JP2002287548A - Liquid agent feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid agent feeder which is capable of uniformly feeding oil to a fixing roller even when the equipment body is installed aslant. SOLUTION: This liquid agent feeder prevents fixing paper moving on a fixing roller surface onto the fixing roller by intermittently feeding a release agent SO by a feeding oil to an oil feeding pipe and feeding the release agent to the surface of the fixing roller 1 through plural holes H of the oil feeding pipe. The oil feeding pipe has a first oil feeding pipe A22b and a second oil feeding pipe B22b. The first oil feeding pipe A22B and the second oil feeding pipe are capable of feeding the release agent SO to the fixing roller 1 or an oil coating application roller 7 and felt 23 for oil feeding at the timing independent from each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing roller or a member capable of supplying a liquid releasing agent (oil) to the fixing roller. And a liquid agent supply device for supplying the liquid agent to the felt.

[0002]

2. Description of the Related Art An image forming apparatus such as a copying machine or a printer is provided with a fixing device for fixing toner transferred to a recording material (paper). Usually, on the surface of the fixing roller provided in such a fixing device, for example, a liquid such as silicone oil is used in order to offset the toner image to the fixing roller and to form a stable image by preventing paper wrapping. Of the release agent (hereinafter abbreviated as “oil”) is supplied in a required amount. Thus, in order to apply oil to the surface of the fixing roller, the fixing device is provided with the release agent supply device.

A conventional fixing device F described in Japanese Patent Application Laid-Open No. 8-137317, which is provided with a release agent supply device as described above.
Will be described with reference to FIGS. 19 to 23.

FIGS. 19 and 20 show a main structure of a conventional fixing device A. FIG. As shown in FIGS. 19 and 20, the fixing device A includes an upper fixing roller (fixing roller) 1 and a lower fixing roller (pressing roller) arranged so as to be in pressure contact with each other.
2 is provided. Each of the upper fixing roller 1 and the lower fixing roller 2 has, for example, a rubber layer made of silicone rubber on an aluminum core, and heaters 3 and 4 formed of a halogen lamp or the like inside the core. It is a configuration provided.

[0005] An upper peeling claw 1 is provided around the upper fixing roller 1.
1, upper cleaning roller 9, upper roller temperature detector 5,
The oil application roller 7 is arranged in series in the above order in the rotation direction of the upper fixing roller 1 (FIG. 20).

[0006] Around the lower fixing roller 2, a plate peeling claw 1 is provided.
2, lower cleaning roller 10, lower roller temperature detector 6
Are arranged in series in the rotation direction of the lower fixing roller 1 in the above order.

The peeling claws 11 and 12 peel off the recording material (paper) wound around the fixing rollers 1 and 2 from the surfaces of the upper and lower fixing rollers 1 and 2.

The cleaning rollers 9, 10 are felt rollers whose surfaces are in sliding contact with the surfaces of the fixing rollers 1, 2, and collect the offset toner adhered to the surfaces of the fixing rollers 1, 2. is there.

The oil application roller 7 is a roller whose surface is made of rubber, and applies the oil SO as a release agent for paper to the surface of the upper fixing roller 1 with which the oil application roller 7 contacts.

The upper and lower roller temperature detectors 5 and 6 are composed of thermistors, and detect the surface temperatures of the fixing rollers 1 and 2 that come into contact with each other. The temperature detection results of the upper and lower roller temperature detectors 5 and 6 are transmitted to a fixing controller (not shown).
Sent to.

The fixing control unit controls the operation of a power supply unit (not shown) based on the detection results of the upper and lower roller temperature detectors 5 and 6 so that the heat sources in the respective fixing rollers 1 and 2 can be used. The heaters 3 and 4 are turned on / off to adjust the temperatures of the upper and lower fixing rollers 1 and 2.

Next, the details of the method of supplying oil to the oil application roller 7 in the release agent supply device for applying oil SO to the upper fixing roller in the fixing device F described above will be described below.

The release agent supply device includes an oil tank 20, an electromagnetic pump 21, a tubular member 22a, an oil supply pipe 22b, an oil application roller 7, an oil supply felt 23, an application blade 24, an oil pan 25, and an oil return. And an oil remaining amount detection sensor 27.

An oil tank 2 provided below the fixing device A (inside and outside the fixing device) and capable of injecting oil from outside.
The oil SO is injected into 0. From the oil tank 20, a tubular member 22a is provided by a piezo-type or electromagnetic pump 21 installed above the oil tank.
To suck up the oil SO. The tubular member 22a is connected to an oil supply pipe 22b extending in the longitudinal direction of the fixing rollers 1 and 2, and the sucked oil SO is supplied to the oil supply pipe 22b. The fixing roller 1,
A plurality of holes H are provided at the same height on the upper surface side so as to enable uniform oil supply in the longitudinal direction. The oil SO discharged through the plurality of holes H is applied to the oil application roller 7 and an oil supply felt which is pressed against the oil application roller 7 and is provided for a role of further stable oil supply to the application roller. 23, drops and falls like rain.

The most downstream end T (FIG. 21B) of the oil supply pipe 22b is treated so as not to leak the oil SO (in this case, caulking treatment (the tip is crushed by a press or the like). ), So that the oil SO does not flow out of the holes other than the plurality of holes.

The oil SO dropped from the oil supply pipe 22b is supplied directly from the plurality of holes H or through the oil supply felt 23 to the oil application roller 7.
Supplied to In order that the oil SO supplied to the oil application roller 7 can be further applied to the surfaces of the fixing rollers 1 and 2 in the form of a thin film in a uniform and constant amount, the oil SO of the oil application roller 7 is applied by an application blade 24 made of a rubber member.
Is uniformed.

The oil application roller 7 is provided by the oil supply means (oil tank 20, electromagnetic pump 21, tubular member 22a, oil supply pipe 22b, oil application roller 7, oil supply felt 23, application blade 24). Excess oil SO not used for oil application to the oil pan is recovered by the oil pan 25 of a dish-shaped member installed below the application roller 7 and the oil supply felt 23, and the oil returned to the oil pan 25 is connected to the oil pan 25. Is returned to the oil tank 20 by the tubular member 26.

With the above-described oil application system, the silicon oil SO is circulated in the oil supply or application device, and is installed in the oil tank 20 when the amount of oil in the oil tank 20 required for circulation is likely to be insufficient. The situation is detected by the remaining oil level detection sensor 27, and the user can be prompted to replenish the oil with an operation panel or the like (not shown), or the machine can be temporarily controlled to be in an unusable state. In this case, control for enabling normal operation at the time of oil injection can also be performed.

In the oil supply and coating system in the fixing device described above, the balance of the oil supply in the longitudinal direction of the fixing roller is very important. If the supply of oil to the fixing roller is partially insufficient, problems such as wrapping of the paper and offset of the toner image occur.

Therefore, as described above, a plurality of holes H arranged in the longitudinal direction of the fixing roller are formed in the oil supply pipe 22b upward (upper side) with respect to the normal machine installation surface (ground). By doing so, when the apparatus is installed horizontally, the oil SO is discharged (supplied) from all the holes H substantially simultaneously.
(See FIG. 21).

As shown in FIG. 21, the oil supply is balanced with the hole diameters H1 through H5 of the pump H.
(H1 <H2 <
H3 <H4 <H5).

[0022]

However, in the above-mentioned conventional fixing device A, the electromagnetic type oil SO supply pump 2, which is usually used because it is inexpensive, supplies the oil SO by a predetermined amount by an intermittent operation. are doing. Therefore, as shown in FIG. 22, the amount a of the oil SO discharged from the hole H on the base end Ba side close to the oil supply pump among the plurality of holes H provided in the oil supply pipe is equal to the tip T. The oil supply amount c is larger than the oil supply amount c on the side, and drops to a place other than a place to be supplied (the surfaces of the fixing rollers 1 and 2, the oil application roller 7, and the felt 23). Such oil leakage causes a problem that the inside of the apparatus main body and the floor on which the apparatus main body is installed are soiled.

Further, there is almost no place where the machine is completely horizontal, and the apparatus itself may be installed at an angle. In this manner, the oil supply pipe 22b is inclined due to the inclination of the apparatus body itself. As shown in FIG. 23, for example, when the tip side T (the downstream side in the oil supply direction) of the oil supply pipe 22b is inclined so as to be higher, the oil SO completely reaches the tip side T of the oil supply pipe 22b. It becomes difficult to be supplied. Therefore, it becomes difficult to supply the oil SO from the hole H on the tip end side T of the oil supply pipe 22b. For this reason, uniform oil supply in the longitudinal direction of the fixing roller 1 cannot be performed, and there is a problem that a toner image is offset or paper is wrapped in a portion where the oil is insufficient.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide a liquid agent supply device capable of uniformly supplying oil to a fixing roller even when an apparatus main body is inclined. The purpose is to provide.

[0025]

The present invention has the following configuration to achieve the above object. A first gist of the present invention is to provide a rotating roller having a predetermined length and rotating about an axis in the longitudinal direction, and / or supplying a liquid agent to the rotating roller provided in parallel with the rotating roller. A cylindrical member of a predetermined length provided with a plurality of holes in the axial direction of the upper surface, and a supply pump for intermittently supplying the liquid agent to the cylindrical member, A liquid agent supply device that supplies the liquid agent supplied to the cylindrical body from the supply pump to the surface of the rotating roller through a plurality of holes, thereby preventing the paper moving on the surface of the rotating roller from being fixed to the rotating roller. In the above, the cylindrical body has a first cylindrical body and a second cylindrical body, and the first cylindrical body and the second cylindrical body rotate the liquid agent at a timing independent of each other. Alternatively, there is provided a liquid agent supply device characterized in that it can be supplied to a supply member.

According to the first aspect of the present invention, even when the supply pump intermittently supplies the liquid agent, at least the first cylindrical body and the second cylindrical body are provided. By making it possible to supply the liquid agent to the rotating roller or the supply member at a timing independent of each other, the shortage of the liquid agent due to the first cylindrical body caused by the intermittent supply can be compensated for by the intermittent supply of the second cylindrical body. . Therefore, various liquid agent supply patterns can be freely set, stabilization of the liquid agent supply amount, and a margin U for the specification of the inclination amount when the apparatus is installed.
P and the liquid agent can be uniformly supplied to the rotating roller and / or the supply member.

According to a second aspect of the present invention, there is provided the liquid agent supply device according to the first aspect, wherein the first cylindrical body and the second cylindrical body have different hole arrangement patterns.

According to the second aspect of the present invention, various liquid agent supply patterns can be realized by arbitrarily selecting a hole arrangement pattern. For example, even if the desired liquid agent cannot be uniformly supplied to the rotating roller and / or the supply member by the first cylindrical member depending on the installation inclination of the apparatus, the second cylindrical member appropriately controls the shortage. Can be supplemented.

When the hole arrangement pattern is provided for each rotary roller region (use region) for supplying the liquid agent, the liquid agent can be supplied without waste. Therefore, the excess liquid agent does not stain the inside of the apparatus or the place where the apparatus is installed by dropping from the rotating roller or the supply member, and when the rotating roller is used next time because the rotating roller itself becomes dirty. Contamination can be prevented.

A third aspect of the present invention is the liquid agent supply device according to the first aspect, wherein the supply pump is provided for each of the first cylindrical body and the second cylindrical body.

According to the third aspect of the present invention, by providing the supply pump for each of the cylindrical bodies, the liquid agent can be surely supplied to the first and second cylindrical bodies at independent timing. Can supply.

A fourth gist of the present invention resides in that the hole of the first cylindrical body is located within a range corresponding to a first range of the rotating roller or the supply member in the longitudinal direction of the first cylindrical body. Provided in
The liquid agent supply device according to claim 1, wherein the hole of the second cylindrical body is provided in a second range corresponding to a longitudinal length of the rotating roller or the supply member.

According to the fourth aspect of the present invention, when the rotary roller uses a plurality of types of ranges, when the first range is used, the liquid agent can be supplied only to that region, and the waste liquid can be supplied. The use of the liquid agent is prevented, and leakage of the liquid agent into and out of the apparatus due to excessive supply is also prevented. When a rotary roller is used with the entire width, the second cylindrical body is used. Therefore, appropriate supply can be made for each application.

According to a fifth aspect of the present invention, the hole of the first cylindrical body is provided within a range corresponding to the first range of the rotating roller or the supply member in the longitudinal direction of the first cylindrical body. Provided in
The liquid agent supply device according to claim 1, wherein the hole of the second cylindrical body is provided at least in a second range other than the first range of the rotating roller or the supply member.

According to the fifth aspect of the present invention, when a plurality of types of rotating rollers are used, when the first range is used, the liquid agent can be supplied only to that region, and the waste liquid can be supplied. The use of the liquid agent is prevented, and leakage of the liquid agent into and out of the apparatus due to excessive supply is also prevented. Further, when the rotating roller is used with the entire width, the first and second cylindrical bodies are used. Therefore, appropriate supply can be made for each application.

A sixth gist of the present invention is that the supply direction of the liquid agent to the first tubular body and the second tubular body is substantially opposite to each other with respect to the longitudinal direction of the rotating roller or the supply member. The liquid agent supply device according to the first aspect, characterized in that there is a liquid agent supply device.

Since the supply pump supplies the liquid agent by the intermittent operation, a large amount of the liquid agent comes out of the hole near the supply pump, and the uniformity of the liquid agent supply in the longitudinal direction of the rotating roller or the supply member is lost. . In contrast, the sixth embodiment of the present invention
According to the gist of the invention, by supplying the liquid agent separately to the rotating roller or the supply member from the opposite direction, it is possible to prevent the imbalance of the supply of the liquid agent in the longitudinal direction of the rotating roller or the supply member, thereby uniformity. Can be supplied to still,
The liquid agent may be directly supplied to the fixing roller 1 or the pressure rotor 2.

According to a seventh aspect of the present invention, the first cylindrical body is provided with a supply port at a first end side of a rotary roller or a supply member, and the rotary roller or the supply member is provided with a supply port substantially in the longitudinal direction. The second cylindrical body has a length up to a central portion, and the second cylindrical body has a supply port provided at a second end side of the rotary roller or the supply member, and a substantially central portion in a longitudinal direction of the rotary roller or the supply member. The liquid agent supply device according to the sixth aspect, characterized in that the liquid agent supply device has a length of:

According to the seventh aspect of the present invention, the length of the two cylindrical bodies is shortened, and the difference in the amount of the liquid agent coming out of the holes at both ends becomes larger in proportion to the length of the cylindrical bodies. Can be reduced, and uniform liquid agent supply can be realized.

According to an eighth aspect of the present invention, in the sixth aspect, the first cylindrical body and / or the second cylindrical body are arranged such that the distal end side is lower than the base end side. Liquid agent supply device.

The place where the apparatus main body is installed is not always horizontal. Therefore, when the apparatus main body is installed inclined, the tubular body may be inclined in the axial direction. At this time, if the distal end side of the cylindrical body is set to be higher than the base end side, the cylindrical body on the distal end side will not be sufficiently filled with the release agent. For this reason, there is a problem that the liquid agent is not sufficiently supplied from the hole provided on the tip side. On the other hand, according to the eighth aspect of the present invention, the inclination of the first and second cylindrical bodies is made different, so that the first and second cylindrical bodies are installed even when the apparatus main body is installed at an angle. Since the body is inclined in the opposite direction, it is possible to prevent the supply balance of the liquid agent from being disturbed compared to when the first and second cylindrical bodies are horizontally installed, and the inclination margin is increased. . Thus, the liquid agent can be uniformly supplied to the rotating roller or the supply member even when the apparatus main body itself is installed inclined.

A ninth aspect of the present invention is the first aspect, wherein the first and second cylindrical bodies have different inner diameters.
In the fixing device.

According to a ninth aspect of the present invention, the first and the second
The volume of the inside of the cylindrical body is different, and there is a difference in the time when the liquid agent starts to come out from the hole of the cylindrical body. For example, by using a cylindrical body with a small inner diameter, the liquid can be quickly supplied to the rotating roller. Can be. Therefore, supply timings with various variations can be realized.

[0044]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing a schematic configuration diagram of a fixing device Fb according to the present embodiment.
FIG. 2 is a side view showing a schematic configuration of the fixing device. In the configuration of the fixing device Fb according to the present embodiment, the same components as those of the conventional fixing device F shown in FIGS. 18 and 19 are denoted by the same reference numerals, and detailed description thereof is omitted. The features of the embodiment will be described below.

(First Embodiment) A fixing device B of the present embodiment has an oil supply pump, a conventional oil supply pump, and a conventional fixing device A in order to prevent uneven supply of oil SO to the fixing roller. An oil supply pipe is further added, and a route for supplying the oil SO from the oil tank 20 to the oil application roller 7 has a plurality of routes, in this embodiment, a two route configuration.

The release agent supply device of this embodiment comprises an oil tank 20, two oil supply pumps A21, B21,
Two tubular members A22a and B22a, two oil supply pipes A22b and B22b, an oil application roller 7, an oil supply felt 23, an application blade 24, an oil pan 25, an oil return tubular member 26, and the remaining amount of oil. It has a detection sensor 27.

The oil SO in the oil tank 20 is sucked up by separately and independently controllable oil supply pumps A21 and B21 installed on the upper part of the oil tank 20 and connected to the respective pumps A21 and B21. The upper roller 1, via the A-shaped members A22a and B22a,
Each oil supply pipe A2 extending in the longitudinal direction of the lower roller 2
2b and B22b.

Each of the oil supply pipes A22b and B22b has a plurality of holes H on the upper surface side (in the present embodiment, in order to enable uniform oil supply in the longitudinal direction of the upper fixing roller 1 and the lower roller 2). (Vertical direction). The oil supply roller 7 and the oil supply felt 23 which is pressed against the oil application roller 7 from the plurality of holes H and is provided for the role of further stable oil supply to the application roller 7.
The oil is supplied to the oil application roller 7 by dropping the oil SO in a rainy state.

Each oil supply pipe A of the present embodiment
As shown in FIG. 3, the oil supply holes H provided in the oil supply pipe 22B and the oil supply pipe B22b respectively
The hole position and the hole interval are different from the oil supply felt 23. Specifically, the oil supply pipe A22
The hole H of b is provided with five holes H of the same diameter along the longitudinal direction of the pipe concentrated at substantially the center position of the pipe range corresponding to the longitudinal direction of the application roller 7. On the other hand, in the hole H of the other oil supply pipe B22b, five holes H of the same diameter are provided along the longitudinal direction of the pipe at equal intervals throughout the pipe range corresponding to the longitudinal direction of the application roller 7. .
The diameter, the number, the interval, the provided range, and the like of the holes H are arbitrarily determined in consideration of the use and the like.

Next, the operation of the oil supply mechanism will be described. The electromagnetic oil supply pumps A21 and B21 draw oil SO from the oil tank 20 by intermittent operation, respectively.
However, since there are a plurality of oil supply pipes (two in this embodiment: A22b and B22b), the pumps A21 and B21 can be individually set to arbitrary ones according to the required print specifications (paper passage). By operating at the timing, the intermittent timing of the entire oil SO can be controlled, and an optimal amount of oil can be supplied to the application roller 7 and the oil supply felt 23.

Each oil supply pipe A22b, B2
Various oil supply can be performed by arranging the arrangement of the oil supply holes H provided in 2b different from each other as shown in FIG.

FIGS. 4 (a) to 4 (c) show supply to the application roller 7 and the oil supply felt 23 when the pumps A21 and B21 corresponding to the two pipes A21b and B21b are separately operated. (The vertical axis represents the amount of oil, and the horizontal axis represents the longitudinal position of the application roller 7 and the oil supply felt 23 (reference F is the front side of the apparatus, and reference R is the back side of the apparatus). ).

FIG. 4A shows the relationship between the oil supply amount and the supply position when the oil is supplied only from the pipe A21b provided with the hole H concentrated substantially at the center position of the pipe range, and shows a small paper size. It is suitable for printing, and can supply oil without waste. That is, since the oil is conventionally supplied uniformly in accordance with the maximum width, when the B5 paper is passed through a small paper size, the oil SO in an area where there is no paper becomes excessive, which may cause an oil leak or a residual oil. Although the amount of oil causes oil stains at the time of the next paper passing, the above configuration eliminates problems such as excess oil at both ends.

FIG. 4B shows the relationship between the oil supply amount and the supply position when oil is supplied only from the pipe B21b provided with the hole H in the entire pipe range, and is suitable for printing with the maximum width of the paper size. ing.

FIG. 4C shows pipes A21b and B21b.
FIG. 4 shows the relationship between the oil supply amount and the supply position when oil is supplied from the pipe A21b.
Supply range is slightly increased. Accordingly, when a plurality of paper sizes are passed, a large amount of oil SO can be supplied to a portion corresponding to a small paper size to be used or a frequently used paper size. It is possible to prevent the occurrence of oil shortage in frequently-used portions.
In this case, in order to prevent a shortage of oil with an appropriate amount of oil as compared with a case where the amount of oil ink of the entire width is always increased, the application roller 7 or the oil supply felt 2 by excessive oil supply is used.
3 prevents oil leakage from leaking from the inside of the apparatus and the floor of the apparatus installation location with oil SO, and also prevents useless use of oil SO.

As described above, the oil supply pipes A22b and B22b, which can supply oil independently of each other,
By providing the oil supply holes H in different arrangements, it becomes possible to supply the oil in accordance with the print specifications such as the paper passing timing and the paper passing size. Non-uniformity of SO can be prevented. The diameter, number, interval, and range of the holes H are determined in consideration of the number of oil supply pipes, print specifications, and the like. The holes H and the oil supply pipes A22b, B2
Other embodiments of 2b will be described below.

(Second Embodiment) FIG. 5 shows the configuration of an oil supply pipe according to a second embodiment. The difference from the first embodiment is that the oil supply pipe B
The point is that an oil supply pipe B22c having a different arrangement of the holes H is provided instead of the oil supply pipe 22b.

The arrangement of the holes H of the oil supply pipe B22c is different from that of the oil supply pipe A22b in that the pipe H
In the range corresponding to the application roller 7 of 22c, three are provided at both ends along the longitudinal direction. In other words, the holes H are arranged so that the oil supply pipes A22b and B22c can be combined to supply the oil uniformly to the application roller 7 and the oil supply felt 23.

FIG. 6A shows both oil supply pipes A22
The relationship between the oil amount (vertical axis) and the pipe position (horizontal axis) in the case of oil supply is shown using b and B22c. In such a case, since the holes H of both the oil supply pipes A22b and B22c are provided so as to complement each other in the entire longitudinal direction of the application roller 7 and the oil supply felt 23, the uniformity is provided throughout the entire area. Can supply oil. Therefore, it is suitable for printing on a paper size corresponding to the longitudinal width of the application roller 7 and the oil supply felt 23.

FIG. 6B shows an oil supply pipe A22b.
It shows the oil supply amount and positional relationship using only
It is suitable for printing on a paper size corresponding to the width of the hole H provided in the oil supply pipe A22b.

As described above, by selectively operating the pipe for supplying the oil SO according to the paper size, it is possible to appropriately prevent oil shortage and oil leakage.

The arrangement of the holes H in the oil supply pipe B22c is such that the same number of holes H are provided on the front side F of the apparatus and on the rear side R of the apparatus.
If the oil supply amount is smaller than the oil supply amount, the oil supply amount on the device rear side R can be increased by increasing the number of holes H on the device rear side R or replacing the pipe with a larger hole diameter. FIG. 6 shows the oil supply amount and the positional relationship in such a configuration.
It is shown in (c).

(Third Embodiment) FIGS. 7 and 8 show oil supply pipes A22d, B22d, and C22 of this embodiment.
d and D22d are shown. The oil supply pipe C22d shown in FIG. 7 has a predetermined width of the pipe, for example, a width corresponding to a small paper size, and is located from the front side of the apparatus (front side, side end near the pump) to the rear side of the apparatus (rear side, far from the pump). The configuration is such that the interval between the holes H is gradually increased according to the side end portion), thereby enabling uniform oil supply.
In the present embodiment, the hole H of the oil supply pipe C22d is provided substantially at the center of the pipe range corresponding to the longitudinal direction of the application roller 7.

The oil supply pipe D22 shown in FIG.
The arrangement of the holes H of c is provided at three ends along the longitudinal direction at both ends in a range corresponding to the application roller 7 of the pipe B22c, in contrast to the oil supply pipe C22b. That is, both oil supply pipes C22b, D2
The holes H are arranged so that the oil can be supplied substantially uniformly to the application roller 7 and the oil supply felt 23 by adjusting 2c.

With the above configuration, the oil supply pipe C22
Due to the operation of the pumps C21 and D21 provided separately for d and D22d, for example, as shown in FIG.
When the sheet size is A3, only one pump C21 is operated (a).
By operating D21 and D21, oil can be supplied according to the paper size (b).

The oil supply pipe A22d shown in FIG.
Five holes H of the same diameter are provided along the longitudinal direction of the pipe at equal intervals throughout the pipe range corresponding to the longitudinal direction of the application roller 7 throughout the pipe, thereby enabling uniform oil supply.

The oil supply pipe B22 shown in FIG.
In d, a hole H is provided near the center in the longitudinal direction with respect to the oil supply pipe D22d, and a width larger than the supply width of the oil supply pipe A22d enables uniform oil supply.

With the configuration shown in FIG. 8, one pump (A21 or B21) can be used when the amount of oil SO is small, such as in the case of single-sheet printing in which a copy is printed in size 1.
Only two pumps (A21) are operated (FIG. 10 (a) or FIG. 10 (b)).
And B21), the hole H patterns of the two pipes are individually operated (FIG. 10C), and oil can be supplied according to the number of sheets passed. This allows oil supply over a wide variety of paper sizes.

Therefore, by arranging the oil pump for each pipe, it is possible to freely adjust the oil and various oil supply patterns, stabilize the oil supply amount, and increase the margin UP for the specification of the inclination amount when the machine is installed. Further, the release agent can be uniformly supplied to the fixing roller or the pressure roller.

(Fourth Embodiment) FIG. 11 shows oil supply pipes A22d and B22b of this embodiment. The two pipes A22d and B22b are configured such that the supply direction of the release agent is opposite to the oil supply direction from the pump with respect to the longitudinal direction of the application roller 7 and the oil supply felt 23. With such a configuration, the oil supply pipe is inclined because the installation position of the apparatus main body is not horizontal. For example, as shown in FIG.
Even if the rear side R of 22d is higher than the front side F and the oil SO is not sufficiently supplied to the oil supply pipe A22d on the rear side R, it is close to the pump B21 of another oil pipe B22b. The oil can be supplied to the rear side R with priority over the hole H on the side (rear side R).
In this case, the front side F of each pipe A22d, B22b
12 (a) and 12 (b) show the amount of oil (vertical axis) in the positional relationship (horizontal axis) from to the rear side R. And
When the oil supply from the two pipes A22d and B22b is combined, the oil supply becomes uniform as shown in FIG. 11 (c), and the supply of the oil SO becomes uniform between the front side F and the rear side R of the apparatus. Be transformed into

As a result, when the apparatus itself is installed in an inclined state with one pipe as in the prior art, the oil SO may not be supplied uniformly in the longitudinal direction. The oil SO in the oil pipes A22d and B22b is opposite to the application roller 7 and the oil supply felt 23 so that the silicone oil S
O can be uniformly supplied in the longitudinal direction of the oil application roller 7 and the like.

(Fifth Embodiment) FIG. 13 shows the structure of oil supply pipes A22e and B22e of the present embodiment. One oil pipe is provided from the machine front side F to the center and the other oil pipe is provided. A pipe is provided from the machine rear side R to the center.

In the configuration in which one oil supply pipe is provided from the front side F to the end on the rear side R, the amount of oil supply to a location far from the pump (downstream of oil circulation) is reduced (FIG. 14A). 13), by arranging the two cylindrical bodies from both sides to the center as shown in FIG. 13, the decrease in the oil supply amount based on the supply distance from the pump reaches the center of the oil pipe, and the decrease amount is As compared with a single oil pipe, the oil supply is halved (FIG. 14B), and uneven oil supply due to the collapse of the oil supply balance can be prevented. In addition, it is possible to prevent the release agent from leaking due to excessive oil supply to one side and to prevent the inside of the apparatus and the installation location of the apparatus from being soiled.

(Sixth Embodiment) FIG. 15 shows the configuration of oil supply pipes A22d and B22b according to the present embodiment, in which two oil supply pipes A22d and B22b are used.
The two oil supply pipes A22 have a configuration in which the supply direction of the oil SO is opposite to the longitudinal direction of the application roller 7 and the oil supply felt 23, respectively.
The inclinations of d and B22b are different from each other in the horizontal direction. That is, the oil supply pipe A22d is arranged lower on the rear side R than the front side F of the apparatus, and the oil supply pipe B22b is arranged lower on the front side F than the rear side R of the apparatus.

According to the above configuration, the two oil supply pipes have different inclinations so that the two oil supply pipes are inclined in opposite directions even when the apparatus main body is installed inclined. Therefore, no matter which direction the device is tilted, oil is supplied from one of the oil supply pipes, and oil shortage is eliminated.

For example, as shown in FIG.
When two pipes A22d and B22b having the inclination of the angle a from the horizontal direction in opposite directions are installed, the rear side R of the device is at the maximum angle a with respect to the front side F as shown in FIG. The pipe A22d is horizontal and can supply oil SO even if it is tilted as high as possible. On the other hand, as shown in FIG. 23, when the conventional single pipe is inclined, the oil SO cannot be supplied uniformly if it is inclined.

Therefore, even when the apparatus main body itself is installed at an angle, the oil SO can be uniformly supplied to the fixing roller or the pressure roller, and the inclination margin can be increased.

(Seventh Embodiment) FIG. 17 shows the configuration of oil supply pipes A22f and B22d of this embodiment. The oil supply pipe A22f has a configuration in which the inner diameter of the oil supply pipe A22d is reduced. The inside diameter of the oil supply pipe A22f is smaller than the inside diameter of the oil supply pipe B22d, and the sizes of the inside diameters are different from each other.

With such a configuration, when the oil supply amounts from the pumps A21 and B21 are the same as shown in FIG. 18, the thin oil supply pipe A22f becomes faster than the oil supply pipe B22d at the tip T and the hole H of the oil pipe.
Until the oil SO reaches. Therefore, when the oil supply is needed or required immediately (for example, the first copy), if a thin pipe is used, as shown in FIG. 18, the oil SO arrives quickly at the tip T and the hole H of the pipe. Accordingly, oil unevenness on the front side F and rear side R of the first copying apparatus and oil shortage on the tip end T side far from the oil pump A21 are eliminated.

For multi-sheet passing (two or more sheets), a thin pipe and a thick pipe are used in combination so that two pipes are used, so that the absolute amount of oil supply to the application roller and the like can be increased. Insufficient oil supply during paper passing can be prevented. In this way, an individual oil supply pattern is formed in which the first sheet is a single thin pipe and the multi-sheet passing is a combination of two, so that an optimal oil adjustment can be performed for each sheet passing number.

As described above, the provision of two oil pipes makes it possible to supply various forms of oil than when only one oil pipe is used, and it is possible to supply oil optimally according to individual circumstances. Further, it is useful for a margin UP for the specification of the machine inclination amount. In addition, the arrangement range and size of the holes H can be set to an arbitrary form to further expand the applicable range.

Although the preferred embodiments of the present invention have been described in the above embodiments, the present invention is of course not limited to these embodiments. For example, it goes without saying that the oil SO may be directly supplied to the fixing roller 1 or the pressure rotor 2. In the case of such a configuration, the number of parts is reduced, and the configuration is compact.

[0083]

As described above, according to the first aspect of the present invention, even when the supply pump intermittently supplies the liquid agent, at least the first cylindrical member and the second cylindrical member are connected to each other. And the liquid agent can be supplied to the rotating roller or the supply member at a timing independent of each other, so that the shortage of the liquid agent due to the first cylindrical member caused by the intermittent supply is prevented by the second cylindrical member. It can be supplemented by intermittent supply. Therefore, various liquid agent supply patterns can be freely provided, stabilizing the amount of liquid agent supplied, a margin UP for the specification of the amount of inclination when the apparatus is installed, and uniformizing the liquid agent to the rotating roller and / or the supply member. Can be supplied to

According to the second aspect of the present invention, various liquid agent supply patterns can be realized by arbitrarily selecting a hole arrangement pattern. For example, even if the desired liquid agent cannot be uniformly supplied to the rotating roller and / or the supply member by the first cylindrical member depending on the installation inclination of the apparatus, the second cylindrical member appropriately controls the shortage. Can be supplemented.

When the hole arrangement pattern is provided for each rotary roller area (use area) for supplying the liquid agent, it is possible to supply the liquid agent without waste. Therefore, the excess liquid agent does not stain the inside of the apparatus or the place where the apparatus is installed by dropping from the rotating roller or the supply member, and when the rotating roller is used next time because the rotating roller itself becomes dirty. Contamination can be prevented.

According to the third aspect of the present invention, by providing a supply pump for each cylindrical body, the liquid agent can be surely supplied to the first cylindrical body and the second cylindrical body at independent timing. Can supply.

According to the fourth aspect of the present invention, when a plurality of types of rotary rollers are used, when the first range is used, the liquid agent can be supplied only to that area, and the waste liquid can be supplied. The use of the liquid agent is prevented, and leakage of the liquid agent into and out of the apparatus due to excessive supply is also prevented. When a rotary roller is used with the entire width, the second cylindrical body is used. Therefore, appropriate supply can be made for each application.

According to the fifth aspect of the present invention, when a plurality of types of rotary rollers are used, when the first range is used, the liquid agent can be supplied only to that area, and the waste liquid can be supplied. The use of the liquid agent is prevented, and leakage of the liquid agent into and out of the apparatus due to excessive supply is also prevented. Further, when the rotating roller is used with the entire width, the first and second cylindrical bodies are used. Therefore, appropriate supply can be made for each application.

Since the supply pump supplies the liquid agent by the intermittent operation, a large amount of the liquid agent comes out of the hole near the supply pump, and the uniformity of the liquid agent supply in the longitudinal direction of the rotating roller or the supply member is broken. . In contrast, the sixth embodiment of the present invention
According to the gist of the invention, by supplying the liquid agent separately to the rotating roller or the supply member from the opposite direction, it is possible to prevent the imbalance of the supply of the liquid agent in the longitudinal direction of the rotating roller or the supply member, thereby uniformity. Can be supplied to still,
The liquid agent may be directly supplied to the fixing roller 1 or the pressure rotor 2.

According to the seventh aspect of the present invention, the length of the two cylindrical bodies is shortened, and the difference in the amount of the liquid agent coming out of the holes at both ends becomes substantially proportional to the length of the cylindrical bodies. Can be reduced, and uniform liquid agent supply can be realized.

The place where the apparatus main body is installed is not always horizontal. Therefore, when the apparatus main body is installed at an angle, the cylindrical body may be inclined in the axial direction. At this time, if the distal end side of the cylindrical body is set to be higher than the base end side, the inside of the distal end side cylindrical body will not be sufficiently filled with the release agent. For this reason, there is a problem that the liquid agent is not sufficiently supplied from the hole provided on the tip side. On the other hand, according to the eighth aspect of the present invention, the inclination of the first and second cylindrical bodies is made different, so that the first and second cylindrical bodies are installed even when the apparatus main body is installed at an angle. Since the body is inclined in the opposite direction, it is possible to prevent the supply balance of the liquid agent from being disturbed compared to when the first and second cylindrical bodies are horizontally installed, and the inclination margin is increased. . Accordingly, the liquid agent can be uniformly supplied to the rotating roller or the supply member even when the apparatus main body itself is installed at an angle.

According to the ninth aspect of the present invention, the first and second
The volume of the inside of the cylindrical body is different, and there is a difference in the time when the liquid agent starts to come out from the hole of the cylindrical body. For example, by using a cylindrical body with a small inner diameter, the liquid can be quickly supplied to the rotating roller. Can be. Therefore, supply timings with various variations can be realized.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a schematic configuration diagram of a fixing device Fb according to a first embodiment.

FIG. 2 is a side view illustrating a schematic configuration of a fixing device Fb.

FIG. 3 is an oil supply pipe A2 according to the first embodiment.
It is explanatory drawing of the hole position of the hole H for oil supply provided in 2b and B22b with respect to the application roller 7 and the felt 23 for oil supply, and hole spacing.

FIG. 4 (a) shows the relationship between the oil supply amount and the supply position when oil is supplied only from the pipe A21b.
4B illustrates an oil supply amount and a supply positional relationship when oil is supplied only from the pipe B21b, and FIG. 4C illustrates an oil supply amount and a supply positional relationship when oil is supplied from the pipes A21b and B21b. FIG.

FIG. 5 is a cross-sectional view illustrating a configuration of an oil supply pipe according to a second embodiment.

FIG. 6 (a) shows both oil supply pipes A22b, B
FIG. 6B shows the relationship between the oil amount (vertical axis) and the pipe position (horizontal axis) in the case of oil supply using the oil supply pipe 22c, and FIG. FIG. 6C is an explanatory diagram showing an oil supply amount and a positional relationship when the number of holes H on the inner side R of the apparatus is increased or the hole diameter is increased.

FIG. 7 is a cross-sectional view illustrating a configuration of an oil supply pipe according to a third embodiment.

FIG. 8 is a cross-sectional view illustrating a configuration of an oil supply pipe according to a third embodiment.

FIG. 9 (a) is an oil amount (vertical axis) and pipe position (horizontal axis) in the case of oil supply using only a pipe C22d.
FIG. 9B is an explanatory diagram showing an oil supply amount and a positional relationship using the oil supply pipes C22d and D22d.

FIG. 10 (a) shows the relationship between the oil amount (vertical axis) and the pipe position (horizontal axis) in the case of oil supply using only the pipe A22d, and FIG. 10 (b) shows only the pipe B22d. FIG. 10C shows the relationship between the oil amount (vertical axis) and the pipe position (horizontal axis) in the case of oil supply used, and FIG. 10C shows the oil supply amount and the positional relationship using the oil supply pipes A22d and B22d. FIG.

FIG. 11 is a cross-sectional view illustrating a configuration of an oil supply pipe according to a fourth embodiment.

FIG. 12A shows the relationship between the oil amount (vertical axis) and the pipe position (horizontal axis) in the case of oil supply using only the pipe A22d, and FIG.
FIG. 12C shows the relationship between the oil amount (vertical axis) and the pipe position (horizontal axis) in the case of oil supply using only b, and FIG. It is explanatory drawing which shows a relationship.

FIG. 13 shows an oil supply pipe A2 according to a fifth embodiment.
It is sectional drawing which shows the structure of 2e and B22e.

FIG. 14 (a) is an oil amount (vertical axis) and pipe position (horizontal axis) in the case of oil supply using a conventional pipe.
FIG. 14B shows a pipe A of the present embodiment.
It is explanatory drawing which shows the relationship between the oil amount (vertical axis) and the pipe position (horizontal axis) when using 22e and B22e.

FIG. 15 shows an oil supply pipe A2 according to a sixth embodiment.
It is sectional drawing which shows the structure of 2d and B22b.

FIG. 16 shows an oil supply pipe A2 according to a sixth embodiment.
It is sectional drawing which shows the structure of 2d and B22b.

FIG. 17 shows an oil supply pipe A2 according to a seventh embodiment.
It is sectional drawing which shows the structure of 2f and B22d.

FIG. 18 is an oil supply pipe A2 according to a seventh embodiment.
It is a functional explanatory view of 2f and B22d.

FIG. 19 is a perspective view showing a schematic configuration diagram of a conventional fixing device F.

FIG. 20 is a side view showing a schematic configuration of a conventional fixing device F.

21 (a) is a schematic top view of a conventional fixing device F, and FIG. 21 (b) is a conventional oil supply pipe 22.
It is sectional drawing of the axial direction of b.

FIG. 22 is an operational explanatory diagram showing a difference in the amount of oil coming out of a hole H of a conventional oil supply pipe 22b.

FIG. 23 is an operational explanatory view of a conventional oil supply pipe 22b.

[Explanation of symbols]

Reference Signs List 1 upper fixing roller 2 lower fixing roller 7 oil application roller A21, B21, C21, D21 oil supply pump A22b, A22d, A22e, A22f oil supply pipe B22b, B22c, B22d, B22e oil supply pipe C22d oil supply pipe D22d oil supply pipe 23 Felt for oil supply H hole SO Release agent (silicone oil etc.)

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yasunori Mizuguchi 22-22, Nagaikecho, Abeno-ku, Osaka-shi, Osaka Inside (Sharp) (72) Inventor Atsushi Ide 22-22, Nagaikecho, Abeno-ku, Osaka-shi, Osaka Inside (72) Inventor Kazuhiro Matsuyama 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka Inside Sharp Corporation (72) Inventor Masahiko Fujita 22-22 Nagaike-cho, Abeno-ku, Osaka-shi, Osaka Sharp Corporation F Terms (reference) 2H033 AA09 BA42 BA43 BA44 BA45 BA46 BB01 BB28 4F040 AA05 AB08 BA12 BA14 CB21 CB33 CB36

Claims (9)

[Claims] 1. A rotating roller having a predetermined length and rotating around a longitudinal axis thereof, and / or a supply member provided in parallel with the rotating roller and supplying a liquid agent to the rotating roller. A cylindrical body having a predetermined length provided at an upper portion and having a plurality of holes in an axial direction of an upper surface, and a supply pump for intermittently supplying a liquid agent to the cylindrical body, comprising: The liquid agent supply device, which supplies the liquid agent supplied to the cylindrical body to the surface of the rotating roller through a plurality of holes to prevent a sheet moving on the surface of the rotating roller from being fixed to the rotating roller, The body has a first tubular body and a second tubular body,
A liquid agent supply device, wherein the first cylindrical member and the second cylindrical member can supply a liquid agent to a rotating roller or a supply member at a timing independent of each other. 2. The liquid agent supply device according to claim 1, wherein the first cylindrical body and the second cylindrical body have different hole arrangement patterns. 3. The method according to claim 1, wherein the supply pump includes a first cylindrical body and a second cylindrical body.
The liquid agent supply device according to claim 1, wherein the liquid agent supply device is provided for each of the cylindrical bodies. 4. A hole of the first cylindrical body is formed in a first direction of a rotating roller or a supply member in a longitudinal direction of the first cylindrical body.
The hole provided in the second cylindrical body is provided in a second range corresponding to a length in a longitudinal direction of the rotating roller or the supply member. Liquid agent supply device. 5. The first cylindrical body has a hole in a first direction of a rotating roller or a supply member in a longitudinal direction of the first cylindrical body.
The hole of the second cylindrical body is provided at least in a second range other than the first range of the rotating roller or the supply member. Liquid agent supply device. 6. The supply direction of the liquid agent to the first tubular body and the second tubular body is substantially opposite to each other with respect to the longitudinal direction of the rotating roller or the supply member. Item 2. A liquid agent supply device according to Item 1. 7. The first cylindrical body is provided with a supply port at a first end side of a rotary roller or a supply member, and has a length up to a substantially central portion in a longitudinal direction of the rotary roller or the supply member. The second cylindrical body has a supply port on a second end side of the rotating roller or the supply member, and has a length up to a substantially central portion in a longitudinal direction of the rotation roller or the supply member. The liquid agent supply device according to claim 6, wherein: 8. The liquid agent supply device according to claim 6, wherein the first cylindrical body and / or the second cylindrical body are arranged such that a front end side is lower than a base end side. 9. The liquid agent supply device according to claim 1, wherein the first and second cylindrical bodies have different inner diameters.