JPS63166055A - Supporting mechanism for pinch roller - Google Patents

Abstract

PURPOSE:To enable the direction of a pinch roller orthogonal to an adhesive direction to be corrected and to enable the pinch roller to be adhered with pressing with a capstan shaft and traveled, by supporting the pinch roller with a supporting member, providing a U-shaped holding frame which holds the supporting member in such way that it can be turned rotatably freely against a supporting shaft, forming an insertion hole in an elongated hole, and enabling the supporting shaft to be moved. CONSTITUTION:The elongated hole extending in an orthogonal direction to the adhesive direction of the pinch roller 5 is formed at the intermediate part of a pinch roller supporting member 3, and the supporting shaft 1 is inserted in the elongated hole, and also, at an opposite side to the arranging position of the pinch roller 5 sandwiching the supporting shaft 1, a spring 7 is provided so as to pull the pinch roller supporting member 3 and the U-shaped holding frame 2. Also, an adjusting screw 8 which functions to separate the pinch roller supporting member 3 from the U-shaped holding frame 2 against the spring 7 is provided. In such a way, by moving the U-shaped holding frame 2 in the adhesive direction against the supporting shaft 1 by the adhesive force with pressing of the pinch roller 5, and tightening/ untightening the adjusting screw, the mounting corner part of the U-shaped holding frame 2 and the pinch roller supporting member 3 can be adjusted, and adjustment for an angle in the direction orthogonal to the adhesive direction of the pinch roller is performed.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a support mechanism for a pinch roller of an audio, video, etc. tape player, and in particular to an improved pinch roller support mechanism. This is to ensure accurate crimping between the pinch roller and the capstan shaft.

(Prior Art) With recent technological innovations, the performance of audio, video, and other tape players has improved. Therefore, the accuracy of the pressure bonding between the capstan shaft and the pinch roller, which grip and run the tape, has a great effect on image quality and sound quality. In other words, in a tape player, the capstan shaft is driven by a motor, and the pinch roller crimped onto the capstan shaft follows the capstan shaft to run the tape. However, when the pinch roller is crimped onto the capstan shaft, Furthermore, if the mounting angle of the pinch roller is incorrect, the other side of the pinch roller will not be able to completely follow and press the capstan shaft surface, and the tape will not be fed evenly over the entire width of the tape, resulting in unstable tape running.

(Problems to be Solved by the Invention) In order to solve the above problems, a slight gap is provided between the pinch roller and the shaft supporting it, and a slight gap is provided between the pinch roller shaft and the capstan shaft. A self-aligning type pinch roller has been proposed that allows the pinch roller to follow the capstan shaft even if there is deviation.

However, in order for the pinch roller to rotate smoothly, there is a certain limit to the gap provided between the shaft and the pinch roller, and if the angle of the pinch roller deviates beyond a certain degree, this means is useless. Moreover, in the self-aligning type,
The inclination in the pressing direction can be corrected by the pressing force applied to the pinch roller, but the deviation (inclination) in the direction perpendicular to the pressing direction cannot be corrected.

The present invention was proposed in order to eliminate the drawbacks of the conventional pinch roller support mechanism as described above. To provide a support mechanism for a pinch roller that can correct the deviation of the pinch roller, completely press the pinch roller to a capstan shaft, and allow the pinch roller to run.

"Structure of the Invention" (Means for Solving Problems) The pinch roller support mechanism of the present invention supports the pinch roller on the support member and also supports the U-shaped holding frame that holds the pinch roller support member. Rotatably mounted on the shaft,
The insertion hole of the cup-shaped holding frame is made into a long hole along the pressing direction of the pinch roller, and the support shaft is movable within this long hole. In addition, the present invention forms a long hole extending in a direction perpendicular to the pressing direction of the pinch roller in the middle part of the pinch roller support member, and inserts the spindle into the long hole and adjusts the installation position of the pinch roller. is on the opposite side of the spindle,
A spring is provided to pull the pinch roller support member and the U-shaped holding frame, and an adjustment screw is provided that acts against the spring in a direction to separate the pinch roller support member and the U-shaped holding frame. It is.

(Function) In the pinch roller support mechanism of the present invention, the angle of the pinch roller with respect to the pressing direction is corrected by moving the U-shaped holding frame with respect to the support shaft in the pressing direction due to the pressing force of the pinch roller. It will be done. Further, by tightening or loosening the adjustment screw, the mounting angle between the U-shaped holding frame and the pinch roller support member is adjusted, and the angle is adjusted in a direction perpendicular to the pressing direction of the pinch roller.

(Example) Hereinafter, an example of the present invention will be specifically described with reference to FIGS. 1 to 3.

1 to 3, a support shaft 1 is provided on a plate that moves on a board of a tape player, and a U-shaped holding frame 2 having insertion holes on the upper and lower surfaces of the support shaft 1 is rotatably attached to the support shaft 1. It is provided. The upper insertion opening provided in this U-shaped holding frame 2 is formed as a long hole 2a along the pressing direction of the pinch roller, and the support shaft 1 is provided so as to be movable within this long hole 2a. Note that the lower insertion hole is a normal round hole.

A pinch roller support member 3 is held in the U-shaped holding frame 2 by an engaging pin 4 so as to be rotatable in the vertical direction.

A long hole 3a is formed in the center of the pinch roller support member 3 and extends in a direction perpendicular to the pressing direction of the pinch roller, and the support shaft 1 is movably inserted into the long hole 3a. A pinch roller 5 is installed at one end of this pinch roller support member 3 so as to be rotatable with respect to a shaft 6. Also, on the opposite side of the support shaft 1 from the installation position of the pinch roller 5, there is a U-shaped A spring 7 is provided to pull the mold holding frame 2 and the pinch roller support member 3, and an adjustment that acts against the spring 7 in a direction to separate the U-shaped holding frame 2 and the pinch roller support member 3. A screw 8 is provided.

The operation of this embodiment having the above configuration is as follows.

In FIG. 2, when the pinch roller 5 is pressed against the capstan shaft 10 by the pinch roller suppressing member 9, even if the pinch roller 5 is tilted in the direction, the upper part of the mouth-shaped holding frame 2 By moving the support shaft 1 within the elongated hole 2a, the angle of the pinch roller support member 3 in the pressing direction is adjusted, and the pinch roller 5 body is completely pressed against the capstan shaft 10.

Further, as shown in FIG. 3, when the adjustment screw 8 provided on the U-shaped holding frame 2 is tightened, the adjustment screw engagement portion of the pinch roller support member 3 is pushed down, resisting the biasing force of the spring 7. As a result, the support shaft 4 becomes a fulcrum, the pinch roller support member 3 moves like a seesaw, and the pinch roller 5 moves upward. Conversely, when the adjustment screw 8 is loosened, force is applied upward while being biased by the spring 7, and the spindle 4 becomes a fulcrum and the pinch roller 5 moves downward, causing the pinch roller 5 to move in the crimping direction. The angle perpendicular to the pinch roller 5 is adjusted to completely press the pinch roller 5 onto the capstan shaft 10. In addition,
During such movement of the pinch roller support member 3, since the support member 3 and the support shaft 1 are inserted through the elongated hole 3a, the movement of the support member 3 is not hindered.

[Effects of the Invention] As described above, according to the present invention, it is possible to correct deviations in both angles in the direction orthogonal to the crimping direction of the pinch roller.
It is possible to provide a support mechanism for the pinch roller that can completely press the pinch roller onto the capstan shaft and allow the tape to run accurately.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the pinch roller support mechanism of the present invention, FIG. 2 is a side view showing the angle adjustment of the pinch roller in the pressing direction in the embodiment of FIG. FIG. 7 is a front view showing the angle adjustment of the pinch roller in the direction orthogonal to the pressing direction in the illustrated embodiment. DESCRIPTION OF SYMBOLS 1... Support shaft, 2... Kou-shaped holding frame, 3... Pinch roller support member, 4... Engagement pin, 5... Pinch roller, 6... Shaft, 7... - Spring, 8...adjustment screw, 9...pinch roller pressing member, 10...capstan shaft.

Claims (1)

[Scope of Claims] In a tape player: a. A U-shaped holding frame having insertion holes on the upper and lower surfaces is rotatably supported on a support shaft. b. The insertion hole of the U-shaped holding frame is made into a long hole along the pressing direction of the pinch roller, and the support shaft is movably inserted into the long hole. c. A pinch roller support member is held in a U-shaped holding frame so as to be rotatable in a direction orthogonal to the direction in which the pinch roller is pressed. d. An elongated hole extending in a direction perpendicular to the pressing direction of the pinch roller is formed in the intermediate portion of the pinch roller support member, and the support shaft is inserted into this elongated hole. e. Rotatably attach the pinch roller to the shaft provided at one end of the pinch roller support member. f. A spring for pulling the support member and the U-shaped holding frame is provided on the opposite side of the pinch roller support member from the installation position of the pinch roller across the support shaft. g. The pinch roller support member and the U-shaped holding frame are provided with adjustment screws that act in a direction that moves them apart against the spring. A pinch roller support mechanism characterized by the structural requirements a to g above.