JPH033826A - Sheet feed device - Google Patents

Abstract

PURPOSE:To separately feed both common sheets and thick sheets, and positively guide both side ends of the thick sheets by permitting side guide members for guiding both the side ends of the thick sheets to be freely loaded and unloaded, and allowing the distance between the guide members to be freely changed. CONSTITUTION:When thick sheets 4b are supplied and fed, side guide members 8 for the thick sheets are mounted onto loading plates 3, the thick sheets 4b are laminated and loaded on loading parts 8a1, 8b1 of the loading members 8, and a right guide member 8b is slid to a left guide member 8a to guide guide parts 8a2, 8b2 so that these guide parts abut against respectively both side ends of the thick sheets 4b. At this time, the side guide members 8 are positioned so as for the thick sheets 4b fed from the side guide members 8 to pass through the slits 6c of separating claws 6. When a shaft 9 is rotated in this state, driving force is given to the recording sheet 4b by means of the arc parts 5b of feeding rollers 5 in the same manner as the case of feeding common sheet 4a.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a sheet 1-feeding device that separates and feeds a plurality of stacked sheets 1- one by one using a separating claw.

<Prior art> In a recording device such as a printer or a copying machine, or a document reading device, a feeding system is used to separate and feed sheets one by one from sheets 1 to 1 (recording paper, manuscripts, etc.) loaded with a plurality of sheets. Many use a device (so-called cut sheet feeder).

There are various types of sheet separation mechanisms for the feeding device, and a typical one uses separation claws. As shown in FIG.
By pressing the stacking plate 50 with the pressing spring 53, the top layer sheet I 51 is brought into pressure contact with the feeding roller 54, and when this feeding roller applies a feeding force to the top layer sheet, the top layer sheet I. The sheets 51 form a loop between the separating claw 52 and the feeding roller 54, and with their "strength", they overcome the separating claw 52 and are separated and fed one by one.

However, if the sheet is thick, the stiffness of the sheet will be strong and the sheet I will not be able to get over the separating claws 52. Therefore, conventionally, when separating and feeding postcards as thick sheets, for example, a sheet boulder dedicated to postcards with a separation mechanism was set, and the boulder was used to separate and feed postcards on both sides of the postcard.
・The paper was separated and fed while being guided.

<Problems to be Solved by the Invention> However, since the distance between the left and right zeitgeite is fixed to a fixed length in the sheet holder, taking into account the dimensional tolerance of postcards (generally ±1.5 nun), Play may occur between the side edge and the night guide.
Postcards were sometimes not set in the correct separation position.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems and to provide a feeding device that can reliably guide both sides of a thick sheet and reliably set it in the proper position relative to the separation claw of the device. It is.

<Means for Solving the Problems> A typical means of the present invention for solving the above problems includes a placing member for placing a sheet, and an uppermost layer of sheets laminated on the placing member. a separating claw which has a claw part that presses the two sides of the sheet located on the top layer, an abutting part against which the front end of the seat 1 abuts, and a slit formed between the claw part and the abutting part; a feeding means for applying feeding force to the sheet; and a feeding means that is removable from the mounting member,
The present invention is characterized in that it has a thick sheet side guide I member having guide portions for guiding both side ends of the thick sheet, and the guy I portion of the thick sheet side guide member is configured to be slidable in the sheet width direction.

<Function> In the above means, when ordinary sheets are stacked on the placing member, the ordinary sheets I. are separated and fed so as to pass over the separating claws.

In addition, when feeding a thick sheet 1-, attach the thick sheet side guide members to the equipment described above (J), and insert the thick sheet so that both ends of the thick sheet are guided by part of the guide 1. At this time, the front guide part slides in the sheet width direction.
Since this is possible, there is no looseness between the both ends of the thick sheet and the guide portion, and the thick sheet can be reliably set in the proper position.

<Example> Next, an example of a recording apparatus to which the above-mentioned means is applied will be described.

FIG. 1 is a perspective explanatory view of the sheet 1 to the feeding device according to the present embodiment, and FIG. 2 is an explanatory view of feeding a normal sheet.
FIG. 3 is an explanation of feeding a thick sheet.

First, to explain the overall general structure, a mounting plate 3 biased in both directions by pressing springs 2 is housed inside a frame 1.
When a large number of sheets of plain paper (4a) such as plain paper are loaded on this mounting plate 3 and the feeding roller 5 is rotated in the direction of the arrow in FIG. The structure is such that the paper is separated by a roller 7 and fed to a conveyance roller 7. Also, on the mounting plate 3, there is a side guide member 8 for thick sheets.
is removable, and when feeding the thick seam 1-4b, by attaching the side guide member 8, the conveying roller 7 is guided by the side guide members 8 on both sides of the thick seam 4b. It is configured so that it can be fed to. The side guide member 8 is a guide portion 8 a2+ 8 for guiding both ends of the thick seam I.4b.
bz is formed, and is configured such that the interval between both guide portions 8az8b2 can be varied.

Next, to specifically explain the structure of each part, the frame body 1 is divided into a left half part 1a and a right half part 1b, and by sliding them along an axis 9, the frame body 1 can be adjusted in the entire width direction of the seat. is now possible. Further, the above-mentioned placing plate 3 is also housed separately in the left and right frames 1a and 1b, and each placing plate 3 is urged upward by the pressing spring 2, whereby the ordinary sheets 4a loaded on the placing plate 3''. The uppermost layer is configured to come into pressure contact with the feeding roller 5. Furthermore, the left and right frame bodies 1
On the outer wall portions of a and 1b, normal sheet guides 10 are provided to guide both ends of the normal sheet 1-4a, and are configured to guide both ends of the normal sheet 4a to be fed. There is.

Next, as shown in FIG. 1, the feeding roller 5 is integrated with the shaft 9 by fitting the projection 5a of the roller 5 into the groove 9a formed in the shaft 9 to which the driving force from the motor (not shown) is transmitted. Although it rotates, it is attached so that it can slide in the thrust direction, and is configured so that it can be set at an appropriate position depending on the width of the seats 1-4a and 4b to be set.

Further, the outer peripheral portion of the feeding roller 5 is made of a high-friction member such as rubber, and has an arc portion 5b and an arc portion 5C having a diameter shorter than the diameter of the arc portion 5b, as shown in FIG. When the feed roller 5 rotates, the arc portion 5b comes into pressure contact with the sear 1-4a4b, and the arc portion 5c contacts the sear 1-4a4b.
4a and 4b are configured to be separated from each other.

Next, the separation claws 6 will be explained. In this embodiment, the separation claws 6 are formed integrally with the frame body 1, and are respectively formed on the sheets 4a and 4a.
4b, and an abutting part 6b against which the leading edge of the sheet abuts, and a sulin) 6c is formed between the claw part 6a and the abutting part 6b. There is. This slit 6C is formed to approximately half the width of the claw portion 6a, and when the thick sheet 4b is set with the Zide guide portion 118 of the thick sheet 4b attached, the uppermost layer of the thick sheet 1-4b. Although the front end corner portion is pressed by the claw portion 6a of the separation claw 6, the sheet front end is configured to have a shape and size that allows it to smoothly advance straight in the feeding direction through the pickpocket/1/6C without hitting the contact portion 6b. has been done.

Further, as shown in FIG. 4, the slit 6c has a projected dimension Ll in the traveling direction of the sea 1- to be fed, and the 12. It has a projected dimension formed in a direction different from that, that is, a distance L2 between the claw portion 6a and the abutment portion 6b, and the distance 2 is larger than Ll. Furthermore, the projected dimension L+ in the sheet advancing direction and the thickness L3 of the thick sheet l-4b to be fed.
The vertical projected dimensions 1 and 2 of the claw portions 6a are set to be larger than the thickness L3 of the thick sheet 4b.

Next, the side guide member 8 of the thick seam 1-4b will be explained.As shown in FIG.
a and a right guide member 8b, and a left guide member 8a
A sheet placing portion 8a+ and a guide portion 8az are formed at the side ends thereof, and a fitting hole 8as is formed in the sheet placing portion 8a+ as shown in FIG. Further, the right guide member 8b similarly has a seal l-resting part 8b+ and a guide part 8bz formed at the side end thereof, and a fitting part 8b3 is formed in a part of the seal l-resting part 8b+, This is fitted into the fitting hole 8a3 in a slidable and non-removable manner.

Therefore, the guide portions 8 of the left and right guide members 8a, 8b
The distance between ``2+8 bz'' is constructed so that the distance β shown in FIG.

Next, an explanation will be given of the operation when feeding a sheet using the apparatus configured as described above.

First, when feeding the normal sheet 4a, remove the side guide member 8 as shown in FIG.
4a is placed on the mounting plate 3, and set by abutting the side edges 0 on both ends thereof. When the shaft 8 is rotated in the direction of the arrow in FIG. 2 in this state, the arc portion 5b of the feeding roller 5 rotates in pressure contact with the sheet 4a, and a propulsive force is applied to the uppermost sheet 4a. At this time, since the leading end of the sheet 4a is in contact with the abutting portion 6b of the separation claw 6, the separation claw 6 and the feeding row 5
A loop is formed between them, and once the loop has been formed to a certain extent, the leading edge of the sheet comes off from the separation claw 6 due to the "strength" of the sheet 1-4a, and the top recording sheet 4a is separated from the separation claw 6. and is fed to the conveyance roller 7.

As described above, after the sheet 4a is nipped by the conveying roller 7 which is driven and rotated by a motor (not shown) and the pinch roller 7a which is in pressure contact with the roller 7 and rotates as a result of the rotation, the sheet 4a is conveyed to a predetermined recording section etc. by the conveying roller rough. However, at this time, the arc portion 5c of the feeding roller 5 faces the sheet 4a and is separated from the sheet 1-48.

Next, the case of feeding the thick seams 1-4b will be explained. In this case, as shown in FIG. Place the receipt 4b on the receiving section 8a+ and 8b+ of 8.
The sheets are stacked one on top of the other, and the right guide member 8b is slid against the left guide member I/member 88, and the guide portions 8az and 8b2 are brought into contact with both ends of the thick sheet 4b to guide it. The site guide member 8 is positioned so that the thick sheet 4b fed from the side guide member 8 passes through the slit 6C of the separating claw 6.

When the shaft 9 is rotated in the above state, a propulsive force is applied to the recording sheet 4b by the arc portion 5b of the feeding roller 5, as in the case of feeding the normal sheet 1-4a.

At this time, as shown in FIG. 6, since the dimensions of the separation claw 6 are set as described above, the sheet 4b of the uppermost layer lightly hits the two ends of the abutment part 6b, and the abutment part Only one sheet of the top layer is separated as it escapes upward from the top layer 6b, and is fed into the nip between the conveyance roller 7 and the pinch roller 7a through the sling 6c of the separation claw 6.

As mentioned above, the guide portion 8az of the side guide member 8
8bz is made variable, both ends of the thick sheath) 4b are reliably guided, and the sheath) 4b and the guide portion 8a2. It is possible to prevent a feeding failure in which the thick sheet 4b comes off from the claw portion 6a of the separation claw 6 due to rattling with the separation claw 6.

In addition, since the left guide member 8a and the right guide part +J13b cannot be removed, the site guide member 8 is configured as a side guide unit, and can be easily loaded onto the mounting plate 3, and the guide 1- on one side cannot be removed. There's nothing to do.

In the above embodiment, the left guide member 8a and right guide member 8b of the sight guide member 8 were made inseparable, but as shown in FIG. It may be configured by separating into two parts. If this is done, the side guide members 8 must be attached and detached separately from each other on the mounting plate 3, making it somewhat inconvenient to use, but the distance between the guide parts 80 of the left guide member 8a and right guide member 8b can be adjusted The possible dimensions become wider.

Further, in the above embodiment, an arcuate roller was used as the feeding roller 5, but a regular circular roller may also be used.

Further, in the above-mentioned embodiment, an example was shown in which the separation claw 6 was formed integrally with the frame 1, but only the claw portion 6a was formed integrally with the frame 1, and the abutment made of a separate member from the claw portion 6a was shown. The portion 6b may be attached to the frame 1 using screws or the like. In this way, it is possible to easily improve the precision of the dimensions and shape of the sulin (6c), which is difficult to obtain with precision by integral molding by bending, by determining the dimensions with the positional precision of two parts.

<Effects of the Invention> As described above, the present invention has a structure in which the sight guide members for guiding both ends of a thick sheet are removable, and the distance between the guide parts is variable, so that the Zyde guide' member can be attached and detached. By doing so, both the normal sheet and the thick sheet can be fed separately, and both ends of the thick sheet can be reliably guided, so that reliable feeding can be performed.

[Brief explanation of drawings]

Fig. 1 is a perspective explanatory view of a sheet 1-feeding device according to an embodiment of the present invention, Fig. 2 is an explanatory view when feeding a normal sheet, and Fig. 3 is an explanatory view when feeding a thick sheet. Explanatory diagram of the case, 4th
FIG. 5 is an explanatory diagram of the structure of the separating claw, FIG. 5 is an explanatory diagram of the sliding structure of the thick sheet side guide member, FIG. 6 is an explanatory diagram of the sheet feeding state, and FIG. 7 is an explanatory diagram of another embodiment. 8th
The figure is an explanatory diagram of the prior art. 1 is a frame body, 1a is a left half part, 1b is a right half part, 2 is a pressing spring, 3 is a mounting plate, 4a, 4b are seats 1-15 are feeding rollers, 5a is a projection part, 5b is an arc part , 5C is an arc, 6 is a separating claw, 6a is a claw, 6b is an abutment, 6c is a slit, 7 is 1
General feed roller, 7a is a pinch roller, 8 is a site guide member, 8a is a left guide member, 8a+ is a mounting part, 8az is a guide part, 8a3 is a fitting hole, 8b is a right guide member, 8b,
8bz is a mounting portion, 8bz is a guide portion, 8b3 is a fitting portion, 9 is a shaft, 9a is a groove portion, and 10 is a side guide.

Claims (1)

[Scope of Claims] A mounting member for mounting a sheet, a claw portion for pressing the top surface of the uppermost sheet of the sheets stacked on the mounting member, and an abutting portion against which the front end of the sheet abuts. , a separating claw having a slit formed between the claw part and the abutting part; a feeding means for applying feeding force to the sheet in the uppermost layer; and a thick sheet side guide member having a guide portion that guides both ends of the thick sheet, and the guide portion of the thick sheet side guide member is configured to be slidable in the width direction of the sheet. sheet feeding device.