JP2010002512A - Hot stamp device, hot stamp method, and endless elastic belt employing the method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an endless elastic belt capable of improving the accuracy of position detection.
In order to attach a reflection mark for detecting a moving position to a peripheral portion of an outer surface of an endless elastic belt, a reflection tape having a constant width W1 is supplied over a region where the reflection mark of the endless elastic belt is to be attached, A heater member 9 that holds the inner surface of the endless elastic belt in a tensioned state on the pedestal 8, is disposed above the region where the reflection mark is to be attached, can be raised and lowered, and hot stamps the reflection mark from the reflection tape on the endless elastic belt. And the length W2 of the heating surface of the heater member in the circumferential direction, which is the conveying direction of the endless elastic belt, is made larger than the constant width W1.
[Selection] Figure 4

Description

  The present invention relates to a hot stamping apparatus, a hot stamping method, and an endless elastic belt by the method.

  By providing a belt mark for each screen size on an endless elastic belt provided with a surface for recording a latent image of an image forming drum of an image forming apparatus, and detecting the belt mark to prevent displacement during conveyance. A technique that enables formation of a highly accurate image is known (Patent Document 1).

Further, a pattern line is recorded on an endless elastic belt having a surface for recording a latent image of each color of Y, M, C, and B of an image forming drum of a color image forming apparatus, and this pattern line is detected for each color. A technique for preventing the displacement of one screen is also proposed. (Patent Document 2)
On the other hand, there is also known a technique of hot stamping a reflection mark for detecting a moving position on a peripheral portion of an outer surface of an endless elastic belt movable by being stretched by a driving roller and a driven roller in association with a latent image. Yes. As described above, since the endless elastic belt used for the image forming apparatus is required to have conductivity for forming a latent image, it usually contains a conductive material such as carbon black.
JP 2006-154289 A JP 2006-2559531 A

  As described above, the reflection mark hot stamped for detecting the moving position is detected by the optical sensor at both ends perpendicular to the conveying direction of the endless elastic belt. For this reason, both ends of the reflection mark are free from burrs and the like, and it is an indispensable condition for correct position detection to form a straight line.

  Therefore, in view of the above circumstances, the present invention provides a highly accurate optical sensor by linearly forming both end edges orthogonal to the conveyance direction of the endless elastic belt of the hot stamped reflection mark for detecting the moving position. It is intended to be detectable.

  In order to solve the above-described problems, according to the present invention, there is provided a hot stamp device for attaching a reflection mark for detecting a moving position to a peripheral portion of an outer surface of an endless elastic belt, and providing the reflection mark with a certain width. Reflective tape supply means for supplying the reflective tape onto the region where the reflection mark of the endless elastic belt is to be attached, and movable with respect to the endless elastic belt, pressing the inner surface of the endless elastic belt to Belt jig means for holding the region where the reflection mark is to be attached in a tension state, and the upper end of the endless elastic belt is disposed above the region where the reflection mark is to be attached, and is movable up and down and on the endless elastic belt. A heater member for hot stamping the reflective mark from the reflective tape, and the length of the heating surface of the heater member is Than constant width, and being larger in the circumferential direction as the conveying direction of the endless elastic belt.

  The reflective tape includes a base film layer facing the heating surface of the heater member, a release layer on the base film layer, a protective coloring layer on the release layer, and metal deposition on the protective coloring layer. A layer and an adhesive layer on the metal deposition layer are laminated.

  Also, a hot stamping method for attaching a reflection mark for detecting a moving position to the peripheral portion of the outer surface of the endless elastic belt, wherein the reflection mark of the endless elastic belt to be attached is held in a tension state. Further comprising a step of hot stamping the reflection mark by pressing a heater member against a reflection tape having a fixed width, which is placed so as to be orthogonal to the moving direction of the endless elastic belt, and providing the reflection mark. The length of the heating surface of the heater member in the circumferential direction, which is the belt conveyance direction, is larger than a certain width of the reflective tape.

  And it is characterized by the endless elastic belt manufactured by said hot stamp method, and the both ends of the said reflective mark in the circumferential direction used as the conveyance direction of the said endless elastic belt being linearly formed.

  According to the present invention, it is possible to satisfy essential conditions for correct position detection by linearly hot stamping both end edges orthogonal to the conveying direction of the endless elastic belt.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a periphery of an outer surface 1a of an endless elastic belt 1 stretched by a driving roller 2 and a driven roller 3 so as to be movable. 2 is an external perspective view illustrating a state in which a reflection mark 4 for detecting a movement position is attached to a part and position detection is performed by an optical sensor 5. FIG.

  The endless elastic belt 1 is made of, for example, a raw material in which carbon carbon black is mixed into a chloroprene rubber material or a urethane resin material, and is subjected to centrifugal molding or extrusion molding. The surface 1a of the endless elastic belt 1 is polished by setting and setting the mandrel in a polishing apparatus, and the polishing surface can be obtained by spray coating with urethane resin. The endless elastic belt 1 manufactured in this way is stretched by a driving roller 2 and a driven roller 3 as shown in the figure so as to be movable. On the outer surface 1a of the endless elastic belt 1, Y, M, A latent image G of each color of C and B is formed, and a reflection mark 4 for detecting a moving position detected by the optical sensor 5 is attached to a position corresponding to the latent image G. The optical sensor 5 is fixed to the base of the image forming apparatus, irradiates the light beam from the light emitting element 5a onto the reflection mark 4, and the reflected light is detected by the light receiving element 5b and converted into an electric signal and then sent to the central control unit. The position of the individual latent image G is detected by sending. Specifically, the reflected light from the edges 4a and 4b of the reflection mark 4 is detected. For this reason, it is an indispensable condition for correct position detection to linearly hot-stamp both end edges 4a and 4b.

  FIG. 2A is a plan view illustrating a conventional hot stamp state, and FIG. 2B is a plan view illustrating a hot stamp state according to the present invention.

  As shown in FIG. 2 (a), according to the conventional hot stamping apparatus, the endless elastic belt 1 is set on the base 8 shown by the broken line, and the long reflective tape 111 is positioned on the surface 1a. The reflective mark 104 is formed by hot stamping by moving a heater member 109 having a heating surface 109a having a width dimension W or less of the reflective tape. For this reason, burrs may occur at the edges 104a and 104b of the reflection mark 104.

  On the other hand, as shown in FIG. 2B, according to the hot stamping apparatus of the present invention, the endless elastic belt 1 is set on the pedestal 8 shown by the broken line, and the reflection mark 4 is formed on the surface 1a. A long reflective tape 11 having a width dimension W1 (for example, 10 mm) to be the edge portions 4a and 4b is positioned, and a width dimension W2 (for example, 12 mm) greater than or equal to the width dimension W1 of the reflective tape and the left and right lengths. By moving the heater member 9 having the heating surface 9a having (for example, 9 mm) downward and forming the reflective mark 4 by hot stamping, no burrs are generated at the edges 4a and 4b of the reflective mark 4. I have to. The heating surface 9a of the heater member 9 further forms a large arc having a radial dimension R of 4000 mm, and the air accumulated between the surface 1a and the adhesive surface of the reflective tape during hot stamping is driven to the outside. Uniform hot stamping is possible.

  According to the endless elastic belt 1 prepared through the above steps, both end edges 4a and 4b of the reflection mark 4 are formed linearly, so that stable optical detection can be performed.

  Next, FIG. 3 is a schematic cross-sectional view of the reflective tape 11. In this figure, the same reference numerals are given to the components or parts already described, and the description thereof is omitted. The reflective tape 11 includes a base film layer 11a of polyethylene terephthalate film having a thickness of 16 microns and a wax system thereon. And an acrylic-based release layer 11b having a thickness of 0.5 micron, an acrylic epoxy-based protective coloring layer 11c having a thickness of 1 micron, and an aluminum layer having a thickness of 500 angstroms deposited thereon. The vapor deposition layer 11d and the adhesive layer 11e having a thickness of 1 to 2 microns are integrally formed thereon.

  On the other hand, the heater member 9 is fixed to a hot plate 10 containing a heater 10a, and is lowered onto the pedestal 8 in the direction of the arrow to perform hot stamping and move to an upper standby position after hot stamping. It is configured. By this hot stamping, the adhesive layer 11e is adhered and fixed to the surface 1a, so that the vapor deposition layer 11d and the protective coloring layer 11c remain on the surface 1a of the belt 1 and peel off from the base film layer. The layer is rolled up to prepare for the next hot stamp.

  FIG. 4 is an external perspective view schematically showing the hot stamping apparatus together with XYZ axes orthogonal to each other.

  In this figure, the same reference numerals are given to the components or parts that have already been described, and the description thereof is omitted. The hot stamping device having a base (not shown) follows the reflective tape 11 along the Y-axis direction in the figure. The reflective tape supply device 6 configured to intermittently feed is provided. For this purpose, the reflective tape supply device 6 is rotated in the clockwise direction by a reel 61 provided via a clutch (not shown) that is rotatable with respect to the base on the left side in the figure and a stepping motor 69 that is rotatable on the right side in the figure. And a reel 61 driven intermittently.

  An unused reflective tape 11 wound around a core (not shown) is set on the reel 61 on the left side of the reflective tape supply device 6 so that necessary tension is applied between rollers (not shown), and then hot stamping is performed. The later used reflective tape 11 is wound up by intermittently driving the right reel 61 in the direction of the arrow as the stepping motor 69 is energized.

  The endless elastic belt 1 is set at a position illustrated by a one-dot chain line. In order to set the endless elastic belt 1 in this way, the inner peripheral surface is supported by the four rods 57. That is, the inner peripheral surface of the endless elastic belt 1 completed in the previous step is stretched over the rods 57, and the inner surface of the endless elastic belt 1 is pressed so that the region where the reflection mark should be attached can be held in tension. ing.

  On the other hand, the heater member 9 is fixed to the lower surface of the hot plate 10 provided to be movable up and down in the Z-axis direction with respect to the base. Further, the reflective mark 11 is hot stamped from the reflective tape 11 by moving the heater member 9 up and down (in the Z-axis direction).

  FIG. 5 is a flowchart for explaining the operation of the hot stamping apparatus of FIG. In this figure, it progresses to step S1 and an endless elastic belt is set to a belt jig not shown. Subsequently, in step S2, the inner peripheral surface is positioned on the pedestal 8, and a driving rod (not shown) is driven to be in a tension state. Subsequently, in step S3, the belt jig is moved to the hot stamp position to be in the state shown in FIG.

  Next, in step S4, the reflective tape 11 is sent out in the Y-axis direction, and stopped on the outer peripheral surface facing the pedestal 8. In step S5, the heater member 9 is lowered from the standby position and the belt is pressed with a pressure required for hot stamping. Following this, in step S6, for example, the above-mentioned pressing state is maintained for 0.5 seconds, and hot stamping is performed at 140 ° C. At this time, the edge portion that becomes the boundary portion of the reflection mark 4 can be hot stamped linearly. Thereafter, the process proceeds to step S7, and the heater member 9 is raised to the standby position by driving the lifting device. Next, the process proceeds to step S8, and the reflective tape 11 in close contact is peeled off by, for example, movement of a peeling rod (not shown). In step S9, the belt jig 5 is moved from the hot stamp position to the take-out position, and in step S10, the endless elastic belt 1 after hot stamping is taken out to finish the process.

  The hot stamp apparatus configured as described above is only an example, and it goes without saying that various apparatuses based on the hot stamp principle described with reference to FIG.

A state in which an endless elastic belt 1 is stretched by a driving roller 2 and a driven roller 3 and a reflection mark 4 for detecting a moving position is attached to a peripheral portion of the outer surface 1 a movably provided, and the optical sensor 5 detects the position. FIG. (a) is a plan view illustrating a conventional hot stamp state, and (b) is a plan view illustrating a hot stamp state according to the present invention. 3 is a schematic cross-sectional view of the reflective tape 11. FIG. It is the external appearance perspective view which illustrated the hot stamp apparatus typically. It is a flowchart of operation | movement description of a hot stamp apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Endless elastic belt 2 Drive roller 3 Driven roller 4 Reflection mark 5 Belt jig 6 Reflective tape supply mechanism 8 Base 9 Heater member 10 Hot plate 11 Reflective tape 11a Base film layer 11b Peeling layer 11c Protective coloring layer 11d Aluminum vapor deposition layer 11e Adhesion layer

Claims (4)

A hot stamp device for attaching a reflection mark for detecting a moving position to the periphery of the outer surface of an endless elastic belt,
Reflective tape supply means for supplying a reflective tape having a constant width to provide the reflective mark onto an area of the endless elastic belt to which the reflective mark is to be attached;
Belt jig means that is movable with respect to the endless elastic belt, presses an inner surface of the endless elastic belt, and holds a region where the reflection mark is to be attached in a tension state;
A heater member that is disposed above a region where the reflection mark of the endless elastic belt is to be attached, and that can freely move up and down and hot stamps the reflection mark from the reflection tape on the endless elastic belt;
The hot stamping device is characterized in that a length of the heating surface of the heater member is larger than a certain width of the reflective tape in a circumferential direction which is a conveying direction of the endless elastic belt.   The reflective tape includes a base film layer facing the heating surface of the heater member, a release layer on the base film layer, a protective coloring layer on the release layer, and a metal vapor deposition layer on the protective coloring layer. The hot stamping device according to claim 1, wherein an adhesive layer on the metal deposition layer is laminated. A hot stamp method for attaching a reflection mark for detecting a moving position to the periphery of an outer surface of an endless elastic belt,
A constant width of the endless elastic belt, which is held in a tensioned state, is placed on a region to which the reflection mark of the endless elastic belt is to be attached so as to be orthogonal to the moving direction of the endless elastic belt. Hot stamping the reflective mark by pressing a heater member against the reflective tape;
A hot stamping method, wherein a length of a heating surface of the heater member in a circumferential direction as a conveying direction of the endless elastic belt is larger than a certain width of the reflective tape.   An endless elastic belt manufactured by the hot stamping method according to claim 3, wherein both end edges of the reflection mark in a circumferential direction which is a conveying direction of the endless elastic belt are linearly formed.

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