JP3411875B2 - Mandrel - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates], at the time of mounting the tubular film to be used as a display label such as a bottle, to a mandrel for expanding a is Oriawa the flat film into a cylindrical shape.

[0002]

2. Description of the Related Art FIG. 10 is a schematic view of a film loading apparatus. The tubular film is a film roll 20 which is formed by winding a flat long film. The film pulled out from the film roll 20 is a cutter 2
After being cut to a predetermined length with No. 1, it travels between a pair of belts 22. At that time, it is sucked by a vacuum head 23 arranged on the back surface of the belt 22 and opened to some extent, and then the upper part of the mandrel 11 is opened. And is passed over the outside of the mandrel 11 by a pair of belts 24. At this time, the film F is expanded by the mandrel 11 and expanded into a cylindrical shape. The film that has passed through the mandrel 11 falls and is fitted onto the body of the bottle 10 below. Thereafter, the film F is shrunk by heating the bottle and the film, and the film F is brought into close contact with the outer surface of the bottle 10.

As shown in FIGS. 5 to 7, a conventional mandrel 11 has a cylindrical shape, and notched slopes 12 are formed on both left and right side surfaces of the upper part, so that the upper part has a tapered shape in a front view. ing. A large number of rollers 13 are provided on both left and right side surfaces so that the film F can smoothly pass outside the mandrel.

[0004]

When the film F passes through the outside of the mandrel 11, the film F is expanded into a cylindrical shape as shown in FIG. However, since the outer diameter of the mandrel 11 is set to be slightly smaller than the diameter of the film 11, the fold line 30 of the film F is not sufficiently extended. Therefore, as shown in FIG. 9, the film F has a considerably distorted cylindrical shape even after passing through the mandrel 11, and its minor axis L is slightly smaller than the outer diameter of the bottle, and even if it falls from above the bottle. , It may get caught on the bottle shoulder without being completely fitted onto the bottle body. This tendency is as shown in FIG.
It becomes particularly large when 0. When the film is caught, it is necessary to stop the loading device and remove not only the bottle on which the film is caught but also the preheated bottle, resulting in a great loss of work.

If the diameter of the mandrel is simply increased in order to extend the fold line of the film, the film is caught by the mandrel and does not flow smoothly. Further, if the diameter of the film is increased, there is a problem that the film is likely to be wrinkled when it is contracted and brought into close contact with the bottle, which cannot be adopted.

The present invention has been made for the purpose of solving the above problems, and provides a mandrel capable of extending the folds of the film when the film passes through the mandrel and making it difficult for the film to be caught in the bottle. It is a thing.

The present invention mounts a tubular film on a bottle.
When the flat film is folded, it is expanded into a cylindrical shape.
It is a mandrel that has a notched slope on both left and right sides of the upper part of the cylindrical main body, so that the upper part is tapered in the front shape and the folds of the film on the front and back sides of the cylindrical main body pass through. a protrusion provided in a portion, the
The shape of the protrusion is a vertically long strip, and the upper and lower ends of the protrusion are
The mandrel is characterized in that a tapered portion is formed on the.

When the film F passes through the mandrel,
As shown in FIG. 4, since the fold line is extended by the protrusion of the mandrel, the shape of the film F that has passed through the mandrel is close to a cylindrical shape, and it is difficult for the film F to be caught by the bottle.

If the shape of the protrusion is a vertically long strip, the film can pass smoothly without being caught by the mandrel. If the upper end and the lower end of the protrusion are formed with taper portions, it becomes more difficult to be caught. If the position (height) of the protrusion is provided at the height near the lower end of the notched slope,
The film is hard to get caught, and the effect of extending the folds of the film is great. It is preferable that the lower end of the vertically long strip-shaped protrusion is near the height of the lower end of the notched slope. It is preferable to provide a tapered portion on the protrusion so that the upper end of the tapered portion at the lower end is substantially at the height of the lower end of the notched slope.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below based on Examples. 1-3 are related to the mandrel 1 of the embodiment, FIG. 1 is a front view, FIG. 2 is a side view, and FIG. 3 is a plan view. The mandrel 1 has a cylindrical shape, and the cutout slopes 2 are formed on the left and right side surfaces of the upper part of the mandrel 1, so that a front view (FIG. 1).
In, the upper part is tapered. A large number of rollers 3 are provided on the left and right side surfaces so that the film F can smoothly pass outside the mandrel.
Such a shape is exactly the same as that of the conventional mandrel 11. A characteristic of the mandrel 1 is that the protrusions 4 are provided on the front side and the back side of the tubular body at the portions where the folds of the film pass. The protruding portion 4 has a vertically long strip shape, and the upper and lower ends thereof are tapered portions 5 and 6 so that the film can smoothly pass therethrough. Lower end taper 6
The upper end of is substantially the height H of the lower end of the notched slope 2. By doing so, when the film passes through the height of the lower end of the notched slope 2, the protrusion 4 extends the fold line 30 of the film for a moment, as shown in FIG.
The resistance of the film to the mandrel is minimized while maintaining the effect of extending the folds, and the film is less likely to be caught by the mandrel.

The thickness (protrusion amount) and the width of the protrusion may be appropriately determined in consideration of the diameter of the mandrel and the diameter of the film. In the case of this embodiment, the thickness (protrusion amount) is The width is 4 mm and the width is 14 mm.

The mandrel 1 is used by being attached to a conventional film mounting apparatus as shown in FIG. 10 just like the conventional mandrel 11. As a result of mounting the conventional mandrel 11 to the film mounting device and mounting the film on the bottle having the shape shown in FIG. 11, the film F is frequently caught on the bottle 10 and the operating rate of the device is 35 to 6
Although it was 5%, when the mandrel 1 of the example was used,
The film F was hardly caught on the bottle 10, and the operating rate of the apparatus was 90% or more, and the working efficiency was significantly improved.

The mandrel of the present invention can be easily manufactured by modifying the conventional mandrel since only the protrusion is attached to the conventional mandrel.

[0014]

Since the mandrel of the present invention extends the folds of the film and prevents the film from being caught by the bottle, the operating rate of the film loading apparatus can be increased and the film loading work efficiency can be remarkably improved. Further, the mandrel of the present invention can be easily manufactured by modifying the conventional mandrel.

[Brief description of drawings]

FIG. 1 is a front view of a mandrel 1 according to an embodiment.

FIG. 2 is a side view of the mandrel 1.

FIG. 3 is a plan view of the mandrel 1.

FIG. 4 is an explanatory diagram of a film F passing through the mandrel 1.

FIG. 5 is a front view of a conventional mandrel 11.

FIG. 6 is a side view of the mandrel 11.

FIG. 7 is a plan view of the mandrel 11.

FIG. 8 is an explanatory diagram of a film F passing through the mandrel 11.

FIG. 9 is an explanatory diagram of the film F that has passed through the mandrel 11.

FIG. 10 is a schematic view of a film loading device.

FIG. 11 is a front view of the bottle 10.

[Explanation of symbols]

1 Mandrel 2 Notched slope 3 roller 4 protrusion 5 Tapered part 6 taper part 10 bottles 11 Mandrel 12 Notched slope 13 Roller 20 film roll 21 cutter 22 belt 23 Vacuum head 24 belts 30 folds

Claims (2)

(57) [Claims] 1. A flat film when mounting a tubular film on a bottle.
A mand for expanding a film that has been folded into a cylinder into a cylindrical shape.
A notch on the left and right sides of the top of the cylindrical body
Due to the formation of the slope (2), the front shape is
The part is tapered, and the front side and the back side of the tubular body are
Provide a protrusion (4) on the part where the fold of the film passes.
Only, and the protrusion portion the shape of (4) and Vertical strip, said protrusion
A mandrel having tapered portions (5, 6) formed at the upper and lower ends of (4). 2. The mandrel according to claim 1 , wherein the height of the upper end of the taper portion at the lower end of the protrusion (4) is approximately the height (H) of the lower end of the notched slope (2). Mandrel