JPH0575246U - Endless belt with meandering prevention guide - Google Patents

Abstract

(57) [Abstract] [Purpose] A guide can be easily attached to a recording medium base without stretching, and no distortion occurs due to the attached guide, and meandering can be prevented more easily. Provide endless belt. A meandering prevention guide formed of a hot-melt type binder resin in a protruding shape is provided along at least a belt surface on both side edges of the belt main body along a moving direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an endless belt such as an endless belt recording body used in a copying machine.

[0002]

[Prior Art]

 In the case of this type of endless belt, the endless belt is stretched around a driving roller and one or more driven rollers, and a force is applied to a required driven roller by a spring interposed between the endless belt and the machine frame. Is getting nervous. By the way, in such a case, the endless belt is meandered due to a slight inclination at the time of installation of each roller or local friction during conveyance, and the belt is laterally displaced. However, if this is not corrected, for example, the exposure position and the transfer position may be shifted to the left and right, and normal operation may not be performed. In order to eliminate such problems, meandering prevention guides are attached to both side edges of the endless belt along the movement direction, and the side surface of this guide slides against the side surface of each roller to prevent the endless belt from meandering. Therefore, it is possible to use rubber, elastic plastic, or the like having flexibility, wear resistance, and bending resistance as a guide for that purpose.

However, especially those used as a recording medium base for an endless belt recording medium are polyester, polycarbonate, polyamide, etc., which are easy to use for adhering the above guide to such a recording medium base. However, since there is no effective adhesive and it is difficult to bond the guide without stretching it at the time of bonding, there is a drawback that the endless belt is distorted by this guide even if bonded.

[0004]

[Problems to be solved by the device]

 Therefore, the object of the present invention is to eliminate the drawbacks of the conventional endless belt as described above, to easily adhere the guide to the recording medium base without stretching, and to distort due to the adhered guide. There is no need to provide an endless belt that can prevent meandering more easily.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a meandering prevention guide formed on a belt surface of at least both side edges of a belt body in a projection shape made of a hot-melt type binder resin along a moving direction. It is characterized by having.

[0006]

[Action]

 In the endless belt, an endless belt main body 6 is stretched between a driving roller 1 and a driven roller 2, and a meandering prevention guide 4 formed in a protrusion shape is driven inside both side edges of the belt main body 6 along the moving direction. It moves while slidingly contacting both side edges of the roller 1 and the driven roller.

[0007]

【Example】

 Embodiment 1 In FIGS. 1 and 2, reference numerals 1 and 2 respectively denote a driving roller and a driven roller, over which an endless belt body 6 is stretched, and an end portion 5 of the belt body 6 is joined by ultrasonic welding. . A tension spring 3 is installed on the machine frame and acts on the driven roller 2 to tension the endless belt. Reference numeral 4 denotes a hot-melt type binder resin meandering prevention guide formed in a protruding shape by using a hot-melt gun (trade name: ADOS Hot Shotgun) along the moving direction on both sides of the belt body 6. .

In the endless belt, an endless belt main body 6 is stretched between a driving roller 1 and a driven roller 2, and a meandering prevention guide formed on both side edges of the belt main body 6 along a moving direction in a protruding shape. 4 moves while slidingly contacting both side edges of the driving roller 1 and the driven roller, and at this time, the meandering prevention guide 4 prevents the endless belt from meandering.

The above endless belt was manufactured as follows. As the belt body 6, a lithographic polyester film having a thickness of 100 μm, a length of 450.5 mm and a width of 300 mm is used, and the guide 4 has two types of guides 4'of different shapes as shown in FIGS. , 4 ". The guide 4'is made of a Teflon sheet with a thickness d of 0.5 mm, which is cut out in a slender shape with a width W of 3.0 mm, placed on both side edges of the belt main body 6, and melted polyester hot melt. 5 is a cross section of a protrusion-like meandering prevention guide formed by peeling the sheet after the temperature has dropped due to pouring of the binder resin and the flow has stopped. The guide 4 ″ has a height d ″ shown in FIG. The hot melt type binder resin was made to flow out to both side edges of the belt body 6 by the nozzle 7 having an outlet of W ″ 3.8 mm, the thickness d ′ was 0.6 mm, and the width W ′ was 4.0 mm. 3 is a cross section of a meandering prevention guide that is open. In the above, as the hot-melt type binder resin, a polyester-based resin with excellent adhesive strength and mechanical strength is used. Melting is performed at 180 ° C. To improve the adhesive strength, the belt main body is used. 6 was preheated at 80 ° C.

As shown in FIGS. 1 and 2 equipped with the guides 4 ′ and 4 ″ as described above, as a result of carrying out a continuous transportation test for 30 hours under the following conditions, the meandering of the belt is suppressed, and further, the belt is restrained. Environmental conditions: 20 ° C, 55% RH to 22 ° C, 60% RH Transport speed: 150 mm / sec Belt tension: 2.5 Kg / full width Drive roller: 20 mm diameter 290 mm wide rubber driven roller ....... 20 mm in diameter and 290 mm wide made of aluminum and the end surface is chamfered with thread.

Comparative Example A urethane rubber guide having a thickness of 0.5 mm and a width of 3.0 mm was adhered to both side edges of the same belt body 6 as described above by using a rubber adhesive having excellent adhesiveness and flexibility. When the product was subjected to a transport test under the same conditions as those described above, the guide peeled off after 8 hours, and the adhesive remained on the trace. This means that the guide was intermittently subjected to a shearing force for a long time when the meandering was prevented, and the guide was gradually displaced due to insufficient peeling strength of the adhesive, and was peeled off at the end.

Embodiment 2 In FIG. 6, guides 14 are formed on both side edges of the belt body 6 10 mm inward from the end edges in the same manner as the guide 4 ″ of Embodiment 1, and the driving roller 11 and the driven roller (FIG. An annular groove 18 is formed in a portion corresponding to the guide 14 (not shown), and the guide 14 is slidably fitted therein, and a conveyance test was conducted under exactly the same conditions as in Example 1. The same result as in Example 1 was obtained.

Third Embodiment In FIG. 7, the guides 24 in the first embodiment are not arranged continuously but are divided into a plurality of pieces and are arranged at intervals.

Fourth Embodiment In FIGS. 8 and 9, the guides 34 are formed on the outer sides of both sides of the belt body 6 as opposed to the first embodiment, so that the guide rollers 19 for guiding the guide rollers 19 face the driven rollers 2. It is arranged.

Fifth Embodiment In FIGS. 10 and 11, the guide 44 has portions projecting inward and outward on both side edges of the belt body 6, and can be replaced in the opposite direction when one side is worn due to use.

As a result of carrying out a continuous 20-hour transport test on the above-mentioned Examples 3 to 5 under exactly the same conditions as in Example 1, the meandering of the belt was suppressed, and furthermore, there was no abnormality of the belt.

[0017]

[Effect of the device]

 This invention is as described above, and since the meandering prevention guides made of hot-melt type binder resin are formed along the moving direction on both side edges of the belt main body, the side surface of this guide is the side surface of the driving roller and the side surface of the driven roller. It does not cause unnecessary meandering motion of the endless belt by sliding on it, and the adhesion between the belt body and the guide is extremely strong, so that the two do not separate even after long-term use. effective.

[Brief description of drawings]

FIG. 1 is a front view of a first embodiment of the present invention.

FIG. 2 is a plan view of the above.

FIG. 3 is a vertical cross-sectional view of an example of the above guide.

FIG. 4 is a vertical cross-sectional view of another example of the above guide.

5 is a perspective view of the guide forming nozzle of FIG. 4. FIG.

FIG. 6 is a partial plan view of the second embodiment of the present invention.

FIG. 7 is a front view of a third embodiment of the present invention.

FIG. 8 is a front view of a fourth embodiment of the present invention.

FIG. 9 is a plan view of a part of the above.

FIG. 10 is a front view of a fifth embodiment of the present invention.

FIG. 11 is an enlarged vertical sectional view of a part of the above.

[Explanation of symbols]

 1,11 Drive roller 2 Driven roller 4,4 ', 4 ", 14,24,34,44 Guide 6 Belt body

Claims (1)

[Scope of utility model registration request] 1. A meandering prevention guide, characterized in that it comprises a meandering prevention guide formed in the form of a protrusion made of a hot-melt type binder resin on at least the belt surface at both side edges of the belt main body along the moving direction. Endless belt with.