JPH05289471A - Electrostatic charge device - Google Patents

Abstract

PURPOSE:To easily maintain a corona discharge body by providing a supporting member interposing the corona discharge body and forming a guide part guiding the supporting member freely attachably and detachably to a case main body. CONSTITUTION:The corona discharge body 10 giving electrostatic charge to a surface to be electrostatically charged is interposed by the supporting member 12 and arranged along the longitudinal direction of the case main body 13. A grid member 11 is arranged between the surface to be electrostatically charged and the discharge body 10. Both ends of the longitudinal direction of the main body 13 are opened. On both sides on the inside thereof, the guide part 14 guiding the supporting member 12 in the longitudinal direction freely slidably, is arranged. A projecting body 15 is projectingly provided at the guide part 14 along the longitudinal direction and a groove 16 engaged with the projecting body 15 is formed on both sides of the supporting member 12. When the discharge body 10 is cleaned or exchanged, it can be easily removed from the case 13 by pulling out the supporting member 12 from the case main body 13 by holding a handle 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scorotron type charging device for charging the surface of a photoconductor of a copying machine or the like.

[0002]

2. Description of the Related Art In a conventional scorotron charging device, as shown in FIG. 4, a saw-tooth corona discharge body 1 facing a surface to be charged such as a photoconductor is sandwiched by a supporting member 2 and the supporting member 2 is attached to a case body 3. It is fixed.

A grid 4 having openings in a grid pattern is arranged between the discharge body 1 and the surface to be charged. The grid 4 is fixed to the upper surface of the case body 3, and both ends in the longitudinal direction are attached to the grid support member 5. The grid support members 5 are fixed to the longitudinal ends of the case body 3, respectively.

[0004]

In the conventional charging device,
Since the discharge body 1 is fixed in the case body 3, the grinds and the like must be removed when cleaning or replacing the tooth tips, which is very troublesome. Moreover,
Since the entire case body must be replaced, the cost of parts will increase.

In view of the above, an object of the present invention is to provide a charging device capable of easily maintaining a discharge body.

[0006]

As shown in FIGS. 1 and 2, in a means for solving the problem according to the present invention, a case body 13 is internally provided with a corona discharger 10 for giving an electrostatic charge to a surface to be charged, and the surface to be charged and the surface to be discharged. The grid member 11 is arranged between the body 10 and the discharge body 10, and the discharge body 10 is sandwiched between the support members 12 and the case main body 13.
A guide portion 14 for detachably guiding the support member 12 is formed.

The guide portion 14 is formed along the longitudinal direction of the case body 13, and a support member loading / unloading handle 17 is formed on one side of the support member 12 in the longitudinal direction so as to project outside the case body 13. Has been done.

[0008]

In the above means for solving the problems, when the discharge body 10 is cleaned or replaced, the support member 12 is pulled out from the case body 13 by holding the handle 17 so that the discharge body 10 can be easily removed from the case body 13. Can be removed.

When the discharge body 10 is mounted, the supporting member 1
When 2 is pushed in along the guide portion 14, it is attached to the case body 13.

[0010]

1 is a perspective view of a charging device showing an embodiment of the present invention, FIG. 2 is a sectional view of the same, and FIG. 3 is a perspective view of the charging device in which a discharge body is slid with respect to a case body. Is.

As shown in FIG. 1, the charging device of this embodiment comprises a corona discharger 10 for giving an electrostatic charge to a surface to be charged such as a photoconductor,
1 is a scorotron charging device having a grid member 11 arranged between a surface to be charged and a corona discharge body 10. It is used as a charging charger, a transfer charger, a charge eliminating charger, etc. in a copying machine or the like.

The corona discharge body 10 is formed in a sawtooth shape,
It is sandwiched by the support members 12 and arranged along the longitudinal direction of the case body 13.

The support member 12 has a rectangular cross section,
The corona discharge body 10 is arranged in the center of the case body 13
It is slidable on.

The case body 13 has a U-shaped cross section and is formed so that both ends in the longitudinal direction are open, and guide portions 14 for guiding the support member 12 slidably in the longitudinal direction are formed on both inner sides.
Are arranged.

A convex body 15 is provided on the guide portion 14 so as to extend along the longitudinal direction, and grooves 16 that engage with the convex body 15 are formed on both sides of the support member 12.

A handle 17 for sliding the support member 12 is formed at one end of the support member 12. The handle 17 is larger than the width of the support member 12 so as not to enter the inside of the case body 13.

As the grid member 11, a thin metal plate having a mesh structure is used to eliminate uneven charging and make the surface potential of the surface to be charged uniform. Then, the grid supporting member 1 is placed on the upper surface of the case body 13 and has both ends.
It is fixed by being engaged with the protrusion 19 formed on 8.

The grid support members 18 are arranged on both sides of the support member 12 and are fixed to the case body 13. In addition, the convex body 20 that engages with the groove 16 of the support member 12
Is formed continuously with the convex body 15 of the guide portion 14.

The corona discharge body 10 and the grid member 11 are respectively connected to a high voltage unit (not shown) so that a high DC voltage is applied to the corona discharge body 10 and a low DC voltage is applied to the grid member 11.

In the above structure, the handle 17 is used when cleaning or replacing the corona discharge body 10.
By holding the support member 12 out of the case body 13 by holding the corona discharger 10, the corona discharger 10 can be easily moved.
Can be removed from.

When the corona discharger 10 is mounted, the protrusions 15 and 20 are engaged with the groove 16 of the support member 12 until the handle 17 contacts the grid support member 19.
By pushing 2 in, it can be attached to the case body 13.

At this time, since the support member 12 is guided by the guide portion 14, the positioning of the corona discharge body 10 becomes reliable, and the positioning adjustment at the time of mounting is unnecessary.

By thus making the corona discharge body 10 easily attachable to and detachable from the case body 13, maintenance such as cleaning and replacement of the corona discharge body 10 can be easily performed. Moreover, since only the corona discharge body 10 needs to be replaced, the running cost can be reduced.

The present invention is not limited to the above embodiment, and it goes without saying that many modifications and changes can be made to the above embodiment within the scope of the present invention.

The engagement between the guide portion 14 and the support member 12 is not limited to that of this embodiment, and the irregularities may be reversed.

[0026]

As is apparent from the above description, according to the present invention, the discharge body is sandwiched between the support members and the case body is
Since the guide portion that detachably guides the support member in the longitudinal direction is formed, the discharge body can be attached to and detached from the case body, and maintenance such as cleaning and replacement of the discharge body can be easily performed. Moreover, since only the discharge body needs to be replaced, the running cost can be reduced.

Further, by forming the handle for inserting and removing the support member on one side in the longitudinal direction of the support member so as to project to the outside of the case body, the support member can be easily attached and detached, and the handle can be inserted and removed along the guide portion. Therefore, when the positioning accuracy of the discharge body is improved, an excellent effect is obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a charging device showing an embodiment of the present invention.

FIG. 2 is a sectional view of the same.

FIG. 3 is a perspective view of the charging device in which the corona discharger is slid with respect to the case body.

FIG. 4 is a perspective view of a conventional charging device.

[Explanation of symbols]

 10 Corona Discharge Body 11 Grid Member 12 Supporting Member 13 Case Body 14 Guide Part 17 Handle

Claims (2)

[Claims] 1. A charging device in which a corona discharger for imparting an electrostatic charge to a surface to be charged is provided inside a case body, and a grid member is arranged between the surface to be charged and the discharger, for supporting the discharger in a sandwiched manner. A charging device, wherein a member is provided, and a guide portion for detachably guiding the support member is formed on the case body. 2. The guide part according to claim 1 is formed along the longitudinal direction of the case body, and the support member loading / unloading handle is formed on one side in the longitudinal direction of the support member so as to project outside the case body. Charging device characterized in that