JPS60207162A - Electrifier supporting device of copying machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a charger support device in a copying machine.

In a sub-U1 copying machine, a charging device, such as a corona discharger for transfer, is sometimes placed below a photoreceptor, which is an object to be charged.

In this case, there are those in which the charger is screwed onto the lower machine frame, which is divided into two vertically, and those in which the charger is inserted diagonally into a hook provided on the lower machine frame. There was a problem in that it was troublesome to install and remove.

In addition, there is a system in which a dedicated rail member is installed in the machine frame so that the charging machine can be inserted into and taken out from the side of the machine frame rather than from above, but this has the disadvantage that the structure is complicated and the number of parts increases.

In either case, the conventional copying machine has a problem in that the support device for the charger disposed below the object to be charged has poor workability and is complicated.

Shell-Top The present invention aims to solve the above-mentioned conventional problems. In particular, it is an object of the present invention to solve the above-mentioned problems caused by fixing the charger in order to keep the distance of the wire of the charger to the object to be charged within a predetermined tolerance.

BEST MODE FOR CARRYING OUT THE INVENTION A structure according to the present invention that achieves the above object will be explained in detail based on an embodiment shown in the drawings.

In Figure 1, the upper machine frame 2 is indicated by arrow 3 relative to the lower machine frame 1.
An example of a copying machine is shown in which the upper machine frame 2 is opened by rotating around a fulcrum as shown in FIG. In some cases, it is also possible to configure the upper machine frame to move upward as it is. - The photoreceptor belt, which is the charged object 4, is attached to the upper machine frame 2 by the roller 5.
It is transported and supported by. The charged member 4 is not limited to a photoreceptor heald, but may also be a photoreceptor drum.

A transfer corona discharger is arranged as a charger 6 below the object 4 to be charged.

The copying machine shown in FIG. 1 includes a charger 7, an exposure optical system 8, a developing device 9, which will not be described in detail since it is outside the scope of the present invention.
, paper feed device 10. Cleaning device 11, fixing device 12
etc. are provided in a known manner.

Since the charger 6 is provided in the lower machine frame 1 and the charged object 4 is provided in the upper machine frame 2, when the upper machine frame 2 is opened upward, there is a space above the charger 6.

As shown in FIGS. 2 and 3, the charger 6 has a charger casing 13, and a first end block 14 and a second end block 15 attached to both ends of the charger casing 13. The first end block 14 is connected to the second end block 15 at the left end of the charger casing 13 in the figure.
is mounted on the right end. A wire 16 is stretched within the charger casing 13 with both ends fixed to the first end block 14 and the second end block 15.

A guide protrusion 17 is formed on the side of the charger casing 13 where the transfer paper enters.

The first end block 14 is provided with two legs 18 that extend downward during installation. A spring abutting portion 2o is formed as a convex portion or a concave portion on the lower surface 19 of the first end block 14, that is, the surface facing the lower machine frame 1.

The second end block 15 is provided with two other legs 22 in addition to the two legs 21 similar to those of the first end block 14, and like the first end block 14, the lower surface 23 has a convex or concave portion. A spring abutting portion 24 is formed as a spring abutting portion 24.

As shown in FIG. 4, in the portion of the lower machine frame 1 to which the charger 6 is attached, guide portions are formed at portions facing the end blocks 14 and 15 of the charger 6, respectively.

A first guide portion 25 facing the first end block 14 is formed with a guide wall 26 that fits between the two legs 18 and serves as a guide for the legs 18, and a spring receiving recess 27 that receives the spring end. be done. When the charger 6 is attached, a spring 28 is attached between the first guide portion 25 and the first end block 14. One end of the spring 28 is inserted into the spring receiving recess 27, and the other end is inserted into the spring resting part 20 of the first end block 14.
comes into contact with.

Second guy 1' portion 29 facing second end block 15
Two end walls 30 and 31 are formed at the end wall 30 and 31 for restraining the movement of the second end block 15 in the longitudinal direction of the charger during installation. The end walls 30, 31 also serve as a guide when the second end block 15 is installed. Furthermore, guide walls 32 and 33 prevent the second end block 15 from shifting in a direction crossing the longitudinal direction of the charger and serve as a guide for the second end block 15.
is formed. The guide wall 32 is fitted between the two legs 21, and the guide wall 33 is fitted between the other legs 22 for guidance.

A platform 35 having a spring receiving recess 34 is formed between the guide walls 32 and 33. When the charger 6 is attached, a spring 36 is attached between the second guide portion 29 and the second end block 15. One end of the spring 36 is inserted into the spring receiving recess 34, and the other end abuts against the spring abutment 24 of the second end block 15.

The charger 6 is sometimes assembled on the leg 1 of the end block 14.15.
8, 21, and 22 of the guide portion 25.29 of the lower machine frame 1, and the guide wall 26. 32, 33 and the end walls 30, 31, the charger 6
The relative positioning of the lower machine frame 1 with respect to the lower machine frame 1 can be easily and accurately performed.

When the charger 6 is attached to the lower machine frame 1 and the upper machine frame 2 is closed, the object to be charged 4 attached to the upper machine frame 2 is moved to the support member 38 that supports the object to be charged 4, as shown in FIG. The surfaces of the end blocks 14 and 15 indirectly contact the charger 6 by contacting the reference abutment portions 37 provided on the end blocks 14 and 15, respectively. Therefore, if the distance accuracy between the reference abutment part 37 and the wire 16 is maintained, and the distance accuracy between the charged object and the surface of the support member is maintained, the distance between the charged object and the wire of the charger is maintained. The distance between can also be maintained with high precision.

Since the charger 6 is pressed against the support member of the charged object by the springs 28 and 36, the distance between the charger and the charged object can be determined accurately without fixing the charger to the lower machine frame with screws or the like. can get. Since it can be assembled in a floating state and high precision can be obtained, the installation work is very easy.

When the object to be charged is a photoreceptor drum, a highly accurate interval can be similarly achieved by bringing a flange or the like provided on the photoreceptor drum as a reference member into contact with the reference abutting portion of the charger.

Since the guide part is integrally formed with the lower machine frame according to the present invention, the number of parts can be reduced, and the positional accuracy of the guide part can be improved. In addition, assembly is possible with the simple operation of dropping the charger into the lower machine frame, making work easier. Furthermore, by pressing the charger against the lower machine frame directly or indirectly by the object to be charged, it has become possible to easily and accurately set the distance between the object to be charged and the charger.

[Brief explanation of drawings]

Fig. 1 is a schematic explanatory diagram of a copying machine using the present invention, Fig. 2 is a perspective view from above of the charger according to the present invention, Fig. 3 is a perspective view from below of the charger, and Fig. 4 is a bottom perspective view of the charger. FIG. 5 is an exploded perspective view to clarify the relationship between the machine frame and the charger, and FIG. 5 is a sectional view showing the state in which the charger is assembled and the object to be charged is placed at a predetermined position. 1... Lower machine frame 2... Upper machine frame 4... Charged body 6... Charger 14... First end block 15... Second end block 16 wire 18... Leg 21 ...Leg 22...Leg 25...First guide part 26...Guide wall 28...
・Spring 29...Second guide part 30.31...End wall 32, 33...Guide wall 36...Spring 37...
・Reference abutting portion 38...Supporting member Figure 5 Date: γ-9, 1980 Kazuo Wakasugi, Commissioner of the Japan Patent Office 1 Indication of the case 1981 Patent Application No. 062190 Record 2 Name of the invention Charger support in a copying machine Device 3 Relationship with the case of the person making the amendment Patent Applicant) 8 References 2 [J≦ζ Name (Name) (674) Ricoh Co., Ltd. 4 Agent j] 6. Detailed explanation column, drawings. 7. Contents of the amendment J) Description “Legs” 8 on page 4, lines 16 to 19 of the specification of the present application
is provided. ·············It is formed. "The legs 18 are provided, and the mounting position with respect to the charging casing 3 is determined by a positioning convex portion 20 formed on the lower surface 19 of the first block 14, that is, the surface facing the lower machine frame 1. 2) In the same No. 3, the description in the 3rd and 4th lines on the negative side ``On the bottom surface 23...''
... is formed. " is corrected to "The mounting position relative to the charging casing j3 is determined by the positioning convex portion 24 formed on the lower surface 23." 3) Description on page 5, line 16 of the same page 1-] 4 spring contact part 20
"to" is corrected to "to the charged casing 13 on the bottom surface of 14." 4) On page 6, line 14 of the same page, the statement "to the spring contact part 24 of 15" is corrected to "to the charging case nog 13 on the bottom surface of 15". 5) Negative side of No. 7] The statement “charger” in line 6 will be corrected to “charger”. 6) Replace Figures 2, 3, and 5 with the attached drawings.

Claims (1)

[Claims] In a charger support device for a copying machine in which a charger is supported in a lower machine frame, a charged object is supported in an upper machine frame, and the charged object is placed above the charger, both ends of the charger in the lower machine frame are supported. It has a guide part integrally molded at a position facing the block, and a spring installed between the guide part and the end block, a guide wall is formed in the guide part, and a guide wall is formed in the end block. 1. A charger support device for a copying machine, characterized in that a leg is provided to be inserted and guided, and a reference abutting portion is formed on the end block, with which a charged object or a charged object support member abuts.