JPH066111Y2 - Sheet feeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a sheet feeding device attached to a printer, a typewriter, a copying machine, or the like.

[Conventional technology]

Generally, a printing device such as a printer or a typewriter is supplied with a sheet to be printed from a sheet supply device. This sheet feeding device is attached to the feeding / discharging port of the printing device, and feeds the paper stacked on the hopper to the platen of the printing device by the paper feed roller, and ejects the paper printed on this platen to the paper ejection roller. It is designed to be accommodated in a paper output stacker through the paper guide.

In such a sheet feeding device, the hopper is rotated around the shaft toward the sheet feeding roller by operating the set lever, and the sheet feeding roller is fed by the restoring force of the coil spring stretched between the fixed portion and the hopper. It is designed to be pressed against.

[Problems to be solved by the device]

As described above, the vertical movement of the hopper is performed by the rotation of the set lever, but a mechanism for transmitting the movement of the set lever to the hopper and vertically moving the hopper in a laterally balanced manner is complicated.

[Purpose of device]

An object of the present invention is to obtain a sheet feeding device capable of vertically driving a sheet stacking portion such as a hopper with a simple structure.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the sheet feeding device 3 is attached to the feeding / discharging port 2 of the printing device 1.

The printing device 1 includes a platen 5 attached to a platen shaft 4.
A head carriage 6 capable of reciprocating laterally along the platen 5, a print head 7 attached to the head carriage 6, a guide 8 and a pinch roller 9 provided along the peripheral surface of the platen 5. , 10 and.

On the other hand, the sheet feeding device 3 has arcuate support parts 12 fitted to the platen shaft 4 as shown in FIG. 1 on side frames 11L and 11R as device immovable parts on both sides shown in FIG. ing.

Further, inside the side frames 11L and 11R, a lock lever 13 is supported by a shaft 14 at an intermediate portion. The lock lever 13 is for fixing the sheet feeding device 3 to the platen shaft 4, and has an engaging portion 15 that engages with the platen shaft 4 at one end.

Between the side frames 11L and 11R, an L-shaped guide 33 is attached in the middle and a shaft 16 is attached to the rear.
As shown in FIG. 2, sheet stacking units, for example, hoppers 19L and 19R as a pair of partial mounting members are rotatably attached to the shaft 16 via bearings 20L and 20R. The hopper 19R is movable in the length direction of the shaft 16. Also, as shown in FIGS. 2 and 4,
The hopper 19L partially enters under the hopper 19R to form an overlapping portion. The hopper 19R is provided with a holder 55 having a hole 51 as shown in FIG.

The hoppers 19L and 19R are provided with side plates 22L and 22R on one side, respectively, as shown in FIG. These side plates 22L and 22R have cutout portions 25L and 2L.
5R is provided, and separation levers 27L and 27R having separation claws 26L and 26R are rotatably supported by shafts 28L and 28R.

Further, a paper feed frame 31 is provided on the rear back of the hopper 19R.
Is detachably attached.

Below the hoppers 19L and 19R, a rod 59, which is a rod member, is provided through the hole 51 of the holder 55. The rod 59 is provided with an abutment member 34 (for example, a mold component) that can come into contact with the bottom surface of the hopper 19L in the middle, one end thereof is supported by the frame 11R via a bearing 81, and the other end is vertically movable. A pin 57 is provided at the other end of the rod 59, that is, at the vertical movement support end.

Then, with one end of the rod 59 being supported by the frame 11R as a bearing, the vertical movement supporting end at the other end is moved up and down to bring the contact member 34 into contact with and separate from the hopper 19L, and the hoppers 19L, 19L.
Operation means 53 for moving the R up and down is provided.

As shown in FIG. 3, the operating means 53 of the urging means includes an L-shaped arm 70 as an urging force transmitting member, a set lever 17 as an operating member, and a spring 61 as an urging means. The rod 59 is pushed down by the rotation of, or the pushing down is released and the rod 59 is pulled up.

The arm 70 has an engaging portion 60 that engages with the pin 57 at one end, a pin 63 at the other end, and an intermediate portion supported by a shaft 65. The set lever 17 has a pin 6 at one end.
3 is provided with an engaging portion 71 and a guide portion 72, and an intermediate portion is supported by a shaft 73. The spring 61 is stretched between the pins 75 and 77 as shown in FIG.

A feed means such as a paper feed roller 23 and sponge rollers 24L and 24R are attached to a rotary shaft 32 connected to the motor.

The paper feed roller 23 and the sponge rollers 24L, 24
The driving force of R may be obtained from the platen shaft 4 of the printing apparatus 1. Further, the feeding means is not limited to the rollers, but may be a belt or the like.

In front of the paper feed roller 23 and the sponge rollers 24L and 24R, a manual feed guide 35 and a paper discharge guide 36 are attached with a manual feed slit 37 formed. In addition,
A paper discharge frame 38 that holds the discharged paper is detachably attached to the manual feed guide 35.

A paper discharge roller 40 is attached to a drive shaft 39 above the paper discharge guide 36, and a paper discharge guide 42 that rotates around a shaft 41 is provided.
At the same time, the paper is guided to the frame 38 side.

In such a configuration, the device operates as follows.

When setting the sheets in the hoppers 19L and 19R, the set lever 17 is rotated clockwise from the state shown in FIG. As a result, the guide portion 72 contacts the pin 63 and the arm 70 is driven counterclockwise. When the pin 63 engages with the engaging portion 71, the rod 59 is pushed down as shown in FIG. Therefore, as shown in FIG. 4, the rod 59 hits the edge of the hole 51 of the holder 55, and the hoppers 19L and 19R are pushed down. In such a state, the hopper 19R is moved along the shaft 16 to have a width according to the paper size.

When the position of the hopper 19R is determined according to the paper size and the paper is set, the side plates 22L,
It is supported by 22R. When the set lever 17 is rotated counterclockwise in FIG. 3 in such a state, the pin 63 is disengaged from the engaging portion 71, and the restoring force of the spring 61 causes the arm 70 to move.
Rotates clockwise and the rod 59 is pushed up. Therefore, the contact member 34 hits the bottom surface of the hopper 19L and pushes up the hoppers 19L and 19R. Therefore, the hopper 19
The sheets on L and 19R are pressed against the sheet feed roller 23.

In such a state, when a printing command is given to the printer 1 from a computer or the like, the rotary shaft 32 rotates and the sponge rollers 24L and 24R press the both sides of the paper, and the paper feed roller 23 sends out the paper. At that time, both front ends of the sheet are caught by the separation claws 26L and 26R, and when the sheet is bent and bounces beyond a certain limit, the sheet is separated into one sheet, and the sheet is passed between the guide portion 33 and the manual feed guide plate 35.
And the guide 8 are supplied.

When the print is wound around the platen 5 by the print head 7, the print is guided by the paper discharge guide 42 and discharged by the paper discharge guide 42 and the paper discharge roller 38.

In this way, when the sheets stacked on the hoppers 19L and 19R decrease and the sheets run out or the size is changed, the set lever 17 is rotated to push down the rod 59.

According to this embodiment described above, the following effects can be obtained.

Below the hoppers 19L and 19R, a rod 59 having an abutting member 34 capable of contacting the bottom surface of the hopper 19L is provided in the middle through the hole 51 of the holder 55, and one end of the rod 59 is mounted on the frame 11R via the bearing 81. And the other end is movable up and down, and one end of the rod 59 is connected to the frame 11
While being supported by R, the other end is moved up and down by the operating means 53 to bring the contact member 34 into contact with and separate from the hopper 19L.
Since the L and 19R are moved up and down, the hopper 19
It is possible to move the hops 19L and 19R up and down in a laterally balanced manner without providing a complicated vertical movement mechanism below the L and 19R. Therefore, it is possible to obtain the sheet feeding device which is easy to assemble and inexpensive.

[Modification]

Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and the following modifications can be made.

In the embodiment, one end of the rod 59 is supported by the fixed bearing 81, but the bearing that supports one end of the rod 59 is the rod 5.
It may be rotated up and down by the vertical movement of the other end of 9.

[Effect of device]

As described above, according to the present invention, the sheet stacking portion that is supported so as to be vertically swingable, the feeding means that is rotatably provided above the sheet stacking portion, and the sheet stacking portion A sheet that is attached to the sheet feeding port of the printing device and is urged toward the feeding device, and the sheet placed on the sheet stacking portion is directed to the platen of the printing device by the feeding device. The sheet stacking unit is configured by a pair of partial mounting members that are movable in the sheet width direction according to the sheet width, and the sheet mounting bottom surface of each partial mounting member is the sheet width. Irrespective of the above, at least a part thereof has an overlapping portion that overlaps with each other, and is provided below the sheet stacking portion, and has one end bearing-supported
The other end is vertically supported, and the biasing force of the biasing means is transmitted to the sheet stacking unit when the vertical motion support end side is pulled upward to a position facing the overlapping portion of the partial placement member. A rod member provided with an abutting member, one end of which engages with the vertical movement supporting end side of the rod member and the other end of which is coupled to the biasing means, and the biasing force of the biasing means is brought into contact with the rod member. A biasing force transmitting member that transmits the biasing force to the sheet stacking unit by a member, and the biasing force transmitting member that engages with the biasing force transmitting member at any time to pull down the vertical movement support end of the rod, and release the biasing force to the sheet stacking unit. Since the operation means of the biasing means composed of the action member is provided, the number of members is small and the construction is simple, and the vertical movement operation of the sheet stacking portion is easy, and the sheet is pressed against the feeding means. Left and right bias In all, it is possible to prevent skew feed and paper feed error from occurring.

[Brief description of drawings]

1 to 4 are views showing an embodiment of the present invention.
FIG. 3 is a sectional view showing the overall structure of the sheet feeding apparatus, FIG. 2 is a plan view showing the structure centering on the hopper, FIG. 3 is a sectional view showing the structure of the operating means, and FIG. 4 is a vertical movement mechanism of the hopper. FIG. 1 ... Printing device 2 ... Feeding / discharging port (sheet feeding port) 3 ... Sheet feeding device 5 ... Platen 11L, 11R ... side frame (device immovable part) 17 ... Set lever (acting member) 19L, 19R ... Hopper (sheet stacking part) (partial placement member) 23 ... Paper feed roller (feeding means) 24L, 24R ... Sponge roller (feeding means) 34 ... Contact member 53 ... Operation Means (operating means for biasing means) 57 ... Pin (upward / downward supporting end of rod member) 59 ... Rod (rod member) 61 ... Spring (biasing means) 70 ... L-shaped arm (biasing force transmitting member) ) 81 …… Bearing

Claims (1)

[Scope of utility model registration request] 1. A sheet stacking portion supported so as to be vertically swingable, a feeding means rotatably mounted above the sheet stacking portion, and the sheet stacking portion facing the feeding means. A sheet feeding device that is equipped with a biasing unit that is attached to a sheet feeding port of a printing apparatus, and that feeds a sheet placed on the sheet stacking unit toward the platen of the printing apparatus by the feeding unit. In the above, the sheet stacking portion is composed of a pair of partial placement members that are movable in the sheet width direction according to the sheet width, and the sheet placement bottom surface of each partial placement member is at least partially irrespective of the sheet width. Has an overlapping portion that overlaps with each other, is provided below the sheet stacking portion, and has one end bearing-supported,
The other end is vertically supported, and the biasing force of the biasing means is transmitted to the sheet stacking unit when the vertical motion support end side is pulled upward to a position facing the overlapping portion of the partial placement member. A rod member provided with an abutting member, one end of which engages with the vertical movement supporting end side of the rod member and the other end of which is coupled to the biasing means, and the biasing force of the biasing means is brought into contact with the rod member. A biasing force transmitting member that transmits the biasing force to the sheet stacking unit by a member, and the biasing force transmitting member that engages with the biasing force transmitting member at any time to pull down the vertical movement support end of the rod, and release the biasing force to the sheet stacking unit. A sheet feeding device, comprising: an urging means operating means including an operating member.