JPS61127526A - Paper lift for copier - Google Patents

Abstract

PURPOSE:To lift/lower an elevating table through dynamic pulley thus to reduce the load by providing a chain wheel to be driven through a motor, a pulley fixed to an elevatable table for mounting paper and a stripe transmission member to be stretched from the chain wheel to suspend said pulley as a dynamic pulley. CONSTITUTION:Engaging pins 2a, 2b juxtaposed in horizontal direction on the body 2 is stopped with a horizontal member 10 movably while engaging pins 2c, 2d juxtaposed in vertical direction is stopped with a vertical member 11 movably. A pulley 4 and a chain wheel 3 are fixed above and below the body 2 while a dynamic pulley 7 is fixed to an elevatable table 6 for mounting paper. One end of chain 5 is coupled to a fulcrum 12a at the upper end of vertical member 11 while the other end is stretched sequentially over the dynamic pulley 7, pulley 4, chain wheel 3 and dynamic pulley 7 and coupled to a fulcrum 12b at the lower end of vertical member 11. Since the elevatable table 6 is lifted/lowered through the dynamic pulley 7, the torque required to rotate the chain wheel 3 can be reduced while the tensile force to be applied onto the chain 5 can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention relates to a paper lift device for raising and lowering a lifting table on which copy paper is placed, in order to stock or feed copy paper in a copying machine.

"Prior Art" Representative examples of conventional paper lift devices are shown in FIGS. 2 and 3.

In the paper lift device 21 shown in FIG. 2, the main body 22 includes a chain wheel 23 and three pulleys 24m and 24-.

24c, and the strip transmission member 25 is inserted between them.
fjl, L, the elevating table 26 is supported by the strip-shaped transmission member 25. 27. ．． 27- is a support portion. chain wheel 2
3 is rotated, the strip transmission member 25 moves, and the lifting platform 26 supported by the strip transmission member 25 moves up and down.

Next, in the paper lift device 31 shown in FIG. 3, a chain wheel 33 and a pulley 34 are attached to the main body 32, a strip transmission member 35 is tensioned between them, and a lifting platform 36 is controlled by the strip transmission member 35. I support it. 37 is a support portion. 1 car 3
3 is rotated, the strip transmission member 35 moves, and the elevating table 36 . will go up and down. Note that the guide rail 38 and the guide roller 3 are installed in order to prevent horizontal positional deviation and tilting of the lifting platform 36 when going up and down.
9 is provided.

"Problems with the prior art" In the above-mentioned paper lift device 21.31, the elevating platform 26.36
and the weight of the copy paper as they are in the U4 car 23.
Since the structure is such that it is supported by a torque of 33, there is a problem in that it requires a large torque.

OBJECT OF THE INVENTION The main object of the present invention is to provide a paper lift device that can support a lift table and the bulk of copy paper placed thereon with a small torque.

``Structure of the Invention'' The paper lift device for a copying machine of the present invention includes a chain wheel that is engaged with the main body and driven by a motor, a pulley that is attached to a lifting platform for wheeling copy paper, and the pulley! 1IfkvL, the elevator platform is provided with a strip transmission member stretched from the chain wheel so as to be suspended as 1IfkvL, and the elevating platform is suspended by the strip transmission member so as to be movable up and down via the 1 wheel. It has the above characteristics.

In still another aspect, a horizontal member is movably engaged with the main body and has a surface inclined with respect to the horizontal plane, and the horizontal member is movably engaged with the main body and supported by the inclined surface of the horizontal member. A vertical member, a main body or a chain wheel engaged with the vertical member and driven by a motor, a pulley attached to a lifting platform for placing copy paper, and a pulley stretched from the chain wheel so as to suspend the pulley as a movable pulley; comprising a strip transmission member having one end fixed to the vertical member or the chain wheel;
The structure is characterized in that the elevating platform is suspended by the strip-shaped transmission member so as to be movable up and down via the pulley.

In yet another aspect, a horizontal member is horizontally movably engaged to the body and has a surface inclined with respect to the horizontal plane, and is vertically movably engaged to the body and supported by the inclined surface of the horizontal member. a vertical member, a chain wheel that is engaged with the main body and driven by a motor, a /I wheel that is attached to a lifting platform on which copy paper is placed, and a wheel that is installed from the chain wheel so that the pulley is suspended as a movable pulley, and that has one end. A strip transmission member fixed to the first vertical member is provided, and the elevator platform is suspended by the strip transmission member so as to be able to be raised and lowered via the pulley, and further actuated when the vertical member is lifted from the horizontal member. The configuration is characterized in that it is provided with a switch means for.

In the above configuration, the main body usually refers to the paper lift device main body, but if the paper lift device is incorporated into a copying machine, it may be the copying machine main body.

Furthermore, examples of the linear transmission member include a chain.

"Example" The present invention will be explained in more detail below based on the example shown in the drawings. Note that this invention is not limited to this.

In the paper lift device W1 of a copying machine according to an embodiment of the present invention shown in No. 1vjIJ, two engagement bins 21 are provided in the main body 2.
．． 21 are screwed in parallel in the horizontal direction, and two engaging pins 2c, 2° are also fixed in the vertical direction.

A horizontal member 10 is attached to the engaging pins 21.2k arranged in the horizontal direction.
is locked. This horizontal member 10 has horizontally long elongated holes 10□, 10. ．．
Since the retaining pins 21-21+ are inserted through 10,
The horizontal member 10 is movable in the horizontal direction by the length of the elongated hole 10m and 10h. The upper end surface 10c of the horizontal member 10 is inclined in the direction in which the horizontal member 10 can move horizontally.

On the other hand, engagement pins 2° and 2j arranged in the vertical direction
A vertical member 11 is engaged with the vertical member 11 . This vertical member 1
1 is provided with elongated holes 11i and 11b in the vertical direction, and the engaging pins 2c and 2- are inserted into and engaged with these elongated holes 11□ and 11. Therefore, the vertical member 11 is basically It is movable in the vertical direction by the length of the elongated holes 11i and llb. However, since it is pressed against the upper end surface 19c of the horizontal member 10 under the downward force of gravity and the spring 15, its vertical position is defined by the horizontal member 10. However, the spring 15 is an omitted reboil.

There is a t below the main body 2! ! 1 A tunnel 3 is attached, a pulley 4 is attached above the main body 2, a movable WI wheel 7 is attached to the lifting platform 6, and a chain 5 has one end connected to the upper end fulcrum 124 of the vertical member 11, movable pulley? , f
k car 4. Chain wheel 3. The movable pulley 7 and the lower end fulcrum 12 of the vertical member 11 are stretched in this order. However, the other end of the chain 5 and the lower end fulcrum 12- of the vertical member 11 are connected to the spring 1.
3, so that the chain 5 is not loosened at all times.

The mechanism configured as described above is shown in FIG.
Although it is shown only in front of the lifting platform 6, it is also provided on the opposite side of the lifting platform 6.

Now, when the chain wheel 3 is driven to rotate clockwise in FIG. 1, the movable pulley 7 is pulled upward by the driving force. Conversely, when the chain wheel 3 is rotated counterclockwise, the movable pulley 7 descends downward due to gravity. Therefore, the lifting platform 6 is raised and lowered.

At this time, the torque required by the chain wheel 3 is 1/2 of the weight of the lifting platform 6 and the copy paper (not shown) placed on it, even if the mechanism on the near side and the mechanism on the opposite side are combined. It's just enough to support it (half of what it used to be).

The guide rails 8 and guide rollers 9 prevent the lifting platform 6 from shifting and tilting in the left-right direction when going up and down.

The reference position alignment between the main body 2 and the lifting platform 6 is performed as follows.

First, the chain wheel 3 is rotated to roughly align the reference position.This reference positioning can be done only roughly, so it can be done easily.Fourth, if the lifting platform 6 is located higher than the reference position, use the horizontal 10 slightly to the left in Figure 1.

The upper end surface 10c of the horizontal member 10 is high on the left side and low on the right side (because it is slanted, if you move the horizontal member 10 to the left side,
The average height of the portion supporting the vertical member 11 is reduced.

Therefore, the upper end fulcrum 121 and the lower end fulcrum 1 of the vertical member 11
Since 2b is lower, gi111fh car 7 is also reduced by that amount (
@ Secretly, it will fall by that l/2).

If the slope of the upper end surface 10e of the horizontal member 10 is appropriately selected, the movable pulley 7 can be slightly lowered with good operability. Therefore, it becomes easy to precisely align the reference positions of the main body 2 and the lifting platform 6.

If the lifting platform 6 is at a lower position than the reference position when the rough reference positioning is performed, the horizontal member 1
All you have to do is move 0 to the right.

The level of the lifting platform 6 is also adjusted by performing the above operation using the mechanisms on the front side and the opposite side.

As described above, according to the paper lift device 1, it becomes easy to accurately perform the reference position alignment of the main body 2 and the lifting platform 6 and the horizontal adjustment of the lifting platform 6. The slope of the upper end surface 10c is 1
/100 to 10/100 <Leprosy is preferred.

By the way, a microswitch 14 is attached to the vertical member 11, and a switch lever 14□ of the microswitch 14 is in contact with the upper end surface 10 of the horizontal member 10. In this state, the microswitch 14 is off.

Assuming that something is fixed under the platform 6 while the platform 6 is lowering, will the movable pulley 7 continue to rotate counterclockwise despite this?
Then, the vertical member 11 is lifted upward.

Then, the microswitch 14 also moves upward, and the distance from the horizontal member 10 is opened (therefore, the switch lever 14 is also opened, and the microswitch 14 is turned on).

If the ON signal of this microswitch 14 is used as an alarm signal, an alarm signal can be issued when something is caught under the lifting platform 6. Further, by stopping the rotational drive of the 1!1 car 3, safety can be improved.

Other embodiments include a horizontal member 10 and a vertical member 11.
An example is one in which the chain 5 is omitted and both ends of the chain 5 are also fixed to the main body 2.

Further, as a modification of the chain wheel 3 and the movable pulley 7, a wheel pulley or a differential pulley may be used.

"Effects of the Invention" According to the present invention, there is provided a chain wheel that is engaged with the main body and driven by a motor, a pulley that is attached to a lifting platform that picks up copy paper, and the chain wheel that is suspended as a movable pulley. There is provided a paper lift device for a copying machine, comprising a strip-shaped transmission member stretched from the paper-shaped transmission member, and the elevating platform is suspended by the strip-shaped transmission member so as to be movable up and down via the pulley. This creates a mechanism for raising and lowering the lifting platform using a movable pulley, so the torque for rotating the fil wheel is small, and the tension applied to the strip 4H member is also reduced, so a thin strip transmission member can be used. There are advantages. Furthermore, it is possible to avoid wear of the linear transmission member and loosening due to long-term use.

and a horizontal member movably engaged with the main body and having a surface inclined with respect to the horizontal plane; a horizontal member movably engaged with the main body and supported by the inclined surface of the horizontal member; A vertical member, a main body or a chain wheel engaged with the vertical member and driven by a motor, a pulley attached to a lifting platform for placing copy paper, and a pulley stretched from the chain wheel so as to suspend the pulley as a movable pulley; One end of the vertical i
A sheet for a copying machine, comprising a strip transmission member fixed to the Ns material or the chain wheel, and the elevator platform is suspended by the strip transmission member so as to be movable up and down via the pulley. A lift device is provided, which, in addition to the above-mentioned effects, provides the advantage of being able to easily fine-tune the height of the platform and its level.

In yet another aspect, the lI! l A horizontal member having an inclined surface, a vertical member that is vertically movably engaged with the main body and supported by the inclined surface of the horizontal member, a chain wheel that is engaged with the main body and driven by a motor, and an elevator for placing copy paper. A pulley attached to a stand, and a strip transmission member stretched from the chain wheel so as to suspend the pulley as a movable pulley and having one end fixed to the vertical member. A lifting platform is suspended via the pulley so that it can be raised and lowered,
Furthermore, there is provided a paper lift device for a copying machine, characterized in that it comprises a switch means activated when the vertical member is lifted from the horizontal member, whereby, in addition to the above effects, there is a Since it becomes possible to immediately detect when a decision has been made, it is possible to ensure the safety of operation.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the main part of a paper lift device for a copying machine according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of the main part of an example of a conventional paper lift device, and FIG. 3 is a diagram of a conventional paper lift. FIG. 7 is an explanatory diagram of the main part configuration of another example of the device. (Explanation of symbols) 1... Paper lift device of copying machine 2... Main body 2a, 2h-2c, 2a... Engagement pin 3... LII
Wheel 4... Pulley 5... Strip transmission member
6... Lifting platform 7... Moving pulley 10... Horizontal member 10□, IO... Long hole lOc... Upper end surface 11... Vertical member 11, .
11h...Elongated hole 12,...Upper end fulcrum +2b...Lower end fulcrum 14...Micro switch.

Claims (1)

[Claims] 1. A chain wheel that is engaged with the main body and driven by a motor, a pulley that is attached to a lifting platform on which copy paper is placed, and a pulley that is stretched from the chain wheel so that the pulley is suspended as a movable pulley. 1. A paper lift device for a copying machine, comprising a strip-like transmission member, wherein the elevating platform is suspended by the strip-like transmission member so as to be movable up and down via the pulley. 2. A horizontal member that is horizontally movably engaged with the main body and has a surface inclined with respect to the horizontal plane; a vertical member that is vertically movable engaged with the main body and supported by the inclined surface of the horizontal member; A chain wheel engaged with the vertical member and driven by a motor, a pulley attached to a lifting platform on which copy paper is placed, and a pulley suspended from the chain wheel as a movable pulley, with one end attached to the vertical member. Alternatively, the paper lift device for a copying machine is provided with a strip transmission member fixed to the chain wheel, and the elevating platform is suspended by the strip transmission member so as to be movable up and down via the pulley. . 3. A horizontal member movably engaged with the main body and having a surface inclined with respect to the horizontal plane; a vertical member movably engaged with the main body and supported by the inclined surface of the horizontal member; a chain wheel that is engaged and driven by a motor; a pulley that is attached to a lifting platform for placing copy paper; and a pulley that is suspended from the chain wheel as a movable pulley and that is fixed at one end to the vertical member. comprising a strip transmission member, by which the lifting platform is suspended so as to be movable up and down via the pulley, and further comprising a switch means that is activated when the vertical member is lifted from the horizontal member. A paper lift device for a copying machine, characterized by: