JPH09315593A - Supporting device for paper feeding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize suitable pressing force for paper feeding by compensating for pressing force by a spring through a process of using magnetic force of a magnet, in a paper feeding device for feeding and conveying paper sheets while bringing a supporting member for paper feeding in press-contact with a friction member by the spring. SOLUTION: Stacked paper sheets 14 are held in the specified position, and the paper sheets 14 are supplied and conveyed while pressing them by using a friction member for paper feeding 11. A magnet 15 and a magnet 16 or a set of a magnet and a magnetic substance are provided in the position near the friction member for paper feeding 11 and the position, facing the near position of the friction member for paper feeding 11, of a supporting member of paper feeding 12 for bringing the stacked paper sheet in press-contact with the friction member for paper feeding 11. Attracting force of magnetic force generated by the magnets is generated between the friction member for paper feeding 11 and the supporting member of paper feeding 12, and a part in which pressing force (paper feeding pressure) is decreased by extension of a pressing spring 13 after the stacked paper sheets 14 are reduced is compensated by force of the magnets, and therefore, suitable pressing force (paper feeding pressure) is applied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feed supporting device in a copying machine, a printer, a printing machine, or the like.

[0002]

2. Description of the Related Art FIG. 8 is a block diagram of an essential part for explaining an example of a conventional sheet feeding supporting device (friction separating sheet feeding device). As is well known, in a copying machine, a printer, a printing machine or the like. Installs the stacked sheets 4 in a sheet feeding cassette, separates and feeds the sheets one by one by using a sheet feeding friction member 1 such as a sheet feeding roller, and performs a copying or printing process. Stacked paper 4
Is pressed against the paper feed friction member 1 by moving the paper feed support member (bottom plate) 2, and is conveyed by the frictional force generated by the pressing force. The pushing force may be given by a driving force of a motor or the like, but as shown in FIG. 8, it is often given by (the restoring force of) the pushing spring 3 for simplification of the device.

[0003]

The sheet feeding device is required to reliably feed one sheet without causing non-feeding or double feeding of sheets (sending two or more sheets in one sheet feeding). For that purpose, it is necessary to set the force for pressing the paper 4 against the paper-feeding friction member 1 within an appropriate range. The amount of compression of the pressing spring 3 is reduced because it moves upwards, and the force for pressing the paper 4 against the paper-feeding friction member 1 is small, so that the appropriate pressing force (paper-feed pressure) required for paper feeding is set. By not being able to do so, there is a problem that feed failure occurs.

In view of the above problems, the present invention has been made with the object of providing a means for compensating the pressing force of a spring and realizing an appropriate sheet pressing force by using the magnetic force of a magnet. is there.

[0005]

According to a first aspect of the present invention, in a copying machine, a printing machine, a printer or the like, a stacked paper sheet is held at a predetermined position and the paper sheet is pressed by a paper feed friction member. In the paper feeding device that supplies and conveys the paper while feeding it, it is located at a position near the paper feeding friction member and at a position near the paper feeding support member that presses the stacked paper sheets against the paper feeding friction member. A magnet and a magnet, or a combination of a magnet and a magnetic body is provided, so that a magnetic attraction force due to the magnet is generated between the paper feeding friction member and the paper feeding support member. By arranging the members, the amount of paper loaded is reduced,
By compensating for the place where the pressing force expands and the pressing force (feeding pressure) decreases, the force of the magnet is used to provide an appropriate pressing force (feeding pressure) to realize a stable feeding operation. It is the one.

According to a second aspect of the present invention, in a copying machine, a printing machine, a printer or the like, a stacked paper sheet is held at a predetermined position, and the paper sheet is fed and conveyed while being pressed by using a paper feed friction member. In the paper apparatus, the paper-feeding friction member is composed of a magnet, and the paper-feeding support member that presses the stacked paper sheets against the paper-feeding friction member is provided at a position corresponding to the paper-feeding friction member. It is characterized by having a magnet or a magnetic body. Therefore, by configuring the paper-feeding friction member with a magnet, a magnetic force for attracting the paper-feeding friction member and the paper-feeding support member is generated, and an appropriate pressing force ( Paper feeding pressure) to realize a stable paper feeding operation and to downsize the device,
Further, it is possible to detect a metal piece or the like adhering to the surface of the paper in advance and prevent foreign matter from entering the machine body.

According to a third aspect of the present invention, in a copying machine, a printing machine, a printer or the like, a stacked paper sheet is held at a predetermined position, and the paper sheet is fed and conveyed while being pressed by a paper feed friction member. In the paper apparatus, the paper-feeding friction member is made of a magnetic material, and the paper-feeding support member that presses the stacked paper sheets against the paper-feeding friction member is provided at a position corresponding to the paper-feeding friction member. Characterized by having a magnet,
The paper-feeding friction member is made of a normal magnetic material instead of a magnet so that the paper-feeding friction member itself is prevented from malfunctioning.

According to a fourth aspect of the present invention, in the sheet feeding support device according to any one of the first to third aspects, the sheet feeding support member for pressing the stacked sheets against the sheet feeding friction member is provided. The magnets or magnetic bodies, the magnets or magnetic bodies provided on the paper feeding support members are moved to the magnets or magnetic bodies as the paper feeding support members reach a position where the number of stacked sheets decreases. It is characterized in that it is provided with a mechanism for separating from a magnet or a magnetic body provided correspondingly, and thus when the paper feeding support member comes close to the paper feeding friction member, it is provided on the paper feeding support member. By appropriately separating the position of the magnetic body,
When the amount of paper is very small, the influence of the magnetic force on the pressing force (paper feeding pressure) is adjusted, and in the inventions of claims 1 to 3, when the paper is small, the magnetic force is too large, which causes a problem. This is to prevent the occurrence of.

According to a fifth aspect of the present invention, in the sheet feeding support device according to any one of the first to fourth aspects, the position of the sheet feeding support member that presses the stacked sheets against the sheet feeding friction member. The position detecting means for detecting the magnetic force is provided, and the magnet installed in the paper-feeding friction member or in the vicinity thereof is an electromagnet. Therefore, the generation of the magnetic force of the magnetic member in any one of claims 1 to 4 is performed by the electromagnet. In addition, the position detection means of the sheet feeding support member is provided so that the magnetic force of the electromagnet can be adjusted so that the pressing force (sheet feeding pressure) becomes an appropriate value.
It is possible to realize a paper feeding mechanism having higher performance with respect to double feeding and non-feeding.

According to a sixth aspect of the present invention, in a copying machine, a printing machine, a printer or the like, a stacked sheet is held at a predetermined position, and the sheet is fed while being pressed by the sheet feeding friction member,
A sheet feeding device for transporting includes a sheet feeding support member that presses stacked sheets against the sheet feeding friction member, and a support member that supports the sheet feeding support member, and faces each member. A set of magnets or magnetic bodies is provided at the position. Therefore, magnets and the like are provided at positions where the sheet feeding support member and the pressing spring support member face each other, and the direction of the magnetic pole of the magnetic member is set. In such a manner that they are attracted to each other, and when the pressing spring is contracted, an attractive force due to the magnetic force is exerted so that an excessive spring force can be reduced. That is, it is possible to provide an appropriate pressing force (feeding pressure) by preventing the pressing force from becoming too large when there is a lot of paper, in order to secure a sufficient pressing force that does not feed even when the amount of paper is small. Is.

According to a seventh aspect of the present invention, in a copying machine, a printing machine, a printer, or the like, a stacked sheet is held at a predetermined position, and the sheet is fed and conveyed while being pressed by a friction member for sheet feeding. In the paper apparatus, a linear motor is used for the pressing mechanism of the paper feeding support member that presses the stacked paper sheets against the paper feeding friction member. A linear motor for moving the paper feeding support member is provided between the support and the support to reduce the size of the entire apparatus.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

(Invention of Claim 1) FIG. 1 is a schematic configuration diagram of an essential part for explaining an embodiment of the invention described in claim 1.
A magnetic member 15 is provided in the vicinity of the paper feed friction member 11, and a magnetic member 16 is provided on the paper feed support member 12 for pressing the paper 14 against the paper feed friction member 11. The reference numerals 15 and 16 are provided at opposite positions and have magnetic poles that attract each other. The magnetic member 15 is preferably attached to the same member as the mounting member (not shown) of the paper feeding friction member 11, but the force generated in the magnetic member 15 is transmitted to the paper feeding friction member 11. Any structure will do. For example, if the magnetic member 15 has a north pole on the downward surface, the upward surface of the magnetic member 16 is S.
To be a pole. Alternatively, since the magnetic members may attract each other, if the other is a magnet, the other may be a magnetic body such as iron. When the magnetic member 16 is made of a magnetic material instead of a magnet, the paper feeding support member 12 may be made of a magnetic material so that the magnetic member 16 is not provided.

When the paper 14 is pressed against the paper-feeding friction member 11 and the paper 14 is conveyed by the frictional force generated at the contact point, the pressing force becomes smaller when the number of papers 14 decreases. When the amount of the paper 14 is reduced, a suction force acts between the magnetic members 15 and 16 to compensate for the reduced pressing force. The attractive force between the magnetic members 15 and 16 is always working, but the magnetic force changes extremely greatly with distance (the force increases rapidly from a certain distance), so when there are many sheets, the force of the pressing spring is used. Very small compared to. Like above-mentioned,
If an attempt is made by the pressing spring to secure a sufficient pressing force that does not cause the paper to be fed even when the number of sheets 14 is small, when the number of sheets 14 is large, the pressing force may become too large, causing a problem of double feeding. However, according to the present invention, by using the magnetic force, it is possible to compensate for the shortage of the pressing force when the paper 14 is small, which is usually a problem, and to provide an appropriate pressing force (paper feeding pressure).

(Invention of Claim 2) FIG. 2 is a schematic configuration diagram of a main part for explaining an embodiment of the invention described in Claim 2.
In the present invention, the paper-feeding friction member 21 is composed of a magnet 25, and the central metal member is the magnet 25, and rubber 26 or the like is attached around the magnet 25. A magnetic member 27 is provided at a position of the sheet feeding support member 22 for pressing the sheet 24 against the sheet feeding friction member 21 so as to face the sheet feeding friction member 21. The magnetic member 27 is a magnet provided with a paper-feeding friction member 21 (magnet 25) and magnetic poles that attract each other.
Alternatively, the magnetic member 27 may be made of a magnetic material such as iron instead of a magnet because it may be attracted. When the magnetic member 27 is made of a magnetic material instead of a magnet, it is not necessary to provide the magnetic member 27 by making the paper feeding support member 22 a magnetic material.

As in the case of the first aspect of the present invention, when the number of sheets 24 is reduced, the attraction force between the magnetic members 25 and 27 acts to compensate for the reduced pressing force of the pressing springs 23, but for feeding paper. By using a magnet for the friction member 21, the entire apparatus can be downsized, and further, a metal piece or the like attached to the surface of the paper 24 can be detected in advance, so that foreign matter may enter the machine body. You can prevent it from breaking down.

(Invention of Claim 3) FIG. 3 is a schematic view of the essential part for explaining an embodiment of the invention described in claim 3.
In the present invention, the paper-feeding friction member 31 is replaced by a magnetic material 3 such as iron.
5, the metal member at the center of the friction member 31 is the magnetic body 35, and the rubber or the like 36 is attached around the magnetic body 35. A magnet 37 is provided at a position facing the friction member 31 of the paper feeding support member 32 for pressing the paper 34 against the paper feeding friction member 31. The magnet 37 is a magnet having a paper-feeding friction member 31 (magnetic member 35) and magnetic poles attracting each other. As in the case of the first aspect of the invention, when the amount of the paper 34 is reduced, an attractive force acts between the magnetic member 25 and the magnet 27 to compensate for the reduced pressing force of the pressing spring 33. By eliminating the friction member 31 from a magnet, it is possible to prevent the sheet feeding friction member 31 from adsorbing a metal piece or the like and causing the apparatus to malfunction.

(Invention of Claim 4) FIG. 4 is a schematic view of the essential parts for explaining the embodiment of the invention described in claim 4.
In this invention, as shown in FIG. 4 (A), the paper-feeding friction member 41 is composed of a magnetic material 45 such as iron, and the central metal member is the magnetic member 45, and rubber or the like is provided around it. 46
Is attached. Friction member 4 for feeding paper 44
A magnetic member 47 is provided on the pressing spring 43 for pressing the sheet 1 at a position facing the paper feeding friction member 41. The magnetic member 47 is the paper-feeding friction member 41 (magnetic member 45).
And a magnet having magnetic poles that attract each other. Alternatively, since it suffices to suck, if one side is a magnet, the other side may be a magnetic body such as iron instead of a magnet, and the sheet feeding support member 42 is made a non-magnetic body.

When the paper-feeding operation is repeated and the stacking amount of the paper 44 is reduced, an attractive force acts between the magnetic members 45 and 47 to compensate for the reduced pressing force of the pressing spring 53. As in the above-described embodiment, as described above, the magnetic force is greatly influenced by the distance (the force rapidly increases from a certain distance). Therefore, when the number of sheets of paper 44 becomes very small, the magnetic force works too much. It may happen. In this case, the pressing force (paper feeding pressure) becomes too large, which may cause double feeding.

Therefore, by installing the magnetic member 47 in the middle of the pressing spring 43, the magnetic material 47 can be used when there are many sheets.
Is near the paper feeding support member 42 (position 47a shown by the chain line in FIG. 4B), and when there is little paper (pressing spring 4
3 is extended), the magnetic material 47 moves to the sheet feeding support member 4
2 (position 47b shown by the solid line in FIG. 4B). That is, in FIG. 4B, when the pressing spring 43 extends, the magnetic body 47 provided on the spring 43 is pulled from the position 47b to the position 47a. Therefore, the distance from the sheet feeding support member 42, and hence the distance from the friction member (not shown in FIG. 4B), increases, so that the magnetic force decreases. As a result, it is possible to prevent a problem from occurring due to too large a magnetic force when the paper runs out.

The method of moving the magnetic member 47 away from the paper feed support member 42 as the paper feed support member 42 is raised is not limited to the above, and a support member (not shown) separately provided outside may be used. A mechanism for adjusting the position of the magnetic member 47 may be provided when the sheet feeding support member 42 approaches the rising limit. This can be easily realized by utilizing a projection or the like partially held by an external supporting member (not shown).

(Invention of Claim 5) FIG. 5 is a schematic configuration diagram of a main part for explaining an embodiment of the invention described in claim 5.
According to the present invention, the paper-feeding friction member 51 is constituted by the magnetic body 55 as in claims 1 to 4, the central metal member is the magnetic member 55, and the rubber 56 or the like is provided around the magnetic member 55. It is stuck. Friction member 51 for feeding paper 54
A magnetic member 57 is provided at a position facing the friction member 51 of the sheet feeding support member 52 for pressing against the sheet, or instead of the friction member 51 (magnetic member 55), a magnetic member 58 is provided in the vicinity thereof. May be used together.

These magnetic members are appropriately composed of electromagnets. When the magnetic member 57 is an electromagnet, the magnetic member 55
(Or the magnetic member 58) may be made of an ordinary magnetic material. When the magnetic member 55 (or the magnetic member 58) is composed of an electromagnet, the magnetic member 57 may be composed of an ordinary magnetic material. In any case, the paper feeding support member 52 is
It is desirable to use a non-magnetic material. Needless to say, the magnetic poles of the magnetic members are oriented so that the paper-feeding friction member 51 and the paper-feeding support member 52 attract each other. Since the operation is the same as the above, the details are omitted.

The present invention is characterized in that the magnetic force of these magnetic members is generated by an electromagnet. By providing a means (not shown) for detecting the position of the sheet feeding support member 52, the pressing force is provided. The magnetic force of the electromagnet can be adjusted so that the (paper feed pressure) becomes an appropriate value, and a paper feed mechanism with higher performance can be realized against double feeding and non-feeding.

(Invention of Claim 6) FIG. 6 is a schematic configuration diagram of a main part for explaining an embodiment of the invention described in claim 6,
According to the present invention, a magnetic member 65 is provided on the paper feeding support member 62 for pressing the paper 64 against the friction member 61, and a magnetic material 66 is provided on the magnetic member 65 of the support 67 of the pressing spring 63. It is provided at the opposite position. The magnetic poles of the magnetic member are oriented so as to attract each other. For example, if the magnetic member 65 has an N pole on the downward surface, the magnetic member 66
The surface facing upward is the S pole. Alternatively, it may be reversed. When a large amount of sheets 64 are stacked on the sheet feeding support member 62, the pressing spring 63 is greatly contracted and the length is shortened.
The pressing spring 63 tries to secure a sufficient pressing force (paper feeding pressure) even when it is elongated (when the number of sheets of paper 64 is small). ), Which may cause double feeding as a sheet feeding characteristic.

According to the present invention, the magnetic members 65 and 66 are
Since they are installed so as to attract each other, the pressing spring 63
When is contracted, an attractive force due to the magnetic force works, so that an excessive spring force can be reduced. The attraction force between the magnetic members 65 and 66 is always working, but the magnetic force acts on the distance very much (the force suddenly increases from a certain distance). Therefore, when the paper becomes small, the pressing spring is used. Very small compared to force. Even if the number of sheets of paper 64 is small, if an attempt is made to secure a sufficient pressing force that does not cause feeding, if the number of sheets of paper 64 is large, the pressing force becomes too large. Pressure) can be provided.

(Invention of Claim 7) FIG. 7 is a schematic configuration diagram of a main part for explaining an embodiment of the invention described in claim 7.
According to the present invention, one end of the paper feed supporting member 72 and its supporting member 7 are provided.
7 is provided with a linear motor 78, and the driving force of the linear motor 78 allows the sheet feeding support member 72 to move. The pressing spring as described above may be provided as an auxiliary (not shown). In addition, by using a position detecting unit and a control unit (not shown), the sheet feeding support member 72
Position / force control of the paper, and the paper 74 and the paper feed friction member 71.
Adjust the pressing force (feeding pressure) with and. With this configuration,
Since it is possible to reduce the size of the entire device and, in addition, it is possible to basically make it non-contact as compared with the drive using a combination of normal motor gears, by appropriately controlling the magnetic force of the linear motor 78. The operation of the apparatus can be smoothly performed without applying a mechanical impact force to the paper-feeding friction member 71.

[0027]

According to the invention of claim 1, in a copying machine, a printing machine, a printer or the like, the stacked sheets are held at a predetermined position,
In a paper feeding device that feeds and conveys the paper while pressing the paper using a paper feeding friction member, a position near the paper feeding friction member and a paper feeding device that presses the stacked paper against the paper feeding friction member. A magnet and a magnet or a combination of a magnet and a magnetic material is provided at a position corresponding to the vicinity of the paper support member, and a magnetic attraction force due to the magnet is provided between the friction member and the paper feed support member. Since a member for generating is arranged, the place where the stacked sheets are reduced and the pressing spring extends to reduce the pressing force (paper feeding pressure) can be compensated by the magnetic force.
Proper pressing force (paper feeding pressure) can be provided, and stable paper feeding operation can be realized.

According to a second aspect of the present invention, in a copying machine, a printing machine, a printer, or the like, a stacked sheet is held at a predetermined position, and the sheet is fed and conveyed while being pressed by a friction member for sheet feeding. In the paper apparatus, the paper-feeding friction member is composed of a magnet, and the paper-feeding support member that presses the stacked paper sheets against the paper-feeding friction member is provided at a position corresponding to the paper-feeding friction member. Since it has a magnet or a magnetic body, by constructing the paper-feeding friction member with a magnet, a magnetic force for attracting the paper-feeding friction member and the paper-feeding support member can be generated, and an appropriate pressing force (feeding force) can be generated. (Paper pressure) can be provided, stable paper feeding operation can be realized, and the device can be downsized,
Further, since metal pieces and the like attached to the surface of the paper can be detected in advance, it is possible to prevent foreign matter from entering the machine body.

According to a third aspect of the present invention, in a copying machine, a printing machine, a printer or the like, a stacked paper sheet is held at a predetermined position, and the paper sheet is fed and conveyed while being pressed by a paper feed friction member. In the paper apparatus, the paper-feeding friction member is made of a magnetic material, and the paper-feeding support member that presses the stacked paper sheets against the paper-feeding friction member is provided at a position corresponding to the paper-feeding friction member. Since it has a magnet, it is possible to prevent the friction member itself from being defective by forming the paper-feeding friction member from a normal magnetic body instead of a magnet.

According to a fourth aspect of the present invention, in the sheet feeding support device according to any one of the first to third aspects, the sheet feeding support member for pressing the stacked sheets against the sheet feeding friction member is provided. The magnets or magnetic bodies, the magnets or magnetic bodies provided on the paper feeding support members are moved to the magnets or magnetic bodies as the paper feeding support members reach a position where the number of stacked sheets decreases. Since a mechanism for separating from the corresponding magnet or magnetic material is provided, when the paper feeding support member comes close to the friction member, the magnetic material provided on the paper feeding support member should be appropriately separated. It is possible to adjust the influence of the magnetic force on the pressing force (feeding pressure) when the paper is very small. Therefore, in claim 1 to claim 3, when the paper is small, the magnetic force is large. It is possible to prevent problems caused by passing too much.

According to a fifth aspect of the present invention, in the sheet feeding support device according to any one of the first to fourth aspects, the position of the sheet feeding support member that presses the stacked sheets against the sheet feeding friction member. Since a magnet installed in the position detecting means for detecting the sheet feeding friction member or in the vicinity thereof is an electromagnet,
The electromagnet is used to generate the magnetic force of the magnetic member according to any one of claims 1 to 4, and the position detecting means of the sheet feeding support member is provided, so that the pressing force (sheet feeding pressure) becomes an appropriate value. The magnetic force of can be adjusted, and a paper feed mechanism with higher performance can be realized for double feeding and non-feeding.

According to a sixth aspect of the present invention, in a copying machine, a printing machine, a printer or the like, a stacked sheet is held at a predetermined position, and the sheet is fed while being pressed by the sheet feeding friction member,
A sheet feeding device for transporting includes a sheet feeding support member that presses stacked sheets against the sheet feeding friction member, and a support member that supports the sheet feeding support member, and faces each member. Since a set of magnets or magnetic materials is provided at the position, magnets or the like are provided at the facing positions on the sheet feeding support member and the pressing spring support body, and the magnetic poles of the magnetic members are attracted to each other. Since it is oriented so that when a large amount of paper is loaded, the pressing spring contracts greatly, but be sure to secure a sufficient pressing force (paper feeding pressure) even when it extends long (when the number of papers decreases). In that case, when contracted for a short time, a large pressing force (paper feeding pressure) is generated, which may cause double feeding as a paper feeding characteristic. However, according to the present invention, the magnetic members are installed so as to attract each other. Therefore, if the pressing spring contracts, Suction force acts that can reduce the excessive spring force. That is, if an attempt is made to secure a sufficient pressing force that does not cause feeding even when the amount of paper is small, the pressing force becomes too large when the amount of paper is large, but according to the present invention, it is possible to prevent such an excessive pressing force. It is possible to provide an appropriate pressing force (feeding pressure).

According to a seventh aspect of the present invention, in a copying machine, a printing machine, a printer, or the like, a stacked sheet is held at a predetermined position, and the sheet is fed and conveyed while being pressed by using a friction member for sheet feeding. In a paper apparatus, a linear motor is used as a pressing mechanism of a paper feeding support member that presses stacked paper sheets against the paper feeding friction member, and a linear motor is used between one end of the paper feeding support member and its support. Since the linear motor is provided, and the driving force of the linear motor is used to move the paper feeding support member,
In addition to the miniaturization of the entire device, since the device is not driven in a mechanical contact state such as a gear, there is no mechanical impact force on the friction member and the device can be operated smoothly.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a main part for explaining an embodiment of the invention described in claim 1.

FIG. 2 is a schematic configuration diagram of a main part for explaining an embodiment of the invention described in claim 2.

FIG. 3 is a schematic configuration diagram of a main part for explaining an embodiment of the invention described in claim 3.

FIG. 4 is a schematic configuration diagram of a main part for explaining an embodiment of the invention described in claim 4.

FIG. 5 is a schematic configuration diagram of a main part for explaining an embodiment of the invention described in claim 5.

FIG. 6 is a schematic configuration diagram of a main part for explaining an embodiment of the invention described in claim 6;

FIG. 7 is a schematic configuration diagram of a main part for explaining an embodiment of the invention described in claim 7;

FIG. 8 Conventional Paper Feed Support Device (Friction Separation Paper Feed Device)
It is a principal part schematic block diagram for demonstrating an example of.

[Explanation of symbols]

1, 11, 21, 31, 41, 51, 61, 71 ... Paper feeding friction member, 2, 12, 22, 32, 42, 52, 6
2, 72 ... Feeding support members, 3, 13, 23, 33, 4
3, 53, 63 ... Spring for pressing, 4, 14, 24, 34,
44, 54, 64, 74 ... Paper, 15, 16 ... Magnetic member, 25 ... Magnet, 27 ... Magnetic member, 35 ... Magnetic body, 37
… Magnets, 45, 47, 55, 57, 58, 65, 66…
Magnetic body, 67, 77 ... Support body, 78 ... Linear motor.

Claims (7)

[Claims] 1. A sheet feeding device for holding a stacked sheet at a predetermined position in a copying machine, a printing machine, a printer, etc., and feeding and conveying the sheet while pressing the sheet with a friction member for sheet feeding. A magnet and a magnet, or a position near the sheet feeding friction member and a position corresponding to the sheet feeding support member that presses the stacked sheets against the sheet feeding friction member.
A sheet feeding support device, which is provided with a set of a magnet and a magnetic body. 2. A sheet feeding device for holding a stacked sheet at a predetermined position in a copying machine, a printing machine, a printer, etc., and feeding and conveying the sheet while pressing the sheet with a sheet feeding friction member, The paper-feeding friction member is composed of a magnet, and a magnet or magnetic body is provided at a position corresponding to the paper-feeding friction member of the paper-feeding support member that presses the stacked sheets against the paper-feeding friction member. A supporting device for paper feeding, characterized by having. 3. A paper feeding apparatus for holding a stacked paper sheet at a predetermined position in a copying machine, a printing machine, a printer, etc., and feeding and carrying the paper sheet while pressing the paper sheet with a friction member for paper feeding. The paper-feeding friction member is made of a magnetic material, and a magnet is provided at a position corresponding to the paper-feeding friction member of the paper-feeding support member that presses the stacked paper sheets against the paper-feeding friction member. Characteristic paper feeding support device. 4. The sheet feeding support device according to claim 1, wherein a magnet or a magnetic body provided on a sheet feeding support member that presses the stacked sheets against the sheet feeding friction member. However, as the sheet feeding support member reaches a position where the number of stacked sheets decreases, a magnet or a magnetic body provided on the sheet feeding support member is provided corresponding to the magnet or the magnetic body. A supporting device for feeding a sheet, which is provided with a mechanism for separating from a magnet or a magnetic body. 5. The sheet feeding support device according to claim 1, wherein the position detection is performed to detect the position of the sheet feeding support member that presses the stacked sheets against the sheet feeding friction member. A sheet feeding support device, which is provided with a means, and wherein the sheet feeding friction member or a magnet installed in the vicinity thereof is an electromagnet. 6. A sheet feeding device for holding a stacked sheet at a predetermined position in a copying machine, a printing machine, a printer, etc., and feeding and conveying the sheet while pressing the sheet with the sheet feeding friction member, A sheet feeding support member that presses the stacked sheets against the sheet feeding friction member, and a support member that supports the sheet feeding support member, and a magnet or a magnetic material is provided at a position facing each member. A support device for paper feeding, characterized in that a set of 7. A paper feeding device for holding a stacked paper sheet at a predetermined position in a copying machine, a printing machine, a printer, etc., and feeding and carrying the paper while pressing the paper sheet with a friction member for paper feeding. A sheet feeding support device, wherein a linear motor is used as a pushing mechanism of a sheet feeding support member that pushes the formed sheet against the sheet feeding friction member.