JPH04313845A - Tape loader - Google Patents

Abstract

PURPOSE:To enhance the assembly working efficiency. CONSTITUTION:Tip parts of slant guides 38b and 45b on two guides assembly bodies 38 and 45 are provided with protectors 44 and 51 projecting in the outer diametrical direction, and projecting amts. of these protectors 44 and 51 are set larger than a projecting amt. of a head chip 1a of a drum 1, and are also set smaller than a size between the outer circumferential surfaces of slant guides 38b and 45b and the outer circumferential surface of the drum 1 in the tape loading completion positions of the guide assembly bodies 38 and 45. By this method, even when the slant guides 38b and 45b are slanted toward the drum side in the tape loading completion positions of the guide assembly bodies, the protectors 44 and 51 are brought into contact with the outer circumferential surface of the drum 1, so that even upon occurrence of mispositioning of the guide assembly bodies 38 and 45 can be prevented from colliding against the head chip 1a.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape loading device suitable for use in a magnetic recording/reproducing device such as a video tape recorder.

0002

[Prior Art] In recent years, video tape recorders (hereinafter referred to as "
The spread of magnetic recording and reproducing devices such as "VTR" (VTR) is remarkable, and with this, VTRs are becoming more familiar.

Conventionally, as this type of magnetic recording/reproducing apparatus, one equipped with a tape loading apparatus as shown in FIGS. 5 and 6, for example, has been employed. This tape loading device will be briefly explained based on the same figure. In the same figure, the reference numeral 1 denotes a drum having a head tip (not shown) projecting in the radial direction, and 2 is a drum provided on both sides of the drum 1. Guide grooves 2a, 2 for moving the guide assembly
Two rails 3 and 4 having a diameter b are movably provided in the guide grooves 2a and 2b of the rail 2, and the drum 1
These two guide assemblies include roller guides 3a, 4a and inclined guides 3b, 4b for winding the magnetic tape 6 in the cassette 5 around the outer peripheral surface of the cassette.

Further, numeral 7 is a capstan, 8 is a pinch roller, 9 is a full erase head, 10 is a channel erase head, 11 is a fixed head for recording and reproduction, 12 is a tape guide for a tension regulator, and 13 to 19 are supplies. Side tape guides 20 to 22 are tape guides on the winding side.

Note that among the tape guide 12 and the tape guides 13 to 19 on the winding side, the tape guide 19
functions as a movable tape guide.

[0006] Tape loading in the tape loading device constructed as described above is performed by moving the guide assemblies 3 and 4 in the guide grooves 2a and 2b. That is, the supply side guide assembly 3 and the take-up side guide assembly 4, which move in opposite directions with the drum 1 in between, pull out the magnetic tape 6 in the cassette 5 and wrap it around the outer peripheral surface of the rotating drum 1 in a spiral shape. Wrap it around. Note that the guide assemblies 3 and 4 are reliably positioned in the loading completed state.

By the way, in a normal tape loading device, a structure is adopted in which the guide assemblies 3 and 4 have backlash with respect to the rail 2 in order to ensure smooth movement of the guide assemblies 3 and 4. .

[0008]

However, in this type of tape loading device, the guide assemblies 3, 4
Since the head chip is placed very close to the drum 1 after loading, it is necessary to pay close attention to the assembly work in order to prevent damage to the head chip. In other words, assembly work that lacks the utmost care
If the guide assemblies 4 and 5 are incorrectly positioned due to runaway of the servo system or trouble during adjustment of the tape running system, the inclined guides 3b and 4b may tilt from their normal state to the drum side and cause damage to the head chip (not shown). This is because there is a high risk of collision and damage to the head chip. As a result, not only does assembly work take a lot of time, but it also becomes difficult, leading to a reduction in work efficiency.

The present invention has been made in view of the above circumstances, and provides a tape loading device that can shorten assembly work time, facilitate assembly work, and thereby improve work efficiency. This is what we provide.

0010

[Means for Solving the Problems] A tape loading device according to the present invention is provided with protectors projecting in the outer diameter direction at the tips of the inclined guides of both guide assemblies, and the amount of protrusion of these protectors is equal to the amount of protrusion of the head chip. The protrusion amount is set to be larger, and the protrusion amount is set to be smaller than the dimension between the outer peripheral surface of the inclined guide and the outer peripheral surface of the drum at the tape loading end position of both guide assemblies.

[0011]

According to the present invention, even if the inclined guide is inclined toward the drum at the tape loading end position of the guide assembly, the protector comes into contact with the outer peripheral surface of the drum.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the structure of the present invention will be explained in detail with reference to embodiments shown in the drawings.

FIG. 1 is a plan view showing the main parts of the tape loading device according to the present invention, and FIGS. 2(A) and 2(B) show the loading completed state of the supply side guide assembly in the tape loading device according to the present invention. FIGS. 3(A) and 3(B) are a sectional view and a plan view showing the inclined guide, respectively, showing a state in which loading of the guide assembly on the take-up side in the tape loading device is completed, and a plan view showing the inclined guide. In the same figure and the following figures, the same members as in FIGS. 5 and 6 are designated by the same reference numerals, and detailed explanations will be omitted. In the same figure, the reference numeral 31 indicates a rail having a main rail 32 and sub-rail blocks 33a, 33b, which is provided around the drum 1, with guide grooves 34a opening on the front and back surfaces on both sides of the rail,
34b is formed. The sub-rail blocks 33a and 33b of this rail 31 have recesses 35 that are V-shaped in plan view.
Rail plates 35 and 36 having a and 36a are fixed. Further, on the winding side of the rail 31, a concave groove 37 for guiding a pin is formed which opens upward.

Reference numeral 38 denotes a guide assembly on the supply side having a roller guide 38a and an inclined guide 38b, and a slider 39 facing the front opening edge of the guide groove 34a, and connected to this slider 39 via a first positioning pin 40. and a slider block 41 facing the rear opening edge of the guide groove 34a, and is movably provided on the rail 31. The guide assembly 38 is also provided with a leading pin 42 facing the guide groove 34a and a second positioning pin 43 that can fit into the groove 35a.

A cap-shaped protector 44 is fixed to the upper end surface of the inclined guide 38b, and is entirely made of resin such as polyacetate. The protrusion amount Y1 of the protector 44 is set to a protrusion amount of about 100 μm to 200 μm, which is larger (Y1>X) than the protrusion amount X (50 μm or less) of the head chip 1a of the rotary head 1, and At the tape loading end position, the amount of protrusion is set to be smaller than the dimension Z1 between the outer peripheral surface of the inclined guide 38b and the outer peripheral surface of the rotary drum 1 (Y1<Z1).

On the other hand, 45 is a guide assembly on the winding side having a roller guide 45a and an inclined guide 45b, and a slider 46 facing the front opening edge of the guide groove 34b.
and a slider block 48 connected to the slider 46 via a first positioning pin 47 and facing the back opening edge of the guide groove 34b, and is movably provided on the rail 31. In addition, this guide assembly 4
5 is provided with a guide pin 49 facing the guide groove 34b and a second positioning pin 50 that can fit into the recess 36a.

A cap-shaped protector 51 is fixed to the lower end surface of the inclined guide 45b, and is entirely made of resin such as polyacetate. The protrusion amount Y2 of the protector 51 is set to be the same as the protrusion amount Y1 of the protector 44. That is, the protrusion amount Y2 of the protector 51 is set to be about 100 μm to 200 μm, which is larger than the protrusion amount X (50 μm or less) of the head chip 1a of the rotary head 1 (Y2>X), and the guide assembly 45 The inclined guide 45b at the tape loading end position of
The protrusion amount is set to be smaller than the dimension Z2 between the outer circumferential surface of the rotary drum 1 and the outer circumferential surface of the rotary drum 1 (Y2<Z2).

Note that the drum 1 has two upper and lower drums a.
, b, and the head chip 1a rotates between these two drums a and b.

In the tape loading device configured as described above, even if the inclined guides 38a, 45b are inclined toward the drum at the tape loading end position of the guide assemblies 38, 45, the protectors 44, 51 can protect the outer periphery of the drum 1. It will come into contact with the surface.

Therefore, in this embodiment, even if the guide assemblies 38, 45 are mispositioned due to runaway of the servo system or trouble during adjustment of the tape running system, the protectors 44, 51 prevent the tilted guide to the head chip 1a. Since collision between 38b and 45b can be prevented, assembly work time can be shortened and assembly work can be performed easily.

Note that in this embodiment, the inclined guide 3
Although an example is shown in which the protectors 44 and 51 are fixed to the 8b and 45b, the present invention is not limited to this, and as shown in FIGS.
2, the protector 53 may be fixed in an adjustable manner. In this case, the screw engagement between the inclined guide 52 and the screw 54 is loosened, and the protector 53 is moved in the direction shown by the arrow W in the figure.
Adjust the protrusion amount Y by moving .

Furthermore, in this embodiment, the protectors 44 and 51 are made of resin such as polyacetate, but the present invention may be made of nylon or other materials, and the material may be changed as appropriate. can do.

Further, in this embodiment, an example is shown in which the head chip 1a is applied to a type of VTR having a rotating drum 1, but the present invention can also be applied to a type of VTR having a rotating middle drum. Similarly applicable.

In addition, in this embodiment, an example of application to a VTR has been shown, but the present invention is not limited to this, and it goes without saying that it can be applied to various magnetic recording/reproducing devices and information processing devices.

[0025]

As explained above, according to the present invention, protectors projecting in the outer radial direction are provided at the tips of the inclined guide of the supply side guide assembly and the inclined guide of the take-up side guide assembly, and these protectors The amount of protrusion is set to be larger than the amount of protrusion of the head chip, and the amount of protrusion is set to be smaller than the dimension between the outer peripheral surface of the inclined guide and the outer peripheral surface of the drum at the tape loading end position of both guide assemblies. Therefore, even if the inclined guide is inclined toward the drum at the tape loading end position of the guide assembly, the protector will come into contact with the outer peripheral surface of the drum.

Therefore, even if a misalignment of the guide assembly occurs due to runaway of the servo system or trouble during adjustment of the tape running system, it is possible to prevent the inclined guide from colliding with the head chip, reducing assembly work time. At the same time, assembly work can be performed easily and work efficiency can be improved.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the main parts of a tape loading device according to the present invention.

FIGS. 2A and 2B are a cross-sectional view showing a state in which loading of the guide assembly on the supply side in the tape loading device according to the present invention has been completed, and a plan view showing the inclined guide thereof.

FIGS. 3A and 3B are a cross-sectional view showing a state in which the loading of the guide assembly on the take-up side in the tape loading device is completed, and a plan view showing the inclined guide thereof.

FIGS. 4A and 4B are a sectional view and a plan view showing an example of attaching a protector to an inclined guide in another embodiment.

FIG. 5 is a plan view showing a tape running system of a conventional tape loading device.

FIG. 6 is a plan view showing a rail of a conventional tape loading device.

[Explanation of symbols]

1...Drum, 1a...Head chip, 31...Rail, 34
a, 34b...Guide groove, 38...Guide assembly, 38b...
Inclined guide, 45... Guide assembly, 45b... Inclined guide, 44, 51... Protector.

Claims (1)

[Claims] 1. A drum having a head tip protruding in the outer diameter direction, a rail provided around the drum and having two guide grooves for moving the guide assembly, and a head tip movable in both guide grooves of the rail. two guide assemblies each having an inclined guide for winding a magnetic tape around the outer peripheral surface of the drum; a protector protruding in the outer radial direction at the tip of the inclined guide of both guide assemblies; The protrusion amount of the protector is set to be larger than the protrusion amount of the head chip, and the protrusion amount is smaller than the dimension between the outer peripheral surface of the inclined guide and the outer peripheral surface of the drum at the tape loading end position of both guide assemblies. A tape loading device characterized by being set to.