JPH0249994B2 - KYATSUPUBUTAHEIHETSUDOSOCHI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cap-closing head device for fixing a cap with a top surface, a skirt portion, and tear ears to a bottle opening, and more particularly to a cap-closing head device for fixing a cap having a top surface, a skirt portion, and a tear-off ear. This invention relates to a cap lid closing head device with a large degree of performance.

Conventionally, as this type of lid closing head device, there is a type described in Japanese Patent Laid-Open No. 51-46271 filed by the present applicant. That is, as shown in FIG. 1, this type of lid closing head device includes a support sleeve 116 that is fitted into a casing 110 and can slide up and down, and a support sleeve 116 that is fixed to the support sleeve 116 and can move up and down. A pressure plunger 124 and a lid closing sleeve 126 are provided, while a counter pressure plunger 1
A central plunger 122 is fitted within 24, and a pressure sleeve 140 surrounding the lid-closing sleeve 126 has an upper portion joined to a support ring 118 fixed to the casing 110 and a lower portion retaining a wear ring 158 and a lid-closing sleeve 126. The lid of the container is closed by sliding the sloped surface of the lower end of the closing sleeve 126 and the wear ring 158, but since each member for closing the lid is rigidly engaged, the bottle neck and the lid closing are not connected to each other. The drawback is that fine adjustment of the head device is difficult and the bottle often breaks during the closure operation.

In addition, as a cap lid closing device that incorporates work adjustment based on differences in bottle dimensions, differences in bottle lid closing work positions, etc.
The devices described in Japanese Patent Publication No. 25107 and Japanese Patent Publication No. 50-17910 are known, but the sliding movement between the sloped surface of the tightening shoe for closing the lid and the sloped ring can be automatically adjusted to changes in the lid closing work. However, there was still a drawback in that it was not suitable for use.

Therefore, in order to eliminate the above-mentioned drawbacks and streamline the lid-closing operation, the present inventor has completed the present invention by repeatedly making prototypes and conducting practical tests.

SUMMARY OF THE INVENTION Therefore, the general object of the present invention is to improve the conventional cap closing device so as to increase the degree of freedom of engagement between the cap closing head device and the bottle neck, thereby preventing bottle breakage and cap damage during the cap closing operation. To provide a cap lid closing head device capable of eliminating improper closing.

Another object of the present invention is to provide an improved cap-closing head device that is lightweight, compact, and inexpensive.

Another object of the present invention is to provide a cap lid closing head device which is simple in construction and easy to assemble and repair.

Still another object of the present invention is to provide a cap lid closing head device which can be used with caps made of materials other than metal and containers made of materials other than glass.

In order to achieve this object, the present invention comprises a cylindrical lid closing head device for closing a cap with a top surface and a skirt portion onto a bottle opening, the device having a first spring 42 in its center. , a counterpressure plunger 24 into which the center plunger is inserted, and a lid closing sleeve 26 consisting of a number of arms 50 surrounding the counterpressure plunger, each of the arms A tightening shoe portion 52 is formed at the end of the tightening protrusion 54 on the radially inward side and an inclined surface 56 on the radially outward side;
Furthermore, it consists of a support sleeve 16 that removably holds these members, a casing 10 that surrounds this support sleeve 16, and a wear ring 58 that slides into contact with the slope 56 of the tightening shoe. In a cap lid closing head device that closes the lid of a container by sliding with a wear ring 58,
The support sleeve 16 is formed into a frustoconical shape and is loosely inserted into the casing 10.
The lid-closing sleeve 26 is held between the support sleeve 16 and the counterpressure plunger 24 via the spring 48, and the wear ring 58 is placed on the support ring 18 fitted in the inner peripheral groove of the casing. 10, the tightening shoe portion 52, and the lower surface of the support ring 18.

It is preferable that the support ring 18 is divided into two parts, a fixed part 66 and a movable part 68, and each divided surface is formed into a substantially spherical surface so as to be in sliding contact with each other.

Further, the wear ring 58 is held by a retaining ring 60 that adheres to each other, and the wear ring 58 has an inclined surface and comes into sliding contact with the inclined surface 56 of the tightening shoe part 52. Preferably, the retaining ring 60 is an O-ring inserted into a space defined by the convex portion 62 and the stepped portion 63 of the casing 10. Casing 1 through 64
0 is brought into contact with the inner circumferential surface.

Preferably, the upper portions of the wear ring 58 and the retaining ring 60 are configured to abut against the lower surface of the movable portion 68 of the support ring 18.

Preferably, the inner surface of each of the tightening shoe parts 52 includes a bottle neck guiding inclined part 12b, a tightening protrusion 54 that presses the cap skirt part to close the lid, and a concave part 70 that is continuous with this. established in

The lower bent extension of the support sleeve 16 is fixed to an outer circumferential sleeve 74 that slides into contact with the outer wall of the casing through an opening 72 formed in the casing 10, and the lower end of the outer circumferential sleeve 74 impinges on a stopper 76 fixed at a predetermined position. It can be configured so that

Other objects and advantages of the invention will become more apparent from the following description.

Next, preferred embodiments of the cap lid closing head device according to the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 2, a cylindrical casing 10 is formed of a thick-walled metal tube, and a guiding slope 12 is provided at the bottom of the cylindrical casing 10.
A guide ring 14 having a diameter of 15 mm is screwed on to form a conical opening, the upper part of which is provided with a groove 15 for fixing to a lid-closing head support device (not shown).

A support sleeve 16 formed in a truncated conical shape is slidably housed within the casing 10 . The lower end of the support sleeve 16 is placed on a support ring 18 fitted in a groove provided at the upper end of the joint between the casing 10 and the guide ring 14, and the upper part of the support sleeve 16 is placed on a support ring 18 that is fitted into a groove formed at the upper end of the joint between the casing 10 and the guide ring 14. The second spring 20 housed in a spring housing (not shown) presses the second spring 20 downward in the axial direction.

Inside the support sleeve 16, a center plunger 22, a counter pressure plunger 24 into which the center plunger 22 is inserted, and a lid closing sleeve 26 surrounding the counter pressure plunger 24 are housed in the center of the support sleeve 16.

The counterpressure plunger 24 consists of an upper constricted part and a lower enlarged part, and the constricted part is inserted into the upper opening of the support sleeve, and is fixed to the top surface of the support sleeve 16 by screwing with a nut 30 via a washer 28. Further, the support sleeve 16 is fixed to the upper and lower surfaces of the support sleeve 16 by inserting a spacer 32 into a groove provided in the joint portion. The spacer 32 is available in various sizes, and can be selected and used to adjust the lower end of the counterpressure plunger 24 to a predetermined position depending on the height of the bottle. The nut 30 and the counterpressure plunger constriction are screwed together by a stop pin 34 through a threaded hole provided on the side surface of the nut 30. A curved surface 36 is formed at the enlarged lower end edge of the counterpressure plunger 24 .

The central plunger 22 consists of a thin tube 38 that slides in contact with the constricted portion of the counter pressure plunger 24 and a sleeve 40 that slides in contact with the enlarged portion of the counter pressure plunger 24. The end of the thin tube 38 is fixed to the bottom closed bottom of the sleeve 40. It is formed as a double pipe, and the first
The spring 42 is inserted, and the first spring 42
The upper end abuts the stepped inner surface of the counterpressure plunger 24,
The lower end of the first spring 42 presses against the bottom of the sleeve 40 . The bottom of the sleeve is located slightly below the lower end of the guide ring 14. The upper part of the capillary tube 38 is provided with an elongated through hole 44 oriented in the axial direction, and a pin 46 mounted in the capillary tube of the counterpressure plunger 24 is inserted into the hole 44 so as to slide up and down the capillary tube 38 in a non-rotational manner. make it move. The sleeve 40 is the counter pressure plunger 2
It is configured to be slightly shorter than the length of the enlarged portion of No. 4.

The lid-closing sleeve 26 has an upper end bent radially inward at a right angle, and the upper surface of this bent portion abuts the lower surface of the support sleeve 16, and a disc spring 48 is provided between the lower surface and the stepped portion of the counterpressure plunger 24. It will be done. Disc spring 48 can be replaced by other spring means such as a coil spring.

The lid closing sleeve 26 is composed of a large number (usually about 20) of lid closing arms 50.
each has a tightening shoe portion 52 at its free end. The tightening shoe portion 52 includes a tightening convex portion 54 on the radially inward side and an inclined surface 56 on the radially outward side.

Inclined surface 56, guide ring 14 and support ring 18
A wear ring 58 and a retaining ring 60 are housed in a space defined by the retaining ring 60, and the wear ring 58 is held within the retaining ring 60. 56. There is a protrusion 6 in the center of the outer surface of the retaining ring.
2, the convex portion 62 abuts in a groove provided on the inner surface of the guide ring, and the upper surface of the wear ring 58 and the retaining ring 60 abuts the lower surface of the support ring 18. The wear ring 58 has a low coefficient of friction and a high hardness number, preferably less than 0.1 with water lubrication, and
Made of a suitable plastic material, approximately Rockwell hardness number 120 or higher. For example, formaldehyde plastics such as Delrin (registered trade name) are preferably used. Stainless steel is preferably used as the retaining ring 60.

FIG. 3 shows an improved arrangement of the lid-closing head device of FIG.
It is possible to swing slightly inside. Next, the retaining ring 60
The engagement between the inner surface of the guide ring 14 and the retaining ring 6
This is done via two rubber O-rings 64 that are inscribed in a space defined by a holding ring convex portion 62 and a groove provided on the inner surface of the guide ring 14. The support ring 18 is divided into two parts, a fixed part 66 and a movable part 68, which are in sliding contact with each other on a spherical surface, and both parts are preferably made of stainless steel and brass, respectively.
The upper surfaces of the wear ring 58 and the retaining ring 60 abut against the movable lower surface, allowing both rings to move upward. Further, the tightening shoe portion 52 is configured such that the guide slope portion of the guide ring 14 is coupled to the lower portion thereof,
Therefore, the guide ring 14 is simply screwed onto the lower part of the casing 10 to form a cylindrical casing, while the tightening shoe portion 52 has a guide slope 12 that forms a conical opening in the radial inward direction. However, a tightening protrusion 54 and a recess 70 are formed continuously to the guide slope 12.

The embodiment of FIG. 4 is a cross-sectional view of an improved closure head device for cans with poor pressure resistance, in which the radial extension of the support sleeve 16 extends beyond the casing 10.
The casing 1
0 is fixed to an outer circumferential sleeve 74 that slides into contact with the outer wall,
The lower end of the outer circumferential sleeve 74 is stopped by a stopper 76 fixed at a predetermined position. Even if the movement of the circumferential sleeve is stopped, the casing 10 and the support ring 18 fixed thereto, as well as the wear ring, etc., can be lowered. The device shown in FIG. 4 is an example in which a stopper is provided in the device shown in FIG. 2, but the device shown in FIG. 3 can be similarly provided with a stopper.

Next, the operation of the cap lid closing head device shown in FIG. 2 will be explained.

The capping head is suspended on a support device (not shown) and is moved by an actuating device (not shown) to a capping position above the bottle. The bottle is covered in a previously known manner with a cap material. The lid closing head device descends perpendicularly to the bottle, and first, the lower end surface of the center plunger 22 comes into contact with the top surface of the cap, and descends while pressing the cap and the bottle by the action of the first spring 42, and the lower end surface is the curved surface 3 of the inner edge of the counterpressure plunger 24
Reach within 6. Since the pressure of the first spring 42 is weak, if the center plunger does not coincide with the center of the cap, it reaches the curved surface 36 while being adjusted by the guiding slope 66 so that the center plunger and the centers of the cap and bottle coincide. Next, the center plunger 22 and the counter pressure plunger 24 lower end surface 36
When the bottle and cap are pressed down against the pressure of the second spring 20, the lid closing sleeve 26 and the support sleeve 16 are also pushed up together.
By this pushing up, the inclined surface 12 of the tightening shoe portion 52
moves radially inward while sliding on the wear ring 58, and the protruding portion 54 of the tightening shoe portion 52 applies lid-closing pressure to the skirt portion of the cap, causing the skirt portion to slide along the bulge edge of the bottle opening. Fix it to the bottle mouth.

If the lid-closing head and bottle are always held in a straight line on the center line, there will be no irregular pressure, but under continuous operation it is difficult to maintain this ideal operation. Currently, the irregular pressure often causes the bottle to break and the cap to close incorrectly.

However, with the improved lid closure head arrangement of the present invention, a slightly offset centerline allows the support sleeve to tilt with respect to its centerline, as well as all members supported by the support sleeve. According to this inclination, the wear ring is also radially attached to the support ring 1 via the O-ring 64.
It can be axially deflected and adapted via the movable part 68 of 8. Irregular force due to deviation of the center line is absorbed by the disc spring 48, and irregular forces are prevented from acting on the neck of the bottle. Furthermore, the lid closing arm is usually 20
The irregular component force of the lid closing pressure, which is composed of one or more arms and whose mouth is elliptical, is determined by the deviation of each arm,
This is absorbed by a disc spring 48 that supports each arm.

As mentioned above, the lid-closing head device according to the present invention can absorb abnormal lid-closing pressure and prevent irregular pressure, so strong metals or plastics can be used as the material for the cap. It can be applied to a wide range of materials, and is also suitable for closing caps with large diameters. In this case, the recess 70 of the tightening shoe portion 52 promotes deformation of the hard cap material when the cap is tightened.

Furthermore, as shown in FIG. 4, the improved lid-closing head device according to the present invention has the advantage that when the cap is fixed to a container with poor pressure resistance, such as a can bottle 78, the lower end curved surface 36 of the pressure plunger 24 is A stopper 76 is provided to prevent pressure above a certain level from being applied to the can 78 when it comes into contact with the cap, and the support sleeve 1
The outer peripheral sleeve 74 fixed to the stopper 76
If the adjustment is made so as to stop the lid, the lid can be closed without excessive axial pressure being applied to the can bottle 78, which has poor pressure resistance.

That is, after the outer circumferential sleeve 74 hits, the casing 10 can continue to descend, and the wear ring 58 also descends together to press the tightening shoe part 52 in the radial inward direction to complete the lid closing operation. It is preferable that the can bottle 78 is placed on a stand 80 with a buffer spring. When the lid closing operation is completed, the lid closing head is raised by the reverse course, and the support sleeve 16 is pushed down by the expansion of the second spring,
The tightening shoe part 52 is pushed away from the bottle, and then the first
The action of the spring causes the bottle to be released from the closure head. Since the guide ring and the tightening shoe part 52 are integrally formed, the disadvantage that the ears of the cap get caught on the guide ring and causes damage is also eliminated.

The lid closing head of the present invention is extremely easy to assemble and disassemble, and by rotating the guide ring 14 at the tip counterclockwise and unscrewing it from the casing 10, all the members inside the casing fall out one by one. Then it comes out. Therefore, the wear ring 58, where wear is concentrated, can be easily replaced.

According to the cap lid closing head device according to the present invention, damage to bottles during lid closing work and loss due to improper lid closing of the cap are prevented, work efficiency is improved, the device is lightweight and low cost, and repair of the device is easy. This facilitates the continuous closing of caps with tear ears.

Although the preferred embodiments of the present invention have been described above, it goes without saying that various design changes can be made without departing from the spirit of the present invention.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a conventional cap-closing head device, FIG. 2 is a cross-sectional view of a cap-closing head device according to the present invention, and FIG. 3 is another improved cap-closing head device according to the present invention. FIG. 4 is a sectional view of a cap lid closing head device for a can bottle, which is equipped with an improved stopper. 10... Casing, 12a, 12b... Guide slope, 14... Guide ring, 15... Groove, 16
...Support sleeve, 18...Support ring, 20...
...Second spring, 22...Center plunger, 2
4... Counter pressure plunger, 26... Lid closing sleeve,
28...Washer, 30...Nut, 32...Spacer, 34...Stop pin, 36...Curved surface, 38...Thin tube, 40...Thick tube, 42...First spring, 4
4...through hole, 46...pin, 48...disc spring,
50...Lid closing arm, 52...Tightening shoe part, 5
4... Tightening protrusion, 56... Inclined surface, 58... Wear ring, 60... Retaining ring, 62... Convex portion,
63...Step part, 64...O-ring, 66...Fixed part, 68...Movable part, 70...Recessed part, 72...
Opening, 74... Outer sleeve, 76... Stopper, 78... Can bottle, 80... Buffer stand, 110...
Casing, 116...Support sleeve, 118...
...Support ring, 122 ...Center plunger, 12
4... Counter pressure plunger, 126... Lid closing sleeve, 140... Pressure sleeve, 150... Lid closing arm, 158... Wear ring.

Claims (1)

[Scope of Claims] 1. Consists of a cylindrical lid-closing head device for closing a cap having a top surface and a skirt portion onto a bottle opening,
The device is composed of a center plunger 22 supported by a first spring 42 at its center, a counter pressure plunger 24 into which the center plunger is inserted, and a number of arms 50 surrounding the counter pressure plunger. A tightening shoe portion 52 is provided at the end of each arm with a tightening protrusion 54 on the radially inward side and an inclined surface 56 on the radially outward side.
and a support sleeve 16 for detachably holding these members, a casing 10 surrounding this support sleeve 16, and a wear ring 58 that slides into contact with the slope 56, and the slope of the tightening shoe In a cap lid closing head device that closes the lid of a container by sliding between the surface 56 and the wear ring 58, the support sleeve 16 is formed into a truncated conical shape and is loosely inserted into the casing 10, and the support sleeve 16 is inserted around the inner periphery of the casing 10. The lid-closing sleeve 26 is placed on the support ring 18 fitted in the surface groove, and the spring 48
via the support sleeve 16 and the counterpressure plunger 24
The wear ring 58 is held between the casing 10, the tightening shoe portion 52, and the lower surface of the support ring 18, and the wear ring 58 is slidably held within the space defined by the inner peripheral surface of the casing 10, the tightening shoe portion 52, and the lower surface of the support ring 18. Cap lid closing head device. 2. The cap lid closing head device according to claim 1, wherein the support ring 18 is divided into two parts, a fixed part 66 and a movable part 68, and each divided surface is formed into a substantially spherical shape so as to be in sliding contact with each other. . 3. The wear ring 58 is held by a retaining ring 60 and has an inclined surface so as to be in sliding contact with the inclined surface 56 of the tightening shoe part 52. On the other hand, a convex portion 62 is provided in the center of the retaining ring and this is connected to the inner circumference of the casing 10. The cap lid closing head device according to claim 1, wherein the cap lid closing head device is brought into contact with the surface groove portion. 4 The retaining ring 60 connects the convex portion 62 and the casing 10
Claim 1, characterized in that the O-ring 64 is inserted into the space defined by the stepped portion 63 of
The cap lid closing head device according to item 1 or 3. 5. The upper parts of the wear ring 58 and the retaining ring 60 are brought into contact with the lower surface of the movable part 68 of the support ring 18.
Cap lid closing head device as described in Section 1. 6. On the inner surface of each of the tightening shoe parts 52, there are a bottle neck guiding slope part 12b, a tightening protrusion 54 that presses the cap skirt part and closes the lid, and a recessed part 70 that is continuous with this. A cap lid closing head device according to claim 1, characterized in that the cap lid closing head device is formed. 7. A radial extension is provided at the lower part of the support sleeve 16, and this is fixed to an outer circumferential sleeve 74 that slides into contact with the outer wall of the casing through an opening 72 formed in the casing 10, and the lower end of the outer circumferential sleeve 74 is 7. The cap lid closing head device according to claim 1, wherein the cap lid closing head device is stopped by a stopper 76 fixed at a predetermined position.