JPH0979342A - Clutch mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent malfunction of a card forced discharge mechanism by a method wherein a clutch gear engaged with an input gear is displaceable and movable in a direction in which the clutch gear is engaged with and disengaged from an output gear and during non-engagement of the clutch gear with the output gear, a contact member for making contact with the clutch gear is provided. SOLUTION: A clutch gear 302 is energized in a direction in which the clutch gear is engaged with an output gear 202. An electromagnetic solenoid 305 of a type wherein when the solenoid is energized, a moving clutch 305a is pulled in is employed, and a movement plate 306 is slid in a direction in which the clutch gear 302 and the output gear 202 are engaged with each other. Namely, the clutch gear 302 is provided with a movement habit in a direction in which the clutch gear is disengaged with the output gear 202. A contact member 304 is securely adhered to the bent part 308a of a bracket 308 positioning in a direction in which the output gear 202 and the clutch gear 302 are disengaged from each other and brought into a state to make contact with the end face 302a of the clutch gear 302.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch mechanism for intermittently transmitting the rotation of a driven gear to a non-driven gear.

[0002]

2. Description of the Related Art When a plurality of devices are intermittently driven by one drive source, it is a general method to provide a clutch mechanism between the devices. For example, in the card forced ejection mechanism used in the medium recording / reproducing apparatus for recording / reproducing magnetic information proposed by the applicant of the present application, between the output gear from the medium recording apparatus side and the input gear to the card forced ejection mechanism. , Clutch gears are arranged. The clutch gear is rotatably provided on a support shaft that is slidable in the engagement / disengagement direction by an actuator, and normally meshes with the output gear and is not meshed with the input gear. The driving force is turned down. Then, when the card forced ejection mechanism is used and the actuator operates and the support shaft slides, the clutch gear meshes with the input gear and the rotation from the output gear is transmitted to the input gear to operate the card forced ejection mechanism. I am letting you.

[0003]

However, in such a clutch mechanism, since the input gear is normally placed in a free state, the card forced ejection mechanism will not operate if a rotational force is applied to the input gear in any way. There is a risk of malfunction even at times.

[0004]

Therefore, in the invention described in claim 1, an output gear rotatably driven by a drive motor, an input gear rotatably supported by a base, and a slidable support by the base. A clutch gear provided on the supported support shaft and placed in mesh with the input gear, drive means for displacing the clutch gear in a direction to engage and disengage the clutch gear with the output gear, the clutch gear and the output. And a contact member that comes into contact with the clutch gear when not meshing with the gear.

According to the second aspect of the invention, the contact member is made of an elastic member such as rubber or resin. In the invention according to claim 3, the contact member is formed of a member having a large surface friction coefficient.
According to a fourth aspect of the present invention, an actuator that causes the drive means to slide a moving plate provided on a support shaft to which the input gear is fixed, in the engagement / disengagement direction between the output gear and the clutch gear, and the output gear to the clutch gear. And an urging member that gives a habit of moving in the direction of separation from and.

According to a fifth aspect of the present invention, the drive shaft supporting the output gear is provided with a roller member for conveying the recording medium inserted in the medium conveying path, and the roller member is integrally rotatable with the input gear. The pivot shaft is provided with a forced discharge member which is introduced into the medium transport path by meshing between the clutch gear and the output gear.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The medium recording / reproducing apparatus indicated by reference numeral 1 in FIG. The magnetic heads 4 and 5 arranged facing each other send and receive a recording / reproducing signal as magnetic information. The medium recording / reproducing apparatus 1 inserts the processed card C into the insertion slot 2a.
A reciprocating traveling system is adopted to discharge from. The medium recording / reproducing apparatus 1 is provided with a card forced ejection mechanism 10 for taking out the magnetic card C jammed in the medium conveying path 2 and a clutch mechanism 3 for intermittently connecting the medium recording / reproducing apparatus 1.

As shown in FIG. 2, the medium carrying path 2 is formed between the frames 1A and 1B arranged in parallel so as to face each other. Pre-heads 9A and 9B are arranged at the insertion port 2a of the medium transport path 2 so as to face each other with the medium transport path 2 in between. The pre-heads 9A and 9B are magnetic cards C to be inserted.
Whether or not the card is the magnetic card C is detected by the presence or absence of the magnetic signal of
Is one of the triggers for the opening and closing of a well-known shutter mechanism (not shown) that can be freely moved in and out of the medium transport path 2.

As shown in FIGS. 1 and 2, the pair of conveying rollers 6, 7, 8 are main drive rollers 6A, 7A, 8A as roller members arranged below the medium conveying path 2 and the medium conveying path. Sub-driving rollers 6B, 7B, 8B arranged above 2
It is composed of and. Main drive rollers 6A, 7
The A and 8A and the sub-driving rollers 6B, 7B and 8B are rubber rollers having a rubber layer on their outer circumferences, and are of a double-sided driving type which are individually driven by driving force transmitting means described later.

The main drive rollers 6A, 7A, 8A are composed of a pair of bearings 18a, 18b on the frame 1A and the frame 1C.
The drive shafts 12, 13 and 14 supported via 18c are respectively fixed. The drive shafts 12, 13, 14 have
Belt pulleys 191, 192, and 193 that constitute the driving force transmission means 19 on the main drive side are provided. The belt pulleys 191 and 193 are rotatably supported by the drive shafts 12 and 14 via bearings, respectively.
Is fixed to the drive shaft 13. Belt pulley 191,
A toothed drive belt 190 is hung on 192 and 193. The toothed drive belt 190 includes a belt pulley 19
Tension pulley 21 rotatably arranged on both sides of 2
Tension is provided by the a and 21b and the tension pulley 22, and a measure for preventing loss of transmission of the driving force to the main drive rollers 6A, 7A, 8A by the driving force transmission means 19 is taken.

A gear 201 and an output gear 202 which constitute the driving force transmission means 20 on the auxiliary drive side are fixed to the drive shafts 12 and 14. The sleeves 201a and 202a of the gear 201 and the output gear 202 have pins 2 extending in the radial direction.
01b and 202b are provided so as to penetrate the drive shafts 12 and 14, respectively. The pin 202b is the belt pulley 19
3 is disposed within the rotation range of the protrusion 193 a extending in the axial direction provided on the protrusion 3 and the protrusion 1 is rotated by the rotation of the pulley 193.
It is engageable with 93a. The output gear 202 constitutes an output unit in the medium recording / reproducing apparatus 1.

At the outermost end of the drive shaft 12, the drive shaft 1 is manually operated.
A knob 36 for rotating 2 is fixed. Gear 20
A gear 203 is rotatably supported via a bearing between 1 and the frame 1A. The gear 203 is integrally transferable with the belt pulley 191, and has a protrusion 203a that is engageable with the pin 201b of the gear 201. The pin 201b is arranged within the rotation range of the protrusion 203b. That is, the gear 203 rotates to rotate the protrusion 20.
When 3b is engaged with the pin 201b, the gear 201 is integrally rotated to drive the main drive roller 6A. Further, the output gear 202 is adapted to rotate when the belt pulley 193 rotates and the protrusion 193a and the pin 202b are engaged with each other, thereby rotating the main drive roller 8A.

A large-diameter pulley 194 is fixed to the drive shaft 13, and an endless timing belt 196a is attached to the large-diameter pulley 194.
It is wound around a small-diameter pulley 195 fixed to the.

As shown in FIG. 3, the auxiliary drive rollers 6B and 8B have a pair of bearings 18 on the frame 1A and the frame 1C.
The drive shaft 1 is fixed to drive shafts 15 and 17 supported via d and 18e, and the auxiliary drive roller 7B is supported by a pad arm 30 that is swingable around a shaft 31.
6 fixed.

An arm guide shaft 33 having a threaded portion at its tip is provided on the pad arm 30 slidably upward. The arm guide shaft 33 is the pad arm 3
The pad arm 1 is screwed to the pad frame 1D arranged above 0, and the pad arm 30 is movably supported. A lock nut 35 for preventing loosening is screwed into the screw portion from the upper side of the pad frame 1D. Pad frame 1
A compression coil spring 32 is provided between D and the pad arm 30.
Are provided to urge the drive shaft 16 downward to generate a pressing force against the magnetic card C.

Gears 204 and 205 meshing with the gear 201 and the output gear 202 are fixed to the drive shafts 15 and 17, respectively. The drive shaft 15 has a gear pulley 2 having a gear 206 which constitutes a part of both the drive force transmission means 20 and the drive force buffer means 23 between the gear 204 and the frame 1A.
31 is rotatably supported via bearings. Gear 2
06 is adapted to mesh with the gear 203 on the main drive side. A pulley 233 is fixed to the drive shaft 16. The pulley 233 and the toothed pulley 231 are formed with two circumferential grooves 231a and 233a, respectively.
Two round belts 232 are stretched around each groove.

The drive motor 11 rotates so as to rotate the conveying roller pairs 6, 7, and 8 in the card conveying direction indicated by the arrow a when the card is taken in, and the recording / reproducing operation of the magnetic card C by the magnetic heads 4 and 5 is performed. When it is finished, it is placed under the control of a control means (not shown) so as to rotate in the opposite direction to that at the time of taking in. Further, the drive motor 11 is stopped when the magnetic card C is placed in the medium conveyance path 2 for a predetermined time or longer, and is restarted when an electromagnetic solenoid described later is driven. For the detection of this predetermined time, a plurality of optical card sensors S provided along the medium transport path 2 are used, and the magnetic space between the card sensors S is set at a predetermined time set by a control means (not shown). When the card C does not pass, a card jam signal is issued and the clutch mechanism 3 described later is driven.

The magnetic heads 4 and 5 are arranged on the axis of the conveying roller pair 7 so that their head surfaces face the inside of the medium conveying path 2, and the magnetic stripe of the magnetic card C and the medium conveying path 2 are connected. Are opposed to each other. Magnetic head 4
Is urged toward the magnetic head 5 by a pressing means (not shown) so that the conveyed magnetic card C is sandwiched between both heads with a constant pad pressure.

Next, the clutch mechanism 3 and the card forced ejection mechanism 10 will be described. The clutch mechanism 3 is shown in FIG.
As shown in FIG. 2, the output gear 2 supported by the drive shaft 14
02, input gear 301 provided on the pivot 102, input gear 3
01 and the output gear 202 for connecting the clutch gear 30
2, driving means 303 for moving the clutch gear 302 in a direction to engage and disengage the clutch gear 302, clutch gear 3
02 and the output gear 202 are out of mesh, the clutch gear 3
A contact member 304 that contacts 02. Drive means 30
Reference numeral 3 denotes a moving plate 306 engaged with the support shaft 307, and an electromagnetic solenoid 30 as an actuator for sliding the moving plate 306 in the engagement / disengagement direction of the gear 202 and the clutch gear 302.
5 and a coil spring 309 as a biasing member.

As shown in FIG. 4, the output gear 202 is fixed to the drive shaft 14 outside the side plate 11 and is formed to be slightly wider in the axial direction than the clutch gear 302.
The support shaft 307 is slidably supported by a sleeve 1F formed on the base frame 1A. Stopper rings 307b and 307 are provided on the tip end 307a side of the shaft.
c are provided at intervals.

The clutch gear 302 is rotatably and slidably provided on the support shaft 307 between the stopper rings 307b and 307c. A torsion coil spring 37 is wound between the outer end surface 302a of the clutch gear 302 and the stopper ring 307b. One end 37a of this torsion coil spring is locked to the outer end surface 302a and the other end 37b is locked to the stopper ring 307b, respectively, and urges the clutch gear 302 in a direction to mesh with the output gear 202.

The movable plate 306 is formed so as to extend in the axial direction of the support shaft 307, and its base end 306a is connected to the movable rod 305a of the electromagnetic solenoid 305 via the pin 38. The tip 306b of the moving plate 306 has a pin 39
Is connected to the support shaft 307 via. The electromagnetic solenoid 305 is attached to a bracket 308 fixed to the frames 1A and 1B. The bracket 308 includes
Long holes 40A and 40B are formed in the longitudinal direction. Pins 38, 39 are provided in the long holes 40A, 40B.
Is loosely fitted and is guided when the moving plate 306 is moved.

The electromagnetic solenoid 305 is driven when the magnetic card C is jammed in the medium transport path 2, and here, when the card sensor S detects a card jam, it is energized and driven. Electromagnetic solenoid 30
A coil spring 309 is wound around the movable rod 305a of No. 5 between the pin 38 and the main body. Movable rod 305
a is normally disengaged from the clutch gear 302 and the output gear 202 shown in FIG.
The coil spring 3 is located at the initial position where a is pressed against the contact member 304.
09. Electromagnetic solenoid 305
Is a PUL that pulls in the movable rod 305a when energized.
An L type is used, and the moving plate 306 slides in the direction in which the clutch gear 302 and the output gear 202 shown by the arrow b mesh. That is, the clutch gear 302 is given a habit of moving in the disengagement direction from the output gear 202.

As shown in FIG. 4, the input gear 301 is rotatably supported by the frames 1A and 1E via bearings 42 and 43 and fixed to the pivot 102. Input gear 30
1 is formed wider in the axial direction than the amount of movement (displacement) of the clutch gear 302, and is always in a state of meshing with the clutch gear 302 as shown in FIG.

As shown in FIGS. 1 and 2, the card forced ejection mechanism 10 has a chain 10 that is stretched around sprockets 103 and 104 provided on pivots 101 and 102, respectively.
As shown in FIG. 4, an engaging protrusion 106 as a forced ejection member is provided in FIG. The sprocket 103 is provided on the pivot 101 supported by the frame 1C and is arranged below the medium transport path 2 in parallel with the sprocket 104. The chain 105 is wound around the sprockets 103 and 104 so as to be parallel to the medium transport path 2, and the engaging projection 106 can enter the medium transport path 2.

As shown in FIG. 7, the engagement protrusion 106 is formed wider than the thickness of the magnetic card C in the up-down direction of the medium carrying path 2, and one link 105 a constituting the chain 105. It is fixed to. Engaging protrusion 10
6 is usually arranged at a portion deviated from the medium transport path 2. Here, the engagement protrusion 106 is connected to one link 105.
Although it is provided only for a, a plurality of links may be provided for each adjacent link.

The abutting member 304 is, as shown in FIGS. 4, 5 and 6, the bent portion 308a of the bracket 308 located in the disengagement direction between the output gear 202 and the clutch gear 302.
It is glued and fixed to. The contact member 304 is a plate-shaped member made of an elastic body such as rubber or resin, preferably a member having a large friction coefficient, and has a semicircular opening 304a larger than the stopper ring 307b. In addition, the surface of the contact member 304 may be roughened by sandblasting or the like, or may be formed in an uneven shape to increase the friction coefficient of the surface. The contact member 304 is placed in contact with the end surface 302a of the clutch gear 302. An opening 308b having substantially the same diameter as the semicircular opening 304a is formed in the bent portion 308a.

The operations of the medium recording / reproducing apparatus 1 and the clutch mechanism 3 having the above-mentioned configurations will be described. When the magnetic card C is inserted into the card insertion slot 2a and a magnetic signal is detected by the pre-head 9A or 9B, the drive motor 11 is activated, and here, the magnetic card C is conveyed in the card conveying direction A, as shown in FIG. The shutter member (not shown) is retracted from the inside of the medium transport path 2 while being rotationally driven in the clockwise direction. The drive belt 11 is rotated by the timing belt 19
6 is transmitted to the large-diameter pulley 194, the drive shaft 13 is rotated, and the main drive roller 7A is rotationally driven.

The rotation of the drive shaft 13 is transmitted to the belt pulleys 191 and 193 via the toothed belt 190. The belt pulley 191 rotates from the integral gear 203 to the gear 20.
6, the drive shaft 16 through the round belt 232 and the pulley 233
Is transmitted to the sub-driving roller 7B to rotate. Gear 2
When 03 rotates and the projection 203b engages with the pin 201b, the gear 201 rotates, the drive shaft 12 rotates, and the gear 2
01, the drive shaft 15 is also rotated via the gear 204, and the main drive gear 6A and the sub drive roller 6B are rotationally driven. The belt pulley 193 rotates, and the protrusion 193a becomes the pin 202b.
, The gear 202 is rotated to rotate the drive shaft 12, the drive shaft 17 is rotated via the gear 202 and the gear 205, and the main drive roller 8A and the sub drive roller 8B are rotationally driven to convey the paper. The roller pairs 6, 7, and 8 are in a driving state.

The inserted card C has a pair of conveying rollers 6,
The sheet is sandwiched in the order of 7 and 8 and conveyed in the medium conveying path 2, and a series of processes such as recording and reproducing of magnetic information is performed by one of the magnetic heads 4 and 5 depending on the card type. When this process is completed, the magnetic card C is conveyed toward the card insertion slot 2a by the inversion drive of the drive motor 11.

On the other hand, when the taken-in magnetic card C is positioned in the medium transport path 2 for a predetermined time or more, or when the moving speed in the medium transport path 2 becomes extremely slow, the magnetic card C is placed in the medium transport path 2. The card sensor S detects that the card is jammed and once stops the drive motor 11. Then, the electromagnetic solenoid 305 is driven to move the movable rod 305a from the position shown in FIG.
Is slid in the direction of arrow b, and the support shaft 307 slides in the sleeve 1F while pressing the coil spring 37 with the stopper ring 307b. Then, the clutch gear 302 meshed with the input gear 301 is displaced to a position where it meshes with the output gear 202, and elastically abuts against the gear 202 by the spring force of the coil spring 37, as shown in FIG.

When the electromagnetic solenoid 305 is driven, the drive motor 11 is redriven to rotate the output gear 202. Since the clutch gear 302 is biased by the coil spring 37 against the output gear 202,
When 2 rotates and one tooth that is abutting is displaced, it is pushed into the output gear 202 and meshes. At this time, output gear 2
02 and the tooth of the clutch gear 302 mesh with each other even if the output gear 202 does not rotate.
Then, the driving rotation of the output gear 202 causes the clutch gear 30 to rotate.
When it is transmitted to the input gear 301 via 2, the chain 105 rotates via the sprocket 104. Then
The engaging protrusion 106 enters the medium transport path 2 and contacts the jammed magnetic card C as shown in FIG. 7, scratches the card and transports it in the medium transport path 2.

On the other hand, when the magnetic card C is returned to the card insertion slot 2, the driving of the drive motor 11 is stopped, the energization of the electromagnetic solenoid 305 is cut off, and the coil spring 309 wound around the rotating rod 305a is cut off. The moving plate 306 is moved by the spring force, and the support shaft 307 is moved to the arrow d in FIG.
Slide in the detaching direction indicated by. Then, the tip 307a of the shaft
However, as shown in FIG. 5, the clutch gear 302 is disengaged from the output gear 202 in a state of meshing with the input gear 301 by penetrating through the semicircular opening 304a and the opening 308b, and at the same time, the end face 302a is in contact. The contact member 305 is pressed by the spring force of the spring 309.

As described above, by pressing the clutch gear 305 against the contact member 305 when the output gear 202 is free, the contact member 3 is attached to the clutch gear 305.
The frictional resistance with 05 gives a rotation restriction force to prevent inadvertent rotation. Therefore, even when the input gear 301 is always meshed with the input gear 301, the input gear 301 can be prevented from rotating and the card forced ejection mechanism 10 can be prevented from malfunctioning. Also,
The fact that the input gear 301 can be prevented from rotating is that the engagement protrusion 1
Since it is possible to prevent the movement of 06,
It is possible to easily control the initial position of 06.

The input gear 301 for driving the engaging projection 106 that abuts the jammed magnetic card C is replaced with the clutch gear 302.
Since the input gear 40 can be driven by the drive motor 11 by being connected to the output gear 202 via, the magnetic card C jammed by one motor can be forcibly ejected. Further, since the input gear 301 is connected to the output gear 202 via the clutch gear 302, the output gear 2
Since it is driven to rotate in the same direction as 02, the engaging protrusion 106
In addition to the moving force of the above, the conveyance driving force by the conveyance roller pairs 5, 6, and 7 acts on the magnetic card C that is jammed in an auxiliary manner, so that the jammed card can be reliably conveyed.

Since the coil spring 37 is wound around the support shaft 307 to urge the clutch gear 302 against the output gear 202, the output gear 302 can be surely meshed with each other by a slight rotation. It is possible to prevent tooth chipping due to careless rotation. In the present embodiment, the output gear 202
Although the clutch gear 302 is engaged and disengaged from the clutch gear 302, the clutch gear 302 may be engaged and disengaged from the gear 205. Further, although the electromagnetic solenoid 305 is used as the actuator in the driving unit 303, an electromagnetic clutch, a rotary solenoid, or the like may be used.

[0037]

According to the present invention, a clutch gear, which is placed in mesh with an input gear rotatably provided on the base,
When the output gear that is rotationally driven by the drive motor is not in mesh with each other, the clutch gear is in contact with the contact member and the rotation restricting force is applied to the input gear. Therefore, the rotation of the input gear can be prevented even if some rotational force is applied to the input gear when the input gear is in a free state separated from the drive gear. In addition, when the card forced ejection mechanism is interlocked with the input gear, it is possible to prevent the card forced ejection mechanism from malfunctioning.

Further, since the clutch gear is provided with the habit of moving in the disengagement direction from the output gear by the urging member provided in the driving means, the clutch gear is strongly pressed by the contact member. In addition, since the contact member is composed of an elastic member or a member having a large surface friction coefficient, the rotation regulating force (friction force) on the input gear is increased, and the malfunction of the card forced ejection mechanism can be prevented more reliably. You can

In the present invention, the drive shaft supporting the output gear is provided with the roller member, and the pivot shaft provided so as to rotate integrally with the input gear is forcibly introduced into the medium conveying path by the engagement of the clutch gear and the output gear. Since the discharge member is provided, when the clutch gear and the output gear are brought into the meshed state, the forced discharge member is introduced into the medium conveyance path to engage the jammed recording medium and discharge the recording medium. Also, when the input gear is free from the drive gear, the rotation of the input gear is restricted by the contact between the clutch gear and the contact member, so the positioning of the forced discharge member can be set easily. Is possible.

[Brief description of drawings]

FIG. 1 is a side view of a schematic configuration of a medium recording / reproducing apparatus equipped with a clutch mechanism according to an embodiment of the present invention.

FIG. 2 is a plan view showing the configurations of a main drive transmission system and a clutch mechanism for medium recording and conveyance.

FIG. 3 is a plan view showing a configuration of an auxiliary drive transmission system for medium recording and transport.

FIG. 4 is an enlarged view showing the configuration and operation of the clutch mechanism.

FIG. 5 is an enlarged view showing an initial position of a clutch mechanism.

FIG. 6 is a perspective view showing a mounting state of a contact member.

FIG. 7 is a side view showing a forced ejection state of a card.

[Explanation of symbols]

 1A Base 2 Medium transport path 3 Clutch mechanism 8A Roller member 11 Drive motor 14 Drive shaft 102 Axis 105 Forced discharge member 202 Output gear 301 Input gear 302 Clutch gear 303 Drive means 304 Contact member 305 Actuator 306 Moving plate 307 Support shaft 309 Biasing member b Engaging direction d Disengaging direction C Recording medium

Claims (5)

[Claims] 1. An output gear rotatably driven by a drive motor, an input gear rotatably supported by a base, and a clutch gear slidably supported by the base and in mesh with the input gear. And a driving means for displacing the clutch gear with respect to the output gear in a disengaging direction, and a contact member that comes into contact with the clutch gear when the clutch gear and the output gear are out of mesh. mechanism. 2. The clutch mechanism according to claim 1, wherein the contact member is made of an elastic member such as rubber or resin. 3. The clutch mechanism according to claim 1, wherein the contact member is a member having a large surface friction coefficient. 4. The drive means includes a moving plate provided on a support shaft to which the input gear is fixed, an actuator for sliding the moving plate in a disengagement direction between the output gear and the clutch gear, and the clutch. 4. The clutch mechanism according to claim 1, further comprising an urging member that gives the gear a habit of moving in a disengagement direction from the output gear. 5. A drive shaft that supports the output gear is provided with a roller member that conveys a recording medium that is inserted into a medium conveyance path, and a pivot shaft that is integrally rotatable with the input gear has the clutch gear. 5. The clutch mechanism according to claim 1, further comprising a forcible discharge member that is introduced into the medium transport path by meshing between the output gear and the output gear.