JPH05334772A - Guiding roller device - Google Patents

Abstract

PURPOSE:To secure the range of adjusting height position and to enable supressing the height of a supporting body by pressing a guiding roller with a pressing means in the direction of adjusting the height position, and simultaneously, adjusting pressing force with an adjusting means. CONSTITUTION:When an abutting part 32d at the top end of a leaf spring 32 whose fixed part 32a is fixed to an arm 29 is inserted in the space between a lower flange 24 fixed to a shaft and a collar 25, the shaft 21 to which the guiding roller 22 is fitted is put in the insertion port 27 of a boss 28, and simultaneously, an adjusting screw 33 is engaged with the engaging hole 34 of the arm 29 through the through-hole 32b of the spring 32. Also, when the screw 32 is rotated in the direction of loosing, the abutting part 32d is abutted on the back surface of the flange 24 by the pressing force of the spring 32 and the flange 24 is pushed up in the range that the spring 32 is abutted on the top part 33a of the screw 33 and the pressing force of the spring 32 is regulated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide roller device having a guide roller for guiding a magnetic tape such as a magnetic recording / reproducing device.

[0002]

2. Description of the Related Art A conventional guide roller device of this type, as shown in FIGS. 10 and 11, has upper flanges 3 on both upper and lower sides of a guide roller 2 for guiding the running of a magnetic tape (not shown) on a shaft 1. By fixing the lower flange 4 and the lower flange 4 respectively, the guide roller 2 is rotatably attached to the shaft 1 and integrally formed on the lower surface of the lower flange 4 (the surface opposite to the guide roller 2). Height adjusting screw 5 for adjusting the height position of the guide roller 2 thus formed
A boss portion 8 having a screwing hole 6 for screwing and a through hole 7 for inserting the shaft 1 is mounted on an arm 9 for supporting and fixing the guide roller device.

In the above structure, the boss portion 8 presses the side portion of the shaft 1 inserted into the insertion hole 7 and presses and holds the shaft 1 with the inner peripheral portion of the insertion hole 7 to hold the shaft 1. Screw hole 1 into which a fixing screw 10 for fixing to the portion 8 is screwed
1 is provided.

In the guide roller device constructed as described above, one end of the shaft 1 to which the guide roller 2 is attached is inserted into the insertion hole 7 of the boss portion 8 and the lower surface of the lower flange 4 fixed to the shaft 1 is fixed. The height adjusting screw 5 is screwed into the screw hole 6 of the boss portion 8, and the upper flange 3 fixed to the shaft 1 is rotated in the clockwise / counterclockwise direction (indicated by the arrow A) so that The adjusting screw 5 is rotated with respect to the screwing hole 6 to adjust the height position (position in the direction of arrow B) of the guide roller 2 with respect to the arm 9, and then the screwing hole 11 of the boss portion 8 is adjusted. The side of the shaft 1 is pressed against the tip of the fixed screw 10 by tightening the fixed screw 10 that is screwed into the shaft 1, and the shaft 1 is pressed and held by the inner peripheral portion of the insertion hole 7 to hold the shaft 1. Fixed to 8,
The guide roller 2 is supported at a desired height position.

[0005]

However, in the case of the conventional guide roller device, the height adjusting screw 5 is attached to the boss portion 8.
Since it is provided with the screw hole 6 for screwing, the height dimension of the boss portion 8 must be sufficiently secured, and the height position of the guide roller 2 with respect to the arm 9 must be set high.
Therefore, there is a problem that it is difficult to reduce the thickness of the magnetic recording / reproducing apparatus, and in the case where it is necessary to reduce the distance between the arm 9 and the lower flange 4 as the magnetic recording / reproducing apparatus is reduced in thickness, the boss portion is required. 8 through holes 7 and screw holes 6
Cannot sufficiently secure the length dimension of the guide roller 2 and the height adjustable range of the guide roller 2 is reduced, and the withstand load of the guide roller 2 in the horizontal direction (vertical direction to the arrow B direction) is also increased. There is a problem of decrease.

[0006]

A first aspect of a guide roller device according to the present invention is a biasing means for biasing a guide roller in an adjusting direction of a height position, and a biasing force of the biasing means. By doing so, an adjusting means for adjusting the height position of the guide roller is provided.

A second aspect of the present invention is a screwing portion on an inner peripheral surface of a height adjusting portion provided on a shaft for attaching a guide roller,
The height adjusting mechanism includes a screwing portion that is screwed into the screwing portion provided on the outer peripheral surface of the support body that supports the shaft.

[0008]

In the first aspect of the guide roller device according to the present invention, the biasing means biases the guide roller in the height position adjusting direction, and the adjusting means applies the biasing force of the biasing means. By adjusting, the height position of the guide roller is adjusted.

Further, in the second aspect of the invention, the screwing portion of the inner peripheral surface of the height adjusting portion provided on the shaft is screwed into the screw portion provided on the outer peripheral surface of the support to rotate the shaft. Thus, the height position of the guide roller attached to the shaft is adjusted.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the guide roller device of the present invention will be described below with reference to FIGS.

The guide roller device of the present invention comprises a shaft 2
The upper flange 23 and the lower flange 2 are provided on both upper and lower sides of the guide roller 22 for guiding the running of the magnetic tape (not shown) of FIG.
By fixing 4 respectively, the guide roller 22 is attached to the shaft 21 in a rotatable state, and the lower surface of the lower flange 24 of the shaft 21 (the surface opposite to the guide roller 22). The collar 2 is placed at a position with a slight interval (an interval that allows the tip end of the leaf spring 32, which will be described later, to be inserted and allows smooth movement).
5, a boss 28 which is a support having an insertion hole 27 through which the shaft 21 is inserted is attached to an arm 29 which supports and fixes the guide roller device, and a leaf spring 32 which is an urging means is fixed. A portion 32a is fixed to the arm 29, and a through hole 32 is formed in the arm 29 at the center of the leaf spring 32.
It is provided with a screw hole 34 into which an adjusting screw 33 having a head portion 32a as an adjusting means is screwed via b.

In the above structure, the boss portion 28 presses the side portion of the shaft 21 inserted through the insertion hole 27 into pressure contact with the inner peripheral portion of the insertion hole 27 to press and hold the shaft 1 and the boss portion. It is provided with a screwing hole 31 into which a fixing screw 30 that is fixed to the portion 28 is screwed.

The tip of the leaf spring 32 has the shaft 1
A notch 32c for avoiding contact with the lower flange 24 fixed to the shaft 1 and a collar 25 inserted into a gap between the lower flange 24 and the collar 25 to contact the lower flange 24 or the collar 25. It will be.

In the guide roller device constructed as described above, the shaft 21 to which the guide roller 22 is attached is fixed to the shaft by the abutting portion 32d of the tip end of the leaf spring 32 in which the fixing portion 32a is fixed to the arm 29. Lower flange 24
While being inserted into the gap between the collar 25 and the collar 25, the adjustment screw 33 is inserted into the insertion hole 27 of the boss portion 28, and the adjustment screw 33 is screwed into the screw hole 34 of the arm 29 via the through hole 32b of the leaf spring 32. ..

Further, as shown in FIG. 2, when the adjusting screw 32 is rotated in a loosening direction (direction of arrow C), the abutting portion 32d of the leaf spring 32 causes the contact portion 32d of the leaf spring 32 to move to the lower surface of the lower flange 24. To the head 33a of the adjusting screw 33.
By pushing the lower flange 24 upward in the direction of arrow D within a range where the leaf spring 32 comes into contact with the leaf spring 32 and the biasing force of the leaf spring 32 is regulated, the height position of the guide roller 22 with respect to the arm 29 (arrow The adjustment can be performed so that the (position in the D direction) becomes higher.

Further, as shown in FIG. 3, when the adjusting screw 33 is rotated in the tightening direction (arrow E direction), the leaf spring 32 is resisted by the biasing force of the leaf spring 32 and the leaf spring is caused by the head portion 33a of the adjusting screw. Three
2 is pressed and held down, and the abutment portion 32d of the leaf spring 32 pushes down the collar 25 in the arrow F direction, whereby the height position of the guide roller 22 with respect to the arm 27 (arrow F
The position can be adjusted so as to lower the position (direction position).

After adjusting the guide roller 22 to a desired height position, the fixing screw 30 screwed into the screw hole 31 of the boss portion 28 is tightened to fix the shaft 21 at the tip of the fixing screw 30. The guide roller 22 is supported at a desired height position by pressing the side portions and sandwiching the shaft 21 with the inner peripheral portion of the insertion hole 27 and fixing it to the boss portion 28. Is.

In the above operation, although the positions of the lower flange 24d of the contact portion 32d and the collar 25 are slightly different, the lower flange 24 and the collar 25 are fixed to the shaft 21. It does not perform any operation, and thus does not pose a particular problem for the purpose of adjusting the height position of the guide roller 22.

In the above embodiment, the leaf spring 3 is used.
By adjusting the height position of the guide roller 22 by utilizing the biasing force of 2, it is possible to suppress the height dimension of the boss portion 28 to be small, but the height of the guide roller is increased without using a leaf spring. A guide roller adjustment capable of keeping the height dimension of the boss portion, which is the support, small while ensuring a sufficient adjustable range of the position is described below as another embodiment with reference to FIGS. 6 to 9.

The guide roller device of the present invention comprises a shaft 4
1, a guide roller 42 for guiding the running of a magnetic tape (not shown) is interposed between the upper flange 43 and the lower flange 44.
The guide roller 42 is rotatably attached to the shaft 41, and is attached to the lower surface (the surface opposite to the guide roller 42) side of the lower flange 44 of the shaft 41 by fixing each of them. Threaded portion 45 on the inner peripheral surface
Is fixed to a cylindrical height adjusting portion 46 having, and also has an insertion hole 47 through which the shaft 41 is inserted,
A cylindrical boss portion 48, which is a support having an outer peripheral surface provided with a screw portion 52 to be screwed into the screw portion 45 of the height adjusting portion 46, is attached to an arm 49 for supporting and fixing the guide roller device. Is.

In the above structure, the boss portion 48 presses the side portion of the shaft 41 inserted into the insertion hole 47 into pressure contact with the inner peripheral portion of the insertion hole 47 to press and hold the shaft 41. It is provided with a screwing hole 51 into which a fixing screw 50 fixed to the portion 48 is screwed.

Further, the height adjusting section 46 is the height adjusting section 4
The bottom surface of 6 (closed surface on the lower flange 44 side) is the lower flange 4.
It is fixed to the shaft 41 while being in contact with the lower surface of No. 4.

In the guide roller device constructed as described above, the shaft 41 to which the guide roller 42 is attached is inserted into the insertion hole 47 of the boss portion 48, and the shaft 4 is inserted.
The screwing portion 45 of the height adjusting portion 46 fixed to 1 is screwed into the screw portion 52 of the boss portion 48, and the upper flange 43 fixed to the shaft 41 is rotated in the clockwise / counterclockwise direction (indicated by arrow G). When the guide roller 42 is rotated, the screwing portion 46 is rotated with respect to the screwing portion 52.
After adjusting the height position (position in the direction of arrow H) with respect to the arm 49, the fixing screw 50 screwed into the screw hole 51 of the boss portion 48 is tightened, so that the tip end portion of the fixing screw 50 is tightened. The side portion of the shaft 41 is pressed into contact with the insertion hole 47.
The shaft 41 is pressed and held by the inner peripheral part of the shaft 41 to be fixed to the boss 48, and the guide roller 42 is supported at a desired height position.

In the above operation, the upper flange 43 is rotated in the clockwise direction (the direction in which the screw portion 45 of the boss portion 48 is tightened with respect to the screwing portion 45 of the height adjusting portion 46), so that the shaft 41 is attached to the shaft 41. The adjustment is performed so that the height position of the attached guide roller 42 with respect to the arm 49 is lowered.

Further, the guide roller device in the above-described embodiment of the present invention has the insertion hole 2 for receiving the shafts 21 and 41.
Since the length dimension of 7, 47 can be secured only by the height dimension of the boss portions 28, 48, the accuracy of the verticality of the guide rollers 22, 42 with respect to the arms 29, 49 can be improved and the guides It is also possible to increase the proof stress of the rollers 22, 42 against the tape load applied in the horizontal direction.

[0026]

In the first aspect of the guide roller device of the present invention, the biasing means biases the guide roller in the adjusting direction of the height position, and the adjusting means biases the biasing means. Since the height position of the guide roller is adjusted by adjusting, the height dimension of the support can be suppressed to be small while ensuring a sufficient height position adjustment range of the guide roller. It is possible to cope with the thinning of devices and the like.

Further, in the second aspect of the invention, the screwing portion of the inner peripheral surface of the height adjusting portion provided on the shaft is screwed into the screw portion provided on the outer peripheral surface of the support to rotate the shaft. As a result, since the height position of the guide roller attached to the shaft is adjusted, the height dimension of the support can be suppressed to be small while ensuring a sufficient height position adjustment range of the guide roller. It is possible to support thinning of the recording / reproducing device and the like.

[Brief description of drawings]

FIG. 1 is a partial sectional side view showing an embodiment of a guide roller device of the present invention.

FIG. 2 is a partial cross-sectional side view showing a state where the guide roller in the embodiment of the guide roller device of the present invention is adjusted high.

FIG. 3 is a partial cross-sectional side view showing a state where the guide roller is adjusted to be low in one embodiment of the guide roller device of the present invention.

FIG. 4 is an exploded plan view of essential parts showing an embodiment of a guide roller device of the present invention.

FIG. 5 is an exploded side sectional view of essential parts showing an embodiment of a guide roller device of the present invention.

FIG. 6 is a partial cross-sectional side view showing another embodiment of the guide roller device of the present invention.

FIG. 7 is an exploded partial cross-sectional side view of an essential part showing another embodiment of the guide roller device of the present invention, and an exploded bottom plan view of the essential part.

FIG. 8 is an exploded plan view of essential parts showing another embodiment of the guide roller device of the present invention.

FIG. 9 is an exploded side view of essential parts showing another embodiment of the guide roller device of the present invention.

FIG. 10 is a partial cross-sectional side view showing a conventional guide roller device.

FIG. 11 is an exploded side view showing a conventional guide roller device.

[Explanation of symbols]

 21, 41 Shaft 22, 42 Guide roller 28, 48 Boss part 32 Leaf spring 33 Adjusting screw 45 Screwing part 46 Height adjusting part 52 Screw part

Claims (2)

[Claims] 1. A guide roller device provided with a guide roller for guiding a magnetic tape, such as a magnetic recording / reproducing device,
A biasing means for biasing the guide roller in a height position adjusting direction; and an adjusting means for adjusting the height position of the guide roller by adjusting the biasing force of the biasing means. Guide roller device. 2. A guide roller device including a guide roller for guiding a magnetic tape, such as a magnetic recording / reproducing device,
From a screwing portion on the inner peripheral surface of a height adjusting portion provided on the shaft to which the guide roller is attached, and a screw portion screwing on the screwing portion provided on the outer peripheral surface of a support body that supports the shaft. A guide roller device having a height adjusting mechanism.