JP2620218B2 - Conveyor belt for copier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an endless shape for setting originals automatically fed one by one onto a platen glass surface in close contact with the platen glass surface. And a conveyor belt for a copying machine.

[Conventional technology]

In recent years, various types of copiers with various functions have been proposed and developed. For example, a copier with an automatic document feeder suitable for high-speed copying has been proposed and developed. And this automatic document feeder (hereinafter referred to as
ADF device) is provided on the upper side of the copier body and sent out one sheet at a time from the storage section where many documents are stacked to the platen glass side by transport means, and then a pair is provided near the platen glass An endless transport belt stretched between rollers is used to closely set the original on the platen glass surface, and the original read and written by an exposure lamp is They are sequentially discharged outside the machine.

By the way, in such a copying machine with an ADF device, there is a possibility that the conveyance belt is contaminated by the adhesion of toner, carbon, or the like from the manuscript paper, causing various troubles such as deterioration of image quality.

Therefore, in such a case, measures such as blowing off contaminants such as toner adhered to the surface with a cleaner such as alcohol are taken.

Further, in such a transport belt, the friction coefficient against paper is set to about 0.8 in order to transport the document stably, and in order to reduce the load current of the drive motor when contacting with the platen glass, The coefficient of friction is set to 1.2 or less.

[Problem to be solved]

However, in order to reduce the coefficient of friction against glass, such a conveyor belt is generally subjected to fine lattice-like graining, which, in contrast, tends to cause graining when using a cleaner to remove dirt. It was a drawback that the dirt that had entered could not be removed. It should be noted that if the belt has a smooth surface without grooves or grooves, it is obvious that it is advantageous to wipe off dirt, but sometimes the belt and the platen glass adhere to each other when the belt is driven immediately after cleaning with a cleaner, Excessive load current may damage the motor or prevent the belt from rotating.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a conveying belt for a copying machine in which the conveying belt can be easily cleaned and the friction coefficient against glass and the load current are reduced.

[Means for solving the problem]

In order to achieve the above-mentioned object, the present invention relates to an endless copying machine transport belt formed by molding a thermoplastic elastomer and setting documents one by one on a platen glass surface in close contact with each other. A plurality of long grooves are continuously formed over the entire width in the width direction of the belt.

[Action]

When the conveyor belt of the present invention is driven, the friction coefficient against glass can be reduced due to the presence of the long groove, and the load current can be reduced. Further, when trying to remove dirt using a cleaner, it is easy to remove dirt along the long grooves.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

In the overall simplified cross-sectional view shown in FIG.
In a casing 2 serving as a platen cover, a conveyor belt 5 is stretched between a pair of rollers 4 provided above and opposite to the platen glass 3. A plurality of long grooves 6 are formed on the surface of the conveyor belt 5 along the width direction over the entire circumference in the traveling direction. A large number of original sheets 7 are stacked in a storage section 8 adjacent to the ADF device 1, and the original sheets 7 are fed toward the platen glass 3 by feed rollers 9, 9. In FIG. 1, reference numeral 10 denotes a copying machine main body. In the embodiment shown in FIG.
A plurality of long grooves 6 are formed endlessly along the width direction of the belt 5 (see FIG. 2).

In particular, the transport belt 5 of this embodiment has long grooves 6 formed over the entire width of the belt 5 in the width direction.
Was formed over the entire circumference of the belt 5 with an interval of 10 mm.

In the embodiment shown in FIG.
Is formed.

In the embodiment shown in FIG. 4, the inner circumferential length of the belt 5 is 730 mm and the width is 4 mm.
Long grooves 6 are continuously formed over the entire width in the direction of the belt 5 for a belt 5 having a thickness of 50 mm and a thickness of 0.6 to 0.7 mm, and a plurality of long grooves are formed at a pitch of 5 mm. 13 for interval
0 mm.

In any of the above embodiments, the depth t of the groove 6 is preferably not more than half the thickness T of the belt 5 (see FIG. 5).

In each of the above-described embodiments, the long groove 6 is continuous from one end to the other end in the width direction or the long groove 6 formed endlessly. However, as shown in FIG. 6, the long groove 6 has an end portion. No problem. The end of the long groove 6 having such an end is formed to have a gentle slope from the surface of the belt 5 to the groove bottom in consideration of easiness of wiping (see FIG. 7). Further, the long grooves 6, 6 do not need to be parallel to each other, and may be arranged so as to cross each other.

Next, as shown below, a comparison experiment was performed on the peak load current values before and after cleaning using the belts A to E.

A: Made of polyurethane, smooth surface B: Made of polyurethane, the embodiment shown in FIG. 2, and having one long groove of 10 mm C: Made of polyurethane, the embodiment shown in FIG. , Having a long groove of 2/10 mm D: made of polyurethane, having a number of grooves of 2/10 mm, and having a smooth portion having a width of 130 mm in the belt running direction in the embodiment shown in FIG. Polyurethane coated, with a lattice-shaped grain on the surface (25 grains / 10 mm when converted to the number of grooves) A-D have no polyester woven fabric reinforcement,
All belts A to E have an inner circumference of 730 mm, a width of 450 mm and a thickness of 0.
6 ~ 0.7mm, long groove of A ~ D is 120μm deep, 500μm wide
m and E were 35 μm in depth and 300 μm in width. As cleaners, 1,1,2,2 tetrachloro-1,2 difluoroethane and
A mixed solvent of 1,1,2 trichloro-1,2,2 trifluoroethane was used. A4 size copy paper was used as the manuscript. The results of this experiment were as shown in Table 1 below.

As can be seen from this result, 2 belts / 1
By providing the long groove 6 of 0mm (5mm pitch), 130mm
, The load current value is the same as that of the lattice-shaped embossed belt E currently used in the market. In this example, the grooveless belt did not stop after cleaning, but the load current value suggests that an overload may occur in some cases. Regarding the dirt wiping, the dirt could be easily wiped by cleaning along the long groove from A to D.
Could not be completely wiped. If the number of the long grooves 6 increases, the load current value immediately after the cleaning becomes the same level as before the cleaning.
The degree is preferred. Further, it is preferable that the shape of the long groove 6 has an arc-shaped surface without an acute portion in consideration of the easiness of wiping off dirt. Further, the depth of the long groove 6 is 50-200.
μm, and the width is preferably about 500 to 1000 μm. And
The area of the entire long groove 6 with respect to the surface area of the conveyor belt 5 is 5
It is desirable to be within the range of ~ 20%. If the area of the long groove 6 exceeds 20%, it is difficult to wipe off dirt. If the area of the long groove 6 is less than 5%, the effect of forming the long groove 6 is reduced. Occurs.

Further, an experiment of ease of extraction was performed by the following method. In other words, attach the toner to the cut cotton and rub it against the belt,
Next, measure the lightness before applying the toner and the lightness after wiping with a method of wiping the toner by including the cleaner in the cut cotton,
It was evaluated how much the toner can be wiped off. The results are shown in Table 2 below. A to E in Table 2 are the same as those used in the previous experiment.

As the transport belt 5 itself, a seamless tube is formed by kneading a polyester-based urethane as a thermoplastic elastomer with a contamination inhibitor and a bleed speed regulator and extruding the same, and the seamless tube is formed by cutting into a suitable length. It can be made of the endless material. When the antifouling agent oozes out on the surface side of the transport belt 5 and is formed into a uniform thin film, it is possible to prevent the contaminant from adhering to the surface of the transport belt 5 as much as possible.

〔effect〕

As described above, according to the present invention, since a plurality of long grooves are continuously formed on the belt surface over the entire width in the width direction of the belt, it is easy to remove dirt attached to the surface of the conveyor belt, and the coefficient of friction against glass and the load are reduced. A reduction in current can be realized. In addition, since the dirt attached to the surface of the conveyor belt can be sufficiently removed, the dirt can be repeatedly wiped off, and a longer service life can be achieved as compared with a conveyed belt with the same material. Further, even in the invention according to claim 2, the long groove formed along the width direction does not cover the entire width, since a gentle slope is formed from the belt surface to the groove bottom. It is easy to wipe off dirt.

[Brief description of the drawings]

FIG. 1 is a simplified sectional view showing a preferred embodiment of the present invention, FIG. 2 is a schematic perspective view of a transport belt used in FIG. 1, and FIGS. 3 and 4 show long grooves formed in the transport belt. FIG. 5 is a simplified perspective view showing various variations, FIG. 5 is a sectional view of a long groove portion, FIG. 6 is a simplified plan view of a conveyor belt showing another embodiment, and FIG. 7 is a sectional view taken along the line VII-VII of FIG. . 5: Conveyor belt, 6: Long groove.

Claims (3)

(57) [Claims] An endless copying machine transport belt formed by molding a thermoplastic elastomer and setting originals (7) one by one on a platen glass (3) surface in a state of being adhered to the belt (5). A) a conveyor belt for a copying machine, wherein a plurality of long grooves (6) are continuously formed on the surface over the entire width in the width direction of the belt (5). 2. An endless copying machine conveying belt formed by molding a thermoplastic elastomer and setting originals (7) one by one on a surface of a platen glass (3). ) A plurality of long grooves (6) are formed on the surface in the width direction of the belt (5), and each end of the long grooves (6) is formed on a gentle slope from the groove bottom to the surface of the belt (5). Conveyor belt for copier characterized by the following. 3. A transfer belt for an endless copying machine formed by molding a thermoplastic elastomer and setting originals (7) one by one on a platen glass (3) in a closely contacting state. 6) The belt (5) is 20 ゜ -90 with respect to the running direction
The long groove (6) is formed continuously over the entire width of the belt (5), or each end of the long groove (6) extends from the groove bottom to the surface of the belt (5). A conveying belt for a copying machine, wherein the conveying belt is formed on a gentle slope.