JPH0652617B2 - Card carrier - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an information recording / reproducing apparatus for performing processing such as reading information recorded on a card or writing information on the card, and more particularly to an optical recording / reproducing apparatus as a card. The present invention relates to a card carrier of an optical information recording / reproducing device that uses a card.

[Conventional technology]

Conventionally, a card-shaped optical card has been proposed as a recording medium of an optical information recording / reproducing apparatus that writes information using a light beam (laser beam) and reads recorded information using the light beam. On the other hand, in the above-mentioned optical information recording / reproducing apparatus, in order to read or write the information recorded on the optical card, it is necessary to move the optical card relative to the optical head for writing or reading the information. is there. Therefore, as an optical information recording / reproducing apparatus using an optical card, a card conveying apparatus 1 as shown in the conceptual perspective view of FIG. 7 has been conventionally proposed.

This conventional card transporting device 1 includes a pair of guide shafts 2 and 3 which are arranged in parallel with each other at a predetermined interval and are directed in the same direction, and the pair of guide shafts 2 and 3 on which the guide shafts are mounted. A table 4 that travels back and forth along a few extending directions.
The optical card 5 is positioned and supported on the table 4, and reciprocates integrally with the table 4 in the direction of arrow A.

On the other hand, a pair of bearing members 6 and 7 are fixed to the lower surface of the table 4 in parallel with each other, and bearing holes 6a into which the guide shafts 2 and 3 are fitted and inserted, respectively. 7a are formed one by one.

Then, the table 4 reciprocates along the extending direction (direction of arrow A) of the guide shafts 2 and 3 by a table moving means (not shown) such as a warm gear.

On the other hand, the optical head 8 is supported by a guide shaft 9 which is arranged so as to be parallel to and perpendicular to the pair of guide shafts 2 and 3 of the table 4, and the optical head 8 has a worm gear 10. The drive means consisting of the guide shaft 9
Along the direction perpendicular to the moving direction of the table 4 (arrow B
Direction).

The optical head 8 is recorded on the upper surface of the optical card 5 by the relative movement of the above-described reciprocating movement of the table 4 and the optical head 8 traveling in a direction perpendicular to the moving direction of the table 4. The surface of the area 5a is scanned to read information, and the optical head 8 writes information in the recording area 5a.

The recording width (track pitch) of a recording unit (hereinafter referred to as a pit) recorded in the recording area 5a of the optical card 5 is extremely narrow (about 10 to 12 μm). Therefore, when writing and reading information, a table is used. It is required that the relative alignment accuracy between the optical head 4 and the optical head 8 is extremely high.

[Problems to be Solved by the Invention]

By the way, according to the above-described conventional traveling apparatus 1, as shown in FIG. 8 which is a longitudinal sectional view of a main portion of FIG. 7, the bearing holes 6a, 7a of the bearing member portions 6, 7 fixed to the lower surface of the table 4 are shown. Since the diameter L of the guide shafts 2 and 3 is fitted and the smooth sliding along the guide shafts 2 and 3 is ensured, the fitting tolerance is naturally larger than the diameter l of the guide shafts 2 and 3. Is slightly larger in the range of, and therefore, the bearing hole 6a,
There is always play between the 7 and the guide shafts 2, 3 due to the difference in diameter.

However, the bearing holes 6a, 7a and the guide shafts 2, 3 described above are
When there is play between the table 4 and the table 4, the table 4 is guided within the above-mentioned play range as shown in FIGS. 9 and 10 due to externally applied vibration and vibration of the drive system. There is a possibility that the posture may be changed in the vertical direction with respect to the extending direction of the shafts 2 and 3.

Further, the posture change of the table 4 is not limited to the vertical direction with respect to the extending direction of the guide shafts 2 and 3, but is within the range of the play as shown in FIGS. 11 and 12 which are plan sectional views of the main part of FIG. Therefore, the table 4 may change its posture in the left-right direction with respect to the extending direction of the guide shafts 2, 3. For this reason, the relative alignment accuracy between the table 4 and the optical head 8 is lowered, and there is a possibility that normal reading and writing of information by the optical head 8 may become impossible.

In view of the above-mentioned circumstances, it is an object of the present invention to provide a card transport device that prevents the table on which the card is run from changing its posture as much as possible other than the running direction.

[Means for Solving the Problems]

In order to achieve the above-mentioned problems, the present invention has a table for holding a card, at least a pair of bearing holes formed in the table, and a guide shaft fitted in the bearing hole. In a card transfer device configured to reciprocate along the table, the card is extended to the left and right around the guide shaft in parallel with the guide shaft and in the same direction as the extending direction of the guide shaft. A pair of shafts are provided, and a plate spring that is pressed against the shaft and slides on the shaft as the table travels is fixed to the table.

[Action]

According to the above-described card carrier, the table moves in one direction relative to the guide shaft due to the pressing force of the leaf springs that are in pressure contact with the pair of shafts. The specific inner peripheral surface of the bearing hole into which the guide shaft is inserted is always brought into close contact with each other, so that the play between the bearing hole and the guide shaft formed based on the difference in diameter between the bearing hole and the guide shaft. Is absorbed as much as possible, and the table always moves while being positioned at a specific reference position on the guide shaft.

〔Example〕

An embodiment of the card carrier according to the present invention will be described in detail below.

FIG. 1 is a conceptual perspective view showing a card carrier 20 according to the present invention, and the same parts as those in FIG. 7 are designated by the same reference numerals.

The card carrier 20 has a pair of bearing members 21 and 22 fixed to the lower surfaces of the front and rear ends of the table 4 and on the central axis in the longitudinal direction of the table 4. Further, bearing holes 21a and 22a are formed in the bearing members 21 and 22 along the central axis of the table 4 in the longitudinal direction.
A single guide shaft 23 for guiding the table 4 along its longitudinal direction is fitted and inserted in a and 22a.

On the other hand, at a left-right symmetrical position with respect to the guide shaft 23, a predetermined space is provided from the guide shaft 23, and is parallel to the guide shaft 23 and in the same direction as the extending direction of the guide shaft 23. A pair of sliding shafts 24, 25 are provided. A pair of leaf springs 26, 27 are fixed to the lower surface of the table 4 at the front end side and the rear end side of the table 4, and the lower surfaces of both end portions 26a, 27a of the respective leaf springs 26, 27 have the pair of sliding shafts. 24, 25 are constantly in pressure contact with the upper surface.

Although illustration is omitted, it goes without saying that an optical card and a holder for holding the optical card on the table 4 are arranged on the upper surface of the table 4 as in the conventional case.

On the other hand, the table moving means 30 for reciprocating the table 4 along the guide shaft 23 is an elastic belt 31 stretched between the lower surfaces of the pair of bearing members 21 and 22.
A drive shaft 33 disposed adjacent to the upper surface of the belt 31 and rotated by a motor 32, and adjacent to the lower surface of the belt 31 facing the drive shaft 33, and the belt 3
A pinch roller 34 which is arranged on the lower surface of 1 so as to be able to come into contact with and separate from it;
The table 4 comprises a roller separating / contacting means 35 for pressing the pinch roller 34 against the lower surface of the belt 31 when the table 4 is running and for separating the pinch roller 34 from the lower surface of the belt 31 when the table 4 is not running. ing. Of these, the pinch roller 34 has a shaft 36 at one end.
A pair of arms 37, which are rotatably supported around, are rotatably supported at substantially intermediate portions, and a roller 38 is rotatably supported at the tip of the arm 37. The roller separating / connecting means 35 is connected to a slider 39 slidably fitted on the lower surface of the roller 38 and having an upper surface of an arc shape, and an operating rod 40 of the slider 39, and the slider 39 is connected to the guide shaft. 23 and a solenoid plunger 41 that slides along the extending direction.

Next, the operation of the table moving means 30 described above will be described.

As shown in FIG. 2 which is a longitudinal sectional view of an essential part of FIG. 1, when the table 4 is moved, the slider 41 is slid to the right side of the drawing by the plunger 41 of the roller separating / contacting means 30. The roller 38 supported on the tip of the arm 37 for supporting the arm 37 rotates clockwise about the shaft 36 along the arc-shaped upper surface 39a formed on the slider 39, and thus is supported on the arm 37. The pinch roller 34 moves upward and comes into pressure contact with the lower surface of the belt 31.
In this way, the pinch roller 34 moves upward and the belt 3
When pressed against the lower surface of 1, the elastic belt 31 moves to the drive shaft 3
Since the drive shaft 33 is rotated in this state, the table 4 reciprocates along the extending direction of the guide shaft 23. When the table 4 travels back and forth in this manner, the drive shaft 3
Even if vibration is generated in 3 and the pinch roller 34, the vibration is absorbed by the elastic belt 31, so that the vibration is transmitted to the table 4 as much as possible.

On the other hand, as shown in FIG. 3 which is a longitudinal cross-sectional view of the main part of FIG. 1, when the table 4 is not traveling, the plunger 41 of the separating / connecting means 30 is used.
When the slider 39 is slid to the left side in the drawing by the, the roller 38 supported by the tip of the arm 37 that supports the pinch roller 34 is centered on the shaft 36 along the arc-shaped upper surface 39a formed on the slider 39. Since it rotates counterclockwise, the pinch roller 34 supported by the arm 37 moves downward and the pressure contact with the belt 31 is released.
Therefore, even if the drive shaft 33 rotates, the table 4 does not reciprocate.

According to the table moving means 30 using the elastic belt 31 described above, when the elastic belt 31 is constantly pressed and sandwiched between the drive shaft 33 and the pinch roller 34, the elastic belt 31 is used. The drive shaft 33 and the pinch roller 34 adhere to each other due to aging, and when the table 4 is about to travel, the adhesion may cause vibration of the belt 31 at the time of starting and traveling. However, according to the roller separating / connecting means 35 described above, the elastic belt 31, the drive shaft 33, and the pinch roller 34 do not come into close contact with each other when the table 4 is not running, and therefore, adhesion based on such secular change is possible. As a result, the vibration of the belt at the time of starting and running due to the adhesion of the respective elements constituting the table moving means is eliminated as much as possible.

Next, the operation of the above-described card carrier 20 will be described, and the configuration will be described in more detail.

As shown in FIG. 4 which is a longitudinal sectional view of a main part of FIG. 1, the bearing holes 21 of the bearing members 21 and 22 fixed to the lower surface of the table 4 are shown.
The diameters L of a and 22a are, of course, within the fitting tolerance range than the diameter l of the guide shaft 23 in order to fit and insert the guide shaft 23 and ensure smooth sliding along the guide shaft 23. Are formed slightly larger than each other. Therefore, there is play between the bearing holes 21a and 22a and the guide shaft 23 due to the difference in diameter.

On the other hand, leaf springs 26 and 27 are fixed to the lower surface of the table 4, and both end portions 26a of the leaf springs 26 and 27 are fixed.
Since 27a is in pressure contact with the upper surfaces of the sliding shafts 24 and 25, the table 4 moves upward relative to the guide shaft 23 by the pressing force of the leaf springs 26 and 27. Therefore, as shown in FIG. 5 which is a side view of FIG. 4, the specific portion of the guide shaft 23, that is, the lower end 23a of the outer peripheral surface of the guide shaft 23 is the specific portion of the bearing holes 21a and 22a, that is, the bearing holes 21a and 22a.
It is always in pressure contact with the lower ends 21b, 22b of the inner peripheral surface.

Therefore, when the table 4 travels along the guide shaft 23, the table 4 is formed between the bearing holes 21a and 22a and the guide shaft 23 due to factors such as externally applied vibrations and drive system vibrations (fourth play). Even if the posture is changed within the range shown in the drawing, the table 4 is pressed by the leaf springs 26 and 27, and the lower end 23a of the outer peripheral surface of the guide shaft 23 and the lower end 21b and 22b of the inner peripheral surface of the bearing holes 21a and 22a. Since the positions of the table 4 are forcibly positioned at the reference position where they and the table 4 are always in close contact with each other, the posture of the table 4 does not change within the play range, and even if the posture of the table 4 changes, the leaf spring 26,
Due to the pressing force of 27, the lower end 2 of the outer peripheral surface of the guide shaft 23 as shown in FIG. 6 shown in FIGS.
3a and the lower ends 21b, 22 of the inner peripheral surfaces of the bearing holes 21a, 22a
It is forcibly returned to the reference posture in which it is always in close contact with b.

Although two leaf springs are used in the above embodiment, the present invention is not limited to the above embodiment and may be one or two or more. Further, in the above embodiment, one guide shaft is used for the table, but it is of course possible to apply the present invention to a card transporting device using a plurality of guide shafts. In addition, in the above embodiment, particularly, the present invention is applied to a card carrying device for carrying an optical card, but of course the present invention is not limited to the above embodiment, a magnetic card is used, for example. It may be applied to a card carrier of an information recording / reproducing apparatus which uses a magnetic head as a writing / reading head.

〔The invention's effect〕

As described above, in the card transport device according to the present invention, the card holding table that runs along the guide shaft is forcibly positioned in the reference posture in which it is brought into close contact with a specific portion of the guide shaft, and this reference posture is maintained. In addition, since the table is made to travel along the guide axis, it is possible to eliminate as much as possible the change of the posture of the table in a direction other than the traveling direction along the guide axis. The relative alignment accuracy between the table and the storage area of the card is improved, so that malfunctions of reading and writing information by the read and write heads are eliminated as much as possible, and accurate information reading is performed. Further, it is possible to provide an information recording / reproducing device which performs a writing operation.

[Brief description of drawings]

FIG. 1 is a conceptual perspective view of a card carrier according to the present invention, FIGS. 2 and 3 are longitudinal cross-sectional views of the main part of FIG. 1, and FIG. 4 is a vertical cross-sectional view of the main part of FIG. FIG. 5 is a side view of FIG. 4, FIG. 6 is a cross-sectional plan view of an essential part of FIG. 4, FIG. 7 is a conceptual perspective view showing a conventional card carrier, and FIGS. It is a principal part sectional view of FIG. 7 which shows a change. 4 ... table, 20 ... card carrier, 21a, 2
2a ... Bearing hole, 23 ... Guide shaft, 24,25 ...
Shaft, 26, 27 ... Leaf spring.

Claims (1)

[Claims] 1. A table for holding a card, a bearing hole formed in the table, and a guide shaft fitted in the bearing hole, and the table is run along the guide shaft. In the card transport device, a pair of shafts disposed at positions facing each other about the guide shaft and extending in the same direction as the extending direction of the guide shaft, and fixed to the table, and one end of the pair of shafts. And a leaf spring that is in pressure contact with one of the shafts and the other end is in pressure contact with the other of the pair of shafts.