JPH05301653A - Paper feeding device - Google Patents

Abstract

PURPOSE:To enable the stable conveyance of sheets regardless of the thickness. CONSTITUTION:In the case of a thin sheet 27 being fed in, a stepping clutch 23 is turned on, so that the torque of a driving motor 24 is transmitted to cams 15, 16, and the cams 15, 16 are displaced from the top dead center to the bottom dead center. At this time, an upper guide plate 12 is lowered into the lowest position, so that a space (d) between the upper guide plate 12 and a lower guide plate 11 is narrowed. The thin sheet 27 is thereby conveyed in a stable posture without bending.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeding device used in a paper folding machine or the like, and more particularly to a paper feeding device for feeding various kinds of papers having different thicknesses into a paper feeding path.

[0002]

2. Description of the Related Art In a copying machine for copying a large original such as a drawing original, it may be copied on a large-sized copying paper such as A0 or A1, and these copying papers are folded into a desired size by a paper folding machine. Be done. This paper folding machine usually has two folding parts. If one is the first folding portion and the other is the second folding portion, the sheet is folded in the first direction at the first folding portion, and the sheet is folded at the second folding portion which is orthogonal to the first direction at the second folding portion. It folds in the direction. A direction changing portion is provided between the first folding portion and the second folding portion, and after aligning the end portions of the paper fed from the first folding portion with the resist portion (stopper), It is designed so that it is turned 90 degrees toward the second folding portion and sent out.

[0003]

By the way, in such a paper folding machine, there are different folding modes such as cross folding and fan folding, and the paper size is A1 portrait, A1 landscape, A2 portrait, A2 landscape. , A3 length, A3 width, etc., there are many types of different thicknesses in the paper transport path between the first folding section and the registration section and between the registration section and the second folding section. Paper is fed. Conventionally, the interval between the upper guide plate and the lower guide plate that configures the paper transport path is set according to the paper having the maximum thickness and is fixed at this interval. Therefore, in the case of thick paper, the posture is stably conveyed, and the registration adjustment is performed well.

However, when the thickness of the fed paper is thin, the paper is bent between the upper guide plate and the lower guide plate and the posture is not stable, so that the paper cannot be stably conveyed, and There is a problem that the resist accuracy becomes poor.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a paper feeding device capable of stably feeding a paper regardless of its thickness.

[0006]

SUMMARY OF THE INVENTION A paper feeding device according to the present invention comprises a paper feed path constituted by an upper guide plate and a lower guide plate, a paper feed means for feeding paper in the paper feed path, and The apparatus further includes a conveyance path distance adjusting means for adjusting the distance between the upper guide plate and the lower guide plate according to the thickness of the paper conveyed by the paper conveying means.

In this paper feeding device, since the distance between the upper guide plate and the lower guide plate is adjusted by the conveyance path distance adjusting means, the paper can be stably conveyed regardless of its thickness.

Further, in the paper feeding device according to the present invention, it is constituted by the upper guide plate and the lower guide plate, and
Depending on the thickness of the sheet conveyed by the sheet conveyance path having a registration adjustment unit for adjusting the registration of the fed sheet, the sheet conveyance unit for conveying the sheet toward the registration adjustment unit, and the thickness of the sheet conveyed by the sheet conveyance unit. It is also possible to adopt a configuration including a conveyance path interval adjusting means for adjusting the interval between the upper guide plate and the lower guide plate.

In this paper feeding device, since the distance between the upper guide plate and the lower guide plate is adjusted by the conveyance path distance adjusting means, the paper can be stably conveyed regardless of its thickness. The resist accuracy in the resist adjusting means is also improved.

The conveyance path interval adjusting means supports, for example, the upper guide plate and has a cam mechanism having a cam capable of setting the height of the upper guide plate in a plurality of steps.
The cam can be constituted by a cam driving means for rotationally displacing the cam according to the thickness of the paper. A first position between the upper guide plate and the lower guide plate and a position above the upper guide plate are passed through a pair of openings formed in the upper guide plate in a longitudinal shape and parallel to each other in the sheet conveying direction. Second
And a movable member for forming a conveying path that is displaceable between the movable member and the upper guide plate, and the movable member for forming a conveying path is arranged at the first position or the first position according to the thickness of the sheet. It may be configured by a driving unit which is set to the position 2.

[0011]

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

FIG. 1 and FIG. 2 each show a side structure of a paper feeding device according to a first embodiment of the present invention.
Here, FIG. 1 shows a configuration for carrying a thick paper 26, and FIG. 2 shows a configuration for carrying a thin paper 27.

In this paper feeding device, a paper transport path 13 is constituted by an upper guide plate 11 and a lower guide plate 12. The sheet 27 is conveyed in the sheet conveying path 13 by a pair of conveying rollers (not shown). A stopper 14 for adjusting the resist is arranged at one end of the paper transport path 13. The registration of the paper 27 is adjusted by abutting the tip of the paper 27 against the stopper 14. The lower guide plate 12 is installed on the support stand 17. The cams 15 are provided at both ends of the support base 17 in the longitudinal direction.
16 are provided so as to be rotatable around shafts 15a and 16a, respectively. Although not shown, these cams 15,
16 are also symmetrically provided on the opposite side of the paper transport path 13, and a pair of each is provided. The upper guide plate 12 is supported by the two pairs of cams 15 and 16.

A pulley 18 is attached to the shaft 15a of the cam 15 and a pulley 19 is attached to the shaft 16a of the cam 16. A stepping clutch 23 is arranged in the lower center of the support base 17, and a pulley 20 is attached to a rotation shaft 23 a of the stepping clutch 23. A transmission belt 21 is wound around the pulleys 18, 19 and 20. A pulley 22 is further attached to the rotary shaft 23a of the stepping clutch 23.
A drive motor 24 is arranged adjacent to the stepping clutch 23. A pulley 26 is attached to the rotary shaft 24 a of the drive motor 24, and a transmission belt 25 is wound between the pulley 26 and the pulley 22.

That is, in this paper feeding device, the rotational force of the drive motor 24 is transmitted to the pulley 22 via the pulley 26 and the transmission belt 25, and the stepping clutch 23.
Is transmitted to the rotary shaft 23a. Further, this rotational force is transmitted from the rotary shaft 23a of the stepping clutch 23 to the pulleys 18 and 19 via the pulley 20 and the transmission belt 21, whereby the cams 15 and 16 are rotated. Here, the stepping clutch 23 is
After the exit sensor (not shown) of the first folding section (not shown) detects the sheet 27, it is turned on after a certain period of time to transmit the rotational force of the drive motor 24 to move the cams 15 and 16 from the top dead center. After being displaced from the bottom dead center or from the bottom dead center to the top dead center, that is, after being rotated by 180 degrees, it is turned off to interrupt the transmission of the rotational force of the drive motor 24.

In this paper feeding device, when the thick paper 27 is fed from the first folding portion (not shown), the cams 15 and 16 are respectively set to the top dead center as shown in FIG. Therefore, the upper guide plate 12 is lifted to the uppermost position, and the distance d between the upper guide plate 12 and the lower guide plate 11 is widened. As a result, the thick sheet 27 can be conveyed, the resist is properly adjusted by the stopper 14, and then the sheet is sent to the second folding section (not shown).

In this state, when the thin sheet 27 is next fed from the first folding section, when the exit sensor (not shown) of the first folding section detects the sheet 27, the stepping clutch is reached after a certain period of time. 23 turns on. As a result, the rotational force of the drive motor 24 is transmitted to the cams 15 and 16, and the cams 15 and 16 are displaced from the top dead center to the bottom dead center. FIG. 2 shows the state at this time. At this time, the upper guide plate 1
2 is lowered to the lowest position, and the distance d between the upper guide plate 12 and the lower guide plate 11 is narrowed. As a result, the thin sheet 27 is conveyed in a stable posture without bending. Therefore, the resist adjustment in the stopper 14 is accurately performed.

3 to 5 show a second embodiment of the present invention.

In the present embodiment, a solenoid is used as a driving means for adjusting the interval d of the sheet conveying path 13. The same components as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In this embodiment, two support frames 41a and 41b are provided on the upper guide plate 12 along the paper transport direction.
Are arranged to face each other. These support frames 41
A pair of openings 31a and 31b are formed in parallel on the upper guide plate 12 between a and 41b. These openings 3
1a and 31b respectively include a movable member 32 for forming a conveyance path
a and 32b are arranged. Movable member 3 for forming a transport path
2a and 32b each have a flat bottom portion and side walls formed on both sides in the longitudinal direction, and the shafts 36a and 36b and the shaft 38 are provided between these side walls.
Each of a and 38b is rotatably supported. The end portions 43 of the transport path forming movable members 32a and 32b on the sheet carry-in side are bent upward as shown in FIG.

A solenoid 33 as a driving means is attached to one of the support frames 41a. Two shafts 37 and 40 are rotatably supported between the support frames 41a and 41a. The shaft 37 and the shafts 36a and 36b are connected by links 35a and 35b. Links 39a, 3 are provided between the shaft 40 and the shafts 38a, 38b, respectively.
They are connected by 9b. The tip of the drive link 34 of the solenoid 33 is connected to the intermediate portion of the link 35a. The drive link 35a is urged by the elastic force of the spring 42 to rotate clockwise about the shaft 37. The solenoid 33 is normally off, and at this time, the link 35a and the link 35
b, 39a, 39b rotate in the clockwise direction around the shafts 37, 40, respectively, and as shown in FIG. 4, the transport path forming movable members 32a, 32b are retracted from the paper transport path, respectively. The position is set on the guide plate 11 (second position). The solenoid 33 is turned on by a control unit (not shown) when the thin paper 27 is fed, and at this time, the link 35a,
35b, 39a, and 39b each rotate counterclockwise by a predetermined angle against the elastic force of the spring 42, and as a result, as shown in FIG.
The positions a and 32b are set to the positions (first positions) in the paper transport path 13. At this time, the paper 27 is
Lower guide plate 12 and movable members 32 for forming these transport paths
Since the sheet is conveyed between a and 32b, the space between the sheet conveying paths 13 is substantially narrowed.

In the present embodiment, when the folding mode of the sheet 27 is the feather folding (fan folding) mode and the number of folding at the first folding portion (not shown) is less than 3, the solenoid 33 is used.
When turned on, the transport path is formed by the transport path forming movable members 32a and 32b.

FIG. 6 is a flow chart for explaining the operation. That is, when the drive motor (not shown) for the paper transport path is changed from the off state to the on state (step S10).
0; Y), the control unit determines whether or not the number of foldings is three times or more (step S101). When the number of foldings is three times or more (Y), it is determined that the paper 27 is thick, and the solenoid 33 remains off. (Step S102). In this state,
As described above, the transport path forming movable members 32a and 32b are still set to the second position, and the sheet 27 is stably transported in the sheet transport path 13. On the other hand, when the number of folding is less than 3 (step S101; N), the paper 2
Assuming that 7 is thin, the solenoid 33 is turned on (step S103). In this state, the transport path forming movable members 32a and 32b descend from the second position as described above, and
Is set to the position. Therefore, the sheet 27 is transported between the transport path forming movable members 32a and 32b and the lower guide plate 12, and thus is transported in a stable posture without bending, and registration adjustment is performed. When the registration adjustment is completed, the control unit determines whether the above-described drive motor has changed from the on state to the off state (step S104),
If it is turned off (Y), the solenoid 33 is turned off (step S105). As a result, the transport path forming movable members 32a and 32b are returned to the second position to prepare for the next operation.

The present invention has been described with reference to the examples.
The present invention is not limited to the above embodiments, but can be variously modified without departing from the scope of the invention. For example,
In the first embodiment, the cam mechanism is used to switch the position of the upper guide plate 12 in two steps, that is, the uppermost position and the lowermost position. However, by changing the shapes of the cams 15 and 16, 3 You may make it switch more than a step. Further, in the above embodiment, an example in which the paper feeding device of the present invention is applied to a paper folding machine has been described, but it goes without saying that the present invention can be applied to all devices that convey various types of paper having different thicknesses. ..

[0025]

As described above, according to the paper feeding apparatus of the present invention, the distance between the upper guide plate and the lower guide plate can be adjusted by the conveyance path distance adjusting means.
There is an effect that the paper can be conveyed in a stable posture regardless of its thickness.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a configuration of a paper feeding device according to a first embodiment of the present invention when a thick paper is conveyed.

FIG. 2 is a cross-sectional view showing a configuration of the paper feeding device of FIG. 1 when conveying thin paper.

FIG. 3 is a plan view of a paper feeding device according to a second embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a configuration of the paper feeding device of FIG. 3 when carrying thick paper.

FIG. 5 is a cross-sectional view showing a configuration of the paper feeding device of FIG. 3 when a thin sheet is conveyed.

FIG. 6 is a flowchart for explaining the operation of the paper feeding device of FIG.

[Explanation of symbols]

11 ... Upper guide plate, 12 ... Lower guide plate, 13 ... Paper transport path, 15, 16 ... Cam, 23 ... Stepping clutch, 32a, 32b ... Transport path forming movable member

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[Procedure amendment]

[Submission date] February 19, 1993

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 6]

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Junichi Asaoka 3-7-1, Fuchu, Iwatsuki City, Saitama Prefecture Fuji Zerox Co., Ltd. Iwatsuki Plant (72) Hiroaki Mogi 3-7-1, Fuchu, Iwatsuki City, Saitama Prefecture No. Fuji Xerox Co., Ltd. Iwatsuki Works (72) Inventor Asari Sakurai 3-7-1 Fuchu, Iwatsuki City, Saitama Prefecture Fuji Xerox Co., Ltd. Iwatsuki Works

Claims (4)

[Claims] 1. A paper transport path constituted by an upper guide plate and a lower guide plate, a paper transport means for transporting a paper in the paper transport path, and a thickness of the paper transported by the paper transport means. Accordingly, the paper feeding device is provided with a conveyance path interval adjusting means for adjusting an interval between the upper guide plate and the lower guide plate. 2. A paper conveyance path which is composed of an upper guide plate and a lower guide plate, and has a registration adjusting means for adjusting the registration of the fed paper, and a paper for conveying the paper toward the registration adjusting means. The present invention is characterized by including a conveying means and a conveying path interval adjusting means for adjusting an interval between the upper guide plate and the lower guide plate according to a thickness of a sheet conveyed by the sheet conveying means. Paper feeder. 3. A cam mechanism having a cam for supporting the upper guide plate and capable of setting the height of the upper guide plate in a plurality of steps, the conveying path interval adjusting means, and the cam for adjusting the thickness of the paper. The paper feeding device according to claim 1 or 2, wherein the paper feeding device is configured by a cam driving means for rotationally displacing the same. 4. The conveying path interval adjusting means is provided between the upper guide plate and the lower guide plate through a pair of openings formed in the upper guide plate in a longitudinal shape and in parallel along the sheet conveying direction. A first position and a second on the upper guide plate
And a movable member for forming a conveying path that is displaceable between the movable member and the upper guide plate, and the movable member for forming a conveying path is arranged at the first position or the first position according to the thickness of the sheet. 3. The paper feeding device according to claim 1, wherein the paper feeding device is configured by a driving unit that sets the position to 2.