JPS5812176B2 - How to use the sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable to a printing machine, a copying machine, or a magnetic recording/transfer device that will be exemplified later, which has a sheet loading table and a sheet feeding device and processes sheets. When all sheets such as paper, copy paper, or magnetic sheets to which magnetic recording is transferred have been fed from the sheet loading table, the end of sheet feeding is detected by stepwise operation of a detection member. It relates to a stepwise detection device.

A detection member for detecting the end of sheet feeding is provided on the sheet loading table, and the detection member and the sheet feeding device cooperate with each other, so that when all the sheets have been fed, the sheet feeding device pneumatically operates. By using the fluctuation of the detection member,
For example, if a signal generating device such as a microswitch is operated mechanically, the device is simpler and cheaper than, for example, a sheet detecting device using a photoelectric conversion element, and there are advantages such as reliable operation. can get.

Generally, when all sheets have been fed on the sheet loading table, a signal indicating the end of sheet feeding is issued, and this signal is used to stop the operation of the machine. This is the fastest way to confirm the completion of sheet detection. This is very advantageous.

However, in the above-mentioned sheet processing equipment, if the operation of the entire device is immediately stopped when there are no more sheets on the sheet loading table, the last sheet will remain fed into the device. This may cause problems such as remaining in an unprocessed state.

In order to prevent such problems, it is necessary to continue operating the apparatus after the end of feeding of the last sheet is detected until this sheet is processed and discharged from the apparatus.

The present invention allows a sheet feeding device to cooperate with a sheet detection member, and instead of facing the sheet at the time when the sheet feeding device starts feeding the sheet after the sheet feeding is finished. In this case, the detection member is directly opposed to the detection member, and as a result, the fluctuation of the detection member due to the operation of the feeding device in a state where the sheet cannot be fed (hereinafter referred to as fully dynamic) is detected in stages, in other words, the sheet is not fed. A highly accurate and inexpensive machine that controls in response to the intermittent operation of the device, does not issue a signal at intermediate fluctuations, and only issues a signal at the last fluctuation, thereby obtaining the above-mentioned duration of operation time. It is an object of the present invention to provide a step-by-step detection device for the end of sheet feeding, which has a general configuration.

In this invention, although the device has an inexpensive mechanical configuration, it is highly accurate, and in particular, it uses a sheet feeding device that is equipped in any device, so it is highly versatile. Since the dispensing operation time is the standard for the retention time, the retention time can be set very rationally, and compared to using a timer, for example, it is much cheaper and easier to adjust. Excellent effects have been obtained.

The present invention will be explained below by citing an example of a magnetic recording and transcription device to which the present invention is applied.

In the right part of FIG. 1, a sheet mounting table 2 on which slave sheets 1 having magnetic recording layers are stacked and mounted is arranged.

The slave sheets 1 are set against the front plate 3, and are pressed against each other in order from the topmost sheet by a sheet feeding device 5 having suction cups 4 (only one is shown) arranged in parallel with a plurality of cylinders. The material is then delivered to a continuously rotating roller 6.7.

Trochanters 8 and 9 are provided along the vertical direction on the hanging portion 2a of the sheet mounting table 2, and the table 2 has both the trochanters 8 and 9 installed in a vertical elongated hole 10 provided in a stationary member. By fitting, they are supported so as to be slidable in the vertical direction.

A rack 11 is fixedly installed on the left side of the hanging part 2a of this table 2, and a binion 12 that rotates by detecting the height of the stacked sheets is engaged with this rack 11. The mounting table 2 rises whenever the sheet 1 is fed, and places the sheet at a position where the sheet can always be fed by the suction cup 4.

The suction cup 4 is attached to the tip of the arm tube 13 together with a holding member 4a made of a thin metal plate or the like to prevent double sheet feeding, and the arm tube 13 is fixed to the tube shaft 14.

The tube shaft 14 is rotatably attached to an arm 15 that is attached and supported by a shaft 15a.

An arm 17 with a trochanter 16 pivotally attached thereto is integrally attached to the tube shaft 14, and the trochanter 16 is inserted into the guide hole 1 provided in the immovable member.
8 is fitted.

Further, the arm 17 is pulled diagonally upward and to the right in the figure by a spring 17b whose one end is hung on a fixing pin 17a.

The arm 15 swings about a shaft 15a under the control of the rotation of a control cam group 19 provided at one side in the center in FIG. The arm tube 13 and the suction cup 4 are reciprocated along the shape of the hole 18.

The tube shaft 14 is connected to a suction pump (not shown), and when the suction cup 4 descends and presses against the uppermost sheet 1,
The sheet 1 is sucked by suction air, and then when the suction cup 4 rises and moves to the left in FIG. 5, it is exhausted and the sheet 1 is fed to the rollers 6.7.

Note that as the sheet feeding device 5, one using well-known rollers and separation claws may be used.

The sheet 1 held by the roller 6.7 is placed in the case 20.
The brush rollers 21a and 21b are fed into the case 20 and cleaned by passing between brush rollers 21a and 21b provided opposite each other in the case 20.

These rollers 21a and 21b are tubular with a large number of circumferential holes, and are connected to a cleaning suction pump (not shown) to suck dust removed from the slave sheet 1 by a brush. There is.

The slave sheet 1 which has been cleaned and taken out from the case 20 is fed into the plate 24 by feed rollers 22 and 23 which are constantly rotating while being in pressure contact with each other.

A master sheet 25 is placed in the center of the receiver plate 24, and a pressure plate 26 is placed above it.

The slave sheet 1 is fed onto the master sheet 25, and its leading end abuts against a positioning member 29 via discharge rollers 27, 28, so that it is correctly positioned.

Note that at this time, the roller 28 is driven by a drive device (not shown).
The roller 21 is continuously driven by
The slave sheet is placed in a slightly raised position by the cam group 19 via a connecting rod 30 and a lever 31 interposed in a support 30a provided on a stationary member, so as not to apply too strong a feeding force to the slave sheet. It has become.

The pressure plate 26 is connected to a connecting rod 32 by a shaft 26a, and the connecting rod 32 is connected to a lever 34 which is driven by the cam group 19 by a spring 33.
It is designed to move up and down according to the rotation of 19.

The pressure plate 26 has the slave sheet 1 as a mask-sheet 25.
When the sheet overlaps the soil and is correctly positioned by the positioning member 29, it descends guided by immovable guide rods 26b and 26c that are slidably fitted to the side portions of the sheet, pressing both sheets into close contact with each other. .

A support plate 36 on which electromagnets 35a and 35b are mounted is disposed below the support base 24, and a gear 38 that meshes with a drive gear 37 is fixed to a shaft 36a of this support plate 36.
The support plate 36 is constantly rotated.

The electromagnets 35a and 35b are energized only when the pressure plate 26 is in a lowered state, and form a magnetic field while rotating.
Recording transcription is accomplished between a master sheet and a slave sheet that are in close contact with each other.

On the pressure plate 26, an arm 39 and both arms 40a and 40b (one not shown) are provided which extend to the left and right in the figure, and each arm end has a downwardly directed presser 4.
1.42a and 42b (one not shown) are provided.

Sheet mounting table 2 below each presser 41° 42a, 42b
Punches 43, 44a, and 44b (one not shown) are arranged at positions close to 4, respectively, and corresponding punch holes 24a, 24b, and 2 are provided in the sheet mounting table 24.
4c (one not shown) is provided respectively.

Each punch 43, 44a, 44b has a punching blade 46 fitted into an immovable support member 45, and a plate 47 fixed to the upper part of the punching blade 46, as shown in FIG. 2a using the punch 43 as an example. Guide rods 48 and 49 having heads 48a and 49a for preventing removal are loosely fitted, and both guide rods 48 and 49 are also fitted into the support part 45, respectively, and both guide rods 48.
At the lower end of 49 is a presser foot 50 with a hole 50a through which the blade 46 passes.
The guide frames 48, 49 are each fitted with extensible coil springs 51, 52, 53, and 54, respectively.

Now, when the pressure plate 2b descends, the presser element 41
, 42 also descend to press the punching blade 46 of each punch.

The punching blades 46 of each punch 43, 44 are pushed by the presser 41, move down inside the support member 45 together with the guide rods 48, 49 against the springs 51, 53, and first press the slave sheet 1 with the holding plate 50. While pressing down and setting this sheet, positioning holes 1a, 1b, and 1c as shown in FIG. 2b are bored in this slave sheet 1 in cooperation with the punched hole 24a.

The slave sheet 1 is thus made into a duplicate sheet by having the positioning holes drilled therein and having a magnetic recording track 1d, which is actually invisible, as shown by a spiral drawn by a point source, transferred thereto.

After the pressure plate 26 has descended, when it begins to rise due to the rotation of the cam group 19, the pressing force of the discharge rollers 27, 28 is strengthened, and the sheet 1, which has become a duplicate sheet, is sent out to the left in FIG. .

The positioning member 29 is slidably supported by a support 29a provided on an immovable member, is given upward movement by a spring 55, and has its lower end brought into contact with an engaging portion 56a provided at one end of the lever 56. It's set.

The lever 56 is pulled by a spring 57 and has its other end abutted against the cam group 19, thereby lowering the positioning member from the sheet path when the pressure plate 26 begins to rise, thereby preventing the slave sheet from being ejected. Make it seem possible.

Thereupon, the slave sheet, which has become a duplicate sheet, is discharged onto the table 58 from the sheet tray provided on the left side in FIG.

As mentioned above, in this device, the sheet mounting table 2
The slave sheets 1 placed thereon are sequentially subjected to magnetic recording transfer processing and are discharged onto the tray 58.

Here, if slave sheet 1 is exhausted,
If this is detected and the apparatus is stopped, the last sheet will remain near the bottom of the pressure plate 26.

This can be completely prevented by keeping the device in operation for a sufficient period of time to feed the sheet again.

Hereinafter, the stepwise detection device for detecting the end of sheet feeding according to the present invention will be explained with reference to FIGS. 2 to 18.

Note that common members in each figure are indicated by the same symbols.

In FIG. 3, the sheet mounting table 2 is provided with a long hole 2b, and the elongated hole 2b is connected to a protruding member provided on the lower surface of the sheet feeding end detection member 60 arranged on the sheet placing table 2. The pin 61 and the switch pusher 62 are fitted into each other and are prevented from coming out by retaining rings 61a and 62a.

The detection member 60 has an elastic plate 63 with a smooth surface made of a thin metal plate or the like at the position where the suction cup 4 comes into contact on both sides of the upper surface of the detection member 60.
．． 64 (see Figure 6) by spot welding only the rear part (×
The detection member 60 can be easily lifted by attracting the free portion thereof.

Both end portions of the detection member 60 are slightly bent downward to form sliding feet 60a, 60b, and the forwardly extending portions are slightly bent upward so that they can be bent slightly downward to form sliding feet 60a and 60b. An engaging portion 60c for engaging the sheet is formed.

It should be noted that this detection member 60 may be any type as long as it can be sucked up by the suction cup 4, so its configuration can be arbitrarily selected other than the above, and there is no particular need to provide the elastic plates 63 and 64.

The detection member 60 configured as described above is supported on the table 2 by sliding legs 60a60b, a pin 61, and a stepped portion provided at the base of the switch pusher 62.

A spring 66 is attached to the switch pusher 62, one end of which is hooked to a pin 65 fixed to the rear lower surface of the sheet mounting table 2, which pulls the detection member 60 rearward.In the initial state, the pin 61 is suspended. Engagement portion 67 of locking lever 67
3 and 4 by being locked by a.
placed in the initial position shown in the figure.

Then, when the detection member 60 is in this position, the sheets are continuously fed while being stacked on the soil.

The locking lever 6γ is rotatably attached to the lower front surface of the sheet mounting table 2 by a shaft 68, and is given the habit of rotating to the right in FIG. 4 by a spring 69 fitted to the shaft 68. is locked.

On the other hand, on the side of the elongated hole 2b, a locking member 70 for locking the pin 61 in stages is provided in the elongated hole 70a provided at the base of the locking member 70.
It is disposed by being slidably attached to the lower surface of the sheet mounting table 2 by means of a shaft 71 that fits into the sheet mounting table 2 .

A spring 73 is hung on this locking member 70, and one end of the spring 73 is hung on a pin 72 fixed to the lower surface of the sheet mounting table 2.
The position of the locking member 70 is such that the rear end of the elongated hole 70a abuts against the shaft 71 and the locking portion 70b is positioned within the elongated hole 70a.

A guide pin 74 is provided on the side of the locking portion 70b of the locking member 70 and is fixed to the lower surface of the sheet mounting table 2.

Further, an actuator SWA of a switch SW for generating a sheet feeding end signal is arranged at the rear end edge of the elongated hole 2b.

Now, when the sheets on the two sheet placement tables are completely fed out by the suction cups 4, the suction cups 4 are then fully activated to suck the detection member 60 and lift it slightly.

When the detection member 60 is lifted, the pin 61 is disengaged from the locking lever 67, and the detection member 60 moves backward in the elongated hole 2b due to the action of the spring 66, and sinks due to its own weight. The pin 61 is locked by the locking portion 70b of the locking member 70 as shown in FIG. 5, and is stopped at this position.

At this time, the locking lever 67 brings its arm end 67b into contact with the hanging portion of the table 2, timing the return of the pin 61.

When the suction cup 4 is fully activated for the second time in this state, the detection member 60 is lifted slightly again, the pin 61 is now disengaged from the locking member 70, and the detection member 60 is moved by the spring 6.
6 moves rearward all at once and presses the actuator SWA with the switch presser 62 to generate a detection signal indicating the end of sheet feeding.

The shifted detection member 60 can be easily returned to its initial position by hooking the sheet onto its engaging portion 60c and pushing it back when replenishing sheets next time.

In the device of the present invention, a signal indicating the end of sheet feeding is issued by the fluctuation of the detection member 60 caused by the second pneumatic actuation of the suction cup 4, so that an expensive and difficult-to-adjust device such as a timer can be used. Compared to using , time limit setting is extremely rational and it is very cheap.

Another embodiment of the invention is shown in FIGS. 1-9.

7 and 8, the pin 61 of the detection member 60
is locked by a first locking portion 75a of a gradual locking lever 75.

The locking lever 75 is rotatably attached to the front lower surface of the sheet mounting table 2 by a shaft 76, and a spring 77 fitted to the shaft 76 gives it a left-handed rotation behavior about the shaft 16 in FIG. Pin 61 due to this habit
is locked by the first locking portion γ5a, and the pin 61 is also locked by the first locking portion γ5a.
The locking lever 15 that is locked at the first locking portion 75a
It has a second locking portion 75b on the opposite side, and is disposed in a pivoted position on the lower surface of γ5.

A spring 80 is fitted to the shaft γ9, one end of which is hooked to the back of a notch 75c provided in the locking lever 15, and the other end is hooked to the rear of the buffer member 78.
In the initial state, the front edge thereof is the second locking portion 75b.
This buffer member 18 is located at a position protruding from the edge of.

When the sheets are completely fed out and the detection member 60 is slightly lifted by the next pneumatic operation of the suction cup 4, the pin 61 is disengaged from the locking portion 75a of the locking lever 75, and the locking lever 75 is moved by the spring. Depending on the handedness of 11, the arm 1
5d rotates at the position where it abuts against the hanging portion of the sheet mounting table 2 (see # in FIG. 9).

On the other hand, the lifted detection member 60 is lowered by its own weight, and its pin 61 is rotated and placed on the five locking levers 15.

The pin 61 is buffered by abutting against the front side edge of the buffer member γ8, and falls into the second engaging portion 75b and is locked therein.

Note that the detection member 60 and the locking lever 15 operate extremely quickly, almost instantaneously.

When the suction cup 4 performs a second pneumatic operation while the pin 61 is engaged with the second engagement part 75b, the detection member 60 is again lifted to a certain height, and the pin 61 is engaged with the second engagement part 75b. The detecting member 60 comes off from the lever 75, passes over the lever 75, moves rearward due to the force of the spring 66, and pushes the actuator SWA of the switch SW with the switch pusher 62.

Note that at this time, the locking lever 15 is still in the position shown in FIG. 9, and the back beveled edge 75f of the arm portion 75e is placed in the elongated hole 2b position. ,
The pin 61 can be easily engaged with the first engaging portion 75a.

In the present invention, by performing stepwise control using a single locking lever in this manner, the range of the first fluctuation of the detection member can be reduced.

That is, in the case of the embodiment shown in FIG. 1, the movement distance of the pin 61 during the first fluctuation is smaller than in the case of the embodiment shown in FIG. The correspondence relationship will improve.

10 to 12 show a case where a bellows 81 provided below the intake hole 2c formed in the front part of the sheet mounting table 2 is used as the detection member.

In this case, an auxiliary plate 82 having a bellows hole 82a is provided on the lower surface of the sheet mounting table 2.

A support plate 83 is fixed to the lowered front part of the auxiliary plate 82 with screws 84 and 85.

Both ends of this support plate 83 are bent and raised to support portions 83a,
83b (see FIG. 12), and a switch SW is installed inside one of the supporting parts 83a through screws 86, 87 (see FIG. 12).
(see Figure 10).

The switch SW is provided with an auxiliary actuator 88, and a switch pressing rod 89 corresponds to the lower part of the auxiliary actuator 88.

As shown in FIG. 11, the seven-piece pressing rod 89 has its proximal end loosely fitted into the support part 83b of the support plate 83, and its tip end connected to a connecting member 90 provided at the bottom of the bellows 81. It is fitted and supported.

The tip end 89a of the switch press rod 89 corresponds to a control member 92 pivotally connected to the support portion 83a of the support plate 83 via a shaft 91.

The control member 92 has a tip portion 92a (see FIG. 10) that protrudes from the side of the switch pressing rod 89, and depressed portions 92b and 92c provided on both sides of the tip portion. On the side opposite to the portion 92a, the spring is attached to the engaging portion 92e with the portion 92d in the center.

92f are provided respectively.

A spring 94 for force point conversion is attached to the spring attachment portion 92a, and one end is fixed to a pin 93 fixed to the support portion 83a.In the initial state shown in FIG. 10, the engagement portion 92f is The control member 92 is placed in a position where it abuts the pin 93 and the pointed end 92a is located to the right of the path of the tip 89a of the switch push rod 89.

Although the auxiliary actuator 88 of the switch SW extends to the position of the recess 92c of the control member 92,
It does not extend to the recess 92b.

When the sheet is completely fed out by the suction cup 4, the bellows 81 is sucked and contracted by its pneumatic action, and lifts up the tip end 89a of the switch pressing rod 89 via the connecting member 90.

At this time, the switch pressing rod 89 has its tip 89a
The pointed end 92a of the control member 92 directs the recess 92b and presses against the recess 92b.

When the concave portion 92b is pressed, the control member 92 rotates to the right about the shaft 91, and the attachment is performed by moving the position of the portion 92d from the left side of the pin 93 to the right side, and as shown in FIG. Joint part 9
2e is brought into contact with the pin 93, and the point 92a is moved to a position to the left of the path of the tip 89a of the switch press rod 89.

When such a position is given to the control member 92, the tip end 89a of the switch press rod 89 moves down to the old position as the suction cup 4 separates from the sheet mounting table 2 and the bellows 81 expands.

Therefore, when the suction cup 4 performs the second fully dynamic sheet feeding operation, the tip 89a of the switch pressing rod 89 is now directed toward the recess 92c of the control member 92, and this control member 92 while rotating it to the left around the axis 91,
The auxiliary actuator 88 of the switch SW is pressed to operate the switch SW and generate a signal for the end of sheet feeding.

In this way, the control member 92 distributes the path of the tip 89a of the switch press rod 89, thereby causing the bellows 81
This makes it possible to extract the fluctuations in stages.

Figure 14 shows the sea The case where it is used for jet dispensing is shown.

A plate 100 having a groove 100a is mounted on the sheet mounting table 2, and a plate-like detection member 1 is placed in the groove 100a.
01 is fitted loosely.

The sealer 95 is disposed above the detection member 101 with its shaft 95a appropriately supported.

This roller 95 rotates once during sheet feeding and feeds the sheets on the mounting table 2 one by one, and a well-known sheet separating claw (not shown) that cooperates with this roller 95 is used. is optional, and in order to bring this roller 95 into pressure contact with the sheet, as the number of sheets decreases, this roller 95
It is possible to arbitrarily select whether to lower the sheet mounting table 5 or to increase the force of the sheet mounting table 2.

The lower surface of the detection member 101 has an elongated hole 2b of the sheet mounting table 2.
Pins 102 and 103 are provided to fit into the pin 10.
3 is a connecting member 1 with a switch pusher 62 implanted in the rear part.
04 is rotatably fitted.

In the initial state, the detection member 101 is connected to the connection member 10.
The pin 103 is placed in a position where it is engaged with the rear end line of the elongated hole 2b by the force of the spring 66 applied to the rear end of the elongated hole 2b.

Further, the switch SW is placed below the connecting member 104, and the actuator SWA is connected to the switch pusher 6.
It is located in front of 2.

A control member 92 is rotatably mounted on the lower surface of the sheet mounting table 2 above the switch SW by a shaft 91.
With the spring 94 and the pin 93 fixed to the stand 2,
Its direction can be determined.

Similarly to the embodiment shown in FIG. 10, the control member 92 is used to change the path of the switch pusher 62, and in the initial state, the tip 92a is directed away from the path of the switch pusher 62. is also located at the bottom in FIG.

Note that the actuator SWA corresponds to the recess 92b.

Now, in the state shown in FIGS. 14 and 15, after the sheet is fed out by the sheet feeding roller 95, the sheet feeding operation of the next roller 95 becomes fully dynamic, and the detection member 101 is merely pushed forward against the spring 66.

When the detection member 101 is pushed forward, the switch pusher 62 presses the recess 92c of the control member 92, causing the control member 92 to rotate to the left around the shaft 91, as shown in FIG.

Therefore, the control member 92 is placed in a position where the tip portion 92a is placed above the path of the switch pusher 62 by the first movement of the detection member 101.

When the roller 95 stops rotating for feeding, the detection member 101 detects the coupling member 10 due to the force of the spring 66.
4. Both the pin 62 moves back to the old position.

Therefore, when the roller 95 performs the second fully dynamic sheet feeding operation, the switch presser 62 is pulled by the shifting detection member 101 and presses the recess 92b, and at the same time presses the actuator SWA. Then, the switch SW generates a signal indicating the end of sheet feeding.

In FIGS. 18 and 19, the sheet feeding roller 95
A further embodiment of the invention is shown using the .

In FIGS. 16 and 19, a support plate 105 is fixed to the lower surface of the sheet mounting table 2.
05, a detection port-sea 106 is rotatably mounted on a shaft 101 at a position corresponding to the roller 95 for detecting the end of sheet feeding in cooperation with the roller 95.

The detection port-sea 106 has a cut-off portion 106a for sheet detection on a part of its circumferential surface, and its shaft 101 has one end attached to the lower surface of the sheet mounting table 2 and the other end attached to the roller 1.
A torsion spring 109 is fitted to each pin 108 implanted in the end face of the roller 106, giving the roller 106 the ability to rotate in the direction of the arrow a.

This roller 106 is placed in the initial position shown in FIG. 18 by the pin 108 colliding with the pin 110 implanted in the support plate 105, and in this state, the cut-off portion 106a is larger than the hole 2b. In FIG. 18, it is placed at a position shifted to the left by 5 degrees.

A first control member 111 having a recess 111a at its tip is fixed to the shaft 107 of the roller 106.
11a is placed at a position substantially coincident with the cut-off portion 106a.

On the other hand, on the right side of the roller 106 in FIG.
A second control member 112 has a sharp locking portion 112a that is long enough to fit into the rotation radius of the first control member 111.
13 to the support plate 105, and in the initial state, it is placed in a horizontal position by a spring 115 hooked on a pin 114 fixed to the support plate 105 at one end.

Now, when the sheets have been fed out and the sheet feeding roller 95 contacts the detection roller 106 as shown in FIG. 18 and performs the first pneumatic sheet feeding operation, the detection roller 106 It rotates in the opposite direction to the arrow a against the torsion spring 109.

The circumference of the roller 106 is set to be slightly longer than the circumference of the roller 95, and when the roller 95 rotates once,
This roller 106 rotates approximately 3/4 rotation.

At this time, the first control member 111 rotates together with the roller 106, pushes the second control member 112, and causes its locking portion 112a to engage with the recess 111a, as shown in FIG.

When the feeding operation of the sheet feeding roller 95 is finished, the detection roller 106 attempts to return to the previous position due to the strength of the spring 109, but this return movement is caused by the first control member 111 and the second control member engaged therewith. The rollers 106 are held in the position shown in FIG. 20 by the members opposing each other.

In this state, when the sheet feed roller 95 performs the second pneumatic sheet feed operation, the detection roller 1
06 further rotates against the spring 109, and the 21st
As shown in the figure, the cut-off portion 106a corresponds to the roller 95.

At this time, the roller 95 falls by the height of this cut-off portion 106a and changes its position greatly.

This fluctuation is directly sent to the detection switch SW by the roller 95 or its shaft 95a, or indirectly using a lever or the like.

Note that when the first control member 111 rotates from the position shown in FIG. 20 to the position shown in FIG. Returning to the position, roller 1
06 is released from the roller 95 and the first control member 1
11 and will not be prevented from moving back to the old position.

In the present invention, the sheet feeding roller can thus be used to detect the end of sheet feeding.

In each of the above embodiments, the signal is generated by the second fluctuation of the detection member, but in the present invention, the detection member is pneumatically activated multiple times, and the final fluctuation is It is optional to cause the signal to be generated multiple times.

For example, in the embodiment shown in FIG. 3, this can be done by arranging the detection member 70 and its associated members in (N-1) sets for N fluctuations, and for example, as shown in FIG. 18. In the embodiment, the diameter of the roller 106 is set larger than that of the roller 95 according to the number of steps of variation, and (N-1) sets of second locking members 112 and members associated therewith are attached to the roller 106. Each can be easily achieved by corresponding installation.

[Brief explanation of drawings]

Fig. 1 is a side sectional view showing an example of a magnetic recording and transcription device to which the present invention is applied, Fig. 2a is a side sectional view showing an example of the configuration of a punch, and Fig. 2b is a plan view showing an example of a reproduced magnetic sheet. , FIG. 3 is a side sectional view of a stepwise detection device for the end of sheet feeding showing an embodiment of the present invention, and FIGS. 4 and 5 show the planar configuration and operating mode of the device example shown in FIG. 3. 6 is a perspective view showing an example of a member for detecting the end of sheet feeding used in the apparatus of the present invention, and FIG. 7 is a stepwise detection device for detecting the end of sheet feeding according to another embodiment of the present invention. , FIGS. 8 and 9 are a bottom view showing the planar configuration and operating mode of the apparatus example shown in FIG. 7, and FIG. 10 is a sheet feeding diagram showing still another embodiment of the present invention. 11 is a left side view showing the side configuration of the device example shown in FIG. 10; FIG. 12 is a bottom view showing the planar configuration of the device example shown in FIG. 10. 13 is a side view showing the operating mode of the control member in the example of the device shown in FIG. 10, and FIG. 14 is a side sectional view of a stepwise detection device for the end of sheet feeding showing a different embodiment of the present invention. , Figure 15 to 1
FIG. 7 is a bottom view showing the planar configuration and operating mode of the example of the device shown in FIG. 14, and FIG. 18 is a still different embodiment of the stepwise detection device for the end of sheet feeding, showing still another embodiment of the present invention. 19 is a front sectional view showing the rear configuration of the device example shown in FIG. 18, FIG.
FIG. 1 is a side sectional view showing the operating mode of the example device shown in FIG. 18. DESCRIPTION OF SYMBOLS 1... Sheet to be fed, 4... Suction cup, 5... Sheet feeding device, 60... Member for detecting the end of sheet feeding, 62 ...Switch pusher, 67...Latching lever, 70...
Locking member, SW...Switch as a detection signal generating device for the end of sheet feeding, 75...Stepwise locking lever, 81...Bello, 89... ...Switch push rod, 92...Control member, 95...
...Sheet feeding roller, 101...Detection member, 106...Detection roller with cut-off portion 106a, 111...First control member, 112
...Second control member.

Claims (1)

[Scope of Claims] 1. A sheet feeding device that intermittently feeds sheets placed on a sheet loading table, and a side facing the sheet feeding device is formed to be able to float, and a detection member having a habit of retracting from a sheet feeding position facing the sheet feeding device along a long hole drilled in the sheet loading table; and a detection member provided on the bottom surface of the detection member; a protrusion member and a pressing member extending from the elongated hole of the sheet mounting table; a locking means that engages with the protrusion member and holds the detection member in the sheet feeding position; a locking member rotatably supported, and a sheet feeding end signal generating means disposed at a retracted position of the detecting means and pressed by a pressing member of the detecting means. However, when the sheet feeding device and the detection member directly face each other when the sheet runs out, the detection member floats and the protruding member is disengaged from the locking means and the detection member stops feeding the sheet. Although the detecting member is retracted from the extended position, the protruding member of the detecting member is locked by the locking member and the retracting of the detecting member is stopped, and when the detecting member floats again, the protruding member and the locking member are stopped. A stepwise detection device for the end of sheet feeding, characterized in that the locking is released, the detection member is retracted as it is, and a sheet feeding end signal generating means is actuated by a pressing member of the detection member.