JPH0248104Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention is a pore lip cap equipped with an inner plug member that is attached to the mouth of the container to form a spout, and is fitted to the mouth of the container. In particular, the present invention relates to a pressure block for a capping machine that can improve the sealing performance of a pour cap and easily break a connecting member.

"Prior Art" In general, a pore lip cap (hereinafter simply referred to as a cap) includes a metal cap shell consisting of a cylindrical tube part and a top plate part that closes the upper opening of the tube part. It consists of a synthetic resin inner plug member housed in a cap shell, and a liner interposed between this inner plug member and the top plate of the cap shell. A ring portion to be attached to the cap shell and a flange portion connected to the ring portion via a connecting member and fitted into the mouth portion of the container to which the cap shell is attached to serve as a spout are provided. are used. At the top of the flange of this cap, in order to make it easier to pour out the liquid stored in the container, there is an inclined surface that gradually straightens and gently rises inward in the radial direction of the flange. is formed.

Conventionally, in order to attach such a cap to the mouth of a container, a pressure block of a capping machine that can press the top of the cap from above has been used. This pressure block has a cylindrical shape for attaching the cap to the mouth of the container by pressing the inner periphery of the top plate of the cap shell from above, and has a flat bottom.

``The problem that the invention aims to solve'' However, in the case of conventional pressure blocks, the bottom of the block is a flat surface, so
The peripheral edge of the top plate of the cap shell cannot be deformed to correspond to the upper slope of the flange of the inner plug member, and a gap is therefore formed between the liner and the upper part of the flange of the inner plug member. This gap acts as a buffer layer, weakening the pressure on the ring part, and preventing downward displacement of the ring part, resulting in the problem that the connecting member cannot be cut reliably.

In addition, with this pressure block, when the cap is pressed, the liner and the upper part of the flange part of the inner plug member cannot be brought into close contact.
There were also problems with sealing performance, such as the inability to seal the mouth of the container.

``Means for Solving the Problems'' Therefore, this invention was developed by using a cylindrical top block (insert) that presses the inner periphery of the top plate of the cap shell from above to attach the pore cap to the mouth of the container; It consists of a cylindrical side block that is arranged around the top block and presses the periphery of the top plate of the cap shell to cut the connecting member of the inner plug member. In the past, the above-mentioned problems were solved by forming a tapered surface that decreased in diameter diagonally upward.

``Example'' Hereinafter, the pressure block of this invention will be explained in detail with reference to the drawings.

FIG. 2 shows a cap A suitable for being attached to the mouth of a container by the pressure block of this invention, and this cap A generally consists of a cap shell 1 and an inner plug member 2. It is. The cap shell 1 is made of metal such as aluminum, and consists of a cylindrical tube portion 1a and a top plate portion 1b that closes the upper opening of the tube portion 1a. A groove 1c is formed at the upper end portion of the cylindrical portion 1a, with a slight distance from the top plate portion 1b, and which protrudes inward in the radial direction of the cylindrical portion 1a along the circumferential direction. Further, a pilfer-proof band 1e is provided on the lower edge of the cylindrical portion 1a via a bridge 1d.

A liner 3 is provided on the inner surface of the top plate portion 1b of the cap shell 1. This liner 3 contacts the upper surface 5a of the flange portion 5 of the inner plug member 2, which will be described later, to seal the container opening.
The liner 3 is formed by pasting a liner material such as a vinyl chloride sheet or a polyethylene sheet, or by in-shell molding of polyethylene or the like.

An inner plug member 2 is housed in a cap shell 1 provided with a liner 3. Inner plug member 2
is molded by injection molding using a thermoplastic resin such as polyethylene or polypropylene, and consists of a fitting part 4, a flange part 5, a bridge part (connecting member) 6, and a ring part 7. It is what it is.

The fitting part 4 is a substantially cylindrical body, and is fitted into the mouth of the container to which the cap A is attached, thereby fixing the inner plug member 2 to the mouth of the container. The outer circumferential surface of the fitting portion 4 is provided with four protrusions 8 for preventing slipping off over the entire circumference. A portion of the fitting portion 4 below the protrusions 8 is slightly reduced in diameter, and a bottom portion 9 is formed below the reduced diameter portion. Further, a flange portion 5 is provided at the upper end edge of the fitting portion 4 and extends radially outward from the upper end edge. The outer diameter of the flange portion 5 is approximately equal to the outer diameter of the upper end of the container mouth, and is slightly smaller than the inner diameter of a ring portion 7, which will be described later. The upper surface 5a of this flange portion 5 is
As shown in FIG. 2, the fitting portion 4 first rises smoothly in a curved shape from the inner surface (curved surface portion 5b), then gradually straightens and gently downwards toward the outside in the radial direction (slanted surface portion 5c). It is formed. The angle of inclination of this inclined surface portion 5c is normally set to about 10 degrees with respect to the horizontal plane in consideration of ease of pouring out the liquid content. Further, a notch 5d is formed on the outer peripheral edge of the lower surface of the flange portion 5 to facilitate draining of the liquid when the liquid is poured out over the entire circumference.

A small piece-shaped bridge portion 6 is provided on the outer peripheral portion of the flange portion 5 in the radial direction outward of the flange portion 5.
...is provided. These bridge parts 6...
When installing the inner plug member 2 into the cap shell 1 and assembling the cap A, it was not cut and the cap A
It is cut by the pressure of the pressure block when it is attached to the mouth of the container. The above-mentioned flange portion 5 is attached to the outer peripheral portion of these bridge portions 6.
A ring portion 7 is continuously provided that stands up along the axial direction. This ring portion 7 is located between the groove 1c of the cap shell 1 and the liner 3.
An annular member inscribed in the cylindrical portion 1a, the outer diameter of which is set approximately equal to the inscribed portion of the cylindrical portion 1a, and the inner diameter set slightly larger than the outer diameter of the flange portion 5. .

The inner plug member 2 formed in this manner has the ring portion 7 fitted between the groove 1c of the cap shell 1 and the liner 3.
It is housed in Capsiel 1 so that it does not fall out,
The inner plug member 2 and the cap shell 1 constitute a cap A.

In order to attach the cap A constructed as described above to the mouth of the container, it is preferable to use a pressure block as shown in FIG.

FIG. 1 shows an example of the pressure block of this invention, and the reference numeral 10 in the figure is the pressure block. This pressure block 10 is a metal member that constitutes a part of a capping machine (not shown) and is used to attach the cap A to the container opening by directly pressing the upper part of the cap A. Block 11 and top block 1
It consists of 2.

The side block 11 is a cylindrical member whose longitudinal direction is vertical and which is disposed on a turret of a capping machine (not shown) so as to be movable in the vertical direction. be. At the bottom of this side block 11,
An inner circumferential surface portion 13 is formed slightly inward from the peripheral edge portion and rises from here upward in the axial direction of the side block 11 (in the direction opposite to the arrow S direction in FIG. 1) over the entire circumference, and the upper portion of this inner circumferential surface portion 13 is formed. for,
A step portion 14 is formed which is connected to the inner circumferential surface portion 13, extends radially inward of the side block 11, and rises smoothly upward in the axial direction of the side block 11. A cylindrical top block storage recess 15 is formed, which includes a peripheral portion 15a having the same diameter and coaxiality as the upper portion of the step portion 14, and an upper surface portion 15b perpendicular to the axial direction of the side block 11. A cylindrical recess 16 is formed in the center of the upper surface 15b of the top block storage recess 15.
A cylindrical hole 17 is formed in the center of the upper surface of 6. Further, on the outer periphery near the bottom of the side block 11, a top block storage recess 1 is formed from the outer periphery.
5, a guide hole 18 is formed which communicates in the horizontal direction. This guide hole 18 accommodates a pin 19 that is horizontally driven into the top block 12 to prevent the top block 12 from falling out of the top block storage recess 15.
Here, the inner circumferential surface portion 1 of the above-mentioned side block 11 is
The inner diameter of the cap shell 1 is approximately equal to or slightly smaller than the outer diameter of the top plate portion 1b of the cap shell 1, and the inner diameter of the upper part of the stepped portion 14 and the circumferential portion 15a of the top block storage recess 15 are set to be approximately equal to or slightly smaller than the outer diameter of the top plate 1b of the cap shell 1. The size is set to be between the outer diameter of the top plate portion 1b and the outer diameter of the flange portion 5 of the inner plug member 2.

The top block 12 is housed inside the top block housing recess 15 of the side block 11. This top block 12 is a cylindrical member for firmly attaching the cap A to the container mouth by directly pressing the upper part of the cap A placed over the container mouth.
The axial dimension of is set shorter than the axial depth dimension of the top block storage recess 15,
And the difference in size is such that when the pressure block 10 attaches the cap A to the container mouth,
It is set to be equal to or larger than the downward displacement of the ring portion 7 necessary for cutting the bridge portions 6 provided on the inner plug member 2. A tapered surface 20 is formed at the bottom of the top block 12, the diameter of which decreases obliquely upward toward the axial center of the top block 12.
The angle of inclination of this tapered surface 20 with respect to the horizontal plane is
It is determined to correspond to the inclination angle of the inclined surface portion 5c formed on the upper surface 5a of the flange portion 5 of the inner plug member 2 with respect to the horizontal plane, and is in the range of about 8 to 12 degrees, preferably 10 degrees. . When the tapered surface 20 has an inclination angle of less than 8 degrees with respect to the horizontal plane, when the top block 12 presses the cap shell 1 placed over the container opening from above, the top plate portion 1b of the cap shell 1 is pressed against the inner plug member 2. It is not possible to deform the flange portion 5 in accordance with the sloped surface portion 5c of the flange portion 5 and bring them into close contact with each other, resulting in a gap between the top plate portion 1b and the sloped surface portion 5c.
This causes problems such as a reduction in the sealing performance of the cap A with respect to the opening of the container. If the angle exceeds 12 degrees, the tapered surface 19b of the concave portion 19 of the top block 12 will press only the peripheral edge of the top plate portion 1b of the cap shell 1, and the entire top plate portion 1b may not be pressed. This may cause inconveniences such as deformation.

At the center of the upper surface of the top block 12 is a shaft 2.
1 is fixed, and a coil spring 22 wound around a shaft 21 is disposed between the upper surface of the top block 12 and the upper surface of the recess 16 of the side block 11. This coil spring 22 is connected to the top block 12.
This is for urging the top block 12 in the direction of arrow S in FIG. 3 to bring the bottom of the top block 12 into contact with the top of the cap A. The bottom of the top block 12, which is biased in the S direction by the coil spring 22, is located below the stepped portion 14 of the side block 11.

Next, a method of attaching the cap A using the pressure block having the above structure will be explained. First, the liner 3 is provided on the top plate portion 1b of the cap shell 1, and then the liner 3 is provided on the top plate portion 1b of the cap shell 1.
Assemble the cap A by fitting the inner plug member 2 into the inside of the cap. At this time, the ring portion 7 side of the inner plug member 2 is directed toward the top plate portion 1b of the cap shell 1, and the inner plug member 2 is pushed in until the ring portion 7 is fitted between the groove 1c and the liner 3.

Cap A assembled in this way is
For example, in the manufacturing process of a bottled product, after a cap feed device (not shown) is used to cover the opening 23 of a container such as a bottle to be capped, the pressure block 10 of a capping machine is installed adjacent to the cap feed device. is pressed against the container opening 23 by. At this time, the pressure block 10 descends and approaches the upper side of the cap A, as shown in FIG.
At almost the same time as the tapered surface 20 at the bottom of the cap shell 1 is brought into contact with the top plate part 1b of the cap shell 1, the step part 14 of the side block 11 is brought into contact with the peripheral edge of the top plate part 1b of the cap shell 1. Since the bottom of the top block 12 is in contact with the top plate 1b of the cap shell 1, the bottom of the top block 12 is pushed up against the biasing force of the coil spring 22 as the pressure block 10 descends, and the final The upper surface of this top block 12 is the upper surface 1 of the top block storage recess 15 of the side block 11.
It is pushed up until it comes into contact with 5b. Further, the side block 11 is press-fitted into the peripheral portion of the top plate portion 1b of the cap shell 1 after the bottom portion of the top block 12 is above the horizontal position of the stepped portion 14. By press-fitting the side block 11, the ring part 7 inside the cap shell 1 is reliably displaced downward through the cap shell 1, and the bridge part 6 connecting the ring part 7 and the flange part 5...
is relatively moved upward and cut by the downward displacement of the ring portion 7, and the upper surface portion 5a of the flange portion 5 comes into contact with the liner 3. Then, almost at the same time as the pressure block 10 finishes pressing the cap A against the container mouth 23, a thread is rolled in the cylindrical portion 1a of the cap A by the thread cutting roll 24 and attached to the container mouth 23. Cap A is tightly wound. In the case of the cap A attached to the container opening 23 in this way, the cap shell 1
The top plate portion 1b of the liner 3 and the upper surface 5 of the flange portion 5 are deformed corresponding to the inclined surface portion 5c of the flange portion 5.
Since they are in close contact with each other, the container opening 23 is completely sealed.

Next, when the cap A is removed in order to pour out the contents from the container, the fitting part 4 and flange part 5 of the inner plug member 2 are inserted into the container mouth part 23, as shown in FIG.
The cap shell 1 is removed together with the ring portion 7 remaining inside the cap shell 1.

By using such a pressure block 10, the tapered surface 20 is provided at the bottom of the top block 12, so that the top block 12
When the upper part of the cap A is pressed using the tapered surface 20, the top plate part 1b of the cap shell 1 is deformed in accordance with the inclined surface part 5c of the flange part 5, and the cap A is securely fitted into the container mouth part 23. The liner 3 and the flange part 5 can be
Since it is possible to bring the ring part 7 into close contact with the inclined surface part 5c of the side block 11, the ring part 7 can be displaced in the S direction by the step part 14 of the side block 11, and the bridge part 6 can be reliably cut. Further, according to this pressure block 10, the liner 3 and the inclined surface portion 5c of the flange portion 5 can be brought into close contact with each other, so that the sealing performance of the cap A can be improved. Furthermore, this pressure block 1
According to No. 0, since the bridge portions 6 can be reliably cut, the strength of the bridge portions 6 can be increased, such as by making each bridge portion 6 thicker. If the strength of the bridge portions 6 can be increased, the bridge portions 6 can be prevented from being cut when the inner plug member 2 is installed in the cap shell 1.

``Effect of the invention'' As explained above, the pressure block of this invention has a tapered surface that reduces in diameter obliquely upward toward the axial center of the top block. When pressed against the top of the cap, the top plate of the cap shell is deformed in accordance with the sloped surface of the flange of the inner stopper member, allowing the cap to be reliably fitted into the container opening, and also allowing the liner and the flange to be reliably fitted. Since the sloped surface portion of the side block can be brought into close contact with the ring portion, the ring portion can be reliably displaced by the stepped portion of the side block, and the connecting member can be cut.

Further, according to this pressure block, since the liner and the inclined surface portion of the flange portion can be brought into close contact with each other, the sealing performance of the cap can be improved.

Furthermore, according to this pressure block, since the connecting member can be cut reliably, it is possible to use a connecting member with increased strength, such as by making the connecting member thicker. If the strength of the connecting member can be increased, a secondary effect can be obtained such that the connecting member can be prevented from being cut when the inner plug member is installed in the cap shell.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view showing an example of the pressure block of this invention, and Fig. 2 is a partial sectional view showing an example of a cap suitably used as an object to which the pressure block of this invention is attached. FIG. 3 is a partially cross-sectional schematic diagram showing the state in which the cap is attached to the mouth of the container using the pressure block of this invention, and FIG. 4 is the state in which the cap is opened. FIG. A...Cap (pore lip cap), 1...
... Cap shell, 2 ... Inner plug member, 3 ... Liner, 6 ... Bridge part (connection member), 7 ... Ring part, 10 ... Pressure block, 11 ...
Side block (pressure block), 12...
…Top block (pressure block), 20
... Tapered surface, 23 ... Container mouth.

Claims (1)

[Claims for Utility Model Registration] A metal cap consisting of a cylindrical tube portion and a top plate portion that closes the upper opening of the tube portion, an inner plug member made of synthetic resin housed within the cap shell, The inner plug member includes a liner interposed between the inner plug member and the top plate portion of the cap shell, and the inner plug member has a ring portion for installing the inner plug member into the cap shell, and an inclined surface on the upper part. A pressure block for fitting a pore lip cap having a flange portion connected to the container mouth portion through a connecting member, the pressure block being configured to press the inner periphery of the top plate portion of the cap shell from above. A cylindrical top block for attaching the above-mentioned pour cap to the opening of the container, and a cylindrical top block disposed around the top block for pressing the peripheral edge of the top plate of the cap to cut the connecting member of the inner stopper member. A pressure block comprising: a side block; the bottom of the top block is formed with a tapered surface that decreases in diameter diagonally upward toward the axial center of the top block.