JP2556823B2 - Logistics reel - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical drum body and a pair of front and rear flange bodies joined to both ends of the drum body.
A disk that fills the inside of the drum, a shaft hole formed in the center of the disk, and a dome that serves as a molding gate on the disk. ,
Used to wind and transport a flexible long object such as a chain, pass the spindle through the shaft hole in the center of the actual product, and use it to unwind the long object one after another. The present invention relates to distribution reels.

[0002]

2. Description of the Related Art Generally, a distribution reel is usually injection-molded from a synthetic resin material. Ideally, in this injection-molded distribution reel, the pair of front and rear flange bodies are in a plane-parallel shape, there is no protrusion on the outside of the drum body, and the whole is lightweight. Therefore, in molding a distribution reel made of a synthetic resin material, it is designed to have a uniform thickness as a whole in order to eliminate partial shrinkage, and is put to practical use. For example, it has been proved that a physical distribution reel having an outer diameter of 180 mm can sufficiently withstand use if the flange has a thickness of about 0.7 mm.

By the way, conventionally, this type of physical distribution reel has a pair of front and rear flange bodies 23 and 24, and a drum provided in an intermediate portion sandwiched between the flange bodies, as shown in FIGS. 7 and 8. A body 22, a disc 25 extending from the drum body toward the center, a shaft hole 26 formed in the center of the disc, and a dome body 27 serving as a gate for injection molding on the upper surface of the disc. It consists of

In injection molding, the lower mold 28, the upper mold 29 and the left and right molds 30, 31 are combined to form the upper mold 2.
The contact resin is press-fitted into the dome body 27 serving as the gate opening from above 9, and the outer diameter of the left and right flange bodies is 180 mm,
The flange body, the drum body, and the disc were formed with a thickness of 0.7 mm.

[0005]

In this thin-wall molding,
Since the molten resin material does not reach the tip of the flange body, the injection pressure will be raised and it will be due to excessive high pressure, but with this excessive injection pressure, the mold as a whole will open slightly around the disc, There is a problem that the thickness is thicker than a predetermined thickness, more than a predetermined amount of molten material is required, and a desired thin-walled distribution reel cannot be obtained. Also, if the mold is closed under high pressure so that it will not open, the fluidity of the resin will deteriorate and it will be difficult for the resin to reach the outer peripheral edge of the flange body with sufficient pressure, resulting in defective products.
There is a problem that molding takes time and leads to high cost. Therefore, in view of such problems, an object of the present invention is to provide a logistics reel having a predetermined thin wall without requiring a material more than planned.

[0006]

Means for Solving the Problems A physical distribution reel of the present invention for achieving the above object is a cylindrical drum body that serves as a winding shaft for a long product, and a front and rear pair coupled to both ends of the drum body. A large-diameter flange body, a disc that fills the inside of the drum body, a shaft hole formed in the center of the disc body, and a dome body that projects above the disc. A distribution reel in which the drum body, the flange body, and the disk are integrally molded with a synthetic resin material in a substantially uniform thin thickness as a molding gate, and a circle extending from the dome body to the drum body. The structure is such that a thick flow promoting portion is provided on the plate. In the distribution reel of the present invention, a cylindrical drum body serving as a winding shaft for a long product, a pair of front and rear large-diameter flange bodies coupled to both ends of the drum body, and the drum are provided. It has a disc that fills the inside of the body, a shaft hole formed in the center of the disc, and a dome body that projects above the disc. The dome body is used as a molding gate, and a synthetic resin material is used. In the distribution reel in which the drum body, the flange body, and the disc are integrally formed, a drum body and a flange body having a thin thickness, in which only the thickness of the disc provided with the dome body is substantially uniform, It has a slightly thicker structure than that of.

[0008]

According to the present invention having such a structure, the flow of the molten resin material at the time of injection molding is accelerated along the disk provided with the dome body, and a large amount of the resin is transferred in the outer peripheral direction in a short time. It is not necessary to raise the injection pressure excessively in order to reach the tip of the flange body sufficiently. Therefore, since a high injection pressure is not required and the mold does not open, it is possible to quickly form a predetermined thin distribution reel. Also, since the disc will be reinforced,
It can also be strong.

[0009]

1 to 4 show a distribution reel 1 obtained by the present invention, which is a cylindrical drum body 2 serving as a winding shaft for a long product, and integrally formed at both ends of the drum body. A pair of front and rear large-diameter flange bodies 3 and 4 that are joined together, a thin disk 5 that fills the inner diameter side of the drum body, a shaft hole 6 formed in the center of the disk, and the disk. The dome body 7 projects upward and serves as a gate for injection molding, and a flow promoting portion 8 extending from the dome body to the drum body 2.

The pair of front and rear flange bodies 3 and 4 are made of a synthetic resin material and are thin and parallel to each other and formed in a flat plate shape. As shown in FIG. 1, the front flange body 3 is connected to the drum body 2 by four arms 9 and 9, and fan-shaped window holes 10 and 10 are provided between the adjacent arms. On the other hand, the rear flange body 4 has two small small arms 11 and 11 as shown in FIG. 3, and small window holes 12 and 12 are formed above and below the small arm 11. In addition, reference numeral 13 in the drawing is a slit formed in the width direction of the drum body for inserting and locking the tip end of the wound object, and a slit hole formed at the end of the slit up to the disc 5. Is.

The pair of front and rear flange bodies 3 and 4 may have the same front and rear shape as long as they are parallel and flat. As shown in FIG. 4, the drum body 2 has two flange bodies 3,
It is provided in the middle part sandwiched by 4 and has both flange bodies 3, 4
Is formed to have a thickness equal to that of the. This drum body 2
The outer side 2a has a flat surface with no irregularities so that the long object can be wound smoothly.

The disk 5 filling the inner diameter side of the drum body 2 is shown in FIG.
As shown in FIG. 3, a shaft hole 6 is formed in the center of the shaft for passing a support shaft and winding or winding the long product. The disk 5 of this embodiment is formed in the substantially middle portion of the drum body 2 so that the position of the drum body 2 is symmetrical in the front-rear direction, and has a thickness equal to the thickness of the flange bodies 3 and 4 and the drum body 2. Has been formed. The formation position of the disc 5 is not limited to the intermediate position of the drum body 2, but may be formed deviated by one side.

At the time of injection molding, the circular plate 5 has projecting dome bodies 7, 7 which serve as injection gate openings for the molten resin material, and the inner surface side 2b of the dome bodies 7, 7 and the drum body 2 are projected.
A thick flow promoting portion 8 is formed which communicates with.
This flow promoting portion 8 is thicker than the thickness of the circular plate 5, and the molten resin material press-fitted from the dome body 7 during injection molding is used for the drum body 2.
It is possible to supply a large amount in a short time. In this embodiment, the flow promoting portion 8 is shown as being formed so as to project only on one side of the disc 5 as shown in FIG. 2, but in FIG. You may form it.

Thus, the physical distribution reel 1 in the embodiment.
The size of depends on the shape, wall thickness, etc. of the elongated object and its unit length (length for winding), but the size of the flange body is about 180 mm in diameter and 0.7 mm in wall thickness. Naturally, there are those with a size smaller than this or larger than this.

The second embodiment shown in FIGS. 5 and 6 is a disk 5
The overall wall thickness is thicker than that of the drum body 2 and the flange bodies 3 and 4. Needless to say, in this case, the molten resin material from the dome body 7 during injection molding is easily supplied in the entire circumferential direction in a short time, and the drum body 2 can be sufficiently reinforced. The disk 5 of the second embodiment is formed at a position deviated to one side of the front and rear flange bodies 3 and 4, but of course the intermediate portion of the drum body 2 as in the first embodiment. You may form in.

[0016]

As is apparent from the above description, the distribution reel of the present invention has a disk-shaped dome body and a drum body,
Form a pair of flange body and drum body with uniform thin wall,
A dome body, which serves as a gate port for injecting the molten resin material, is provided on the disc formed on the inner diameter side of the drum body, and the molten resin material can be easily formed in a short time during injection molding from the dome body toward the outer peripheral direction. Since the molten resin flows smoothly to the thin flange body and drum body without stagnation, it is not necessary to increase the injection pressure greatly, and it is possible to use the thin mold as specified by the mold. There is an effect that a thick molded product can be easily obtained in a short time. That is, since the flowability of the molten resin in the outer peripheral direction is improved, it is possible to significantly reduce the occurrence rate of the defective resin or the resin reaching the outer peripheral edge of the flange body with sufficient pressure, and to shorten the molding time. There is an effect that can be done. As a result, it is possible to greatly reduce the cost. Further, in the case where the entire disc is made slightly thick, the disc is reinforced and the drum body becomes strong in strength.

[Brief description of drawings]

FIG. 1 is an overall front view showing a first embodiment.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is an overall rear view showing the first embodiment.

FIG. 4 is an enlarged vertical sectional view of the central portion of the flange body of the first embodiment.

FIG. 5 is an overall front view showing another embodiment.

6 is a sectional view taken along line BB of FIG.

FIG. 7 is an overall front view showing a conventional structure.

FIG. 8 is a sectional view showing a state of molding by a conventional mold.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Logistics reel 2 ... Drum body 3 ... Front flange body 4 ... Rear flange body 5 ... Disk 6 ... Shaft hole 7 ... Dome body 8 ... Flow promoting section

Claims (2)

(57) [Claims] 1. A cylindrical drum body (2) as a winding shaft for a long product, and a pair of front and rear large-diameter flange bodies (3), (4) coupled to both ends of the drum body. A dome having a disc (5) for filling the inner diameter side of the drum body, a shaft hole (6) formed in the center of the disc, and a dome body (7) protruding above the disc. Using the body (7) as a molding gate, the drum body (2), the flange bodies (3), (4) and the disc (5) are integrally molded with a synthetic resin material with a substantially uniform thin thickness. A physical distribution reel, characterized in that a thick flow promoting portion (8) is provided on the disc (5) extending from the dome body (7) to the drum body (2). reel. 2. A cylindrical drum body (2) serving as a shaft for winding a long product, and a pair of front and rear large-diameter flange bodies (3), (4) connected to both ends of the drum body. A disk (5) for filling the inner diameter side of the drum body, a shaft hole (6) formed in the center of the disk, and a dome body (7) protruding above the disk, A distribution reel in which the dome body (7) is used as a molding gate and the drum body (2), the flange bodies (3), (4) and the disc (5) are integrally molded with a synthetic resin material. In addition, only the thickness of the disc (5) provided with the dome body (7) is thicker than that of the drum body (2) and the flange bodies (3) and (4) having a substantially uniform thin thickness. A logistics reel that has been characterized.