JP3066185U - Paper feeder - Google Patents

Abstract

(57) [Abstract] [Purpose] If the setting of the contact pressure of the paper feed roller with respect to the paper is incorrect due to the wear of the paper feed roller or the friction plate, the error can be quickly corrected by a simple adjustment work. To do. A pressure adjusting means for swinging a friction plate in a vertical direction is provided in a sheet feeding device for feeding out sheets stacked on a sheet supply shelf through a paper feed roller and a friction plate. Provide. The pressure adjusting means is a shaft that is rotated in the axial direction via a rotating shaft 43 that rotates by operating the dial 13 and a driven gear 49 that meshes with a driving gear 45 provided on the rotating shaft. It comprises a driving shaft 44. The rotating shaft 43 is urged by a spring 54 toward a position where the driving gear 45 meshes with the driven gear 49. Only the rotating shaft 43 is allowed to idle while the 44 is kept stationary. And
When the feed roller 5 and the friction plate 41 are worn, the dial 1
3 can be easily corrected by the idling of the rotating shaft 43.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a paper feeder that feeds out stacked sheets one by one, and more particularly to a paper feeder applied to a collating machine for collating multiple sheets of paper such as a newspaper advertisement. The present invention relates to a paper feeding device capable of properly feeding out sheets to be fed one by one at a set pressure.

[0002]

[Prior art]

 In general, various collating machines have been used as a means for collating several types of paper, such as newspaper advertisements (flyers). Most of the paper feeders have a multi-stage paper feeder, and sheets fed from each paper feeder are passed through a group of rollers connected in parallel and overlapped. Here, each paper feeder is composed of a paper feed shelf for loading paper by type, a friction plate provided downstream of the paper feed tray, and a paper feed roller that feeds out the paper on the paper feed shelf one by one in cooperation with the friction plate. Is done.

[0003] In particular, such a paper feeding apparatus is generally provided with a pressure adjusting means capable of changing the contact pressure of a paper feeding roller depending on the thickness and properties of the paper. As disclosed in Japanese Patent Application Laid-Open No. 4-371425, the pressure adjusting means has a continuous motion system operated by operating a dial, and is configured so that the friction plate can be moved up and down by the operation of the system. You. According to such pressure adjusting means, the height of the friction plate changes according to the amount of operation of the dial, and the contact pressure of the paper feed roller with respect to the paper can be adjusted. Various papers can be fed smoothly and properly under the optimal pressure of the paper feed roller without being excessively wrinkled or not fed out due to insufficient pressure.

[0004]

[Problems to be solved by the invention]

 However, according to the conventional paper feeder, when the paper feed roller and the friction plate are worn, there is a drawback that it is very difficult to set the pressure on the paper. In other words, the setting of the contact pressure of the paper feed roller against the paper is based on the thickness and properties (surface roughness) of the paper, and the dial is adjusted to a predetermined scale. As a result, the scale will be shifted accordingly, and the dial will lose its function.

[0005] As a result, even if the dial is set to an optimum value by operating the dial, the contact pressure of the paper feed roller with respect to the paper does not become as set, which causes a paper feeding failure.

[0006] For this reason, conventionally, when the scale error becomes large, the apparatus is dismantled to reset the reference, or the paper feed roller and the friction plate are replaced at an early stage. These types of operations are cumbersome and time-consuming, and reduce equipment availability.

The present invention has been made in view of the above circumstances, and its main purpose is to set a contact pressure of a paper feed roller with respect to a sheet due to abrasion of a paper feed roller or a friction plate. In the event of an error, the error should be able to be corrected quickly with simple adjustments.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a paper feed shelf for stacking paper, a friction plate which can be swung up and down on the downstream side of the paper feed shelf, and a friction plate disposed above the friction plate. A paper feed roller for feeding out the paper on the paper feed shelf one by one through the friction plate, and adjusting the contact pressure of the paper feed roller with the paper passing over the friction plate. In the sheet feeding device made adjustable by the means, the pressure adjusting means is moved in the axial direction through a driven gear that meshes with a driving gear, and a linear motion shaft that swings the friction plate in the vertical direction while moving the driving gear. And a rotating shaft that is connected to one end and rotates by operating a dial.The rotating shaft has a fixed position at a position where the driving gear meshes with the driven gear, and has a connecting point with the dial as a fulcrum. The drive gear is swingably mounted so as to be separated from the driven gear. When the driving gear is separated from the driven gear against the resilience of the spring, the linear shaft is kept stationary and the rotary shaft is operated by the operation of the dial. It is intended to provide a sheet feeding device characterized in that it can be idled only.

[0009]

[Embodiment of the invention]

 Hereinafter, application examples of the present invention will be described in detail with reference to the drawings. First, FIG. 1 is a schematic side view of a collating machine provided with a paper feeding device according to the present invention. In the figure, reference numeral 1 denotes a casing which forms the exterior of the collating machine. On one or both sides (only one side is shown in the figure) of the casing 1, a plurality of paper feeders 2A, 2B,. Device.

Each of the paper feeders 2A, 2B,... Includes a paper feed shelf 3 for stacking paper P such as newspaper advertisements by type, a unit table 4 provided downstream of the paper feed shelf, and A unit provided with a gear-shaped paper feed roller 5 made of silicon or other rubber provided above the unit table, and provided with paper P stacked on the paper feed shelf 3 at a downstream side thereof. The paper can be fed one by one through the space between the table 4 (particularly, a friction plate described later provided on the unit table) and the paper feed roller 5.

Each of the paper feed shelves 3 can swing vertically with its downstream end as a fulcrum. In particular, in the lowermost sheet feeding device 2A, the sheet feeding shelf 3 is held at a fixed angle during use by being supported on both sides of the middle portion by the arm members 6, and is folded upward when not in use. As shown by the imaginary line, the overhang from the housing 1 can be reduced. The arm 6 has a guide groove 7 formed along its longitudinal direction, one end of which is pivotally attached to the paper feed shelf 3, and the guide groove 7 is engaged with a pin 8 fixed to the housing 1. Are combined. The guide groove 7 is formed as a locking portion 7A whose one end bends in a hook shape. When the locking portion 7A and the pin 8 are engaged with each other, the paper feed shelf 3 is folded upward. It can be kept as it is.

Each of the sheet feeding shelves 3 of the other sheet feeding devices 2 B, 2 C, 2 D,... Locks a portion projecting from both side surfaces thereof to a support plate 9 fixed to the housing 1. By doing so, the inclination can be switched stepwise by one-touch operation with one hand according to the properties and remaining amount of paper.

Further, each of the paper feeders 2A, 2B,... Is provided with a pressure adjusting means capable of adjusting the contact pressure of the paper feed roller 5 with the paper according to the thickness and properties of the paper. Needle arm 10 for holding the paper stacked on paper shelf 3, auxiliary roller 11 provided on the downstream side of paper supply shelf 3, and subsequent paper while sandwiching paper passing between unit base 4 and paper supply roller 5 There is provided a pair of feed rollers 12 to be transferred to the side.

The pressure adjusting means includes a dial 13 rotatably mounted on the housing 1 serving as an operation unit, and a friction plate, which will be described later, provided on the unit base 4 can be moved up and down by the operation. According to this, it is possible to smoothly feed out various papers while applying the optimum contact pressure by the paper feed roller 5.

On the other hand, a plurality of roller groups 14 are connected to the housing 1 in the vertical direction on the downstream side of each of the paper feeders 2A, 2B,. The feeders 15 are provided vertically close to each other. A guide plate 16 for winding up a side edge of a bundle of sheets passing between the pair of feeders 15 (paper exit) is provided at a front end side (paper exit) of the pair of feeders 15, and a bundle of collated sheets is bundled. And a paper discharge receiver 17 for sequentially stacking the sheets one by one.

According to the collating apparatus configured as described above, for example, a plurality of newspaper advertisements (flyers) are stacked as sheets on the sheet feeding shelf 3 of each sheet feeding device, and each sheet is fed. The sheets supplied from the apparatus can be stacked one by one while passing through the roller group 14 to form a bundle as shown in FIG. In FIG. 2, the outer sheet P1 is supplied from the lowermost sheet feeding device 2A, and the sheet P1 is folded in a collating machine so that another sheet P2 can be bundled.

By the way, when the sheets bundled as shown in FIG. 2 are stacked on the sheet discharge tray 17 through the space between the feeders 15, the portion indicated by the imaginary line in FIG. 2 is separated as shown in FIG. However, the portion may be broken at the time of landing. The guide plate 16 shown in FIG. 1 is for preventing this, and will be described in detail with reference to FIGS. 4 and 5. This guide plate 16 forms a slope 16A by bending a metal plate or the like. One end is fixed to the housing 1 via the mounting plate 18 so as to be adjustable in height. According to the guide plate 16, when the bundle of sheets P is discharged from between the feeders 15, as shown in FIG. 5, the side edges thereof can be turned up while making contact with the slope 16A. For this reason, as a result of the bundle of sheets P jumping out toward the paper receiving tray 17 with its side edge being rolled up, a lift acts on the side edge as shown in FIG. . The bundle of sheets P lands on the sheet receiving tray 17 while being kept in that state, so that the sheets P can be stacked without breaking the side edge.

Next, the structure of each part of the sheet feeding device according to the present invention will be described. First, the paper feed shelf will be described with reference to FIGS. 7 and 8. The paper feed shelf 3 has a rectangular base 19, a seat plate 20 A mounted at the center thereof, and a slide provided on the base with the seat plate interposed therebetween. It is composed of a pair of paper guides 20B movably attached. At one end of each side edge of the base 19, a pivot 21 to be attached to the housing 1 is protruded. In particular, a long hole 22 as shown Is formed. As is apparent from FIG. 8, both ends of the operation shaft 23 project from the long hole 22, and the operation shaft 23 is urged by the spring 24 toward one end side (the pivot side) of the long hole 22. . The paper supply shelf 3 is swingably attached to the housing 1 with the pivot 21 as a fulcrum. When paper is loaded on the base 19, the interval between the paper guides 20B is adjusted according to the size of the paper. The seat plate 20A can be slid in a direction orthogonal to the base 19. The angle of the paper feed shelf 3 can be changed depending on the number and properties of the sheets to be loaded. At this time, a fixed angle is obtained by engaging both ends of the operation shaft 23 with the support plate 9 fixed to the housing 1. Can be kept.

FIG. 9 is a side view showing the support plate. As is clear from this figure, the support plate 9 is a plate member having three stepped portions 25A, 25B, 25C having different heights formed on one side thereof. Fixed relative to. The paper feed shelf 3 is maintained at a predetermined angle by engaging both ends of the operation shaft 23 with the steps 25A to 25C of the support plate 9.

FIG. 10 is a schematic side view showing this state. Here, in order to change the angle of the paper feed shelf 3, the operation shaft 23 is pulled toward the user against the elasticity of the spring 24 shown in FIG. 8, and the paper feed shelf 3 is rocked as it is, and The operation shaft 23 is returned at a predetermined position, and both ends are locked to another step. Note that the above operation is sufficient only when the angle of the paper feed shelf 3 is lowered, and when the angle is raised, the steps 25A to 25C are formed along the trajectory of the operation shaft 23. Only by swinging the paper shelf 3 upward, both ends of the operation shaft 23 can be sequentially locked to the steps 25A to 25C. By the way, the figure shows a state in which three steps 25A to 25C are formed on the support plate 9 so that the angle of the paper feed shelf 3 can be switched in three steps, but the number of steps is increased. Thus, the angle of the paper feed shelf can be set more finely.

Next, a description will be given of the needle arm 10 for holding down the sheets stacked on the sheet supply shelf. As shown in FIG. 11, the needle arm 10 has a cylindrical mounting portion 27 at one end thereof, and the mounting portion 27 can be swung about the fulcrum by connecting the mounting portion 27 coaxially with the paper feed roller 5. Equipment. In particular, the needle arm 10 is provided with a weight 28 and a hook 29. The weight 28 is slidably provided along the needle arm 10 and can be fixed at a required position by a tightening screw 30 provided on a side surface thereof.

A needle 31 is attached to the weight 28. The staples 31 are used to pierce one edge of the upper layer of the paper stacked on the paper feed shelf 3 and stop the lower layer paper from being simultaneously fed when the uppermost layer is fed. That is, when the paper is fed one by one by the auxiliary roller 11 and the paper feed roller 5, the staples 31 function to assist the paper to be surely separated one by one. Note that a very small rip exists in the center of one side of a newspaper advertisement or the like, and the rip is caused by the needle 31.

On the other hand, the hook 29 is shaped like a laundry pinch. That is, as shown in FIGS. 12 and 13, the hook 29 connects the pair of movable plates 32 to each other so as to be swingable by the connection shaft 33, and the torsion coil spring 34 provided on the outer periphery of the connection shaft 33 provides one end of the movable plate 32. Butt against each other. In particular, one end of the movable plate 32 on the open side is a knob 35, and a hook 36 is formed on the knob 35.

The hook 29 as described above is removably sandwiched between the free end side of the needle arm 10, and is supplied from above the paper feed shelf 3 when replenishing paper to a predetermined paper feed shelf 3. This is useful for retracting the needle arm 10. In other words, if the needle arm 10 is still lying on the paper feed shelf 3, the user can raise the needle arm 10 with one hand and replenish the paper with the other hand, or the work can be performed by two people. I have to do it. Therefore, in such a case, as shown in FIG. 11, the needle arm 10 is suspended by locking the hook 36 of the hook 29 to the lower end edge of the upper paper feed shelf 3, and in this state, The paper is supplied to the paper feed shelf. When the replenishment of the paper is completed, the hook 29 is removed from the upper paper feed shelf 3 and the needle arm 10 is lowered onto the replenishing shelf below the paper supply tray. It will pierce one edge and hold it down. FIG. 1 shows a state where the needle arm 10 is lowered on the paper feed shelf 3 and a state where the needle arm 10 is suspended on the paper feed shelf 3 in the upper stage.

Next, FIG. 14 shows a cross section of the unit base. As shown in this figure, the unit base 4 includes a base frame 37 formed of a metal plate or the like, a swing base 39 having one end connected to the base frame by a connecting pin 38, and a coaxial with the swing base. It comprises a swingable sliding plate 40 attached and a friction plate 41 fixed on the upper surface of the swinging table 39. The sliding plate 40 covers the upstream side of the friction plate 41 and guides the paper fed from the paper feed shelf 3 by the auxiliary roller 11 between the friction plate 41 and the paper feed roller 5. Further, the swing table 39 can swing up and down with the connecting pin 38 as a fulcrum. Therefore, the friction plate 41 fixed on the upper surface thereof can swing up and down with the fulcrum as the swing table 39. You. The friction plate 41 is made of a member having a high gripping property such as rubber, and when the paper is fed by the paper feed roller 5 provided thereon, the lower layer paper is stopped so that several sheets are not fed at the same time. It functions to change the contact pressure of the paper feed roller 5 applied to the fed paper. That is, the contact pressure can be changed by the height of the friction plate 41. A cam 42 is attached to the lower surface of the swing table 39 so that the height can be adjusted, and the friction plate 41 can be vertically swung by the pressure adjusting means using the cam as a follower.

As shown in FIG. 15, the pressure adjusting means is generally composed of a rotating shaft 43 and a linear motion shaft 44 which are orthogonal to each other. Among these, the driving gear 45 (pinion) is fixed to one end of the rotating shaft 43, and the dial 13 is connected to one end on the opposite side. The connecting portion 46 between the rotating shaft 43 and the dial 13 is formed of, for example, a universal joint. Therefore, the rotating shaft 43 can swing about the connecting portion 46 as a fulcrum. The rotating shaft 43 has a fixed end at the one end thereof by rotatably attaching the dial 13 to the housing 1, while the other end on which the driving gear 45 is mounted is a free end and a long hole 48 of a bracket 47. Passed through. The bracket 47 is a metal fitting to be fixed to the housing 1. The bracket 47 holds a driven gear 49 (rack) which meshes with the driving gear 45, in addition to a long hole 48 through which the rotary shaft 43 passes, so as to be slidable in its longitudinal direction. A through hole 50 is formed. On the other hand, a driven gear 49 such as a rack is fixed to one end of the linear motion shaft 44, and a slide plate 51 facing the cam 42 is connected to the other end. A round hole 52 is formed in the slide plate 51, and a steel ball 53 is rollably accommodated in the round hole 52.

Here, the rotating shaft 43 is urged toward one end side (upward) of the long hole 48 by a spring 54 attached to a bracket 47 so that a driving gear 45 fixed to one end of the rotating shaft 43 meshes with a driven gear 49. The driving gear 45 is separated from the driven gear 49 when the rotating shaft 43 is swung toward the other end of the elongated hole 48 against the elasticity of the spring 54.

That is, the rotation shaft 43 is set to a fixed position where the driving gear 45 meshes with the driven gear 49, and swings so that the driving gear 45 is separated from the driven gear 49 about the connecting portion 46 with the dial 13 as a fulcrum. The driving gear 45 is held in a fixed position by a spring 54 in normal times so that the driving gear 45 meshes with the driven gear 49. In this embodiment, a torsion coil spring is used as the spring 54, and by pushing down one end 54A of the spring 54, the rotating shaft 43 swings so that the engagement between the driving gear 45 and the driven gear 49 is cut off. The free end side of the shaft 43 may be urged toward the driven gear 49 using a tension spring or a compression spring. Further, in the present embodiment, the driven gear 49 and the driving gear 45 are constituted by rack and pinions. However, the driven gear 49 and the driving gear 45 may be a normal gear device such as a spur gear that meshes with each other. In particular, in such a configuration, the gear forming the driven gear 49 is mounted on, for example, a shaft (not shown) in series with the rotating shaft 43, and the shaft and the linear driving shaft 44 are connected by a crank arm (not shown). It is possible.

Here, the operation of the pressure adjusting means configured as described above will be described. The pressure adjusting means is operated in advance by checking the thickness of the paper set on the paper feed shelf 3 or the like. That is, when the paper is fed by the paper feed roller 5, the contact pressure of the paper feed roller 5 is adjusted so that the paper is properly fed one by one. Therefore, the height of the friction plate 41 is adjusted by turning the dial 13. For this purpose, it suffices that the mark M of the dial 13 turning at the center of the scale plate (not shown) be adjusted to a predetermined scale. Thus, when the dial 13 is operated, the rotating shaft 43 connected thereto is also rotated. Then, the direct drive shaft 44 having the driven gear 49 meshing with the driving gear 45 is moved in the axial direction, whereby the swing table 39 and the friction plate 41 are vertically swung.

That is, when the linear motion shaft 44 is moved in the axial direction, as shown in FIG. 16, the slide plate 51 slides below the cam 42 attached to the swing table 39 along the longitudinal direction thereof, At this time, the height of the friction plate 41 is changed through the steel ball 53 contacting the cam contour surface 42A of the cam. The steel ball 53 is in the round hole 52 of the slide plate 51 and rolls while contacting the upper and lower surfaces with the underframe 37 of the unit base 4 and the cam 42. The cam contour surface 42A is clearly shown in FIG. In this way, a cam groove 55 that is in sliding contact with the steel ball 53 is formed so that the steel ball 53 can perform a definite movement.

According to the pressure adjusting means configured as described above, when the paper is fed by the paper feed roller 5, the dial 13 can be operated by an amount corresponding to the thickness and properties of the paper. The paper can be properly fed one by one while maintaining the contact pressure of the paper feed roller 5 in an optimum state.

When the feed roller 5 and the friction plate 41 are worn, the correlation between the input side and the output side deviates. That is, the contact pressure of the paper feed roller 5 on the paper does not act as set with respect to the set value by the dial 13.

For example, when the dial 13 is set to the scale of “10”, the gap between the friction plate 41 and the feed roller 5 should be 0.1 mm, but actually, a larger gap is formed. Will be done. For this reason, the paper is not fed or several sheets are fed at the same time.

Therefore, in such a case, an adjustment for correcting the error is required. Then, in the present invention, the adjustment can be made extremely easily. That is, the adjustment is made possible by separating the driving gear 45 from the driven gear 49 against the elasticity of the spring 54. In particular, in this embodiment, the error can be corrected by turning the dial 13 while pressing one end of the spring 54 down. Specifically, when the one end 54A is pressed down against the elasticity of the spring 54, the rotating shaft 43 loses the support by the spring 54 and swings about the connecting portion 46 as a fulcrum. Keep away from

At this time, the linear motion shaft 44 is kept stationary while both ends are supported by the bracket 47 and the unit base 4, while the rotation shaft 43 of the dial 13 has its outer periphery in contact with the spring 54. It can idle by operation. Then, after turning the dial 13 to set the mark M to the reference position corresponding to the gap between the friction plate 41 and the paper feed roller 5, the spring 54 is restored to engage the driving gear 45 and the driven gear 49. . For example, before the adjustment, the friction plate 41 is brought into a position (zero position) in contact with the paper feed roller 5, and the mark M of the dial 13 is adjusted to the zero position when the rotating shaft 43 idles. When the driving gear 45 is disengaged from the driven gear 49, the rotary shaft 43 may be directly pushed down instead of pushing down one end of the spring 54, and the dial 13 may be operated in that state.

After the above adjustment, if the dial 13 is adjusted to a predetermined scale based on the data determined by the thickness and properties of the paper, the paper is not fed out or fed out. The paper can be fed out one sheet at a time without wrinkling the paper.

By the way, depending on the paper, even if the height of the friction plate 41 is adjusted, the paper cannot be fed smoothly. For example, paper with a rough surface corresponds to this. In other words, paper having a smooth surface, such as gravure printing paper, requires an appropriate frictional force by the friction plate 41. However, paper having a rough surface may be prevented from being fed out by the friction plate 41 having a high gripping force. is there. Therefore, when feeding out such a sheet, an auxiliary tool 56 as shown in FIG. 17 is used. The auxiliary tool 56 includes a latch 57 formed of, for example, a metal plate, and a sheet member 58 such as a plastic film or a metal plate having one end fixed to the latch with an adhesive or the like. As shown in FIG. 14, the latch 57 is engaged with the front end of the frame 37 of the unit base 4 and the sheet member 58 covers the upper surface of the friction plate 41. According to this, depending on the properties (surface roughness) of the paper, it is possible to smoothly feed out various papers by attaching and detaching the paper.

As described above, the case where the paper feeder according to the present invention is installed in a collating machine has been described as an example. However, the present invention is not limited to this, and is applicable to a copier, a facsimile, and other devices. Needless to say.

[0039]

[Effect of the invention]

 As is clear from the above description, according to the present invention, by adjusting the height of the friction plate by operating the dial, the contact pressure of the paper feed roller acting on the paper is changed. Sheets can be fed properly one by one with the optimal contact pressure by the paper feed roller.

In particular, the friction plate is vertically moved while being moved in the axial direction via a rotating shaft whose pressure adjusting means is rotated by operating a dial, and a driven gear meshing with a driving gear provided on the rotating shaft. It consists of a simple mechanism with a linear motion shaft, and the rotating shaft is able to run idle while the driving gear is separated from the driven gear. If the contact pressure does not match the setting of the dial, the correlation can be easily reset to the reference.

Since the driving gear normally meshes with the driven gear firmly by the action of a spring, it is possible to adjust the contact pressure of the paper feed roller to the paper as set by simply operating the dial. it can.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a collating machine having a paper feeding device according to the present invention.

FIG. 2 is a perspective view showing a bundle of collated sheets.

FIG. 3 is a partially enlarged view showing a state where a portion surrounded by an imaginary line in FIG. 2 is separated;

FIG. 4 is a perspective view showing a guide plate for preventing the part from being separated;

FIG. 5 is a schematic side view showing the operation of the guide plate.

FIG. 6 is a partially enlarged view of FIG. 2, showing a state in which the side edges of the paper are adjusted by the guide plate;

FIG. 7 is a perspective view showing the front side of the paper feed shelf constituting the paper feed device of the present invention.

FIG. 8 is a perspective view showing the back side of the paper feed shelf.

FIG. 9 is a side view showing a support plate for keeping the paper feed shelf at a predetermined angle.

FIG. 10 is a schematic side view showing a state in which the angle of the paper feed shelf is switched stepwise by the support plate.

FIG. 11 is a perspective view showing a needle arm constituting the paper feeding device of the present invention.

FIG. 12 is a side view showing a hook attached to the needle arm.

FIG. 13 is a front view of the hook.

FIG. 14 is a cross-sectional view of the unit base constituting the sheet feeding device of the present invention.

FIG. 15 is a perspective view showing pressure adjusting means for vertically moving a friction plate provided on a unit base.

FIG. 16 is a perspective view of the unit base showing a state in which the friction plate is moved up and down by the pressure adjusting means.

FIG. 17 is a side view showing an auxiliary tool for sliding paper on the unit base.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2A-2D paper feeder 3 Paper feed shelf 4 Unit stand 5 Paper feed roller 9 Support plate 10 Needle arm 13 Dial 16 Guide plate 41 Friction plate 42 Cam 43 Rotation shaft 44 Linear shaft 45 Drive gear 46 Connection part 47 Bracket 48 long hole 49 driven gear 56 auxiliary tool

Claims (1)

[Utility model registration claims] 1. A paper feed shelf for stacking sheets, a friction plate provided to be capable of swinging vertically in a downstream side of the paper feed shelf, and a friction device provided above the friction plate and provided above the friction plate. A paper feed roller that feeds out the paper on the paper feed shelf one by one through the space between the friction plate and the paper feed roller. In the paper feeder, the pressure adjusting means includes a direct-acting shaft that swings the friction plate up and down while being axially moved via a driven gear that meshes with a driving gear, and is connected to one end having the driving gear. A rotating shaft that is rotated by the operation of the dial to be driven. The rotating shaft is set at a position where the driving gear meshes with the driven gear, and the driving gear is separated from the driven gear about a connecting portion with the dial as a fulcrum. And is fixed to the fixed position. When the driving gear is separated from the driven gear against the resilience of the spring against the elasticity of the spring, the direct-acting shaft is kept stationary and only the rotating shaft can idle by operating the dial. A sheet feeding device, characterized in that: