JPH065315Y2 - Paper insertion section of equipment that uses paper - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet insertion unit provided for manually inserting a sheet such as a document or a transfer sheet into an apparatus using a sheet such as a copying machine and a fax machine.

2. Description of the Related Art Conventionally, for example, in a paper insertion portion provided for manual insertion of a copying machine, when the paper manually inserted is carelessly inserted without a predetermined interval, the papers are overlapped. If a subsequent sheet is inserted in the paper insertion path at an interval shorter than the predetermined interval that can be processed by the copier to prevent jamming and malfunction of the copier itself, the following paper There is one that is provided with a mechanism that prevents the insertion of the.

As a method of temporarily blocking the paper, for example, a pair of transmissive sensors for upstream feeding of the paper are provided near the pair of rollers for paper feeding provided at the entrance of the paper insertion path. When the sensor detects the leading edge of the paper, the roller rotates to feed the paper, and when the sensor detects the trailing edge of the paper, the roller stops and the subsequent paper is not placed at the specified interval. When inserted, there is a device that makes the paper stand by.

Further, between the roller and the sensor, a blocking member having a comb-shaped stopper portion for temporarily blocking the sheet insertion path, which is a separate component from the roller, in a direction transversely crossing is provided rotatably, and the blocking member is provided with a solenoid. There is also a system in which the lever is retracted from the sheet insertion path through a lever when it is not operated, and the sheet insertion path is blocked when the solenoid is operated to temporarily prevent the insertion of the sheet.

Further, a comb-shaped blocking member that is rotated by a solenoid similar to the above is provided, and a swingable detection piece whose lower end projects into the sheet insertion path in a free state is provided, and a transmission type detection piece is provided above the detection piece. A sensor is arranged, and the lower end of the detection piece is abutted by the paper passing through the paper insertion path and it rotates, and the sensor inserts and passes the paper depending on the presence or absence of light transmission by the swing of the detection piece. In some cases, when a sheet is continuously inserted within a short time, the sheet following the sheet is temporarily blocked by the blocking member.

However, in the case of a paper insertion part that temporarily blocks the insertion of paper by stopping the rollers without providing the above-mentioned blocking member, when a thick paper is inserted, it passes between the rollers. Therefore, there is a problem in that the paper cannot be reliably blocked.

In addition, when a blocking member having a comb-shaped stopper portion is used between the roller and the sensor, the sheet can be reliably blocked. In this case, however, the pair of transmissive sensors use the sheet insertion path. Separately attached to the upper and lower guide plates to be formed, and since the blocking member is a separate part separate from the sensor, it must be done individually when assembling them, so the assembly cost is that much There was a problem that it took a lot.

Further, there is a problem in that it is difficult to achieve compactness because a large space is required to mount all of these parts.

Furthermore, when a transmissive sensor is attached to the upper part of the detection piece, the blocking member and the detection piece for detecting the insertion of the sheet are separate parts, so that much space and assembly cost are required. There was a problem.

Purpose This invention was made in view of the above problems,
The same member is used to detect the inserted paper and to temporarily prevent the paper from being inserted into the paper insertion path if the paper is inserted without a predetermined gap. The purpose is to make sure that the parts to be used are installed in a small space and the installation cost is not high.

In order to achieve the above-mentioned object, this invention is inserted into a paper insertion path in a paper insertion portion provided for manually inserting a paper such as a document or a transfer paper into a device using paper such as a copying machine. A sheet insertion detector having a detection piece displaced by the sheet and a locking member capable of locking the detection piece at a position for preventing the insertion of the sheet are provided, and the detection piece is locked by the locking member. By doing so, the insertion of paper can be prohibited.

Hereinafter, a specific description will be given based on an embodiment of the present invention.

FIG. 1 is an external perspective view showing an embodiment of a sheet inserting section according to the present invention, and FIG. 2 is a schematic configuration diagram showing an example of a movable original copying machine provided with the sheet inserting section.

This sheet inserting section is used in a document moving type copying machine as shown in FIG. 2, for example, and a document inserting section 1 is provided for manually inserting a sheet as a document or a transfer machine into the copying machine.
It is also used in the transfer paper insertion section 2.

In the copying machine, when the paper Pa, which is the transfer paper, is inserted in the direction of the arrow A from the paper insertion path 3 of the transfer paper insertion unit 2, the insertion of the paper Pa is performed by inserting the paper insertion path provided near the entrance of the paper insertion path 3. The detector 4 detects, the inlet roller 5 on the downstream side of the paper feed rotates, and the paper Pa is sent to the registration roller 6, which is detected by the registration sensor 7 and the leading end thereof is gripped by the nip of the registration roller 6. Stand by in the crowded state.

On the other hand, when the sheet Pb, which is a document, is inserted from the sheet insertion path 3 of the document insertion section 1 in the direction of the arrow B, the insertion of the sheet Pb is detected by the sheet insertion detector 4 provided near the entrance of the sheet insertion path 3. Is detected and the paper feed roller 1 provided downstream of the paper feed
1 rotates, the paper Pb is sent out, it is reversed in the turn conveyance path 12 and is detected by the sensor 14 immediately before the contact glass 13, and then the image is scanned on the contact glass 13 by the lamp, and the reflected light thereof is reflected. Is imaged on the surface of the photosensitive drum 15.

Due to the sheet detection by the sensor 14, the sheet Pa (transfer sheet) which has been waiting by the chip of the registration roller 6 is sent to the photosensitive drum 15 by the registration roller 6 which starts rotating at an accurate timing, and the image is transferred there. After being fixed, the sheet is fixed, passes through the sheet discharge sensor 16, and is discharged to the outside of the apparatus in the direction of arrow C.

Reference numeral 8 in FIG. 2 is a paper feed cassette used when the transfer paper is automatically fed.

As shown in FIG. 1, the transfer sheet insertion portion 2 has a detection piece 17 displaced by the sheet Pa inserted in the sheet insertion path 3.
And the sheet insertion detector 4 having a solenoid and a solenoid 19 capable of locking the detection piece 17 at a position shown in the figure for preventing sheet insertion.
The locking member 21 driven by the locking member 21 is provided, and the detection member 17 is locked at the position shown in the drawing by the locking member 21 so that the insertion of the paper Pa from the direction of the arrow D can be prohibited. .

As shown in FIG. 3, the detection piece 17 of the sheet insertion detector 4 is bent at a substantially right angle to form a plate-shaped detection portion 17a, and an upper portion is formed with a light shielding portion 17b. The upper side is pivotally supported by the sensor body 22 of the sheet insertion detector 4 by a shaft 23 so as to be swingable in the E direction.

The sensor body 22 of the sheet insertion detector 4 is fixed to one upper guide plate 3a forming the sheet insertion path 3 by a bracket (not shown).
A part of the detection piece 17 is located on the upper and lower guide plates 3 shown in FIG.
A sensor 2 which is a transmissive photo sensor arranged so as to block the transmission of light when it is in a position where it falls into the openings 3c and 3d formed in a and 3b and prevents the insertion of paper.
4, when the paper Pa is inserted from the direction of arrow D shown in FIG. 4 and the detection piece 17 rotates in the direction of arrow E ₁ , the light shielding portion 17b retracts from the sensor 24 and transmits light. It detects it and turns it on.

A stopper portion 17c is formed on the right side edge of the light shielding portion 17b of the detection piece 17 as clearly shown in FIG. 4, whereby the detection piece 17 is rotated by its own weight in the direction opposite to the arrow E _1. When this happens, the stopper 17c contacts the right end surface of the sensor body 22 and regulates the amount of rotation so that it does not descend beyond the position shown in FIG.

As shown in FIG. 1, the locking member 21 is formed by bending a plate material into an L-shape to form a fixed portion 21a and a sliding portion 21b.
It is fixed in the groove formed on the movable shaft 9 (may be rotatable by a pin). In addition, the sliding portion 21b has two elongated holes 21 along the moving direction of the movable shaft of the solenoid 19.
c and 21d are formed respectively, and stepped screws 25 and 2 are formed therein.
5 are inserted, and the locking member 21 is screwed so as to be slidable in the arrow F direction.

As shown in FIG. 3, the locking member 21 is higher than the height of the locking member 17d which is the end portion of the detection piece 17 when the detection piece 17 is in the position (down position) for preventing the insertion of the sheet. The two slides 27, 27 are provided on the upper surface of the upper guide plate 3a so that the lower surface of the sliding portion 21b is located at a slightly higher position.
Is fixed, and thereby the position in the height direction is accurately positioned.

Further, the lower end of the fixing portion 21a of the locking member 21 is engaged with the other end of the spring 26, one end of which is engaged with the fixing portion of the upper guide plate 3a, thereby urging force to the left in FIG. Is always acting.

It should be noted that, also in the document insertion portion 1 (FIG. 2), the paper insertion portion having the paper insertion detector 4 having the detection piece 17 shown in FIG. It is provided exactly as in the case of the paper inserting section 2.

Next, the operations of the respective parts when a sheet is inserted into the document insertion part 1 and the transfer paper insertion part 2 which are the paper insertion parts have the same configuration. A detailed description will be given as a representative.

When a sheet of paper Pa, which is a transfer sheet, is manually inserted in the direction of arrow A from the transfer sheet insertion portion 2 of FIG.
₁ reaches the position of the paper insertion detector 4 provided near the entrance of the paper insertion path 3.

At this time, the sheet insertion detector 4 is in the state shown in FIG. 3, and the detecting portion 17a is in the state of falling into the respective openings 3c, 3d of the upper and lower guide plates 3a, 3b.
Since 9 is in the off state shown in FIG. 4, the locking member 21 is moved leftward by the urging force of the spring 26.
Therefore, the right end of the sliding portion 21b is at a position retracted from the upper portion of the locking portion 17d of the detection piece 17.

In such a state, from inside the paper insertion path 3 is indicated by an arrow D in FIG.
The sheet Pa ₁ inserted in the direction abuts on the detection portion 17a of the detection piece 17 that is inclined in the paper insertion path 3, and the insertion force causes the detection piece 17 to rotate in the arrow E ₁ direction. While being pushed up, it is further inserted along the lower surface of the detection unit 17a, and is fed further downstream by the rotating inlet roller 5 (FIG. 2).

Further, since the position of the detection piece 17 changes due to the insertion of the sheet Pa ₁ , the sensor 24 of the sheet insertion detector 4
Is turned on at the position where the light transmission is detected in FIG. 4 from the state where the light is blocked in FIG. 3 (OFF), and when the trailing edge of the paper Pa ₁ passes the detection piece 17, it is again in the third state. It returns to the position shown and turns off.

Then, when the second sheet of paper Pa ₂ that is the transfer sheet is inserted from the transfer sheet insertion portion 2, when the insertion time is longer than a predetermined time, the above-mentioned 1 Similar to the case of the _first sheet of paper Pa ₁ , it is inserted into the apparatus and further fed to the downstream side by the entrance roller 5, but the insertion time is carelessly inserted at intervals shorter than a predetermined time. In such a case, the sheet Pa ₂ is temporarily blocked from being inserted by the detection piece 17 which also serves to block the insertion of the sheet insertion detector 4.

That is, when the sensor 24 of the paper insertion detector 4 detects the leading edge of the _first sheet of paper Pa ₁ and turns it on, the inlet roller 5 rotates, and the rotation of the inlet roller 5 causes the sheet Pa to rotate.
₁ is conveyed, it passes the detection piece 17, and the sensor 2
When 4 detects the trailing edge of the sheet (turns off), the solenoid 19 is controlled by a controller (not shown) to turn on.

Therefore, as shown in FIG. 3, the movable shaft of the solenoid 19 moves to the right, and the right end of the sliding portion 21b of the locking member 21 moves to the upper portion of the locking portion 17d of the detection piece 17 as illustrated. As a result, the insertion of the sheet is blocked, so that even if the _second sheet Pa ₂ is inserted in this state, the sheet Pa ₂ only comes into contact with the detection portion 17a of the detection piece 17 and the detection piece 17
Does not rotate in the direction opposite to the direction indicated by arrow E ₂ , so that it cannot be inserted further.

Then, when the sensor 24 detects the trailing edge of the _first sheet of paper Pa ₁ and a predetermined time elapses, the solenoid 19 is controlled to be turned off again, so that the locking member 21 is moved to the fourth position by the spring 26. As shown in the figure, it is moved to the left and retracted from the position that prevents the insertion of paper. Therefore, if the sheet Pa ₂ whose insertion is temporarily blocked before the detection piece 17 is reinserted into the sheet insertion path 3 at this point, the result is 1
It can be inserted up to the position of the entrance roller 5 as in the case of the _first sheet Pa ₁ .

Similarly, the same operation is repeated for the third and subsequent sheets.

It should be noted that the sensor 24 detects the trailing edge of the sheet, turns the solenoid 19 on, and then turns it off again for a predetermined period of time within the copying machine (the same applies to other devices) when two or more sheets are present. It is determined by the sheet processing capacity time of the device that does not cause overlapping or malfunction.

Specifically, the time is shifted by a predetermined number of pulses by an encoder sensor (not shown) that rotates integrally with the photosensitive drum 15 of FIG. 2, or after the registration sensor 7 confirms that the trailing edge of the sheet has passed, the transfer sheet insertion section 2 paper insertion detector 4
There is a method of turning off the solenoid 19 when the leading edge of the next sheet is detected.

Further, the solenoid 19 is turned on and the detection piece 17 is locked at a position that prevents the insertion of the sheet. In addition to the above case, the previously inserted sheet causes a conveyance failure in the conveyance path on the way. In some cases, automatic paper feeding is selected by the paper feeding cassette 8 (FIG. 2).

As described above, according to the insertion portion of this embodiment, the upper and lower guide plates 3a and 3b are provided with the openings 3c and 3d only in the detection piece 17, respectively.
By forming only 3d, it is not necessary to provide a large number of openings as in the case where a comb-shaped blocking member is provided, and therefore, it becomes difficult for the sheet to be folded or jammed, and thus the reliability is improved.

FIG. 5 shows another embodiment of the paper insertion portion in which a locking member for blocking the rotation of the detection piece is used as a rotary lever, and the portions corresponding to those in FIG. 3 are designated by the same reference numerals.

This paper inserting portion is provided with a rotating lever 31 which can rotate in the direction of arrow G, instead of the locking member 21 of the above-described embodiment (compared with FIG. 3), and which is provided on the paper inserting path 3. A shaft 32 supports the bracket 32 fixed to the guide plate 3a.

Then, one end of the rotating lever 31 is rotatably connected to the movable shaft of the solenoid 19 by the pins 34 and 35 via the connecting plate 36, and the spring 26 is connected to a portion of the rotating lever 31 close to the pin 34. With one end of the
The other end is engaged with an engaging member 37 fixedly mounted on the upper guide plate 3a to apply a rotational urging force in the arrow G ₁ direction to the rotating lever 31. Therefore, when the solenoid 19 is in the off state, the rotation lever 31 is at the position shown by the phantom line, and when it is in the on state, it moves to the position shown by the solid line to engage the detection piece 17 at the position where the insertion of the paper P is blocked. Stop.

Even in this case, the same operational effects as those of the above-described embodiment can be obtained.

FIG. 6 shows another embodiment of the paper insertion portion in which the paper insertion detector is arranged with the detection portion and the light shielding portion spaced apart from each other, and the portions corresponding to those in FIG. It is attached with a code.

This paper insertion portion pivotally supports a shaft 43 on both side plates 41 and 42 of a copying machine via bearings.
The detection piece 17 is fixedly installed in the approximately middle portion of
A light shielding plate 44 is fixedly provided at one end of 3. Then, one end of the light shielding plate 44 is rotatably attached to the drive lever 45,
The light shielding portion 44a at the other end is located at a position where the sensor 24 of the sensor body portion 22 can shield light.

A long hole 45a is formed at one end of the drive lever 45, and the movable shaft 19a of the solenoid 19 is provided in the long hole 45a.
The drive pin 46 fixed to the above is inserted so as to be movable in the arrow H direction. Then, the spring 26 is attached to the drive pin 46.
Is engaged with one end and the other end is engaged with a locking pin 47 which is fixed to a fixed portion of the copying machine.

Therefore, in the normal state, the drive pin 46 is biased in the direction H ₁ shown by the arrow in FIG. 7 and stops at the position shown in FIG. The shaft 19a is in a protruding state,
The detection piece 17 is stopped at the position shown in the figure where the light shielding plate 44 is regulated by a stopper not shown due to its own weight,
The detection unit 17a is in a state of falling into the openings 3c and 3d of the sheet insertion path 3. Further, since the drive lever 45 is pushed rightward, the drive pin 46 is located leftward in the elongated hole 45a.

When the paper P is inserted into the paper insertion path 3 in this state,
As shown in the figure, the detection unit 17 is pushed up by the paper P.
Since "a" rotates upward, the drive lever 45 moves to the left, and accordingly, the drive pin 46 changes to the right in the elongated hole 45a. Therefore, the sheet P can be inserted all the way without being blocked, and when it is fed by the roller for feeding and passes through, the detection piece 17 returns to the original state of FIG. 7 again by its own weight. .

When it is desired to prevent the insertion of the paper P, the solenoid 19 shown in FIG. 7 is turned on to move the movable shaft 19a to the right, and the drive pin 46 integrated with the movable shaft 19a also moves in the elongated hole 45a. It moves to the right and stops at the right end of the long hole 45a as shown in FIG. Therefore, in this state, the detection piece 17 cannot rotate in the ascending direction, so that the paper insertion path 3
Even if the sheet is inserted into the sheet, the sheet only abuts on the detection unit 17a, and the insertion into the back is blocked.

When the solenoid 19 is turned off, the drive pin 46 returns to the state shown in FIG. 7 again by the urging force of the spring 26, and the sheet can be inserted.

According to this embodiment, the sensor body 22 and the solenoid 1 are
Since 9 and the like are arranged outside the both side plates 41, 42, the height of the mechanism for detecting the insertion of the sheet and preventing the insertion can be reduced.

In each of the above-described embodiments, the transfer paper insertion portion and the document insertion portion have the same component configuration of the paper insertion detection portion and the portion that prevents the insertion. Therefore, only the transfer paper insertion portion side has been described in detail. Then, in the case of the document insertion portion 1 shown in FIG. 2, after the paper Pb which is the document passes from the paper insertion path 3 through the turn conveyance path 12 and the contact glass 13, it is not discharged to the outside of the apparatus and is re-fed. When the paper roller 11 is repeatedly conveyed in a loop and drawn a plurality of times, it is controlled so that the paper insertion is blocked (the solenoid 19 is turned on) until the paper ejection sensor 10 confirms the ejection of the paper Pb. .

Further, in each of the above embodiments, the detection pieces 17 are provided on the upper and lower guide plates.
Since the openings 3c and 3d are formed only in one place corresponding to the above, there is a case where the original may have a sheet to be bonded, especially when this sheet inserting section is applied to the original inserting section. The effect (breaking of ears, reduction of jam) is great.

Further, the sensor 24 is not limited to the optical type, but a mechanical type may be used.

Effects As described above, according to the present invention, it is possible to detect a sheet to be inserted and to detect a predetermined sheet without the need for a dedicated comb-shaped blocking member or the like for blocking the insertion of the sheet into the insertion path. Since the same paper insertion detector can perform the function of temporarily blocking the insertion of paper when it is inserted without the space between, it can be installed in a small space and the assembly is easy. Therefore, the cost can be reduced.

Moreover, it is possible to reliably prevent the sheet.

[Brief description of drawings]

FIG. 1 is an external perspective view showing an embodiment of a sheet inserting section according to the present invention, and FIG. 2 is a schematic configuration diagram showing an example of a manuscript moving type copying machine similarly provided with the sheet inserting section. FIG. 4 is a sectional view showing a state in which the detection pieces 17 of the paper insertion detector 4 of FIG. 1 are in different positions, and FIG. 5 is another embodiment of the paper insertion portion using a locking member as a rotating lever. FIG. 6 is a sectional view similar to FIGS. 3 and 4, and FIG. 6 shows another embodiment of the paper insertion portion in which the paper insertion detector is arranged with a distance between the detection portion and the light shielding portion. FIG. 7 is a perspective view showing an example, and FIGS. 7 to 9 are front views showing different states for explaining the operation of the embodiment shown in FIG. 1 ... original insertion part, 2 ... transfer paper insertion part 3 ... paper insertion path, 4 ... paper insertion detector 17 ... detection piece, 19 ... solenoid 21 ... locking member P, Pa, Pb ... … Paper

Claims (1)

[Scope of utility model registration request] 1. A sheet insertion section provided for manually inserting a sheet such as an original or a transfer sheet into an apparatus using a sheet such as a copying machine, and a detection piece displaced by the sheet inserted into a sheet insertion path. A sheet insertion detector is provided, and a locking member that can lock the detection piece at a position that prevents the insertion of the sheet is provided, and the detection piece is locked by this locking member to prohibit the insertion of the sheet. A paper insertion part characterized by being obtained.