JP4391380B2 - Cap mounting device - Google Patents

Description

  The present invention relates to a cap mounting device used for mounting a pre-screw cap such as a synthetic resin cap on a container.

Conventionally, as a cap mounting device, a suspension mechanism for holding a synthetic resin container in a suspended state, a cap screwing mechanism for screwing a pre-screw cap to the mouth of the container, and a container that is locked to the lower surface of the flange portion There is one provided with a rotation stop blade portion that prevents rotation in the cap screwing direction (for example, Patent Document 1).
The cap mounting device described in this patent document supports a container by a suspension mechanism, and a pre-screw cap is attached to a container mouth by a cap screwing mechanism in a state where the rotation-preventing blade is in contact with the lower surface of the flange. Screw it on.
The rotation stop blade portion is formed in a straight line shape along the radial direction of the container, and prevents the rotation of the container when the cap is screwed.
Registered Utility Model No. 3003750

  However, in the configuration of the cap mounting device described above, the rotation prevention blade portion is not sufficiently locked to the lower surface of the flange portion, the container rotates with the cap when the cap is screwed, and a sufficient closing torque cannot be obtained. There was a risk that cap closure would be insufficient.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a cap mounting device that can prevent the container from rotating when the cap is screwed and can prevent the cap from being screwed insufficiently.

A cap mounting device according to the present invention includes a suspension mechanism that holds a container having a thread portion at a mouth portion and a flange portion at a neck portion in a suspended state by supporting the flange portion, and the suspension mechanism. A cap screwing mechanism for screwing a pre-screw cap onto the mouth of the container held by the container, and a suspension mechanism provided on the lower surface of the flange portion of the container to rotate the container in the cap screwing direction. And a rotation stopper unit formed with a rotation stopper blade portion for preventing the rotation of the rotation stopper blade portion, the rotation stopper blade portion is formed in a straight line, and the formation direction thereof is relative to the radial direction of the container. The cap mounting device is provided so as to be inclined so that the front end portion of the rotation stop blade portion is located on the side opposite to the cap screwing direction from the rear end portion.
In the cap mounting device according to the present invention, the distance from the rear end portion of the rotation stop blade portion to the container central axis is equal to or less than the radius of the flange portion, and the rotation of the rotation stop blade portion with respect to the radial direction of the container is performed. It is preferable that the inclination angle of the stop blade portion is 5 to 30 °.
In the cap mounting device according to the present invention, the distance from the rear end portion of the rotation stop blade portion to the container central axis is larger than the radius of the flange portion, and the diameter of the container is at the intersection of the rotation stop blade portion and the outer peripheral edge of the flange portion. It is preferable that the inclination angle of the rotation stop blade portion with respect to the direction is 5 to 30 °.

In the cap mounting device according to the present invention, the front end portion of the rotation-preventing blade portion formed in a linear shape is opposite to the cap screwing direction than the rear end portion of the rotation-preventing blade portion with respect to the radial direction of the container. It is comprised so that it may be located in the side of.
With this configuration, when the cap is rotated by the cap screwing mechanism and screwed into the container, even if a rotational force in the same direction as the screwing direction of the cap acts on the container, In addition to the direction perpendicular to the rotation stop blade portion, a component force along the formation direction of the rotation stop blade portion acts.
As a result, the locking of the rotation stopper blade to the lower surface of the flange portion is more reliable, and the cap is securely screwed to the container. It is possible to greatly reduce malfunctions that occur.

The best mode for carrying out the present invention will be described below with reference to the drawings.
1-3 is a figure which shows the cap mounting apparatus 1 which concerns on this invention.
The cap mounting device 1 includes a center star 2 (a suspension mechanism) that suspends and holds a container 5 and a pre-screw cap 6 (hereinafter referred to as a cap) that is screwed onto the container 5 that is held by the center star 2. The spinning head set 3 (cap screwing mechanism) and the rotation stop unit 27 that prevents the rotation of the container 5 when the cap 6 is screwed are provided.

  As shown in FIG. 2, the container 5 is made of a synthetic resin such as PET. A screw part 5a is formed at the mouth of the container 5, and a flange-like flange part 5b is formed at the neck part 5f.

As shown in FIG. 3, the center star 2 includes a support 22, an upper star wheel 24 provided on the upper part of the support 22, a turntable 23 provided on the lower part of the support 22, and a lower star wheel 25. Is provided.
The upper star wheel 24 and the lower star wheel 25 are connected via a support member 26. Further, the support member 26 is fixed to the support column 22.
The upper star wheel 24 is formed with an arcuate pocket 21 in which the neck portion 5f of the container 5 is accommodated, and the peripheral portion of the pocket 21 of the upper star wheel 24 supports the flange portion 5b so that the container 5 is suspended. It is to hold.

As shown in FIG. 1, the rotation stopper unit 27 is provided at a plurality of locations in the peripheral portion of each pocket 21 of the upper star wheel 24, and is provided at three locations in the present embodiment.
As shown in FIGS. 1 and 2, the anti-rotation unit 27 includes a main body portion 27a and an anti-rotation blade portion 27b provided on the upper surface thereof. The rotation stop blade part 27b is formed in a straight line shape and protrudes with the blade edge facing upward.

The rotation prevention unit 27 is configured such that the rotation prevention blade portion 27 b is engaged with the lower surface 5 c of the flange portion 5 b provided in the container 5 accommodated in the pocket 21 to prevent the rotation of the container 5. .
As shown in FIG. 1, the rotation stop blade portion 27b is disposed so as to be inclined such that the front end portion 27c is located on the side opposite to the cap screwing direction R from the rear end portion 27d.

As shown in FIG. 4, when the distance from the rear end portion 27d of the rotation prevention blade portion 27b to the central axis of the container 5 is equal to or less than the radius F of the flange portion 5b, the rotation prevention blade portion 27b in the present embodiment The portion 27d is provided so as to be inclined with respect to the radial direction D of the container 5.
The inclination angle B of the rotation stop blade portion 27b can be arbitrarily set depending on the arrangement of the front end portion 27c and the rear end portion 27d of the rotation stop blade portion 27b, and this angle B is 5 to 30 °, preferably 10 to 20 °. If it is the range, the rotation stop blade part 27b is reliably latched by the lower surface 5c of the flange part 5b.
When this angle B is smaller than 5 ° or larger than 30 °, the effect of locking the rotation-stopping blade portion 27b to the flange portion 5b is reduced.

  The spinning headset 3 is provided above the upper star wheel 24, moves up and down by a moving mechanism (not shown), and is screwed by rotating the cap 6 in the screwing direction. The spinning head set 3 includes a spinning head 31 having a chuck mechanism 31 a that holds the cap 6.

In the cap mounting apparatus 1 having the above-described configuration, the neck 5 f of the container 5 is accommodated in the pocket 21 provided in the upper star wheel 24 of the center star 2.
The container 5 is suspended and held by the flange portion 5 b being supported on the peripheral edge portion of the pocket 21 formed in the upper star wheel 24.

  Next, the spinning headset 3 is lowered by a moving mechanism (not shown). The spinning head 31 is rotated by a motor (not shown), and is screwed into the container 5 by rotating the cap 6 held by the chuck mechanism 31a.

At this time, when the cap 6 is rotated in the screwing direction by the spinning headset 3, a rotational force is also applied to the container 5 in the same direction as the screwing direction of the cap 6. For this reason, the force of the said screwing direction is added with respect to the rotation stop blade part 27b from the lower surface 5c of the flange part 5b provided in the container 5. FIG.
As described above, the rotation stop blade portion 27b is inclined with respect to the radial direction D.
For this reason, a component force acts on the rotation stop blade portion 27b not only in a direction perpendicular to the rotation stop blade portion 27b but also in a direction along the formation direction of the rotation stop blade portion 27b.
As a result, the locking state of the flange portion 5b to the lower surface 5c by the rotation stopper blade portion 27b becomes more reliable, the container 5 is held in a suspended state without rotating in the pocket 21, and the cap 6 is held in the container 5 Are securely screwed.

  Here, if the angle B with respect to the radial direction D of the rotation stop blade portion 27b is within a range of 5 to 30 °, the rotation stop blade portion 27b is more reliably locked to the lower surface 5c of the flange portion 5b. Thus, the container 5 is reliably held in a suspended state without rotating in the pocket 21.

In the cap mounting device 1 described above, the distance from the rear end portion 27d of the rotation stop blade portion 27b to the central axis of the container 5 is equal to or less than the radius F of the flange portion 5b.
For this reason, as the inclination angle of the rotation stop blade portion 27b, the angle between the rotation stop blade portion 27d and the radial direction D at the rear end portion 27d is given.

  As shown in FIG. 5, when the distance from the rear end portion 27d of the rotation stopper blade portion 27b to the central axis of the container 5 is larger than the radius F of the flange portion 5b, the rotation stopper blade portion 27b and the flange portion 5b are outside. It is preferable that the angle C with respect to the radial direction D of the rotation stop blade portion 27b at the intersection E with the peripheral edge 5e is within a range of 5 to 30 °.

  With the above-described configuration, the locking state of the rotation stop blade portion 27b to the lower surface 5c of the flange portion 5b becomes more reliable, the container 5 is held in a suspended state without rotating in the pocket 21, and the cap 6 is It is securely screwed onto the container 5.

As described above, according to the cap mounting device 1 according to the present invention, the anti-rotation blade portion 27b abuts on the lower surface 5c of the flange portion 5b, and the cutting edge of the anti-rotation blade portion 27b formed in a linear shape is provided. The container 5 is configured to be inclined with respect to the radial direction D.
In the configuration of the conventional cap mounting device, the rotation stopper blade portion is formed along the radial direction of the container. Therefore, when a rotational force is generated in the container, only from the direction perpendicular to the direction of formation of the rotation stopper blade portion. A rotational force is applied. In this case, there is a problem that slippage is likely to occur between the lower surface of the flange portion and the rotation-preventing blade portion because the force with which the rotation-stopping blade portion is engaged with the lower surface of the flange portion acts only in one direction.
According to the cap mounting device 1 according to the present invention, when the cap 6 is screwed to the container 5 due to the inclined arrangement of the rotation prevention blade portion 27b, the force applied to the rotation prevention blade portion 27b is the rotation prevention blade portion. The component force acts not only in the direction perpendicular to 27b but also in the direction along the direction of formation of the rotation stop blade portion 27b.
As a result, the locking state of the rotation stop blade portion 27b to the lower surface 5c of the flange portion 5b becomes more reliable, the container 5 is held in a suspended state without rotating in the pocket 21, and the cap 6 is held in the container. 5 is securely screwed.
Furthermore, if the angle of inclination of the rotation-stopping blade portion 27b shown in FIGS. 4 and 5 is 5 to 30 °, the container 5 can be more reliably prevented from rotating, and a problem that occurs when the cap 6 is mounted can be prevented. It can be greatly reduced.

It is a top view which shows the suspension mechanism of the cap mounting apparatus which concerns on this invention. It is a side view which shows the suspension mechanism of the cap mounting apparatus which concerns on this invention. It is a side view which shows the cap mounting apparatus which concerns on this invention. It is a fragmentary figure which shows the rotation stop blade part of the cap mounting apparatus which concerns on this invention. It is a fragmentary figure which shows the rotation stop blade part of the cap mounting apparatus which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Cap mounting apparatus, 21 ... Pocket (suspension mechanism), 27 ... Anti-rotation unit, 27b ... Anti-rotation blade part, 27c ... Front end part, 27d ... Rear end part, 3 ... Spinning headset (cap screwing mechanism) 5 ... Container, 5b ... Flange, 5c ... Lower surface, 5e ... Outer edge, 5f ... Neck, 6 ... Pre-screw cap (cap)

Claims (3)

A suspension mechanism for holding a container in which a threaded portion is formed in a mouth portion and a flange portion is formed in a neck portion in a suspended state by supporting the flange portion;
A cap screwing mechanism for screwing a pre-screw cap onto the mouth of the container held by the suspension mechanism;
A cap mounting device comprising: a rotation stop unit provided in the suspension mechanism and formed with a rotation stop blade portion that is locked to the lower surface of the flange portion of the container and prevents the rotation of the container in the cap screwing direction. ,
The rotation stop blade portion is formed in a straight line, and the formation direction of the front end portion of the rotation stop blade portion is opposite to the cap screwing direction than the rear end portion with respect to the radial direction of the container. A cap mounting device, wherein the cap mounting device is inclined so as to be positioned on the side. The distance from the rear end portion of the rotation stop blade portion to the container center axis is equal to or less than the radius of the flange portion,
The cap mounting device according to claim 1, wherein an inclination angle of the rotation stop blade portion with respect to a radial direction of the container is set to 5 to 30 ° at a rear end portion of the rotation stop blade portion. The distance from the rear end portion of the rotation stop blade portion to the container central axis is larger than the radius of the flange portion,
The cap mounting device according to claim 1, wherein an inclination angle of the rotation stop blade portion with respect to a radial direction of the container is set to 5 to 30 ° at an intersection of the rotation stop blade portion and the outer peripheral edge of the flange portion.

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