JPH0218650B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a metal lid fitting in which a metal lid that is fitted onto a container opening provided on a top plate of a container is fixed by extending the metal lid to the lower side of the container mouth rim by expanding the diameter of the metal lid peripheral wall. The invention relates to a mounting device.

As a technique for sealing the container mouth with a metal lid, the metal lid has a peripheral wall portion that is higher than the height of the container mouth wall and a folded portion that overlaps the container mouth wall, and the peripheral wall portion is fitted to the container mouth. It is well known that there is a technique that expands the diameter of the lower part of the peripheral wall by pressing it over almost the entire circumference when the container is in a closed state so that it bulges out to the side under the top plate of the container to prevent it from coming out. .

The apparatus for fitting a metal lid to a container opening as described above includes a plurality of mold pieces 1 arranged in an annular arrangement, as shown in FIGS. 1 and 2 in longitudinal cross-sectional side views. (only one piece is shown) is generally operated by a cam disc 2. in this case,
The metal lid 4 that fits into the container mouth 3 has a peripheral wall part 6 that is higher than the container mouth wall 5, and an outward folded part 8 that overlaps the folded part 7 that is folded back to the outside of the container mouth 3. A packing material 9 is applied to the back side of 8.

In order to fit such a metal lid 4 into the container mouth 3, first, as shown in FIG. After inserting the entire pressing die piece into the inner side of the peripheral wall 6, the cam disc 2 is raised to press out the pressurizing surface 1a of the entire pressing die piece 1 outward, and the lower part of the peripheral wall 6 is inserted into the opening wall 5. bulges downward and laterally. Thereafter, by placing the cam disk 2 in the lowered position again, the press mold pieces 1 are assembled by the tightening force of the annular spring 10 and pulled upward.

As shown in FIG. 1, the conventional device for fitting the metal lid 4 to the container opening 3 as described above supports the mold piece 1 constituting the split mold in an almost upright state, and presses the mold piece 1 formed at the upper end. The fitting portion 1b that opens outward is connected to the protruding portion 1c.
The fulcrum portion is located approximately vertically above the pressing surface 1a of the mold piece 1, and the point of action 1d of the cam disk 2 is the fulcrum portion of the protrusion 1c. Since the distance m in the horizontal direction between the fulcrum and the point of action in the vertical plane was almost vertically downward, the lever ratio of the pressing piece that acted as a screw could not be increased, and a large force was required during machining. It cost.

That is, in the structure for operating the press mold piece shown in FIGS. 1 and 2, the distance between the pressing surface 1a and the protrusion 1c serving as a fulcrum is _l1 , and the distance between the point of application 1d and the protrusion 1c is l. ₂ , and the acting force generated on the pressure surface 1a is
When F ₁ is the acting force applied to the acting force 1d applied to the point of action 1d and F ₂ is the acting force added to the acting force 1d, F ₁ ×l ₁ =F ₂ ×l ₂ and F ₁ =F ₂ ×l ₂ /l ₁ .

In this case, since l ₁ is approximately equal to or slightly larger than l ₂ , F ₁ =F ₂ or F ₁ is slightly smaller than F ₂ .

Therefore, if you want to obtain F ₁ , which is the force for expanding the diameter, that is, the clinch force, you will need F ₂ as a force equal to F ₁ , or F ₂ that is greater than F ₁ . The power was very great.

Based on the above-mentioned viewpoint, the present invention is based on the patent No.
As an additional invention of No. 108361 (see Japanese Patent Publication No. 56-27333), which has the same purpose as the invention, it provides a metal lid fitting device that can reliably expand the diameter of the metal lid peripheral wall with a small force using a large lever ratio. Then, the pressing piece that makes up the split mold is horizontally supported by providing a circular protrusion that serves as a fulcrum just above the pressure surface for diameter expansion formed at the bottom of the outer end, and this pressing piece is placed in the center of the main body of the device. It is designed to be driven by an elevating member provided nearby.

Next, an embodiment of the apparatus of the present invention will be described with reference to the drawings. The right half of FIG. 3 shows a state in which machining is ready for start, and the left half of the same figure shows a state when machining is completed. As shown in the longitudinal section,
In the present device, the pressing mold pieces 11 constituting the split mold are horizontally supported levers arranged in a horizontal annular arrangement.
A circular protrusion 12 serving as a fulcrum is provided.

The pressing piece 11 is supported by the apparatus main body 13 so that the pressing surface 11a can be moved from the processing standby position to the processing completion position by moving the inner end up and down around the circular protrusion 12.

The device body 13 has a metal lid 4 stacked on the mouth wall of the container.
It has an annular notch 14 of a size and shape that can tightly press the folded part 8 of the die, and an annular groove 15 for supporting the circular protrusion 12 of the pressing mold piece 11 is provided directly above this notch. be.

An annular metal 16 is fitted into the annular groove 15. This methyl 16 is connected to the circular protrusion 12 of the mold piece 11.
Determine the height and depth of the groove in which to insert the mold piece 1.
This member is replaceable so that it can correctly support the circular protrusion 12 of 1.

The metal 16 has a boss 16A and a flange 16B.
The boss 16A has an outer diameter determined so that the semicircular guide protrusion 17 provided on the back side of the circular protrusion 12 of the mold piece 11 comes into contact with the boss 16A. The circular protrusion 12 can be brought into close contact.

A semicircular protrusion 18 is provided at the upper part of the inner end of the mold piece 11.
In addition, cutout steps 19 are provided at the lower inner end, and these semicircular protrusions 18 and cutout steps 19 are
Pneumatic lifting member 2 provided in the center of the device body 13
It is multiplied by 0.

The semicircular protrusion 18 comes into contact with an annular metal 23 that is fitted into the downward annular groove 21 of the pneumatic lifting member 20 and fixed with a required number of screws 22, and the inner circumferential surface 20a of the peripheral wall of the pneumatic lifting member 20, and forms a notch. Stepped part 1
A flange 25 concentrically fixed to the lower end of the pneumatic lifting member 20 with bolts 24 is engaged with the flange 9 .

The pneumatic lifting member 20 includes a piston 27 that moves up and down within a cylinder 26 formed at the top of the device body 13.
It is fixed with the required number of bolts 28.

The cylinder 26 is formed by a flanged cylindrical member 30 fixed to the apparatus main body 13 with a required number of bolts 29, and a lid 31 screwed onto this cylindrical member.

Pressurized air is supplied and discharged to and from the upper chamber 26A and lower chamber 26B of the cylinder 26 by a spool valve 33 installed inside a handle base 34a fixed to the upper part of the cylinder with a group of bolts 32.

The spool valve 33 is a valve body 33A that becomes a cylinder.
is formed integrally with the handle base 34a, and when the valve 36 is depressed by pushing a trigger 35 attached to the handle 34 into the handle, pressurized air is supplied to the upper chamber 26A of the cylinder 26. .

When the trigger 35 is released, the spring 3
7 and the spring 38, the valve 36 is displaced from the position shown by the imaginary line in the figure to the position shown by the solid line, so that the valve 36 moves from the position shown in the left half of the figure to the position shown in the right half of the figure. to return to.

Pressure air is supplied to the spool valve 33 through an air supply pipe 40
This shall be done through a dedicated compressor or from the factory's air piping, usually at a rate of 5 kg/ ^cm3.
Apply a certain amount of pressure. Pressure air is supplied to the upper chamber 26A of the cylinder 26 through an air supply pipe 40, a port 41, a spool valve 33, and a port 42.

When the trigger 35 is released, the valve 36 moves upward and the pressurized air in the upper chamber 26A flows to the port 42.
through the lower vent hole 43B of the spool valve 33, and is discharged to the outside from the exhaust port 44, and at the same time,
The valve 36 that has moved upward opens the port 45, and from the port 45 via the port 41 and the spool valve 33,
Pressure air is supplied to the lower chamber 26B, and the piston 2
7 rises to the state shown in the right half of the figure.

Since the present invention is configured as described above, when the handle 34 is grasped with both hands and placed on the metal lid 4 fitted into the container opening, and the notch 14 is pressed onto the folded portion 8 of the metal lid 4, all Pressure surface 1 of press mold piece 11
1a faces the inner peripheral surface of the peripheral wall portion 6 of the metal lid 4.

Here, when the trigger 35 is pulled with a fingertip and pushed into the handle 34, the trigger 35 pushes down the valve 36 of the spool valve 33, so pressurized air is supplied to the upper chamber 26A of the cylinder 26, and the piston 27
is pressed down, the pneumatic lifting member 20 descends, and all the mold pieces 11 are pressed down at once.

At this time, all of the pressing mold pieces 11 use the circular protrusion 12 at the outer end as a fulcrum and the semicircular protrusion 18 at the rear end is pressed down, so the pressurizing surfaces 11a advance outward all at once, and the metal lid The peripheral wall 6 of No. 4 is expanded in diameter to the lower side of the mouth wall of the container.

When you release your finger from the trigger 35, the trigger returns from the position shown by the imaginary line in FIG. 3 to the position shown by the solid line due to the action of the spring 37, and the valve 36 rises, so that the water is not supplied to the upper chamber 26A until then. While the pressurized air that had been stored is removed, pressure air is newly supplied to the lower chamber 26B, and the piston 27 rises, so the pneumatic lifting member 20 also rises, and the entire press mold piece 11
The pressurizing surfaces 11a retreat all at once and return to the state shown in the right half of the figure.

If the handle 34 is lifted in this state, the device of the present invention can be removed from the metal lid 4 which has already been fitted.

As is clear from the above description, the device of the present invention horizontally supports the mold piece, provides a fulcrum at the upper part of the outer end,
Since the inner end can be moved up and down, the lever ratio can be made very large, and the operating force can be reduced, making it possible to make it smaller and more compact, and it has many advantages such as being easy to use even for workers with limited strength. It is something that you have.

Additional Relationship The present invention is patented in Patent No. 1083617 (Japanese Patent Publication No. 1083617).
The main part of the structure of the invention (see Japanese Patent No. 27333) is the main part of the structure of the present invention, and the present invention achieves the same object as the invention of Patent No. 1083667.

More specifically, the present invention is such that the lifting member in the invention of Patent No. 1083667 is raised and lowered using air pressure.

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional side view showing the operating principle of the conventional device, Fig. 2 is an enlarged explanatory view of the main parts during operation, and Fig. 3
The figure is a longitudinal sectional side view showing an embodiment of the apparatus of the present invention, with the right half in a waiting state for starting machining and the left half in a machining completed state, and FIG. 4 is an oblique view of the press piece. 4...Metal lid, 6...Peripheral wall part, 8...Folded part, 11...
Pressing piece, 11a... Pressure surface, 12... Circular protrusion, 13
... Device main body, 14 ... Notch, 15 ... Annular groove, 16 ...
Metal, 16A...Boss, 16B...Flange, 17
...Semicircular guide protrusion, 18...Semicircular protrusion, 19...Notch step, 20...Pneumatic lifting member, 23...Annular metal, 25...Flange, 26...Cylinder, 26A...
Upper chamber, 26B... Lower chamber, 27... Piston, 33... Spool valve, 34... Handle, 35... Trigger, 3
6... Valve, 37, 38... Spring, 40... Air supply pipe, 44
...exhaust port.

Claims (1)

[Claims] 1. A split mold that secures the metal lid to the container mouth by expanding the diameter of the peripheral wall of the metal lid, which has an outward folded part that hooks onto the mouth wall of the container, toward the lower side of the mouth wall of the container. In a metal lid fitting device in which this split mold is used as a set of pressing mold pieces arranged horizontally and radially, each pressing mold piece has a fulcrum point immediately above the pressure surface for diameter expansion formed at the lower part of the outer end. A circular protrusion is provided to provide horizontal support, while a downward annular notch on the side of the main body of the device that presses down on the folded metal lid stacked on the mouth wall of the container is provided with a circular protrusion.
A groove for supporting the circular protrusion is provided, and a pneumatic lifting member is provided at the center to engage with a notch step formed at the lower inner end of each of the pressing pieces, and this pneumatic lifting member is formed at the upper part of the device main body. A metal lid fitting device, which is fixed to a piston in a cylinder and supplies and discharges pressurized air to and from an upper chamber and a lower chamber of the cylinder via a spool valve.