JPH0743075Y2 - Media pulling mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a medium pulling mechanism for pulling a medium such as a magnetic card, a slip, or a passbook to a reference surface.

[Conventional technology]

Magnetic writing with a magnetic writing head, printing with a print head, or reading of information recorded on these media with a magnetic reading head on media such as magnetic cards, slips, and passbooks used in financial institutions. In this case, first, it is necessary to draw the medium to the reference surface by the medium drawing mechanism.

FIG. 6 is a side view showing a conventional example of a medium pulling mechanism of this type, which is the technique disclosed in Japanese Utility Model Laid-Open No. 61-80746.

In the figure, 1 is a plunger magnet, 2 is a link connected to the plunger magnet 1 through a shaft 3, and 4
Is a lever rotatably supported by a fixed shaft 5, one end of which is connected to the link 2 by a shaft 6.

Reference numeral 7 denotes a slide bracket having elongated holes 7a and 7b, which can be linearly moved by fitting the elongated holes 7a and 7b into fixed shafts 8a and 8b, respectively.

Reference numerals 9a and 9b denote clamp levers, one end of which is rotatably connected to the middle of the slide bracket 7 by shafts 10a and 10b, respectively.

The rollers 11a and 11b are opposed to each other in the middle of the clamp levers 9a and 9b and are provided so as to slightly project inward.
Are attracted to each other.

A limiter post 13 is provided at the rear end of the slide bracket 7.
The limiter post 13 is in contact with the end portion of the lever 4, and a spring 14 is provided between the lever 4 and the slide bracket 7 to draw each other.

At the other ends of the clamp levers 9a, 9b, pressing members 15a, 15b made of a rectangular parallelepiped rubber material are fixedly provided so as to face each other, and the medium 16 can be sandwiched.

Reference numeral 17 is a plate cam, and the rollers 11a, 11b attached to the clamp levers 9a, 9b are in contact with the cam surfaces 17a, 17b.

The cam surfaces 17a and 17b of the plate cam 17 are composed of a first surface in which the pushers 15a and 15b are in pressure contact with each other when the rollers 11a and 11b are in contact, and a second surface in which the pushers 15a and 15b are separated from each other. It

Reference numeral 18 is a frame, and a reference surface 19 is formed at an end thereof, and an operation hole 20 is formed at a position where the pressing elements 15a and 15b are located nearby.

Reference numeral 21 denotes a reset spring, which is stretched between the main body and the lever 4 to pull the lever 4.

Reference numeral 22 is a feed roller that is rotated by a motor (not shown) to convey the medium 16, and 23 is a pressure roller that is pressed against and separated from the feed roller 22 by a solenoid (not shown).

FIG. 7 is a side view showing the operation of the conventional example, and FIG. 8 is a side view showing the movement paths of the pressers 15a and 15b in the conventional example.

With the above configuration, the medium 16 is sandwiched between the feed roller 22 and the pusher roller 23, and when the medium 16 is conveyed to a predetermined pulling position, the pusher roller 23 is separated from the feed roller 22.

Next, when the plunger magnet 1 is excited, the link 2
The lever 4 rotates about the fixed shaft 5 via the spring, and the spring 14 moves the slide bracket in the direction of arrow A in FIG. 7 using the fixed shafts 8a and 8b as guides.

When the movement is started, the first of the cam surfaces 17a and 17b of the plate cam 17 is moved.
Of the clamp levers 9a, 9b by the action of the roller and the rollers 11a, 11b.
As shown in the movement path of the pusher in FIG. 8, the pushers 15a and 15b move as P0 → P1 and sandwich the medium 16 on the frame 18, and then move as P1 → P2. 16 reference plane
Attract to 19.

When the medium 16 is pulled, the medium 16 is again fed by the feed roller 22.
It is nipped by the pusher roller 23.

When the excitation of the plunger magnet 1 is cut off in the above state, the reset spring 21 operates the lever 4 to move the slide bracket 7 in the direction of arrow B in FIG. By the action of the cam surfaces 17a, 17b of the plate cam 17 and the rollers 11a, 11b caused by the movement of the slide bracket 7, the pushers 15a, 15
b is P2 → P1 which is the reverse of the motion path that was taken when the medium 16 was drawn.
→ Moves to P0, returns to the initial position, and opens.

In this way, the mechanism is simplified by making the movement paths of the pushers 15a and 15b the same for both reciprocations.

By the above operation, the medium 16 is attracted to the reference surface 19, and various processing is performed.

[Problems to be solved by the device]

However, according to the conventional technique with the above-described configuration, since the medium is sandwiched by the feed roller and the pressure roller, and the pressing element remains in contact with the medium at the time of returning, friction occurs in the above-described movement path, and As shown in the figure, there are problems that the drawn medium is separated from the reference surface again, wrinkled, and damaged.

Further, when the medium is pulled by the medium pulling mechanism with the medium approaching the reference surface, the friction force between the pressing element and the medium overcomes the contact force of the medium with respect to the reference surface,
As shown in FIG. 10, there is a problem that the medium is wrinkled between the pressing element and the reference surface.

The occurrence of wrinkles and breakage of the medium as described above occurs when the thickness of the medium is thin and the strain is weak, for example, the 45th edition continuous weight of 45 kg or 55
It is remarkable when kg paper is applied as a medium.

The reason is that when the medium is pulled toward the reference surface, the force of the pressing element that holds the medium is weakened. Therefore, in the case of a thick and strong medium, the presser slides on the medium surface by contacting the reference surface.

It is an object of the present invention to realize a medium pulling mechanism with high operation reliability that pulls wrinkles and damages to the medium without pulling the medium, and reliably and safely pulls a thin medium.

[Means for Solving the Problems]

In order to achieve the above object, the present invention is
Release the pusher once before returning.

That is, the present invention has a pair of opposing clamp levers having a pusher at the tip and a moving mechanism for moving the clamp levers in the medium pulling direction and the returning direction, and the rollers are attached to the clamp levers. A cam with which the roller abuts is provided, and the cam has a first surface with which the pair of pushers presses against each other when the roller abuts, and a second surface with which the pair of pushers separate from each other. In a medium pulling mechanism that performs a medium pulling operation and a clamp lever returning operation by moving the clamp lever, a cam moving mechanism that moves the cam in the medium pulling direction and a drive source that drives the cam moving mechanism are provided. After the medium pulling operation, the cam is moved before the return operation of the clamp lever to separate the pusher member. It is recommended to forcibly guide the wrinkle between the reference plane and the reference plane.

That is, in addition to the above configuration, a medium guide that is parallel to the medium transport surface when the medium is pulled is formed on the medium facing surface of the clamp lever.

[Action]

In the present invention having the above configuration, when the moving mechanism is driven to move the position of the rear end of the clamp lever in the medium pulling direction, the roller contacts the first surface of the cam and the opening of the front end of the clamp lever is controlled. Then, the presser installed at the tip of the clamp lever moves in the reference plane direction across the medium, and the medium is drawn to the reference plane.

At this time, if a medium guide is formed on the medium pulling side of the pusher at a right angle to the pulling direction, wrinkles are likely to occur between the pusher and the reference surface, and if a part of the medium rises, the medium guide Forces this to prevent wrinkles.

After the pulling of the medium is completed and before the return operation of the clamp lever, the cam moving mechanism is driven by the drive source for the mechanism, and when the cam is moved, the roller rides on the second surface of the cam, whereby the presser moves the medium. Almost vertically away from. When the clamp lever is moved in the return direction in this state, the pusher returns to the initial position while being separated from the medium.

〔Example〕

 Embodiments will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the present invention.

In FIG. 1, 31 is a motor capable of rotating in the forward and reverse directions, and 32 is a pinion fixed to the rotating shaft of the motor 31. Reference numeral 33 is a rack bracket having a rack 34 which meshes with the pinion 32 at one end. The rack bracket 33 has an elongated hole 35 parallel to the medium pulling direction, and is fixed by the fixed shafts 36a and 36b in the medium pulling direction (arrow A direction). It can be moved back and forth.

Reference numerals 37 and 38 denote optical sensors, and the optical sensors 37 and 38 detect the position of the rack bracket 33 by means of the arm portion 33a projectingly formed on the rack bracket 33.

39 is a slide bracket, and the slide bracket
39 has a long hole 40 parallel to the medium pulling direction, and a fixed shaft 41
By a and 41b, it is possible to reciprocate in the medium drawing direction (arrow A direction).

Reference numeral 42 denotes a spring stud 43 projectingly formed on the slide bracket 39. The spring stud 43 is a spring stretched between the spring stud 42 and the rack bracket 33. The spring 43 is a limiter 44 and a distance between the spring stud 42 and the rack bracket 43. Tension is given by keeping the constant.

45a and 45b are clamp levers, the rear ends of which are rotatably connected to the middle of the slide bracket 39 by shafts 46a and 46b, respectively.

Numerals 47a and 47b are rollers which are arranged opposite to each other in a state of protruding inward in the middle of the clamp levers 45a and 45b.

Reference numeral 48 denotes a clamp spring stretched between the clamp levers 45a and 45b, and the clamp springs 48 draw the clamp levers 45a and 45b together.

49a and 49b are pushers provided at the tips of the clamp levers 45a and 45b so as to face each other.

Reference numerals 50a and 50b denote medium guides provided on the medium facing surfaces of the clamp levers 45a and 45b, and the medium guides 50a and 50b are at substantially the same height as the pressers 49a and 49b when the medium is drawn and are horizontal to the medium transport surface. The clamp levers 45a, 45b are formed by projecting a part of the clamp levers 45a, 45b.

With the above configuration, when the motor 31 is rotated in the normal rotation (direction of arrow C in FIG. 1), the rack bracket 33 moves in the direction of arrow A and is pulled by the spring 43 so that the slide bracket 39 also moves in the direction of arrow A. , This allows the shaft 46a,
The clamp levers 45a and 45b move in the direction of arrow A, that is, in the medium pulling direction via 46b.

On the contrary, when the motor 31 is rotated in the reverse direction (arrow D direction in FIG. 1), the rack bracket 33 moves in the arrow B direction, and the limiter 44 is pushed, so that the slide bracket 39 also moves in the arrow B direction. The clamp levers 45a and 45b move in the arrow B direction, that is, the return direction, via the shafts 46a and 46b.

Reference numeral 51 is a plate cam, and rollers 47a, 47b attached to the clamp levers 45a, 45b are in contact with the cam surfaces 51a, 51b.

The cam surfaces 51a, 51b of the plate cam 51 are composed of a first surface in which the pressure elements 49a, 49b are in pressure contact with each other when the rollers 47a, 47b are in contact, and a second surface in which the pressure elements 49a, 49b are separated from each other. It

Further, the plate cam 51 has an elongated hole 52 parallel to the medium pulling direction, and can be reciprocated in the arrow A direction by the fixed shafts 53a and 53b.

54 is a solenoid, 55 is a link connected to the solenoid 54 by a shaft 56, 57 is a lever that rotates about a fixed shaft 58 as a fulcrum, and one end of the lever 57 is rotatably connected to the link 55 via a shaft 59. The other end is rotatably connected to the plate cam 51 via a shaft 60 fixed to the plate cam 51.

61 is a spring stud, and 62 is a reset spring, which is stretched between the main body and the lever 57 to pull the lever 57 in the returning direction.

With the above configuration, when the solenoid 54 is excited, it is linked.
55 is sucked in the direction of arrow E and the shaft 59 moves in the direction of arrow E, whereby the lever 57 moves around the fixed shaft 58 in the direction of arrow F.
And the plate cam 51 moves in the direction of arrow A via the shaft 60.

On the contrary, when the excitation of the solenoid 54 is stopped, the reset spring 62 causes the lever 57 to rotate about the fixed shaft 58 in the direction of arrow G, and the plate cam 51 to move through the shaft 58 in the direction of arrow B, that is, the return direction. .

Reference numeral 63 is a frame, and a reference surface 64 is formed at an end thereof, and an operation hole 65 is formed at a position where the pressing elements 49a, 49b are located nearby.

Reference numeral 66 is a feed roller that rotates by a motor (not shown) to convey the medium 16, and 67 is a pressure roller that presses and separates from the feed roller 66 by a solenoid (not shown).

FIG. 2 is a block diagram showing the control system of this embodiment.

In the figure, 68 is a main control unit, 69 is a feed roller control unit that controls the drive of the feed roller 66, 70 is a pressure roller control unit that controls the contact / separation of the pressure roller 67, and 71 is the drive source of the medium pulling mechanism. A motor control unit that controls the drive of the motor 31 that serves as a control unit, 72 is a solenoid control unit that controls the drive of the solenoid 54 that operates the plate cam 51, and 73 is sensors 37, 38 and sensors (not shown) arranged in various places in the apparatus. Is a sensor driving unit that controls the drive of the sensor and sends the detection signals of these sensors to the main control unit 68.

The operation of this embodiment having the above configuration will be described below.

3 (a) to 3 (d) are side views showing the operation of this embodiment,
FIG. 4 is an operation flowchart of the same embodiment, and FIG. 5 is a side view showing movement paths of the pushers 49a and 49b in the same embodiment.

With the above configuration, the medium 16 is nipped by the feed roller 66 and the pressure roller 67, conveyed to a predetermined pulling position, and when a sensor (not shown) arranged on the conveyance path detects this, the pressure roller 67 is fed from the feed roller 66. Separate.

This state is the initial state of pulling the medium shown in FIG. 3A, the rollers 47a and 47b of the clamp levers 45a and 45b contact the cam surfaces 51a and 51b of the plate cam 51, and the pressers 49a and 49b move to the first position. It is at the initial position P0 shown in FIG. At this time, the sensor 37 is on, the sensor 38 is off, and the solenoid 54 is not excited.

Next, when the motor 31 is rotated in the direction of arrow C (S1), the third
As shown in FIG. 6B, the rollers 47a, 47b of the clamp levers 45a, 45b are moved closer to each other along the cam surfaces 51a, 51b of the plate cam 51, and the action of the spring 48 causes the clamp levers 45a, 45b.
When the rollers 45a, 47b reach the first surface of the cam surfaces 51a, 51b, the pressing elements 49a, 49b move to P1 and hold the medium 16 therebetween. Continue to presser 49a, 49b
Moves from P1 to P2 and draws the medium 16 to the reference surface 64. At this time, the medium guides 50a and 50b are pressed against the pressers 49a and 49b and the reference surface 64.
The ridge of the medium 16 generated between them is forcibly pressed down to prevent the generation of wrinkles.

Then, when the sensor 38 is turned on (S2), the motor 31
Is stopped (S3), the pressure roller 67 is brought into pressure contact with the feed roller 66, and the drawn medium 16 is again pinched (S4).

Next, the solenoid 54 is excited to move the plate cam 51 in the medium pulling direction (S5). As a result, the rollers 47a, 47 of the clamp lever ride on the second surfaces of the cam surfaces 51a, 51b and move in the direction perpendicular to the medium pulling direction (arrows H, H'directions shown in FIG. 3 (c)). The pressers 49a and 49b are separated from the medium 16 in the vertical direction (arrows H and H'directions) and move from P2 to P3.

Finally, when the motor 31 is rotated in the reverse direction (direction of arrow D) (S6), the clamp levers 45a and 45b move in the direction of arrow B, where the sensor 38 is turned off and the sensor 37 is turned on (S7). The rotation of the motor 31 is stopped (S8), and the state shown in FIG.

At this time, excitation of the solenoid 54 also stops (S9), so the plate cam
51 moves in the direction of arrow B and returns to the initial state of FIG. 3 (a), and the pushers 49a and 49b have returned to the initial position P0.

With this, the pulling operation is completed.

[Effect of device]

As described in detail above, according to the present invention, a pair of clamp levers, which are provided to face each other and have a pressing element at the tip, and a moving mechanism for moving the clamp levers in the medium pulling direction and the returning direction, A roller is attached to the clamp lever, and a cam with which the roller abuts is provided. In the cam, when the roller abuts, the first surface where the pair of pressing elements presses against each other and the pair of pressing elements separate from each other. In a medium pulling mechanism that has a second surface and performs a medium pulling operation and a returning action of the clamp lever by moving the clamp lever, a cam moving mechanism that moves the cam in the medium pulling direction, and the cam moving mechanism. A drive source for driving the media is provided, and the cam is moved after the medium pulling operation and before the return operation of the clamp lever to separate the presser, so that the medium pulling operation is performed. After asked, it is possible to return from once release the presser.

Further, by forming a medium guide on the medium facing surface of the clamp lever that is horizontal to the medium conveying surface when the medium is pulled, it is possible to forcibly guide the wrinkles between the pressing element and the reference surface.

As a result, it is possible to prevent the medium from being subjected to a load that causes wrinkles or damage, and there is an effect of realizing a medium pulling mechanism with high operation reliability that pulls a thin medium securely and safely.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a block diagram showing a control system of this embodiment, and FIGS. 3 (a) to 3 (d).
Is a side view showing the operation of the present embodiment, FIG. 4 is an operation flowchart of the same embodiment, FIG. 5 is a side view showing the movement path of the presser in the same embodiment, and FIG. 6 is a side view showing a conventional example. ,
FIG. 7 is a side view showing the operation of the conventional example, FIG. 8 is a side view showing the movement path of the pusher in the conventional example, FIG. 9 is a side view showing the problems of the conventional example, and FIG. It is a side view which shows the further problem of the same prior art example. 16 …… Medium 31 …… Motor 45a, 45b …… Clamp lever 47a, 47b …… Roller 49a, 49b …… Presser 50a, 50b …… Medium guide 51 …… Plate cam 54 …… Solenoid 57 …… Lever 64… …Reference plane

Claims (2)

[Scope of utility model registration request] 1. A pair of clamp levers, which are provided to face each other and have a pusher at the tip, and a moving mechanism for moving the clamp levers in a medium pulling direction and a returning direction, and a roller is attached to the clamp lever, A cam with which the roller abuts is provided, and the cam has a first surface with which the pair of pushers presses each other when the roller abuts, and a second surface with which the pair of pushers separates from each other. In a medium pulling mechanism that performs a medium pulling operation and a clamp lever returning operation by moving the clamp lever, a cam moving mechanism that moves the cam in the medium pulling direction and a drive source that drives the cam moving mechanism are provided. A medium pulling mechanism, characterized in that, after the medium pulling operation, the cam is moved before the return operation of the clamp lever to separate the presser. 2. The medium pulling mechanism according to claim 1, wherein the medium facing surface of the clamp lever is formed with a medium guide that is horizontal to the medium transporting surface when the medium is pulled.