JPH09245459A - Guide for belt-shaped member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need for positioning guides by fitting a tape guide securely into a support body of a housing container while blocking the turning thereof to reduce the number of parts with a simplification of assembling. SOLUTION: Four protruded parts 40 of an inner circumferential part 38 of a guide shaft part 30 at a tape guide 1 are dogged into a support body 34 and the guide shaft part 30 is locked securely in the axial direction of the support body 34. The guide shaft part 30 is also blocked from turning along the circumferential direction thereof. A tape guide 1 made up of a flange part 31 and a guide shaft part 30 is fixed accurately between an upper shell 12 and a lower shell 13. At this point, the upper shell 12 is mounted to cover the lower shell 13 so that the tape guide 1 can be automatically fixed between the upper and lower shells 12 and 13. Thus, the guide shaft part 30 is held so as not to be slipped off the support body 34 axially as well as turned in the direction of rotation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is arranged in an accommodating container for accommodating a band-shaped member for storing information, such as a video cassette, for guiding the band-shaped member along a traveling route. It is about.

[0002]

2. Description of the Related Art As a belt-shaped member for storing information, a magnetic tape accommodated in a video cassette, for example, travels from one reel to another reel through a predetermined traveling path by a tape guide in the video cassette. It has become. As shown in FIG. 9, this type of tape guide G is fixed between the shells SH1 and SH2 of the video cassette CA. In such a tape guide fixing structure, the two screws N, N fix the metal tape guide G from both sides of the shells SH1, SH2. The tape guide G has a tubular shape, and the screws N, N are screwed into the shells SH1, S from both ends thereof using a tool.
H2 and the tape guide G are integrally fixed. The magnetic tape T can be guided along the tape guide G along a predetermined traveling path in the video cassette CA.

[0003]

However, in the structure for fixing the guide G using the two screws N, N shown in FIG. 9, there is a problem that the number of parts is large and the number of assembling steps is large, so that the cost cannot be reduced. . In addition, it is necessary to process in advance an internal thread for engaging the screws N with the inner circumference GN of the tape guide G. Another conventional fixing method for the tape guide is shown in FIGS. 10 and 11. The conventional metal tape guide G1 of the video cassette CA shown in FIG. 10 includes a tubular guide portion GB, a brim portion F,
F is a separate member, and the guide portion GB and the brim portions F, F
Is the shell SH1, S by the two screws N, N
It is fixed at H2. Such a guide G1 of FIG.
Even if the fixing method is used, there is still a problem that the number of parts is large and the number of man-hours is large so that the cost cannot be reduced. FIG.
Even with the conventional fixing method of 0, it is necessary to tap the female screw on the inner peripheral portion of the metal guide G1 in advance, which is very troublesome.

The conventional method of fixing the tape guide G2 shown in FIG. 11 has a guide portion GC and two brim portions F and F, and a resin portion J is formed on the inner surface of the guide portion GC. Then, by screwing the screws N, N into the resin portion J, so-called self-tapping is performed to form a female screw, and the guide G2 is fixed to the shells SH1, SH2 by the screws N, N. Even in the method of fixing the guide G2 in FIG. 11, the number of partial points is large and the number of assembling steps is large, so that the cost cannot be reduced. Therefore, the present invention has been made to solve the above problem, and provides a guide for a belt-shaped member that can be easily attached with a reduced number of parts in order to guide a belt-shaped member such as a video tape. Has an aim.

[0005]

According to the present invention, the above object is arranged in a container for accommodating a band member for recording information which is run between reels, and the band member is used as a running path. In the guide of the belt-shaped member for guiding along the axial direction, there is a hollow portion, and the rotation preventing portion is formed on the inner peripheral portion forming the hollow portion, and the rotation blocking portion projects into the container. By inserting the support body provided in this hollow portion, by the guide of the belt-shaped member fixed to the support body in a state in which the rotation blocking portion is rotation-blocked with respect to the support body,
Achieved. In the present invention, the guide of the belt-shaped member has a hollow portion along the axial direction thereof, and the rotation preventing portion is formed in the inner peripheral portion forming the hollow portion. Therefore, the rotation preventing portion of the guide can prevent the rotation of the guide with respect to the support body and fix the support body with respect to the support body when the support body provided so as to project from the container is inserted into the hollow portion. it can. That is, the guide can be fixed to the storage container in a state in which the rotation is blocked only by fitting the guide into the support of the storage container, so that the assembly is simple and the number of parts can be reduced. Moreover, the guide need not be aligned with respect to the rotation direction.

[0006]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Note that the embodiments described below are preferred specific examples of the present invention,
Although various technically preferable limitations are given, the scope of the present invention is not limited to these modes unless otherwise specified to limit the present invention. FIG. 1 shows a preferred embodiment of a video cassette provided with a guide for a traveling member of the present invention. In FIG. 1, this video cassette is a so-called U-Format.
A video cassette for (for example, a video cassette having a magnetic tape of 3/4 inch width for a broadcasting station), in which an upper shell 12 of the cassette and a lower shell 13 of the cassette constitute a container and are fixed with screws 21. it can. A cassette lid 10 is provided over the upper shell 12 and the lower shell 13 of the cassette. The cassette lid 10 is opened when the container is inserted into a video tape recorder to reproduce a signal recorded on the magnetic tape 22 or record a signal on the magnetic tape 22. 22 can be exposed to the outside of the container.

The upper shell 12 of the cassette is provided with a window 14. Two reels 19a and 19b are housed between the upper shell 12 and the lower shell 13 of the cassette. A reel upper member 18a and a reel upper member 18b are arranged on the reel 19a. The magnetic tape 22 has a leader tape 23, a trailer tape 24, and the like. The magnetic tape 22 is, for example, a tape having a width of 3/4 inch. The magnetic tape 22 is the lower shell 1
The reels 19a and 19b travel in a forward direction or a reverse direction via a predetermined route 3. The magnetic tape 22 moves from the reel 19b to the traveling route portions R1 and R.
2, the tape guide 1, the tape retainer 20, and the two tape guides 1, 1 to reach the other reel 19a. The above-mentioned three tape guides 1, 1, 1 are fixed between the lower shell 13 of the cassette and the upper shell 12 of the cassette by the same fixing method.

Next, the above-mentioned tape guide 1 of FIG.
The fixing structure of 1, 1 will be described in detail with reference to FIGS. 2 to 4, the tape guide 1 is
2 is a guide of the strip-shaped member of the present invention, FIG. 2 is an axial cross-sectional view showing the vicinity of the fixing structure of the tape guide 1, and FIG.
FIG. 4 is an exploded view showing the tape guide 1 of FIG. 2 and its peripheral portion, and FIG. 4 is a perspective view thereof. 2 to 4, the tape guide 1 is firmly fixed between the upper shell 12 and the lower shell 13 of the cassette of the container without using screws. The tape guide 1 has a guide shaft portion 30 and two brim portions 31 and 31, and is fixed to a support 34 of the lower shell 13 of the cassette. As shown in FIGS. 2 to 4, the guide shaft portion 3
Reference numeral 0 denotes a cylindrical member having a hollow portion 35 as shown in FIG. Therefore, the guide shaft portion 30 has an opening 3 at one end.
6 and an opening 37 at the other end, and this hollow portion 35 is formed in the axial direction. The openings 36 and 17 are formed so as to taper inward at a predetermined angle θ as necessary. This angle θ is, for example, about 10 to 30 degrees. By forming the openings 36 and 37 in the tapered shape in this manner, when the guide shaft portion 30 is inserted into the support body 34, the upper end portion 34a of the support body 34 is not damaged, and the guide shaft portion 30 is not damaged.
The concentricity of the support 34 can be ensured.

Between the opening 36 and the opening 37, the inner peripheral portion 38 forming the hollow portion 35 is provided with the protruding portions 40 at every 90 degrees along the circumferential direction as shown in FIG. Four are formed. The protrusion 40 is also referred to as a bead portion, and the distance DT between the opposing protrusions 40, 40 in FIG.
Is set to be smaller than the diameter DL of the support 34. Moreover, the diameter FD of the inner peripheral portion 38 is set to be substantially the same as the diameter DL of the support body 34. Guide shaft portion 30,
The brim portions 31 and 31 are, for example, SUS-303 and SUS.
-316, SUS-305, SUS-304, etc., non-magnetic stainless steel, Al, brass plated, and the like. -Made of styrene copolymer (ABS).

As shown in FIG. 2, the brim portions 31 and 31 are members which are attached in close contact with the inside 12a of the upper shell 12 of the cassette and the inside 13a of the lower shell 13 of the cassette. These brim portions 31 and 31 are the magnetic tape 22.
However, when guided along the outer peripheral surface 30a of the guide shaft portion 30, the axial position of the guide shaft portion 30 is restricted. Each of the brim portions 31 and 31 has a hole 31 a through which the support 34 is passed. Upper shell 12
A fitting hole 12b for fitting the upper end portion 34a of the support body 34 is formed in the inner side 12a of the. The tape guide 1 shown in FIGS. 2 to 4 is the three tape guides 1, 1, 1 of FIG. The support 34 is provided so as to vertically stand up and project from the inner side 13 a of the lower shell 13. The support 34 is a solid columnar member.

Next, a method of assembling the tape guide 1 will be described. By passing one brim portion 31 through the support 34, the brim portion 31 is placed inside 13 a of the lower shell 13. Then, the guide shaft portion 30 is fixed by being fitted into the support body 34. That is, the inner peripheral portion 3 of the guide shaft portion 30
By engaging the four protruding portions 40 of No. 8 with the support body 34, the guide shaft portion 30 can be fixed so as not to come off in the axial direction of the support body 34, and the guide shaft portion 30
Can prevent rotation such that it does not rotate even along its circumferential direction. That is, the projecting portion 40 serves as a rotation blocking portion of the guide shaft portion 30.

Next, the other brim portion 31 is attached to the support 3
4, and the upper end 34a of the support 34 is fitted into the fitting hole 12b of the upper shell 12. By doing this, the two brim portions 31, 3
1 and a tape guide 1 composed of a guide shaft 30
Are securely fixed between the upper shell 12 and the lower shell 13. Note that the upper shell 12 is fixed to the mounting portion 13c of the lower shell 13 by using the screw 45 shown in FIG. 2, so that the support body 34 does not come out from the fitting hole 12b of the upper shell 12. As described above, by mounting the upper shell 12 so as to cover the lower shell 13 side, the tape guide 1 can be automatically fixed between the upper shell 12 and the lower shell 13, and the guide shaft portion 30 is It is held in a state in which it does not slip out in the axial direction with respect to the support body 34 and does not rotate in the rotation direction.

Next, a method of manufacturing the guide shaft portion 30 of the tape guide 1 of the present invention will be described with reference to FIG. FIG. 5D shows an example of the manufactured guide shaft portion 30. The guide shaft portion 30 can be manufactured through the steps of (A) to (D) of FIG. The plate shown in FIG. 5 (A) is
It is a plate P having a rectangular predetermined thickness. As shown in FIG. 5B, four protrusions 40 are formed in parallel with the plate P by using a manufacturing method such as rolling. And FIG.
As shown in (C), inclined surfaces 36a and 37a are formed in the portions corresponding to the openings 36 and 37, respectively. FIG.
As shown in FIG. 5D, the plate P shown in FIG. 5C is rolled into a cylindrical shape and is welded to the joint portion 30e by, for example, laser welding. The guide shaft portion 30 of the tape guide 1 of the present invention is not limited to the manufacturing method shown in FIG. 5, but the guide shaft portion 3 as shown in FIG.
It is also possible to form 0. Guide openings 36 and 37 are formed at one end and the other end of the guide shaft portion 30 made by the pipe drawing operation, if necessary.

6 and 7 show a manufacturing example of another embodiment of the guide shaft portion. The plate P of FIG. 6 (A) is
It is a rectangular plate and has a predetermined thickness. FIG.
The plate P of (A) is wound as shown in FIG. 6 (B) to form the guide shaft portion 130. The seam 130e of the guide shaft portion 130 is laser-welded using, for example, a seam welding method or the like, and a build-up protrusion 140 is formed inside the joint 130e due to the welding. The protruding portion 140 has a size of 1 relative to the inner peripheral surface 138 of the guide shaft portion 130.
Although only the main projection is formed, only one protrusion 140 can serve as a rotation blocking unit for the support body 34 of the guide shaft 130. FIG. 7 shows the end face side of the produced guide shaft portion 130.
40 are formed.

Next, referring to FIG. FIG. 8 shows an example of a video cassette having a shape different from that of FIG. This video cassette is a cassette for U-Format, including an upper shell 101 of the cassette and a lower shell 1 of the cassette.
02, upper shell 101, lower shell 10 of cassette
The reels 103 and 105 are arranged between the two.
The upper shell 101 has a window 130, and a cassette lid 112 is provided between the upper shell 101 and the lower shell 102. The cassette lid 112 is opened as needed when the video cassette is inserted into the video tape recorder to expose the magnetic tape 127.

A magnetic tape 127 can run between the reels 103 and 105. The traveling path of the magnetic tape 127 is guided to the reel 105 via the traveling path portions R4 and R5 and the tape guides 1 and 1.
The reel upper member 104,
106 are provided respectively. Further lower shell 10
A seat lower member 121, a seat upper member 122, a seat upper member 123, and the like are also disposed between the upper shell 101 and the upper shell 101. Other tape pad 117, locking 120,
A cassette spring 116, a lid lock slider 113, etc. are arranged. The upper shell 101 and the lower shell 102 are fixed by a plurality of screws 126. The magnetic tape 127 of FIG. 8 is also a 3/4 inch wide magnetic tape. The magnetic tape 127 has a leader tape 128 and a trailer tape 129. As the tape guides 1, 1, 1 shown in FIG. 8, the tape guides shown in FIGS. 2 to 4 can be used.

In the embodiment of the present invention, the guide shaft portion 30 has the projecting portion 40 (rotation preventing portion) with respect to the support body 34.
Since the guide shaft portion 30 does not rotate due to the rotation of the guide shaft portion 30, the guide shaft portion 30 does not rotate even when the tape slides, and therefore the magnetic powder is not scraped off from the guide shaft portion 30. It is possible to prevent the powder from falling. By adopting the structure of the guide of the belt-shaped member of the present invention, for example, the price of one piece is about half that of the conventional one, so that the cost can be greatly reduced and the guide shaft portion 3
Since 0 only needs to be fitted into the support 34, the assembly is easy and the number of parts can be reduced. In addition, as shown in FIG. 3, the openings 36 and 37 are tapered inward, so that the guide shaft portion 3 extends from one opening 36 (or 37).
When 0 is fitted into the support 34, the upper end 34a of the support 34 is not scraped by the opening 36 or 37, so that the shape of the support 34 does not change, and the support 34 and the guide shaft portion 30 do not change. The concentricity of can be secured.

The present invention is not limited to the above embodiment. In the embodiment described above, the so-called U-
Although the video cassette for Format is described as an example, the guide of the strip-shaped member of the present invention can be applied to other types of video cassettes such as VHS video cassette and 8 mm video cassette.
Further, the guide of the strip-shaped member of the present invention is not limited to a video tape for recording / reproducing audio and images, but is also applied to a magnetic tape cassette for recording / reproducing only audio, for example, a magnetic tape of DAT (digital audio tape recorder). can do. The 3/4 inch video tape according to the above-described embodiment is used, for example, for a broadcasting station, but the guide of the belt-shaped member of the present invention can be applied to a normal beta video cassette and a VHS video cassette. Can be applied.

[0019]

As described above, according to the present invention,
Since a strip-shaped member such as a video tape is guided, the number of parts can be reduced and the mounting can be easily performed.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an example of a video cassette having a guide for a belt-shaped member of the present invention.

2 is a cross-sectional view showing a peripheral portion of a tape guide of the video cassette shown in FIG.

FIG. 3 is an exploded perspective view showing the vicinity of a tape guide.

FIG. 4 is an exploded perspective view showing the vicinity of a tape guide.

FIG. 5 is a view showing an example of manufacturing the guide shaft portion of the tape guide.

FIG. 6 is a view showing another example of manufacturing the guide shaft portion.

7 is a top view of a guide shaft portion obtained in the manufacturing example of FIG.

FIG. 8 is an exploded perspective view showing another type of video cassette having a strip-shaped member guide of the present invention.

FIG. 9 is a cross-sectional view showing a conventional method for fixing a guide of a belt-shaped member.

FIG. 10 is a cross-sectional view showing another conventional fixing method for the guide of the belt-shaped member.

FIG. 11 is a cross-sectional view showing still another conventional fixing method for the guide of the belt-shaped member.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Tape guide, 12 ... Upper shell (accommodation container) of cassette, 13,130 ... Lower shell (accommodation container) of cassette, 19a, 19b ... Reel, 22 ...
・ Magnetic tape (strip-shaped member), 30 ... Guide shaft, 3
DESCRIPTION OF SYMBOLS 1 ... Collar part, 34 ... Support body, 35 ... Hollow part, 36, 37 ... Opening, 38 ... Inner peripheral part, 40 ...
..Protruding parts (rotation blocking parts)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideo Ohata Inventor Hideo Ohata 1-5-22, Kichiori-cho, Asaka-shi, Saitama Daishu Seiki Co., Ltd.

Claims (4)

[Claims] 1. A strip-shaped member guide for guiding the strip-shaped member along a traveling path, which is arranged in an accommodating container for accommodating the strip-shaped member for recording information traveling between reels, in an axial direction. Therefore, having a hollow portion, the rotation preventing portion is formed in the inner peripheral portion forming the hollow portion, by inserting the support provided to project in the container to the hollow portion, A guide for a belt-shaped member, wherein the guide is fixed to a support in a state where the rotation is blocked from rotation by the rotation blocking part. 2. The guide for a belt-shaped member according to claim 1, wherein the rotation blocking portion is formed in the inner peripheral portion of the guide in the axial direction. 3. The guide for a belt-shaped member according to claim 1, wherein the plurality of rotation blocking portions are formed in an inner peripheral portion of the guide in an axial direction. 4. The guide for a strip-shaped member according to claim 1, wherein the opening at one end and the opening at the other end connected to the hollow portion are tapered inward.