JPH0619182U - Tape reel - Google Patents

Abstract

(57) [Summary] [Purpose] The flange is free from warpage due to meat stealing, weight reduction and material saving are possible, and the same action as a conventional tape reel is obtained. [Structure] The upper and lower flanges 1 and 2 are thin-walled flange portions 1a and 2a in which the outer peripheral portions of the upper and lower flanges 2 are left by the same amount, respectively, to form thin-walled flange portions 1a and 2a.
The radial tape position regulating ribs 7 were formed on the flange surface where the tape of FIG.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tape reel such as a magnetic tape.

[0002]

[Prior art]

 FIG. 4 shows an example of a conventional tape reel, which comprises a reel hub 3 which also serves as a tape winding shaft, and parallel upper and lower flanges 1 and 2 attached to the reel hub 3, respectively. The edges of the tape wound around the reel hub 3 are position-regulated by the upper and lower flanges 1 and 2 and wound around the reel hub 3.

[0003]

[Problems to be solved by the device]

 By the way, if the purpose is to reduce the weight of the tape reel or to reduce the cost due to the reduction of materials, the above-mentioned figures are required, provided that the outer diameters of the upper and lower flanges 1 and 2 are the same as the present conditions. As shown in FIG. 4, it is conceivable to steal the wall thicknesses on both surface sides of the upper flange 1 and the lower flange 2, that is, on the upper surface of the upper flange 1 and on the lower surface of the lower flange 2.

However, if only the front surface side of the upper and lower flanges 1 and 2 is biased to steal the meat, a so-called warp occurs in which the flange bends to the back surface side where the meat is not stealed, as shown by a virtual line in FIG. It is considered that the cause of the warp of the flange is caused by the uneven shrinkage due to the cooling of the molded product after the injection molding of the reel, that is, the so-called uneven “sink phenomenon”.

Therefore, the warp of the flange toward the back surface causes surface wobbling when the reel is rotated, and the flange spacing between the upper and lower flanges 1 and 2 is narrowed, so that the edge portion of the tape wound around the reel hub 3 is reduced. Is pressed against the back surface of the flange, causing so-called tape edge damage.

The present invention has been made to solve the above-mentioned problems, and provides a tape reel that can reduce weight and material without causing warpage due to meat stealing in the reel flange. The purpose is to get.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the tape reel according to the present invention has an upper flange and a lower flange formed on a thin-walled flange by uniformly stealing the front and back flange surfaces of the reel in equal amounts. In addition, a plurality of radial tape position regulating ribs extending from the center of the reel toward the outer peripheral side are provided on the flange surface where the tape of the thin flange portion of the lower flange contacts.

[0008]

[Action]

 In the tape reel according to the present invention configured as described above, the front and back surfaces of the upper and lower flanges of the reel are formed as well-balanced, balanced-thickness flange surfaces, so that the reel can be molded by cooling after injection molding. Even if shrinkage, a so-called shrinkage phenomenon occurs, the flange does not warp, and therefore the flange does not wobble when the reel rotates, so there is no damage to the tape edge, and it is possible to reduce the weight and material of the reel. Become .

Further, since the radial tape position regulating ribs are provided on the rear surface side flange surfaces of the upper and lower flanges facing each other, the winding of the tape on the reel does not become uneven like the conventional tape reel. It can be done cleanly.

[0010]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a front view of the upper flange of the tape reel, FIG. 2 is a rear view of the upper flange, and FIG. 3 is a vertical cross-sectional view of the entire tape reel.

The tape reel is composed of an upper flange 1, a lower flange 2 and a reel hub 3. The lower flange 2 and the reel hub 3 are integrally formed, and the upper flange 1 is joined to the recess of the upper end of the reel hub 3 by press fitting or the like. A lower reel receiving shaft 4 is formed in the lower center of the lower flange 2, and a hub drive recess 5 is formed which penetrates the lower reel receiving shaft 4 and into which a hub drive shaft (not shown) is inserted.

Here, the upper flange 1 and the lower flange 2 will be described in detail. The upper flange 1 and the lower flange 2 are the same from the front and back sides so that the front and back flange surfaces leave the respective outer peripheral edge portions 6 a required width. The thin-walled flange portions 1a and 2a are obtained by uniformly stealing the pieces in quantity. That is, each of the flange portions 1a and 2a is formed so as to be located at the center of the thickness of the upper flange 1 and the lower flange 2 as shown in FIG.

[0013] Furthermore, a plurality of flanges on the rear surface side of the upper flange 1 and the lower flange 2, that is, the flange surfaces on the side where the tapes of the upper and lower flanges 1 and 2 are in contact, are radiated from the reel hub 3 side to the outer peripheral side. (Three in this example) tape position regulating ribs 7 are provided. The tape position regulating hub 7 is flush with the outer peripheral edge portions 6 of the upper and lower flanges 1 and 2, and therefore, the thin flange portions 1a and 2 on the back surfaces of the upper and lower flanges 1 and 2 are formed. The portion a has a fan shape as shown in FIG.

In the tape reel configured as described above, when the tape T is wound around the reel hub 3 as indicated by an imaginary line, the tape edge is on the upper and lower tapes on the rear surface of the lower flanges 1 and 2. The tape is regulated by the rib 7 for regulating the position of the tape, and the tape edge is wound in a neat state. Therefore, even if the upper and lower flanges 1 and 2 are thin-walled flange portions 1a and 2a, and the upper and lower flanges 1 and 2 have a flange surface spacing relatively wider than the tape width, By providing a plurality of radial tape position controlling hubs 7 on the back side of the tape, the tape is wound tightly on the reel hub as in the conventional tape reel.

Further, since the thin-walled flange portions 1a and 2a of the upper and lower flanges 1 and 2 are formed so as to be located at the centers of the thicknesses of the respective flanges, they are formed after injection molding of the tape reel. Even if the molded product shrinks due to cooling, that is, a sink phenomenon occurs, the flanges 1 and 2 are uniformly shrunk, so that the tape reel does not warp the flange. Therefore, when the tape reel rotates, the flanges 1 and 2 do not run out, and the tape edge does not hit the flange surface strongly, so that damage to the tape edge can be prevented. Further, by reducing the thickness of the upper and lower flanges 1 and 2, the weight of the tape reel can be reduced and the material can be saved.

Here, in some conventional tape reels, the flange portion has only the outer peripheral edge portion and a plurality of radial ribs and the other portion is opened. In order to obtain strength, the wall thickness must be made thicker, which causes a problem in weight reduction, but in the case of the present invention, the wall thickness of the tape reel outer peripheral edge portion 6 and the tape position regulating rib 7 is large. Needless to say, the tape reel can be made lighter as a whole because it has a normal thickness.

The present invention is not limited to the embodiments described above and shown in the drawings, and various modifications can be made without departing from the spirit of the invention. For example, in the embodiment, three tape position regulating ribs 7 are formed radially, but the number of ribs 7 is not limited. In addition, the tape reel can be widely applied to various tape reels for cassettes.

[0018]

[Effect of device]

 As described above, according to the present invention, since the front and back surfaces of the upper flange and the lower flange are equally thinly molded into a thin-walled flange portion, the molded product does not warp There is no run-out of the flange when the reel rotates and damage to the tape edge is eliminated. In addition, by reducing the thickness of the upper and lower flanges, the weight of the tape reel can be reduced and the molding material can be saved.

Further, by forming radial tape position restricting ribs on the flange-facing surfaces of the tape contact surfaces of the upper flange and the lower flange, there is no uneven winding of the tape on the tape reel. The quality of the tape reel is not compromised.

[Submission date] April 27, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

However, if only the front surface side of the upper and lower flanges 1 and 2 is biased to steal the meat, a so-called warp occurs in which the flange bends to the back surface side where the meat is not stealed, as shown by a virtual line in FIG. It is conceivable that the cause of the warp of the flange is caused by the uneven contraction of the molded product after the injection molding of the reel due to the cooling.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

The tape reel is composed of an upper flange 1, a lower flange 2 and a reel hub 3. The lower flange 2 and the reel hub 3 are integrally formed, and the upper flange 1 is joined to the recess at the upper end of the reel hub 3 by caulking or the like. A lower reel receiving shaft 4 is formed in the lower center of the lower flange 2, and a hub driving recess 5 is provided which penetrates the lower reel receiving shaft 4 and into which a hub driving shaft (not shown) is inserted inside the reel hub 3.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

Further, since the thin-walled flange portions 1a and 2a of the upper and lower flanges 1 and 2 are formed so as to be located at the centers of the thicknesses of the respective flanges, after the tape reel is injection-molded. Even if the molded product shrinks due to cooling, the flanges 1 and 2 are uniformly shrunk, so that the tape reel does not warp. Therefore, when the tape reel rotates, the flanges 1 and 2 do not run out, and therefore the tape edge does not hit the flange surface strongly, so that damage to the tape edge can be prevented. Further, by reducing the thickness of the upper and lower flanges 1 and 2, it is possible to reduce the weight of the tape reel and save the material.

[Brief description of drawings]

FIG. 1 is a front view of an upper flange of a tape reel according to the present invention.

FIG. 2 is a rear view of the upper flange of the tape reel according to the present invention.

FIG. 3 is a vertical sectional view of a tape reel according to the present invention.

FIG. 4 is a vertical sectional view showing an example of a conventional tape reel.

[Explanation of symbols]

 1 Upper Flange 1a Flange 2 Lower Flange 2a Flange 3 Reel Hub 6 Flange Outer Edge 7 Tape Position Control Rib

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[Procedure amendment]

[Submission date] April 27, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 4

[Correction method] Change

[Correction content]

[Figure 4] ─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] March 4, 1993

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 4]

Claims (1)

[Scope of utility model registration request] 1. An upper flange and a lower flange of a reel are formed into a thin-walled flange portion by uniformly stealing the front and back flange surfaces of the same amount, and the thin-walled flange portion of the upper flange and the lower flange. The tape reel is characterized in that a plurality of radial tape position regulating ribs extending from the center of the reel toward the outer peripheral side are provided on the flange surface with which the tape contacts.