JPH04129051A - Capstan shaft adjusting device for tape player - Google Patents

Abstract

PURPOSE:To simplify the adjusting operation by varying the interval between a pair of supporting rods and bending a substrate to adjust the degree of parallel between capstan shafts. CONSTITUTION:Supporting rods 15a and 15b are stood in right and left outside positions of capstan shafts 5a and 5b, and base ends of a pair of shaft rods 16a and 16b are attached to their upper end parts with attaching pieces 17a and 17b between them, and screw parts 18a and 18b which are formed in free end parts of shaft rods 16a and 16b and are different in turning direction from each other are engaged with a shaft cylinder 20 having tapped holes 19a and 19b different in turning direction from each other. A substrate 1 is projectingly bent at the time of adjustment to extend the interval between upper ends of the pair of right and left supporting rods 15a and 15b and is recessingly bent at the time of adjustment to narrow this interval by a turnbuckle mechanism as the adjusting means, and inclination or the like of capstan shafts 5a and 5 due to bending or distortion of the substrate or caulking is straightened to adjust the degree of parallel between the pair of right and left capstan shafts 5a and 5b. Thus, the adjusting operation is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This application relates to an adjusting device for adjusting the parallelism of a capstan shaft in a tape player.

BACKGROUND ART In general, in an auto-reversing tape player, when the capstan shaft is tilted to some extent due to warpage or distortion in the board or due to an error in crimping the capstan shaft to the board, the capstan shaft Due to the inclination of the capstan shaft that occurs when the pinch roller is pressed due to the gap in the bearing part of the tape, the traveling path changes greatly in the height direction between forward and reverse feeding of the tape, causing the tape to There was a habit of damaging the azimuth or making it impossible to adjust the azimuth.

Therefore, conventionally, the upper ends of the capstan holding members that hold the capstan shafts are connected to each other by a connecting rod, and by horizontally rotating this connecting rod around one capstan shaft, An adjusting device that adjusts the parallelism of a pair of capstan shafts by imparting an axial inclination is known, for example, in Japanese Utility Model Application Publication No. 57-191955.

Problems to be Solved by the Invention However, since the above-mentioned conventionally known capstan shaft is configured to adjust the inclination of the other capstan shaft with respect to one capstan shaft as a reference, the inclination of one capstan shaft itself is exists, the parallelism of the pair of capstan axes will be adjusted while the inclination remains, and the perpendicularity of the capstan will not be obtained. This has disadvantages in that it cannot be solved, has a complicated structure, and has troublesome adjustment operations.

Means for Solving the Problems In order to improve the deficiencies of the above-mentioned conventional products, the present application provides the following:
A pair of support rods facing each other in the tape running direction with the magnetic head in the middle are provided on a substrate equipped with a capstan shaft, and these support rods are connected between the support rods so that the spacing between them can be varied widely. The present invention is characterized in that an adjusting means is provided for adjusting the parallelism of the capstan axis by applying deflection to the substrate, and the adjusting means includes a turnbuckle mechanism and a case in which the helical direction is different. The helical direction is the same and the helical pinch is different from the case where the threaded portions are screwed onto a pair of supporting rods and are externally rotatable. In some cases, the shaft rod has a pair of threaded portions at both ends, and these threaded portions are screwed into a pair of support rods, which can be rotated externally. The actuation plate has a mating hole, and an eccentric cam is rotatably attached to the other support rod and engages with the fitting hole, and one end is rotatable to the one support rod, and , fixedly supported in the axial direction,
The other end may consist of an externally rotatable shaft rod screwed into the other support rod.

Further, in the above, there are cases in which a pair of support rods are provided at the outer positions of the left and right capstan shafts, and cases in which a pair of support pieces are provided at positions inside the left and right capstan shafts, respectively.

Function: When the adjustment means is used to adjust the distance between the upper ends of the pair of left and right support rods to be wider, the board is bent in a convex shape, and when the adjustment means is adjusted to narrow the distance between the upper ends of the pair of left and right support rods. In this case, the substrate is bent in a concave shape, and this bending corrects the warp or distortion of the substrate or the inclination of the capstan shaft due to crimping, and adjusts the parallelism of the pair of left and right capstan shafts.

Embodiment The following is a detailed explanation of the embodiment of the present application based on the drawings.
．． Figure 2 shows a front view when a turnbuckle mechanism is used as an adjustment means, and on the board (1) there is a hend plate (3) with a magnetic head (2), and a hend plate (3) located on the left and right sides of the hend plate (3). A pair of capstan shafts (5) a, (5) b whose lower ends are supported by bearings (4) a (4) b, and a pair of support shafts (6) a, (6) b rotatably pivot. A pinch roller (8) is attached to the free end and presses against the corresponding capstan shaft (5)a, (5)b by means of a bullet vA (7).
) a, (8) a pair of brackets (9) a, with b;
(9) b are each equipped with a capstan shaft (
At the lower ends of 5) a and (5) b, flywheels (10) a and (10) b and drive gears (11) a and (11) b integrated therewith are respectively pivoted. Tape players with similar configurations are well known.

In the tape player of the conventional configuration described above, the present invention provides supporting rods (15) a and (15) b that are erected at the left and right outer positions of the capstan shafts (5) a and (5) b, respectively, and the upper ends thereof are The respective proximal ends of the pair of shaft rods (16)a, (16)b are vertically rotatably attached via mounting pieces (17)a, (17)b, and each shaft rod (16)a,
The threaded portions (18)a, (1B)b formed at the free ends of (16)b with different helical directions are provided with threaded holes (19)a, (19)b with different helical directions. It is preferably screwed onto a shaft cylinder (20) having a polygonal outer periphery.

When the shaft cylinder (20) is rotated, the upper ends of the left and right support rods (15)a and (15)b are varied widely and narrowly, and their axes are tilted, and due to this tilt, Board (1)
is forcibly deflected.

In other words, when rotating the shaft cylinder (20) to widen the distance between the upper ends of the pair of left and right support rods (15)a and (15)b, as shown in FIG. When rotating the shaft cylinder (20) so that it bends convexly and narrows the distance between the upper ends of the pair of left and right support rods (15)a and (15)b, as shown in Fig. 2, The board (1) is bent in a concave shape, and due to this bending, if there is any warpage or distortion in the board (1), the warp or distortion is forcibly corrected, and the capstan shafts (5) a, (5) If b is tilted during caulking, it will be corrected vertically by the deflection of the board (1), and the gap existing in the bearings of the capstan shafts (5) a and (5) b will prevent the pinch from occurring. roller (8) a,
(8) Capstan shaft (5) a that occurs when pressing b
, (5) Based on the direction that resists the slope of b! This can be reduced by bending (1) in advance, and since these adjustments are made overall for the pair of capstan shafts (5) a and (5) b, the parallelism Extremely effective for adjustment.

FIG. 3 shows a second embodiment of the adjustment means, and this configuration has threaded portions (22) a and (22) b having different helical directions at both ends of a single shaft rod (21). These threaded parts (22)a and (22)b are attached to the left and right support rods (22)a and (22)b, respectively.
15) A rotating part (23) that is screwed onto the upper end of (15) a and (15) b, respectively, and that is externally operated by engaging a tool or the like at one end of the shaft rod (21). By the rotation of the rotation operation part (23), the support rods (15)a, (1
5) The distance between the upper ends of b can be varied widely.

FIG. 4 shows a third embodiment of the adjustment means, and this configuration has threaded portions ( 26)a,
(26)b is the left and right support rod (15)a, (15
) b, respectively, and a rotating operation part (
27), and according to this configuration, one rotation of the shaft rod causes the upper ends of the support rods (15) a and (15) b to move in a direction corresponding to the difference in the helical pinch of the left and right helical parts. Since the spacing between the parts can be varied widely, minute adjustments can be made.

Fig. 5.6 shows a fourth embodiment of the adjustment means, and this configuration has a mounting piece (
A long actuating plate (31) with one end attached via a
) The lower surface of an eccentric cam (34) has a fitting hole (32) formed at the other end thereof, and has a rotation operation portion (33) on the upper surface at the upper end of one support rod (15)a. A screw shaft (35) protruding from the
are screwed together, and the eccentric cam (34) is fitted into the fitting hole (32). According to this configuration, when the rotation operation part (33) is rotated with a tool or the like, Henshin cam (34)
The distance between the upper ends of the left and right support rods (15)a and (15)b is adjusted to be wide or narrow.

FIG. 7 shows a fifth embodiment of the adjustment means, in which a collar piece (36) is attached to the upper end of one support rod (15) a.
One end of a single shaft rod (37) is inserted through it so that it is free in the rotational direction and fixed in the axial direction, and the threaded part (38) provided at the other end is inserted into the other support rod ( 15) It is screwed to the upper end part of b and is provided with a rotation operation part (39) at one end. According to this configuration, the rotation operation part (39)
By rotating the pair of support rods (15) a, (
15) The interval between the upper ends of b is adjusted to be wide or narrow.

In addition, in each of the above-mentioned embodiments, the left and right support rods (15) a
, (15)b to the left and right capstan shafts (5)a,
Although the case where the capstan shafts (5) b are installed upright at the outside position is shown, it is also possible to install them upright at the inside positions of the capstan shafts (5) a and (5) b, as shown in Fig. 8. As shown in Figures 9 and 10, the support rods (40)a and (40)b are connected to the substrate (
1) may be erected by making a cut line (41) and cutting and raising it along this cut line (41). In this case, the support rods (41) a and (41) b are set in the direction in which they face each other. It is cut and raised in the right angle direction, and the configuration shown in the first embodiment is applied as the adjustment means.

Effects of the Invention As described above, according to the present application, the substrate provided with the capstan shaft is forcibly bent in a concave or convex shape, and the pair of left and right capstan shafts are adjusted simultaneously. Because of this, it is extremely effective for adjusting the parallelism and perpendicularity of the capstan axis, and the adjustment operation is easy.Also, since the board is forcibly bent, it may be constructed from a thin plate material. In particular, according to the configurations described in claims 4 and 5, minute adjustments are possible, and according to the configuration described in claim 9, the shaft rod can be rotated from its axial direction, that is, from its lateral position. Therefore, it has the advantage that adjustments can be made after the tape player is assembled.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and FIG. 1.2 is a front view showing the state during adjustment, FIG. 3 is a front view of the second embodiment, and FIG. 4 is a front view of the third embodiment. 5 is a front view of the fourth embodiment, FIG. 6 is a partial top view thereof, FIG. 7 is a front view of the fifth embodiment, FIG. 8 is a front view of the sixth embodiment, and FIG. 9 is a front view of the sixth embodiment. Embodiment 7 is a front view, and FIG. 10 is a partial top view showing the state before cutting and raising. In the figure, (1) is the substrate, (2) is the magnetic head, and (5) a(
5) b is the capstan shaft, (8) a, (8) b is the pinch roller, (15) a, (15) b is the support rod, (1
6)a, (16)b, (21), (25
), (37) is the axis rod, (17)a, (17)b
, (30) is the mounting piece, (18)a, (18)b
, (22)a, (22)b, (26)a,
(26)b, (38) spring part, (20) is the shaft cylinder, (23). (27), (33), (39) are rotating operation parts, (3
1) is an actuation plate, (32) is a fitting hole, (34) is an eccentric cam, and (40)a and (40)b are support rods. Patent applicant Tuner Co., Ltd.

Claims (9)

[Claims] (1) A pair of support rods are provided on a board equipped with a capstan shaft, facing each other in the tape running direction with the magnetic head in the middle, and these are connected between the support rods, and the distance between them is wide and narrow. 1. An adjusting device for a capstan shaft in a tape player, comprising an adjusting means for adjusting the parallelism of the capstan shaft by applying deflection to the substrate by varying the capstan shaft. (2) The capstan shaft adjusting device for a tape player according to claim 1, wherein the adjusting means comprises a turnbuckle mechanism. (3) The adjusting means comprises a shaft rod which has a pair of threaded portions with different helical directions at both ends, and which is screwed into a pair of support rods and which can be rotated externally. Capstan shaft adjustment device for tape players. (4) The adjusting means has a pair of threaded parts at both ends with the same helical direction and different helical pitches, and is capable of external rotation operation by screwing these threaded parts into a pair of support rods, respectively. 2. The capstan shaft adjustment device for a tape player according to claim 1, comprising a shaft rod. (5) the adjustment means has one end attached to one support rod;
2. A capstan for a tape player according to claim 1, comprising: an actuating plate having a fitting hole at the other end; and a centripetal cam rotatably attached to the other support rod and engaging with the fitting hole. Axis adjustment device. (6) The adjustment means is an externally rotatable shaft that is rotatably supported at one end and fixed in the axial direction on one support rod, and the other end is screwed into the other support rod. 2. The capstan shaft adjustment device for a tape player according to claim 1, comprising a rod. (7) A capstan shaft adjustment device for a tape player according to any one of claims 1 to 6, wherein a pair of support rods are provided at outer positions of the left and right capstan shafts, respectively. (8) The capstan shaft adjusting device for a tape player according to any one of claims 1 to 6, wherein a pair of support rods are provided at inner positions of the left and right capstan shafts, respectively. (9) The capstan shaft adjustment device for a tape player according to claim 3, 4 or 6, wherein an externally operable rotary operation section is provided at one end of the shaft rod.