JP3866613B2 - Fixing roll processing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fixing roll processing apparatus used in an electrophotographic copying apparatus such as a printer. More specifically, the present invention relates to a processing apparatus that burnishes the surface of a fixing roll with a roller.
[0002]
[Prior art]
Conventionally, various fixing rolls used in electrophotographic copying machines and the like with improved roll forms have been proposed in consideration of peeling of paper to be copied. Such a fixing roll is manufactured as follows, for example. Cutting and grinding are performed on the surface of the cylindrical body made of metal. At this stage, the cylindrical body is processed so that the outer diameters at both ends are slightly larger than the central part, and the cylindrical body is slightly recessed over the entire length of the cylindrical body, forming a so-called drum shape. In the use stage, the dent is eliminated and flattened.
[0003]
In the processing stage, the surface of the cylindrical body is subjected to processing such as sandblasting and etching to make the surface somewhat rough. Next, a primer mainly composed of a fluororesin is applied to form a primer layer. Subsequently, a fluororesin paint is applied to the primer layer. In applying this fluororesin paint, various treatments have been proposed, for example, by adding additives. These are measures for facilitating separation of the transfer paper in contact with the fixing roll.
[0004]
On the other hand, the surface of the cylindrical body is also made as smooth as possible. For example, a process of smoothing the surface of the release layer with a roll after firing has also been proposed. Recently, with the aim of shortening the rise time to the fixing temperature and lowering power consumption, a polytetrafluoroethylene (trade name registered as “Teflon”) layer (hereinafter referred to as “Teflon layer”) is sequentially formed through a heat insulating layer. What has been proposed is proposed. This Teflon layer has a good toner releasability, and is covered with a Teflon layer or the like to prevent peeling of the electrode portion and has a good heat resistance. The embodiment of the present invention is directed to a fixing roll coated with Teflon.
[0005]
On the other hand, burnishing is often applied to surface processing of magnetic disks. In order to prevent the head from crashing due to contact between the magnetic disk and the magnetic head, burnishing is performed to remove protrusions generated on the surface of the magnetic disk. This method is to remove the burnishing head by colliding with the protrusions of the magnetic disk, but various devices such as pressing the burnishing head with a spring or providing a heating mechanism have been made. An effective method for burnishing the fixing roll has not been proposed.
[0006]
[Problems to be solved by the invention]
As described above, various methods have been proposed for the current fixing rolls, but many of them are particularly related to the surface material and the configuration thereof. Since the surface of the fixing roll is not necessarily smooth during the processing, it must finally be smooth. If it is not smooth, it adversely affects the transfer function such as copying. In the process of applying Teflon, since it is not necessarily applied uniformly, a finishing process is required along the shape of the fixing roll.
[0007]
At present, there is no efficient and reliable finishing device, which necessitates inefficient machining. For this reason, there is a demand for an effective and highly productive processing apparatus. The present invention was developed based on such a technical background, and an object of the present invention is to provide an apparatus that smoothly processes the surface of the fixing roll by applying burnishing to the fixing roll. It is in. Another object of the present invention is to provide an apparatus for processing at a low cost with a simple configuration.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the fixing roll processing apparatus of the present invention 1 comprises:
A processing device for finishing the surface of the fixing roll (7),
A base (2) on which the fixing roll (7) is installed;
A plurality of rollers (19, 23) rotatably provided on the surface of the fixing roll (7);
The roller (19, 23) is provided on the base (2), and the roller (19, 23) is provided in the inner diameter portion, and rotates along the circumference of the fixing roll (7) via the roller (19, 23) . And an eccentric body (12) that moves relative to the fixing roll (7) in the axial direction of the fixing roll (7) ;
Rotating device for rotating said fixing roll (7) above while rotating the rollers (19, 23) and (11, 14, 21),
A moving device (4) that relatively moves the eccentric body (12) or the fixing roll (7) in the axial direction of the fixing roll (7) ;
Said roller (19, 23) rotating the fixing roll (7) above, while relatively moving said roller (19, 23) in the axial direction together with the rotation of the eccentric body (12), said rollers (19, by pressing on the surface of the fixing roll 23) (7), characterized by processing the surface of the fixing roll (7).
[0009]
The fixing roll processing apparatus according to the second aspect of the present invention is the processing apparatus according to the first aspect, wherein the rotating device (11, 14, 21) includes a support base (3) supported by the base (2) and a support base (3). 3) a rotating body (11) rotatably supported by the rotating body (11), a rotation driving device (14) provided on the base (2) for rotating the rotating body (11), and the rotating body (11). And a rotation transmitting member (21) for rotating the rollers (19, 23).
The rotating body is through the rotation transmission member which transmits the rotation to the roller. Further, the rotation drive device may be a continuously variable transmission, which continuously changes the rotation from the motor and drives the rotating body via a pulley and a V-belt.
[0010]
Processing apparatus of the fixing roll of the present invention 3, in the present invention 1, wherein the mobile device (4) is a cylinder device provided on the base (2) (4), said fixing roll (7) characterized in that it is a device that moves in the axial direction.
The moving device (4) may move the fixing roll in the axial direction via a support to the cylinder rod of the cylinder device. Further, the support may be moved to the guide bar.
[0011]
Processing apparatus of the fixing roll of the present invention 4, in the present invention 1, the eccentric body (12) is a two eccentrics the eccentric portion is provided relative to the radial direction (12a, 12b), the It is the structure provided in parallel with the axial direction.
[0012]
The fixing roll processing apparatus according to the fifth aspect of the present invention is configured such that in the second aspect of the present invention, the rollers (19, 23) are held by a holding member (20), and the holding member (20) is the rotating body. (11) It is the structure which rotates in response to rotation transmission. The holding member holds the plurality of the rollers, and forms a part of the rotation transmitting member.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing the entire fixing roll processing apparatus 1 of the present invention. FIG. 2 is a plan view thereof. The main part of the processing apparatus is provided in the central part on the base 2. The base 2 has a frame structure and is configured by welding an angle material. The base 2 may be made of a casting or the like. A support base 3 is provided at the center of the base 2 and supports a rotating body described later.
[0014]
A cylinder 4 is attached to both end portions 2 a and 2 b of the base 2. Further, two guide bars 5 are provided on the base 2 in parallel. The guide bar 5 is fixed to both end portions 2 a and 2 b of the base 2. Two supports 6 are guided across the two guide bars 5. A fixing roll 7 is sandwiched between the two supports 6 and supported via a support shaft 8. A plurality of fixing rolls 7 are attached to the support shaft 8. Accordingly, a plurality of fixing rolls 7 can be processed simultaneously.
[0015]
The end of the piston rod 9 of the cylinder 4 is attached to the support 6, and the fixing roll 7 reciprocates in the axial direction along the guide bar 5 by the forward and backward movement of the cylinder 4. Two cylinders 4 are attached to the base 2 end portions 2a and 2b, and one cylinder 4a is set so that its pressing force is weaker than the other cylinder 4b. In the case of the return process, it is not necessary to supply pressure oil to the other cylinder.
[0016]
The main device portion of the present invention is fixed to the central portion of the base 2 and is configured in a state where a fixing roll sandwiched between two supports 6 is passed through the support 3. FIG. 3 shows details of this portion. 4 is a cross-sectional view taken along the line AA in FIG. A rotating body 11 that is rotatably supported by a ball bearing 10 is provided on a support base 3 that is fixed to the base 2. The rotating body 11 is composed of two rotating bodies 11a and 11b. The two rotating bodies 11a and 11b incorporate an eccentric body 12 and are integrated by a bolt 13.
[0017]
One rotating body 11a is provided with a V-groove 11c to form a pulley, and a V-belt 14 is hung on it. A continuously variable transmission 15 is attached to the lower part of the base 2, and a V belt 14 is hung on a pulley 17 provided on a rotating shaft 16 of the continuously variable transmission 15. This is transmitted to the rotating body 11 via the belt 14. Although details of the continuously variable transmission are not shown, this is a known device that can change the rotation speed by changing the width of the opposite pulley. The rotating body 11 is rotatable relative to the fixing roll 7 with a slight gap from the fixing roll 7 provided through the rotating body 11. Since the fixing roll 7 moves in the axial direction by the operation of the cylinder, the rotating body 11 can move relative to the fixing roll 7 also in the axial direction.
[0018]
Next, a method for burnishing the fixing roll 7 will be described. The plate-like eccentric body 12 built in the rotating body 11 is provided with a part of the plate eccentric in the radial direction with respect to the central axis of the fixing roll 7, and is composed of two eccentric bodies 12a and 12b. ing. The two eccentric bodies 12a and 12b are attached in a symmetrical arrangement around the axis of the fixing roll 7 as shown in FIG. The two eccentric bodies 12a and 12b are regulated by the pin body 18 with each other and are in a state where they can be slightly shifted from each other.
[0019]
A plurality of needle-shaped rollers 19 are fitted between the eccentric body 12 and the fixing roll 7, and the eccentric body 12 and the fixing roll 7 can be rotated via the roller 19. The roller 19 is held by a holding member 20, and the roller 19 itself directly contacts the inner diameter portion of the eccentric body 12 and the surface of the fixing roll 7. On the other hand, an engaging member 21 is provided at a position near the fixing roll 7 of the rotating body 11, and the engaging member 21 is engaged with the holding member 20.
[0020]
Accordingly, the rotation of the rotating body 11 is transmitted to the holding member 20 through the engaging member 21, and the roller 19 rotates while being held by the holding member 20 as the holding member 20 rotates. It rotates in contact with the body 12 and the fixing roll 7. FIG. 5 is a diagram schematically showing a state of deviation between the two eccentric bodies 12a and 12b. Since there is a slight gap between the eccentric body 12, the roller 19, and the fixing roll 7, when the eccentric body 12 rotates, the eccentric portion is moved radially outward by centrifugal force.
[0021]
When one eccentric body 12a is displaced outward as indicated by an arrow in the figure, the other eccentric body 12b is shifted in the opposite direction as shown in the figure. For this reason, the roller 19 is slightly inclined, and the eccentric body 12 and the fixing roll 7 are brought into a point contact state at the end 19a of the roller 19, and the roller 19 rotates and revolves. In such a state, a part of the roller 19 rotates so as to rub the fixing roll 7 portion indicated by X part in the drawing.
[0022]
The roller 19 is a high-hardness member, and the surface of the fixing roll 7 is coated with soft Teflon. For this reason, the roller 19 presses the Teflon layer as it rotates and crushes the convex portions on the surface to make it smooth. That is, burnishing is performed. Vanishing is, in short, a process that rubs strongly to smooth the surface or gloss. Although it does not rotate itself, the fixing roll 7 in the relative rotation state is moved in the axial direction, so that the burnishing process can be performed evenly along the length of the fixing roll 7.
[0023]
Only the centrifugal force accompanying the eccentricity of the eccentric body 12 is applied to the surface of the fixing roll 7, and no forced external force is applied. Therefore, the surface of the fixing roll 7 is not scratched and damaged. In this manner, the burnishing is performed while following the surface shape of the fixing roll 7 whose entire length is the drum shape. By performing such burnishing, the fixing roll 7 is finished by correcting the distortion of the fixing roll 7 and leveling the convex portions.
[0024]
FIG. 6 is a diagram schematically showing a contact state between the roller 19 and the fixing roll 7 in the case of a single eccentric body. In this case, since the eccentric body 22 is moved toward the one side in the radial direction by centrifugal force as indicated by an arrow, the roller 19 is in a state where a part of the roller 19 is pressed to the fixing roll 7 side as shown in the figure. In this case, the roller 19 makes contact per line. Also in this case, as described above, as the roller 19 rotates, the protrusion of the fixing roll 7 is removed, or burnishing is performed to correct the distortion. In the case of this embodiment, it is effective that the width of the roller 19 is narrow.
[0025]
FIG. 7 is an example in which the roller 23 is provided independently for each of the eccentric bodies 24a and 24b in the modification of FIG. Engaging members 21 are provided on the two rotating bodies 11a and 11b, respectively, and the engaging members 21 transmit the transmission force of the rotating bodies to the holding members of the rollers 23 provided on the eccentric bodies 24a and 24b. In this case as well, each roller 23 is displaced in the eccentric direction as indicated by the arrow due to the centrifugal force accompanying the eccentricity. In this case, both contact forms of the roller 23 are line contact. Double correction processing is performed by moving the roller 23 or the fixing roll 7 in the axial direction. In this case, it is expected to increase the smoothness.
[0026]
8 to 10 show another embodiment of the processing apparatus configuration. In this embodiment, a guide for the guide bar 5 is provided on the support base 25, the fixing roll 7 is held on the guide bar 5 side, and the guide bar 5 is moved. As shown in FIG. 10, a guide portion 27 is provided for allowing the guide bar 5 to pass through a support base 25 that is sandwiched between the rotating body 11 and fixed to the base 26. The guide portion 27 has a bush type configuration in which the guide bar 5 is directly received by the support base 25. The bush is an oil-less type guide body that makes the guide smooth.
[0027]
The guide bar 5 supports the guide bar 5 so as to be movable in the axial direction. As described above, the guide bar 5 is provided with supports 6 at both ends, and is fixed to the guide bar 5. The support 6 is coupled to the piston rod 9 of the cylinder 4, and the guide bar 5 is movable integrally with the piston rod 9 in the axial direction. The driving mode of the rotating body is the same as described above. In this configuration, since the guide bar 5 is moved by one cylinder and the fixing roll 7 is moved, the configuration of the base 26 is simplified, the base 26 becomes smaller, and the range of the cylinder support portion and the support base portion is reduced. It becomes the size of. The occupation area of the processing apparatus can be reduced.
[0028]
Although the embodiment of the present invention has been described above, it goes without saying that the specific configuration of the present invention is not limited to this embodiment. In this embodiment, the base has a frame configuration, but may have a casting configuration. The guide device may be provided with a guide portion on the base instead of the guide bar, or a commercially available guide rail may be purchased and attached.
[0029]
【The invention's effect】
As described above, since the surface of the fixing roll is corrected by using the centrifugal force of the eccentric body, the configuration is simplified and a low-cost processing apparatus is obtained. The roller burnishing is performed by rotating and repetitively moving in the axial direction, so that reliable and uniform smoothing can be performed.
[Brief description of the drawings]
FIG. 1 is a front view showing an entire fixing roll processing apparatus according to the present invention.
FIG. 2 is a plan view showing the entire fixing roll processing apparatus of the present invention.
FIG. 3 is a partial cross-sectional view showing a processed portion of the fixing roll.
4 is a cross-sectional view taken along the line AA in FIG. 3. FIG.
FIG. 5 is an explanatory diagram schematically showing a state of a fixing roll pressed by a roller.
FIG. 6 is an explanatory diagram schematically showing a relationship between a roller and a fixing roll in the case of a single eccentric body.
FIG. 7 is an explanatory diagram schematically showing a relationship when the fixing roll is pressed by two rollers.
FIG. 8 is an overall front view of a processing apparatus showing another embodiment.
FIG. 9 is an overall plan view of a processing apparatus showing another embodiment.
FIG. 10 is a partial view showing a guide unit according to another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Processing apparatus 2 ... Base 3 ... Support stand 4 ... Cylinder 5 ... Guide bar 7 ... Fixing roll 9 ... Piston rod 11 ... Rotating body 12 ... Eccentric body 19 ... Roller

Claims (5)

A processing device for finishing the surface of the fixing roll (7),
A base (2) on which the fixing roll (7) is installed;
A plurality of rollers (19, 23) rotatably provided on the surface of the fixing roll (7);
The roller (19, 23) is provided on the base (2), and the roller (19, 23) is provided in the inner diameter portion, and rotates along the circumference of the fixing roll (7) via the roller (19, 23) . And an eccentric body (12) that moves relative to the fixing roll (7) in the axial direction of the fixing roll (7) ;
Rotating device for rotating said fixing roll (7) above while rotating the rollers (19, 23) and (11, 14, 21),
A moving device (4) that relatively moves the eccentric body (12) or the fixing roll (7) in the axial direction of the fixing roll (7) ;
Said roller (19, 23) rotating the fixing roll (7) above, while relatively moving said roller (19, 23) in the axial direction together with the rotation of the eccentric body (12), said rollers (19, 23. The fixing roll processing apparatus , wherein the surface of the fixing roll (7) is processed by pressing 23) against the surface of the fixing roll (7). In the fixing roll processing apparatus according to claim 1 ,
The rotating device (11, 14, 21) includes a support base (3) supported by the base (2), a rotating body (11) rotatably supported by the support base (3), A rotation drive device (14) provided on the base (2) for rotating the rotation body (11), and a rotation transmission member (21) provided on the rotation body (11) for rotating the rollers (19, 23). And a fixing roll processing apparatus. In the fixing roll processing apparatus according to claim 1,
The mobile device (4) is a cylinder device provided on the base (2) (4), the fixing roll, characterized in that said fixing roll (7) is a device that moves in the axial direction Processing equipment. In the fixing roll processing apparatus according to claim 1,
The eccentric member (12), characterized in that the eccentric portion is a two eccentrics arranged relative to the radial direction (12a, 12b), has a structure which is provided in parallel to the axial direction Fixing roll processing equipment. In the fixing roll processing apparatus according to claim 2 ,
The rollers (19, 23) are configured to be held by a holding member (20), and the holding member (20) is configured to rotate by receiving the rotation transmission of the rotating body (11). Fixing roll processing device.

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