JP3099767U - Reel stand braking device for magnetic tape unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the workability of a reel stand braking device of a magnetic tape device by enabling a locking hole of a brake band to be locked without being forcibly fitted to a hook. This prevents deformation of the shape of the locking hole and enhances the stability of the braking operation. Prevents the locking hole from accidentally falling out of the hook.
SOLUTION: A locking hole 25 of a brake band 2 is locked to a plate-like hook 5 on the chassis side, and the locking hole 25 is prevented from being pulled out by a projection 52 of the hook 5. An auxiliary hole 26 for widening the locking hole 25 is added, and the width B1 of the combination of the auxiliary hole 26 and the locking hole 25 is made larger than the width B of the protrusion 52. A protruding piece 27 is provided in the auxiliary hole 26, and the leading edge of the protruding piece 27 faces the hook 5.
[Selection] Fig. 2

Description

The present invention relates to a reel stand braking device for a magnetic tape device, and more particularly to a reel stand braking device in which one end of a brake band for braking a reel stand is locked to a hook provided on a chassis side.

FIG. 4 is an explanatory diagram showing a schematic configuration of a reel stand braking device employed in a magnetic tape device. Reference numeral 1 denotes a reel base, the outer peripheral surface of which is formed as a friction surface 12 on a cylinder. The reel base 1 is provided with an input gear 13, and the reel base 1 rotates in a forward direction or a reverse direction by a rotational force transmitted through the input gear 13. The brake band 2 is wound around the friction surface 12 of the reel base 1, and one end of the brake band 2 is engaged with a hook 5 cut and raised on the chassis 100. Is locked to a hook 62 of the movable body 6 which is swingably supported by a support shaft 61 provided on the chassis 100. When the movable body 6 swings about the support shaft 61 in the direction of arrow a to pull the brake band 2 along the friction surface 12 of the reel base 1 in the direction of arrow b, the pads 23 of the brake band 2 The reel base 1 is pressed against the friction surface 12 to brake the reel base 1. When the movable body 6 returns and swings to the initial position, the brake band 2 is loosened and the braking is released.

The brake band 2 is formed by attaching a pad 23 to a laterally elongated sheet made of a synthetic resin having low elongation, and at a position where one end of the brake band 2 is to be engaged with the hook 5, a horizontally elongated locking hole formed at one end. The plate-shaped hook 5 is inserted into a hook (described later). That is, as shown in the partially enlarged view of FIG. 5, one end of the brake band 2 is formed as a vertically wide portion 21 which is widened in the vertical direction. A locking hole 25 of A1 is provided. On the other hand, the hook 5 has a neck portion 51 having a lateral width A shown in FIG. 5 and a wide protruding portion 52 shown in FIG. 4, and the protruding portion 52 is wider than the locking hole 25 in the lateral direction. Is formed. In addition, the neck portion 51 of the hook 5 is locked by the locking hole 25 slightly wider than the locking portion 25 at the locking portion between the two, while the neck portion 51 is inserted into the locking hole 25 and The protruding portion 51 protruding from the hook prevents the hook 5 from being pulled out from the locking hole 25.

に お い て In the reel stand braking device described above, the operation of locking one end of the brake band 2 to the hook 5 is performed according to the following procedure. That is, the wide portion 21 in the longitudinal direction of the brake bant 2 is gripped by a jig or a finger of a hand, and the locking hole 25 is forcibly fitted to the protrusion 51 of the hook 5, thereby engaging with the neck 51 of the hook 5. The stop hole 25 is locked.

In the prior example, the locking hole of the brake band is fitted into the hook in the upright posture formed by cutting and raising the chassis, and the hook is locked. Is described (for example, see Patent Document 1). Also in this case, a wide arm (corresponding to the protruding portion 52 described with reference to FIG. 4) provided in the hook portion prevents the locking hole from being pulled out. In the operation of locking the hook, it is necessary to forcibly fit the locking hole into the arm of the hook portion.

JP-A-2002-61680

In the reel stand braking device described with reference to FIG. 4 or FIG. 5, the locking hole 25 of the brake band 2 is pushed into the protrusion 51 of the hook 5 by the work of locking one end of the brake band 2 to the hook 5. Due to the necessity of fitting, the workability at the time of forcible fitting is extremely poor, and in a severe case, the brake band 2 may be broken around the locking hole 25 to cause a work defect. The shape of the substantial locking edge 25a of the locking hole 25 is deformed at the time of forced fitting, and the locking reference position with respect to the hook 5 is changed, and the tension of the brake band 2 during the braking operation is initialized. And the braking operation becomes unstable. This problem cannot be solved at all by the techniques described in the above-mentioned patent documents.

The present invention has been made in view of the above-mentioned problems, and the work has been made by enabling one end of the brake band to be locked to the hook without forcibly fitting the locking hole of the brake band to the hook. Despite being able to improve the braking performance and improve the stability of the braking operation by preventing the shape of the locking edge of the locking hole from being deformed at the time of forced fitting, An object of the present invention is to provide a reel stand braking device for a magnetic tape device in which a stopped locking hole is not easily pulled out of a hook.

The reel stand braking device of the magnetic tape device according to the present invention has a locking hole formed at one end of a brake band made of a synthetic resin laterally long sheet that is pressed against a friction surface of the reel stand to brake the reel stand. The hook is inserted into the locking hole and protrudes from the locking hole at the locking point. The locking hole is formed wider than the stop hole in the lateral direction to prevent the locking hole from coming out of the hook.

An auxiliary hole for widening the locking hole in the lateral direction toward the center in the longitudinal direction of the brake band is added to one end of the brake band. The width of the hook combined with the hole is larger than the width of the projection, and the hook is inserted into the locking hole in the auxiliary hole integrally with the brake band. An elastically deformable protruding piece is provided for restricting the hook from being displaced toward the auxiliary hole in opposition to the above.

With this configuration, the width of the combined auxiliary hole and the locking hole is larger than the width of the protrusion of the hook, so that the protrusion provided in the auxiliary hole is elastically deformed while engaging. The locking hole can be fitted to the hook by using the stop hole and the auxiliary hole, and after the hook is fitted to the locking hole, the protruding piece faces the hook and the hook engages with the hook. Regulate the mutual position with the locking hole. Therefore, it is not necessary to forcibly fit the locking hole to the hook, so that the workability when locking one end of the brake band to the hook is improved, and the shape of the locking edge of the locking hole is also difficult. Deformation at the time of fitting does not occur, and the stability of the braking operation is improved. Nevertheless, the locking hole portion locked to the hook does not easily come out of the hook. In the present invention, the lateral width of the protruding portion means that when the locking hole is fitted into the protruding portion using the auxiliary hole, the locking hole and the auxiliary hole do not forcibly fit. And the width of a portion wider than the lateral width of the locking hole.

In the present invention, it is possible to adopt a configuration in which the protruding piece protrudes from the lateral edge of the auxiliary hole toward the locking hole, and the tip edge faces the hook. is there. According to this, when the engaging hole is fitted into the hook, the protruding piece is easily deformed in the entire protruding direction, so that the workability is further improved.

で は In the present invention, it is preferable that voids are formed on both sides of the projecting piece in the longitudinal width direction of the auxiliary hole. According to this, in a brake band made of a synthetic resin narrow sheet in which it is difficult to make a cut using a so-called Thomson machine using a Thomson blade, a stamping mark is formed by pressing when forming a projection. Since it is possible to form the hook by forming a void in the brake band, it is possible to form a brake band consisting of a synthetic resin narrow sheet that is difficult to use with a Thomson processing machine. There is an advantage that the locking hole, the auxiliary hole, and the projection can be easily formed at one time.

In the present invention, it is preferable that the vertical width of the auxiliary hole is larger than the vertical width of the locking hole. With this configuration, when the vertical width of the locking hole is appropriately determined in relation to the thickness of the plate-shaped hook, the auxiliary width is not affected by the vertical width of the locking hole. Since the vertical width of the hole can be determined, the vertical width of the protruding piece can also be freely determined. Therefore, the strength of the waist during elastic deformation of the protruding piece formed integrally with the brake band made of a synthetic resin narrow sheet can be adjusted by increasing or decreasing its vertical width. This is useful for improving workability when fitting the locking hole into the hook and enhancing the function of preventing the locking hole from being pulled out of the hook.

In the braking device for a magnetic tape device according to the present invention, a locking hole formed at one end of a synthetic resin lateral band sheet that is pressed against a friction surface of a reel base and brakes the reel base includes a chassis. The hook is inserted into the locking hole and protrudes from the locking hole at the locking point. In a reel base braking device for a magnetic tape device, which is formed to be wider in the lateral direction than the portion and prevents the locking hole from coming out of the hook, one end of the brake band is widened in the vertical direction. The auxiliary hole portion is formed as a portion, and an auxiliary hole portion for widening the locking hole portion in the lateral direction toward the longitudinal center portion of the brake band is added to the wide portion in the vertical direction. With the locking hole The combined lateral width is larger than the lateral width of the protruding portion, and the vertical width of the auxiliary hole is larger than that of the locking hole. An elastically deformable protruding piece that protrudes from the direction edge toward the locking hole side, and restricts that the distal end edge faces the hook and displaces the hook toward the auxiliary hole side is provided, It is possible to adopt a configuration in which voids are formed on both sides of the protruding piece in the longitudinal width direction of the auxiliary hole. The operation achieved by the present invention will be described in detail with reference to an embodiment described later.

As described above, according to the reel stand braking device of the magnetic tape device according to the present invention, it is possible to lock one end of the brake band to the hook without forcibly fitting the locking hole of the brake band to the hook. And the workability is improved. At the same time, there is no need to forcibly fit the locking hole into the hook, so there is no room for the shape of the locking hole to be deformed when forcibly fitted, and the shape and position of the locking edge of the locking hole are eliminated. Cannot be changed, and as a result, the stability of the braking operation is improved, and the mode switching performance of the magnetic tape device is improved. In addition, since the locking hole locked to the hook is not easily pulled out of the hook, the locking hole does not accidentally slip out of the hook and the braking operation becomes unstable. .

FIG. 1 is a plan view showing a main part of a reel stand braking device of a magnetic tape device according to an embodiment of the present invention, partially cut away, FIG. 2 is a longitudinal sectional view showing an enlarged main part of FIG. 1, and FIG. FIG. 9 is an explanatory diagram showing a working state when the locking hole 25 is locked to the hook 5.

The brake band 2 shown in FIG. 1 or FIG. 2 is made of a horizontally long sheet made of a synthetic resin having low elongation such as polyethylene terephthalate resin, and one end thereof is formed as a vertically wide portion 21 which is widened in the vertical direction. I have. A horizontally long rectangular locking hole 25 having a width A1 is formed in the vertical wide portion 21, and the locking hole 25 is directed toward the center of the brake band 2 in the longitudinal direction. The width B1 of the combination of the auxiliary hole 26 and the locking hole 25 is larger than the width B of the protrusion 52 of the hook 5. I have. In this embodiment, the width A1 of the locking hole 25 is slightly shorter than the width A of the neck 51 of the hook 5, but the width of the locking hole 25 is increased by the auxiliary hole 26. A part of the auxiliary hole 26 is substantially used as the locking hole 25. The hook 5 is formed by cutting and raising the chassis.

In this embodiment, as can be seen in FIG. 1, a portion longer than the neck 51 of the hook 5, specifically, one end of the neck 51 and the length from one end thereof to the opposing side 52 a of the protrusion 52 are defined as the length of the hook 5. Although the width B of the protrusion 52 is specified, the width of the protrusion 52 is determined by using the auxiliary hole 26 to fit the lock hole 25 into the protrusion 52. And the auxiliary hole 26 pass through without causing a forced fitting state, and mean the width of a portion wider than the lateral width A1 of the locking hole 25. Therefore, as shown in FIG. 3, when an assembling procedure in which the longitudinal wide portion 21 of the brake band 2 is inclined and fitted to the protruding portion 52 of the hook 5 is specified as shown in FIG. 3, the neck 51 of FIG. One end 51a and the length from the one end 51a to the opposing side 52a of the protruding portion 52 are defined as the width B of the protruding portion 52, and the width of the auxiliary hole 26 and the locking hole 25 is larger than the width B. Although it is necessary to make B1 large, it is not always necessary to make the width B1 of the combination of the auxiliary hole 26 and the locking hole 25 larger than the maximum width C of the protrusion 52.

The auxiliary hole 26 is provided with a protruding piece 27 protruding from the lateral edge 26a of the auxiliary hole 26 toward the locking hole 25, and the leading edge of the protruding piece 27 is engaged. The hook 5 inserted into the stop hole 25, more specifically, the neck 51, is restricted from displacing the hook 5 toward the auxiliary hole 26. Further, voids S are formed on both sides of the projecting piece 27 in the longitudinal width direction of the auxiliary hole 26. These cavities S are formed by pressing the auxiliary holes 26 and the locking holes 25 when forming the auxiliary holes 26, the locking holes 25, and the projecting pieces 27 in the longitudinally wide portion 21. It corresponds to the stamped mark when punching.

In addition, the vertical width E of the auxiliary hole 26 is made larger than the vertical width D1 of the locking hole 25, so that the vertical width of the protruding piece 27 having the void S on both sides in the vertical direction. The size is increased, whereby the stiffness of the protruding piece 27 during elastic deformation is adjusted to a required size.

構成 The configuration of the reel stand braking device other than that described here is the same as that already described with reference to FIG. 4, so that detailed description thereof will be omitted to avoid redundant description.

According to this embodiment, when the one end of the brake band 2 is to be locked to the hook 5, the longitudinal wide portion 21 of the brake band 2 is inclined with respect to the protrusion 52 of the hook 5 as shown in FIG. Then, both the locking hole 25 and the auxiliary hole 26 are fitted into the protrusion 52 of the hook 5. With this configuration, when the locking hole 25 passes through a portion of the hook 5 that is wider than the width A1 of the locking hole 25 (see FIG. 2), the protruding piece 27 moves toward the protrusion 52 of the hook 5. Since the elastic member is elastically deformed into a warped shape when hitting the edge, the fitting operation can be performed without difficulty, and the fitting edge does not deform the locking edge 25a of the locking hole 25. Therefore, the situation where the tension of the brake band 2 at the time of the braking operation becomes smaller than the initially set tension due to the deformation of the locking edge 25a and the braking operation becomes unstable does not occur. Also, when the hook hole 25 is fitted into the neck 51 of the hook 5 and the hook 5 locks the hook hole 25 as shown in FIG. 1 or 2, the projection 52 overlaps the protruding piece 27. Therefore, a situation in which the locking hole 25 comes out of the hook 5 does not occur.

In the embodiment described above, the projecting piece 27 projects from the lateral edge 26a of the auxiliary hole 26 toward the locking hole, but the projecting direction of the projecting piece 27 is not limited to this. For example, by projecting the protruding piece 27 from the edge on one side in the vertical direction of the auxiliary hole portion 26 toward the other side edge, the side edge of the protruding piece 27 is opposed to the neck 51 of the hook 5. It is also possible.

FIG. 2 is a plan view of the main part of the reel stand braking device of the magnetic tape device according to the embodiment of the present invention, partially cut away. FIG. 2 is an enlarged longitudinal sectional view of a main part of FIG. 1. It is explanatory drawing which showed the working state at the time of locking a locking hole to a hook. FIG. 3 is an explanatory diagram showing a schematic configuration of a reel stand braking device employed in the magnetic tape device. It is the elements on larger scale which showed the locking structure of the brake band and the hook in the conventional reel stand braking device.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Reel stand 2 Brake band 5 Hook 12 Friction surface 21 Long width part in a vertical direction 25 Locking hole part 26 Auxiliary hole part 26a Lateral edge of auxiliary hole part 27 Protrusion piece 52 Hook protrusion part B Width width of protrusion part B1 auxiliary Horizontal width dimension of the hole and the locking hole E Vertical length of the auxiliary hole D1 Locking hole S Empty space

Claims (5)

A locking hole formed at one end of a brake band made of a synthetic resin laterally long sheet that is pressed against the friction surface of the reel base to brake the reel base is engaged with a plate-shaped hook provided on the chassis side. The hook is inserted into the locking hole and protrudes from the locking hole at the locking point, and the protrusion of the hook is formed to be wider in the lateral direction than the locking hole, and In a reel stand braking device of a magnetic tape device that prevents a stop hole from coming off a hook,
One end of the brake band is formed as a vertical wide portion that is widened in the vertical direction, and the locking hole portion is formed in the vertical wide portion in the horizontal direction toward the center in the longitudinal direction of the brake band. By adding an auxiliary hole to widen the auxiliary hole and the locking hole, the width of the combined hole is made larger than the width of the protrusion, and the vertical width of the auxiliary hole is set to It is larger than the locking hole,
The auxiliary hole protrudes from the lateral edge of the auxiliary hole toward the locking hole, and the leading edge faces the hook and the hook is displaced toward the auxiliary hole. An elastically deformable projecting piece for regulating is provided, and a space is formed on both sides of the projecting piece in the longitudinal width direction of the auxiliary hole portion. A locking hole formed at one end of a brake band made of a synthetic resin laterally long sheet that is pressed against the friction surface of the reel base to brake the reel base is engaged with a plate-shaped hook provided on the chassis side. The hook is inserted into the locking hole and protrudes from the locking hole at the locking point, and the protrusion of the hook is formed to be wider in the lateral direction than the locking hole, and In a reel stand braking device of a magnetic tape device that prevents a stop hole from coming off a hook,
At one end of the brake band, an auxiliary hole for widening the locking hole in the lateral direction toward the center in the longitudinal direction of the brake band is added, so that the auxiliary hole and the locking hole are added. And the width of the protrusion is larger than the width of the protrusion, and the auxiliary hole is integrally connected to the brake band, and faces the hook inserted through the locking hole. An elastically deformable protruding piece for restricting the hook from being displaced toward the auxiliary hole is provided on the reel stand braking device of the magnetic tape device. 4. The reel stand braking device for a magnetic tape device according to claim 3, wherein the protruding piece protrudes from a lateral edge of the auxiliary hole toward the locking hole, and a leading edge faces the hook. . 4. The reel stand braking device for a magnetic tape device according to claim 3, wherein voids are formed on both sides of the projecting piece in the longitudinal width direction of the auxiliary hole. 5. The reel stand braking device for a magnetic tape device according to claim 4, wherein a vertical width of the auxiliary hole is larger than a vertical width of the locking hole.

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