JPH045481Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to a conveyor belt tension mechanism suitable for use in a card conveyance mechanism of a card processing device, etc., and in particular, to reduce card speed fluctuations and read information using a magnetic head. The jitter characteristics of the filter are improved.

[Conventional technology]

In recent years, various types of magnetic cards with information recorded on them have been used to input information, and card processing devices are being used in various fields accordingly. For confirmation operations, it is desirable to move the magnetic card back and forth, and for this purpose, the magnetic card conveyance mechanism is generally comprised of an endless belt that is stretched between rollers and circulates around it. This belt consists of a driving side belt and a driven side belt that is in contact with the driving side belt and rotates around due to the frictional force between them, and is configured so that the magnetic card is held and moved by these two belts. .
A predetermined tension is applied to the belt to prevent it from sagging. Further, the driven roller is movable toward and away from the conveyance roller in order to absorb the thickness of the magnetic card.

[Problem that the invention attempts to solve]

By the way, conventionally, a tension roller is provided as a tension mechanism to apply a predetermined tension to the belt, but such a card transport mechanism has the disadvantage that the number of rollers, shafts, and parts such as brackets are increased. .

Therefore, as a means to solve this inconvenience, the fourth method is
A tension mechanism as shown in the figure has been proposed (Utility Application No. 59-96108). That is, in this tension mechanism, a roller 2 to which one end of one conveyor belt 1 is tensioned is rotatably disposed on a first bracket 3, and the first bracket 3 is further rotated by a second bracket 4. The first bracket 3 is provided with a rotational behavior in the direction in which the conveyor belt 1 is brought into pressure contact with the other conveyor belt 6 by a spring 5, and the second bracket 4 is provided with another spring 7.
The conveyor belt 1 is provided with rotational behavior in the direction of applying tension to the conveyor belt 1, and although such a configuration has the advantage that a predetermined tension can be applied to the belt 1 without requiring a tension roller,
When the card 8 is fed between the rollers 2 and 9, the moving speed of the card 8 changes, and if the magnetic head 10 is placed close to the rollers 2, the information reading signal of the card 8 moves at a constant speed. Unlike the current waveform, this had the disadvantage of deteriorating jitter characteristics.

Therefore, as a result of considering and experimenting on this point,
It was found that there was a problem with the position of the pivot point A of the first bracket 3. That is, the space around the roller 2 is defined by the first imaginary line 1 passing through the center of both rollers 2 and 9.
2 and a second imaginary line 13 that passes through the center of the roller 2 and is orthogonal to the first imaginary line 12 and is approximately parallel to the belt 1. Rotating fulcrum A of bracket 3
is located within region I. Region I is selected as the region with the best assembly workability in relation to other mechanisms, parts, etc. In this positional relationship, the first bracket 3 receives a clockwise rotational moment T about the pivot point A due to the force of the spring 5. The card 8 moves from the bottom to the top in the figure, and the tip ends with the roller 2,
9, a driving force F is generated between the card 8 and the belt 1. If this driving force F is broken down into the direction of the rotation fulcrum A of the roller 2 and the direction perpendicular to this,
A rotational moment T ₁ is generated in the clockwise direction around the fulcrum A, which is composed of T ₂ and T ₁ . As a result, _T1 is applied to the roller 2 in addition to the conventional rotational moment T, which acts as a load and brakes the card 8.

In this case, if the distance between the roller 2 and the magnetic head 10 is set to be larger than the length of the card 8, the card 8 will be fed between the rollers 2 and 9 after reading the recorded information data, so that the speed fluctuation of the card 8 will not be affected by the data. Although this does not have any adverse effect on the reading of the image data, another inconvenience arises in that the conveyance path becomes longer, making it impossible to meet the demand for miniaturization.

[Means for solving problems]

The conveyor belt tension mechanism according to the present invention was developed to solve the above-mentioned problems, and includes a plurality of rollers, each of which is tensioned and faces each other, and cards are held and conveyed between them. a pair of belts, and a first bracket that is located on the side closer to the magnetic head and rotatably supports one of a pair of rollers through which the card is fed by the pair of belts when reading information recorded on the card. And in this first bracket,
a first spring that provides rotational behavior in a direction in which one belt stretched over the one roller is pressed against the other belt; a second bracket that rotatably supports the first bracket; The second bracket is provided with a second spring that imparts a rotational behavior in the direction of applying tension to the one belt, and the rotation fulcrum of the first bracket is connected to the first belt connecting the centers of the pair of rollers. Of the four areas partitioned by an imaginary line and a second imaginary line passing through the center of the one roller and substantially orthogonal to the first imaginary line, the area is closer to the magnetic head than the first imaginary line and It is located in an area including the side opposite to the card holding side of one belt.

[Effect]

In the present invention, the rotational fulcrum of the first bracket is located within the region that receives the rotational moment in the opening direction of the first bracket when the card arrives, thereby reducing the load on the card and preventing fluctuations in card speed. .

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 is a side view showing an embodiment of the tension mechanism according to the present invention, FIG. 2 is an exploded perspective view of the same mechanism,
FIG. 3 is a schematic configuration diagram of the card processing device.

First, the general structure of the card processing device will be explained based on FIG. 3. Reference numeral 20 denotes a card processing device, which includes a card insertion slot 21 provided on the front side and a card slot 21 located close to the bottom of the card insertion slot 21. Equipped with a card return port 22, and a card receiving passage 2 inside.
4. Card processing conveyance path 25, card return path 26
The card taking mechanism 29, the card transport mechanism 30, the card return mechanism 31, the card taking passage 24 and the card return passage 26 are connected to the card processing transport path 2.
5, a reverse insertion prevention lever 34 that prevents the card 8 from being reversely inserted from the card return slot 22, a magnetic head 10, and a touch roller 3 that presses the card 8 against the magnetic head 10.
6. Main components and mechanisms such as a drive motor 37 are provided.

The card intake passage 24 and the card return passage 26
The front ends communicate with the card insertion slot 21 and the card return slot 22, respectively, and the rear ends are connected to each other and communicate with the front end of the card processing and conveyance path 25. The card taking-in mechanism 29 consists of a driving-side taking-in roller 29a and a driven-side taking-in roller 29b, which are arranged vertically opposite to each other with the card taking passage 24 in between, and the driving-side taking-in roller 29a is connected to the card transport mechanism. 30, and the driven side take-in roller 29b is configured to rise when taking in the card 8 and press the card 8 against the drive side take-in roller 29a.

The card return mechanism 31 is connected to the card return passage 2.
Drive-side return roller 41a arranged to sandwich 6
and a driven-side return roller 41b, and the card transport mechanism 30 is connected to the drive-side return roller 41a.
One end of a conveyor belt 44 is stretched, and the driven return roller 41b is pressed against the drive return roller 41a via the belt 44.

The card transport mechanism 30 includes transport rollers 46a, 46b and driven rollers 47a, 47 that face each other across the card processing transport path 25.
b, the drive-side take-in roller 29a, the drive-side return roller 41a, the conveyor belt 44, the driven belt 33, the drive motor 37, and the deceleration pulley 4;
9, is composed of a tension pulley 50, a drive belt 51, a motor shaft pulley 52, etc., and the conveyor belt 4 is
4 and a driven belt 33 clamp and hold the card 8 and move it back and forth, while the magnetic head 10 reads, writes, and confirms the call frequency recorded on the card 8. . The conveyor belt 44 and the driven belt 33 are in contact with each other and are provided with a predetermined tension in order to reciprocate the card 8 smoothly and properly.

1 and 2 show a tension mechanism that applies a predetermined tension to the driven belt 33.The structure and the like will be explained in detail below.The tension mechanism 60 is formed in a substantially U-shape, with the lower end It includes a first bracket 61 bent toward the front and a second bracket 62 formed in a substantially U-shape, and the driven roller 47a is rotatably disposed via a shaft 63 at the bent portion of the first bracket 61. established,
One end of the driven belt 33 is stretched around the roller 47a. The second bracket 62 has an upper end rotatably supported by a support member 66 protruding from the inner surface of one side plate 65 of the card processing device 20, and a lower end and a tension roller 36 of the first bracket 61. The horizontal portion 61a extending in the direction is rotatably connected via a caulking pin 67.
The first bracket 61 is connected to the first spring 6.
8 in the clockwise direction about the caulking pin 67, that is, the driven roller 47a is moved to the conveying roller 4.
6a is provided with a rotational habit in the direction of pressure contact. On the other hand, the second bracket 62 is provided with the ability to rotate in a counterclockwise direction, that is, in a direction that applies tension to the driven belt 33, using the support member 66 as a rotation fulcrum by a second spring 70. In addition,
In the figure, 73 and 74 are spring stoppers, and 75 is the shaft 6.
3 to the first bracket 61.

The important point here is that the space around the driven roller 47a is divided into four areas I', ', ',' by the first imaginary line 12 and the second imaginary line 13, and the rotation of the first bracket 61 is Fulcrum, i.e. crimping pin 6
7 is located within the region ', which differs from the conventional structure shown in FIG. 4 in this respect. This area' includes the conveying roller 46a and the driven roller 47.
This area is located closer to the magnetic head 10 than the center of point a and includes the side 33b of the driven belt 33 opposite to the card holding side, that is, the side 33a that contacts the conveyor belt 44. Note that the first imaginary line 12 is a line passing through the centers of the conveyance roller 46a and the driven roller 47a, and the second
The imaginary line 13 is a line that is perpendicular to the first imaginary line 12 and passes through the center of the driven roller 47a.

Thus, the tension mechanism 60 having such a configuration can prevent speed fluctuations of the card 8. That is, the rotational moment of the first bracket 61 due to the first spring 68 is T in the clockwise direction. When the card 8 reaches the roller 47a, a driving force F is generated between the card 8 and the belt 33. When this driving force F is decomposed into the direction of the rotational fulcrum 67 of the roller 47a and the direction perpendicular to this, T ₂ is obtained.
T ₁ , and a counterclockwise rotational moment T ₁ is generated about the fulcrum 67. As a result, the roller 47a has a rotational moment T ₁ which reduces the conventional rotational moment T.
will occur. Therefore, the first bracket 61 can be opened easily, reducing the load on the card 8 compared to the conventional structure shown in FIG. Therefore, there is little variation in the speed of the card 8, and reading of recorded information data by the magnetic head 10 is not adversely affected.

Incidentally, although the speed fluctuation can be similarly reduced in the area ', it is generally difficult to secure sufficient space in this area due to the relationship with other components, etc., and thus it is considered unsuitable.

[Effect of idea]

As explained above, according to the conveyor belt tension mechanism according to the present invention, the rotational fulcrum of the first bracket is located within the area where the first bracket receives a rotational moment in the opening direction when a card arrives. There is no increase in the load on the card, so there is less variation in card speed, and jitter characteristics can be improved.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of the tension mechanism according to the present invention, FIG. 2 is an exploded perspective view of the same mechanism,
FIG. 3 is a schematic configuration diagram of a card processing device, and FIG. 4 is a side view of a conventional tension mechanism. 8...Card, 10...Magnetic head, 30...
Card transport mechanism, 33... Driven belt, 44...
Conveyance belt, 46a, 46b, 46c... Conveyance roller, 47a, 47b... Driven roller, 60...
Tension mechanism, 61...first bracket, 62
...Second bracket, 68...First spring,
70...Second spring, I',',','...
…region.

Claims (1)

[Scope of utility model registration request] A plurality of rollers, a pair of belts stretched across these rollers, facing each other, and holding and transporting the card between them; A first bracket rotatably supports one roller of a pair of rollers fed by a pair of belts, and one belt tensioned on the one roller is attached to the first bracket. a first spring that imparts a rotational behavior in a direction in which it is pressed against the belt; a second bracket that rotatably supports the first bracket; and a direction that applies tension to the one belt on the second bracket. and a second spring that imparts a rotational habit of
The rotation fulcrum of the first bracket is partitioned by a first imaginary line connecting the centers of the pair of rollers and a second imaginary line passing through the center of one of the rollers and substantially perpendicular to the first imaginary line. The conveyor belt is located in an area that is closer to the magnetic head than the first imaginary line and includes the side opposite to the card holding side of the one belt. Tension mechanism.