JPS60148858A - Variable speed paper feeder - Google Patents

Abstract

PURPOSE:To facilitate timing control of copier body by increasing the paper feeding speed of tray having longer paper feed distance when compared with that of tray having shorter paper feed distance. CONSTITUTION:The circumferential speeds of register rolls 2, 2' in copier body or feed rollers 10', 11' of tray separated longer from a paper detector 3 and auxiliary rollers 16a', 16b' arranged in the paper carry path are made higher than those of feed rollers 10, 11 separated shorter from the paper detector 3 and auxiliary rollers 16a, 16b. Consequently, the time required for the paper fed from each tray to arrive to the register rolls 2, 2' or the paper detector 3 is approximately equalized to facilitate timing control of copier body and to make the copying speed constant irrespective of the mounting position of tray.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application) The present invention relates to a variable feed speed type paper feeding device for a copying machine or the like.

(Prior Art) In conventional copying machines, the number of units that can be loaded onto the main body of the copying machine is generally one or two. However, there are cases where a customer requests that more than one set be installed at the same time. In view of such customer requests, the inventor has
He invented a multi-stage vertical paper feeding device for sub-options as shown in Figure 1, and applied for a patent for the patent No. 11135B-
1 1 0967>.

The optional paper feed equipment of the vertical multi-stage type will be explained below. FIG. 1 shows a schematic configuration diagram thereof.

In Fig. 1, 1 is the same as a conventional copying machine.
The main body of the copying machine shown in FIG.
A developing device, a transfer device, a fixing device, a feed roller 9, etc. are installed. Further, a main body inlet chute section 12 is provided at the bottom thereof.

At the bottom of the copying machine main body 1, a cassette module ('A-bushion paper feeding device) 5 according to the present invention is provided.

As shown, the cassette module 5 has a support frame 8 on the outside, and supports the copy body 1 by the support frame 8.

Furthermore, a cassette module 5' having the same structure is provided at the lower stage of the cassette module 5. The copying unit main body 1 and the cassette module 5 are supported by the support frame 8'.

Note that the cassette modules 5 and 5' in FIG. ``Tatsushiko'''s (=J was? 3 is used.

Inside the cassette module 5, there is a first cassette module with an exit located on the right at a position opposite to the body-input rotary chute section 12.
A second chute 25,26 and a lower current module chute 14 are provided.

The second shoe 1-26 is provided with a pinch roller 15a and an auxiliary roller 16a for feeding the paper, and the lower cassette module chute 14 is provided with a pinch roller 15a and an auxiliary roller 16a.
5b and the auxiliary roller 161) are cut by 39 times. Also,
First and second feed rollers 10 and 11 are provided near the entrances of the first and second chutes 25, 26, respectively.

Since the cassette module 5, J:U5' according to this conventional example has the above-mentioned configuration, the paper feeding force L? yl-6,
7 and 17.18 can be inserted from both sides.

The paper in the first paper feed cassette 6 installed in the cassette module 5 is sent out by the first feed roller 10, passes through the first chute 25 and the main body entrance chute section 12 at the bottom of the copying machine main body 1, and passes through the registration roller. 2. The leading edge of the paper hits 2' and the paper stops temporarily. Thereafter, the paper is fed to the photosensitive drum 4 at an appropriate timing. Similarly, the paper in the second paper feed cassette 7 is transferred to the second paper by the second feed roller 11.
The paper is fed to the chute 26 , further passes through the main body entrance chute section 12 , and is fed to the photosensitive tram 4 .

Further, the paper in the paper feed cassette 17 installed in the second stage cassette module 5' is sent out by the feed roller 10', passes through the first chute 25-, and is sent to the lower stage cassette module chute of the upper stage cassette module 5. 1~
It is sent to the inlet section 13.

This paper passes through the chute 14 for the lower cassette module, and is conveyed to the photosensitive drum 4 via the main body artificial shoe 1 part 12 and the registration rollers 2, 2'.

On the other hand, the paper in the paper feed cullet 18 is passed through the second chute 26' by the feed roller 11' to the lower cassette module 1 to the module chute entrance section 13.
Thereafter, the paper is conveyed to the photosensitive tram 4 through a path similar to the paper passing path of the paper feed cassette 17.

The detailed structure of the cassette module of this conventional example will be explained below with reference to FIGS. 2 to 4.

Fig. 2 is a side view of two stacked cassette modules, Fig. 3 is a plan view of the first of the cassette modules, and Fig. 4 is a view of Fig. 3 viewed from the direction of line 8-A. 2 shows a side view of the drive transmission II 4ii.

As is clear from FIGS. 2 and 3, support members 21 that support the legs 111 of the copying machine main body 1 are provided at the four corners of the support frame 8. Furthermore, positioning members 22 are provided at two diagonally opposite corners for fitting into the recesses of the wooden statue 1 of the copying machine for positioning.

The support member 21 and the positioning member 22 are also used when multiple cassette modules are stacked as shown in FIG.
The support member 21 and positioning member 22 of the upper cassette module 5 are the support member 2 of the lower cassette module 5'.
1' and the positioning member 22', the upper cassette module 5 is supported by the lower cassette module 5' in a proper positional relationship.

The cassette module 5 has first and second shoes 1 to 25 and 26, each having an outlet opposite to the main body inlet chute 12 of the copying machine main body 1, and a lower cassette 1-module chute receiving section 13. It has lower cassette module shoes 1 to 14. The second chute 26 is provided with a pinch roller 15a and an auxiliary roller 16a, while the lower cassette module chute 14 is provided with a pinch roller 15b and an auxiliary roller 16b.

First and second feed rollers 1'0.11 are provided near the paper input [-1] of the first and second chutes 25.26. In addition, the paper feed cassettes 6.7 are installed from both sides of the cassette module 5, r, the paper feed force sensor h6.
, 7 are provided with paper push-up members 24a and 24b for lifting the paper stored in them. In addition, the tip positioning parts 4 27a, 27 of the paper feed force cellars l-6, 7
1+ is drawn.

As is clear from FIG. 2, the cassette module 5' located below also has exactly the same cotton construction as the cassette module 5 described above. When the cassette module 5.5' of these units is inserted, the lower cassette I-Mogicor shoe 1 to the inlet portion 13 of the cassette 1-Mogicor 5 are
1st and 2nd si of lower Karen 1~Mojicol~5': L-
1 to 25', 26' (opposed to the exit of the chute 14' for the I-mail and lower cassette modules).

It should be noted that the reference numerals of the constituent elements of the cassette module 5' in the lower part of FIG. 2 are the same as those of the cassette module 5 in the upper part when the "dash" is removed from the reference numerals.

When paper feed cassettes are inserted from both the left and right sides into the cassette module 5゜5' configured as above, the paper feed cassette 6
．． 7 are cassette tip positioning members 27a and 27, respectively.
The position is determined by b.

On the other hand, the paper feed cassettes 17 and 18 are positioned by cassette tip positioning members 27a' and 27b', respectively.

Positioned paper cassette 6.7.17 and J:18
are paper push-up members 24a and 24b, respectively.

The sheets 24a' and 24b' push up the sheets stored in the respective sheet feed rollers 1 to 10 and press the sheets against the first and second feed rollers 10, 11, 10' and 11' with appropriate force.

Therefore, the first and second feed rollers 10. '11°10'
When a suitable feed roller of
Sent to 2. For example, cassette module 1 below
When the first feed roller 10' or the second feed roller 11' is selected and rotated, the paper passes through the first shoe 1-25' or the second feed chute 26'. , Shoes 1-11 for the lower cassette modules of Karen 1 to Module 5 on the top! It passes through I and is sent to the Rossicoat section 12.

Next, the driving of the first and second feed rollers 10, 11, 10' and 11' will be explained using FIGS. 3 and 4.

) The J set module 5 includes a gear 30 that receives driving force from the main body side drive gear 33, 3/I of the copying machine main body 1.
There is. A gear block 1-31 is meshed with this gear 30, and two electromagnetic clutches are connected to this gear block 1-31. A chain 32 is stretched between the gear sprocket 31 and the gear sprocket 37 via an auxiliary roller drive sprocket 36°36. Also, the gear of the gear sprocket 37 and the gear 3
The rotational force of the gear 38 is further transmitted to the electromagnetic clutch 28.

Therefore, the electromagnetic clutches 28 and 29 are duplicated (a number of copies (A
It always receives rotational force from the drive gear 3-3 of No.1. Therefore, when one of the electromagnetic clutches 28 and 29 is turned on at an appropriate timing in response to a command from the copying machine main body 1 (not shown), both of the first and second feed rollers 10 and 11 are activated. Either one rotates at the appropriate timing.

The gear 30 of the cassette module 5 also meshes with the gear 30a, and the rotational force of the gear 30a is applied to the gear 30 of the cassette module 5' via the gear 39 and the drive gear 35.
' will be communicated. Driving the cassette module 5'〕J
The transmission ('3 side) is exactly the same as that of Karen 1-Jule 5, so the explanation will be omitted.

In addition, the driving force transmission of the cassette module 5) ヱUJf 4
In order to make the driving force transmitting mechanism 4M of the cassette module 5' correspond to the driving force transmitting mechanism 4M of the cassette module 5', the symbol of the driving force transmitting mechanism of the cassette module 5' is changed from the symbol of the driving force transmitting mechanism of No. is shown as (-1-).

The drive gears 35, 35' in the figure are shafts 40.4 (1'
It is rotatable around the cassette module 5.
The drive gear 35 is biased with a counterclockwise force by a spring (not shown). Further, the drive gear 35' of the lowermost cassette module 5' is held in a horizontal state by a stopper (not shown) so as not to project downward through the opening 41.

Incidentally, in the conventional example described above, Kazen 1 to Mogicor were stacked in two stages, but it is clear that the same method can be carried out in three or more stages.

According to this conventional example, by stacking a required number of cassette modules of one type, the customer can mount as many paper feed cullets as required.

However, in the above-mentioned conventional device, the registration scroll 2
．． 2' (or paper detection device 3) distance 1i11t
J: Paper leading edge position of lower cassette 17.18 J:
The distance to the re-registration roll 2.2' (or paper detection device 3) is increased by 1, and the time required for the paper to reach the register roll 2.2' (or paper detection device 3) from the time the paper is sent out is reasonable between trays.For this reason,
The timing control of the copying machine main body 1 becomes complicated,
Ic, which has the disadvantage of increasing costs,)
There were drawbacks such as slow copy speed.

(Purpose) An object of the present invention is to provide a paper feeding device for ossion that eliminates the drawbacks of the conventional device described above, facilitates timing control of the main body of a copying machine, and does not reduce copying speed.

(41', N Required) A feature of the present invention is that the paper feed device is configured such that a paper feed cassette can be installed from at least one of the left and right sides and stacked on the copier main body. Scroll or paper feed to the paper detection means+11i1 Paper feed of a tray with a large feeding distance 191! 4M paper feed speed,
The present invention is provided with means for increasing the paper conveyance speed compared to that of the 1-lay, which has a short paper conveyance distance.

(Example) In the following, the invention will be explained by way of examples.

J shown in FIG.
Register roll 2, 2' from Hi18 Father is monthly 1 if
(Compared to the distance from the paper feed cassettes 6 and 7 installed in the upper cassette module 5 to the register roll 2.2', the distance to the detection device 3 is approximately equal to the thickness of the cassette module. [Pu long.For this reason, above,
Feed rollers 10, 10' installed on the lower cullet module 5°5'.

11.11' and auxiliary rollers 16a, 16a'.

16b are the same, as described in the prior art section, the time it takes for the paper fed from the paper feed cassettes 6 and 7 to arrive at the registration scroll 2.2' or the paper detection device 3 will be different. , the paper fed from the paper feed cassettes 17 and 18 is transferred to the register rolls 2, 2' or the paper detection device 3.
There will be a difference in arrival time.

Therefore, in the embodiment of the present invention, the feed rollers 10' and 11' of the lower force roller 1 to the modicoll 5' and the auxiliary roller 16a are
' and an auxiliary roller 16I installed in the chute 14 for the lower cassette module of the upper cassette module 1 to module 5.
) is made faster than that of module 5.

- For example, from the paper outlet of the paper feeder 1-6 and 7 to the upper cassette module 5,
, the distance to 2' is 13, the lower curfew is 1 to joule 5
If the distance from the paper outlet of the paper feed cassettes 17d3 and 18 to the register rolls 2, 2' and C at ' is 11+1, the peripheral speed of the feed rollers 10', 11' and auxiliary rollers 15a' and 1611 is V2, feed rollers 10 and 11 of upper cassette module 5 and auxiliary roller 1
The rotation speed of 6a is changed to V, and the poem is written as . Then, the time it takes for the sheets coming out of the paper feed cassettes 6 and 7 and the sheets coming out of the paper feed force rollers 1 to 17 and 18 to reach the register rolls 2 and 2' becomes equal.

(1=up=-h knee]=).

VIV! Specifically, the tooth number ratio of the tuple gear 30a shown in FIG. 4 is adjusted to make the rotational speed of the gear 35 twice that of the gear 34.

Further, as another specific example, the number of teeth of each gear described in -H is kept the same in the upper and lower cassette modules, and the diameters of the feed rollers 1', 10' and the auxiliary roller 16a' are respectively changed. Feed roller 0゜11 J5 J: The diameter of the auxiliary roller 6a is (1÷-) 1 times the diameter, and the diameter of the auxiliary roller 6b is also doubled.

Although typical specific examples of the present embodiment have been shown above, the specific examples of the present invention are not limited to these, and it goes without saying that various changes can be made. Also, even if the Kare-no-I~ module is made into three or four stages, the same idea as in the above embodiment can be used.
, the paper transport time from the cassette module 7 in the 4th stage is almost equal to that of the 21B paper fed from the force reflex 1 module in the 1st and 2nd stages ( It's obvious that it's C.

(Effects) As described above, according to the present invention, copying (shallow water) is possible depending on the distance from the registration roller or paper detection device of the paper tray, the feed roller of the manual tray, and the conveyance path of the paper taken out from the paper tray. Since the circumferential speed of the auxiliary 1 cola in the tray is made faster than that of the feed roller and the auxiliary roller of the tray with the smaller distance, the paper fed from each I-ray reaches the register roll or paper detection device. Therefore, the timing control of the copying machine main body 1 becomes easy.Furthermore, the copying speed is constant regardless of the position where the tray is installed.

[Brief explanation of drawings]

Fig. 1 is a side view of a conventional device and an embodiment of the present invention, Fig. 2 is a detailed side view of the main parts of Fig. 1, Fig. 3 is a plan view of the upper cassette module in Fig. 2, and Fig. 4. A
- It is a side view of the driving force transmission mechanism when seen from the A line direction. 1... Copying machine main body, 2, 2'... Register roll,
3...Paper detection device, 5,5'...Cassette module (optional paper feeding device), 6,7.1718...
・Optional paper feeding device, 10.10'...First feed roller, 11i1'...Second feed roller, 1
4.14'... Chute for lower cassette module, 28.29.28', 29'... Electromagnetic clutch, 30.30', 38.38'... Gear, 31.
13', 37.37': Gear sprocket agent Patent attorney Michito Hiraki and 1 other person

Claims (3)

[Claims] (1) In a paper feed device in which a single paper feed cassette can be installed from at least one of the left and right sides and can be stacked on the copy machine main body, the paper conveyance distance to the register roll or paper detection means of the copy machine main body. 1. A variable speed feeding device, characterized in that it is provided with means for increasing the paper feeding speed of the paper feeding mechanism of a tray with a larger paper transport distance than that of a tray with a smaller paper transport distance. (2) A variable feed speed type paper feeding device described in a patent, characterized in that the number of teeth of the gear constituting the paper feeding mechanism is reduced to increase the paper feeding speed. (3) The variable feed speed paper feeding device according to claim 1 or 2, characterized in that the diameter of the roller constituting the paper feed mechanism is increased to increase the paper feed speed. .