JPH04283786A - Manufacture of cleaning blade - Google Patents

Abstract

PURPOSE:To easily unite a support plate with a plate type holder with good size accuracy. CONSTITUTION:The plate type holder 4 is arranged on the surface of a mold 12 so that a couple of fitting hole positioning projection parts 14 formed in array on one end side of the surface of the mold 12 are positioned in a couple of fitting holes 7 bored on one end side of the plate type holder 4 and a couple of positioning hole positioning projection parts 13 formed on the other end side in parallel to the projection parts 14 are positioned in a couple of large- diameter positioning holes 10 bored on the other end side. In this state, the support plate 6 is superposed on the plate type holder 4 so that the positioning hole positioning projection parts 13 are positioned in the positioning holes 9 on the other side of the support plate 6 which has a blade member 5 adhered on one end side; and the overlap parts of the both are adhered with an adhesive 16.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a cleaning blade for removing toner remaining on the outer peripheral surface of a photosensitive drum of an electrophotographic copying machine or the like.

0002

2. Description of the Related Art An electrophotographic copying machine is equipped with a photosensitive drum having a photoconductor surface layer, and the outer circumferential surface of the photosensitive drum is uniformly charged. An electrostatic latent image is formed on the outer peripheral surface by exposing to light, and toner is attached to this electrostatic latent image to form a toner image, which is then transferred to copy paper etc. to perform copying. be. After the above copying, as shown in FIG. 6, toner 2 remains on the outer circumferential surface of photosensitive drum 1, so it becomes necessary to remove this residual charged toner 2, and this removal is performed by cleaning blade 3. It's on. This cleaning blade 3 includes a metal plate-shaped holder 4 having a substantially L-shaped cross section.
A thick plate-shaped soft urethane resin blade member 5 is attached to the tip of the blade member 5.
is installed and configured. The cleaning blade 3 uses the elasticity of the blade member 5 to uniformly slide its tip onto the outer peripheral surface of the photosensitive drum 1 to remove the toner 2.

0003

However, since the cleaning blade 3 must be brought into sliding contact with the blade member 5 so as not to interfere with the rotation of the photosensitive drum 1, the length of the cleaning blade 3 must be adjusted so that the blade member 5 can be easily bent. It is necessary to set it for a long time. Further, since the blade member 5 buffers the impact force received from the photosensitive drum 1 and is always in a bent state, the blade member 5 has the disadvantage that the material tends to fatigue quickly and has poor durability. Therefore, as shown in FIG. 7, the blade member 5 is attached along the edge of one end of a support plate 6 made of stainless steel, and the other end of this support plate 6 is attached to the end of the plate-shaped holder 4. A cleaning blade 3a has been developed and put into practical use so that the impact force applied to the cleaning blade 3a is buffered by a support plate 6. This cleaning blade 3a has mounting holes 7 and 8 formed in the plate-like holder 4 and the support plate 6, respectively.
, 8 are aligned, and the support plate 6 is integrated with the plate-shaped holder 4 with high dimensional accuracy. However, as shown in FIG. 8, the cleaning blade 3 has the mounting holes 7 formed only in the plate-shaped holder 4, and has no mounting holes formed in the support plate 6.
In b, there is no guideline for accurately positioning the support plate 6 to the plate-shaped holder 4. For this reason, the support plate 6 is attached to the plate-shaped holder 4.
The problem is that it cannot be integrated with high dimensional accuracy.

The present invention was made in view of the above circumstances, and an object of the present invention is to provide a method for manufacturing a cleaning blade that allows a support plate to be easily integrated with a plate-shaped holder with good dimensional accuracy.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the cleaning blade manufacturing method of the present invention is such that a set of convex portions for positioning mounting holes are formed in a row on one end side of the mold surface. At the same time, a mold is prepared in which a set of protrusions for positioning the positioning holes are formed in a row on the other end side substantially along the above-mentioned set of protrusions, and the mold has a blade member on one end side and a blade member on the other end. A cleaning blade support plate having the above-mentioned set of positioning holes on one side, a set of mounting holes on one end side, and a set of positioning holes with a diameter larger than the positioning holes of the above-mentioned support plate on the other end side. A cleaning blade plate-like holder having a cleaning blade is prepared, and the protrusion for positioning the mounting hole is located in the mounting hole at one end of the plate-like holder, and the protrusion for positioning the positioning hole is located in the positioning hole at the other end. Place the plate-shaped holder on the mold surface of the mold so that the positioning hole is located within the positioning hole on the other end of the support plate. The support plate is stacked on the plate-shaped holder, and in this state, the overlapping portion of both is bonded with an adhesive member.

[0006]

[Function] The present inventors have proposed a method for integrating a plate-shaped holder and a support plate with high dimensional accuracy even in the case of a cleaning blade 3b as shown in FIG. 8 in which the mounting holes cannot be used for positioning. I have done a lot of research on this. In the process of this research,
As shown in FIG. 9, by drilling a set of positioning holes 9 and 10 in a row in the support plate 6 and the plate-shaped holder 4, the plate-shaped holder 4 and the support plate 6 can be integrated with high accuracy. I found out what I can do. This integration is carried out within the positioning hole 10 of the plate-shaped holder 4 and the mounting hole
The plate-shaped holder 4 is arranged on the mold surface of the mold 12 so that a set of positioning hole positioning convex parts 13 and mounting hole positioning convex parts 14 erected on the mold surface of the mold 12 are located therein. do. Next, insert the mold 1 into the positioning hole 9 of the support plate 6.
The support plate 6 is stacked on the plate-shaped holder 4 so that the positioning convex part 13 for positioning hole 2 is located, and the overlapping part of both is bonded with an adhesive 16, and then this is heat-formed and integrated. . However, the positioning convex portions 13,1
Since the positioning hole 10 and the mounting hole 7 of the plate-shaped holder 4 are fitted into the plate-shaped holder 4 without any gaps, both holes 10 and 7 contract due to the heat applied during molding and come into close contact with the positioning convex parts 13 and 14. I get used to it. For this reason, the molded (
It becomes difficult to remove the plate-shaped holder 4 of the cleaning blade 3b (integrated) from the mold 12, and if the plate-shaped holder 4 is forcibly removed, the support plate 6 is deformed and the flatness is impaired. Therefore, as a result of further research, the positioning hole 10 of the plate-shaped holder 4 was
As shown in FIG. 1, if the diameter is made larger than the positioning hole 9 of the support plate 6, the positioning hole 10 will not come into close contact with the positioning protrusion 13 even if heat shrinkage occurs, and the cleaning blade 3b after being molded from the mold 12 This invention was achieved by discovering that it can be easily removed.

That is, manufacturing a cleaning blade according to the present invention is carried out, for example, as follows. First, a set of protrusions for locating the mounting holes are formed in a row on one end of the mold surface, and a set of protrusions for locating the positioning holes are formed in a row on the other end. Prepare the mold. On the other hand, there is a cleaning blade support plate having a blade member on one end side and a set of positioning holes on the other end side, and a cleaning blade support plate having a set of mounting holes on one end side and positioning holes for the support plate on the other end side. A cleaning blade plate-shaped holder having a set of positioning holes with a diameter larger than that of the cleaning blade is prepared. Next, the plate-shaped holder is placed in the mold so that each of the convex portions is located in a mounting hole at one end of the plate-shaped holder and a positioning hole at the other end of the plate-shaped holder. Then, the support plate is stacked on the plate-shaped holder so that the positioning hole positioning convex portion is located in the positioning hole on the other end side of the support plate, and in this state, the overlapping part of both is bonded with adhesive. The cleaning blade is manufactured by integrating the plate-shaped holder and the support plate by bonding them together. Therefore, according to the manufacturing method of the present invention, the plate-like holder and the support plate can be easily integrated with good dimensional accuracy. In addition, even if the cleaning blade has a structure in which the mounting hole is not drilled in the support plate, the support plate can be integrated with the plate-shaped holder with high dimensional accuracy, and the molded product can be easily removed from the mold. . Furthermore, since the cleaning blade obtained as described above has excellent dimensional accuracy, the blade member can come into uniform sliding contact with the outer circumferential surface of the photosensitive drum.

Next, the present invention will be explained based on examples.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a cleaning blade obtained according to the present invention. This cleaning blade 15
A thick plate-shaped blade member 5 made of a soft urethane resin is bonded to one longitudinal end of a rectangular support plate 6 made of stainless steel with an adhesive 16 so as to align the longitudinal direction. Further, an end along the longitudinal direction of a metal plate-shaped holder 4 having a substantially L-shaped cross section is adhered to the other end side of the support plate 6 with an adhesive 16.

At both left and right ends of the other end of the support plate 6,
As shown in FIG. 2, positioning holes 9 are drilled. Furthermore, projecting portions 17 extending forward are formed at both left and right ends of the plate-shaped holder 4, and mounting holes 7 are formed in the left and right projecting portions 17, respectively. A positioning hole 10 having a diameter larger than the positioning hole 9 of the support plate 6 is bored at a predetermined distance rearward from the mounting hole 7. The positioning hole 9 of the support plate 6 and the positioning hole 10 of the plate-like holder 4 are aligned, and the other end of the support plate 6 is integrated with the end of the upper surface of the plate-like holder 4.

The cleaning blade 15 can be manufactured, for example, as follows. First, as shown in FIG. 3, two protrusions 13 for positioning a set of positioning holes are erected on one end side of the upper surface, and a set of mounting protrusions 13 is provided on the other end side in parallel with the above-mentioned set of protrusions 13. A mold 12 having two protrusions 14 for hole positioning is prepared. On the other hand, there is a support plate 6 with a blade member 5 bonded to one end and a set of positioning holes 9 drilled at the other end, and a support plate 6 with a set of mounting holes 7 drilled at one end and the support plate 6 at the other end. A plate-shaped holder 4 is prepared in which a set of positioning holes 10 having a diameter larger than the positioning holes 9 of the plate 6 are bored parallel to the mounting holes 7. Next, after applying adhesive 16 to one end side of the upper surface of the plate-shaped holder 4, each of the convex portions 13 and 14 is inserted into the positioning hole 1 of the plate-shaped holder 4.
The plate-shaped holder 4 is placed on the upper surface of the mold 12 with its upper surface facing upward, so that it is located inside the mold 12 and inside the mounting hole 7, respectively. Then, the support plate 6 is placed on the plate-like holder 4 so that the protrusion 13 whose tip protrudes through the positioning hole 10 of the plate-like holder 4 is located in the positioning hole 9 of the support plate 6. Place it on. As a result, the support plate 6 can be assembled to the plate-shaped holder 4 with high dimensional accuracy. Then, by heat-forming in this state, the cleaning blade 15 shown in FIG. 2 is manufactured.

In the cleaning blade 15 obtained as described above, the support plate 6 is attached to the plate-shaped holder 4 with high dimensional accuracy, and the distance from the tip of the blade member 5 to the center of the attachment hole 7 is generally specified. There is no deviation in the dimensions (indicated by A in FIG. 1). Therefore, the blade member 5 can be easily attached to an electrophotographic copying machine or the like so that the blade member 5 can come into uniform sliding contact with the outer peripheral surface of the photosensitive drum. Moreover, according to the above manufacturing method, even if the structure is such that the mounting holes cannot be used for positioning the plate-shaped holder 4 and the support plate 6, the two can be mounted accurately and easily. Further, a convex portion 13 for positioning the positioning hole of the mold 12
Since the hole diameter of the positioning hole 10 is set large so as to create a gap between the product and the positioning hole 10 of the plate-shaped holder 4, the product can be easily removed from the mold 12 after being heated and formed. The flatness of the support plate 6 is not impaired.

FIG. 4 shows another example of a cleaning blade obtained by the manufacturing method of the present invention. This cleaning blade 18 has mounting holes 8 and 7 formed in the support plate 6 and the plate-like holder 4 that can be used for positioning, as well as positioning holes 9 and 1 similar to the above embodiment.
0 is provided. As shown in FIG. 5, this cleaning blade 18 is connected to the positioning hole positioning convex part 13 and the mounting hole positioning convex part 14 of the mold 12, and the mounting holes 7, 8 and positioning holes of the plate-shaped holder 4 and the support plate 6. 10
, 9, the plate-shaped holder 4 and the support plate 6 are precisely integrated.

The cleaning blade described above is not only attached to an electrophotographic copying machine, but can also be applied to a laser beam printer or the like having a mechanism similar to that of an electrophotographic copying machine.

[0015]

[Effects of the Invention] As described above, according to the present invention, the convex portion for positioning the mounting hole is located within the mounting hole on one end side of the plate-shaped holder, and the convex portion for positioning the positioning hole is located in the mounting hole on one end side of the plate-shaped holder. A plate-like holder is arranged on the mold surface of the mold so that it is located in the large-diameter positioning hole on the other end side, and the convex part for positioning the positioning hole is located on the other end of the support plate having a blade member on one end side. The cleaning blade is manufactured by stacking the support plate on the plate-shaped holder so as to be located in the side positioning hole, and then bonding the overlapping portions of the two with an adhesive member. Therefore, the plate-shaped holder and the support plate can be easily integrated with high precision without requiring any skill or skill, so that product variations can be prevented and productivity can be improved. Further, since the plate-shaped holder and the support plate are integrated with high dimensional accuracy, a cleaning blade that slides uniformly on the outer peripheral surface of the photosensitive drum can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an example of a cleaning blade obtained by the manufacturing method of the present invention.

FIG. 2 is a perspective view of the cleaning blade.

FIG. 3 is a manufacturing explanatory diagram of the cleaning blade.

FIG. 4 is a longitudinal sectional view showing another example of a cleaning blade obtained by the manufacturing method of the present invention.

FIG. 5 is a manufacturing explanatory diagram of the cleaning blade.

FIG. 6 is an explanatory diagram showing how a conventional cleaning blade is used.

FIG. 7 is a perspective view of a conventional cleaning blade.

FIG. 8 is a perspective view showing another example of a conventional cleaning blade.

FIG. 9 is a perspective view of a cleaning blade that is the basis of this invention.

FIG. 10 is an explanatory diagram of manufacturing a cleaning blade, which is the basis of the present invention.

[Explanation of symbols]

4 Plate holder 5 Blade member 6 Support plate 7, 8 Mounting holes 9,10 Positioning hole 12 Molding mold 13　Protrusion for positioning hole positioning 14 Convex part for positioning mounting holes 15, 18 Cleaning blade

Claims (1)

[Claims] Claim 1: A set of protrusions for positioning the mounting holes are formed in a row on one end side of the mold surface, and a set of protrusions for positioning the mounting holes is formed on the other end side approximately along the set of protrusions. A mold in which a set of convex portions are formed in a row is prepared, and a cleaning blade support plate having a blade member on one end side and the above-mentioned set of positioning holes on the other end side; A cleaning blade plate-shaped holder having a pair of mounting holes and a pair of positioning holes having a diameter larger than the positioning holes of the support plate on the other end side is prepared, and one end side of the plate-shaped holder is attached. The plate-shaped holder is arranged on the mold surface of the mold so that the convex part for positioning the mounting hole is located in the hole, and the convex part for positioning the positioning hole is located in the positioning hole on the other end side. In this state, the support plate is stacked on the plate-shaped holder so that the convex portion for positioning the positioning hole is located in the positioning hole on the other end side of the support plate, and in this state, the overlapping portion of both is bonded with an adhesive member. A cleaning blade manufacturing method characterized by adhesive bonding.