JP3586130B2 - Image transfer device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an image transfer apparatus that heats and transfers an image formed on an image sheet to an image receiving sheet.
[0002]
[Prior art]
In the printing industry, a printing device dedicated to proofreading is used in order to perform printing for proofing without spending time and money before printing a large amount using a printing machine capable of high-speed and mass printing. In this printing apparatus for proofreading, it is desired to output an image as close as possible to a finished image. There are several types of such devices, but transfer-type image recording systems exist for forming fine images despite their relatively small size. In such a transfer-type image recording system, first, an image is once formed on a film-like image sheet by an image recording device, and then the image on the image sheet is formed by an image transfer device separate from the image recording device. Is transferred to the actual paper to record an image.
[0003]
In this image transfer apparatus, the image formed on the image sheet is passed through a pair of transfer rollers whose surface temperature is maintained at a high temperature in a state in which the image sheet and the paper are superimposed, so that the image formed on the paper is Is transferred to
[0004]
[Problems to be solved by the invention]
However, in such a heat transfer, there is a problem that "wrinkles" are generated on the image sheet or the actual paper depending on the heating state. When "wrinkles" occur, the transferred image is greatly affected, and a precise image cannot be obtained.
[0005]
In view of the above problems, an object of the present invention is to provide an image transfer device that heat-transfers an image formed on an image sheet to an image receiving sheet and that prevents occurrence of “wrinkles”.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the image transfer apparatus according to claim 1, wherein an image formed on the image sheet is received by heating a laminate in a state where an image sheet and an image receiving sheet are overlaid. In an image transfer device for transferring to a sheet, a pair of transfer rollers arranged in parallel with each other, heated by a predetermined heating source, and capable of changing a distance between them to switch between a close state and a separated state. Having a plate-like member extending along the axial direction of the pair of transfer rollers, the plate-like member is capable of moving forward and backward in an interaction area of the pair of transfer rollers, and one of the transfer rollers and the plate Sandwiching means capable of sandwiching the tip of the laminate between the plate-shaped member and the plate-shaped member, wherein the plate-shaped member is inserted into the interaction area in the separated state. At the same time as sandwiching the leading end of the stacked body with the one transfer roller, or thereafter, bringing the pair of transfer rollers close to each other, and synchronizing with the rotation of the pair of transfer rollers, the leading end of the stacked body. The plate member is discharged from the interaction area of the pair of transfer rollers together with the portion.
[0007]
The image transfer device according to claim 2 is the image transfer device according to claim 1, wherein the plate-shaped member is discharged from the interaction area between the pair of transfer rollers by a rotational force of the pair of transfer rollers. It is characterized by being performed.
[0008]
The image transfer device according to claim 3, wherein in the image transfer device according to claim 1 or 2, the stacked body that has passed through the interaction area of the pair of transfer rollers is circled by the one transfer roller. It is characterized by further comprising a guide mechanism for guiding along a part of the peripheral curved surface.
[0009]
The image transfer device according to claim 4 is the image transfer device according to claim 3, wherein the guide mechanism includes a sheet-shaped member stretched along a part of a circumferential curved surface of the one transfer roller. And a sheet supporting structure for supporting the sheet-like member, wherein the laminate is guided and passes between the sheet-like member and the one transfer roller.
[0010]
An image transfer device according to a fifth aspect is the image transfer device according to the fourth aspect, wherein the sheet-shaped member is detachably attached to the sheet support structure.
[0011]
According to a sixth aspect of the present invention, in the image transfer apparatus according to any one of the third to fifth aspects, the sandwiching unit is also used as a part of the guide mechanism. .
[0012]
An image transfer device according to a seventh aspect is the image transfer device according to any one of the first to sixth aspects, wherein a position of the one transfer roller is displaced using a cam. The roller is switched between a close state and a separated state, and the cam has a cam curve having a section where the displacement is constant in the close state of the pair of transfer rollers.
[0013]
An image transfer device according to claim 8, wherein in the image transfer device according to claim 1, an unloading guide unit that guides the transferred layered body to the same side as the loading side and unloads the stacked body. , Is further provided.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
<A. Configuration>
<Overall configuration>
FIG. 1 is a side view illustrating a schematic configuration of an image transfer apparatus 1 according to the present invention, and FIG. 2 is a perspective view illustrating an outline of an internal structure of the image transfer apparatus 1. As shown in FIGS. 1 and 2, the image transfer device 1 includes a main body cover 10, legs 12, an insertion tray 20, a pair of transfer rollers 30, a guide mechanism 50, and a transport mechanism 60. In the image transfer device 1, an image formed on the surface of the image sheet SA by a separate image recording device (not shown) is transferred to the image receiving sheet SB by heating. Therefore, the image sheet SA and the image receiving sheet SB superimposed on each other (hereinafter, the superimposed sheets SA and SB are referred to as a “laminated body SC”) are inserted into the apparatus from the insertion tray 20. The transfer roller 30 is sandwiched between the pair of transfer rollers 30 and is heated by receiving heat from the surface of the transfer roller 30.
[0015]
<Transfer roller 30>
As shown in the perspective view of FIG. 2 and the side view of FIG. 3, the pair of transfer rollers 30 includes an upper transfer roller 31 disposed on the upper side and a lower transfer roller 32 disposed on the lower side. The transfer rollers 31 and 32 are arranged in parallel with each other. The surfaces of these transfer rollers 31, 32 are covered with an elastic material such as silicon rubber. Further, each of the transfer rollers 31 and 32 has a heating element such as a halogen lamp inside the cylinder, and the surface temperature of each of the transfer rollers 31 and 32 can be increased by this heat. Thermal transfer is performed.
[0016]
The upper transfer roller 31 is rotatable about a shaft A1, and is rotatably attached to each arm 33 via bearings (not shown) on both sides thereof. Similarly, the lower transfer roller 32 is rotatable about an axis A2, and is rotatably attached to each arm 34 via bearings (not shown) on both sides thereof.
[0017]
Each arm 33 located on both sides of the upper transfer roller 31 is rotatably mounted on a shaft A3 of a shaft member (not shown) fixed to the side plate 11 inside the main body cover 10, and At a point P1 of the arm 33, the arm 33 is attached to the protrusion 13 fixed to the side plate 11 via an elastic body 37 such as a spring. As a result, the arm 33 and the upper transfer roller 31 stand still at a position where the moment is balanced by the weight of the arm 33 and the upper transfer roller 31 and the restoring force of the elastic body 37 during the rotation about the axis A3. Exists. Further, when a force is applied to the upper transfer roller 31, the elastic body 37 is displaced in accordance with a moment corresponding to the force, so that the impact force can be absorbed. In particular, when the lower transfer roller 32 applies a force vertically upward to the upper transfer roller 31, a pressing force is generated between the upper transfer roller 31 and the lower transfer roller 32.
[0018]
Each arm 34 located on both sides of the lower transfer roller 32 is rotatably attached to a shaft A4 of a shaft member (not shown) fixed to the side plate 11 inside the main body cover 10. I have. A roller 39 is attached to the arm 34 so as to be rotatable about the axis A6. The arm 34 is in contact with the cam 38 at a point P2 via the roller 39.
[0019]
Two cams 38 of the same shape located at both ends of the lower transfer roller 32 are connected to each other by a connecting rod 41 (FIG. 2), and the rotation shaft 43 protruding from one cam 38 and the rotation of the motor M1 are rotated. The rotation drive of the motor M1 is transmitted to each cam 38 by the belt 42 wound around the shaft 44, and both cams 38 are driven to rotate around the shaft A5. Accordingly, with the rotation of the motor M1, the point P2 of the arm 34 moves in the direction B1 (FIG. 3) along the shape of the rotating cam 38, and the arm 34 swings about the axis A4. Do. Thereby, the lower transfer roller 32 can be displaced in the vertical direction (vertical direction).
[0020]
<Cam 38>
FIG. 4 is a diagram showing a contour curve L1 of the cam 38. The rotation angle θ of the cam 38 is such that the cam 38 rotates clockwise in the drawing with reference to the state where the cam 38 contacts the roller 39 at the point Q1 at the point P2. Indicates the rotation angle when rotating. In FIG. 4, the roller 39 is in contact with the cam 38 at a point Q1 on the contour curve L1 (θ = 0). FIG. 5 is a diagram showing the displacement curve L2 of the cam 38, and shows the relationship between the cam rotation angle θ and the cam displacement h. Furthermore, points Q2, Q3, Q4, and Q5 on the contour curve L1 correspond to contact points between the cam 38 and the roller 39 when the rotation angles θ are 30, 150, 180, and 270 degrees, respectively. Here, an error caused by the diameter of the roller 39 is ignored.
[0021]
As shown in these figures, in the range of 0 ≦ θ ≦ 30 (degrees), that is, in the sections Q1 to Q2 of the contour curve L1 (FIG. 4), the displacement h = h1, and the contour curve L1 has a circle having a constant radius h1. (Arc). At this time, the transfer roller 32 exists at the position PA indicated by the solid line in FIG. 3, and the upper transfer roller 31 and the lower transfer roller 32 are pressed against each other (pressed state). Therefore, even when the cam 38 and the roller 39 are in contact with each other at any point in the sections Q1 to Q2 of the contour curve L1, the pressing state between the upper transfer roller 31 and the lower transfer roller 32 is stably generated. Can be. In other words, a stable pressing state can be easily realized even if the control accuracy of the rotation angle of the cam 38 is kept low.
[0022]
Further, the displacement h decreases with an increase in the rotation angle θ of the cam 38, and the lower transfer roller 32 also lowers as the roller 39 lowers, so that the above pressed state is eliminated.
[0023]
Then, in 150 ≦ θ ≦ 180 (degrees), that is, in the sections Q3 to Q4 of the contour curve L1 (FIG. 4), the displacement h = h3, and the contour curve L1 is a part (arc) of a circle having a constant radius h3. Become. At this time, the lower transfer roller 32 exists at a position PB indicated by a double-dashed line in FIG. 3, and the upper transfer roller 31 and the lower transfer roller 32 are separated from each other by a predetermined distance (separated state). Become.
[0024]
Further, the displacement h increases in 180 ≦ θ ≦ 360 (degrees), that is, in the sections Q4 to Q5 to Q1 of the contour curve L1 (FIG. 4). Here, the increase rate of the displacement h is different between the sections Q4 to Q5 (180 ≦ θ ≦ 270) and the sections Q5 to Q1 (270 ≦ θ ≦ 360). First, in the sections Q4 to Q5 in which the pressing force does not act between the transfer rollers 31 and 32, the displacement h is changed from h3 to h2 because the force for raising the roller 39 and thus the lower transfer roller 32 is not so necessary. , The lower transfer roller 32 is raised at a large change rate. On the other hand, in the subsequent sections Q5 to Q1 (270 ≦ θ ≦ 360), when the transfer rollers 31 and 32 start to press down the stacked body SC and the plate-like member 54a (described later) and the like, the transfer rollers 31 and 32 In order to secure a strong nip force between the lower transfer roller 32 and the lower transfer roller 32, the rate of change of the displacement h is reduced and the lower transfer roller 32 is raised along the gentle rising curve of the contour curve L1.
[0025]
Thereafter, when the cam 38 and the roller 39 are in contact with each other in the sections Q1 to Q2 (0 ≦ θ ≦ 30) by continuing the rotation, the transfer rollers 31 and 32 are in a stable pressed state as described above. Become.
[0026]
In this way, the pair of transfer rollers 30 can switch between the pressed state and the separated state by changing the distance between them by the operation of the motor M1 and the cam 38 and the like.
[0027]
In the apparatus of this embodiment, the transfer roller 31, 32 heats and presses the stacked body SC. However, in this type of image transfer, pressing is not necessarily required. “State” can be generally treated as a category of “proximity state”.
[0028]
<Transport mechanism 60>
As shown in FIG. 8, the transport mechanism 60 includes loading rollers 61a, 61b, guide plates 62a, 62b, 62c, 62d, detecting sensors 63a, 63b, peeling claws 64, and unloading rollers 65a, 65b. It has.
[0029]
The carry-in rollers 61a and 61b pinch (nip) the stacked body SC inserted from the opening 22 between the two carry-in rollers 61a and 61b, and carry the laminate SC in the direction of the arrow D1 by the rotation thereof. At that time, the guide plates 62a and 62b play a role of guiding the stacked body SC. The detection sensors 63a and 63b detect the tip of the stacked body SC and confirm its position. Further, the peeling claw 64 peels the stacked body SC pressed against the upper transfer roller 31 by the guide mechanism 50 from the surface of the upper transfer roller 31. The unloading rollers 65a and 65b send out the peeled laminate SC in the directions of arrows D2 and D3, and the insertion tray 20 through the unloading opening 24 arranged on the same side as the loading-side opening 22. Take out to. The guide plates 62c and 62d play a role of guiding the stacked body SC at the time of carrying out.
[0030]
Here, the rotating shafts of the transfer rollers 31 and 32, the carrying-in rollers 61a and 61b, and the carrying-out rollers 65a and 65b are each a rotating shaft of the motor M2 (FIG. 2) using a winding transmission mechanism such as a belt or a chain. The transmission of the rotational drive of the motor M2 can be separated or connected by the clutch mechanisms provided respectively. Therefore, each of the transfer rollers 31, 32, the carry-in rollers 61a, 61b, and the carry-out rollers 65a, 65b can be independently driven to rotate at any time by the motor M2. However, in the present embodiment, since it is not necessary to disconnect the transmission of the rotational drive between the lower transfer roller 32 and the motor M2, the configuration is simplified without providing a clutch mechanism for the lower transfer roller 32. .
[0031]
<Guide mechanism 50>
FIG. 6 is a side view showing a schematic configuration of the guide mechanism 50 shown in FIG. 2 and the like, and FIG. 7 is a perspective view showing a schematic configuration of a part of the guide mechanism 50. As shown in these figures, the guide mechanism 50 includes two side plates 51, a guide sheet 52 which is a sheet-like member, a columnar support member 53, a plate-like member 54a, and an L-shaped member 54b. And a connecting member 55 for connecting the two side plates 51, a fixing bar 56 for fixing the guide sheet 52 to the sheet fixing member 54, and an elastic body 57 for suspending the support member 53. , A protruding member 58 protruding from the side plate 51 toward the side, and a shaft member 59 fixed to the side plate 11 inside the main body cover 10.
[0032]
Each of the two side plates 51 having an inverted L-shaped planar shape has an elongated hole 51a located at the central portion and an inverted U-shaped engaging portion 51b which engages with the shaft member 59, The lower part is connected to each other by a connecting member 55. A support member 53 penetrates a central hole 51a of the side plate 51, and the support member 53 is suspended at both ends by a resilient body 57 such as a spring with respect to a protruding member 58. The side plate 51 is engaged with a shaft member 59 fixed to the side plate 11 inside the main body cover 10 at the engaging portion 51b, and the side plate 51 can swing around the axis A7.
[0033]
The guide sheet 52 is preferably a member having excellent heat resistance and slidability. For example, a sheet obtained by coating the surface of a glass fiber with a fluororesin can be used. The guide sheet 52 is stretched between the support member 53 and the bent portion 54c of the plate-like member 54a, and is L-shaped by two fixing bars 56 and fastening members 56a such as bolts and nuts. It is pressed and fixed against two surfaces forming the L-shape of 54b. The length of the guide sheet 52 is adjusted so as to be along the curved shape of the upper transfer roller 31 when pressed against the upper transfer roller 31. In addition, since the support member 53 is suspended by the protruding member 58 via the elastic body 57, the guide sheet 52 is held against a part of the circumferential curved surface of the upper transfer roller 31 with an appropriate tension. Can be wound up. As described later, in a state where the guide sheet 52 is pressed against the upper transfer roller 31, the stacked body SC is guided between the guide sheet 52 and the upper transfer roller 31 and passes therethrough. Is preferably excellent in slidability.
[0034]
The guide sheet 52 is replaced when the surface wear reaches a predetermined level. The guide mechanism 50 can be easily detached from the image transfer apparatus 1 by releasing the engagement state of the engagement portion 51b with the shaft member 59. Further, the guide sheet 52 of the guide mechanism 50 includes a fixing bar 56. Since it is detachably attached to the guide mechanism 50 by, for example, the guide sheet 52 can be easily replaced.
[0035]
The sheet fixing member 54 includes a plate-like member 54a obtained by bending a long plate-like component along a center line thereof, and a long L-like member having an L-shaped cross-sectional shape. And a U-shaped member 54b. The plate-shaped member 54a and the L-shaped member 54b are formed of a material having rigidity higher than at least the surfaces of the transfer rollers 31 and 32. In this embodiment, the plate-shaped member 54a and the L-shaped member 54b are manufactured using a metal material such as iron or aluminum. ing. As shown in FIG. 7, the plate member 54a is welded to the L-shaped member 54b in a state where the bent portion 54c is disposed on the distal end side. As will be described later, a plate-like member extending along the axial direction of the pair of transfer rollers 31 and 32 forms an interaction area between the pair of transfer rollers 31 and 32 (as illustrated in FIG. 11, the transfer rollers 31, 32). 32, and can move back and forth with respect to a region G) near an imaginary surface S connecting the respective central axes of the transfer rollers 31 and 32. Since the bent portion 54c of the plate member 54a is appropriately rounded, the wear of the guide sheet 52 at the bent portion 54c can be suppressed.
[0036]
The sheet fixing member 54 further includes a member 54d fixed to the L-shaped member 54b, and a shaft member 54f fixed to the side plate 51 passes through a hole 54e of the member 54d. ing. Therefore, the sheet fixing member 54 is not fixed to the side plate 51, but is attached to the side plate 51 so as to be rotatable about the axis A8 of the shaft member 54f. When the transfer rollers 31 and 32 are separated from each other, the sheet fixing member 54 is in a state in which the bent portion 54c is shifted downward due to its own weight, for example, as shown in FIG. Is a state in which the plate member 54a is lifted by the lower transfer roller 32, for example, as shown in FIG.
[0037]
<B. Operation>
Next, the operation of the image transfer apparatus 1 will be described with reference to schematic side views of FIGS.
[0038]
FIG. 8 is a diagram showing an initial state, in which the lower transfer roller 32 is located at the position PB (FIG. 3), and the two transfer rollers 31, 32 are in the above-mentioned separated state. At this time, the bent portion 54c of the plate member 54a around which the guide sheet 52 is wound is in a state of being inserted into the interaction area G in the gap between the transfer rollers 31 and 32 in the separated state. That is, the plate member 54a is rotatable around the horizontal shaft member 59 via members such as the side plate 51, and the plate member 54a is brought into a stable state around the shaft member 59 by its own weight, and interacts with each other. This is because the vehicle enters the area G.
[0039]
In this state, the stacked body SC in a state where the image receiving sheet SB is superimposed on the image sheet SA is placed on the insertion tray 20 and then inserted from the opening 22 in the direction of the arrow D1. When the leading end of the stacked body SC reaches the position of the detection sensor 63a, the rotational drive of the motor M2 is transmitted to the lower transfer roller 32 and the carry-in rollers 61a and 61b, each of which is directed in the direction of the arrow in the figure. Start rotating. Thus, the stacked body SC sandwiched between the loading rollers 61a and 61b is further transported in the direction of arrow D1. Then, after the detection sensor 63b detects the leading end of the stacked body SC, the carry-in rollers 61a and 61b continue the rotation of the stacked body SC for a predetermined time according to the feed speed of the stacked body SC. Is reached to the position of point P3 in FIG. 9, and the rotation is stopped at that point.
[0040]
Then, as shown in FIG. 10, the lower transfer roller 32 existing at the position PB moves upward with the operation of the motor M1, the cam 38, the arm 34, and the like, and is moved to the upper transfer roller 31. Approach. When the lower transfer roller 32 moves to the position PA (FIG. 3), the transfer rollers 31, 32 enter the above-described pressed state.
[0041]
In the apparatus of this embodiment, since the plate-like member 54a is displaced upward by the upward displacement of the lower transfer roller 32, the pair of transfer rollers 31, 32 are in a pressed state (generally a close state). The timing of the transition and the timing of sandwiching the stacked body SC between the plate-like member 54a and the upper transfer roller 31 are substantially the same. However, in a case where a driving mechanism for displacing the plate member 54a is separately provided, the stack SC is sandwiched between the upper transfer roller 31 by first displacing the plate member 54a upward, and then the lower side. The transfer roller 32 may be displaced upward to shift to a pressed state.
[0042]
FIG. 11 is a partially enlarged view of a state where the transfer rollers 31 and 32 are pressed. The plate member 54 a around which the guide sheet 52 is wound is urged upward by the lower transfer roller 32, and sandwiches the stacked body SC with the upper transfer roller 31. At this time, the laminate SC is uniformly pressed against the upper transfer roller 31 by the high-rigidity plate-like member 54a over the longitudinal direction D0 (the direction perpendicular to the paper surface of FIG. 11) (see also FIG. 7). Since it is extended, it is possible to prevent wrinkles at the tip of the stacked body SC. Here, the reason why such an effect is exhibited is that the plate member 54a plays a role as a so-called "ironing board" by pressing the highly rigid plate member 54a against the laminate SC. it is conceivable that. Further, when the plate member 54a having high rigidity is pressed against the upper transfer roller 31 with a strong pressing force, the surface of the upper transfer roller 31 having elasticity is deformed in accordance with the upper surface of the plate member 54a, and the lamination is performed. Since the tip of the body SC is extended over a wide “plane”, it is considered that the effect of preventing the wrinkles of the laminated body SC is exhibited particularly efficiently.
[0043]
As described above, the plate-shaped member 54a functions as a sandwiching unit that sandwiches the distal end portion of the highly rigid laminate SC with the one transfer roller 31.
[0044]
Further, since the stacked body SC is uniformly stretched in the direction D0 using the plate member 54a at the front end thereof, the pressing and heating are continuously performed by the transfer rollers 31 and 32 in the portions subsequent to the front end. The generation of wrinkles can be prevented also in the portion subsequent to the tip. This is considered to be due to the fact that the tip portion is kept in a uniform tension state in the direction D0 at the first time point, so that wrinkles are less likely to occur at the subsequent time points. Alternatively, conversely, when the leading end of the stacked body SC is in an uneven state in the direction D0, even if “wrinkles” are not generated at that time, the uneven state is further promoted after the leading end. It is supposed that a situation in which “wrinkles” are likely to occur is assumed. However, it can be considered that such a situation is prevented.
[0045]
In FIG. 11, the leading end of the image receiving sheet SB protrudes forward from the leading end of the image sheet SA in the stacked body SC, but is not limited thereto. For example, as shown in FIG. 12, it is more preferable that the front end of the image sheet SA and the front end of the image receiving sheet SB are sandwiched by the plate member 54a in a state where they are aligned. Alternatively, as shown in FIG. 13, the leading end of the image receiving sheet SB may protrude forward from the leading end of the image sheet SA. However, when the leading end of the image sheet SA projects beyond the image receiving sheet SB, there is a possibility that the image of the image sheet SA is transferred to the lower guide sheet 52 instead of the image receiving sheet SB. FIG. 11 shows a case where the leading end of the image receiving sheet SB is projected forward of the leading end of the image sheet SA in order to avoid such a situation. In the present specification, any of these states is expressed as “the tip of the laminate”.
[0046]
Further, as shown in FIG. 14, the upper transfer roller 31 starts rotating at the same time as the transfer rollers 31 and 32 are pressed. Before the pressing state as shown in FIGS. 10 and 11 is achieved, the lower transfer roller 32 has been rotating at a sufficiently low speed in the direction of the arrow, and the upper transfer roller 31 has the same speed as the lower transfer roller 32. The rotation is performed so that the directions are the same and the directions are opposite. With the rotation of the transfer rollers 31, 32, the plate member 54a inserted between the transfer rollers 31, 32 is discharged from the interaction area G of the pair of transfer rollers 31, 32 toward the discharge side (in the direction of arrow D4). ) Extruded. Therefore, a driving mechanism for pulling the plate member 54a from the stacked body SC is not required, and the driving mechanism can be simplified.
[0047]
Here, since the rotation speed of the transfer rollers 31 and 32 is sufficiently lower than the rising speed of the lower transfer roller 32 toward the upper transfer roller 31, the leading end of the stacked body SC is in contact with the plate member 54a. An operation is achieved in which the plate member 54a is pushed out after being sufficiently sandwiched between the upper transfer roller 31 and the upper transfer roller 31.
[0048]
Then, the stacked body SC slides on the guide sheet 52 in a state of being attached to the surface of the upper transfer roller 31, between the support member 53 and the plate member 54 a along the shape of the upper transfer roller 31. While being guided by the stretched guide sheet 52, the sheet is conveyed by passing between the upper transfer roller 31 and the guide sheet 52.
[0049]
At this time, the guide sheet 52 has a shape along a part of the circumferential curved surface C of the upper transfer roller 31, and the stacked body SC moves between the guide sheet 52 and the upper transfer roller 31. Since the sheet is conveyed while being guided along a part of the circumferential curved surface C, and thus guided by the guide sheet 52 over a wide area, generation of "wrinkles" can be more effectively prevented.
[0050]
Here, since the guide sheet 52 has flexibility, the guide sheet 52 is wound around a part of the circumferential curved surface C so that its shape easily matches the shape of the circumferential curved surface C. Can be.
[0051]
Thereafter, as shown in FIG. 15, the stacked body SC that has adhered to the surface of the upper transfer roller 31 is separated from the surface of the upper transfer roller 31 by the separation claw 64, and is guided and transported by the guide plate 62c. .
[0052]
Further, after the stacked body SC is sent out by the unloading rollers 65a and 65b, it is guided by the guide plate 62d, and is unloaded from the opening 24 so that the image sheet SA is below the image receiving sheet SB ( (FIG. 16). Then, the lower transfer roller 32 is moved to the position PB by the operation of the motor M2, the cam 38 and the like, descends, and returns to the initial state of FIG.
[0053]
Here, both the opening 22 and the opening 24 are arranged on the same side of the image transfer apparatus 1 as the side on which the operator is located, and the stacked body SC is carried out from the same side as the side to be carried in. . Therefore, operability is good, and it is not necessary to separately provide a tray or the like for receiving the stacked body SC to be carried out, so that space can be saved.
[0054]
<C. Modification>
In the above-described embodiment, the case where the transfer roller 31 is driven by connecting the rotation shaft of the transfer roller 31 and the rotation shaft of the motor M2 via the winding transmission mechanism and the clutch has been described. It is not limited to. For example, the outer circumferences of both transfer rollers 31, 32 in a pressed state (such as FIG. 10) of both transfer rollers 31, 32 without connecting the rotation axis of transfer roller 31 and the rotation axis of motor M2 by a winding transmission mechanism or the like. The rotational drive of the transfer roller 32 may be transmitted to the transfer roller 31 by friction generated between the surfaces. This also allows the transfer rollers 31 and 32 to be in the pressed state and start the rotation of the transfer roller 31 at the same time.
[0055]
In the above-described embodiment, the lower transfer roller 32 is pressed against the upper transfer roller 31 while rotating at a sufficiently low speed, so that the plate-shaped member 54a and the upper transfer roller 31 can be sandwiched between the plate member 54a and the upper transfer roller 31. Although the pushing operation of the shaped member 54a has been performed almost simultaneously, it is not limited to this. For example, the lower transfer roller 32 is pressed against the upper transfer roller 31, and the leading end of the stacked body SC is sufficiently sandwiched between the plate member 54a and the upper transfer roller 31, and after a predetermined time interval, The rotation of both the transfer rollers 31 and 32 may be started to push out the plate member 54a.
[0056]
Further, in the above-described embodiment, the leading end of the stacked body SC is sandwiched between the upper transfer roller 31 by the plate-shaped member 54a around which the guide sheet 52 is wound, but is not limited thereto. For example, as shown in FIG. 17, a long plate member 154 whose longitudinal direction is the axial direction of the transfer rollers 31 and 32 is inserted into the interaction area G of the gap between the transfer rollers 31 and 32 in the separated state. Alternatively, the stacked body SC may be interposed. Also in this case, the stacked body SC is pressed by the lower transfer roller 32 in a state of being sandwiched between the long member 154 and the upper transfer roller 31, so that wrinkling is prevented as in the above-described embodiment. It is possible.
[0057]
In this case, it is not possible to provide a structure for obtaining the same effect as the above-described guide sheet 52 by additionally providing a member for extending the guide sheet 52 between the support member 53 and the support member 53. However, in the above-described embodiment, the plate-like member 54a functioning as the sandwiching means is also used as a part of the guide mechanism 50, so that a more simplified mechanism can be provided.
[0058]
【The invention's effect】
As described above, according to the image transfer device of the first aspect, after the plate-like member is inserted into the interaction area in the separated state of the pair of transfer rollers, the leading end of the stacked body is one-sided by the plate-like member. And a pair of transfer rollers is brought into a close state simultaneously with or after the sandwiching, and in synchronization with the rotation of the pair of transfer rollers, the plate-like member and the leading end of the laminate are paired. It is discharged from the interaction area of the transfer roller. Therefore, the leading end of the laminate can be sandwiched between the plate-shaped member and one of the transfer rollers, thereby preventing the laminate from being wrinkled.
[0059]
According to the image transfer device of the second aspect, the plate member is discharged from the interaction area between the pair of transfer rollers by the rotational force of the pair of transfer rollers. Therefore, it is not necessary to separately provide a drive mechanism for discharging the plate-shaped member from the interaction area, so that the drive mechanism can be simplified.
[0060]
According to the image transfer device of the third aspect, the stacked body that has passed through the interaction area of the pair of transfer rollers is guided by the guide mechanism so as to follow a part of the circumferential curved surface of one of the transfer rollers. Therefore, it is possible to prevent the laminate from wrinkling.
[0061]
According to the image transfer device of the fourth aspect, since the sheet-like member supported by the sheet support structure is stretched along a part of the circumferential curved surface of one of the transfer rollers, the shape of the sheet-like member is reduced. It is easy to make the shape conform to the shape of the circumferential curved surface.
[0062]
According to the image transfer device of the fifth aspect, since the sheet-like member is detachably attached to the sheet support structure, the sheet-like member can be easily replaced.
[0063]
According to the image transfer device of the sixth aspect, since the sandwiching means is also used as a part of the guide mechanism, the mechanism can be simplified.
[0064]
According to the image transfer device of the present invention, the cam used in the mechanism for switching between the close state and the separated state of the pair of transfer rollers has a section in which the displacement is constant in the close state of the transfer rollers. Since the cam has a curve, it is possible to provide a margin in the positioning accuracy of the rotation angle of the cam, and it is possible to easily realize a constant and stable proximity state.
[0065]
According to the image transfer apparatus of claim 8, since the transferred laminate is guided and carried out to the same side as the loading side, the operability is good, and the tray for receiving the carried out laminate is good. Since there is no need to separately provide such components, a space-saving configuration can be achieved.
[Brief description of the drawings]
FIG. 1 is a side view showing a schematic structure of an image transfer device 1 according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a schematic structure of the image transfer device 1.
FIG. 3 is a side view illustrating a schematic configuration of a pair of transfer rollers 30.
FIG. 4 is a diagram showing a contour curve L1 of a cam 38.
FIG. 5 is a diagram showing a displacement curve L2 of a cam 38.
FIG. 6 is a side view showing a schematic configuration of a guide mechanism 50.
FIG. 7 is a perspective view showing a schematic configuration of a part of a guide mechanism 50.
FIG. 8 is a side view showing a schematic structure of the image transfer device 1.
FIG. 9 is a diagram illustrating the operation of the image transfer device 1.
FIG. 10 is an explanatory diagram relating to the operation of the image transfer device 1.
FIG. 11 is a partially enlarged view in a state where transfer rollers 31 and 32 are pressed.
FIG. 12 is a partially enlarged view of a state where transfer rollers 31 and 32 are pressed.
FIG. 13 is a partially enlarged view in a state where transfer rollers 31 and 32 are pressed.
FIG. 14 is an explanatory diagram relating to the operation of the image transfer device 1.
FIG. 15 is an explanatory diagram relating to the operation of the image transfer device 1.
FIG. 16 is an explanatory diagram relating to the operation of the image transfer device 1.
FIG. 17 is a side view of an image transfer device according to a modified example of the invention.
[Explanation of symbols]
1 Image transfer device
31, 32 Transfer roller
33,34 arms
38 cams
50 Guide mechanism
52 Guide Sheet
53 support members
54 Seat fixing member
54a, 154 plate member
60 transport mechanism
62a, 62b, 62c, 62d Guide plate
SA image sheet
SB image receiving sheet
SC laminate

Claims (8)

An image transfer device that transfers an image formed on the image sheet to the image receiving sheet by heating the laminate in a state where the image sheet and the image receiving sheet are superimposed,
A pair of transfer rollers that are arranged in parallel with each other, are heated by a predetermined heating source, and can switch between a close state and a separated state by changing the distance between them,
A plate-like member extending along the axial direction of the pair of transfer rollers, wherein the plate-like member is allowed to advance and retreat in an interaction area of the pair of transfer rollers, and one of the transfer rollers and the plate-like member Sandwiching means capable of sandwiching the tip of the laminate between members,
With
After the plate member is inserted into the interaction area in the separated state,
Simultaneously with or between the plate-like member and the one transfer roller sandwiching the leading end of the stacked body, or after that, the pair of transfer rollers in a close state,
The image transfer apparatus according to claim 1, wherein the plate-like member is discharged from the interaction area of the pair of transfer rollers together with the leading end of the stacked body in synchronization with the rotation of the pair of transfer rollers. The image transfer device according to claim 1,
An image transfer apparatus, wherein the plate-like member is discharged from the interaction area between the pair of transfer rollers by a rotational force of the pair of transfer rollers. In the image transfer device according to claim 1 or 2,
A guide mechanism that guides the stacked body that has passed through the interaction area of the pair of transfer rollers along a part of the circumferential curved surface of the one transfer roller;
An image transfer device, further comprising: The image transfer device according to claim 3,
The guide mechanism,
A sheet-like member stretched along a part of the circumferential curved surface of the one transfer roller,
A sheet support structure for supporting the sheet-like member,
Has,
An image transfer apparatus, wherein the stacked body is guided and passes between the sheet-shaped member and the one transfer roller. The image transfer device according to claim 4,
The image transfer device, wherein the sheet-like member is detachably attached to the sheet support structure. The image transfer device according to any one of claims 3 to 5,
The image transfer apparatus according to claim 1, wherein the sandwiching unit is also used as a part of the guide mechanism. The image transfer device according to any one of claims 1 to 6,
By displacing the position of the one transfer roller using a cam, the state of proximity and the state of separation of the pair of transfer rollers are switched,
The image transfer device according to claim 1, wherein the cam has a cam curve having a section in which the displacement is constant in a state where the pair of transfer rollers are close to each other. The image transfer device according to any one of claims 1 to 7,
Unloading guide means for guiding the transferred laminate to the same side as the loading side and unloading the stack,
An image transfer device, further comprising:

Images