JPH03267985A - Web cassette attaching device - Google Patents

Abstract

PURPOSE:To prevent a mistake in attaching a web cassette from being occurred by forming a recessed part on one side part of the web cassette and positioning the web cassette in a state where the projecting part of a supporting means is locked in the recessed part. CONSTITUTION:One projecting line 10 provided in the web cassette 1 is locked in the supporting means 40 through a step part 10a formed on a lower surface. On the lower surface of the other projected line 11, a step part 11a for locking in the other supporting means 41 and the recessed part 12 arranged at the specified position of the step part 11a are provided so that the web cassette 1 is positioned to a fixing device by engaging the recessed part 12 of the projecting line 11 with the projecting part 42 which is provided to protrude upward from the supporting means 41. Thus, the mistake in attaching the web cassette is prevented from being made.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a device used for cleaning and applying oil to a heating roller in a heating roller-type fixed stone device. Accommodate, fixed @'6A
This invention relates to a web cassette provided with a means for accurately attaching a web cassette to a fixing device when it is attached to a position corresponding to a heating roller of @.

(Prior Art) A heating roller type fixing device includes a heating roller that houses a lamp as a heat source inside, and a pressure roller that presses the heating roller with a predetermined pressure. In between, heat and pressure are applied through the paper carrying the toner image to melt and fix the toner.

In the fixing device configured as described above, there are problems in that the surface of the heating roller is stained with toner, and paper may also adhere to the surface of the roller. Therefore, in order to prevent the above-mentioned inconvenience from occurring, oil for preventing offset is applied to the surface of the heating roller, and the roller surface is cleaned by the oil application means.

As the above-mentioned means, for example, Japanese Patent Application Laid-Open No. 58-1
As shown in Japanese Patent No. 82670, etc., a device has been proposed that uses a garment made of thin paper or nonwoven fabric impregnated with oil for offset protection.

In the case of a coating device using a web as in the conventional example, the web is driven at a very low speed or is driven intermittently while cleaning the surface of the heating roller and applying oil. This has the advantage that maintenance and the like can be easily performed.

In the conventional apparatus using a garment as described above, the web, the pressing roller, the web drive mechanism, the housing, etc. are integrated, so that after using the garment, not only the garment but also the It is constructed so that its attached parts can also be discarded.

In the conventional fixing device as described above, when a web cassette using a web is arranged at the top of the fixing device and the web is pressed against a heating roller by a pressure roller, generally, the pressure roller is attached to the web cassette. are arranged integrally, and cleaning and oiling operations can be performed by the wear only by attaching a cassette.

(Problems to be Solved by the Invention) As described above, when the web cassette is set on the upper part of the fixing device and the heating roller is cleaned and oiled, it is difficult to accurately set the web cassette. It is necessary to position.

However, when the image forming apparatus is in operation, the temperature of the fixing device is extremely high, and installing the web cassette above it may be difficult for inexperienced operators to avoid touching the surrounding high-temperature components. It is necessary to pay close attention to the following.

Therefore, a locking means is provided to protrude from the frame of the fixing device, and by providing protrusions on both sides of the web cassette that engage with the locking means, the web cassette can be attached to the top of the fixing device. It has been proposed to be able to attach and position the device by simply placing it on the device, and also to eliminate the need for the above-mentioned inquiry during installation.

However, even if the web is made into a cassette and configured to be installed on the top of the fixing device, an unskilled operator may have to reverse the installation direction or reverse the front and back. There is a need for the development of a means to eliminate such mistakes and to accurately mount the web cassette.

(Object of the Invention) The present invention prevents the above-mentioned mistakes in mounting the web cassette, and includes forming a recess on one side of the web cassette, and locking the protrusion of the support means in the recess. It is an object of the present invention to provide a means for accurately positioning a web cassette in a state in which the web cassette is held in place, thereby preventing the occurrence of incorrect mounting.

(Means and effects for solving the problems) The present invention has the following features:
A web housed in an oil-impregnated web cassette is pressed against a heating roller of a heating roller type fixing device, and the web is used to perform cleaning and oil application. The present invention relates to a device configured to position the web cassette by providing protruding stripes on both sides and engaging supporting means provided on a fixing device with the protruding stripes.

In the present invention, one of the protrusions provided on the web cassette is engaged with the support means via a step formed on the lower surface, and the lower surface of the other protrusion is provided with a step that is engaged with the other support means. and a recess disposed at a predetermined position of the step, and the recess of the protrusion is engaged with the protrusion of the support means, and the protrusion is provided to protrude upward from the support means. , using means for positioning the web cassette relative to the fixing device.

With the configuration described above, in the present invention, the top cover of the fixing device can be closed only when the supporting means provided on the frame of the fixing device and the engaging means formed on the web cassette match. As a result, the operator will be able to notice errors in mounting at an early stage, and can easily make corrections.

Further, in the present invention, since the web cassette can be accurately positioned above the fixing device, it is possible to accurately perform operations such as lubricating the heating roller using the web.

EXAMPLES According to the illustrated example, the installation of a web cassette according to the invention describes the construction of the device.

In the example shown in FIG. 1 in which a web cassette is arranged on the heating roller of the present invention, the web cassette 1 has a recessed housing 2.2a arranged with the openings facing each other, and the two housings 2.2a A shaft 6.8 is arranged at the center of each of the webs 5, and both ends of the web 5 are fixed to the shafts.

The two shafts arranged inside the web cassette are configured as a feed-out shaft 1116 and a take-up shaft 8, respectively, and when the web is fed out from one shaft to the other shaft, the web 5 is Opening 3 between two housings
It is designed to be moved across the

In order to press the web 5 against the heating roller 21, a pressing roller 15 is installed at the opening 3 from above. Note that the pressure roller will be explained in detail in the embodiments to be described later.

Projections 10 and 11 are provided on the outside of the housing 2.2a on both sides of the web cassette 1 to protrude, respectively, and stepped portions 10a and 11a are provided at the lower portions of the projections, respectively.

Among the stepped portions provided on the two protrusions, one stepped portion 10a
is a stop plate 40 provided protruding from the frame of the fixing device.
The other stepped portion 11a is locked to the tie bar 41, and in this state, the web cassette 1 can be mounted on the upper frame of the fixing device. In the above embodiment, the tie bar 41 is formed by bending a sheet metal into a substantially U-shape, and the protrusion 42 is formed by bending a part of the sheet metal into a substantially arc shape from the top of the tie bar. It is configured as a set-up.

In the web cassette 1 of the present invention, a concave portion 12 that opens toward the bottom is provided in the negative protrusion 11, and a protrusion 42 disposed at the top of the tie bar 41 is provided with respect to the concave portion 12. I'm trying to get them into it.

The relationship between the concave portion of the protrusion and the protrusion of the tie bar is as shown in Section 1a.
It can be configured as shown in the figure.

In the embodiment of the present invention shown in FIG. 1a, the protrusion 42 protruding from the upper part of the tie bar 41 is configured as a semicircle having a curvature of half qr, and the end of the arc is a circle. extends horizontally to the center of the

In addition, the recess 12 provided in the protrusion 11 of the web cassette is
The depth of the cut is set such that the arc-shaped protrusion 42 enters. For example, when removing the web cassette, do not lift the web cassette vertically against the tie bar, but rotate it around the tie bar.
Even when the protrusion is lifted in the n1 direction or in the counterclockwise direction, the protrusion is prevented from getting caught on the side wall of the recess 12.

Therefore, by configuring the protrusion 42 and the recess 12 as described above, it is possible to prevent problems such as damage to both members during logging of the web cassette.

The relationship between the web cassette and the tie bar of the present invention is actually configured as shown in FIG. In the example shown in FIG. 2, the tie bar 41 is connected to the fuser side frame 45.
5a, both ends of which are fixed, and are arranged parallel to the web cassette 1.
Two protrusions 42 and 43 are provided.

On the other hand, two recesses 12 and 13 are arranged on the protrusion 11 of the web cassette 1 in correspondence with the protrusions, and the respective protrusions and recesses are engaged with each other. Note that the locking means provided on the web cassette and the tie bar are set as shown in FIG. 2a, and the recess 12 engages with the protrusion 42. 43 is engaged with the recess 13.

In the relationship between the protrusion and the recess, the width a of one of the recesses 12 is set wider than the width of the protrusion 42, so that it can be moved in the length direction when the web cassette is installed. There is. On the other hand, the recess 43 and the protrusion 13 in use are formed to have the same width C, so that one end of the web cassette can be accurately positioned.

Therefore, in the web cassette positioning means of the present invention, the protrusion of the tie bar is engaged with the recess provided in one of the protrusions of the web cassette, so that the mounting direction of the web cassette can be easily adjusted. This can be set to .

Furthermore, since there is no margin in the engagement relationship between the recess 13 and the protrusion 43 of the two recesses 12 and 13, the recess 13 is not engaged with the protrusion 43 when the web cassette is installed. By doing so, the other engaging member can be easily combined.

(Fixing device and web cassette support 11411) The web cassette 1 of the present invention configured as described above has the heating roller 21 of the fixing device 20 as shown in FIG.
is placed in a positioned position on top of the

In the example shown in FIG. 3, the fixing device 20 has a heating roller 21 and a pressure roller 23 disposed facing each other,
Pass the paper bearing the toner image between both rollers,
This is a heating roller type device configured to perform fixing, and a heating device 1[1i1!22, such as a halogen lamp, is provided inside the heating roller 21.

In the fixing device 20, an entrance guide 25 is arranged at the paper introduction section, and the paper carrying the toner image, which is fed by a conveyor belt or the like, is guided between the two rollers.

In addition, a peeling claw 26 for peeling the paper from the heating roller is arranged in the paper ejection section to prevent the paper from adhering to the surface of the heating roller via the melted toner, and to prevent the paper from adhering to the surface of the heating roller, and to prevent the paper from adhering to the surface of the heating roller. Feed the paper toward the ejection roller.

The fixing device provided with the attachment means configured as described above is housed inside the housing 30 and is insulated so that other devices are not affected by the heat of the heating roller. A member for mounting the web cassette 1 is arranged on the upper part of the housing 30.

A stop plate 40 protruding from the inside of the front plate 31 of the housing and a tie bar 41 placed inside the rear plate 33 are disposed at the mounting portion of the web cassette 1 disposed at the upper part of the housing 30. , the step portions 10a, 11a of the web cassette 1 are locked to the support members 40, 41.

The stop plate 40 can be provided by cutting and raising a part of the front plate 31, but the stop plate can also be constructed by attaching other plate members etc. to the front plate. It is possible.

An upper cover 35 that can be opened and closed via a hinge 36 is disposed on the upper part of the housing of the fixing device, and the upper cover 35
A locking arm 38 is attached via a hinge 37 to the release end of the
is provided to lock the claw member 39 at the end of the arm 38 into the locking hole 32 provided in the front plate 31 of the housing.

When the web cassette 1 is mounted on the upper part of the housing 30 and the upper cover 35 is closed, the upper cover 35 can press the upper part of the web cassette 1 and hold it in a fixed position. Therefore, the nib cassette 1 placed at the top of the fixing device can be accurately fixed and held by closing the top cover.

Note that the fixing means for fixing the upper cover 35 to the housing can be achieved by one or more arm members, but the fixing means can be set arbitrarily.

Further, a roller support member 16 is provided downward from a predetermined position of the upper cover 35, and the roller support member 16
A pressure roller 15 is provided at the tip of the web 5, and the pressure roller 15 presses the web 5 toward the heating roller 21.

The pressure roller 15 has a heat-resistant and relatively hard sponge-like roller member attached to the shaft, and is impregnated with a predetermined amount of oil, as in the case of conventionally used pressure rollers. Good effects can be achieved by using these.

Therefore, in the fixing device @20 of the present invention, the operation of fixing the web cassette 1 is performed by opening the upper cover 35, mounting the web cassette 1 on the upper part of the housing 30, and then closing the upper cover 35. It can be done.

Furthermore, if the web cassette is not installed correctly, the tie bar side of the web cassette will be in a floating state, and even if you try to close the top cover 35, it will not be possible to close it, making it easy to install it incorrectly. can be determined.

Then, by closing the upper cover, the web 5 is pressed against the heating roller 21 by the suppression roller 15 passing through and covering the central opening 3 of the web cassette 1, whereby the web applies oil to the heating roller 21. The cleaning action can be performed immediately.

(Configuration of Web Cassette) The web cassette 1 of the present invention has been described based on FIG. 1, but is configured as shown in detail in FIG. 4. The wear storage section of the web cassette 1 is arranged with the groove-shaped housings 2.2a @ openings facing each other, connected by side plates 4.4a on both sides, and between the two housings 2.2a. An opening 3 is provided in the opening 3.

In addition, the material constituting the housing is, for example, a heat-resistant plastic such as polycarbonate resin or other material that has good processability and can withstand the temperature heated by the heating roller (approximately 200°C). Such materials can be used.

As shown in FIG. 2, in the two housings 2.2a, a feeding shaft 6 and a winding shaft 8 are arranged so as to pass through the center of each housing. The ends of the web 5 are fixed and the web 5 is moved across the opening 3 when the garment is fed out from one shaft to the other.

The web 5 is a thin wear-like material made of nonwoven fabric, paper, cloth, etc., as in the case of conventionally used webs, and the web is coated with silicone oil or the like to prevent offset of the fixing device. A material impregnated with can be used.

The feeding shaft 6 and the winding shaft 8 that support the web 5 are arranged so as to pass through one plate at the longitudinal end of the housing 2.2a, respectively, and are arranged so as to pass through one plate at the longitudinal end of the housing 2.2a.
gear 7.9 is installed on the side). Then, the gear is connected to a drive mechanism installed in the main body of the 1ft device,
It is designed to perform the function of winding up the wear.

Further, in the web cassette 1 of the present invention, the protrusions 10.1 are provided on both sides of the two housings 2.2a.
1, and by locking the protrusion 10.11 to the support member of the fixing device, it can be mounted on the fixing device as shown in FIG.

By locking the recess provided in one of the protrusions 11 with the protrusion of the tie bar, it becomes possible to accurately mount the web cassette to the fixing device, and to attach the web cassette to the fixing device. It is necessary to make the web work well.

(Effect of R Light) By having the above-described configuration, the device of the present invention provides a means for easily mounting the web cassette without significantly changing the structure of the tie bar provided in the fixing device or the web cassette. I can do it.

Further, in the present invention, the upper cover of the fixing device can be closed only when the supporting means provided on the frame of the fixing device and the engaging means formed on the web cassette match, so that the operator can close the upper cover of the fixing device. This allows you to notice mistakes in the installation at an early stage, and to easily make corrections.

Further, in the present invention, since the web cassette can be accurately positioned above the fixing device, it is possible to accurately perform operations such as lubricating the heating roller using the web.

The figure is a plan view of the example shown in Fig. 1, Fig. 2a is a perspective view showing the mounting relationship, Fig. 3 is a side view when the web cassette i is mounted on the fixing device, and Fig. 4 is a main FIG. 2 is a perspective view of the web cassette of the invention upside down;

Reference numerals in the figure 1...Web cassette, 2...Housing, 4...Side plate, 5...Web, 6
・8・・・Axis, 10.11・・・Protrusion, 1
2.13...Concavity, 15...Press roller, 20...Fixing device, 21...Heating roller, 23...Pressure roller, 30 ...Housing, 35...Top cover, 40...
Stopping plate, 41... Tie bar, 42, 43...
... protrusion, 45 ... frame.

[Brief explanation of drawings]

Claims (1)

[Scope of Claims] A web stored in an oil-impregnated web cassette is pressed against the heating roller of a heating roller type fixing device, and cleaning and oil application are performed using the web. and an apparatus configured to position the web cassette by providing protruding stripes on both sides of the web cassette and engaging the protruding strips with support means provided on a fixing device, One of the protrusions provided on the web cassette is engaged with the support means via a step formed on the lower surface, and the lower surface of the other protrusion has a step that is engaged with the other support means, and the step is engaged with the support means through a step formed on the lower surface. and a recess disposed at a predetermined position of the fixing device, and a protrusion protruding upward from the support means, and the recess of the protrusion is engaged with the protrusion of the support means. A web cassette mounting device, characterized in that the web cassette is positioned by the user.