JPS63201682A - Pressure fixing device - Google Patents

Abstract

PURPOSE:To surely fix a material to be fixed to recording paper and to reduce the size and cost of a device by moving a pressing member for fixing which is pressurized under a low pressure to the recording paper back and forth in the direction intersecting with the feed direction of the recording paper. CONSTITUTION:This pressure fixing device 1 is constituted of the pressing member 29 for fixing which is movably supported on the recording paper 5 fed on a supporting member 3, an elastic member 27 which energizes the pressing member 29 to the recording paper 5 and driving members 21, 35, 39 for moving the member 29 back and forth in an arc shape in the direction intersecting with the feed direction of the paper 5. The member 29 which is moved back and forth in the arc shape by the members 21, 35, 39 is, therefore, brought into pressurized contact with the paper 5 by the pressure corresponding to the elastic force of the member 27, by which the material to be fixed is fixed. The size and cost of the device are thereby reduced.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention is applicable to electronic copying machines, printing devices, facsimile machines, etc., in which toner developed on recording paper is fixed under pressure, and ink of a desired color is sealed. The present invention relates to a pressure fixing device that fixes ink to recording paper by destroying uncured microcapsules with pressure.

[Prior Art] For example, in a pressure fixing device disclosed in Japanese Patent Application Laid-Open No. 57-185067, a fixing roll is pressed with a predetermined pressure against the outer peripheral surface of a support roll rotatably supported by a frame. The recording paper, on which the toner is attached according to the electrostatic latent image or the magnetic latent image, is brought into pressure contact over almost the entire axial direction and is passed between the support roll and the fixing roll, so that the toner is fixed to the recording paper by pressure. has been done.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional pressure fixing device, since the pressure contact area of the fixing roll against the outer peripheral surface of the support [1-ru] that supports the recording sheet becomes large, the axis line In order to obtain uniform pressure over almost the entire direction, the fuser roll had to be applied with extremely high pressure against the support roll. For this reason, it is necessary to increase the shaft diameters of the support roll and fixing roll and to form a strong frame to withstand the above pressure (q), which increases the number of parts and increases the size and cost of the device. There is a problem of increasing

[Object of the Invention] In view of the above-mentioned conventional drawbacks, it is an object of the present invention to provide a method for reciprocating a fixing pressing member that is pressed against the recording paper at a low pressure in a direction intersecting the feeding direction of the recording paper. It is an object of the present invention to provide a pressure fixing device that can reliably fix a fixing material by doing so, and can reduce the size and cost of the device.

[Means for Solving the Problems] Therefore, the present invention provides a fixing pressing member movably supported on recording paper fed on a support member, and a fixing pressing member movably supported on recording paper fed on a support member, and an elastic member that biases the member;
A pressure fixing device is constituted by a driving member for reciprocating the fixing pressing member in an arc shape in a direction intersecting the feeding direction of the recording paper.

[Operation of the Invention 1] Since the present invention is constructed as described above, the fixing pressing member, which is reciprocated in an arcuate manner by the driving member, is pressed against the recording paper by a pressure corresponding to the elastic force of the elastic member. A fixing agent is fixed.

[Example] Hereinafter, using the present invention as a fixing agent, yellow, magenta, and cyan inks were applied to 11 people's microphones. An embodiment of a pressure fixing device that performs multi-color recording by mixing inks in fixed volumes on recording paper will be described with reference to the drawings.

FIG. 1 is a perspective view schematically showing a pressure fixing device using a capsule sheet according to the present invention, and FIG. 2 is a longitudinal cross-sectional view of FIG. 1, in which a frame 3 of the pressure fixing device 1 is fed. A support surface 7 is configured as a support member that supports the recording paper 5, and the feeding side of the frame 3 has an axis in a direction perpendicular to the feeding direction of the recording paper 5, and has a width of the recording paper 5. A pair of upper and lower feed rolls 9 having the above axis line quality, and having an axis parallel to the feed roll 9 on the feed side,
Similarly, a pair of upper and lower delivery rolls 11 each having an axial length one length longer than the width of the recording paper 5 are rotatably supported.

A sheet roll 15 on which a capsule sheet 13 having a width approximately equal to the width of the recording paper 5 is wound is rotatably supported above the feed side of the frame 3, and a take-up roll 17 is rotatably supported above the feed side. The capsule sheet 13 wound around the sheet roll 15 passes through the feed roll 9 and the feed roll 11, and is then wound onto the take-up roll 17. As a result, the capsule sheet 13 is fitted onto the upper surface of the recording paper 5 fed onto the support plate 7. On the capsule sheet 13 paper (not shown), 14 microcapsules (not shown) each containing yellow, magenta, and cyan inks as a fixing agent are applied almost uniformly. There is. The microcapsules in which each color of ink is encapsulated are then irradiated with ultraviolet rays or visible light of the corresponding wavelength from an exposure device (not shown) placed between the feed roll 9 and the sheet roll 15. Then, it hardens and is prevented from being destroyed by pressure, which will be described later. An electric motor (not shown) is connected to the feed roll 9, the feed roll 11, and the take-up roll 17, and the feed roll 9, the feed roll 11, and the take-up roll are driven by the electric motor. 17 is rotated fiIIff. As a result, the superimposed recording paper 5 and capsule sheet 13 are fed in the direction of the solid line arrow shown in FIG.

A circular support frame 1 is provided at the intermediate portion on both sides of the frame 3.
A support shaft 19 having an axis in the direction toward the support surface 7 is supported in the center of the support frame 18 so as to be slidable in the axial direction and rotatable. A swing lever 21, which constitutes a part of the drive member, is fixed to the lower end of the support shaft 19. A support arm 23 is formed on one side of the swing lever 21. The support arm 23 has a truncated conical shaft and has a large diameter base end and a small diameter tip end. Further, a groove portion 25 extending in the axial direction is formed in the other side of the swing lever 21. A support ring 20 is rotatably supported at the lower end of the support shaft 19 via a ball bearing 24, and a compression spring 27 as an elastic member is installed between the lower surface of the support frame 18 and the support ring 20. , is urged downward along the axis by the elastic force of the compression spring 27.

A fixing roll 29 serving as a pressing member for fixing is supported at the tip of the support arm 23 so as to be rotatable around an axis via a ball bearing 31.

This fixing roll 29 is made of a metal H having wear resistance and hardness.
The capsule sheet 13 is made of material, ceramics, etc.
The outer circumferential surface thereof has a drum-shaped cross section that bulges out from both sides in the radial direction so that the area of pressure contact is small. The constant % i[]-ru 29 is pressed against the capsule sheet 13 under a required load (approximately 20 to 40 ka) depending on the elastic force of the compression spring 27.

A long hole 33 facing in the delivery direction is formed on the delivery side of the support frame 18. On the support frame 18, a rotating shaft 35a is inserted through the elongated hole 33, and an electric motor 35, which constitutes a part of the driving member, is movable according to the width of the elongated hole 33 with respect to the delivery side. installed on. A disk 37 is attached to the rotating shaft 35a, and the disk 37
An eccentric @ 39 constituting a part of the drive member is dammed on the outer circumferential side of the groove 25 so as to engage with the groove 25 . As a result, when the disk 37 is rotated in a desired direction by the drive of the electric motor 35, the eccentric shaft 3
9, the support arm 23 of the swing lever 21
pivots around the support shaft 19 in a direction intersecting the feeding direction over almost the entire width of the recording paper 5 in accordance with the distances between the support shaft 19 and the rotating shaft 35a and between the rotating shaft 35a and the eccentric shaft 39. be done.

Next, the operation of the pressure chamber NVTIA 1 configured as described above will be explained with reference to FIG. 3, which shows the swinging state of the swinging lever 21, and FIG. 4, which shows the B-contact state with respect to the capsule sheet 13.

When the recording paper 5 passes a detector (not shown) disposed on the upper side of the feed roll 9 in the feeding direction, it is moved in the desired direction by an electric motor 35 driven based on a detection signal from the detector. The eccentric shaft 39 that rotates to is in sliding contact with the groove portion 25,
The swing lever 21 is supported and swings back and forth around +1119. As a result, the fixing roll 2
The capsule sheet 9 is rolled with respect to the capsule sheet 13 while rocking along a rocking locus that intersects with the feeding direction. At this time, the fixing roll 29 is pressed against the capsule sheet 13 with a required pressure depending on the elastic force of the compression spring 27. Note that when the recording sheets 5 are not superimposed, all the microcapsules coated on the capsule sheet 13 are hardened by irradiation with ultraviolet rays or visible light by the exposure device, so they are pressed against each other as they are oscillated. The microcapsules are prevented from being destroyed by the fixing roll 29, which is transferred at the same time.

In the above state, the recording sheets are superimposed so that the leading edge of the recording M5 and the leading edge of the Cubhill sheet 13, on which latent images corresponding to the figures, characters, and colors of 5 sheets of recording paper have been formed by the exposure device, almost coincide with each other. 5 and the capsule sheet 13 are rotated by the feed roll 9 and the take-up roll 17, so that the supporting plate 7
When fed in the direction shown by the solid line arrow in FIG. 3 while being supported above, the fixed 40-ru 29 swings around the support shaft 19 and releases the capsule sheet 13 on which the recording paper 5 is superimposed.
The recording paper 5 is transferred in a direction intersecting the feeding direction of the recording paper 5 while being pressed against the upper surface with a pressure corresponding to the elastic force of the compression spring 27. - The uncured microcapsules are destroyed by the transfer of the recording stone roll 29, and the encapsulated inks of each color are mixed and fixed on the recording paper 5, thereby recording figures and characters in the desired colors on the recording paper 5. Ru. At this time, the vertical cross-sectional shape of the fixing roll 29 is formed into a drum shape, and the area of pressure contact with the capsule sheet 13 becomes minute, so that the pressure according to the elastic force of the compression spring 27 is concentrated on the pressure contact surface with the capsule sheet 13. Let's uncured microphone 0
Capsules can be destroyed reliably. Note that even when the fixing roll 29 is in pressure contact with the stacked recording paper 5 and capsule sheet 13, the rotation of the feed roll 9 and the take-up roll 17 is maintained; Fixing roll 29 L
[When the feeding is temporarily stopped during entertainment and the pressure contact of the fixing roll 29 is released, the recording paper 5 and the capsule sheet 1 are rotated by the feeding roll 9 and the take-up roll 17.
3 is again fed at a feed rate m corresponding to the pressure width of the fixing roll 29.

Then, by the above operation, JZ fjj is spread over the capsule sheet 13 in a direction perpendicular to the feeding direction of the recording paper 5
When the recording paper 5 on which the uncured microcapsules are destroyed and the ink is mixed and fixed by the fixing roll 29 that rotates while rotating is fed to the delivery roll 11, the recording paper 5 is transferred to the delivery roll 11. As it rotates, it is sent out of the pressure chamber@device 1 while being held. Further, the capsule sheet 13 in which the uncured microcapsules are destroyed is wound up as the winding roll 17 rotates.

Note that when the width of the recording paper 5 is changed, the electric motor 3 is moved relative to the support frame 18 according to the width of the recording paper 5.
By changing the mounting position of 5, constant 'n roll 29
can be oscillated across the entire width of the recording paper.

In this way, in this embodiment, the capsule sheet 13 stacked on the recording paper 5 is moved one time in the direction intersecting the feeding direction.
m + J] by rolling the fixing roll 29 while pressing against it with a pressure according to the elastic force of the compression spring 27, thereby destroying the uncured microcab building coated on the capsule sheet 13 and enclosing it. The ink can be fixed on the recording paper.

In the above explanation, microcapsules filled with A10-, magenta, and cyan inks are applied according to figures and characters of the required colors to be recorded, and the required colors are recorded by an exposure device. The uncured microcapsules are destroyed by pressure contact with the fixing roll 29, and the encapsulated ink is mixed and fixed on the recording paper 5 to form a multilayer film. Although it is configured to record in color, a rotating fixing roll is transferred while applying pressure to the recording paper to which developed toner is adhered according to an electrostatic or magnetic latent image, thereby transferring the toner onto the recording paper. It may be a pressure chamber 11 device for fixing.

Further, in the above description, the support # is supported by the elastic force of the compression spring 27.
Although the configuration was such that the fixing roll 29 is brought into contact with the capsule sheet 13 on which the recording paper 5 is superimposed with a pressure corresponding to the elastic force by urging the A1 downwardly on the axis, the support arm 23 of this embodiment is The support arm 2 is formed of a spring member, and the support arm 2 is
The fixing roll 29 may be brought into pressure contact with the capsule sheet 13 by elastically deforming the fixing roll 3 in advance.

[Effect of the Invention 1] Therefore, the present invention reliably fixes the fixing material by reciprocating the fixing pressing member, which is pressed against the recording paper at a low pressure, in a direction intersecting the feeding direction of the recording paper. It is possible to provide a pressure fixing device capable of fixing images to a wide range of images, thereby making the device more popular and lower in cost.

[Brief explanation of the drawing]

FIG. 1 is a perspective view schematically showing a pressure fixing device using a capsule sheet according to the present invention, FIG. 2 is a central vertical sectional view of FIG. 1, and FIGS. 3 and 4 are explanatory views showing a fishing device. It is. In the figure, 1 is a pressure fixing device, 5 is a recording paper, 13 is a capsule sheet provided with a fixing agent, 21 is a lever that constitutes a part of a driving member, 27 is a compression spring as an elastic member, 2 is a fixing roll as a pressing member for fixing, and 35 is an electric roller that constitutes a part of a driving member. The e-motor 39 is an eccentric shaft that constitutes a part of the drive member.

Claims (1)

[Claims] (1) In a pressure fixing device for recording by fixing a fixing agent under pressure to a recording paper supported by a support member, the fixing agent is movably supported on the recording paper transferred on the support member. a fixing pressing member; an elastic member for urging the fixing pressing member against the recording paper; and a mechanism for reciprocating the fixing pressing member in an arc shape in a direction intersecting the feeding direction of the recording paper. A pressure fixing device comprising: a driving member; and a pressure fixing device.