JPS5936251B2 - Copy machine slider drive control mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a slider drive control mechanism for a copying machine.

2. Description of the Related Art In a copying machine equipped with a moving original table, a so-called slider, the slider is moved in synchronization with the rotation of a photoreceptor drum.

Some slider drive devices use the drive mechanism of the photoreceptor drum as the drive source, from the viewpoint of ease of synchronization with the photoreceptor drum, design such as number of parts, and cost. An example of a copying machine equipped with the above-mentioned slider drive device will be described with reference to FIG.
has a transparent document placement plate, and shows a slider that moves forward in the direction of the arrow and backward in the opposite direction.

When a document is placed on the slider 1 and a print button (not shown) is pressed, the photosensitive drum 3 begins to rotate in the direction of the arrow a, and in conjunction with this, the slider 1 moves forward in the direction of the arrow. The surface of the photosensitive drum 3 charged by the main charger 4 is irradiated with an image of a document (not shown) by an optical system 6 consisting of a light source lamp 5 and a focusing light transmitter, and electrostatic latent material is generated. An image is formed. After this electrostatic latent image is visualized by the developing device 7, it is brought into close contact with a transfer paper (not shown) supplied from the paper feeder 8, and is transferred to the transfer paper by the transfer charger 9. be done.
The transfer paper onto which the visible image has been transferred is transported by the conveyance device 10.
After being peeled off from the photosensitive drum, it is sent to a pressure fixing device 11 where a visible image is fixed thereon, and sent out as a copy by a pair of discharge rollers 12 to the outside of the machine. On the other hand, after the transfer, the photosensitive drum 3 has the residual charge on its surface removed by the static eliminator charger 13, rotates one more time, and produces a copy at exactly two rotations from the charging start position. is obtained. The slider 1 described above moves forward in the direction of the arrow, and after exposure by the optical system is completed, moves back in the opposite direction to return to the initial position.

Here, a specific configuration example for reciprocating the slider 1 based on the above-described process will be described below. That is, in FIG. 1, the slider 1 is supported in a reciprocating manner with respect to the main body of the copying machine. FIG. 2 shows an example of the support system. The slider 1 is supported by bearings 16 and a large number of sliding balls 17 on both side plates 14 and 15 of the copying machine main body. It can be moved freely with a very light load while its movement in the left and right directions is restricted. In FIG. 4, the shaft 18, which is disposed below the optical system 6 (see FIG. 1) and has the photoreceptor drum 3 fixed thereto, is attached to the side plates 14, 15 (see FIG. 2).
It is rotatably supported via bearings 19 (one not shown). The right end of the shaft 18 when viewed from the left in FIG.
A forward gear 22 is mounted which is substantially integrated with the forward gear 22. As shown in FIG. 5, the gear 22 is provided with a rotating member 23 integrally or substantially integrally with the rotating member 23.
A locked portion, ie, a recessed portion 23a, is formed at one location on the circumferential surface of 3, and is engaged with a locking member to be described later. In FIG. 4, an operating rotating member 25 is rotatably supported at the right end of the shaft 18 via a bearing 24, and the member 25 and the wire drum 26 are substantially integrated with each other by a screw 27. ing. A relatively long wire 28 is wound in double rows around the circumference of the wire drum 26, and as shown in FIG. . Then, one end of the wire 28 is connected via a pulley 31 as shown in FIG.
The pin 32 on the left end side of the slider 1 is connected to the spring 3 on the other end.
3 to the pins 34 on the right end side. In FIG. 4, the large diameter boss portion 2 of the operating rotating member 25 is shown.
A double-acting gear 36 is loosely engaged with the small-diameter boss portion 25b, and a disk cam 37 as shown in FIG.

In FIG. 5, the flange portion 25c of the operating rotating member 25
The boss portion 41a of the bushing body 41 is fitted into the mounting hole 25d bored in the mounting hole 25d, and the bushing body 41 is held in an immovable state by a screw 42. Another boss portion 41b of the bushing body 41 is fitted into a hole 36a of the reciprocating gear 36, which has a larger outer diameter than this boss. The locking member 43 on the forward gear 22 side is integrally inserted into the shaft hole of the bushing body 41.
A fixed shaft 44 is rotatably fitted to the coaxial shaft 44.
4, a forward/reverse switching lever 45 having a bent piece 45a at the end of the arm is fixed as shown in FIG.
Further, a pin 45b implanted at the end of one arm of the forward/reverse switching lever 45 is fitted into a long hole 36b bored above the hole 36a of the double-acting gear 36. In FIG. 5, a recess 37a (see FIG. 6) is formed at one location on the circumferential surface of the disc cam 37, and a stopper 46 is fixed to a portion corresponding to the recess 37a.

A bent actuating piece 45c extends from the other arm of the forward/reverse switching lever 45 at a close portion of the concave portion 37a of the disc cam 37 on the opposite side from the stopper 46 (see FIG. 6). - The arm end has a pin 47a that can be freely engaged with and detached from the recess 37a and the actuation piece 45c, and the actuation lever 47, which is pivotally connected to the shaft 48, is rotated to the right around the shaft 48 by the elastic action of a spring 49. Habits are given. A release piece 47b bent toward the double-acting gear 36 is formed at one arm end of the operating lever 47, and a first solenoid 51 is connected to the other arm end of the lever 47. Further, in FIG. 5, a drive mechanism for driving the forward gear 22 is provided at the lower part of the forward gear 22, and a chain 52 is connected from the drive source to the forward gear 22.
, the gear 54 rotates via the sprocket 53, and the forward gear 22 rotates in the same direction as the arrow a direction of the photosensitive drum 3 rotating together with the intermediate gear 55 and the gear 56 driven thereto. It's getting old. In contrast to the forward drive mechanism z, which is composed of a series of gears including the forward gear 22 described above, the backward drive mechanism for moving the document table back is configured as follows. That is, double-acting gear 3
A lever 58 is disposed at the bottom of the lever 6 and is pivotally connected to a shaft 57 to which an intermediate gear 55 on the forward drive mechanism side is fixed.
A gear 59 is fixedly attached to the shaft 57, and the gear 62, which is also attached to the lever 58, is separated from the double-acting gear 36 through an intermediate gear 61 which is engaged with the gear 59 and which is attached to the lever 58. It is designed to rotate in the direction of the arrow jζ. A second solenoid 62 is connected to another arm end of the lever 58 . The lever 58 has a spring 6
4 provides a right-handed rotational behavior about the shaft 57, and this behavior holds the gear 62 in a position away from the reciprocating gear 36. Now, in FIG. 5, when the printing button (not shown) is pressed to start the copying operation, the drive motor (not shown) starts rotating, and the single drive system from the chain 52 to the gear 56 moves the double-acting gear 22 into the recessed part. Rotating member 23 having 23a
At the same time, it rotates in the direction of the arrow, and the photosensitive drum 3 also rotates in the same direction.

At the same time, the gear 62 on the backward drive mechanism side rotates in the direction of the arrow in a state separated from the double action gear 36, and the arrow wheel 62 also separates from the double action gear 36. FIG. 6 shows the above-mentioned state, in which the rotating member 23 having the recess 23a is rotating in the direction of the arrow. When the first solenoid 51 is energized in this state, the operating lever 47 rotates to the left around the shaft 48 against the elasticity of the spring 49, and the pin 47a of the lever 47 is connected to the disk cam 37 as shown in FIG. recess 37
move away from a. Then, the forward/reverse switching lever 45
The locking claw 43a of the locking member 43 fits into and engages with the recess 23a of the rotating member 23. That is, the locking member 43 is given the habit of turning in the direction in which the locking pawl 43a engages with the recess 23a, and this behavior is normally blocked by the pin 47a of the operating lever 47.
By the way, the above-mentioned rotational behavior of the locking member 43 is performed as follows. That is, in FIG. 5, a pin 26b is provided on the side wall 26a of the wire drum 26, and a pin 26b is provided on the side wall 26a of the reciprocating gear 36 on the wire drum 26 side.
Another pin 36c is implanted in each case (see FIG. 4). A tension spring 65 is applied between these two pins, and the elasticity of this spring 65 moves the reciprocating gear 36 clockwise around the shaft 18 in FIG. I'm trying to rotate them clockwise. This rotation is prevented in the following manner. That is, in FIG. 7, the inner peripheral edge of the hole 36a formed in the double-acting gear 36 on the left side in the figure presses against the boss portion 41b of the bushing body 41 due to the elasticity of the spring 65. In this state, if you push the oblique edge of the operating piece 45c of the forward/reverse switching lever 45 and turn the lever 45 to the left around the shaft 44 to the position shown in FIG. 6, then the pin 45b of the lever 45
presses the left side edge of the elongated hole 36b of the double-acting gear 36, causing the gear 36 to rotate around the shaft 18, specifically around the large-diameter boss 25a of the actuating rotating member 25 in FIG. Rotate only the corner counterclockwise. Then, the spring 65 is expanded according to this rotation angle. FIG. 8 shows these relationships. When the forward/reverse switching lever 45 is rotated by an angle α around the shaft 44, that is, when it is rotated from the position shown in FIG. 7 to the position shown in FIG. , the reciprocating gear 36 rotates counterclockwise around the shaft 18 by a rotation angle θ, and the spring 65 expands accordingly. Note that in the figure, line AA indicates the center locus of the hole 36a of the double-acting gear 36. As shown in FIG. 6, due to the rotational movement of the double-acting gear 36,
The boss portion 41b of the bushing body 41 comes into pressure contact with the right inner peripheral edge of the hole 36a of the reciprocating gear 36. In this way, the double-acting gear 36 is charged with a force acting to rotate it clockwise due to the elasticity of the stretched spring 65, and in FIG. 6, the pin 47a of the operating lever 47 When the pin 47a leaves the recess 37a as shown in FIG. 7, that is, the restraint of the pin 47a to the clutch lever 45 is released, the double-acting gear 36 is moved clockwise by θ due to the elasticity of the spring 65 mentioned above. It rotates and assumes the position shown in FIG. Along with this, clutch lever 14
5 is also pivoted clockwise around axis 44 by an angle α, also taking the position shown in FIG. Here, in FIG. 6, when the print button is pressed and the drive motor starts rotating via a control circuit (not shown), the forward gear 22 and rotating member 23 mentioned above rotate in the direction of the arrow, and the main When the gear is turned on, the first solenoid 51 is energized, so that the operating lever 47 is rotated to the left around the shaft 48 against the elasticity of the spring 49, and the pin 47a is rotated to the left. is separated from the concave portion 37a of the disk cam 37.

Then, the forward/reverse switching lever 45 tries to rotate to the right around the shaft 44, and the locking pawl 43a of the locking member 43, which is substantially integral with the lever 45, comes into pressure contact with the circumferential portion of the rotating member 23 and Recessed portion 23a of rotating member 23 where 43a is already in a rotating state
When fitted, the pawl 43a engages with the recess 23a as shown in FIG. At the same time, as shown in FIG. 5, the locking member 43, the bushing body 41, and the forward/reverse switching lever 45 all rotate clockwise in a state in which they exactly revolve around the shaft 18. As the bushing body 41 revolves, the actuating rotating member 25 rotates, and the wire drum 26 and disc cam 37, which are substantially integral therewith, rotate clockwise. That is, the wire drum 26 rotates in the direction of the arrow, and moves the slider 1 forward in the direction of the arrow b via the wire 28. Further, the forward gear 36 also follows the revolution movement of the boss portion 41b of the bushing body 41, and the wire drum 2
Rotate in the same direction as 6. In FIG. 7, the operating lever 4 is rotated by the clockwise rotation of the disc cam 37 as described above.
The pin 47a of No. 7 is placed on the periphery of the disc cam 37 and pressed against the periphery by the elasticity of the spring 49 (see Fig. 6), and the disc cam 37 continues to rotate while maintaining this state. , to reach the position shown in FIGS. 9-10. That is,
In FIG. 9, the bent piece 45a of the forward/reverse switching lever 45 is connected to the actuating rotating member 25 (
As the actuating lever 4 rotates clockwise (see Fig. 5),
It abuts against the side edge 47c of the release piece 47b of No.7. Figure 10 shows exactly this state, and in the same figure, the disk cam 3
7 further rotates, and as this rotates, the beveled edge 46a of the stopper 46 is moved over the actuating lever 47.
Push up the pin 47a of the lever 4 as shown in FIG.
7 is slightly rotated to the left around the axis 48 against the elasticity of the spring 49. At this time, the release piece 47b of the operating lever 47 moves the forward/reverse switching lever 45, where the bent piece 45a comes into contact with the side edge 47c (see FIG. 9) of the release piece 47b, from FIG. 10 to FIG. Rotate the locking member 43 to the left around the shaft 44 (see FIG. 12) to the position shown, and rotate the locking member 43 to the left in the same direction. The locking claw 43a is separated from the recess 23a. In this state, the wire drum 26 (see FIG. 5) stops rotating, and at the same time, as shown in FIG. It stops at a position moved by a distance S, which is the width plus the maximum document length.In the above-mentioned state, the slit exposure for the document image of the document is completed, and this signal is captured and the second solenoid 62 is activated as shown in FIG. is now excited, and along with this, the lever 58
rotates to the left around the shaft 57 against the elasticity of the spring 64, and the gear 62 of the lever 58, which has been kept in a position separated from the reciprocating gear 36 and is rotating in the direction of the arrow, is shown in FIG. It meshes with the double-acting gear 36.

Then, the gear 36 begins to rotate in the opposite direction to the previous rotation direction, that is, in the counterclockwise direction. Then, as shown in FIG. 12, the boss portion 41b of the bushing body 41 that comes into contact with the inner peripheral edge on the right side of the hole 36a of the double-acting gear 36 is connected to the gear 36.
The rotating member 25, the wire drum 26, and the disc cam 37 rotate counterclockwise as a unit, as shown in FIG. That is, the wire drum 26 rotates in a direction opposite to the direction indicated by the arrow in the figure, and by reversing the wire drum 26, the slider 1 is moved to the position indicated by the chain line via the wire 28 and the pulley 31 as shown in FIG. From there, return to the starting position and return. Here, in FIG. 11, the disc cam 37
By the above-mentioned counterclockwise rotation, the actuating lever 47
The pin 47a extends from the oblique edge 46a of the stopper 46 to the thirteenth pin 47a.
As shown in the figure, it transfers to the circumferential surface of the disc cam 37. At this time, the bent piece 45a of the forward/reverse switching lever 45 moves away from the release piece 47b of the operating lever 47, and the 12th
In the figure, the forward/reverse switching lever 45 attempts to rotate clockwise around the shaft 44 due to the elasticity stored in the spring 65.
That is, although the locking pawl 43a of the locking member 43 tries to fall into the recess 23a of the rotating member 23, the rotating member 23 remains independent even when the engagement operation between the locking member 43 and the locking member 43 is released. Therefore, as shown in FIG. 13, the locking pawl 43a moves away from the recess 23a and transfers to the circumference of the rotating member 23 while being in pressure contact with the periphery of the rotating member 23, and as shown in FIG. A falling motion cannot occur.
Then, the disk cam 37 rotates from the position shown in FIG. 13 to the position shown in FIG. It falls to 37a. By the way, the 6th
In the figure, a toothless portion 36d in which a predetermined number of teeth are notched is provided at one location on the circumference of the double-acting gear 36. When the gear 36 rotates counterclockwise, the notch portion 36c
When the gear 36 reaches the position shown in the figure, or when the gear 36 rotates further and reaches a position corresponding to the drive side gear 62, the mesh is disengaged and the rotation of the driven side double-acting gear 36 is stopped. In this state, as described above, the operating lever 47
The pin 47a falls into the recess 37a of the disc cam 37 as shown in FIG. revolves from the position shown in FIG. 14 to the position shown in FIG.
By contacting the slider 7a, the slider 1 is regulated at the starting position. During this time, in other words, in FIG.
When the transmission relationship is broken, as shown in FIG. 5, the second solenoid 62, which maintains the excitation effect on the electric circuit from the time of initial energization, is de-energized. As a result, the lever 58 rotates to the right around the shaft 57 due to the elasticity of the spring 64, and separates from the toothless portion 36d of the double-acting gear 36, as shown in FIG. In addition, in FIG. 6, the pin 47a of the actuation lever 47 is located in the recess 3 of the disc cam
Since it is in a depressed state at 7a, the city member 43
The engaging claw 43a is connected to the recess 2 of the rotating member 23 in a rotating state.
3a will not fall unless the first solenoid 51 (see FIG. 5) is energized. As described above, when the double-acting gear 36 reverses, the locking pawl 43a of the locking member 43
It is impossible for the rotary member 23 to engage with the concave portion 23a of the rotating member 23, so it can be said that the drive device has an extremely safe function. Note that one copy is obtained when the photosensitive drum 3 rotates twice, and at the same time, the forward gear 22 and the rotating member 23 (see FIG. 5), which are in a normally rotating state, stop. As described above, the slider drive device that moves the slider forward when the forward gear that rotates the photoreceptor drum makes one rotation, and moves the slider backward when the gear enters the second rotation, is used to move the slider back and forth. Since the switching of the motion is performed mechanically, it has the advantage that the operation is reliable.

In the slider drive device described above, switching between forward and backward movement of the slider is performed by the forward/reverse switching lever 45 acting as a clutch lever and the double movement mechanism (see lower right in FIG. 5). It will be done. That is,
At the end of forward movement of the slider, the forward/reverse switching lever 45
However, as shown in FIGS. 10 to 12, after engaging the actuating lever 47 and disengaging the double-acting gear 36 (drum 26) from the rotating member 23, the double-acting gear 36 is moved back. In other words, the wire drum 26 is reversed and the slider 1
is back in action. By the way, the slider 1 is connected to the drive device by the wire 28, and when the forward/reverse switching lever 45 engages with the operating lever 47 and the wire drum 26 stops, a considerable impact is generated due to the inertia. be stopped.

Therefore, at the end of exposure, so-called at the end of forward movement of the slider 1, a shock is applied not only to the slider but also to the copying machine itself. This appears not only as an impact sound when the slider stops, but also as unnecessary vibrations to the copying machine body. Further, the operating lever 47 is connected to a first solenoid 51, and as shown in FIG.
When the solenoid 51 is actuated while the pin 47a is depressed into the recess 37a, the pin 47a swings in a direction to escape from the recess 37a, and after the solenoid 51 is de-energized, the state shown in FIG. The pin 47a is brought into contact with the circumferential surface of the disc cam 37 as shown in FIG.

The release piece 47 of the operating lever 47 in this state
In b, the bent piece 45a of the forward/reverse switching lever 45 is
The lever 45 and the operating lever 47 will not engage if the first solenoid 51 is not de-energized for some reason. This means that the so-called clutch will not be severed. If the clutch is not disengaged, there is a risk of damage to the drive unit itself. SUMMARY OF THE INVENTION An object of the present invention is to provide a slider and a drive control mechanism that absorb the shock of the slider at the end of forward movement and ensure the operation of the forward/reverse switching lever.

According to the present invention, in the slider driving device as described above, a stopper pin is provided at the rear end of the slider, and the pin is provided at the terminal position of the rear end of the slider on an immovable side plate of the copying machine main body. This is achieved by providing resiliently abutting slider stops.

Further, by positioning the slider stopper on the rotation locus of the forward/reverse switching lever, the purpose of reliably operating the lever can be achieved. The present invention will be explained below with reference to illustrated embodiments.

In addition, in the following description, the same reference numerals are attached to the same members as those in the conventional example described above, and individual descriptions will be omitted. In FIGS. 15 to 17, a slider stopper 100 is mounted on an immovable side plate 15 with headed pins 101 and 10.
2, it is slidably mounted in the range of the elongated holes 100a and 100b in the longitudinal direction, in other words, in the moving direction of the slider 1.

The bent portion 100c of the stopper 100 and the headed pin 101
A tight spring 103 is stretched between the
The stopper 100 is given the habit of moving in the opposite direction to the forward movement direction of the slider (direction of arrow b). Also,
The bent abutment portion 100d of the slider stopper 100 is connected to a stopper pin 10 fixed to the rear end portion 1a of the slider 1.
It is located above the movement path 0 of No. 4.

It goes without saying that this stopper pin 104 is provided at a position where it does not interfere with the wire 28 for driving the slider 1 (see FIG. 3). The abutting portion 100d of the stopper 100 extends downward after being bent.

This hanging part is the forward/reverse switching lever 4 of the slider drive device.
5, and forms a release piece 105. When the print button is pressed to start the copying operation, the forward/reverse switching lever 45 of the slider 1 driving device rotates in the direction of the arrow as shown in FIG. 18, and the slider 1 moves in the direction of arrow b. Move back and forth.

When the bent piece 45a of the forward/reverse switching lever 45 engages with the release piece 105, the lever 45 is rotated counterclockwise about the pivot shaft 44, and the locking member 4, which is substantially integrated therewith, is rotated counterclockwise about the pivot shaft 44.
3 and the rotating member 23 (see FIGS. 5 and 11). As a result, the transmission of the driving force to the slider 1 in the forward movement direction is cut off. The slider 1 whose driving force has been cut off tries to move further in the direction of the arrow b due to inertia, but the stopper pin 104 does not reach the abutting portion 100d of the slider stopper 100, as shown in FIG.
It collides with and stops. The conflict between these two is elastic. That is, when the pin 104 collides with the stopper 100, the stopper 100 is pushed against the elasticity of the spring 103, and elastically stops the pin 104.
That is, at the end of the forward movement of the slider 1, the stopper pin 104 resiliently collides with the stopper 100 and is stopped, so that the slider 1 is stopped without receiving any shock.

As described above, according to the slider and drive control mechanism of the copying machine of the present invention, the shock at the end of the forward movement of the slider is absorbed, and the forward/reverse switching lever of the slider drive device is reliably operated by the same member. can be activated.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view showing an example of a copying machine equipped with a slider, Fig. 2 is a side sectional view showing the relationship between the slider and the main body of the copying machine, and Fig. 3 is a front sectional view showing the reciprocating movement of the slider. Figure 4 is a vertical cross-sectional view showing an example of the slider and drive device, Figure 5 is an exploded perspective view of the same as above, Figure 6 is a front view of the same as shown in the starting position, and Figure 7 is immediately after the start of forward movement. 6th in
Fig. 8 is a diagram explaining the rotation of the forward/reverse switching lever and its related relationship with the double-movement gear, and Fig. 9 is a diagram of the slider 1 drive device when the slider is in the forward movement state. The front view, FIG. 10 is the operational view of FIG. 9 showing the state of the slider just before the end of forward movement, FIG. 11 is the operational view of FIG. 10 showing the state of the slider at the end of forward movement, and FIG. 12 is the operational view of FIG. Figure 11 is a front view of the main parts showing the relationship between the forward/reverse switching lever, the hole of the double gear, and the boss of the bushing body in the state shown in Figure 11, and Figure 13 shows the slider drive device in the state where the slider has started to move backward. 14 is an operational view of FIG. 13 showing the state just before the end of the return movement of the slider, FIG. 15 is a side view showing one embodiment of the present invention, FIG. 16 is a perspective view of the same, and FIG. The figure is a partially cutaway plan view of the same as above, FIG. 18 is a front view of the main part showing the state of the slider just before the end of forward movement, and FIG. 19 is an operational view of FIG. 18 showing the state of the slider just before the end of forward movement. 1...Slider, 45...Forward/reverse switching lever, 100...Slider stopper, 10
4...Stopper pin, 105...Release piece.

Claims (1)

[Claims] 1. In a slider drive device of a copying machine that reciprocates a slider by a slider drive mechanism that rotates once in forward and reverse directions in synchronization with the rotation of a photoconductor drum, a stopper pin provided at the rear end of the slider, and this stopper pin A slider drive control mechanism comprising a slider stopper provided at a forward movement end of the slider drive mechanism and resiliently engaged with a forward/reverse switching lever of the slider drive mechanism and the stopper pin.