JPH0415723Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to a positioning mechanism for the paper feed table of a paper feed device, and in particular, a mechanism for positioning the paper feed table of a paper feed device, which is provided in the paper feed device and can be moved up and down with a stack of paper placed on the top surface. The present invention also relates to a positioning mechanism for a paper feed tray of a paper feed device that optimally positions a removable paper feed tray with respect to a paper feed unit such as a paper feed roller.

[Prior art and its problems]

In general, when positioning a paper feed tray that is installed in a paper feed device, etc. that is separate from a copying machine or other device, and that moves up and down with a stack of paper placed on the top surface, it is necessary to A member having a total of four positioning taper pins, two for each, is arranged, and
Corresponding holes and elongated holes were provided on the main body side of the paper feeding device, and the height and left and right positioning of the board was determined by fitting the taper pins into the holes.
With such a method, there is a problem that the accuracy of the front and rear taper pins, the inclination angle, etc. greatly affect the pull-out resistance, giving a bad impression to the operator. Another problem was that the load to be applied was large, resulting in very poor operability.

This idea solves the problems of the conventional ones as mentioned above, and it is possible to reduce the pull-out load when pulling out, and it also makes it possible to position it in the optimal state when pushing it in. An object of the present invention is to provide a positioning mechanism for a paper feed tray of a paper feed device.

[Means for solving problems]

In order to solve the above problems, this invention provides a paper feeding apparatus having a paper feeding tray which can be pulled out and pushed in with the paper feeding unit placed on the upper part of the board. A stopper is provided at a corner to rotatably dispose a roller whose outer peripheral surface has inclined surfaces at both ends thereof, and prevents the paper feed tray from being pushed into the machine frame of the paper feed device beyond the push-in position. and a rail at a position corresponding to each roller so that each roller rides on it when the paper feed table is in the push-in position, and at least the one on the front side in the direction of paper travel has a groove that matches the outer shape of the roller. When the paper feed tray is pushed into the push-in position, each roller rides on the rail and is positioned in the vertical direction, and the rollers are positioned in the grooves of the rail to adjust the direction of paper advance. This is a structure of a positioning mechanism for a paper feed tray of a paper feed device, which is characterized in that positioning is performed.

[Effect]

By adopting the above-mentioned means, this idea
By simply pushing in the paper feed tray, the paper feed tray is accurately positioned both horizontally and vertically relative to the frame of the paper feeder, and when pulled out, a force large enough to overcome the rolling resistance of the rollers is applied. It can be pulled out smoothly by applying
When the paper feed table is located inside the machine frame by simply pushing the sheet, it will be accurately positioned.

〔Example〕

Embodiments of this invention shown in the drawings will be described below.

The drawing shows the positioning mechanism of the paper feed tray of the paper feed device according to this invention.First, the entire paper feed device will be explained.
It is connected to the paper feed side of the square pipe 1.
The interior of the machine frame 2 assembled into a rectangular parallelepiped shape is divided into three stages: upper, middle, and lower. ) 3, a base plate 4 is provided so as to be movable between the front side and the back side in a horizontal state, and stoppers 5 are provided at portions corresponding to each step on the back side of the machine frame 2. .

On the upper surface of the substrate 4 provided at each stage, a first
As shown in the figure, an elevating unit 10 consisting of a bottom plate 11 and an elevating board 12 for placing paper, located above the bottom plate 11, is mounted.

This elevating unit 10 includes a flat bottom plate 11 supported by the upper part of embossed parts 6 protruding from four locations on the upper surface of the substrate 4, and supports protruding from the front and back sides of the bottom plate 11. It has an elevating board 12 provided between plates 13, 13, and the elevating board 1
2 is a drive source 1 provided on the upper surface of the bottom plate 11;
The driving force of 4 is transmitted through a shaft 15 to a plurality of pulleys 16.
It is possible to move up and down between the support plates 13 and 13 by transmitting the signal to a wire 17 that is stretched between the support plates 13 and 13.

Further, the driving source 14 for lifting and lowering is provided in each lifting unit 10, and the lifting board 12 is moved up and down by the rotation of the driving source 14.
During this lifting and lowering, the lifting board 12 is made to stop at a predetermined lifting position, that is, to prevent it from shifting from the desired lifting position due to inertia even if the drive source 14 is stopped. As shown in FIG. 12, a pulley 21 is connected to the drive source 14a via a one-way clutch 20 in order to contact the drive source and apply a load in order to immediately stop the rotation of the drive source 14 when the lift stops. A pressing lever 23, which rotates together with the pulley 21 and is biased by a spring 22, is pressed against the circumferential surface of the pulley 21.

Further, a long hole 18 is bored in the elevating board 12, and three sets of arms 19a, 19b, 19c are provided that project upward from below through this long hole 18. The lifting board 1 comes into contact with the front, back and rear ends of the stack of sheets placed on the upper surface of the lifting board 12 of the lifting unit 10.
The placement position of the stack of paper on the paper stack 2 is regulated.

The lifting unit 10 configured as described above is mounted on the upper surface of the board 4, which is disposed in the upper, middle, and lower stages of the machine frame 2, which constitutes the main body of the paper feeding device, so that it can be pulled out horizontally toward the front side. In this case, as described above, four embossed portions 6 are provided on the substrate, and the lifting unit 10 is located above each of the embossed portions 6. Moreover, among the four embossed portions 6, A screw passing through the bottom plate 11 of the lifting unit 10 is screwed into one of the screws, so the lifting unit 10 can be moved around this screw.
can be moved in the horizontal direction without being displaced in the vertical direction with respect to the substrate 4, and can be fixed to the substrate 4 at a desired position.

Further, the board 4, which can be pulled out horizontally via a rail member (archuride rail) 3 between it and the machine frame 2, is rotatably mounted on both sides of the board 4.
On the other hand, the machine frame 2 is provided with four short rails 25a, 25b at positions corresponding to each roller 24 when the substrate 4 is in the pushing position.

That is, FIGS. 13 and 14 show the positioning mechanism according to this invention, in which the board 4 is pulled out along the rail member 3 (in the upper right direction in FIG. 14) and then pushed in (in the upper right direction in FIG. 14). When the rollers 24 reach the push-in position in the lower left direction of the
It is designed to be positioned while riding on 5a and 25b.

In this case, the board 4 is pushed in because the back support plate 13 of the paper feed unit 10 which is placed on top of the paper feed unit 10 and forms a paper feed tray together with the board comes into contact with the stopper 5 provided on the machine frame 2. Further pushing is prevented and the pushing position is determined.

Of the respective rails 25a, 25b, two rails 25a, 25a are provided at the front in the paper traveling direction (left direction in FIG. 13, lower right direction in FIG. 14).
has a shape that almost matches the cross-sectional shape of the roller 24,
In addition, two rails 25b provided at the rear in the traveling direction,
25b are each formed into a flat plate shape.

That is, since both ends of the outer peripheral surface of the roller 24 are sloped surfaces, the two rails 25a provided at the front in the traveling direction are also separated from a portion that contacts the outer peripheral surface of the roller 24 and a portion that contacts both inclined surfaces. It has a groove.

Therefore, when each of the rollers 24 rides on the corresponding rails 25a, 25b, the substrate 4 can be positioned in the vertical direction, and the rails 25a can also be used to position the paper in the front-back direction in the traveling direction of the paper. It's summery.

Note that the board 4 is supported on both sides by the rail member (archuride rail) 3, and is movable in the vertical direction due to the play that the rail member 3 itself has, and The amount of movement of each roller 24 when it does not ride on each rail 25a, 25b is smaller than when it rides on it, so when the substrate 4 is pulled out or pushed in, the amount of movement of the substrate 4 is smaller.
The rail member 3 will not be damaged by the vertical movement.

Therefore, in the above case, first, the force required to pull out the board 4 is only needed to overcome the rolling resistance of the rollers 24, so it can be pulled out with a very light force, and the workability is good. When pushing in, the rail 25a has an inclined surface, and the roller 24 guided by this rail 25a also has an inclined surface that matches the inclined surface, and the rail 25b has a flat plate shape. Therefore, the rollers 24 are positioned horizontally and vertically with respect to the rails 25a and 25b, and the substrate 4, which is positioned in the thrust direction between the rollers 24, is also positioned horizontally and vertically. It is positioned and pushed into the machine frame 2.

Also, arms 19a, 19b, 19 that come into contact with the front, back and rear ends of the paper placed on the upper surface of the lifting board 12 of the lifting unit 10 to regulate the position.
As shown in FIGS. 15, 16, and 17, the lower end of the arm 19a at the front end and the lower end of the arm 19c at the rear end are interlocked with each other on the lower surface of the lifting board 12.

That is, a support tube 27 is slidably fitted into a slide pipe 26 installed at the lower ends of the support plates 13, 13 in a direction perpendicular to the paper conveyance direction, and the front end and rear end are fitted into the support tube 27 in a slidable manner. The lower ends of arms 19a and 19b are connected.

Further, an interlocking cam 28 is attached to the front end arm 19a located below the elevating board 12 on which the paper is placed, and inside the cam 28a of the interlocking cam 28,
An interlocking roller 29 for moving a rear end arm 19c attached to a support tube 27 fitted in a slide pipe 26 extending in the same direction as the paper conveyance direction is located below the lifting board 12, Therefore, when the front end arm 19a is moved along the slide pipe 26, the interlocking cam 28 moves with this movement, and the interlocking roller 29 located inside the cam 28a of the interlocking cam 28 moves up and down. Since it is attached to the rear end arm 19c which is movable in the same direction as the conveyance direction of the paper on the lower surface of the board 12, the rear end arm 19c also moves together, that is, the front end arm 19a is moved to the rear end arm 19b side. When the rear end arm 19c moves to the front in the sheet conveyance direction, the rear end arm 19c moves forward in the sheet conveyance direction.

Therefore, two of the three arms 19a, 19b, 19c supporting the edges of the paper, 19a, 19c, support the two edges of the paper in one motion,
That is, it can come into contact with the front end and the rear end.

Further, at the upper left side of the upper, middle, and lower machine frames 2, a paper feed roller 31 and the like are provided for sequentially feeding the stack of sheets placed on the elevating base plate 12 of the elevating unit 10, starting from the uppermost one. A paper feed unit 30 consisting of a paper feed unit 30 is attached to each paper feed unit 30.

That is, each paper feed unit 30 is positioned with respect to the machine frame 2 of the paper feed device by two pins a and b protruding from the rear side of the machine frame 32 of the paper feed unit 30, and The side is fixed to the machine frame 2 via a screw 33, and the main part is composed of a roller 36 and another roller 37 attached to a shaft 35 that is rotationally driven by a drive source, as shown in FIG. A double-feed prevention belt 38 stretched between them, a double-feed prevention roller 38a that presses against the lower surface of the double-feed prevention belt 38, a half-moon roller 39 that comes into contact with the top surface of this double-feed prevention belt 38, a shaft 40 of this half-moon roller 39, and a drive shaft. 41, and a solenoid 43 that changes the transmission state of the one-way clutch 42.Furthermore, the shaft 35 driven by the drive source is capable of vertically swinging. arm member 44
is pivotally attached to the front end of the arm member 44, and a paper feed roller 31 that comes into contact with the uppermost one of the stacks of paper placed on the upper surface of the lifting board 12 is mounted on the front end of the arm member 44.
is rotatably attached, and the shaft 35 and paper feed roller 31 rotated by the drive source are connected to a drive transmission member 45.
It is now possible to link them with each other.

Further, the paper feed unit 3 configured as described above
0 are removably attached to the three stages of the machine frame 2 of the paper feeding device, and this paper feeding unit 30
On one side, there is a paper feed roller 31 of the paper feed unit 30.
A lever 50 is provided for positioning the lever upwardly via the arm member 44 to which it is attached.

That is, as shown in FIGS. 19 and 20, one end of this lever 50 is urged upward by a spring 51, and this one end is pressed upwardly by a spring 51.
4, and the other end of this lever 50 protrudes into the range of movement in the front-rear direction of the board 4 on which the lifting unit 10 is placed, and therefore,
When storing the board 4 inside the machine frame 2, the roller 4a of the board 4 moves the other end of the lever 50 upward against the urging force of the spring 51, so one end of the lever 50 moves downward, As a result, the upward biasing force on the arm member 44 is released, so that the paper feed roller 31
moves downward together with the arm member 44 and maintains a state in which it is in contact with the upper surface of the paper.

On the left side of the machine frame, there is a section for feeding the paper sent out from the three-stage paper feeding unit 30 configured as described above to the copying machine A arranged adjacently. A group of rollers forming a conveyance system is provided.

FIGS. 6 to 10 show the structure of the parts constituting the conveyance system, and the drive system for operating the paper feed units 30 provided in the upper, middle, and lower stages is a drive source 61. Each sheet feeding unit 30 is operated via a timing belt 60 driven by a timing belt 60 driven by a timing belt 60 driven by a timing belt 60 driven by a timing belt 60 driven by a timing belt 60 driven by a timing belt 60 driven by a timing belt 60 driven by a timing belt 60 driven by a timing belt 60 driven by a timing belt 60 driven by a timing belt 60.

Further, the plurality of gears rotated by the timing belt 60 driven by the drive source 61 are located on the left side of the main body of the paper feeder, that is, in the copying machine A, as shown in FIGS. 9 and 10. One gear 62 of the plurality of gears is capable of meshing engagement with the gear of the copying machine A when the paper feeding device is coupled to the copying machine A. Although not shown, a gear on the copying machine side is connected to a pair of upper and lower paper feed rollers, and the upper and lower pair of paper feed rollers are located closer to the image carrier of the copying machine than the paper feed rollers, Further, it is driven and connected by a belt to a pair of upper and lower paper feed rollers located closer to the paper feed device than the paper refeed roller (registration roller).

Therefore, by simply connecting the paper feeding device to the paper feeding side of the copying machine, driving force on the side closer to the paper transport direction than the paper refeed roller (registration roller) of the copying machine can be ensured. It is something that can be done.

Further, as shown in FIG. 6, the conveyance path 70 from the paper feed unit provided at each stage of the paper feed device to the upper and lower pair of paper feed rollers of the copying machine is connected to the paper feed unit 30 for ejecting the paper from each paper feed unit 30, as shown in FIG. A pair of rollers is provided for conveying the loaded paper, and in consideration of a case where the paper gets jammed between the pair of rollers during conveyance, a rotary plate 71 whose upper end is pivotally mounted is provided. Since a paper conveyance path is thus formed, the conveyance path 70 can be opened by swinging this rotating plate.

In addition, as shown in FIGS. 21, 22, and 23, there are two locations on the right side of the bottom surface of the machine frame 2 that constitute the main body of the paper feeding device, one on the front side and the other on the back side. An adjuster star 80 that can adjust the height of the main body is attached, and a caster 81 is also attached, and the center part of the left side of the machine frame 2 is in contact with the lower surface and left end of the machine frame 2, and the upper end is A connecting member 83 that extends toward the machine side, has a slightly raised tip end, and has a pin 82 protruding from a portion that abuts the left end of the machine frame 2. The pin 82 can be inserted into a hole 85 bored in the square pipe 84 at the lower right end of the copying machine, and the portion extending horizontally from the upper end can ride on the top surface of the square pipe 84 of the copying machine. After the paper feeding device is placed adjacent to the copying machine, the connecting member 8
3 onto the square pipe 84 of the copying machine, the sheet feeding device can be positioned with respect to the copying machine in that state.

In the above method, first, a predetermined amount of a bundle of paper is placed on the upper surface of the lifting board 12.

In this case, the paper feed units 30 located in the upper, middle, and lower stages are pulled out to place a stack of paper, but if you pull out the paper feed units 30 in the three stages at any time, it may cause damage to some parts of the paper. When a stack of paper is stored, the center of gravity may shift to the front side and the entire paper feeding device may fall over, so when pulling out the paper feeding device, one of the three paper feeding units 30 is The structure is such that only things can be brought out.

That is, as shown in FIG. 24, a hook-like arm is provided on the side surface of each board 4 of the three-stage paper feeding unit 30, and the action of this arm allows the board to be pulled out only one stage at a time. ing.

That is, in FIG. 24, the left arm 9
0 is urged downward by a spring 91 and has a hook portion that can be engaged with pins 92 and 93 protruding from the side surfaces of the upper and middle substrates 4, and the central arm 94 is The right arm 98 is biased downward by a spring 95 and has a hook portion that can be engaged with pins 96 and 97 protruding from the side surfaces of the upper and lower substrates 4.
pins 100 and 101 protruding from the sides of the middle and lower substrates 4;
It has a hook part that can be locked.

Then, on the side surface of the lower board 4, there is a rail that comes into contact with the pin 102 of the arm 90 when in the retracted state, so that the hook part of the arm 90 releases the engagement with the pins 92 and 93 of the upper and middle boards. 103
A pin 104 of the arm 94 is provided on the side surface of the middle board 4 in the retracted state.
A rail 105 is provided on the side surface of the upper board 4 to disengage the hook part of the arm 94 from the pins 96 and 97 of the upper and lower board 4 when in the retracted state. The arm 98
A rail 107 is provided that abuts the pin 106 of the arm 98 to release the hook portion of the arm 98 from the pins 100, 101 of the middle and lower substrates 4.

Therefore, there is no risk that the upper, middle, and lower substrates 4 will be pulled out at the same time.

Note that without using the arms 90, 94, and 98, as shown in FIGS. 25 and 26, the lock pin 111 can be moved in and out by the solenoid 110 and engaged with the lock guide 112 provided on the board 4. Alternatively, the movement of the substrate 4 may be prevented, and the microswitch 113 may detect that the substrate 4 has been pulled out, and control whether the solenoid 110 is activated or not.

Next, to explain the operation of each part, first, a stack of 1000 sheets or more can be placed in each paper feed unit 30, and after pulling out the paper feed unit 30 that is scheduled to be loaded, the stack of paper can be loaded. The lifting board 1 is placed on the paper stack by touching the arms 19a, 19b, and 19c against the front end, back end, and rear end (right end) of the paper stack.
The position of the paper stack on the paper stack 2 is regulated.

Then, the elevating board 12 automatically rises, and the upper surface of the uppermost sheet of the stack of sheets placed on the upper surface comes into contact with the paper feed roller 31 of the paper feed unit 30. When the position of the uppermost sheet changes, the elevating board 12 automatically rises.

Further, the sheets are fed out by rotating the paper feed roller 31, and are sent out sequentially in response to commands from the main body of the copying machine.

At this time, there are times when it is desirable to send out one sheet at a time, and a plurality of sheets may be sent out.

The fed paper is sent to the double feed prevention section (separation section), that is, the paper feeding unit 30 that is integrated with the paper feeding roller 31 and is removable from the machine frame 2. Here, it is separated from multi-fed sheets to ensure that only one sheet is fed.

Any method may be used as this separation means, but in this paper feeder, double feed prevention belt 38 and double feed prevention roller 38a are used to ensure the separation by using a double feed prevention belt 38 and a double feed prevention roller 38a to make the conveyance speeds of the upper and lower surfaces of the paper different. method is adopted.

The paper separated into one sheet moves forward on the conveyance path 70,
The paper moves without stopping to the paper refeed roller section (registration roller section) provided in the copying machine main body, and once stops at the paper refeed roller section (registration roller section), the paper curl is corrected and the copying machine It is designed to restart at a certain timing based on a control signal from the main unit.

The above operation is designed to feed paper in the same way for each lifting unit 10, but depending on the signal from the copier main body, even if the copying operation is in progress at the same time, the lifting units 10 that are not in use will not be able to copy even if they are pulled out. Paper can be replenished and replaced without interruption.

In addition, if a jam occurs during paper feeding in each lifting unit 10, the lifting unit 10 automatically lowers.
Jam removal is now easy.
In this case, since the conveyance path 70 is provided with a rotary plate 71, jamming of the conveyance path 70 can be easily performed.

Each lifting unit 10 has an independent lifting drive source 14.
However, the clutch may be driven by a single drive source.

In addition, regarding paper feeding, a dedicated drive source 61 is provided for feeding the paper by the paper feeding unit 30, passing through the separating section, and conveying path 70.
is driven via a clutch.

The feeding timing is based on a signal from the main body, and the paper is fed out intermittently, and the conveyance speed of the paper can be synchronized to any speed in accordance with the speed of the paper feeding main body.

[Effect of idea]

By configuring this idea as described above,
With a very simple configuration, the paper feed table can be accurately positioned with respect to the machine frame, and therefore the paper placed on top can be transported reliably. When pulling out the table, only the force that overcomes the rolling resistance of the rollers needs to be applied, so the pulling out process is smooth.Also, when pushing the table in, it is possible to position it accurately just by pushing it in. , it has a very simple structure and has excellent effects such as being able to be manufactured at low cost.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view of the whole, Fig. 2 is a schematic plan view, Fig. 3 is a schematic front view, Fig. 4 is a partially cutaway schematic perspective view, Fig. 5 is a schematic vertical sectional view of one stage, Figures 6 to 8 show the front delivery side, Figure 6 is a front view, Figure 7 is a plan view, Figure 8 is a right side view,
Figures 9 and 10 show the delivery side of the back side, Figure 9 is a front view, Figure 10 is a right side view, Figures 11 and 12 are diagrams showing the lifting drive source and its stopping mechanism, 13 and 14 are diagrams showing the positioning mechanism of the paper feed tray of the paper feed device according to this invention, and FIG.
Figures 16 and 17 are diagrams showing the relationship between the lifting board and the arm, Figure 18 is a diagram showing the main parts of the paper feed unit, and Figures 19 and 20 are diagrams showing the relationship between the board and the paper feed unit. Diagram showing the relationship with the paper roller, 2nd
1 and 22 are diagrams showing the state of connection between the copying machine and the paper feeder, FIG. 23 is an enlarged view of the main part of FIG. 22, FIG. 24 is a diagram showing the locking mechanism of the board, and FIG.
5 and 26 are diagrams showing other embodiments of FIG. 24. 1,84...square pipe, 2,32...machine frame, 3
...Rail member (archuride rail), 4...
Substrate, 4a, 24, 36, 37...Roller, 5...
...stopper, 10...lifting unit, 11...bottom plate, 12...lifting board, 13...support plate, 14,
61... Drive source, 14a, 15, 35, 40...
Shaft, 16, 21... Pulley, 17... Wire, 18... Long hole, 19a, 19b, 19c, 9
0,94,98...Arm, 20,42...One-way clutch, 25a, 25b, 103, 105,
107...Rail, 26...Slide pipe, 27
...Support tube, 28...Interlocking cam, 28a...Cam, 29...Interlocking roller, 30...Paper feeding unit,
31...Paper feed roller, 33...Screw, 38...Double feed prevention belt, 39...Half-moon roller, 41...Drive shaft, 43,110...Solenoid, 44...Arm member, 45...Drive transmission Member, 50... Lever, 51, 91, 95, 99... Spring, 60...
Timing belt, 62... Gear, 70... Conveyance path, 71... Rotating plate, 80... Adjuster star, 8
1... Caster, 82, 92, 93, 96, 9
7,100,101,102,104,106...
... Pin, 83 ... Connection member, 85 ... Hole, 111
...Lock pin, 112...Lock guide, 1
13...Micro switch.

Claims (1)

[Scope of utility model registration request] In a paper feeding apparatus having a paper feeding table which can be pulled out and pushed in with a paper feeding unit 10 placed on the upper part of the substrate 4, the four parts of the substrate 4 of the paper feeding table are
A roller 24 having an inclined surface at both ends of its outer peripheral surface is rotatably disposed at a corner to prevent the paper feed table from being pushed into the machine frame 2 of the paper feed device beyond the push-in position. and a stopper 5 that is located at a position corresponding to each roller 24 so that each roller 24 rides on it when the paper feed table is in the push-in position, and at least a stopper 2 on the front side in the direction in which the paper travels.
5a and 25a are provided with rails 25a and 25b having grooves that match the outer shape of the roller 24, and when the paper feed table is pushed into the pushing position, each roller 24 rides on the rails 25a and 25b and moves up and down. A positioning mechanism for a paper feed table of a paper feed device, characterized in that positioning is performed in the direction in which the paper moves, and positioning in the direction in which the paper advances is performed by positioning the rollers 24 within the grooves of the rails 25a.