JPS6088268A - Driving apparatus - Google Patents

Abstract

PURPOSE:To permit the drive independent from load by installing an individual driving output part corresponding to each driven part between a single driving input part of a copying machine, etc. and a plurality of driven parts driven by said driving input part and connecting the output part with the input part. CONSTITUTION:Each driving force is transmitted into the table operating part of a copying machine in one part and into a photosensitive drum and a paper feed operation part on the other through each driving output part by the operation of a driving input part including an input gear 9 driven by a motor. Each driving output part is equipped with the driving units 19 and 20 pivotally supported onto fixed supporting frames 17 and 18, and transmits the driving force supplied form transmissin gears 23 and 24 to the intermediate gears 13 and 14 connected to the respective operation parts. Each unit 19, 20 is equipped with coaxially the corresponding gear 31, 31' engaged with the intermediate gear 13, 14 and each disc-shaped spacer 32, 32' at the top edge side of a swingable lever 28, 28', and each lever 28, 28' is urged in one direction by a spring 33, 33'.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a drive device that drives a plurality of internal mechanisms of an apparatus such as a copying machine from a single drive input section directly connected to a drive source such as an electric motor. .

[Technical background and problems of the invention]

For example, when a lateral drive device is used in a copying machine, the driven parts include a document platen actuating part, a photoreceptor drum actuating part,
Alternatively, it has a sheet feeding operation section, etc., and is configured to transmit driving force to these driven sections from a single drive input section via a drive output section.

That is, in the conventional configuration, a single drive input part is used as a common drive output part, for example, an intermediate gear with a recessed support shaft of the photoreceptor drum, and firstly, the intermediate gear is drivingly connected to the intermediate gear, and the photoreceptor is transferred from this intermediate gear. Outputs were obtained from individual operating systems such as the drum operating section, document table operating section, paper feed operating section, etc. However, in this conventional configuration, the self-defense state of the driven section is all transmitted to a common drive output section. Therefore, there is a problem in that fluctuations in the drive output section do not adversely affect the operation of other driven sections.

In particular, in the case of a copying machine, for example, an unsteady load is transmitted to the ridges of the moving table that reciprocates on the main body while the document table is copying, and this causes constant stable operation of the photoreceptor drum, paper feeder, etc. This vibration is transmitted to the driven parts of the drum shaft, causing problems such as hindering accurate image formation on the drum and disrupting the precise timing of paper feeding.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and its purpose is to solve the problem of steady or unsteady loads generated by a plurality of driven parts that obtain driving force from a single input drive part. The object of the present invention is to provide a drive device that can always perform stable driving without mutually affecting each other.

[Summary of the invention]

In order to achieve such an objective, in the present invention.

Basically, between a single drive input part and a plurality of driven parts, for example, first and second driven parts, which obtain driving force from the single drive input part,
Separate first and second drive outputs are provided corresponding to the first and second driven part traps, and these individual drive outputs are configured to be drivingly coupled to a single drive input.

[Embodiments of the invention]

Embodiments of the present invention shown in the drawings will be described in detail below. The illustrated embodiment shows a mode in which the drive device of the present invention is implemented in a moving table type copying machine.

In FIG. 1, 1 is the main body of the copying machine, 2 is a table forming a document table that moves back and forth on the main body 1 as shown by the chain line every time a copy is made, and 3 is shown by the broken line rotatably provided in the center of the figure. photosensitive drum.

4 is a support shaft of the drum 3, 5 is an electric motor without a power source, 6 is a table actuator having a clutch mechanism for reciprocating the table 2, and 7 is a copy sheet (not shown) inserted into the main body IK. ) toward the drum 3, and includes a plurality of conveyance rollers that feed the paper.

In this structure, the driving force of the electric motor 5 is transmitted through a drive input section 10 consisting of an input gear 9 directly connected to the motor shaft 8.
, the intermediate individual drive outputs 11.12 as detailed below.
On the one hand, the driving force is transmitted to the table operating section 6, and on the other hand, the driving force is transmitted to the photosensitive drum 3 and the paper feed operating section 7.

The drive system of the table actuator 6 is connected to the table 2 via a series of gear trains and a timing belt, and is subjected to the shock generated by the reciprocating movement of the table 2 as an unsteady load. This operating section 6 constitutes a first driven section that generates an unsteady load. Further, the paper feeding operation section 7 also forms a drive system with a series of gear trains, and is subjected to a steady load during paper feeding operation. Here, the paper feed operation section 7 and the photosensitive drum 3 are considered as second driven sections that generate a steady load.

The intermediate individual drive output 11.12 has a large-diameter intermediate gear 13.14 coaxial with the drum shaft 4, one gear 13
is rotatable on the drum shaft 4 and meshes with a corresponding gear 15 of the table operating section 6. The other intermediate gear 14, which is only partially shown in FIG. 1, meshes with a corresponding gear 16 of the sheet feeding actuator 7 and is fixed to the drum shaft 4. The axial positional relationship of these rain intermediate gears 13.degree. J4 is such that they are slightly spaced apart from each other as shown in FIG.

That is, the -force intermediate gear 13 belongs to the first drive output part 11 corresponding to the first driven part, and the other intermediate gear 14
The first and second drive output sections 11 and 12 belong to the second drive output section 12 corresponding to the second driven section. (Fig. 3), independently suspended drive units 19 and ?
17 (Figure 3 of the building). Each of these drive units l9I2Q meshes with a single input gear 9, and is rotatably supported by each support frame 17.1B via a support shaft 21.21. (Fig.) are connected so as to receive driving force from them.

This drive unit 19.20 and the transmission gear 23.24 respectively correspond to the first and second intermediate gear 13.
．． 12 are configured. In addition, in Figure 1, 4! For the r gear, only the meshing pitch circle is shown by a solid line.

With reference to FIGS. 2 and 3, the structure of the drive unit F 19t20 and the drive connection between them and the input gear 9 will be further explained.

In FIG. 2, a drive unit 19 mainly belonging to the first drive output section 11 is shown, and a drive unit 20 belonging to the second drive output section 12 is the same as the unit 19. The structure is just juxtaposed behind the unit 19 in FIG. 2. This can be seen especially from the side view shown in an exploded state in FIG.

After assembling the unit 19 + 2' onto each support frame 17, 1B, as shown in FIG. The support frame is attached and fixed to the main body I of the apparatus with bolts 26. The input gear 9 is also supported by the support frames 17 and 1B via the support shaft 8. Since both drive units 19 and 20 have the same structure as described above, only one unit 19 will be described below.

The unit 19 includes a lever 28 which is swingably supported on the support frame 17 by a pivot shaft 27, a corresponding transmission gear 29 which is rotatably supported by the pivot shaft 27 and meshes with the transmission gear 23, and a lever. A corresponding gear 3 rotatably supported by a support shaft 30 provided at the free end of 28 and anastomosed with the intermediate gear 13 on one side and the transmission gear 29 on the other side.
) and %A disc-shaped spacer 32 is supported on the support shaft 30 in line with the gear 31, and the lever is moved so as to constantly urge the lever 28 counterclockwise around the pivot shaft 27 in FIG. The spring hook consists of a coil spring 33 that is stretched between the portion 214a and the support frame 17 and constitutes a spring means.

The spring 33 uses its biasing force to bias the corresponding gear 31 in the direction of meshing with the intermediate gear 13; The resultant force of the reaction force at 5 and lever 2
The size is set to be enough to overcome the gravity of 8 itself.

For each gear in FIG. 2 and FIGS. 4 and 5, which will be described later, the meshing pitch circle is shown by a dashed line and the tip circle is shown by a solid line, but the specific tooth profile is omitted as in FIG. 1.

With this configuration, when the input gear 9 rotates in the direction of the arrow in FIG. It is transmitted to the intermediate gear 13 and rotates the arrow 13 in the direction of the arrow.

The spacer 32 serves to maintain the axial position of the gear 31 and, together with the spacer 32' juxtaposed with the corresponding gear 31' of the other unit 20, to regulate the distance between the gears 31 and 31'. In addition, both spacers 32, 32'
The number of parts can be reduced by forming the levers 211, 28' and the corresponding levers 211, 28' respectively, and by making the contact portion with the gear corresponding to the spacer made of plastic, for example.

When the components on the support frame 17 including the drive unit 19 having such a configuration are assembled into the apparatus main body 1, they are elastically pressed by the tin ring 33 so as to mesh with the intermediate gear 13.

In such a suppressed meshing state, in the present invention, as shown in FIG. It is set so that the center (pivot point) Q of the pivot shaft 22 is approximately located on the extension of MA. However, in this case, the reaction force P causes the lever 2 to
8 is subjected to a torque in the direction of swinging in the 1F direction against the spring 33. Therefore, when the reaction force P is an impact load, the corresponding gear 31 moves in a direction away from the intermediate gear 13 and the impact is not transmitted to the input gear 911111K.

In any case, if the line of action A is designed to pass on or near the pivot point Q, the impactful reaction force from the intermediate gear 13 side will be absorbed by the shaft 27 at the pivot point Q, approximately in total 5Σ. Se゛−ζ′? The influence of the reaction force on the input shaft 9 and the motor 5 can be reduced. Note that the line of action A is the center M of the intermediate gear 13.
The center R is also in the direction perpendicular to the perpendicular line drawn at the pressure angle α, passing through the intersection S of the pitch circle of both gears and the line B connecting the center of the corresponding gear 31. In other words, the center R of both gears is It is a line that makes a pressure angle α with respect to the tangent line. In this embodiment, the pressure angle α is set to the standard angle of 20 degrees for a normal spur gear.

As described above, since the structure is as described in the embodiment, when the table actuating section 6 receives a load, for example, an impact at the time of return, in response to the reciprocating movement of the table, the load is applied to the output of the first drive wheel 11. is transmitted to the intermediate gear 13 of the section 11,
It further corresponds to a drive unit 19 and a transmission gear 23
is transmitted to the input gear 9 via. However, as mentioned above, in addition to the drive unit 19 acting to reduce the load, since the input gear 9 is directly connected to the motor 5, the inertia of the motor is used to absorb this load. It's Nishide. Therefore, even if a slight load is applied as a reaction force, the input gear 9 itself directly connected to the motor is stable. Further, since the input gear 9 itself is long in the axial direction as shown in FIG. 3, it has sufficient inertia. Therefore, other drive systems, ie, the second drive output section 12, are not affected by vibrations or the like due to the load.

That is, the first and second drive output sections 11.12 are each provided as an individual drive system, and are configured to mesh with the single human power gear 9 directly connected to the motor, so that each output section 11.12 The load received from the corresponding first and second driven parts is directly transmitted to the input gear 9, where it is absorbed using sufficient inertia of the motor, and furthermore, a Since it is partially supported by the independent suspension drive unit, it is possible to avoid adverse effects such as vibration from one side of the two river crests 11, 12 to the other.

In addition, as a modified example, as shown in FIG.

The lever 2B' of the other drive unit 20 is extended by 1 fC, and the corresponding gear 31' and the transmission gear 29' are connected by the sprocket 40, 41 and the chain belt 42, and the support shaft is different from that of the intermediate gear 13. A configuration in which the corresponding gear 31' meshes with another intermediate gear 14' is also possible, and a forced drive means such as a chain belt may be interposed in the gear train.

In the modification shown in FIG. 6, 43 is a belt chain/eye 2-144 which is pivotally supported by the lever 28'. It's a spring.

〔Effect of the invention〕

As described above, according to the present invention, the drive output section corresponding to each driven section is individually provided and connected to a common drive input section, and the unsteady load from the driven section is also input to the drive. Since the load is carried and absorbed by the drive output section, there is no influence of +11+ dynamic load from one drive output section to the other, so the stability of the operation of each driven section can be maintained at all times.
The effects are extremely large, such as being able to improve the reliability and functionality of the entire device.

[Brief explanation of drawings]

The drawings show aspects of an embodiment in which the transmission device of the present invention is embodied in a copying machine, and tla is a partially broken vertical sectional view of the copying machine, and FIG. 2 is an enlarged view of the main part of FIG. 1. 3 is a side view showing FIG. 2 in an exploded state when viewed from the right side, and FIG. 4 is an explanatory diagram of the configuration of FIG. 2. FIG. 5 is a diagram showing a modification of the embodiment of the present invention. 6...Table operating section, 7...Paper feed operating section, 9...
・Drive input gear, 10... Drive input section, 11.12.
... Drive output section, 19.20... Drive unit, 28
．． 28'...Lever.

Claims (6)

[Claims] (1) A single drive input section, a first driven section, and a second
a first drive output section drivingly coupling the ml driven section to the single drive input section; and a second drive output section provided separately from the first drive output section. and a second drive input drivingly coupling the drive to a single drive input. (2) The drive device according to claim 1, wherein the single drive input section has an input gear directly connected to an electric motor. (3) The first and second drive output units include a lever pivotally supported by an intermediate gear and a device frame, and a corresponding gear rotatably supported by the lever and meshing with the intermediate gear. 3. The drive device according to claim 1, comprising: and a spring means for biasing the spiral gear toward the intermediate gear. (4) The pivot point of the lever is located on the extension of the line of action that exerts a force from the intermediate gear on the corresponding gear at the anastomosis between the intermediate gear and the corresponding gear. Drive device. (5) At the meshing part between the intermediate hour wheel and the corresponding gear, the pivot point of the lever should be brought close to the extension of the line of action that exerts a force from the intermediate gear on the corresponding gear, and the lever should also be caused to respond by the force. Claim 3: The gear is swingable so as to be detached from the intermediate gear against the flipping means.
Drive device a port described in section (6) A chain/branch between the corresponding gear and the single drive input section
Drive device 0 according to claim 3, each comprising a belt transmission means.