JPH0318196Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an automatic paper feeding device for a printing machine.

In the conventional automatic paper feeding device mentioned above, a micro switch is provided on the paper tray, and the switch lever comes into contact with the paper for printing, and the push button of this micro switch is pressed to maintain the state in which automatic paper feeding operation is possible. In addition, when the paper runs out and the switch lever no longer comes into contact with the switch lever, the push button protrudes and stops the paper feeding operation.

By the way, when the above-mentioned paper tray is locked in the interrupt position for manual paper feeding, if there is not enough paper in the paper tray, the push button will be pushed and the switch lever will lift up the paper, and as a result, the push button will protrude and the paper will not be fed. There was a drawback that manual paper feeding was not possible because the paper operation was stopped.

The present invention was proposed to solve the above-mentioned conventional drawbacks, and the microswitch is equipped with a sensing lever that maintains the paper feed operation possible regardless of the amount of paper when the paper tray is locked in the cut-in position. This is to ensure manual paper feeding.

The illustrated embodiment will be described below.

Reference numeral 1 denotes a mount detachably attached to the printing machine main body 2, and a paper guide plate 5 having a chevron-shaped cross section is horizontally suspended between left and right side plates 3 and 7, which are approximately L-shaped in plan.

U-shaped locking recesses 6, 7 are formed in the upper front portions of the left and right side plates 3, 4, and semicircular locking portions 8, 9 are formed in the lower front portions, and in the vicinity thereof. Hooks 10 and 11 are rotatably attached.

The mount 1 has left and right side plates 3 and 4 mounted on a support 12 provided on the printing machine body 2, and a locking recess 8,
9 are fitted into the upper circumferences of annular grooves 15, 16 formed around the left and right side portions of the shaft 14 of the platen 13, and the hooks 10, 11 are fitted into the annular grooves 15, 16.
16, and is detachably mounted.

The hooks 10, 11 are biased by springs 17 (the left one not shown) to maintain the engaged state.

Reference numeral 18 denotes a base frame having a substantially rectangular plane and detachably mounted on the mount 1, which includes left and right plates 19,
20, a paper feed roller shaft 21, a delivery roller shaft 22,
Partition plates 23 to 26, a support plate 27, and a rod 28 are suspended horizontally.

The left and right side plates 19 and 20 have a horizontal central part and a front downward slope.
Only the rear part is long and slopes upward.

The partition plates 23 to 26, the delivery roller shaft 22, and the rod 2 are attached to the front sides of these left and right plates 19, 20.
8, a paper feed roller shaft 21 is provided at the center thereof, and a support plate 27 is provided at the rear end thereof.

Both ends of the rod 28 are the left and right side plates 19, 2.
0, and forms an annular groove 29 around it.

Further, a relay gear 30 is rotatably supported by a shaft 31 below the rod 28 on the outer surface of the right side plate 20.

Then, the rear ends of the left and right side plates 19 and 20 of the base frame 18 are mounted on the rear ends of the left and right side plates 3 and 4 of the mount 1, and the grooves 29 at the left and right ends of the rod 28 are inserted into the left and right sides.
When the base frame 18 is mounted on the mount 1 by fitting into the locking recesses 6 and 7 of the right side plates 3 and 4, the relay gear 30 automatically meshes with the platen gear 32 mounted on the shaft 14. It's getting old.

The partition plates 23 to 26 are inclined forward and downward, and are spaced apart from each other by a required distance, forming a printed paper delivery path 33 between the lower side of the partition plate 23 and the partition plate 24, A feeding path 34 for manual paper feeding is formed between the partition plate 25 and the partition plate 26.

Further, the lower part of the partition plate 25 is bent into a substantially L-shape, and a storage part 35 for printed paper is provided above it, and the printed paper is stored in the storage part 35 in the upper part of the partition plates 23, 25. Arch-shaped support rod that supports paper 3
6,37 has been established.

The support plate 27 has a convex shape and is inclined downwardly toward the front, with a portion above approximately the center protruding above the right side plate 20.

The feed roller shaft 22 has a lower feed roller 38 fitted at three locations on the center and left and right sides, and a gear 39 fitted to the right end portion protruding outside of the right side plate 20, and this gear 39 is connected to the relay gear. It meshes with 30.

The paper feed roller shaft 21 is connected to the paper feed rollers 40, 41.
are fitted, and the right end portion protrudes to the outside of the right side plate 20.

The paper feed rollers 40, 41 are integrally formed with collars 43, 44 having an annular groove 42 around the periphery.
Internally known one-way clutch (not shown)
Therefore, the paper feed roller shaft 21 can be moved in the axial direction of the paper feed roller shaft 21, and when the paper feed roller shaft 21 rotates (clockwise in FIG. 3), they rotate together, and the paper feed roller shaft 21 is fixed. Sometimes it is supported on a shaft so that it can rotate freely (clockwise in the figure).

The paper feed roller 40 is connected to the paper feed roller shaft 21
The paper feed roller 41 is connected to a paper holder 46 of a paper tray 45, and is movable left and right together with the paper holder 46.

The paper tray 45 has a substantially convex plate shape,
The central upper end is supported by a shaft 47 on the central upper end of the support plate 27 so as to be swingable back and forth, and the lower end rear side and the support plate 2
It is urged to swing forward by a coil spring 48 mounted between it and 7.

This paper tray 45 has its left edge connected to the left side plate 19.
The right edge is spaced a little from the right side plate 20, and the lower edge is located just above the paper stopper 49 provided on the lower part of the support plate 27.

The paper stopper 49 is integrally formed by bending the lower portion of the support plate 27, and its front edge 50 is positioned immediately above the paper guide plate 5.

Further, openings 51, 52, and 53 are formed at three locations in the center and on the left and right sides of the paper tray 45, and a hook 54 is integrally formed on the left side edge of the central opening 51 and projects toward the rear side.

A sensing lever 56 of a micro switch 55 for sensing the presence or absence of paper is placed in front of the opening 52.
3 faces a paper holder 46.

The micro switch 55 has a mounting piece 57 integrally formed on the left side edge of the opening 52 and protruding rearward.
It is screwed to.

The sensing lever 56 has a spring property and is bent into a chevron shape on the side. A portion slightly below the center is pivotally supported on the micro switch 55 so as to be able to swing back and forth, and the back surface of the lower portion is attached to the protrusion of the micro switch 55. It is brought into contact with the biased push button 58.

The micro switch 55 is configured such that when the push button 58 protrudes and turns OFF, automatic paper feeding and printing operations are stopped, and when no paper 59 for printing is set in the paper tray 45, the push button 58 protrudes. sensing lever 56
is swung forward, and the lower end of the sensing lever 56 is made to protrude forward from the opening 52.

When a paper 59 is set on the paper tray 45, the sensing lever 56 whose lower end is pushed by the paper 59 swings rearward, and its lower end is displaced into the opening 52, while the sensing lever 56 The push button 58 is pushed in by the lever 56, the micro switch 55 is turned on, and the above-mentioned automatic paper feeding and printing operations are released from being stopped.

In addition, the paper tray 45 can be moved to the cut-in position (Fig. 4) for manual paper feeding or for setting paper.
When the sensor lever 56 is locked, the upper end of the sensing lever 56 contacts the support plate 27 and is slightly bent by the spring force, which causes the sensing lever 56 to push the push button 58 regardless of the presence or absence of the paper 59, and the micro switch 55 is activated. It is designed to be kept in the ON state.

As a result, when the paper tray 45 is locked in the cut-in position, even when the pressing force of the paper 59 on the sensing lever 56 becomes smaller than the biasing force of the push button 58 because there is not enough paper 59, the sensing lever 56 is detected. This prevents the lower end of the lever 56 from lifting the paper 59 and protruding forward from the opening 52, thereby preventing the micro switch 55 from turning OFF.

Reference numeral 60 denotes a lock lever for locking the paper tray 45 in the cut-in position, one end of which is rotatably supported on the support plate 27, and biased by a spring (not shown) to engage the cam 61 of the hook 54. ,
A knob 62 attached to the other end protrudes outward to the right.

When the paper tray 45 is moved to the cut-in position against the bias of the coil spring 48, the lock lever 6
0 is pushed by the cam 61 and once rotated, the hook 5
4, and this paper tray 45
is locked in the interrupt position. Further, by rotating the lock lever 60 upward and disengaging it from the recess 63, the paper tray 45 can be unlocked.

The paper holder 46 is integrally installed on the right edge of the rectangular substrate 64 and has an inverted L-shape on the side, and the substrate 64 is placed on a guide plate 65 made of synthetic resin screwed to the front surface of the support plate 27. Guide pins 66, 6 screwed to the left and right parts of this board 64
6 is slidably fitted into a long hole 67 provided in the guide plate 65 and is supported so as to be movable left and right. This paper holder 46 protrudes forward from the opening 53 of the paper tray 45, and the front edge of the lower part positioned below the opening 53 fits into the groove 42 of the collar 44 to feed paper. It is connected to roller 41.

The paper 59 placed on the paper tray 45 has its left side in contact with the left side plate 19 and its right side in contact with the paper holder 46 to hold the paper 59 in a predetermined position. When the paper 59 is No. 4 in row A, the paper holder 46 is located at the right end of the opening 53 (FIG. 1), and when it is No. 5 in row B, the paper holder 46 is located at the left end of the opening 53.

Reference numeral 68 denotes a restraining lever whose upper part is rotatably supported on the right side of the paper holder 46, and a restraining claw 69 for pressing the lower right corner of the paper 59 is provided at its lower end.

Reference numeral 70 denotes a restraining lever whose upper part is rotatably supported on the left side surface of the left side plate 19, and a restraining claw 71 for pressing the lower left corner of the paper 59 is provided at its lower end.
This restraining claw 71 is connected to an opening 19 formed in the left side plate 19.
It is inserted inside from a.

These deterrent levers 68, 70 are provided with deterrent claws 69, 7.
1 is pressed against the paper 59 by a spring (not shown).

Reference numerals 72 and 73 are anti-slip pieces made of cork, which are attached to the front left and right sides of the paper tray 45 to prevent a plurality of sheets of paper 59 from being fed at the same time.

The paper 59 is held down by the restraining claws 69 and 71 at the lower left and right corners, and the lower part is held down by the paper feed rollers 40 and 4.
1, and a paper holder 46 is brought into contact with the right side to maintain an automatic paper feeding state (FIG. 3).

Reference numeral 74 indicates a toothed pulley, and reference numeral 75 indicates a relay gear, which are each rotatably supported by a shaft 76 on the outer surface of the right side plate 20 at a position slightly forward of the paper feed roller shaft 21.

The pulley 74 has a pin 77 protruding from its left side, and a ring-shaped toothed belt 79 is stretched between this pulley 74 and a toothed pulley 78 integrally provided on the left side of the relay gear 30. It's on a shelf.

Reference numeral 80 denotes a tension pulley that is brought into pressure contact with the upper peripheral portion of the belt 79.

The relay gear 75 has teeth formed over the entire periphery of the right side of its plate thickness, and a scale 81 representing the automatic paper feeding cycle is provided over the entire periphery of the left half.

Further, on the right side of the relay gear 75, a clutch lever 82 for preventing reverse rotation is rotatably supported by a pin 83. The clutch lever 82 is
It is biased by a spring 84, comes into contact with a protrusion 85 also formed on the right side, and waits at a fixed position (FIG. 2) where it can engage with the pin 77 of the pulley 74.

When the pulley 74 rotates forward (counterclockwise in FIG. 2) and the pin 77 engages with the connecting surface 86 of the clutch lever 82, the relay gear 75 is integrated with the pulley 74 while the clutch lever 82 maintains its fixed position. rotates forward.

Also, the pulley 74 rotates in the opposite direction (clockwise in Figure 2).
The pin 77 is connected to the blocking surface 87 of the clutch lever 82.
When the clutch lever 82 is engaged, the clutch lever 82 rotates counterclockwise (FIG. 2) against the spring 84 and is disengaged, so that the relay gear 75 does not rotate.

The scale 81 divides the entire circumference into 15 equal parts and displays numbers 0 to 14, with dots displayed between each number.

Reference numeral 88 denotes a clutch sleeve, which has a gear 89 formed on the outer periphery of its center portion, and is rotatably fitted into a diameter detail 90 on the right side of the paper feed roller shaft 21, and connects the right end portion of the diameter detail 90 to the right outer periphery. It sticks out to the side.

Reference numeral 91 denotes a clutch spring, which is wound in a coil shape with a thickness that tightly fits around the outer periphery of the clutch sleeve 88, and has an L-shaped engaging portion 92 integrally formed at its left end.

Reference numeral 93 denotes a circular fixed cylinder, the left side of which has the same diameter as the clutch sleeve 88, the right side of which has a larger diameter than the left side, and has a screw hole 94 formed therein.

Then, fit the left side of the clutch spring 91 into the right side of the clutch sleeve 88, and
The left side portion of the fixed cylinder 93 fitted to the right end of the clutch spring 91 is fitted into the right side of the clutch spring 91, and the fixed cylinder 93 is fixed to the diameter portion 90 with a screw 95.

The clutch spring 91 is integrally fixed to the paper feed roller shaft 21 via the fixed cylinder 93 by fitting and caulking a C-shaped retaining ring 96 to the outer periphery of the right end fitted to the fixed cylinder 93. .

Further, the left side of the clutch spring 91 is tightly fitted into the clutch sleeve 88, and when the engaging portion 92 is not engaged with the control cam 97, the clutch sleeve 88 is tightened and connected to the paper feed roller shaft 21. It is designed to maintain its state. A gear 89 of the clutch sleeve 88 meshes with the relay gear 75.

When the relay gear 75 rotates, the clutch sleeve 88 rotates, and the clutch spring 9
The paper feed roller shafts 21 connected by 1 rotate integrally.

The control cam 97 is rotatably supported by a shaft 98 at a position rearward of the relay gear 75 on the outer surface of the right side plate 20, and a gear 99 is formed around the entire circumference in the left half of the plate thickness. , the arcuate cam surface 100 is formed only at about 2/3 of the circumference of the right half.

The control cam 97 has a gear 99 meshing with the relay gear 75, and is waiting at a fixed position (FIG. 2) where the engaging portion 92 of the clutch spring 91 engages with one end of the arcuate cam surface 100.

As described above, when the control cam 97 is waiting at the fixed position, the engaging portion 9 is attached to the arcuate cam surface 100.
The clutch spring 91 that has engaged the clutch sleeve 88 is loosened so that it no longer tightens the clutch sleeve 88, and therefore the connection between the clutch sleeve 88 and the paper feed roller shaft 21 is cut off.

As the relay gear 75 rotates, the control cam 9
7 rotates (clockwise in FIG. 2), the arcuate cam surface 100 and the engaging portion 92 are disengaged, and the clutch sleeve 88 and paper feed roller shaft 21 are linked by the clutch spring 91 and rotate integrally. When the control cam 97 continues to rotate about 1/3 of its full circumference, the engaging portion 92 engages with the arcuate cam surface 100, cutting off the connection between the clutch sleeve 88 and the paper feed roller shaft 21. stops.

101 is opposed to the lower delivery roller 38,
The delivery rollers are arranged at three locations on the center, left and right, and are rotatably supported on the lower end of a spring supporting piece 102 whose upper end is fixed to the partition plate 23.
It is brought into pressure contact with the upper peripheral portion of the lower delivery roller 38.

Send out the printed paper (not shown),
When the platen 13 rotates forward (clockwise in FIG. 2) to automatically feed new paper, the platen gear 32,
Relay gear 30, gear 39, relay gear 75,
The clutch sleeve 88, paper feed roller shaft 21, and control cam 97 rotate in a predetermined direction.

As the gear 39 rotates, the lower delivery roller 38
is driven, and the printed paper (not shown) is
It is sandwiched between the upper and lower delivery rollers 38 and 101, and is stored in the storage section 35 via the delivery path 33.

Further, as the platen 13 rotates, the paper feed rollers 40 and 41 rotate, and the uppermost paper 59 is fed out from the paper tray 45, guided to the paper guide plate 5, and fed to the feeder provided between it and the partition plate 25. Entrance 1
03 and is fed to the platen 13. this paper 5
9 is sandwiched between the platen 13 and paper pan rollers 104 and 105 and set at a predetermined ejecting position, the engaging portion 92 of the clutch spring 91 is connected to the arcuate cam surface 100 of the control cam 97. are engaged, and the paper feed rollers 40 and 41 are stopped.

In this case, the scale 81 of the relay gear 75 is such that when a new sheet of paper 59 is set at the ejection position, 0 of the number matches the pointer provided on the case (not shown). There is.

Then, with the required printing operation, the platen 1
3 continues to rotate forward and the paper 59 is line fed and moved, the paper feed rollers 40, 41
is rotated in a predetermined direction by the movement of this paper 59 due to the action of a one-way clutch, so that no unnecessary burden is placed on the movement.

Further, as the paper 59 is moved by the line feed, the relay gear 75 rotates in a predetermined direction, and numbers on the scale 81 corresponding to the amount of printing appear sequentially on the pointer section to instruct the paper feeding cycle. Furthermore, the platen 13 corresponds to one cycle in which the printed paper is sent to the storage unit 35, a new paper 59 is fed to the platen 13, and the desired printing is completed.
, the relay gear 75 and control cam 97 rotate once.

In the above case, when the platen 13 rotates in reverse for collect or subscript printing during the printing operation, the relay gear 75 and the control cam 97 are stopped by the action of the clutch lever 82, so the control cam 97 and The correlation between the scale 81 and the paper feeding cycle is not impaired.

As is clear from the above, according to the present invention, when the paper tray is locked in the lower manual paper feeding position during manual paper feeding, the sensing lever of the micro switch is activated regardless of the amount of paper in the paper tray. Since the paper feed operation is maintained in a state in which the paper feeding operation is possible, there is no problem such as the case where the paper feeding operation is stopped by mistake and manual paper feeding becomes impossible when the paper tray is low on paper, as in the conventional case. Manual paper feeding can be performed reliably.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a partially cutaway perspective view, FIG. 2 is a partially cutaway side view, FIG. 3 is a longitudinal sectional view, and FIG. 4 is a partially cutaway side view. The figure is a cross-sectional view of the main parts showing the paper tray locked in the cut-in position, Figure 5 is a cross-sectional view showing the paper feed roller shaft and clutch sleeve connected by a clutch spring, and Figure 6 is a relay gear. FIG. 2 is an exploded perspective view of the pulley, clutch lever, clutch sleeve, clutch spring, control cam, and the like. 27...Support plate, 40...Paper feed roller, 45...
... Paper tray, 48 ... Spring, 52 ... Opening, 55 ... Micro switch, 56 ... Sensing lever, 60 ... Lock lever.

Claims (1)

[Scope of utility model registration request] a paper tray 45 pivotably supported on the support plate 27 so as to be able to swing vertically; a spring 48 that biases the paper tray 45 upward in order to press the paper placed on the paper tray 45 against the paper feed roller 40; In an automatic paper feeding device of a printing machine, which is equipped with a micro switch 55 that detects the presence or absence of paper on a paper tray 45 and stops automatic paper feeding when there is no paper,
A lock lever 60 is provided to lock the paper tray 45 in a lower position for manual paper feeding against the spring 48, and the micro switch 55 is attached to the lower side of the paper tray 45, and the micro switch 55 is turned on. - A sensing lever 56 to be turned off is swingably attached to the lower side of the paper tray 45, and a portion of the sensing lever 56 protrudes upward from an opening 52 provided in the paper tray 45 to When the paper tray 45 is in the upper position due to the spring 48, it floats above the support plate 27, and the paper tray 45
an automatic sheet feeding device for a printing machine, characterized in that the automatic sheet feeding device for a printing machine has a lower portion that moves in a direction to contact the support plate 27 and turn on the micro switch 55 when the device is locked in the lower position.