provided with a transition plug 50 defined by a breakable thin-walled weakened portion 8 on the inner peripheral side of the pouring cylinder 6 in order to open the spout at the time of use.
The transition plug 50 includes a bottom wall 51 connected to the partition wall 5 via a thin-walled weakening portion 8, and the bottom wall 51 has a circular opening 52 formed on the front side and a thin-walled weakening portion on the back side. The holding wall 13 is erected from the upper surface along the inside of 8.

As shown in FIG. 4B, the opening 52 has an inner peripheral surface 54 that is vertical from the upper end to the lower end, and the upper portion of the opening 52 is smoothly chamfered from the upper surface of the bottom wall 51 to open. An inner edge 55 of the bottom wall of the bottom wall 51 is formed in the lower portion of the portion 52, and a bite recess 56 formed from the lower surface of the bottom wall 51 is provided in the lower outer portion of the opening 52.
The biting recess 56 is formed in an annular shape by further digging the inside of the enlarged diameter step portion 58 recessed from the lower surface of the bottom wall 51 at a predetermined depth, leaving the inner edge 55 of the bottom wall, and is formed into an annular shape. Similar to the first embodiment, a plurality of engaging protrusions 57 are formed on the side in the radial direction.

The upper lid Ba is rotatably attached to the upper end of the outer circumference of the outer cylinder 21 of the cap body Aa via the hinge C, and has a flat top wall 30 and a side peripheral wall 31 hanging from the peripheral edge of the top wall 30. And have.
The top wall 30 has a sealing cylinder 32 suspended from the lower surface and an engagement convex portion 60 on the front side inside the sealing cylinder 32.

As shown in FIG. 4B, the anchoring convex portion 60 includes a hem portion 61 having a columnar upper portion and a welding portion 62 having a lower diameter gently reduced downward. ..
The engagement convex portion 60 is fitted into the opening 52 of the transition plug 50 when the lid is closed, the welded portion 62 reaches a position beyond the lower end of the opening 52, and the welded portion 62 is melted. It is expanded and welded so as to fill the biting recess 56 and the enlarged diameter step portion 58 on the lower surface of the bottom wall 51, and the upper lid Ba and the transition plug 50 are firmly joined.
Further, the engagement convex portion 60 includes a regulation rib 63 projecting radially from the outer periphery of the hem portion 61, and the lower end surface of the regulation rib 63 comes into contact with or is close to the upper surface of the bottom wall 51 when the lid is closed. It has become like.

Next, the usage mode and the action and effect of this example will be described.
The hinge cap of this embodiment is obtained in an opened state by injection molding as in the first embodiment, and the upper lid Ba is rotated via the hinge C to be in the closed state shown in FIG. 4 (a). Be made.
At that time, since the engaging convex portion 60 of the upper lid Ba is reduced in diameter so as to be narrowed downward, it easily enters the inner peripheral surface 54 of the opening 52, and the welded portion 62 is from the lower end of the opening 52. The lower end surface of the regulation rib 63 projecting from the hem 61 abuts on or is close to the upper surface of the bottom wall 51, so that the engaging convex portion 60 enters the opening 52 too much. Can be regulated.

Next, in this embodiment, when the welded portion 62 is melted from under the anchoring convex portion 60 using a melting jig or the like in the closed state, the welded portion 62 is expanded and the bottom wall inner edge 55 side. It spreads outward from the bottom wall 51 and is welded so as to fill the bite recess 56 and the enlarged diameter step portion 58 formed on the lower surface of the bottom wall 51, and the upper lid Ba and the transition plug 50 of the cap body Aa are firmly joined.
Other usage modes and effects are the same as in the first embodiment.

Next, a third embodiment in which the cap body Aa of the second embodiment is modified will be described.
Hereinafter, the same components as those in the second embodiment are designated by the same reference numerals, and only the different components are designated by different reference numerals, and the differences will be mainly described.

In FIG. 5, Ab is a cap body attached to the container body, and Ba is an upper lid that opens and closes by connecting the cap body Ab with a hinge C.
The cap body Ab is a partition wall 5 that closes the mouth of the container body, a dispensing cylinder 6 that is erected from the upper surface of the partition wall 5, and a mounting portion 7 that is mounted on the mouth and has a partition wall 5 formed inward. It is composed of and.

The partition wall 5 is provided with a transition plug 70 defined by a breakable thin-walled weakened portion 8 on the inner peripheral side of the pouring cylinder 6 in order to open the spout at the time of use.
The transition plug 70 includes a bottom wall 71 connected to the partition wall 5 via a thin-walled weakening portion 8, and the bottom wall 71 has a circular opening 72 formed on the front side and a thin-walled weakening portion on the back side. The holding wall 13 is erected from the upper surface along the inside of 8.

As shown in FIG. 5B, the opening 72 is formed with an inner peripheral surface 74 that is vertical from the upper end to the lower end, and the upper portion of the opening 72 is smoothly chamfered from the upper surface of the bottom wall 71 to open. A cylindrical inner cylinder wall 75 is vertically hung from the lower surface of the bottom wall 71 at the lower portion of the portion 72.
On the lower surface of the bottom wall 71, a cylindrical outer cylinder wall 78 is vertically installed on the outer peripheral side of the inner cylinder wall 75, and between the outer cylinder wall 78 and the inner cylinder wall 75, the same depth as the lower surface of the bottom wall 71. A bite recess 76 formed by a cylinder is provided, and a plurality of engagement protrusions 77 are formed in the radial direction on the inner peripheral side of the bite recess 76.

The upper lid Ba is rotatably attached to the upper end of the outer circumference of the outer cylinder 21 of the cap body Ab via the hinge C, and has a flat top wall 30 and a side peripheral wall 31 hanging from the peripheral edge of the top wall 30. And have.
The top wall 30 has a sealing cylinder 32 suspended from the lower surface and an engagement convex portion 60 on the front side inside the sealing cylinder 32.

As shown in FIG. 5B, the anchoring convex portion 60 includes a hem portion 61 having a columnar upper portion and a welding portion 62 having a lower diameter gently reduced downward. ..
The engagement convex portion 60 is fitted into the opening 72 of the transition plug 70 when the lid is closed, the welded portion 62 reaches a position beyond the lower end of the opening 72, and the welded portion 62 is melted. It is expanded and welded so as to fill the biting recess 76 on the lower surface of the bottom wall 71 and the inner cylinder wall 75, and the upper lid Ba and the transition plug 70 are firmly joined.
Further, the engaging convex portion 60 includes a regulating rib 63 projecting radially from the outer periphery of the hem portion 61, and the lower end surface of the regulating rib 63 comes into contact with or is close to the upper surface of the bottom wall 71 when the lid is closed. It has become like.

Next, the usage mode and the action and effect of this example will be described.
The hinge cap of this embodiment is obtained in an opened state by injection molding as in the first embodiment, and the upper lid Ba is rotated via the hinge C to be in the closed state shown in FIG. 5 (a). Be made.
At that time, since the engaging convex portion 60 of the upper lid Ba is reduced in diameter so as to be narrowed downward, it easily enters the inner peripheral surface 74 of the opening 72, and the welded portion 62 is from the lower end of the opening 72. The lower end surface of the regulation rib 63 projecting from the hem 61 abuts on or is close to the upper surface of the bottom wall 71, so that the engaging convex portion 60 enters the opening 72 too much. Can be regulated.

Next, in this embodiment, when the welded portion 62 is melted from under the anchoring convex portion 60 using a melting jig or the like in the closed state, the welded portion 62 is expanded and the inner cylinder wall 75 side. It spreads outward from the outer cylinder wall 78 and is welded so as to fill the inner cylinder wall 75 and the biting recess 76 formed on the lower surface of the bottom wall 71, and the upper lid Ba and the transition plug 70 of the cap body Ab are firmly connected. Be joined.
Other usage modes and effects are the same as in the first embodiment.

The hinge cap of the present invention can improve the operability at the time of opening by firmly joining the upper lid and the transition plug when the upper lid is lifted at the time of opening, so that the content liquid requiring airtightness can be used. It can be widely applied as a hinge cap for storing containers.

A, Aa, Ab Cap body B, Ba Top lid C Hinge D Container body 1 Mouth 2 Engagement ridge 5 Partition 6 Injection cylinder 7 Mounting part 8 Thin-walled weakened part 10, 50, 70 Transition plug 11, 51, 71 Bottom Wall 11a Tip 11b Rear end 12, 52, 72 Opening 13 Holding standing wall 14, 54, 74 Inner peripheral surface 15 Guide wall 16, 56, 76 Biting recess 17, 57, 77 Engagement protrusion 18, 58 Expansion stage Part 18a Step part Inner edge 19 Circumferential wall 20 Inner cylinder 21 Outer cylinder 22 Lid engaging part 23 Swelling part 24 Engaging protrusion 25 Outer peripheral notch 26 Slit groove 30 Top wall 31 Side peripheral wall 32 Sealed cylinder 33 Holding receiving wall 34 Contact Ribs 35, 60 Engagement convex part 36, 61 Hem part 37 Guide part 38, 62 Welding part 38a Deformation welding part 39, 63 Restriction rib 40 Knob 41 Locking convex part 42 Engagement concave part 55 Bottom wall inner edge 75 Inner cylinder wall 78 Outer cylinder wall

Claims (5)

A hinge cap consisting of a cap body attached to the mouth of the container body and an upper lid connected to the cap body via a hinge.
The cap body consists of a partition wall that closes the mouth of the container body, a dispensing tube erected on the partition wall, a transition plug defined by a breakable thin-walled weakened portion on the partition wall inside the dispensing tube, and a transition plug. With an opening formed in,
The top lid comprises a top wall, a sealed cylinder that is hung from the bottom of the top wall and seals the pouring cylinder, and an anchoring protrusion that is hung from the bottom of the top wall inside the sealed cylinder.
The hinge cap is characterized in that the engaging convex portion of the upper lid is fitted into the opening of the transition plug when the lid is closed and then joined. The hinge cap according to claim 1, wherein the transition plug includes a bite recess formed on the outer lower surface of the opening. The hinge cap according to claim 1 or 2, wherein the anchoring convex portion is provided with a regulating rib that comes into contact with the transition plug on the outer periphery of the upper portion. The hinge cap according to any one of claims 1 to 3, wherein the transition plug includes a guide wall formed on the outer upper surface of the opening. The transition plug has a holding wall erected from the hinge side along the inside of the thin-walled weakened part.
The hinge cap according to any one of claims 1 to 4, wherein the upper lid is suspended from the lower surface of the top wall and includes a holding receiving wall that engages with or abuts on the holding standing wall.

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