JPH074238Y2 - Screw cap capper - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cap of a screw cap, and more particularly, to a cap inner surface and a picker when a screw cap held by a picker is transferred to a cap holding device. The present invention relates to a cap of a screw cap that prevents the outer surface of the receiving part of the item from being worn or damaged.

(Prior Art) Conventionally, as this type of picker, a cap receiving portion is fixed to the tip of a holder (see Japanese Patent Laid-Open No. 60-172691). Further, a movable plate having a cap receiving portion fixed thereto (see Japanese Patent Application Laid-Open No. 63-138997) has been conventionally known. Further, since these conventionally rotate the entire cap holding device with one motor, it is very difficult to stop the rotation when gripping the cap.

This can be solved by using a servo motor. However, the servo motor itself is expensive, and using the servo motor only to solve the problem of preventing this wear actually increases the cost,
The current situation is that it is impossible to adopt. In view of these circumstances, an inexpensive product having a simple structure has been developed.

(Problems to be solved by the present invention) However, in the above-mentioned conventional technique, the cap receiving portion of the picker has a fixed (bolt-fastened) structure, and when the cap is held by the cap holding device, the cap is held by the cap holding device. Although it rotates in the same direction as the rotation at the same number of rotations, since the cap receiving part of the picker is fixed, the inner surface of the cap and the outer surface of the cap receiving part of the picker are rubbed and abrasion powder is generated, resulting in damage. There was a problem that many cases occurred. Further, the centering of the cap is not perfect and there is a problem that rubbing is increased.

In view of this point, the present invention eliminates rubbing on the inner surface of the cap and the outer surface of the cap receiving portion of the picker with a simple structure, eliminates the generation of wear debris, and at the same time makes the cap centering more reliable. It is intended to provide.

(Means for Solving the Problem) The present invention has achieved the above-mentioned problem by providing a free roller that freely rotates the cap receiving portion of the picker. Furthermore, as a concrete embodiment, a picker for conveying the cap and a cap holding device for holding the screw type cap from the picker are provided, and the cap held by the cap holding device is screwed into the mouth portion of the container. In the capper configured as described above, the picker may be a screw cap capper in which a fulcrum pin fixed to the tip of the holder is provided with a rotatable free roller having a tapered receiving surface of the cap.

(Operation) By adopting the above-described configuration, the present invention has a simple configuration, so that the cap held by the cap holding device and the rotatable cap receiving portion of the picker rotate together,
Relative rubbing was eliminated, and the inner surface of the cap and the outer surface of the cap receiving portion of the picker were not rubbed, and it was possible to eliminate the generation of abrasion powder.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings.

In transferring the cap (3) from the picker (1) transferred around a certain rotation center to the cap holding device (2) transferred around another rotation center as shown in FIG. The capper is provided with a free roller (5) so that the cap receiving portion (4) of (1) can be freely rotated.

First, a conventional capper will be described with reference to FIG. Each part of the picker (1) will be described in detail. As one example, a star wheel that is supplied into the rotating body of the rotary capper is provided with the picker (1) via a holder (6), and the picker (1) serves as a cap. (3) is conveyed on a circular locus, and is provided on the rotating body to provide a picker (1).
The cap (3) is transferred to a cap holding device (2) which is conveyed on a circular locus about a rotation center different from the above, and the cap (3) held by the cap holding device (2) is attached to the star wheel. There is known a capper adapted to be screwed into a container supplied from U.S.A. In a capper having this type of configuration, the cap receiving portion (7) of the picker (1) is fixed. Therefore, in the chuck of the cap holding device (2) that moves up and down while rotating, when the chuck holds the cap (3), the cap (3) is also rotated at substantially the same number of rotations as the chuck. However, the cap receiving part (7) of the picker (1)
Is fixed, the inner surface of the cap and the outer surface of the cap receiving portion (7) are rubbed to generate abrasion powder, resulting in the picker (1).
There was a serious problem that wear powder adhered to the cap receiving portion (7) and the centering of the cap was deteriorated, and accurate capping became impossible, and at the same time the cap itself was worn and damaged.

In view of the above circumstances, the present invention has improved the cap receiving portion (4) of the picker (1) so that it can rotate freely, and solved the above problems. The structure and operation are basically the same as those of the conventionally known capper of this type, and the container conveyed by the conveyor is synchronized with the capper by the timing screw, and then the star is moved to the supply side. It is introduced into the rotating body of the capper by the wheel and is fixed to the rotating body by the container holding mechanism.
On the other hand, the cap to be capped in the container is transferred from the chute to the picker (1) provided on the star wheel and transferred by the picker (1). The rotating body is provided with a cap holding device (2) at a position directly above each container fixed by the container holding mechanism. The cap holding device (2) is provided on the rotating body so as to be movable up and down. It revolves around the center of rotation of the rotating body and rotates about its own axis. The cap holding device (2) holds the cap (3) conveyed by the picker (1) at the cap transfer section (4),
The cap (3) gripped by the rotation and lowering of the cap holding device (2) is screwed into the mouth of the container.

When the cap holding device (2) screws the cap (3) to the mouth of the container, the cap holding device (2) releases the grip of the cap (3) and the cap holding device (2) rises. When the holding of the container by the container holding mechanism is released, the container provided with the cap (3) is discharged onto the conveyor by the star wheel on the discharge side. However, in this embodiment, as shown in FIG. 1, a fulcrum pin (8) that rotatably supports the free roller (5) at the tips of a plurality of holders (6) attached to the rotating star wheel. And a free roller (5) made of, for example, synthetic resin having a low coefficient of friction fitted in the fulcrum pin (8) is provided, and the cap (3) is further provided.
The receiving surface portion (9) corresponding to the opening end portion of is tapered. The fulcrum pin (8) may be a solid shaft-like member that can rotatably support the free roller (5), and the cap receiving portion (4) may be a synthetic resin free roller (5). Needless to say, it may be made of a steel material such as stainless steel, and may be rotatable via a bearing in the rotating part with the fulcrum pin (8). In order to improve the centering when receiving the cap (3), the centering is ensured by forming a taper on the surface that receives the cap opening end.
This is the same as the rotation of the cap holding device (2) at the same time that the cap holding device (2) that rises and falls while rotating holds the cap (3) without repairing, and at the same time, the cap receiving portion of the picker (1). Since the roller is rotated via the free roller (5) of (4), there is no rubbing portion, and the inner surface of the cap and the free roller (5) of the cap receiving portion (4) are removed.
The outer surface can prevent the rubbing phenomenon and the generation of abrasion powder.

Further, in addition to the reciprocating operation member provided so as to be able to move back and forth, the driving means is interlocked to enable reciprocating driving, and also in the capper provided with the picker on the reciprocating operation member, similarly to the above, in the cap receiving portion of the picker. By providing the rotatable free roller, it is possible to solve the above-mentioned problem by eliminating the abrasion between the inner surface of the cap and the outer surface of the cap receiving portion of the cap holding device due to rubbing with a very simple structure.

(Effects of the Invention) The present invention can obtain the following effects based on the above configuration.

(1) The rubbing phenomenon between the inner surface of the cap and the outer surface of the cap receiving portion of the picker is eliminated, and as a result, generation of abrasion powder is eliminated.

(2) Since the above-mentioned wear is eliminated, the positioning becomes accurate and it is possible to cope with the speedup.

(3) Since the free roller has a taper formed on the receiving surface at the opening end of the cap, the centering of the cap can be accurately performed, and the synergistic effect of preventing abrasion between the inner surface of the cap and the outer surface of the cap receiving portion results in high speed. It has become possible to deal with this.

[Brief description of drawings]

FIG. 1 is a schematic partial cross-sectional explanatory view in which a cap receiving portion of a picker in a rotary capper according to an embodiment of the present invention is rotatable, and FIG. 2 is a picker cap in a conventional rotary capper. It is a schematic partial cross-section explanatory drawing which made the receiving part the fixed type. (1) …… Picker, (2) …… Cap holding device,
(3) …… Cap, (4) …… Picker cap receiving part, (5) …… Free roller, (6) …… Holder,
(7) ... fixed cap receiving part of picker, (8) ...
Fulcrum pin, (9) ... receiving surface,

Claims (1)

[Scope of utility model registration request] 1. A capper comprising a picker for transporting a cap and a cap holding device for holding a screw type cap from the picker, wherein the cap held by the cap holding device is screwed into an opening of a container. In the capper of the screw cap, the picker has a fulcrum pin fixed to the tip of the holder, and a rotatable free roller having a tapered receiving surface of the cap.