JP2008052226A - Double-sided tape - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a double-sided tape that is free from causing malfunction such as toner scattering or scratches to a photoreceptor drum due to peeling, by arranging a structure capable of effectively conducting air-vent, when used as an entrance seal for preventing the scattering of toner from a developing device. <P>SOLUTION: In an electrophotographic image forming part wherein a toner supply port of the developing device is arranged oppositely to a rotationally moved photoreceptor surface, the double-sided tape 1 fixes the entrance seal arranged at an upper stream side of the toner supply port in the developing device and a bracket for supporting the entrance seal. The double-sided tape 1 includes circular holes 6 each having a diameter smaller than the width of the double-sided tape 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an image forming apparatus using a two-component developer of an electronic copying apparatus and a double-sided tape used for an image forming apparatus using a one-component toner.

  In an image forming system unit of an electronic copying apparatus using a one-component or two-component developer, an inlet seal is disposed as a member for preventing toner scattering from a toner supply port of a developing device facing a photoreceptor. Double-sided tape is used as means for attaching the inlet seal and the bracket that supports the inlet seal.

Various configurations are known for double-sided tapes (see, for example, Patent Documents 1 to 5). Patent Documents 1 to 3 simply disclose a double-sided tape or the like. Patent Document 4 discloses a technique in which an adhesive tape is composed of an adhesive sheet and a release sheet, and fine holes that penetrate the adhesive sheet and the release sheet are perforated.
Further, Patent Document 5 includes a developing device having a seal member for preventing toner scattering that can come into contact with the surface of the latent image carrier, and is in contact with the surface of the latent image carrier and the inside of each device and the latent image carrier. A technique of providing a seal member so as to close the space between the body surface is disclosed.

FIG. 5 is a schematic view showing a conventional double-sided tape and an object to be attached. As shown in FIG. 5, when the double-sided tape 1 is attached to the object to be attached (bracket) 2, air enters between the double-sided tape 1 and the object to be attached (bracket) 2 and bubbles 3 enter. There is.
FIG. 6 is a schematic view showing an adhesive sheet 4 and a pasting object of a conventional double-sided tape. As shown in FIG. 6, when the conventional double-sided tape 1 is attached to an object 2 ′ having a concave curved surface, depending on how the conventional double-sided tape 1 is applied, the object 2 ′ having a concave curved surface is used. It becomes the state 13 in which the central part is peeled off and floats without adapting to the curved surface.
JP 2004-123160 A JP 05-208462 A Japanese Patent Laid-Open No. 10-119943 JP 2004-149621 A JP 2000-181221 A

However, when air enters, if the air that has entered remains as a bubble without being discharged, the double-sided tape peels off due to a lack of the bonding area.
Further, when such a double-sided tape is used as an inlet seal that contacts the photosensitive drum of the developing device of the electronic copying apparatus and prevents the toner from scattering from the developing device, the toner scattering due to the peeling, the photosensitive drum May cause problems such as scratches.

  Accordingly, an object of the present invention is to provide a configuration that can more effectively vent the air when used as an inlet seal for preventing the scattering of toner from the inside of the developing device in consideration of the above-described situation. An object of the present invention is to provide a double-sided tape that does not cause problems such as toner scattering and scratches on the photosensitive drum.

In order to solve the above problems, the invention according to claim 1 is an electrophotographic image forming unit in which a toner supply port of a developing device is disposed opposite to a surface of a rotating photosensitive member, and a toner supply port of the developing device. A double-sided tape for fixing an inlet seal disposed on the upstream side and a bracket for supporting the inlet seal, wherein the double-sided tape is provided with a circular hole having a diameter smaller than the width of the double-sided tape. Features double-sided tape.
The invention according to claim 2 is the double-sided tape according to claim 1, wherein the double-sided tape has the circular holes arranged on a straight line passing through the center in the short direction of the double-sided tape.
According to a third aspect of the present invention, in the electrophotographic image forming unit in which the toner supply port of the developing device is disposed opposite to the rotating photoreceptor surface, the toner supply port is disposed upstream of the toner supply port of the developing device. A double-sided tape for fixing an inlet seal and a bracket that supports the inlet seal, wherein the double-sided tape is provided with a plurality of small-diameter holes having a diameter of 0.3 mm or more.

According to a fourth aspect of the present invention, in the electrophotographic image forming portion in which the toner supply port of the developing device is disposed opposite to the surface of the rotating photoreceptor, the toner supply port is disposed upstream of the toner supply port of the developing device. A double-sided tape that fixes an inlet seal and a bracket that supports the inlet seal, the double-sided tape having one or more perforated holes that pass through the double-sided tape along the longitudinal direction of the double-sided tape. Features a tape.
The invention according to claim 5 is the double-sided tape according to claim 4, wherein the sewing machine-like hole is provided in a short direction of the double-sided tape.

  According to the present invention, the tape member and the release paper are provided with through holes, and the air vent hole is a hole smaller than the width of the double-sided tape and arranged in the center thereof, whereby the double-sided tape and the object to be attached Air can be removed between objects, and double-sided tape can be attached without bubbles.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As described above, the double-sided tape according to the present invention is, for example, in the electrophotographic image forming unit in which the toner supply port of the developing device is disposed opposite to the surface of the rotating photosensitive member, and upstream of the toner supply port of the developing device. It is used to affix an inlet seal and a bracket that supports the inlet seal. The adhesive is provided on both sides of the tape member, and the release paper is in close contact with the adhesive.
As described above, the conventional double-sided tape having such a structure has a structure in which air enters between the double-sided tape and the object to be attached when the object is applied to the object to be attached. Remained as bubbles without being discharged.

FIG. 1 is a schematic partial sectional view showing the structure of a double-sided tape according to the present invention. The double-sided tape 1 in FIG. 1 is composed of an adhesive sheet 4 provided with an adhesive not shown on both sides, and a release paper 5 that is in close contact with the adhesive on both sides of the adhesive sheet 4. The adhesive sheet 4 and the release paper 5 are provided with a circular hole 6 penetrating them.
For example, the circular hole 6 through which the double-sided tape 1 has passed is a circle whose diameter is smaller than the width of the double-sided tape 1 and is arranged at the center of the double-sided tape 1 (on the straight line connecting the center in the short direction of the double-sided tape). Yes. Thus, the air vent circular hole 6 provided in the double-sided tape 1 (adhesive sheet 4) is a hole whose diameter is smaller than the width of the double-sided tape 1, and the center of the double-sided tape 1 (the center in the short direction of the double-sided tape). The air can be vented more effectively.

FIG. 2 is a schematic view showing a state in which the adhesive sheet 4 is attached to a bracket that supports the inlet seal. In FIG. 2, when the adhesive sheet 4 is attached to the bracket 7 that supports the inlet seal (not shown), the air that is to remain between the adhesive sheet 4 and the bracket 7 causes the adhesive sheet 4 from the top. By pressing, it passes through the circular hole 6 provided in the double-sided tape 1.
For this reason, it becomes possible to affix the adhesive sheet 4 to the bracket 7 without creating bubbles between the adhesive sheet 4 and the bracket 7.
Further, by providing a plurality of 0.3 mm small-diameter holes 8 in the double-sided tape 1 (adhesive sheet 4), the adhesive sheet 4 and the bracket 7 for supporting the inlet seal can be used even with a narrow double-sided tape that may have a short pasting area. Attaching can be performed while satisfying the affixing area without introducing bubbles between them. Further, even with the wide double-sided tape 1, more effective air venting can be performed while maintaining the pasting area.

FIG. 3 is a partial schematic view showing the adhesive sheet 4 provided with a perforated hole penetrating in accordance with the shape of the bracket 7 supporting the inlet seal having a concave curved surface. In FIG. 3, perforated holes 14 are provided in the adhesive sheet 4 at equal intervals and penetrating in accordance with the shape of the bracket 7 that supports an inlet seal (not shown) having a concave curved surface.
According to such a configuration, the adhesive sheet 4 can be adhered to the curved surface of the bracket 7 because the adhesive sheet 4 is refracted. In addition, air passes through the perforated holes 14 provided in the adhesive sheet 4 at equal intervals. As a result, the double-sided tape 1 can be attached without introducing bubbles into the center of the concave curved surface.
As described above, since one or a plurality of perforated holes 14 are present in a straight line at equal intervals, when attached to the concave curved surface of the bracket 7, it becomes easy to become familiar with the bracket 7 and hardly peel off. In addition, air can be ventilated at locations where bubbles are likely to enter near the apex of the concave curved surface.

FIG. 4 is a schematic view showing perforated holes 14 that are provided at equal intervals in the short direction of the double-sided tape. In FIG. 4, the adhesive sheet 4 has perforated holes 15 provided at equal intervals in the short direction. The perforated hole 15 passes through the adhesive sheet 4 (double-sided tape 1).
Even if both longitudinal ends of the bracket 7 supporting the inlet seal (not shown) have non-planar portions by providing through perforated holes 15 provided at equal intervals in the lateral direction When the sheet 4 is refracted by the perforated perforated holes 15 provided at equal intervals, it becomes easy to become familiar and difficult to peel off, and the adhesive sheet 4 to the bracket 7 does not enter the vicinity of the refracted shape 16 without introducing bubbles. Can be pasted.
In this way, by providing one or a plurality of rows of perforated holes 15 in the short direction in the adhesive sheet 4, the perforated holes 15 provided at equal intervals can be used even when there are non-planar portions in the longitudinal direction. The double-sided tape 1 is refracted so that it is easy to become familiar and difficult to peel off.

The schematic fragmentary sectional view which shows the structure of the double-sided tape by this invention. Schematic which shows the state which has affixed the double-sided tape on the bracket which supports an entrance seal. The partial schematic diagram which shows the double-sided tape which provided the perforated hole penetrated according to the shape of the bracket which supports the inlet_port | entrance seal | sticker which has a concave curved surface. Schematic which shows the perforated hole penetrated provided in the transversal direction of the double-sided tape at equal intervals. Schematic which shows the conventional double-sided tape and a bracket. Schematic which shows the conventional double-sided tape and a bracket.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Double-stick tape, 2 and 2 'sticking object 4 Adhesive sheet 5 Release paper 6 Circular hole 7 Bracket (sticking object) 8 Small-diameter hole 12 Bracket 14 Longitudinal perforation hole, 15 Perforated holes in the short direction,

Claims (5)

In the electrophotographic image forming unit in which the toner supply port of the developing device is arranged to face the surface of the rotating photosensitive member,
A double-sided tape for fixing an inlet seal disposed upstream of a toner supply port of the developing device and a bracket supporting the inlet seal;
The double-sided tape is characterized in that a circular hole having a diameter smaller than the width of the double-sided tape is provided in the double-sided tape. The double-sided tape according to claim 1,
2. The double-sided tape, wherein the circular holes are arranged on a straight line passing through a center portion in a short direction of the double-sided tape. In the electrophotographic image forming unit in which the toner supply port of the developing device is arranged to face the surface of the rotating photosensitive member,
A double-sided tape for fixing an inlet seal disposed upstream of a toner supply port of the developing device and a bracket supporting the inlet seal;
A double-sided tape comprising a plurality of small-diameter holes having a diameter of 0.3 mm or more provided in the double-sided tape. In the electrophotographic image forming unit in which the toner supply port of the developing device is arranged to face the surface of the rotating photosensitive member,
A double-sided tape for fixing an inlet seal disposed upstream of a toner supply port of the developing device and a bracket supporting the inlet seal;
A double-sided tape comprising one or a plurality of linear perforated holes penetrating the double-sided tape along the longitudinal direction of the double-sided tape.   The double-sided tape according to claim 4, wherein the perforated holes are provided in a short direction of the double-sided tape.

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