JPH0260908B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a positioning and locking device for a moving body such as a transfer sheet mounting plate of a copying machine or a scanning optical system.

Using a paper feeding device such as a copying machine, place a bundle of transfer sheets on a transfer sheet placement plate held in a horizontal position,
It is known to feed the sheets one by one to a transfer section or the like of a copying machine by rotating a paper feed roller that is in contact with the leading edge of the uppermost sheet.

In some types of such paper feeding devices, sheets are fed one by one, and as the number of loaded sheets gradually decreases, the sheet placement plate is intermittently raised to maintain a constant paper feeding level. , and when all the sheets have been fed, the sheet placement plate that has reached the highest position is lowered to the lowest position, and in this state, a new sheet is loaded.

In some types of drive means for raising and lowering the sheet placement plate, a wire is stretched around a plurality of pulleys, one end and the other end of the wire are locked to the drive pulley, and the wire is moved to a predetermined position. The number of windings of the wire is wound around the drive pulley, and the sheet placement plate is locked to the middle part of the wire. In this state, the drive pulley is rotated forward and backward by the driving force of the motor, thereby allowing the sheet to be placed. The board is raised and lowered vertically.

In such a paper feeding device, when positioning and locking the sheet placement plate with respect to the wire, conventionally, the sheet placement plate is held in a horizontal position, and the sheet placement plate is moved as appropriate. , the wire was locked using a locking means such as a screw. Furthermore, in the past, locking means such as screws were used to lock one end and the other end of the wire to the drive pulley.

According to such a locking means, since the sheet mounting plate is positioned and then locked to the wire, not only does it take a lot of time to adjust the positioning, but also the work of tightening screws etc. is extremely troublesome. Furthermore, if the above-mentioned locking operation is performed without accurate positioning, there is a risk that the sheet placement plate will not be able to maintain its horizontal position. Further, on the drive pulley side, the work of locking the end of the wire is also extremely troublesome. In addition to the sheet placement plate, examples of moving objects include, for example, the document scanning optical system of a copying machine, which is driven by a drive device consisting of a pulley, wire, etc. Similarly, the work for positioning and locking the movable body has become extremely troublesome.

SUMMARY OF THE INVENTION An object of the present invention is to provide a positioning and locking device for a moving body, which has been developed in view of the above points, and is capable of accurately positioning and locking a moving body with a single operation.

The present invention will be explained below with reference to illustrated embodiments.

FIG. 1 shows an example of a paper feeding device of a copying machine to which the apparatus of the present invention is applied. A sheet placing plate 2 as a moving body is provided inside the paper feeding case 1 of this paper feeding device.
It can be raised and lowered freely inside. That is, the sheet placement plate 2 is locked to a rigid wire 5 at the two positioning locking portions 3 and 4, and the wire 5 moves the sheet placement plate 2 in a straight direction, so to speak, in this embodiment. In this case, it is moved in the vertical direction. Note that the locking portions 3 and 4 will be described later.

The wire 5 is stretched across pulley groups 6, 7, 8, 9, 10, and 11 arranged at the positions shown in the figure, and is directed in the moving direction of the sheet placement plate 2, so to speak, perpendicularly in this embodiment. It is stretched in the direction. Among the pulleys, pulley 6 serves as a drive-side pulley, while the other pulleys rotate as the wire 5 moves.

As shown in FIG. 2, the wires 5 are arranged in pairs on both sides of the sheet placement plate 2, and both wires 5, 5 are connected to a drive motor 13, a worm 14, a worm wheel 15, a shaft 16, and When the drive motor 13 is driven via the pulley 6 on the drive side and rotates forward in the direction of the solid arrow,
The sheet placement plate 2 rises, and when it rotates in the opposite direction in the direction of the dashed arrow, it falls. In addition, pulley 7
is a pulley that adjusts the tension of the wire 5, and the tension can be arbitrarily adjusted by the tilted position of the lever 17.

In FIG. 1, a sheet bundle S is placed on the sheet placement plate 2, and in this state, the upper surface of the sheet is in contact with the paper feed roller 18. Then, sheets are fed one by one in the A direction by the rotational action of the paper feed roller 18 in the direction of the arrow, and as the number of sheets gradually decreases, the sheet placement plate 2 is rotated by the normal rotation of the drive motor 13. The sheet loading plate 2 is raised intermittently to maintain the sheet feeding level at all times, and when all the sheets have been fed, the sheet loading plate 2, which has reached the highest position, is moved by the drive motor 13 to the imaginary line position in FIG. Due to reversal,
It's starting to go down. In this state, a new sheet is loaded onto the sheet placement plate 2. After this loading, the drive motor 13 rotates forward and the sheet placement plate 2
rises from the imaginary line to the solid line position, and in this state, the motor temporarily stops and the upper surface of the sheet contacts the paper feed roller 18.

Now, in such a paper feeding device, it is necessary to hold the sheet placement plate 2 in a horizontal position so as not to impair the paper feeding performance at the paper feeding roller portion. That is, the sheet mounting plate 2 is positioned in a horizontal position and the wire 5 is
It is necessary to lock it in place. Also, wire 5
One end and the other end are respectively locked to the pulley 6 on the drive side, a wire is wound several times, and the sheet placement plate 2 is at the lowest position (initial position) shown by the imaginary line. When the drive motor 13
If the sheet mounting plate 2 is to be started, it is necessary to position and lock the sheet mounting plate 2 to the wire 5 so that the sheet mounting plate 2 is set at the imaginary line position relative to the starting position. .

According to the present invention, such positioning and locking can be performed with an extremely simple operation. In FIG. 3, first fittings 19 and 20, each having a spherical shape, for example, are tightly fitted to one end and the other end of the wire 5. As shown in FIG.
Further, second fittings 21 and 22, which are also spherical in shape, are tightly fitted in the middle of the wire at a predetermined distance from one end or the other end of the wire 5. Note that after these fittings are inserted into the wire, they are fixed to the wire by caulking or the like.

In the axial direction of the pulley 6, as shown in the figure, there are first fittings 19, 2 which are open toward the periphery and penetrated through.
0 is a first mating element engaging slit groove 24 that can be freely inserted and removed.
is provided. In addition, second mating elements 2 are attached to boss portions 25a and 26a at both ends of the stays 25 and 26 (see FIG. 2) fixed to the bottom surface of the sheet placement plate 2.
Slit grooves 27 and 28 for engaging second fittings are provided in which the fittings 1 and 22 can be freely inserted and removed. This slit groove has a slit that penetrates a hole bored in the axial direction in a direction perpendicular to the hole.

Here, the first fitting elements 19 and 20 are inserted into the slit groove 2.
4, and one end and the other end of the wire 5 are wound several times around the wire winding groove 6a of the pulley 6, respectively, and the second fittings 21 and 22 are engaged with the slit grooves 27 and 28. In this state, the sheet placing plate 2 is set to the virtual line position (initial position) in FIG. 1 and is in a horizontal position.
The total length of the wire 5, the distance from the first fitting element 20 to the second fitting element 21, and the distance from the second fitting element 21 to another second fitting element 22 are set accurately. Note that the first mating element 19, 20
is inserted into the slit groove 24 to a portion corresponding to the wire winding groove 6a, and the wire is pulled out from the open slit 6b in the portion of the winding groove 6a.

In this way, the sheet mounting plate 2 is positioned and locked to the wire, but in this case,
All you need to do is fit the fitting into each slit groove. For example, if you prepare a large number of wires of this kind and use them for each copying machine during the assembly process of a copying machine, etc., there will be no problem. It can be assembled without any skill, and this kind of work is easy and the assembly time is greatly reduced.
Further, disassembly for maintenance etc. is similarly easy.
Furthermore, the horizontal precision of the sheet placement plate is also improved. Note that if the wire is stretched, the horizontal accuracy and position of the sheet mounting plate may be disturbed, so it is necessary to use a rigid wire.

In FIG. 4, a slit groove as shown in the figure is provided on the end surface of the stay 29 fixed to the bottom surface of the sheet mounting plate 2.
This is shown in which a fitting element is engaged. In addition, the plate 31 and the set screw 32 can also be used as a measure to prevent it from coming off. Fifth
The figure shows a crank-shaped slit groove formed in the stay 33, which can achieve the same function as the previous embodiment. FIGS. 6 to 8 show an example of a configuration in which a fitting having the shape shown in the figure is firmly fitted to the wire 5, and these are engaged with grooves, holes, protrusions, etc. of the boss part of the stay. It is something. 9th
In the example shown in the figure, the shape of the fitting that is firmly fitted to one end and the other end of the wire is square or round, and the fitting is engaged with a slit groove of a corresponding shape. With this, the intended purpose can be achieved.

In this way, the positioning and locking of a movable body such as a sheet placement plate can be performed with high precision and extremely easily.
An example of this is the original scanning optical system of a copying machine, which is driven by a drive device consisting of a pulley, wire, etc., and the present invention can be applied to such a drive device. In addition, the present invention is widely applicable not only to copying machines but also to this type of moving body driving device.

As described above, according to the present invention, positioning and locking of the movable body to the wire can be performed with one operation and with high precision.
A positioning and locking device for a mobile body can be provided.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of an example of a paper feeding device of a copying machine to which a positioning and locking device according to an embodiment of the present invention is applied, FIG. 2 is a perspective view of a sheet placement plate drive mechanism of the paper feeding device, FIG. 3 is a perspective view showing how the wire of the positioning and locking device is attached, FIGS. 4 to 8 are perspective views showing modified embodiments of the second fitting attached to the movable body, and FIG. 9 is a perspective view of the pulley. It is a perspective view which shows the modification example of the 1st fitting element attached to the side. 2... Sheet mounting plate as a moving body, 5... Wire, 6, 7, 8, 9, 10, 11... Pulley,
19, 20...first mating element, 21,22...second
Fitting element, 24...Slit groove for engaging the first fitting element,
27, 28... Slit grooves for engaging the second fitting.

Claims (1)

[Claims] 1. A wire having rigidity for moving a moving body in a linear direction; and the wire is stretched in the direction of movement of the moving body.
a plurality of pulleys, a first fitting that is firmly fitted to one end and the other end of the wire, and a first fitting that is firmly fitted to the middle part of the wire having a predetermined distance from one end or the other end of the wire; a second mating element; a first mating element engagement slit groove provided on at least the drive-side pulley among the pulleys, into which the first mating element can be freely inserted and removed; and a second mating element provided on the movable body. has a removable second mating element engaging slit groove, and by engaging the first and second mating elements with the first and second mating element engaging slit grooves, respectively, the movable body A positioning and locking device for a moving body, characterized in that the positioning is performed at the midway point. 2. The positioning and locking device for a movable body according to claim 1, wherein the first and second fittings are spherical.