Device for manufacturing LED reflector plate

Abstract

Disclosed is an apparatus for manufacturing an LED reflector plate. The present invention provides an improved apparatus for manufacturing an LED reflective sheet, in which release paper adhesive printing grooves are integrally formed on both sides of a printing roller in which pattern printing grooves are formed along the outer periphery of the printing roller, such that when a photoinduced pattern is printed on a reflective sheet by the printing roller, a release paper adhesive pattern is also printed, and the pattern printing groove is formed on the outer periphery of the printing roller. Thus, both ends of the release paper are also adhered to the release paper adhesive pattern during adhesion of the release paper to the reflective sheet, thereby preventing a tilting phenomenon from occurring between the release paper and the reflective sheet.

Description

Technical Field

[0001] The present invention relates to an apparatus for manufacturing an LED reflective sheet, and more particularly, to an improved apparatus for manufacturing an LED reflective sheet, wherein release paper adhesive printing grooves are integrally formed on both sides of a printing roller having a pattern printing groove formed therein along the periphery, so that when a photosensitive pattern is printed on the reflective sheet by the printing roller, the release paper adhesive pattern is also printed, so that during the period when the release paper is attached to the reflective sheet, both ends of the release paper are also adhered to the release paper adhesive pattern, thereby preventing a warping phenomenon from occurring between the release paper and the reflective sheet. Background Art

[0002] Generally speaking, LED reflective sheet is a sheet with photosensitive patterns printed on its surface, which emits light by partially reflecting the light through the photosensitive patterns when it is illuminated with light from an LED. LED reflective sheets are used for advertising signs, road signs, POPs, window signs, etc.

[0003] An example of an apparatus for manufacturing a reflection sheet is disclosed in Korean Utility Model Registration No. 20-0451991.

[0004] The conventional equipment for manufacturing a reflective sheet disclosed in the above registered utility model includes: a reflective sheet supply unit, which is configured to supply a reflective sheet wound on a roller in the form of a roll; a pattern printing unit, which is configured to form a photosensitive pattern on the surface of the reflective sheet supplied by the reflective sheet supply unit; a drying unit, which is configured to dry the photosensitive pattern formed on the surface of the reflective sheet; a release paper supply roll, which is configured to supply release paper to be attached to the surface of the reflective sheet on which the photosensitive pattern is formed; a release paper attaching unit including a release paper pressing roller, which is configured to press the release paper so that it adheres to the surface of the reflective sheet; and a discharge unit, which is configured to roll the reflective sheet with the release paper attached in the form of a roll.

[0005] However, the reflective sheet manufactured by the conventional equipment for manufacturing the reflective sheet is stored in a roll type and attached with release paper to protect the photosensitive pattern, and the release paper is attached only to the photosensitive pattern with adhesiveness. Therefore, when the reflective sheet with the release paper attached is rolled up and stored in a roll type, the edge portion of the reflective sheet often warps due to refraction, so that air flows into the warped space, causing the adhesive liquid to harden or dry, thereby increasing the defect rate of the product.

[0006]

Related technical literature

[0007] [Patent Literature]

[0008] 1) Korean Utility Model Registration No. 20-0451991 (Registration Date: January 18, 2011), Device Name: “Apparatus for Manufacturing a Reflective Sheet Having a Photoinduced Pattern”.

[0009] 2) Korean Patent Registration No. 10-1144894 (Registration Date: May 3, 2012), Invention Name: "Method for manufacturing a reflective sheet having a photosensitive pattern, method for manufacturing a light guide plate with the reflective sheet attached, system for manufacturing a reflective sheet, and system for manufacturing a light guide plate with the reflective sheet attached".

[0010] 3) Korean Patent Registration No. 10-1269666 (Registration Date: May 24, 2013), Invention Name: "Bag Sheet for Light-emitting Device and Light-emitting Device Using the Same".

[0011] 4) Korean Patent Registration No. 10-2391807 (Registration Date: April 25, 2022), Invention Name: "Reflective sheet and road sign using the same". Summary of the invention

[0012] The present invention is proposed to improve the above-mentioned problems, and its purpose is to provide an apparatus for manufacturing an LED reflective sheet, wherein release paper adhesive printing grooves are integrally formed on both sides of a printing roller having a pattern printing groove formed therein along the outer circumference, so that when a photosensitive pattern is printed on the reflective sheet by the printing roller, the release paper adhesive pattern is also printed, so that during the period when the release paper is attached to the reflective sheet, both ends of the release paper are also adhered to the release paper adhesive pattern, thereby preventing the release paper and the reflective sheet from warping, so as to solve the problem of reduced adhesion due to air inflow.

[0013] Another object of the present invention is to provide an apparatus for manufacturing an LED reflective sheet, which has an improved structure for controlling the tension of the sheet and for adjusting the gap between the rubber roller and the printing roller so as to maintain optimal printing conditions when printing a photosensitive pattern and a release paper adhesive pattern on the reflective sheet, and an improved structure for adjusting the position of a reflective liquid tray.

[0014] To achieve the above object, according to one aspect of the present invention, there is provided an apparatus for manufacturing an LED reflective sheet, the apparatus comprising: a structural frame; a reflective sheet supply reel rotatably mounted in the middle of the structural frame to supply a reflective sheet; a printing unit mounted at the front of the structural frame to print a photoluminescent pattern and a release paper adhesive pattern on the supplied reflective sheet with a viscous reflective liquid; a dryer mounted on the upper part of the structural frame to dry the reflective sheet when the reflective sheet printed with the photoluminescent pattern and the release paper adhesive pattern passes therethrough; a winding reel rotatably mounted in the rear of the structural frame to wind the reflective sheet dried when passing through the dryer in the form of a reel; a release paper supply unit configured to supply release paper to the surface of the reflective sheet printed with the photoluminescent pattern and the release paper adhesive pattern before winding the reflective sheet around the winding reel, so that the release paper and the reflective sheet are wound together in their laminated state; and a plurality of guide rollers mounted between the reflective sheet supply reel, the printing unit, the dryer and the winding reel to guide the reflective sheet, wherein the printing unit includes a rubber roller and a printing roller, the rubber roller and the printing roller are vertically arranged to guide the reflective sheet therebetween when rotating in the direction of their engagement with each other, and the printing unit is configured such that: the printing roller includes a pattern printing groove and a release paper adhesive printing groove formed in its outer peripheral surface, a viscous reflective liquid for printing the photoluminescent pattern is injected into the pattern printing groove, and a viscous reflective liquid for printing the release paper adhesive pattern is injected into the pattern printing groove; a tray for storing the viscous reflective liquid is mounted below the printing roller, so that when a part of the lower side of the printing roller is immersed in the viscous reflective liquid while the printing roller rotates, the viscous reflective liquid is coated on the outer peripheral surface of the printing roller; a cutter having an end in contact with the outer peripheral surface of the printing roller is mounted on one side of the printing roller, so that when the printing roller coated with the viscous reflective liquid rotates, the viscous reflective liquid coated on the outer peripheral surface of the printing roller is removed, so that the viscous reflective liquid remains only in the pattern printing groove and the release paper adhesive printing groove; thus, when the reflective sheet passes between the rubber roller and the printing roller, the viscous reflective liquid remaining in the pattern printing groove and the release paper adhesive printing groove of the printing roller is transferred to the reflective sheet to be printed on the reflective sheet, wherein the release paper supply unit includes: a release paper supply reel configured to supply release paper, and a pair of laminating rollers configured to rotate in the direction of their engagement with each other, so that when the reflective sheet passes between the pair of laminating rollers, the release paper is supplied between the pair of laminating rollers, so that the reflective sheet and the release paper are wound together in their laminated state around the winding reel, and the apparatus further includes: a tension loading element mounted in the part of the structural frame through which the reflective sheet supplied from the reflective sheet supply reel passes to continuously adjust the tension of the supplied reflective sheet;A printing roller mounting device configured to rotatably mount a printing roller in a structural frame; a rubber roller position adjusting device configured to adjust the adhesion degree with the printing roller by adjusting the position of the rubber roller; a tray position adjusting device configured to adjust the height of the tray to control the gap between the tray and the printing roller; a tool operating device configured to adjust the position of a tool such that the tool selectively comes into close contact with the printing roller.

[0015] Preferably, the release paper adhesive printing groove formed in the printing roller has a constant width and includes a first partition member and a second partition member formed parallel to each other at a predetermined interval in the middle of the width direction, so that the release paper adhesive printing groove is divided into a first groove, a second groove and a third groove from the inside, thereby allowing the viscous reflective liquid to be reliably injected into the first groove, the second groove and the third groove respectively without leaving any gaps.

[0016] Preferably, the printing roller mounting devices are respectively mounted on both sides of the structural frame to support both ends of the printing roller, and include: a longitudinal moving rod mounted to penetrate a part of the structural frame at a position corresponding to the printing roller and having a male threaded portion formed on the outer peripheral surface at its rear end portion; a joint integrally formed with the front end of the longitudinal moving rod and having a joint protrusion protruding from its front surface; a support plate fixed to the structural frame such that the longitudinal moving rod penetrates; and a circular plate rotatably coupled to the front surface of the support plate and having a hole formed in the center thereof through which the longitudinal moving rod penetrates and a female threaded portion formed in the hole corresponding to the male threaded portion of the longitudinal moving rod, wherein when the circular plate rotates, the longitudinal moving rod moves forward or backward along the thread; and engagement holes corresponding to the joint protrusions are formed at both ends of the printing roller, so that the printing roller is placed such that the joint protrusion is inserted into the engagement hole, and in this state, the longitudinal moving rod moves forward so that the joint protrusion is inserted into the engagement hole and fixed to the engagement hole.

[0017] Preferably, the rubber roller position adjusting device is respectively installed on both sides of the structural frame to support both ends of the rubber roller, and includes: a pair of moving plate guides fixed to the structural frame at a predetermined interval at positions corresponding to the rubber roller; a vertical moving plate assembled and assembled between the pair of moving plate guides to vertically move along the moving plate guides, and having a shaft insertion hole formed in the middle thereof, into which the shaft of the rubber roller is inserted, wherein the shaft insertion hole is formed to be open in one direction so that the shaft of the rubber roller can be inserted; a cover plate fixed to the surface having an opening communicating with the shaft insertion hole of the vertical moving plate to selectively cover the opening; a pressing bolt fastened to penetrate the cover plate, and the end of the pressing bolt is installed to be in close contact with the shaft of the rubber roller to keep the shaft of the rubber roller from moving along the shaft insertion hole; a vertical rod extending upward from the upper part of the vertical moving plate and having a male threaded portion formed on its outer peripheral surface; a rubber roller worm gear rotatably installed in the structural frame at a position corresponding to the middle of the vertical rod and having a hollow portion, and a female threaded portion threadedly connected to the male threaded portion of the vertical rod is formed in the center of the hollow portion, so that the vertical rod is fastened thereby; a rubber roller worm wheel rotatably installed in the structural frame and meshing with the rubber roller worm gear; and a rubber roller handle configured to rotate the rubber roller worm wheel, and wherein, the shaft of the rubber roller is inserted into the shaft insertion hole of the vertical moving plate and then fixed by the pressing bolt so as not to move, and in this state, when the rubber roller worm wheel is rotated in one direction or the opposite direction by the rubber roller handle, the rubber roller worm wheel rotates, and then the vertical rod moves up and down along the thread, and the vertical moving plate also moves up and down together with the vertical rod to adjust the position of the rubber roller.

[0018] Preferably, the tray position adjusting device is respectively installed on both sides of the structural frame to support both ends of the tray, and includes: a rotating shaft installed to penetrate the structural frame under the tray; a tray worm gear coupled to the outer end of the rotating shaft to rotate together with the rotating shaft; a tray worm wheel installed to mesh with the tray worm gear; a tray handle configured to rotate the tray worm wheel; a planetary gear coupled to the inner end of the rotating shaft to rotate together with the rotating shaft; a lifting rod vertically extending downward from the lower part of the tray and having a rack formed on its outer peripheral surface to mesh with the planetary gear; and a support member fixed to the structural frame to keep the lifting rod from swaying during up and down movement, wherein, when the tray worm wheel is rotated in one direction or the opposite direction by the tray handle, the tray worm gear rotates, and the rotating shaft also rotates, and the planetary gear coupled to the inner end of the rotating shaft rotates, so that the lifting rod moves up and down along the meshing rack to adjust the position of the tray.

[0019] Preferably, the knife operating device includes: a rotating rod that is rotatably assembled to the structural frame before the printing roller, the lower end of the rotating rod protruding downward by penetrating the structural frame, and including: a knife installed on the upper part of the rotating rod at predetermined intervals by being fixed to the rotating rod via a plurality of fixing members to be operated together; and a locking protrusion formed on a part of the lower end, the locking protrusion protruding in a direction perpendicular to the longitudinal direction of the rotating rod; a circular fixing block that is rotatably mounted on the outer side of the structural frame and includes: a rod insertion hole formed in the circular fixing block, the lower end of the rotating rod being inserted into the rod insertion hole; and a locking groove that is locked by locking in one direction The tool worm gear is integrally formed with a portion of the circular fixed block along the outer peripheral surface of the circular fixed block; the tool worm wheel is meshed with the tool worm gear for rotation; and the tool shank is configured to rotate the tool worm wheel, wherein when the tool worm wheel is rotated in one direction or in the opposite direction thereof by the tool shank, the tool worm gear rotates, and the circular fixed block also rotates together, and the rotating rod connected to the circular fixed block by the locking protrusion and the locking groove also rotates together, so that the tool connected to the rotating rod selectively contacts or separates from the outer peripheral surface of the printing roller.

[0020] In the device for manufacturing LED reflective sheets according to the present invention, release paper adhesive printing grooves are integrally formed on both sides of a printing roller having pattern printing grooves formed therein along the outer circumference, so that when a photosensitive pattern is printed on the reflective sheet by the printing roller, the release paper adhesive pattern is also printed, so that during the period when the release paper is attached to the reflective sheet, both ends of the release paper are also adhered to the release paper adhesive pattern, thereby preventing the release paper and the reflective sheet from warping, thereby solving the problem of reduced adhesion due to the inflow of air between the release paper and the reflective sheet, and the reflective sheet can be stored for a long time.

[0021] In addition, since the apparatus for manufacturing an LED reflective sheet according to the present invention has an improved structure for controlling the tension of the sheet and for adjusting the gap between the rubber roller and the printing roller, and an improved structure for adjusting the position of the reflective liquid tray, it is possible to maintain optimal printing conditions when printing a photosensitive pattern and a release paper adhesive pattern on the reflective sheet, and manufacture a reflective sheet of the highest quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description in conjunction with the accompanying drawings, in which:

[0023] Figure 1 FIG. 0 schematically illustrates the configuration of an apparatus for manufacturing an LED reflector according to the present invention;

[0024] Figure 2 FIG. 1 is a front view illustrating a part of a printing roller used in an apparatus for manufacturing an LED reflector according to the present invention;

[0025] Figure 3 FIG. 2 is an enlarged front view illustrating a tension load element applied to the present invention;

[0026] Figure 4 FIG. 3 is a partial cross-sectional view shown for describing a printing roller mounting device applied to the present invention;

[0027] Figure 5 FIG. 4 is a partial front view shown for describing a rubber roller position adjusting device applied to the present invention;

[0028] Figure 6 FIG. 5 is a partial cross-sectional view shown for describing a tray position adjusting device applied to the present invention;

[0029] Figure 7 FIG. 6 is a partial cross-sectional view shown for describing a tool operating device applied to the present invention; and

[0030] Figure 8 FIG. 7 is a front view illustrating a part of a reflector manufactured by an apparatus for manufacturing an LED reflector according to the present invention. DETAILED DESCRIPTION

[0031] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[0032] Referring to Figures 1 to 7, the apparatus for manufacturing an LED reflective sheet according to the present invention includes: a structural frame F; a reflective sheet supply reel 10 rotatably mounted in the middle of the structural frame F to supply a reflective sheet S; a printing unit 20 mounted at the front of the structural frame F to print a photoluminescent pattern H1 and a release paper adhesive pattern H2 on the supplied reflective sheet S with a viscous reflective liquid; a dryer 30 mounted on the upper part of the structural frame F to dry the reflective sheet S when the reflective sheet S printed with the photoluminescent pattern H1 and the release paper adhesive pattern H2 passes therethrough; a winding reel 60 rotatably mounted at the rear of the structural frame F to wind the dried reflective sheet S in the form of a reel when it passes through the dryer 30; a release paper supply unit 70 configured to supply a release paper P to the surface of the reflective sheet printed with the photoluminescent pattern and the release paper adhesive pattern before winding the reflective sheet S around the winding reel 60, such that the release paper P and the reflective sheet S are wound together in a laminated state; and a plurality of guide rollers G mounted between the reflective sheet supply reel 10, the printing unit 20, the dryer 30, and the winding reel 60 to guide the reflective sheet S.

[0033] Here, the printing unit 20 includes a rubber roller 310 and a printing roller 210. The rubber roller 310 and the printing roller 210 are vertically arranged to guide the reflective sheet S therebetween while rotating in a direction in which they engage with each other. And the printing unit 20 is configured such that: the printing roller 210 includes a pattern printing groove 214 filled with a viscous reflective liquid for printing the photoluminescent pattern H1 and a release paper adhesive printing groove 216 filled with a viscous reflective liquid for printing the release paper adhesive pattern H2. The pattern printing groove 214 and the release paper adhesive printing groove 216 are formed in the outer peripheral surface of the printing roller 210; a tray 410 for storing the viscous reflective liquid is mounted below the printing roller 210. Thus, when a part of the lower side of the printing roller 210 is immersed in the viscous reflective liquid and the printing roller 210 rotates, the viscous reflective liquid is coated on the outer peripheral surface of the printing roller 210; a cutter 510 having an end in contact with the outer peripheral surface of the printing roller is mounted on one side of the printing roller 210. Thus, when the printing roller 210 coated with the viscous reflective liquid rotates, the viscous reflective liquid coated on the outer peripheral surface of the printing roller is removed, such that the viscous reflective liquid remains only in the pattern printing groove 214 and the release paper adhesive printing groove 216. Therefore, when the reflective sheet S passes between the rubber roller 310 and the printing roller 210, the viscous reflective liquid remaining in the pattern printing groove 214 and the release paper adhesive printing groove 216 of the printing roller 210 is transferred to the reflective sheet S and printed thereon.

[0034] In addition, preferably, the pattern printing grooves 214 formed in the printing roller 210 are arranged in a grid pattern in a state where a plurality of square grooves are spaced apart from each other at a predetermined interval. However, the pattern printing grooves 214 are not limited to the grid pattern and may be formed in other patterns as needed.

[0035] In addition, the release paper adhesive printing grooves 216 are formed at a predetermined interval from the ends on both sides of the printing roller 210, that is, these grooves are formed in an annular shape along the outer circumferential surface. Specifically, preferably, the release paper adhesive printing grooves 216 applied to the present invention have a constant width and include a first partition 218-1 and a second partition 218-2 formed in parallel with each other at a predetermined interval in the middle of the width direction, so that the release paper adhesive printing grooves 216 are divided into a first groove 216-1, a second groove 216-2, and a third groove 216-3 from the inside, thereby allowing the viscous reflective liquid to be reliably injected into the first groove 216-1, the second groove 216-2, and the third groove 216-3 respectively without leaving any voids. The reason for dividing the release paper adhesive printing grooves 216 into the first groove 216-1, the second groove 216-2, and the third groove 216-3 is to accurately print the release paper adhesive printing grooves 216. That is, if the release paper adhesive printing grooves 216 are not separated but integrally formed as a whole, the width of the release paper adhesive printing grooves 216 is large, so that when filling the viscous reflective liquid, it cannot be filled evenly as a whole. Therefore, there is a phenomenon that the release paper adhesive pattern H2 cannot be accurately printed on the reflective sheet S and the release paper adhesive pattern H2 is partially formed. However, the present invention has the effect of improving this problem due to the above structure.

[0036] In addition, the release paper adhesive printing grooves 216 may be configured to have a depth that becomes shallower from the inner first groove 216-1 toward the third groove 216-3. Then, the viscous reflective liquid to be filled is formed to have a thickness that becomes thinner from the first groove 216-1 toward the third groove 216-3, the portion of the release paper adhesive pattern H2 to be printed on the reflective sheet S corresponding to the first groove 216-1 is printed thickest, and the portion corresponding to the third groove 216-3 is printed thinnest. In this case, excellent adhesion is maintained, and when the release paper P is removed from the reflective sheet S, the adhesion of the outer portion corresponding to the third groove 216-3 is weak, so that the portions corresponding to the third groove 216-3, the second groove 216-2, and the first groove 216-1 are gradually peeled off, thus demonstrating the effect of facilitating the smooth separation of the release paper.

[0037] Next, the release paper supply unit 70 includes a release paper supply reel 72 configured to supply release paper, and a pair of laminating rollers 74 configured to rotate in a direction in which they engage with each other. Accordingly, when the reflective sheet S passes between the pair of laminating rollers 74, the release paper P is supplied between the pair of laminating rollers 74 so that the reflective sheet S and the release paper P are wound together on the winding reel 60 in a state where they are laminated.

[0038] In addition to the dryer 30, a cooler 40 and an auxiliary dryer 50 are also installed on the upper portion of the structural frame F so that the reflective sheet S passing through the upper portion of the structural frame is primarily dried by heating in the dryer 30, cooled by the cooler 40, and then secondarily dried by the auxiliary dryer 50. Of course, products known in the art can be applied to the dryer 30, the cooler 40, and the auxiliary dryer 50, and thus will not be described in detail.

[0039] Next, preferably, a tension load element 100 is installed in a portion of the structural frame through which the reflective sheet S supplied from the reflective sheet supply reel 10 passes, and the tension load element 100 is configured to continuously adjust the tension of the supplied reflective sheet S.

[0040] As Figure 3 shown, the tension load element 100 applied to the present invention includes: a moving portion 120 installed on the upper portion of the main body 110 to slightly move according to a signal received from a sensor portion (not shown) configured to detect the tension of the reflective sheet S moving back and forth; a bearing housing 140 installed on the upper surface of the moving portion 120; and a tension adjustment roller 130 installed in the bearing housing 140 so that the reflective sheet S is guided to the printing unit 20 through the tension adjustment roller 130.

[0041] Accordingly, when the reflective sheet S supplied from the reflective sheet supply reel 10 is guided to the printing unit 20 through the tension adjustment roller 130, the size of the reflective sheet supply reel 10 continuously decreases. In this case, the sensor portion engaged with the tension adjustment roller 130 detects the tension of the reflective sheet S to automatically and slightly adjust the position of the moving portion 120, as Figure 3 shown by the dashed line in, so that the reflective sheet S can always be supplied to the printing unit 20 with a constant tension.

[0042] In addition, the device of the present invention further includes: a printing roller mounting device 200 configured to rotatably mount a printing roller 210 in a structural frame F; a rubber roller position adjusting device 300 configured to adjust the adhesion degree with the printing roller 210 by adjusting the position of a rubber roller 310; a tray position adjusting device 400 configured to adjust the height of a tray 410 to control the gap between the tray 410 and the printing roller 210; and a cutter operating device 500 configured to adjust the position of a cutter 510 such that the cutter 510 selectively comes into close contact with the printing roller 210.

[0043] First, the printing roller mounting devices 200 are respectively mounted on both sides of the structural frame F to support both ends of the printing roller 210, and include: a longitudinal moving rod 220 mounted to penetrate a part of the structural frame F at a position corresponding to the printing roller 210, and having a male threaded portion formed on an outer circumferential surface at its rear end portion; a joint member 250 integrally formed with a front end of the longitudinal moving rod 220 and having a joint member protrusion 252 protruding from its front surface; a support plate 230 fixed to the structural frame F such that the longitudinal moving rod 220 penetrates; and a circular plate 240 rotatably coupled to a front surface of the support plate 230 and having a hole formed in a center thereof through which the longitudinal moving rod 220 penetrates and a female threaded portion formed in the hole corresponding to the male threaded portion of the longitudinal moving rod 220. Therefore, when the circular plate 240 rotates, the longitudinal moving rod 220 will move forward or backward along the threads of the male threaded portion and the female threaded portion.

[0044] In order to mount the printing roller 210 through the printing roller mounting device 200, the printing roller 210 can be placed at a position corresponding to the longitudinal moving rod 220, and then the circular plate 240 is rotated to move the longitudinal moving rod 220 forward. For this purpose, engagement holes 212 corresponding to the joint member protrusions 252 are formed at both ends of the printing roller 210. The printing roller 210 is placed such that the joint member protrusions 252 are inserted into the engagement holes 212, and in this state, the longitudinal moving rod 220 moves forward to fix the joint member protrusions 252 in a manner of being inserted into the engagement holes 212.

[0045] Next, the rubber roller position adjusting device 300 is respectively installed on both sides of the structural frame F to support both ends of the rubber roller 310, and includes: a pair of moving plate guides 320 fixedly attached to the structural frame F at a predetermined interval at positions corresponding to the rubber roller 310; a vertical moving plate 330 assembled and assembled between the pair of moving plate guides 320 to vertically move along the moving plate guides 320, and having a shaft insertion hole 332 formed in the middle thereof, into which the shaft 312 of the rubber roller 310 is inserted, wherein the shaft insertion hole 332 is formed to be open in one direction so that the shaft 312 of the rubber roller 310 can be inserted; a cover plate 340 fixed to a surface having an opening communicating with the shaft insertion hole 332 of the vertical moving plate 330 to selectively cover the opening; a pressing bolt 342 fastened to penetrate the cover plate 340, and the end thereof is installed to be in close contact with the shaft of the rubber roller 310 to keep the shaft 312 of the rubber roller 310 from moving along the shaft insertion hole 332; a vertical rod 350 extending upward from the upper part of the vertical moving plate 330 and having a male thread portion formed on its outer peripheral surface; a rubber roller worm gear 360 rotatably installed in the structural frame F at a position corresponding to the middle of the vertical rod 350 and having a hollow portion, and a female thread portion threadedly connected to the male thread portion of the vertical rod is formed in the center of the hollow portion, so that the vertical rod 350 is fastened thereby; a rubber roller worm wheel 370 rotatably installed in the structural frame F and meshing with the rubber roller worm gear 360; and a rubber roller handle portion 380 configured to rotate the rubber roller worm wheel 370.

[0046] Therefore, in order to install the rubber roller 310 on the vertical moving plate 330, the shaft of the rubber roller 310 can be inserted into the shaft insertion hole 332 of the vertical moving plate 330, and then fixed by pressing with the pressing bolt 342 so that it does not move. In order to adjust the vertical position of the rubber roller 310, when the rubber roller worm wheel 370 is rotated in one direction or the opposite direction by the rubber roller handle portion 380, the rubber roller worm gear 360 rotates, and then the vertical rod 350 moves up and down along the thread, and the vertical moving plate 330 also moves up and down together with the vertical rod 350 to adjust the position of the rubber roller 310.

[0047] Next, the tray position adjusting device 400 is respectively installed on both sides of the structural frame F to support both ends of the tray 410, and includes: a rotating shaft 420 installed to penetrate the structural frame F below the tray 410; a tray worm gear 430 coupled to the outer end (i.e., Figure 6 the right end inFigure 6 at the left end of [], and rotates together with the rotating shaft 420; a lifting rod 470 that extends vertically downward from the lower part of the tray 410 and has a rack 472 formed on its outer peripheral surface to engage with the planetary gear 460; and a support 480 that is fixed to the structural frame F to keep the lifting rod 470 from wobbling during up and down movement.

[0048] Therefore, in order to adjust the vertical position of the tray 410, the tray worm gear 440 can be rotated in one direction or the opposite direction through the tray handle 450. Then, as the tray worm gear 430 rotates, the rotating shaft 420 also rotates, and the planetary gear 460 connected to the inner end of the rotating shaft 420 rotates, so that the lifting rod 470 moves up and down along the engaged rack 472, and then the tray 410 also moves up and down together with the lifting rod 470 to adjust its position.

[0049] Next, the tool operating device 500 includes: a rotating rod 520 that is rotatably assembled to the structural frame F before the printing roller 210, and its lower end protrudes outward (i.e., Figure 7 downward in []) through the structural frame F, and includes a tool 510 that is installed at a predetermined interval on the upper part of the rotating rod 520 by being fixed to the tool rotating rod 520 via a plurality of fixing members 512 to be operated together; and a locking protrusion 522 that is formed on a part of the lower end and protrudes in a direction perpendicular to the longitudinal direction of the rotating rod 520; a circular fixing block 530 that is rotatably installed on the outside of the structural frame F and includes a rod insertion hole 532 formed in the circular fixing block 530 and a locking groove 534 formed by penetrating in one direction in the part that defines the rod insertion hole 532, the lower end of the rotating rod 520 is inserted into the rod insertion hole 532, and the locking protrusion 522 of the rotating rod 520 is inserted into and connected through the locking groove 534; a tool worm gear 540 that is integrally formed with a part of the circular fixing block 530 along its outer peripheral surface; a tool worm wheel 550 that meshes with the tool worm gear 540 to rotate; and a tool handle 560 that is configured to rotate the tool worm wheel 550.

[0050] Therefore, in order to adjust the position of the tool 510, when the tool worm wheel 550 is rotated in one direction or the opposite direction through the tool handle 560, the tool worm gear 540 rotates, and the circular fixing block 530 also rotates together. The rotating rod 520 connected to the circular fixing block 530 through the locking protrusion 522 and the locking groove 534 also rotates together, so that the tool connected to the rotating rod 520 selectively contacts or separates from the outer peripheral surface of the printing roller 210.

[0051] In addition, each of the reflector sheet supply reel 10, the printing roller 210, the release paper supply reel 72, and the winding reel 60 installed in the device of the present invention is configured to rotate by power received from a motor via a power transmission device. As a power transmission method, a conventional chain method and a sprocket method can be applied to the present invention.

[0052] Now, the operation and effects of the device for manufacturing an LED reflector sheet according to the present invention configured as described above will be described.

[0053] In the device for manufacturing an LED reflector sheet according to the present invention, the reflector sheet S supplied from the reflector sheet supply reel 10 passes through the printing unit 20 constituted by the rubber roller 310 and the printing roller 210, and during this process, the photopattern H1 and the release paper adhesive pattern H2 are printed on the surface of the reflector sheet S, as Figure 8 shown.

[0054] That is, a tray 410 for storing a viscous reflective liquid is installed below the printing roller 210, and when the printing roller 210 rotates while the lower side portion of the printing roller 210 is immersed in the viscous reflective liquid, the viscous reflective liquid is coated on the outer peripheral surface of the printing roller 210. In addition, the viscous reflective liquid coated on the outer peripheral surface of the printing roller is removed by the cutter 510, so that the viscous reflective liquid remains only in the pattern printing grooves 214 and the release paper adhesive printing grooves 216. In this state, as the printing roller 210 rotates, the viscous reflective liquid remaining in the pattern printing grooves 214 and the release paper adhesive printing grooves 216 of the printing roller 210 is transferred to the reflector sheet S passing between the rubber roller 310 and the printing roller and printed thereon.

[0055] When the photopattern H1 and the release paper adhesive pattern H2 are printed on the reflector sheet S as described above, the reflector sheet is dried while passing through the dryer 30 and then wound around the winding reel 60 to be discharged. At this time, the reflector sheet S passes through a pair of laminating rollers 74 to be laminated with the release paper P, and is wound around the winding reel 60 in a laminated state.

[0056] That is, when the release paper P is supplied from the release paper supply reel 72 to a pair of laminating rollers 74 rotating in a direction in which they mesh with each other, the reflector sheet S and the release paper P are laminated while passing through between the laminating rollers 74 and wound around the winding reel 60. Then, when the release paper P is laminated to the reflector sheet S, it adheres to the photopattern H1 and the release paper adhesive pattern H2 formed on the reflector sheet S to maintain the laminated state.

[0057] When manufacturing the reflective sheet S in this manner, the present invention has the following advantages: By continuously adjusting the tension of the reflective sheet S through the tension load element 100, printing can be performed in a tensioned state; the printing roller 210 can be installed and replaced through the printing roller mounting device 200; the position of the rubber roller 310 can be adjusted through the rubber roller position adjusting device 300 to control the degree of adhesion to the printing roller 210; the height of the tray 410 can be adjusted through the tray position adjusting device 400 to control the gap between it and the printing roller 210. Of course, only when the printing work is performed through the tool operating device 500, the tool 510 is in close contact with the printing roller 210.

[0058] As Figure 8 shown, the LED reflective sheet manufactured in this manner is characterized in that when printing the photopattern H1 on the reflective sheet S through the printing roller 210, the release paper adhesive pattern H2 is also printed, and during the attachment of the release paper P to the reflective sheet S, both ends of the release paper P adhere to the release paper adhesive pattern H2, so there will be no warping phenomenon between the release paper P and the reflective sheet S, thus solving the problem of reduced adhesion caused by air flowing in between the release paper and the reflective sheet, and the reflective sheet can be stored for a long time.

[0059] Thus, the present invention has been illustrated and described in conjunction with specific embodiments, but anyone skilled in the art will be able to easily understand that various modifications and substitutions can be made without departing from the spirit and scope of the present invention as represented by the claims.

[0060] Cross-reference to related applications

[0061] This application claims the priority of Korean Patent Application No. 10-2024-0011814, filed on January 25, 2024, the entire content of which is incorporated herein by reference.

[0062]

List of reference numerals

[0063] 10: Reflective sheet supply reel

[0064] 20: Printing unit

[0065] 30: Dryer

[0066] 40: Cooler

[0067] 50: Auxiliary dryer

[0068] 60: Winding reel

[0069] 70: Release paper supply unit

[0070] 72: Release paper supply reel

[0071] 74: Laminating roller

[0072] 100: Tension load element

[0073] 200: Printing roller mounting device

[0074] 210: Printing roller

[0075] 214: Pattern printing groove

[0076] 216: Release paper adhesive printing groove

[0077] 300: Rubber roller position adjustment device

[0078] 310: Rubber roller

[0079] 400: Tray position adjustment device

[0080] 410: Tray

[0081] 500: Tool operating device

[0082] 510: Tool

[0083] F: Structural frame

[0084] H1: Photo pattern

[0085] H2: Release paper adhesive pattern

[0086] P: Release paper

[0087] S: Reflective sheet

Claims

1. An apparatus for manufacturing an LED reflective sheet, the apparatus comprising: A structural frame; A reflective sheet supply reel, which is rotatably mounted in the middle of the structural frame to supply the reflective sheet; A printing unit, which is mounted at the front of the structural frame to print a photoluminescent pattern and a release paper adhesive pattern on the supplied reflective sheet with a viscous reflective liquid; A dryer, which is mounted on the upper part of the structural frame to dry the reflective sheet when the reflective sheet printed with the photoluminescent pattern and the release paper adhesive pattern passes through; A winding reel, which is rotatably mounted in the rear of the structural frame to wind the reflective sheet dried when passing through the dryer in the form of a reel; A release paper supply unit, which is configured to supply release paper to the surface of the reflective sheet printed with the photoluminescent pattern and the release paper adhesive pattern before winding the reflective sheet on the winding reel, so that the release paper and the reflective sheet are wound together in their laminated state; and A plurality of guide rollers, which are mounted between the reflective sheet supply reel, the printing unit, the dryer and the winding reel to guide the reflective sheet, Wherein, the printing unit includes a rubber roller and a printing roller, the rubber roller and the printing roller are vertically arranged to guide the reflective sheet therebetween when rotating in the direction of their engagement with each other, and the printing unit is configured such that: the printing roller includes a pattern printing groove and a release paper adhesive printing groove formed in the outer peripheral surface of the printing roller, a viscous reflective liquid for printing the photoluminescent pattern is injected into the pattern printing groove, and the viscous reflective liquid for printing the release paper adhesive pattern is injected into the pattern printing groove; A tray for storing the viscous reflective liquid is mounted below the printing roller, so that when a part of the lower side of the printing roller is immersed in the viscous reflective liquid while the printing roller rotates, the viscous reflective liquid is coated on the outer peripheral surface of the printing roller; A cutter having an end in contact with the outer peripheral surface of the printing roller is mounted on one side of the printing roller, so that when the printing roller coated with the viscous reflective liquid rotates, the viscous reflective liquid coated on the outer peripheral surface of the printing roller is removed, so that the viscous reflective liquid only remains in the pattern printing groove and the release paper adhesive printing groove; Therefore, when the reflective sheet passes between the rubber roller and the printing roller, the viscous reflective liquid remaining in the pattern printing groove and the release paper adhesive printing groove of the printing roller is transferred to the reflective sheet to be printed on the reflective sheet, Among them, the release paper supply unit includes: a release paper supply reel configured to supply release paper, and a pair of lamination rollers configured to rotate in a direction in which they are joined to each other. Thus, when the reflective sheet passes between the pair of lamination rollers, the release paper is supplied between the pair of lamination rollers, so that the reflective sheet and the release paper are wound together on the winding reel in a laminated state, and The device further includes: A tension load element installed in a portion of the structural frame through which the reflective sheet supplied from the reflective sheet supply reel passes to continuously adjust the tension of the supplied reflective sheet; A printing roller mounting device configured to rotatably mount the printing roller in the structural frame; A rubber roller position adjusting device configured to adjust the adhesion degree with the printing roller by adjusting the position of the rubber roller, A tray position adjusting device configured to adjust the height of the tray to control the gap between the tray and the printing roller; A tool operating device configured to adjust the position of the tool so that the tool selectively comes into close contact with the printing roller.

2. The device for manufacturing an LED reflective sheet according to claim 1, The release paper adhesive printing groove formed in the printing roller has a constant width and includes a first partition and a second partition formed parallel to each other at a predetermined interval in the middle of the width direction, so that the release paper adhesive printing groove is divided into a first groove, a second groove, and a third groove from the inside, thereby allowing the viscous reflective liquid to be reliably injected into the first groove, the second groove, and the third groove respectively without leaving any gaps.

3. The device for manufacturing an LED reflective sheet according to claim 1, The printing roller mounting devices are respectively installed on both sides of the structural frame to support both ends of the printing roller, and the printing roller mounting device includes: A longitudinal moving rod installed to penetrate a part of the structural frame at a position corresponding to the printing roller, and having a male threaded portion formed on the outer peripheral surface of the rear end portion of the longitudinal moving rod; A joint integrally formed with the front end of the longitudinal moving rod and having a joint protrusion protruding from the front surface of the joint; A support plate fixed to the structural frame so that the longitudinal moving rod penetrates through; And A circular plate rotatably coupled to the front surface of the support plate and having a hole formed in the center of the circular plate through which the longitudinal moving rod passes and a female threaded portion formed in the hole corresponding to the male threaded portion of the longitudinal moving rod, Wherein, when the circular plate rotates, the longitudinal moving rod moves forward or backward along the thread; and engaging holes corresponding to the engaging piece protrusions are formed at both ends of the printing roller, so that the printing roller is placed such that the engaging piece protrusions are inserted into the engaging holes, and in this state, the longitudinal moving rod moves forward to insert the engaging piece protrusions into the engaging holes and fix them to the engaging holes.

4. The apparatus for manufacturing an LED reflective sheet according to claim 1, Among them, The rubber roller position adjusting device is respectively installed on both sides of the structural frame to support both ends of the rubber roller, and the rubber roller position adjusting device includes: A pair of moving plate guides, which are fixed to the structural frame at a predetermined interval at positions corresponding to the rubber roller; A vertical moving plate, which is assembled and assembled between the pair of moving plate guides to move vertically along the moving plate guides, and has a shaft insertion hole formed in the middle of the vertical moving plate, and the shaft of the rubber roller is inserted into the shaft insertion hole, wherein the shaft insertion hole is formed to be open in one direction so that the shaft of the rubber roller can be inserted; A cover plate, which is fixed to the surface having an opening communicating with the shaft insertion hole of the vertical moving plate, so as to selectively cover the opening; A compression bolt, which is fastened to penetrate the cover plate, and the end of the compression bolt is installed in close contact with the shaft of the rubber roller to keep the shaft of the rubber roller from moving along the shaft insertion hole; A vertical rod, which extends upward from the upper part of the vertical moving plate, and has a male thread portion formed on the outer peripheral surface of the vertical rod; A rubber roller worm gear, which is rotatably installed in the structural frame at a position corresponding to the middle of the vertical rod, and has a hollow portion, and a female thread portion threadedly connected to the male thread portion of the vertical rod is formed in the center of the hollow portion, so that the vertical rod is fastened thereby; A rubber roller worm, which is rotatably installed in the structural frame and meshes with the rubber roller worm gear; and A rubber roller handle, which is configured to rotate the rubber roller worm, and Wherein, the shaft of the rubber roller is inserted into the shaft insertion hole of the vertical moving plate and then fixed by the compression bolt so as not to move, and in this state, when the rubber roller worm is rotated in one direction or in a direction opposite to the one direction by the rubber roller handle, the rubber roller worm rotates, and then the vertical rod moves up and down along the thread, and the vertical moving plate also moves up and down together with the vertical rod to adjust the position of the rubber roller.

5. The apparatus for manufacturing an LED reflective sheet according to claim 1, Among them, The tray position adjusting device is respectively installed on both sides of the structural frame to support both ends of the tray, and the tray position adjusting device includes: A rotating shaft, which is installed to penetrate the structural frame under the tray; A tray worm gear, which is connected to the outer end of the rotating shaft and rotates together with the rotating shaft; A tray worm wheel, which is installed to mesh with the tray worm gear; A tray handle, which is configured to rotate the tray worm wheel; A planetary gear, which is connected to the inner end of the rotating shaft and rotates together with the rotating shaft; A lifting rod, which extends vertically downward from the lower part of the tray and has a rack formed on the outer peripheral surface of the lifting rod to mesh with the planetary gear; and A support member, which is fixed to the structural frame to keep the lifting rod from wobbling during up and down movement, wherein when the tray worm wheel rotates in one direction or in the direction opposite to the one direction through the tray handle, the tray worm gear rotates, and the rotating shaft also rotates, and the planetary gear connected to the inner end of the rotating shaft rotates, so that the lifting rod moves up and down along the meshing rack to adjust the position of the tray.

6. The apparatus for manufacturing an LED reflector according to claim 1, The tool operating device includes: A rotating rod, which is rotatably assembled to the structural frame before the printing roller, the lower end of the rotating rod protrudes downward through the structural frame, and includes: a tool, which is installed on the upper part of the rotating rod at a predetermined interval by being fixed to the rotating rod through a plurality of fixing members to be operated together; and a locking protrusion, which is formed on a part of the lower end, and the locking protrusion protrudes in a direction perpendicular to the longitudinal direction of the rotating rod; A circular fixing block, which is rotatably installed on the outside of the structural frame, and the circular fixing block includes: a rod insertion hole formed in the circular fixing block, the lower end of the rotating rod is inserted into the rod insertion hole; and a locking groove, which is formed by penetrating in one direction in a part of the circular fixing block defining the rod insertion hole, and the locking protrusion of the rotating rod is inserted and connected through the locking groove; A tool worm gear, which is integrally formed with a part of the circular fixing block along the outer peripheral surface of the circular fixing block; A tool worm wheel, which meshes with the tool worm gear to rotate; and A tool handle, which is configured to rotate the tool worm wheel, wherein when the tool worm wheel rotates in one direction or in the direction opposite to the one direction through the tool handle, the tool worm gear rotates, and the circular fixing block also rotates together, and the rotating rod connected to the circular fixing block through the locking protrusion and the locking groove also rotates together, so that the tool connected to the rotating rod selectively contacts or separates from the outer peripheral surface of the printing roller.

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