JPS6356155B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a take-up reel comprising an elongated hollow core with flanges at both ends.

Such take-up reels are widely used for storing and transporting, for example, paper, electrical wiring strips, and the like.

Some of these take-up reels have a core made of wood or both and a circular flange made of wood, such as chipboard, but these reels have the drawbacks of being relatively expensive to manufacture and being heavy and difficult to handle.

There are also reels whose flanges are made of cardboard to reduce manufacturing costs and weight, but in this case, the flange is easily damaged and bends easily.

The take-up reel of the present invention has flanges at both ends and has an elongated hollow core inside.The flanges at both ends are made of double-sided corrugated cardboard, and each flange shape has four straight sides and an outwardly bulging curve. It is an octagon with four sides arranged alternately, two opposite sides of the four straight sides are parallel, and the waveform of the double-sided cardboard forming the flange is parallel to the four straight sides. It is characterized by each angle formed by 45 degrees.

The take-up reel according to the present invention uses relatively inexpensive and lightweight double-sided corrugated cardboard as the flange material, and has a special octagonal shape that defines the corrugated direction of the corrugated cardboard, so it is not damaged by compressive force in the direction perpendicular to the core. can be minimized. When the take-up reel is placed horizontally (with the flange facing vertically), one of the four straight sides will be the bottom side, so
When a vertical force is applied to the outer circumference of the flange, the corrugated direction of the corrugated board always makes an angle of 45° with the direction of the vertical force,
Damage to the flange due to this force can be minimized.

Preferably, each flange is provided with a continuous score on one or both sides extending around the core to strengthen the flange against bending.

Embodiments of the present invention will be described below based on the drawings.

In the conventional example shown in FIGS. 1 and 2, the take-up reel consists of an inner core 1 made of metal with an elongated hollow interior and an outer core made of a chipboard tube concentrically with an elongated hollow interior. 2, and two chipboard circular flanges 3, 3 at each end.

Although such conventional take-up reels are strong, they have the drawbacks of being expensive and heavy.

3, 4 and 5 show an embodiment according to the present invention, in which the take-up reel has an inner core 10 made of an elongated hollow chipboard tube, and an inner core 10 concentric with the inner core 10. It consists of an outer core 20 made of an elongated hollow chipboard tube and two double-sided corrugated cardboard flanges 30, 30 at each end. Each flange 30, 30 has an 8-sided shape in which four sides 31 made of straight lines and four sides 32 made of outwardly bulging curves are alternately arranged. The two opposite sides of the four straight sides 31 are parallel, and the sides are arranged so that the shape formed by extending these four straight sides 31 until they intersect is a square.

As shown in FIG. 5, the angle formed by the direction of the corrugated cardboard 33 of each flange 30 and the straight line side 31 of the flange 30 is 45 degrees, and when the take-up reel is placed as shown in the figure, it always lies in a straight line. consisting of 4
One of the sides will be the bottom side, so the flange 30
The flange strength can be increased when a vertical force (force acting from top to bottom in Figure 5) is applied from above.

In the embodiment of the invention shown in FIG. 6, a series of notches 34, preferably circular notches, are provided on one or both sides of each flange 30, 30 to strengthen the flange against bending.

[Brief explanation of the drawing]

1 and 2 are a side view and a sectional view, respectively, of an embodiment of a conventional take-up reel, and FIGS. 3 and 4 are a side view and a sectional view, respectively, of an embodiment of a take-up reel of the present invention. , FIG. 5 is a side view showing the inside of the flange of the take-up reel shown in FIGS. 3 and 4, and FIG. 6 is a side view showing another embodiment of the take-up reel of the present invention. 1, 10...Inner core, 2,20...Outer core,
3, 30... Circular flange, 31... Straight side, 31a... Lower side, 32... Curved side, 33... Waveform, 34... Notch.

Claims (1)

[Scope of Claims] 1. A take-up reel consisting of a core with flanges at both ends and an elongated hollow interior, wherein the flanges at both ends are made of double-sided corrugated cardboard, and the flange shape at both ends has four straight sides and an outer core. It is an octagonal shape in which four sides consisting of curved lines that bulge out are arranged alternately, two opposite sides of the four straight sides are parallel, and the corrugated cardboard of the flanges at both ends are parallel to each other. A take-up reel characterized in that the angles formed with each of the four sides are 45 degrees. 2. The take-up reel of claim 1, wherein each of said flanges has a continuous notch extending around said core on one or both sides of each flange.