JP2003128186A - Capping head and capping machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely seam a cap material without causing a bottle mouth to deform in a capping machine. SOLUTION: A capping head 100 includes a pressure block 120 for pressing a top surface of the cap material C put over a bottle mouth 111 having a thread 112 onto the bottle mouth 111, and a roller mechanism 130 for forming the thread on a side face of the cap material C. The roller mechanism 130 includes a roller 131 which is formed to be disklike and has an outer peripheral surface to be pressed against the cap material C, a spindle 151 provided along the direction of an axis O of the cap material C, a support arm 140 supported by the spindle 151 and rotated with the spindle 151 as the center to rotatably support the roller 131, a force applying member 141 to apply force to rotate the arm 140 in the direction to cause the outer peripheral surface of the roller 131 against the side face of the cap material C, and a limiting member P for limiting a rotation range of the support arm 140 by the force applied by the member 141.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a capping head and a capping machine for forming a screw portion on a cap member covered with a bottle mouth portion having a screw portion and attaching the cap member to the bottle mouth portion.

[0002]

2. Description of the Related Art Conventionally, a capping machine has been used as an apparatus for sealing a bottle. The capping machine covers the bottle mouth portion where the screw portion is formed with a cup-shaped cap material made of a plastic material such as aluminum, deforms the cap material along the shape of the screw portion on the bottle side, and tightens it. It is a device that is attached as a cap to seal the bottle tightly.

Here, a conventional example of the capping head in the capping machine M is shown in FIGS. 3 (a) to 3 (c).
Will be described with reference to. The capping machine M is a device for attaching a cap while transporting the aluminum bottle 10, and the capping head 20 is configured in a transport path of the aluminum bottle 10 transported from the left side to the right side in FIG.

In this capping head 20, the top surface of the cap material C covered with the bottle mouth portion 11 is attached to the bottle mouth portion 1.
1, and a roller mechanism 4 for pressing the outer peripheral surface of the cap material C against the bottle mouth 11
0, and is moved up and down at the upper part of the bottle mouth 11 by the head elevating mechanism 50 shown in FIG.

FIG. 3A shows a state before the capping head 20 is lowered by the head lifting mechanism 50, and FIG. 3B shows the capping head 20 with the head lifting mechanism 5.
0 shows a state in which the top surface of the cap material C is pressed against the bottle mouth portion 11, and FIG.
The cone cam 36 is lowered and each roller (PP roller 4
1, the RO roller 42) is pressed against the side surface of the cap material C.

The head lifting mechanism 50 includes an upper cam 51.
And a cam follower 52, and the cam follower 5 moves in the upper cam 51 from the left side to the right side in the drawing.
By raising and lowering 2, the head support rod 53 attached to the cam follower 52 can be raised and lowered integrally. A cam follower 62 is provided at an intermediate portion of the head support rod 53 so as to be movable along an axis, and a pressure block 30 and a support member 44 that supports the roller mechanism 40 are fixed.

The pressure block 30 can be moved up and down together with the head support rod 53 to press the top surface of the cap material C against the bottle mouth 11. The head support rod 53 is attached to the cam follower 52 via the spring 31, and a load corresponding to the spring force of the spring 31 is applied to the top surface of the cap material C.

The cam follower 62 constitutes a cone cam lifting mechanism 60 together with the lower cam 61.
It is moved up and down by sliding inside. The cam follower 62 includes a small diameter portion 36 a for driving the roller mechanism 40.
A cone cam 36 having an outer peripheral surface in which a large diameter portion 36b is continuously formed is fixed, and the cone cam 36 is configured to move up and down as the aluminum bottle 10 is transported.

The roller mechanism 40 is rotated relative to the cap material C about the axis while the outer peripheral surfaces of the PP roller 41 and the RO roller 42 are pressed against the side surfaces of the cap material C, so that The roller pushes the side surface of the cap material C along the valley portion of the groove portion 12 on the bottle mouth portion 11 side, deforms it, and tightens it.

The PP roller 41 is a roller for forming the skirt portion of the pill fur proof cap by folding the lower end portion of the cap material C below the ring-shaped convex portion provided at the bottom of the bottle mouth portion 11. The RO roller 42 is a roller for pressing the side surface of the cap material C along the thread groove on the side surface of the bottle mouth portion 11 to form a threaded portion.

The support member 44 fixed to the head support rod 53 rotatably holds the support shafts 45 at equal intervals on the circumference around the axis of the cap material C.
One end of a support arm 46 that rotatably supports the rollers 41 and 42 is fixed to the lower end of the support shaft 45, and the support arm 46 is rotated integrally with the support shaft 45. On the other hand, at the upper end of the support shaft 45, the cone cam 36
One end of a cam arm 48 that rotatably supports the cam roller 47 that is abutted against is fixed, and the cam arm 48 is rotated integrally with the support shaft 45.

The cam arm 48 and the support arm 46 are integrally rotated via the support shaft 45, and the support shaft 4
5, the one end is fixed to the support member 44, and the other end is fixed to the support shaft 45, the cam arm 48 or the support arm 46 by the torsional force of the torsion spring 49. The cam arm 48 is constantly urged in the direction in which the rollers 41 and 42 are pressed against the cap material C.

The rotation of the cam arm 48 is performed by the cam follower 6
It is performed by a cone cam elevating mechanism 60 which is composed of a cone cam 36 which is elevated and lowered together with 2 and a cam roller 47 which is in contact with the outer peripheral surface thereof. That is, the cone cam 36 moves up and down, and the contact portion of the cam roller 47 relatively moves from the large diameter portion 36b of the cone cam 36 to the small diameter portion 36a, whereby the cam roller 47 moves toward the axis of the cap material C.

As a result, the cam arm 48 is rotated, and the support arm 46 moves the support arm 46 through the support shaft 45.
42 is rotated in the direction of approaching the axis of the cap material C, and the rollers 41, 42 move the torsion spring 49.
Cap material C with pressure (side load) according to the twisting force of
(Fig. 3 (c)). In this state, the entire roller mechanism 40 relatively rotates around the cap material C (bottle mouth portion 11), so that the rollers 41 and 42 press and deform the side surface of the cap material C along the thread groove roots on the bottle side. The cap material C can be wound tightly to tightly close the bottle.

The RO roller 42 is constantly urged upward by a spring 43, and is pressed against the upper end of the bottle mouth portion 11 and then rotated around the outer peripheral surface of the cap material C, whereby the bottle mouth portion 11 is rotated. The cap member C is moved downward while deforming the cap material C from the thread end along the valley of the groove 12. When the RO roller 42 is released from being pressed after the screw portion of the cap material C is formed, the RO roller 42 is moved upward by the spring 43 and returns to the upper portion of the bottle mouth portion 11 (the initial position of groove formation). become.

[0016]

When forming the threaded portion on the cap member in this way, it is desirable to increase the side load for pressing the roller against the cap member in order to surely form the threaded portion. The side load is adjusted by adjusting the twisting force (twisting angle) of the torsion spring when the capping head having the roller mechanism as described above is used.

When the bottle mouth portion is made of glass, the strength of the bottle mouth portion is high and it is difficult to be deformed even if the side load is sufficiently high. Therefore, the cap member is deformed quickly and surely, and the cap member is securely tightened. be able to.

However, when a metal cap is wound around the mouth of an aluminum or aluminum alloy bottle (hereinafter referred to as an aluminum bottle), the bottle mouth is crushed and deformed if the side load is too high. On the other hand, when the side load is insufficient, the amount of deformation of the cap member is insufficient, which may cause problems such as idling of the attached cap and slipping out.

That is, it is difficult to determine the appropriate value of the side load even when considering the strength of the bottle mouth portion and the load required for the deformation of the cap member. Further, in the capping head as described above, the torsion spring is twisted. Since the side load is changed by adjusting the force, there is a problem that it is difficult to adjust the side load.

The present invention has been made in view of the above problems, and an object of the present invention is to reliably tighten a cap member in a capping machine without deforming the bottle mouth.

[0021]

In order to solve the above-mentioned problems, the capping head according to the invention of claim 1 presses the top surface of the cap material, which is covered with the bottle mouth portion having the threaded portion, against the bottle mouth portion. What is claimed is: 1. A capping head comprising a pressure block and a roller mechanism for forming a threaded portion on a side surface of a cap member, wherein the roller mechanism is formed in a disc shape and has an outer peripheral surface pressed against the cap member; A support shaft provided along the axial direction of the material, a support arm that is supported by the support shaft and is rotated around the support shaft, and that rotatably supports the roller,
An urging member for urging the support arm to rotate in a direction of pressing the outer peripheral surface of the roller against the side surface of the cap member, and a restricting member for restricting the rotation range of the support arm by the urging force of the urging member. It is characterized by that.

According to the present invention, by restricting the rotation range of the support arm by the restricting member, it is possible to prevent the roller from being pushed inward from the root diameter of the threaded portion of the bottle mouth, so that the side load can be prevented. Even when the height is high, it is possible to realize a capping head capable of securely tightening the cap material without deforming the bottle mouth portion.

A capping head according to a second aspect of the present invention is the capping head according to the first aspect, wherein the regulating member is a pin that abuts a side surface of the support arm. According to this invention, since the rotation range of the support arm is regulated by the pin, by adding the pin to the conventional capping head, it is possible to easily and securely without deforming the bottle mouth portion without increasing the device cost. It is possible to realize a capping head that can be tightened with a cap material.

A capping head according to a third aspect of the present invention is the capping head according to the second aspect, wherein the pin is an eccentric pin. According to the present invention, the contact point that restricts the rotation of the support arm can be easily changed by rotating the eccentric pin.

A capping machine according to a fourth aspect of the present invention includes the capping head according to any one of the first to third aspects, and a head elevating mechanism for elevating the capping head. According to the present invention, by restricting the rotation range of the support arm with the restricting member, it is possible to prevent the roller from being pushed inward from the root diameter of the threaded portion of the bottle mouth, so that the side load is high. In addition, it is possible to realize a capping machine equipped with a capping head that can securely wind the cap material without deforming the bottle mouth portion.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a capping head according to an embodiment of the present invention. A capping machine M including this capping head 100
After carrying the aluminum bottle 110 used for beverages and the like along a predetermined carrying path and covering the bottle mouth portion 111 of the carried aluminum bottle 110 with the cap material C,
This is a device for winding and tightening the cap material C by the capping head 100 to attach the cap to the aluminum bottle 110 and seal it.

The aluminum bottle 110 has a threaded portion 112 formed at a bottle mouth portion 111. Further, a plurality of rollers 131 (for example, four rollers) are usually provided by combining a PP roller and an RO roller, but all of them are omitted here as the rollers 131.

The capping head 100 shown in FIG.
Pressure block 120 that presses the top surface of the cap material C that covers the bottle mouth 111 against the bottle mouth 111.
And a roller mechanism 130 that presses the side surface of the cap material C against the bottle mouth portion 111, and is fixed to the lower portion of the head support rod 101 via a support block 150.

The head support rod 101 is moved up and down by a head elevating mechanism 50 (see FIG. 3) similar to that of the prior art, which is composed of an upper cam 51 formed on the upper portion and a cam follower 52 fixed on the upper portion, and capped. The head 100 (pressure block 120 and roller mechanism 130) is moved up and down together.

The roller mechanism 130 includes the head support rod 1
01 is fixed to the head support rod 101 via a support block 150 fixed to the outside. As shown in FIG. 2, the support block 150 has an axis O of the cap material C.
Four support shafts 151 are rotatably held at equal intervals on a circumference centered at. A support arm 140 is fixed to the lower part of the support shaft 151, and a support member 160 is fixed to the upper part thereof.

Further, a torsion spring (biasing member) 141 is fitted on the support shaft 151. The lower end 141a of the torsion spring 141 is fixed to the support shaft 151, and the upper end 141b of the torsion spring 141 is supported by the support block 1.
By being fixed to 50, the support shaft 151 (support arm 14) is always provided in the direction in which the roller 131 approaches the axis O.
0, the support member 160) is a torsion spring for urging the rotating member.

The support arm 140, as shown in FIG.
The roller 131 is rotatably supported at one end in the longitudinal direction,
The other end is fixed to a support shaft 151 provided along the axis O of the cap material C, and is rotated so that the roller 131 approaches or separates from the cap material C as the support shaft 151 rotates. It

The supporting member 160 is provided with a cam roller 162 via a cam shaft 161 provided at one end along the axis O.
Is rotatably supported. This cam roller 162
Is brought into contact with a cone cam 163 that is provided to be movable up and down with respect to the head support rod 101, and the cone cam 163 is moved up and down to move the radial position with respect to the axis O. The other end of the support member 160 has a support shaft 15
It is fixed at 1. Cam roller 162 is cone cam 1
When moved by 63, the support member 160 moves the support shaft 15
1 is rotated in the horizontal direction to rotate the support shaft 151, that is, the support arm 140, to move the roller 131 toward or away from the cap material C.

The cone cam 163 is the head support rod 1
01 upper and lower cone cams 61 and a cam follower 62, similar to the conventional cone cam lifting mechanism 6
0 (see FIG. 3) raises and lowers relative to the cam roller 162. Large diameter part 163 of this cone cam 163
When the cam roller 162 is in contact with a, the support member 160, the support shaft 151, and the support arm 140 are
The roller 131 is rotated to a position where it is separated from the axis O (cap material C).

On the other hand, when the cone cam 163 descends relative to the cam roller 162 and the cam roller 162 and the small diameter portion 163b of the cone cam 163 are at the same height, the cam roller 162 approaches the axis O and the supporting member 160 The support shaft 151 and the support arm 140 are rotated by the urging force of the torsion spring 141 to bring the roller 131 into contact with the cap material C.

In the state shown in FIG. 1, the roller 131 is brought into contact with the cap material C by the torsion spring 141,
The cam roller 162 is a small diameter portion 163b of the cone cam 163.
, That is, a state in which the biasing force of the torsion spring 141 is entirely applied to the roller 131. That is, since the side load applied to the cap material C by the roller 131 is equal to the spring force of the torsion spring 141, the torsion spring 1
If the spring force of 41 is excessive, not only the cap material C may be deformed but also the bottle mouth portion 111 may be deformed. However, the surface of the support block 150 of the present embodiment on the support arm 140 side (see FIG. An eccentric pin (regulating member) P that restricts each roller from entering the inner diameter side of the axis O is provided on the lower surface (1).

As shown in FIGS. 1 and 2, the eccentric pin P projects so as to come into contact with the side surface of the supporting arm 140, and the supporting arm 140 is formed such that the outer peripheral surface of the roller 131 is a valley of the screw portion 112. It is regulated so that it is stopped at a position where it cannot move to the inner diameter side of the groove contacting the outer peripheral surface. By providing the eccentric pin P, even if the spring force (torsion force) of the torsion spring 141 is excessively large, the position of the support arm 140 is regulated and the roller 1 is prevented.
Since 31 is not pushed inward more than necessary, there is no risk of deforming the bottle mouth portion 111.

Further, by making the eccentric pin P eccentric, the contact point with the side surface of the support arm 140 can be changed, so that the cap member C or the bottle mouth portion 1 can be changed.
11 diameter and material (strength), torsion spring 141
The position of the roller 131 can be changed according to conditions such as the spring force of the roller.

As described above, the torsion spring 14
Since the rotation position of the support arm 140 that presses the roller 131 against the cap material C by 1 is restricted by the eccentric pin P, even if the torsional force of the torsion spring 141 is large, the roller 131 does not move the bottle mouth portion 111. It does not move so much that it is deformed, and it is possible to securely perform tightening.

The shapes and combinations of the constituent members shown in the above embodiment are merely examples, and various modifications can be made based on design requirements without departing from the spirit of the present invention. The support block 150 is shown.
Although the eccentric pin P as the regulating member is provided in the above, the installing position of the regulating member may be any position as long as it can regulate the rotational position of the support arm 140, for example, the pressure block 120.
A configuration may be used in which it is erected on the outer peripheral surface by a screw or the like.

In addition to the use of the eccentric pin P, a large number of mounting holes for fixing the pin (regulating member) are provided to change the pin mounting position to adjust the contact point between the support arm and the pin. Is also possible.

[0042]

As described above, according to the roller mechanism of the capping head of the first aspect of the present invention, the rotation range of the support arm is regulated by the regulation member, so that, for example, the screw portion of the bottle mouth is Since the roller can be prevented from being pushed inward of the root diameter, it is possible to realize a capping head that can securely tighten the cap material without deforming the bottle mouth even when the side load is high. . Therefore, the spring force of the torsion spring for urging the roller can be set to be sufficiently strong so that the screw groove can be surely formed in the cap member, and stable winding can be performed.

According to the roller mechanism of the capping head of the second aspect of the present invention, since the rotation range of the support arm is restricted by the pin, the pin is added to the conventional capping head to increase the apparatus cost. It is possible to realize a capping head that can easily and securely wind the cap material without deforming the bottle mouth portion.

According to the capping head of the third aspect of the present invention, the contact point for restricting the rotation of the support arm can be easily changed by rotating the eccentric pin. Therefore, the setting of the pushing amount of the roller with respect to the cap material can be easily changed according to the conditions such as the cap diameter, the bottle diameter, and the spring force of the torsion spring, and the capping head with excellent workability is realized.

According to the capping machine of the fourth aspect of the present invention, the roller is pushed inward, for example, from the root diameter of the threaded portion of the bottle mouth by restricting the rotation range of the support arm by the restriction member. Can be prevented,
Even if the side load is high, it is possible to realize a capping machine equipped with a capping head that can securely tighten the cap material without deforming the bottle mouth portion.

[Brief description of drawings]

FIG. 1 is a diagram showing a roller mechanism of a capping head according to the present invention.

FIG. 2 is a view of the roller mechanism of the capping head according to the present invention as seen from below.

FIG. 3 is a diagram for explaining cap tightening by a roller mechanism of a conventional capping head.

[Explanation of symbols]

50 head lifting mechanism 100 capping head 111 Bottle mouth 112 screw part 120 pressure block 130 roller mechanism 131 Roller 140 support arm 141 torsion spring (biasing member) 151 support shaft 162 cam roller C cap material M capping machine P Eccentric pin (Regulating member)

Continued front page    (72) Inventor Ouzaki Kibun             Mitsubishi Ma, 1500 Suganuma, Oyama-cho, Sunto-gun, Shizuoka Prefecture             Terial Co., Ltd. Fuji Oyama Factory F-term (reference) 3E080 AA08 BB01 CE05 CF02

Claims (4)

[Claims] 1. A capping provided with a pressure block for pressing a top surface of a cap material, which is covered with a bottle mouth portion having a threaded portion, to the bottle mouth portion, and a roller mechanism for forming a threaded portion on a side surface of the cap material. A head, wherein the roller mechanism is formed in a disk shape and has an outer peripheral surface that is pressed by the cap member, a support shaft provided along the axial direction of the cap member, and the support shaft. And a support arm for rotatably supporting the roller, and a support arm for rotating the support arm in a direction in which the outer peripheral surface of the roller is pressed against the side surface of the cap member. A capping head comprising: a biasing member for biasing; and a restricting member for restricting a rotation range of the support arm by the biasing force of the biasing member. 2. The capping head according to claim 1, wherein the restricting member is a pin that abuts a side surface of the support arm. 3. The capping head according to claim 2, wherein the pin is an eccentric pin. 4. A capping machine comprising: the capping head according to claim 1, and a head elevating mechanism for elevating the capping head.