JP2889786B2 - Paper feeder with differential pulley reduction mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeder having a differential pulley speed reduction mechanism, and more particularly, to a paper feeder suitable for use in a large capacity cassette elevator of a copying machine or a printer.
A list on which an upper surface is substantially flat and paper is placed on the upper surface (also referred to as a paper feed tray), a frame surrounding the wrist so that the wrist can move up and down, each pulley operates in substantially the same plane, and A differential pulley reduction mechanism that supports the wrist from the side and moves it up and down in the frame, and records codes, characters, images, etc. on paper such as copiers, printers, facsimiles, and various printing devices. The present invention relates to a paper feeding device that supplies paper (including natural paper, synthetic paper, and various sheet materials) to a paper surface recording device.

[0002]

2. Description of the Related Art There is a demand for copying machines and printers to copy and print on a large number of sheets. In response to this request, a large-capacity cassette elevator that continuously supplies a large number of sheets to a copying machine or the like without cutting the sheets is used. FIG. 7 is a perspective view of a drive unit configuration of an elevator elevating device used in a conventional large-capacity cassette elevator.

In the elevator elevating device shown in FIG. 7, guide members b which extend vertically and are provided on both right and left sides of a list a on which sheets are placed with respect to the sheet supply direction are provided. On the lower surface of the wrist a, a support member c for supporting the wrist a is provided over the left and right. Also, a plurality of guide rollers d that fit into the rails of the guide member b and roll are provided on the left and right sides of the wrist a so as to be rotatable apart from each other in the vertical direction, and suspend the wrist a. The belt member e is fixed by a fixing member f.
The belt member e is directed upward through a roller g provided above the wrist a, and is led up by a winding pulley h1 provided at both ends of the winding shaft h. The belt member e is wound or unwound on the hoist pulley h1 to move up and down along the guide member b while keeping the wrist a horizontal. The driving force at the time of the elevation is given from the motor k via a motor pinion, a spur gear reduction unit i having a two-stage gear, a worm gear, and a worm gear reduction unit j having a worm wheel.

[0004]

However, in the conventional elevator elevating device, the wrist a is supported by the support member c at the center in the front-rear direction along the paper supply direction, so that it is easily bent at both ends in the front-rear direction. There is a problem that the horizontal stability in the front-rear direction is poor. In addition, since the horizontal holding of the wrist 22 in the width direction is maintained by the guide roller d and the guide member b, it is necessary to obtain high precision of the guide roller d and the guide member b, and the wrist 22 is vertically separated. It is necessary to increase the interval between the plurality of guide rollers d. Therefore, in order to increase the horizontal stability in the front-rear direction, there is a problem that the cost is increased, the configuration is enlarged, and more space is required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has as its object the advantage that the wrist is hardly bent and the wrist can maintain the horizontal stability in the front-rear direction and the width direction. An object of the present invention is to provide a sheet feeding device having a dynamic pulley speed reduction mechanism.

[0006]

The present invention has the following structure to achieve the above object. That is, the present invention provides a list on which an upper surface is substantially flat and paper is placed on the upper surface, a frame surrounding the list such that the list can move up and down, each pulley operates in substantially the same plane, and And a differential pulley deceleration mechanism for moving the paper up and down in the frame while supporting the paper from the side, and feeding the paper to the paper surface recording device. First and second pulleys movably provided, third and fourth pulleys rotatably provided at two horizontally separated portions below the frame, and the third and fourth pulleys below the frame. Fifth and sixth pulleys provided between the four pulleys, and two locations which are horizontally separated from the support side surface of the wrist and located inside the locations where the first and second pulleys are provided. And the center of the two places 7 provided at, and the pulley of the eighth and ninth, the first
Wraps around the pulley and goes downward to the seventh pulley, and goes to the eighth pulley in one direction substantially along the side surface of the wrist via the seventh pulley,
Via the pulley and heading upward to the second pulley, wrapping around the second pulley and lowering the fourth pulley
Toward the sixth pulley in the other direction along the side of the wrist via the fourth pulley,
Via the sixth pulley, upward toward the ninth pulley, wind around the ninth pulley, downward toward the fifth pulley, and via the fifth pulley in the other direction. A belt member heading toward the third pulley and moving upward through the third pulley toward the first pulley, and synchronizing with the feeding of the belt member between the seventh pulley and the eighth pulley. Peripheral speed difference means for driving the fifth and sixth pulleys so as to cause a difference in their respective peripheral speeds, which are disposed on the left and right sides in the width direction of the wrist perpendicular to the paper supply direction. A drive means is provided on at least one of the left and right sides in the width direction of the wrist, and a left and right feed for rotating the fifth and sixth pulleys provided on each of the left and right side surfaces in a synchronous manner in the left and right directions in the width direction. Synchronization means A sheet feeding apparatus having a differential pulley reduction mechanism, characterized in that there was e.

[0007]

In the present invention, since the belt feed synchronizing means is provided, it is possible to synchronize the feed of the belt member between the seventh pulley and the eighth pulley, and therefore, the seventh and eighth pulleys can be synchronized. Horizontal stability along the pulley arrangement direction, that is, the sheet supply direction, can be reliably maintained. In addition, since the left and right feed synchronizing means is provided, the fifth and sixth pulleys provided on each of the left and right side surfaces can be synchronously rotated in the left and right directions in the width direction. Therefore, horizontal stability in the left and right directions in the list width direction perpendicular to the paper supply direction can be reliably maintained.

Further, the wrist has a structure in which the wrist is suspended at four points by a belt member extending downward from the first pulley and the second pulley provided in the left and right directions, so that the load balance is improved. Also, the wrist ribs can be made smaller. Further, the configuration of the four-point suspension as described above is effective to hold the wrist horizontally, and it is not necessary to provide the guide rails and the guide rollers with high accuracy as in the related art, so that the configuration can be simplified. The speed reduction mechanism of the present invention is a differential pulley speed reduction mechanism that does not use gears. In this differential pulley reduction mechanism, noise generated by the pulley and the belt is very small as compared with a reduction mechanism including a spur gear and a worm gear. Therefore, the speed reduction mechanism of the present invention is a low-noise speed reduction mechanism, so that the noise is reduced at the time of ascending and descending at a high speed. For example,
The noise is very low when the list is lowered at high speed during initial setting and when replenishing paper.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory diagram of a differential pulley reduction mechanism for raising and lowering a wrist of a sheet feeding device according to a first embodiment of the present invention. FIG. 2 is an explanatory diagram of a control system and operation of the paper feeding device, and FIG. 3 is an explanatory diagram of an example in which the paper feeding device is used in a copier and a printer. It can be used for a paper surface recording device. In the following, paper (copy paper)
Is referred to as a width direction of the wrist 22.

As shown in FIG. 1, the paper feeder includes a wrist 22 having a substantially flat upper surface and a sheet placed thereon.
Each pulley operates in substantially the same plane as a frame 30 (only a pulley fixing portion is shown) surrounding the wrist 22 so that the wrist 22 can move up and down, and supports the wrist 22 from the side surface (end surface in the width direction). And a differential pulley deceleration mechanism that moves up and down in the frame 30 to supply paper to a paper surface recording device such as a copying machine or a printer.

That is, first and second pulleys 20 and 15 are rotatably provided at two locations above the frame 30 which are horizontally separated from each other. In addition, third and fourth pulleys 21 and 14 are rotatably provided at two locations separated in the horizontal direction below the frame 30. Fifth and sixth pulleys 10 and 7 are provided between the third and fourth pulleys 21 and 14 below the frame 30.

The first and second pulleys 20 and 15 are horizontally separated from the supporting side surface of the wrist 22 and are separated from each other.
The seventh, eighth, and ninth pulleys 19 are located at two locations located inside the location where the
16 and 13 are provided.

[0013] Wound around the first pulley 20 toward the seventh pulley 19, and in one direction (the paper supply direction) substantially along the side surface of the wrist 22 via the seventh pulley 19. It goes to the eighth pulley 16, goes upward through the eighth pulley 16, toward the second pulley 15, winds around the second pulley 15, and goes downward to the fourth pulley 14. ,
Via the fourth pulley 14, heading toward the sixth pulley 7 in the other direction along the side surface of the wrist 22, heading upward via the sixth pulley 7 toward the ninth pulley 13, 9, goes down to the fifth pulley 10, goes through the fifth pulley 10, goes in the other direction to the third pulley 21, goes through the third pulley 21. Then, the first timing belt 12 is stretched between the pulleys so as to head upward to the first pulley 20.

In the embodiment, the first timing belt 12 is connected between the seventh pulley 19 and the eighth pulley 16.
Pulley 24 and pulley 25 are fixed coaxially with pulley 16 and pulley 19 as a belt feed synchronizing means for synchronizing the feed of (belt member), and timing belt 23 is wound around pulleys 24 and 25. ing. The pulley 24 is driven by the timing belt 23.
And the pulley 25 rotate synchronously.
Therefore, the pulley 16 and the pulley 19 rotate synchronously. The belt feed synchronizing means is disposed on the left and right sides in the wrist width direction perpendicular to the sheet supply direction.

The fifth and sixth pulleys 10 and 7 are respectively provided with differential pulleys 9 and 6 which are coaxial and close to each other and have different diameters. The second timing belt 8 is stretched. The differential pulleys 6 and 9 and the second timing belt 8 constitute a peripheral speed difference driving unit that drives the fifth and sixth pulleys 10 and 7 to generate a difference in peripheral speed. The respective pulleys are disposed substantially symmetrically on both sides in the width direction of the wrist 22. In the following, list 22
The left component is denoted by L, and the right component is denoted by R. However, the peripheral speed difference driving means is provided only on the left side in the width direction of the wrist 22. These are examples of the arrangement of the differential pulley reduction mechanism of the present invention, and the mechanism can be disposed at any position or both sides of the side surface of the wrist. The fifth pulleys 10R and 10L on both sides in the width direction are fixed to both ends of the shaft 11 along the width direction and rotate at the same rotation speed (that is, rotate in synchronization).
The sixth pulleys 7R and 7L on both sides in the width direction are also fixed to both ends of the shaft 5 along the width direction and rotate at the same rotation speed (that is, rotate in synchronization). In the embodiment, the left / right feed synchronization means is configured as described above. However, the left / right feed synchronization means of the present invention is not limited to the means fixed to both ends of such a shaft, and it goes without saying that other means can be used.

(Configuration of Wrist Driving Unit) Below the wrist 22, the motor 1 and the shafts 5 and 1 extending in the width direction of the wrist 22
1 is provided. The power of the motor 1 is transmitted to the pulley 4 fixed to the shaft 5 by the pulley 2 fixed to the shaft of the motor 1 and the timing belt 3, and the shaft 5 is driven by the pulley 4. The left and right sixth pulleys 7L and 7R are fixed to both ends of the shaft 5, and the power of the motor 1 is divided into two by the shaft 5 and transmitted to the pulleys 7L and 7R.

The pulley 7R drives the following pulleys provided on the right side of the wrist 22 by the first timing belt 12R. In other words, what is driven is the pulley 14
R, pulley 15R, pulley 16R, pulley 17
R, pulley 18R, pulley 19R, pulley 20
R, pulley 21R, pulley 10R, and pulley 13R, and pulleys 17R and 18R correspond to pulley 1
6R and the first pulley wound around the lower part of the pulley 16R and the pulley 19R, being disposed between the pulley 19R.
Is wound around the upper part of the timing belt 12R. The pulley 16R and the pulley 19R are coaxially connected to the pulley 2R.
4R and pulley 25R are fixed, and timing belt 2
3R is wound around pulley 24R and pulley 25R. As a result, the pulley 24R and the pulley 25R rotate in synchronization, and therefore, the pulley 16R and the pulley 19R rotate in synchronization.

The pulley 7L is connected to the pulley 7R.
Similarly, the following pulleys on the left side of the wrist 22 are driven by the timing belt 12L. In other words, the driven components are the pulley 14L, the pulley 15L, the pulley 16L, the pulley 17L, the pulley 18L, the pulley 1
9L, pulley 20L, pulley 21L, pulley 10
L and pulley 13L, and pulley 17L and 1
8L is provided so as to be sandwiched between the pulley 16L and the pulley 19L, and winds the first timing belt 12L wound around the lower part of the pulley 16L and the pulley 19L on the upper part. A pulley 24L and a pulley 25L are fixed coaxially to the pulley 16L and the pulley 19L, and a timing belt 23L is wound around the pulley 24L and the pulley 25L. Thereby, pulley 2
The 4L and the pulley 25L rotate synchronously, and therefore, the pulley 16L and the pulley 19L rotate synchronously.

(Arrangement and Configuration of Pulley for Differential Output) In FIG. 1, a differential output section is arranged on the left side of the wrist 22.
The differential pulley 6L and the pulley 7L are coaxially fixed to the shaft 5, and are integrated in a stepped structure having different diameters. The pulley 10L is fixed to both ends of the shaft 11 together with the pulley 10R. 9L differential pulley is pulley 10
L and coaxial. Differential pulley 6L and differential pulley 9L
Has a timing belt 8L wound therearound and outputs differentially. The diameters D ₆ and D ₉ of the differential pulleys 6L and 9L are D
₆ <D ₉ (D ₆ > D ₉ is also possible).

Although the above differential output section is provided only on the left side of the list 22, two sets of the differential output section can be used at both ends in the width direction of the list 22. Thereby, the shaft 5 and the shaft 11
The difference between the left and right due to the torsion can be minimized.

(Control System of Paper Feeding Apparatus) As shown in FIG. 2, the paper feeding apparatus has a controller EC for controlling the operation thereof, and the controller EC has a start button switch 35. An upper limit switch (LS-1) 31 for detecting the upper surface of the stacked sheets 34 is provided above the list 22, and a sheet detection switch (for detecting the presence or absence of the sheet 34 on the list 22) is provided below the list 22. LS-1) 32, and a lower limit switch (LS-3) 33 for detecting the lower end of the wrist 22 and the motor 1 are provided below the wrist 22. Above the wrist 22, a pickup roller 40 that rotates in contact with the upper surface of the paper 34 to pick up the paper 34 and feeds the paper 34 in the supply direction, and supports the pickup roller 40 rotatably at one end and the other end. A roller arm 41 swinging to the center, a paper feed roller 42 for feeding out the picked-up paper 34 in the supply direction, and a paper 3 to be sent out
Retard roller 4 to limit 4 to one by one
3 are provided. Further, as shown in FIG. 3, the paper feeding device of the embodiment can be disposed on the paper supply side of a copying machine or a printer. Since the configuration and operation of the copying machine and the like are well known, a description thereof will be omitted.

(Operating Principle of Differential Pulley) In the present invention, a well-known moving pulley principle is used as a differential mechanism. 4 and 5 illustrate the differential mechanism of the moving pulley. In FIG. 4, it is assumed that the front side of the belt B wrapped around the pulley D is sent to the left at a speed V1 and the other side is pulled to the right at a speed V2. The speed Vs of the carriage S that supports the pulley D at this time is as follows: Vs = (V2−V1) / 2 (1) A generally known moving pulley is a special case where one end of the belt B is fixed and V1 = 0 as shown in FIG. 5, and Vs = (V2) / 2.

(Related Expressions of Differential Pulley Speed Reduction Mechanism) In the embodiment shown in FIG. 1, if the dimensions and conditions of each part are as follows, the following expression is established. Shaft 5 rotation speed = N ₅ Pulley 6L diameter = D ₆ Pulley 7L (7R) diameter = D ₇ Pulley 9L diameter = D ₉ Pulley 10L (10R) = D ₁₀ Pulley 13L (13R) = D ₁₃ List 22 Elevating speed = V _{twenty two}

| D ₆ −D ₉ |> 0 & D ₇ = D ₁₀
= When D _13, for the speed reduction ratio R and the lifting speed V _22, the following expression holds. R = (1/2) × | (D ₆ −D ₉ ) | / D ₆ (2) V ₂₂ = (1/2) × (D ₇ / D ₉ ) × π × N ₅ × (D ₉₋ D ₆ ) (3) As a result, as shown in equation (3), 1 / (1) of the difference between the peripheral velocities is obtained.
The speed reducer is capable of moving the wrist 22 up and down at a feed speed of 2.

(Function and role of differential reduction mechanism of paper feeder)
The differential pulley reduction mechanism of the paper feeder is based on the principle of the differential pulley, and the respective roles and functions will be described with reference to FIGS. 6 and 1 showing the configuration of the differential pulley reduction mechanism. . The power transmitted from the motor pulley 2 to the pulley 4 via the belt 3 by the motor 1 is transmitted to the left and right driving pulleys 7L and 7R of the shaft 5.

The pulley diameter of the differential pulley 6L is set so that a peripheral speed difference is generated between the differential pulley 6L and the differential pulley 9L in advance (Example D).
_9> D _6, in which Note D ₉ <holds true at D ₆₎ was. These differential pulleys 6L and 9L are connected to a timing belt 8L.
, A speed difference is generated between (the pulleys 7L and 7R: pulleys 13L and 13R) and (the pulleys 10L and 10R: pulleys 13L and 13R).
Due to this speed difference, pulleys 13L and 13R, 1R attached to the wrist 22 via belts 12L and 12R.
6L and 16R, 17L and 17R, 18L and 18
R, 19L and 19R are operated as moving pulleys to raise and lower the wrist 22. Therefore, the paper feeding apparatus of the present embodiment can pick up and feed paper one by one on the list 22 by appropriate selection of the reduction ratio. In addition, the list 22 can be listed little by little according to the amount of paper used, so that paper can always be fed from a fixed position during paper feeding.

(Holding mechanism for the horizontal direction of the wrist 22)
In the embodiment, the pulleys 24R and 25R are fixed coaxially with the pulleys 16R and 19R, and the timing belt 23 is fixed.
Since R is wound around the pulleys 24R and 25R, the pulleys 24R and 25R and the pulley 16R
And 19R rotate synchronously. In addition, pulley 16L
Pulleys 24L and 25L are coaxially fixed to the pulleys 24L and 25L.
L, the pulleys 24L and 25
L and the pulleys 16L and 19L rotate synchronously. As described above, since the timing belts 12R and 12L are sent synchronously in the front-back direction of the wrist 22, the wrist
2 can be kept horizontal in the front-rear direction.

(Left and Right Horizontal Holding Mechanism of Wrist 22) The fifth pulleys 10R and 10L on both sides in the width direction are
1 are fixed to both ends and rotate synchronously. Further, the sixth pulleys 7R and 7L are fixed to the shaft 5 and rotate synchronously. Therefore, the timing belt 12R on the right side in the width direction and the timing belt 12L on the left side transmit power in synchronization with each other, so that the wrist 22 can be moved up and down while keeping the left and right horizontal.

(Four-Point Hanging Structure of Wrist 4) The wrist 22 has a structure in which it is hung at four points by pulleys 20R and 20L and pulleys 15R and 15L provided in the left and right directions, respectively, and timing belts 12R and 12L directed downward. Become. Therefore, the load balance is good. In addition, since the four-point hanging structure can stably hold the wrist horizontally, there is no need to make the guide rails and guide rollers highly accurate as in the related art, and the configuration can be simplified. In addition, at the time of initial setting and when replenishing copy paper, the list 22 is lowered to the lowest position, and after replenishing the paper, the list 22 is picked up.
The noise of the differential pulley reduction mechanism is much smaller than that of a worm reduction gear or a spur gear.

Next, the operation of the supply apparatus of the embodiment will be described. (Fixed Position Feeding Operation) The fixed position feeding operation of the paper feeding apparatus will be described with reference to FIGS. 1, 2, and 6. FIG. Start the motor 1. → The list 22 rises. → Paper 3
4 rises with list 22 and upper limit switch 3
Turn 1 ON. → Motor 1 stops. → List 22
Stops.

When the paper feed timing comes, the controller E
In response to the instruction of C, the pickup roller 40 of the main body operates to feed a required amount of copy paper one by one. → The paper position goes down. → The upper limit switch 31 is turned off. → The motor 1 is restarted by the instruction of the controller EC, and the elevator list 22 rises. → When the upper limit switch 31 of the sheet 34 is turned on, the list 22 stops rising. By this repetition, copy paper can always be fed little by little from the fixed position one by one according to the used amount.

(Paper Feeding / Supplying Operation) The operation at the time of sheet feeding will be described with reference to FIGS. 1, 2 and 6. FIG. When all the sheets 34 on the list 22 are conveyed from the upper surface of the list 22 by the home position feeding operation, the sheet detection limit switch 3
2 turns off. → The motor 1 starts in the CW direction according to the instruction from the controller EC. → The list 22 descends.
→ The lower limit switch 33 turns ON. → Motor 1
Stops. → The list 22 stops at the lowest position.
At this lowest position, the paper 34 is put on the list 22 and replenished. → After the setup is completed, press the start button switch 35 on the controller EC side. → Motor 1 is CC
Start in the W direction. → The list 22 rises. → Paper 3
4 rises with list 22 and upper limit switch 31
Turn ON. → Stop motor 1. → The list 22 stops, and the operation of feeding the copy paper is completed.

(Initial Setting Operation) The initial setting operation of the paper supply device will be described with reference to FIG. Main unit power ON
Sometimes the initial setting operation is performed when restarting after an emergency stop. OFF of lower limit switch 33 and paper detection switch 32
The initial setting operation is performed when is turned on. Motor 1
Start in the W direction. → The list 22 descends. → The lower limit switch 33 turns ON. → Stop motor 1. → The list 22 stops at the lowest position. At this position, the motor 1 is again set to C
Start in the CW direction. → The list 22 rises. → The paper 34 rises with the list 22 and the upper limit switch 3
Turn 1 ON. → Stop motor 1. → List 22
Stops. The list 22 after the ascending is stopped, and the copy paper initial setting operation is completed.

In the above-described embodiment, an example in which the paper supply apparatus of the present invention is used for a copying machine or a printer has been described. However, the present invention is not limited to this, and may be used for various other paper surface recording apparatuses. be able to.

[0035]

As described above, according to the present invention, since the feed synchronizing means is provided, it is possible to synchronize the feed of the belt member between the seventh pulley and the eighth pulley, and accordingly, , The horizontal stability along the direction in which the seventh and eighth pulleys are arranged, that is, along the paper supply direction, can be reliably maintained. In addition, since the left and right feed synchronizing means is provided, the fifth and sixth pulleys provided on each of the left and right side surfaces can be synchronously rotated in the left and right directions in the width direction.
Therefore, horizontal stability in the left and right directions in the list width direction perpendicular to the paper supply direction can be reliably maintained.

Further, the wrist has a structure in which the wrist is suspended at four points by a belt member extending downward from the first pulley and the second pulley provided in the left and right directions, so that the load balance is improved. Also, the wrist ribs can be made smaller. Further, the configuration of the four-point suspension as described above is effective to hold the wrist horizontally, and it is not necessary to provide the guide rails and the guide rollers with high accuracy as in the related art, so that the configuration can be simplified. The speed reduction mechanism of the present invention is a differential pulley speed reduction mechanism that does not use gears. In this differential pulley reduction mechanism, noise generated by the pulley and the belt is very small as compared with a reduction mechanism including a spur gear and a worm gear. Therefore, the speed reduction mechanism of the present invention is a low-noise speed reduction mechanism, so that the noise is reduced at the time of ascending and descending at a high speed. For example,
The noise is very low when the list is lowered at high speed during initial setting and when replenishing paper.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a configuration of a differential pulley speed reduction mechanism of a paper feeding apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory view of the elevating operation of the paper supply device of the present invention.

FIG. 3 is an explanatory diagram of a usage example of the paper supply device of the present invention.

FIG. 4 is an explanatory diagram of a differential pulley speed reduction mechanism.

FIG. 5 is an explanatory diagram of a differential pulley speed reduction mechanism.

FIG. 6 is an explanatory diagram of the operation of the differential pulley speed reduction mechanism of FIG. 1;

FIG. 7 is an explanatory diagram of a configuration of a speed reduction mechanism including a worm gear, a spur gear, and the like of a conventional paper feeding apparatus.

[Explanation of symbols]

 Reference Signs List 1 motor 2 motor pulley 3 motor timing belt 4 pulley 5 shaft 6, 6L differential pulley 7, 7R, 7L pulley (sixth pulley) 8, 8R, 8L timing belt 9, 9L differential pulley 10, 10R, 10L pulley (fifth pulley) 11 shaft 12 timing belt (belt member) 13, 13R, 13L pulley (ninth pulley) 14, 14R, 14L pulley (fourth pulley) 15, 15R, 15L pulley (second) , 16R, 16L pulley (eighth pulley) 17, 17R, 17L pulley 18, 18R, 18L pulley 19, 19R, 19L pulley (seventh pulley) 20, 20R, 20L pulley (first pulley) ) 21, 21R, 21L pulley (third pulley) Lee) 22 list 23,23R, 23L timing belt 24,24R, 24L pulley 25,25R, 25L pulley 30 frames 34 form EC controller

Claims (1)

(57) [Claims] 1. A wrist on which an upper surface is substantially flat and paper is placed on the upper surface, a frame surrounding the wrist so that the wrist can move up and down, and each pulley operates in substantially the same plane; And a differential pulley deceleration mechanism for moving the paper up and down in the frame while supporting the paper from the side, and feeding the paper to the paper surface recording device. First and second pulleys movably provided; third and fourth pulleys rotatably provided at two horizontally separated portions below the frame; and the third and fourth pulleys below the frame. 5th and 6th pulleys provided between the 4 pulleys, and are horizontally separated from the wrist supporting side surface, and
And two locations located inside the location where the second pulley is provided and seventh and eighth locations located at the center location of the two locations.
And a ninth pulley, which is wound around the first pulley and travels downward to the seventh pulley, and travels through the seventh pulley toward the eighth pulley in one direction substantially along the wrist side surface. ,
Via the eighth pulley, upward toward the second pulley, wrapping around the second pulley, downward toward the fourth pulley, and via the fourth pulley to the wrist side surface Along the other direction along the sixth pulley, and the ninth upward through the sixth pulley.
Toward the fifth pulley, winding downward around the ninth pulley, toward the fifth pulley, passing through the fifth pulley in the other direction toward the third pulley, and moving toward the third pulley. And a belt feed synchronizing means for synchronizing the feed of the belt member between the seventh pulley and the eighth pulley with the belt member heading upward via the first pulley in the paper supply direction. Peripheral speed difference driving means disposed on the right and left sides in the width direction of the wrist and driving the fifth and sixth pulleys so as to cause a difference in the respective peripheral speeds are disposed on at least one of the left and right sides in the width direction of the wrist. A differential pulley decelerating device, comprising: a left and right feed synchronizing means for synchronously rotating the fifth and sixth pulleys arranged on each of the left and right side surfaces in the width direction left and right. Machine Sheet feeding apparatus having a.