JPS58177834A - Paper loading device - Google Patents

Abstract

PURPOSE:To allow a loading bed to be extracted even before the completion of its descent by providing an ascent/descent drive mechanism capable of being coupled or released in a paper loading device. CONSTITUTION:When a jam is detected, the copying operation is immediately stopped and in response to it a motor 8 starts to rotate in an E direction. Accordingly a fork 2 starts to descend along a stanchion 5. In this case, if the descending speed of a lever 12 is made larger than that of the fork 2, the coupling between the lever 12 and fork 2 is released before the operator starts to extract a loading bed on noticing the jam indication, and in addition, a clearance is generated between the uppermost paper of the paper 1 and a feed paper roller 3 by that time, thus creating a condition that the loading bed can be extracted.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper stacking device for a paper supply section in an image dispensing device such as a copying machine.

In recent years, copying machines and other devices have been made to operate faster, but
In order to make effective use of this function, it is naturally necessary to load a large amount of paper.

In general, there are two types of paper used in photocopying devices such as photocopying machines (referred to as copying paper in photocopying machines): roll paper and paper. However, in the case of roll paper, it is difficult for users to handle it because it is heavy and requires replenishing a large number of sheets at one time. For this reason, in general high-speed copying machines, etc., paper is often used. But power,
If we use a copying machine as an example, in the case of paper, copies are made sequentially every fall, starting with the highest paper in the stack! 1. In simple loading, as the amount of loaded paper increases, the path through which the paper is fed changes as the number of sheets decreases (the position of the top paper gradually decreases), so in order to compensate for this, loading It is necessary to have a configuration in which the table is movable up and down and raised as the number of sheets decreases.

Conventionally, as a method for raising such a stacking table as the number of sheets decreases, a method of lifting the sheet using a nostalgia has been widely adopted when the number of sheets is small. However, with this method, as the number of sheets increases, the load on the spring increases, and it becomes difficult to load nine sheets. Therefore, in machines that load a large number of sheets, a line or a loading platform is raised using a drive mechanism (mainly a motor drive It).

Of course, in this case, a control means is required to start and stop the drive mechanism, so for example, a means for detecting the height of the topmost sheet of paper is provided, and the height of the topmost sheet of paper is determined by the amount of paper consumed. If the height of the topmost paper is lowered, the detection means detects this and rotates the motor, and when it reaches an appropriate height, stops the motor to maintain the position of the topmost paper. - It is generally assigned to keep within foot range.

In addition, in such a device, the paper (top paper) is in contact with the paper feed means such as the paper feed low two on the main device side, and it is not appropriate to pull the loading table out of the machine in this state. When the need arises, the loading table must be lowered; for example, when the remaining amount of paper is zero,
Alternatively, when a paper jam occurs, the stacking platform is normally lowered automatically so that paper can be replenished and paper can be removed. In addition, the following must be taken into consideration when rounding the lifting and lowering of a loading platform such as a stacker: The maximum stroke of the lifting and lowering of the loading platform must be greater than or equal to the maximum loading capacity of the loaded paper, and the loading amount for this stroke must be The purpose of this is to maintain a certain amount of time for raising and lowering the platform so that the lifting device that raises and lowers the platform does not have to overdo it.
The lifting and lowering time of a loading platform that can load sheets of paper is approximately 4 to 5 seconds if the thickness of the paper is 80μ to 100111, the stroke is 160 to 200+α or more, and the lifting speed is 50%/I@-. It is. Naturally, this elevating and lowering time changes in proportion to the speed of copying machines and the like, and as the loading capacity increases.

For paper loading devices equipped with a loading platform, the loading platform automatically lowers when the remaining amount of paper reaches zero or when paper jams at 9 o'clock, etc. However, with this type of equipment, the operator (worker) may sometimes pull the loading platform out of the machine without waiting for the loading platform to finish lowering. However, there is a risk that the paper and the loading platform may fall off the elevator and damage other nearby parts.

Therefore, the space between the loading platform and the lifting section is temporarily fixed (locked).
Some proposals have been made in the past that provide a means to prevent the loading platform from being pulled out of the aircraft while it is being raised or lowered.

However, if the operator pulls the loading platform carelessly in this way, it may cause damage to the opening, the means of lifting, and other parts, and furthermore, the operator may not be able to pull out the loading platform until the loading platform has been raised or lowered. This results in the disadvantage that there is a lot of time loss due to the rounding that has to be done.

The present invention has been proposed in order to eliminate the above-mentioned drawbacks of the conventional example, and it is a round paper that can be pulled out even when the loading platform has not finished descending in the new jam handling and paperless era. The purpose is to provide loading equipment.

The gist of the present invention is to include a column that supports a paper loading table so that it can move vertically at a predetermined speed;
gI! A paper stacking section that can be incorporated into the recording apparatus main body and removed from the heat, and a lift drive mechanism that is detachable from the loading platform and drives the loading platform upward to a predetermined position when engaged. and, when the loading platform needs to be lowered, the lifting drive mechanism and the loading platform are disengaged so that the loading platform can freely descend at a predetermined speed under its own weight. Located on the loading device.

An embodiment in which the present invention is applied to a copying machine will be described below with reference to the drawings. FIG. 1 shows an example of the paper stacking device of the present invention, and is a schematic cross-sectional view of the paper stacking device in a state where paper can be fed. In FIG. 1, a sheet of paper 1 is mounted and supported on a forklifter 2, and a sheet feed row 2-3 that contacts the topmost sheet of the sheet of paper 1 is provided on the main unit (not shown) side.

The Fusu-Chrysofi-2 is attached to a column 5 installed on a stand 4 that can be pulled out in one direction as shown in the figure on a rail (not shown) on the bottom part 6 through a sliding bearing. It is held slidably in the vertical direction shown by the arrow. 7 is a handle to be grasped when putting in and taking out, and a certain number of 0 or more constitutes ■.

Further, a chain 19 is provided adjacent to the fork 2 and stretched between the motor 8 and the Sugeroke, 9 and 10.11, and a lever 12 is fixed to a part of the chain 19. , this /4-120 has a roller-like tip and is rotatable in the direction of arrow C. The fork lift mechanism is formed into an O#s layer.

That is, the fork 2 of the component layer is held movably up and down by the strut 5, and is driven up and down by the lever 12 of the component layer that engages with the lower surface of the fork 2, and is supported stationary.

Note that since the fork 2 is heavy because it supports the loaded paper 1, multiple sets of supports, sliding bearings, etc. may be provided as necessary.

Here, in a state where paper can be fed as shown in FIG.
is pushed in the direction (opposite to the arrow B) of the configuration, and the leno 4-12 is always located at the bottom of the fork 2, and the motor 8 rotates in the direction D, so that the fork 2 is pushed in.
is pushed up against the shaft 5 in the paper feed H-1-3 direction by the lever 12.

Is the upper limit of this increase seven? -13, the paper l
When the topmost sheet of paper is detected, the motor 80 rotations are stopped and the fork 2 stops rising. At this upper limit value, the uppermost paper of the paper 1 and the paper feeding low two 3 are made to have an appropriate contact pressure, and the paper l is fed one by one, the uppermost paper position of the paper is lowered, and the seventh sensor 13 is lowered. When it stops being detected,
In response to this signal, the shifter motor 8 rotates in the direction of the arrow and repeats the operation of pushing up the paper 1 to the proper position again.

Here, if we consider the case where a jam occurs due to poor conveyance of copy paper in the main unit (1) or paper feed section), the copying operation will be stopped immediately when the jam is detected by an appropriate means. In response to this, the motor 8 of the constituent layer starts rotating in the direction of arrow 1 in the figure. L*, the fork 24 begins to descend along the support column 5.

At this time, the descending speed V of the fork 2, which is lowered by the rotating drive of the motor 80, and the descending speed yb of the fork 2, which is determined by the frictional resistance of the sliding bearing, etc., are expressed as Va.
>Vb, if the time at which the jam display is displayed and the operator begins to pull out the loading platform is, for example, 1 second, by that time, Leno-12 and Fork 2 of 1 configuration
is no longer secured, and by that time, a certain amount of gap has been created between the top paper of paper 8 and paper feed low two 3.
The loading table can be pulled out without damaging parts near the paper feed roller 3, where the paper is wound up. In other words, the shifter 2 moves up and down following the lever 12 due to 80 rotations of the motor, but in this embodiment, for example, the tip contact part of the lever 12 is rolled and the shifter 2 moves up and down, following the lever 12.
Since the fork 2 can be rotated in the direction, even if the loading part is pulled out during descent, the rollers rotate and the fork 2 separates from the leno-12 with almost no resistance. .

According to such a configuration, even if the operator accidentally pulls out the loading platform while the fork 2 is descending, the fork 2 is already in the configuration 12 (in this embodiment, the tip roller 12
If the consistency with a) is lost, and if the descending speed of the fork is set to 501 mm as shown in 9 above, there will be about 50 gaps between the paper feed low two 3 and the jam display wk 1 second. Therefore, the fork 2 can be pulled out without any problem, and in the pulled out state, it can freely fall onto the stand 4 due to its own weight.

Note that in the paper feeding state (the state shown in FIG. 1), the lever 12 is
It will be understood that the roller at the tip engages with the hook portion of the rear lower protrusion of the fork 2, as shown in the figure, to restrict the fork 2 from being pulled out.

Next, to explain the case when the remaining amount of paper reaches zero, when the round paper remaining amount detection sensor 14 installed at the top of the paper detects that the remaining amount of paper is zero, copying is stopped by that signal.
The fork 2 is lowered by rotation in the direction of the motor 80E when a sensor 15 installed at the bottom detects that the leno 4-12 has reached the bottom. By pulling the handle 7 at the bottom, the loading section can be taken out, allowing paper to be replenished outside the machine. Here, if we consider the case where the loading section is taken out before the loading section finishes lowering, this can be considered to be exactly the same as the operation when clearing a jam as described above.

Note that the rotation of the motor 8 in the E direction is stopped when the sensor 15 detects that the lever 12 has descended to the lowest position, but rotation is performed in the same manner in any of the above cases.

Needless to say, the rate of descent of the weight of the fork 2 changes depending on the amount of paper 8 remaining on the fork.

Figure #g2 is a schematic diagram with a round cross section showing the loading platform pulled out to the outside of the machine in the embodiment shown in Figure 1.
The column 5, fork 2, and paper 1 fixed to the stand 4 are shown pulled out of the machine. When the loading platform is loaded inside again, -16 detects the proper position of the loading platform in the direction B, and in response to that signal, the shift oak 2 is raised by rotating the motor 8.

Next, an example of the structure of a sliding bearing that supports the fork 2 in a vertically movable manner will be described.

Lever 1 fixed on chain 19 as shown in FIG.
An expanded shaft 21 is fixed to the tip of the roller 12a, and a roller 12a is rotatable in the direction C about the shaft 21. In a state where paper can be fed, the column 12m and the four-lifter 2 are in contact with each other at the lower part to maintain the position of the four-lifter 2. In this state M, the roller 12m is in an aura y 7' at the hook portion of the fork lifter 2 with a radius +α of the roller 12m as shown in the figure, so the fork cannot be pulled out in the true direction. When a jam or no paper signal is generated, the motor 8 rotates in the E direction and Δ-12 descends, but at this time the friend bearing 23 installed on the support 5 has a slippery true stroke as shown by the arrow 23. It is composed of a combination of materials with poor slip properties such as urethane 5 shown in 23m &p
Compared to the descending speed of lever 12, the descending speed of forklifter 20 is uneven. Then, about 1 second later, when the operator tries to pull out the loading platform due to the above-mentioned jam signal, the roller 12m and 7 oak lifter 2 in the fork hook part The retaining portion of the lug (2) is rounded to a radius that is less than the radius, and in this state, it is possible to pull out the loaded portion out of the machine by rotating the rollers 12m.

Free descent speed Vi of fork 2 and sea 4-2 described above
It can be said that the relationship oWA dynamic descent speed FI Va 'D Va > Wb only needs to be satisfied at least when the sheets l are loaded at maximum ('/b is maximum).

In this way, the present invention provides a structure in which the above-mentioned structure including a column that supports a paper loading platform (fork) so as to be movable in the vertical direction is provided so as to be able to be pulled out from the main unit, and a drive mechanism for raising and lowering this loading platform is provided. In this case, the fork is provided with the above-mentioned structure (2) including a lifter that can be engaged and detached, and the fork is pushed up by these four obstacles and pullers, but when the fork is lowered, it is disengaged from the lever. The present invention is characterized in that the fork is provided so as to be carried out by free-falling, and by means of this sleeve, configuration I can be pulled out during the free-falling of the fork. For example, without being limited to what has been described above, a hook-shaped fushita lever is used as a lifting mechanism, and this hook lever is used to lift the P7 from above. Alternatively, the bearing for lowering the fork at a predetermined speed may be provided with a rotatable multi-thread screw engagement. FIG. 5 shows a modification of such a fork opening and sliding means, in which a rotating mechanism t4- on the base 25 on the lifting drive mechanism side is attached to the bin 24 on the fork.
Normally, the spring force of the spring 27 causes the flap part gla of 25 to move away from the engagement opening, and the operation of the solenoid 28 causes the engagement opening to be released.

As mentioned above, according to the device of the present invention, when there is a jam or there is no paper, the operator can pull out the loading section to the outside of the machine even before the fortalifter finishes descending, improving work efficiency. In addition to this, the risk of damage to various parts of the device is reduced, making it extremely useful.

[Brief explanation of the drawing]

Drawing No. 15A shows part 1i of the present invention! A schematic sectional view of the structure of the paper loading device as an example, showing the paper feeding state, Figure 2 is a diagram when the loading platform is pulled out, Figure 3 is a cross-sectional view of an example of the structure of the Haspeshi bearing, @4 Figure FIG. 5 is a sectional view showing when the roof is lowered, and FIG. 5 is a view showing a modification of the locking means of the fork. 1: Paper 2: Forklifter (fork) 3: Paper feed roller 4: Stand 5: Strut 6: Bottom 7: Handle 8; Motor 9: Sugurokey F 10 + 11 Varnish f Location, To・ 12: Reno" 12 a
3: Sensor 14: Paper remaining amount detection sensor 15: Sensor 16: Sensor 19: Chain 21: Shaft 23: Sliding bearing 23, .23
To: Bearing is made of material 24: Pin 25: Base 26: Rotating / Serving - 27: None 26a: Rib part 28: Solenoid 189 - Figure 3 Figure 4

Claims (1)

[Claims] iii. A paper stacking section that includes a support that supports the paper stacking platform so that it can move vertically at a predetermined speed, and that is provided so as to be able to be incorporated into and pulled out from the main body of the device;
The lifting drive mechanism is provided to be removable from the loading platform and drives the loading platform upward to a predetermined position when the loading platform is engaged, and the lifting drive mechanism and the loading platform are engaged when the loading platform needs to be lowered. A paper loading device characterized in that the loading platform is configured to be able to freely descend at a predetermined speed due to its own weight by detaching the loading platform.