JP4174717B2 - Cap unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cap unit attached to a can mouth such as a petroleum can or a paint can, and is particularly suitable for a cap unit in which a synthetic resin packing is accommodated in a cap with an elastic stopper piece.
[0002]
[Prior art]
As a conventional cap unit, as shown in Japanese Utility Model Laid-Open No. 61-69056, a cap with a metal elastic locking piece having an upper wall that can be freely moved and a side wall formed by a large number of elastic locking pieces. Some include a synthetic resin packing in which a packing body, a peripheral edge portion, and a packing collar portion are integrally formed by injection molding.
[0003]
When the cap unit is capped, the lower end of the elastic anchoring piece of the cap with the elastic anchoring piece is placed in direct contact with the upper end arc portion of the can mouth, and the upper surface of the cap unit is pressed to be elastic. After the lower end of the stopper piece is lowered while spreading along the upper end arc part of the can mouth, the lower end of the elastic stopper piece enters the side wall recess of the can mouth and is locked.
[0004]
[Problems to be solved by the invention]
However, according to such a conventional cap unit, the lower end of the elastic hooking piece of the cap with the elastic hooking piece is placed in direct contact with the upper end arc portion of the can mouth at the time of capping. For this reason, when the center of the can mouth and the center of the cap unit are placed largely deviated from each other, the lower end of the elastic stopper piece is brought into contact with a portion where the inclination angle of the upper end arc portion of the can mouth is gentle. As a result, the force pressed from the upper surface of the cap unit acts as a force for bending the elastic tacking piece, which may cause a claw breaking phenomenon of the elastic tacking piece. In addition, the conventional cap unit has a risk of damaging the surface of the can mouth or the finger with the sharp lower end of the metal elastic locking piece.
[0005]
An object of the present invention is to provide a cap unit that can prevent a can mouth, a finger, and the like from being damaged by the lower end of an elastic tacking piece.
[0006]
Another object of the present invention is to provide a cap unit that can prevent the claw breakage of the elastic tacking piece when capping to the can mouth, and can prevent the can mouth and fingers from being damaged by the lower end of the elastic tacking piece. There is to do.
[0007]
[Means for Solving the Problems]
To achieve the above object, the present invention includes a metal elastic鉤止piece with the cap having a side wall formed on the wall and a number of elastic鉤止piece retractable, the packing and the body by injection molding In a cap unit that accommodates a synthetic resin packing integrally formed with a peripheral part for can mouth contact extending outward from the outer periphery of the packing body and a packing collar part extending outward from the outer periphery of the peripheral part , A packing guide portion extending downward from the packing collar and locked to the lower end of the elastic anchoring piece is provided . The packing guide includes a hanging portion extending downward from the packing collar and a lower end of the hanging portion. An outward portion extending outward from the outer portion and a rising portion extending upward from the outer portion, and the hanging portion, the outer portion, and the rising portion cover the lower end of the elastic locking piece. Stop The in the configuration and the thing.
[0008]
In order to achieve the another object, the present invention provides a packing body by injection molding in a cap with a metal elastic locking piece having a freely movable upper and lower wall and a side wall formed of a large number of elastic locking pieces. And a cap unit that contains a synthetic resin packing integrally formed with a peripheral part for can mouth contact extending outward from the outer periphery of the packing body and a packing collar part extending outward from the outer periphery of the peripheral part . A packing guide part extending downward from the packing hook part and locked to a lower end of the elastic hooking piece, the packing guide part including a hanging part extending downward from the packing hook part, An outer portion extending outward from the lower end, and a rising portion extending upward from the outer portion, so that the lower end of the elastic anchoring piece is covered by the hanging portion, the outer portion, and the rising portion Person in charge It is, in that a structure in which the lower surface of the outer portion formed on the inclined surface lowered downward.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
[0010]
The cap unit 1 is configured by housing a synthetic resin packing 10 in a cap 40 with a metal elastic tacking piece such as a tin plate. In this embodiment, the elastic tacking piece cap 40 is further accommodated in the sealing member 20, and the cap unit 1 is constituted by the elastic tacking piece cap 40, the packing 10 and the sealing member 20. The cap unit 1 is used so as to be attached to the can mouth 30 and to keep the inside of the can airtight.
[0011]
A can mouth 30 forming a part of a 4 liter can or an 18 liter can has an upper end arc portion 31 that forms an inlet / outlet for contents and a side wall recess 32 that locks the lower end of the elastic tacking piece 42. Configured.
[0012]
The metal cap 40 with elastic retaining pieces is configured to include an upper wall 41 that can be moved in and out and an elastic retaining piece 42 that can be opened and closed.
[0013]
As shown in FIGS. 1 to 3, the synthetic resin packing 10 such as polyethylene having elasticity has a structure in which a packing main body 11, a peripheral edge portion 12, a packing collar portion 13 and a packing guide portion 14 are integrally manufactured by injection molding. Has been.
[0014]
As shown in FIG. 4 in an enlarged manner, the packing body 11 is configured by forming a ring-shaped protruding portion 11b at the center of the flat portion 11a. The ring-shaped projecting portion 11b supplements the strength of the thin flat portion 11b and has sufficient strength as the packing body 11. In particular, since the ring-shaped protruding portion 11b protrudes with substantially the same thickness as the flat portion 11a, the material cost can be reduced as compared with the case where only the upper surface protrudes and the pressure in the can increases. Thus, the outer inclined portion of the ring-shaped protruding portion 11b acts to push the outer peripheral portion of the flat portion 11a outward. By this flat portion 11a pushed outward, the conical expansion portion 12a is strongly pushed by the can mouth 30, and has a function of enhancing the airtight function against an increase in can internal pressure.
[0015]
As shown in FIG. 5 in an enlarged manner, the peripheral portion 12 includes a conical widening portion 12a, an inner protruding ridge portion 12b, an outer protruding ridge portion 12c, a thick portion 12d, and an outer standing portion 12e. Has been.
[0016]
The conical expanded portion 12a continuously extends from the outermost peripheral portion of the flat portion 11b to the upper outer side over the entire circumference, and is in contact with the can mouth 30 in the mounted state. That is, the outer surface of the conical expanded portion 12 a is in contact with the upper end arc portion 31 of the can mouth 30 obliquely.
[0017]
The inner protruding peak portion 12b is formed continuously from the upper end portion of the conical expansion portion 12a, and is formed so as to protrude upward over the entire circumference. The inner protruding ridge portion 12b is not in contact with the upper wall 41 of the elastic locking piece cap 40 in a normal mounting state, and a strong force is applied from above the elastic locking piece cap 40 to form the elastic locking piece. When the cap 40 sinks, the action of contacting the upper wall 41 and sinking is mitigated.
[0018]
The outer protruding ridge 12c is continuously formed outward from the outer peripheral side surface of the inner protruding ridge 12b, and is formed to protrude upward over the entire periphery. The outer protruding peak 12c is brought into contact with the upper wall 41 of the elastic locking piece cap 40 in the mounted state.
[0019]
The thick portion 12d is formed continuously from the lower surface of the outer protruding ridge portion 12b and the lower surface of the outer protruding ridge portion 12c, and forms a thick portion extending downward over the entire circumference. The thick portion 12d has a gap with the conical widening portion 12a, and is not in contact with the upper end arc portion 31 of the can mouth 30 in a normal mounting state. When a strong impact force is applied, it can contact the upper end arc portion 31 and receive the impact force, thereby keeping the airtightness.
[0020]
The outer standing part 12e is formed continuously outward from the lower surface of the outer peripheral part of the thick part 12d, and comes into contact with the upper arc part 31 of the can mouth 30 in the mounted state. The conical expanded portion 12a and the outer vertical portion 12e are opposed to the upper end arc portion 31 in an inverted V shape, and are in contact with each other at two locations inside and outside the upper end arc portion 31 so as to maintain airtightness. . Further, the outer projecting mountain portion 12 c and the outer standing lower portion 12 e are in contact with the upper wall 41 and the upper end arc portion 31 so as to keep the airtightness between the upper wall 41 and the upper end arc portion 31.
[0021]
The packing collar portion 13 is formed to continuously extend from the outer peripheral side surface of the thick portion 12d of the peripheral edge portion 12 in an arc shape outward and downward. The outer diameter of the packing collar 13 is set to be slightly larger than the maximum inner diameter in a state where the elastic retaining piece 42 is expanded. As shown in FIG. 1, the packing collar 13 is deformed inward in the mounted state, and acts to push the thick portion 12d inward. As a result, the thick portion 12d having a gap with the conical expanded portion 12a is deformed inward and presses the outer standing portion 12e inward so as to maintain airtightness with the upper arc portion 31. Function.
[0022]
The packing guide portion 14 extends downward from the packing collar 13 and is locked to the lower end of the elastic tacking piece 42. Thereby, it is possible to prevent the can mouth 30 or the finger from being damaged by the lower end of the elastic tacking piece 42. As shown in FIG. 6 in an enlarged manner, the packing guide portion 14 includes a hanging portion 14a extending downward from the packing collar portion 13, an outer portion 14b extending outward from the lower end of the hanging portion 14a, and an outer portion 14b. And a rising portion 14c extending upward. The packing 10 is attached to the elastic hooking piece cap 40 so as to cover the lower end of the elastic hooking piece 42 by the hanging part 14a, the outer part 14b, and the rising part 14c. Thereby, it is possible to more reliably prevent the packing guide portion 14 from being securely locked to the elastic tacking piece 42 and damaging the can mouth 30 or the finger by the lower end of the elastic tacking piece 42.
[0023]
The hanging portion 14 a is formed so as to be gradually thinner than the thickness of the packing collar portion 13. As a result, the drooping portion 14a is deformed so as to be surely along the inner surface of the elastic locking piece 42 as shown in FIG. 1, and at the time of mounting, the elastic locking piece 42 and the side wall recess 32 are separated as shown in FIG. The packing 10 according to the present embodiment can be applied without changing the shape, size, and the like of the upper wall 41 and the can mouth 30 that are widely used at present.
[0024]
The outer portion 14b has a lower inclined surface formed on the lower surface. When the outer portion 14b is attached to the upper arc portion 31 of the can mouth 30, the lower surface portion is inclined and contacted as shown in FIG. Thus, the function of guiding the packing guide portion 14 (in other words, the elastic locking piece 42) along the arc surface of the upper end arc portion 31 is exhibited. This guide function and the elasticity of the packing guide portion 14 itself can prevent the elastic tacking piece 42 from breaking. The inclined surface of the outer portion 14b may be formed in an arc shape.
[0025]
The rising portion 14c is locked to the outer surface of the lower end of the elastic tacking piece 42, and functions to prevent the packing guide portion 14 from coming off the elastic tacking piece 42. The outer portion 14b and the rising portion 14c are set to have a thickness and dimensions so that the mounting of the sealing member 20 is not hindered.
[0026]
In addition, the packing guide portion 14 is formed with a large number of grooves 14d over the entire circumference. With this groove 14 d, the packing guide portion 14 can be easily attached to the lower end of the elastic locking piece 42. The intervals between the grooves 14d are formed larger than the intervals between the gaps forming the elastic locking pieces 42. As a result, the lower end of the elastic locking piece 42 can be reliably covered and protected.
[0027]
In the packing 10, the packing body 11, the peripheral edge portion 12, the packing collar portion 13, and the hanging portion 14 a of the packing guide portion 14 are accommodated in the elastic tacking piece cap 40, and the outer portion 14 b and the rising portion of the packing guide portion 14. The elastic claw piece cap 40 and the cap unit are formed so that 14 c is exposed to the outside of the elastic claw piece cap 40.
[0028]
The synthetic resin sealing member 20 is manufactured by injection molding using a material having elasticity such as polyethylene, and an annular upper wall 21 and a cylindrical side wall 22 are integrally formed.
[0029]
The upper wall 11 of the sealing member 20 has a circular space 21a at the center, and a ring-shaped knob 21b is formed along the circular space 21a. The side wall 22 of the sealing member 20 includes a side wall main body portion 22a and a convex portion 22b. The side wall main body portion 22a extends from the upper wall 21 so as to fall substantially vertically, and the convex portion 22b is formed at the inner peripheral lower end portion of the side wall main body portion 22a.
[0030]
Next, a method for manufacturing the cap unit 1 and a method for capping the cap unit 1 into the can mouth 30 will be described.
[0031]
First, the packing 10 is inserted into the cap 40 with the elastic locking piece in the expanded state, and the cap 40 with the elastic locking piece is closed. The closed cap 40 with the elastic locking piece is inserted into the sealing member 20 using the elasticity of the convex portion 22b to form the cap unit 1 shown in FIG. Thus, the cap unit 1 is formed in order to facilitate the transportation and supply operation to the can mouth.
[0032]
After filling the can with contents such as oil or paint, the cap unit 1 is automatically supplied up to the top of the can mouth 30 by the cap unit supply device. At this time, since the packing guide portion 12d is formed with a thin wall, the cap unit 1 can be automatically supplied without substantially changing the existing cap unit supply device.
[0033]
Next, the cap unit 1 is lowered by the capping device and placed on the can mouth 30. At this time, it is desirable to place the center of the can mouth 30 and the center of the cap unit 1 as closely as possible. However, as shown in FIG. 1, the center axis of the placed cap unit 1 and the can The center axis of the upper end arc portion 31 of the mouth 30 may be greatly deviated.
[0034]
Further, the capping device is lowered, and the cap unit 1 is lowered by pressing the upper surface of the cap unit 1 (specifically, the upper surface of the upper wall 11 of the sealing member 20). At this time, since the packing guide portion 14 operates so as to contact the upper end arc portion 31 and have a guide function, the cap unit 1 can be lowered smoothly. When the cap unit 1 is further lowered, the lower end of the elastic retaining piece 42 is lowered while being expanded along the inclined surface of the upper end arc portion 31 to the upper end arc portion 31 via the packing guide portion 14, and is moved to the side wall recess 32. The capping is completed by being locked. Thus, since the elastic tacking piece 42 is mounted without capping the upper end arc portion 31 directly at the time of capping, the can mouth 30 is not damaged at the lower end of the elastic tacking piece 42.
[0035]
At the time of this capping, even when the center of the can mouth 30 and the center of the cap unit 1 are greatly eccentric as shown in FIG. 1, the lower end of the outer portion 14b abuts the can mouth 30 and the eccentric dimension becomes small. To guide you. Thereby, it can prevent that the latching | locking part 42b of the elastic locking piece 42 bends inside.
[0036]
【The invention's effect】
As is apparent from the description of the above embodiments, according to the present invention, it is possible to provide a cap unit that can prevent a can mouth, a finger, and the like from being damaged by the lower end of the elastic tacking piece.
[0037]
In addition, according to the present invention, a cap unit that can prevent the claw breakage of the elastic tacking piece when capping to the can mouth and prevent the can mouth and fingers from being damaged by the lower end of the elastic tacking piece is provided. can do.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a state in the middle of mounting a cap unit to a can mouth showing an embodiment of the present invention.
2A and 2B are diagrams showing packings used in the cap unit shown in FIG. 1, wherein FIG. 2A is a plan view, FIG. 2B is a front view, and FIG. 2C is a bottom view.
3 is a cross-sectional view taken along the line AA in FIG.
4 is an enlarged view of a portion B in FIG. 3;
FIG. 5 is an enlarged view of part C in FIG. 3;
6 is an enlarged view of a part D in FIG. 3;
7 is a longitudinal sectional view showing a state in which the cap unit of FIG. 1 is attached to a can mouth. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Cap unit, 10 ... Packing, 11 ... Packing main body, 11a ... Flat part, 11b ... Ring-shaped protrusion part, 12 ... Peripheral part, 12a ... Conical expansion part, 12b ... Inner protrusion peak part, 12c ... Outer protrusion Ridge 12b ... thick part 12e ... outer standing part 13 ... packing collar part 14 ... packing guide part 14a ... drooping part 14b ... outer part 14c ... rising part 20 ... sealing member, DESCRIPTION OF SYMBOLS 21 ... Upper wall, 22 ... Side wall, 30 ... Can mouth, 31 ... Upper end circular arc part, 32 ... Side wall recessed part, 40 ... Cap with elastic tacking piece, 41 ... Upper wall, 42 ... Elastic tacking piece

Claims (4)

In a cap with a metal elastic stopper piece having a top and bottom wall and a side wall formed of a large number of elastic stopper pieces, a can body that extends outward from the outer periphery of the packing body and the packing body by injection molding In the cap unit that accommodates the synthetic resin packing integrally formed with the peripheral edge part for contact and the packing collar part extending outward from the outer periphery of the peripheral edge part ,
A packing guide portion extending downward from the packing collar portion and locked to a lower end of the elastic retaining piece ;
The packing guide portion includes a hanging portion extending downward from the packing collar portion, an outer portion extending outward from a lower end of the hanging portion, and a rising portion extending upward from the outer portion, and the hanging portion A cap unit, which is locked by a portion, the outer portion, and the rising portion so as to cover a lower end of the elastic locking piece . A can mouthpiece extending outward from the outer periphery of the packing body and the packing body by injection molding in a cap with a metal elastic fastening piece having a top and bottom wall and a side wall formed by a number of elastic fastening pieces. In a cap unit that accommodates a synthetic resin packing in which a contact peripheral edge and a packing collar extending outward from the outer periphery of the peripheral edge are integrally formed,
A packing guide portion is provided that extends downward from the packing collar portion and is engaged with a lower end of the elastic retaining piece,
The packing guide portion includes a hanging portion extending downward from the packing collar portion, an outer portion extending outward from a lower end of the hanging portion, and a rising portion extending upward from the outer portion, A cap that is locked by the outer portion, the outer portion, and the rising portion so as to cover the lower end of the elastic locking piece, and that the lower surface portion of the outer portion is formed on an inclined surface that is lowered downward. unit.   3. The cap unit according to claim 1, wherein a plurality of grooves are formed in the packing guide portion so as to open to a lower end over the entire circumference.   4. The cap unit according to claim 3, wherein a gap between the grooves formed in the packing guide portion is larger than a gap between the gaps forming the elastic locking pieces.

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