Gauze-stretched plate finishing device

Abstract

[Solution] The mesh-covered plate finishing device 1 according to the present invention is a device for removing excess mesh s3 from the outer edge of a semi-finished mesh-covered plate S1 that is stretched with mesh to protrude to the outside of a rectangular frame s1, and comprises a stage 9 on which the semi-finished mesh-covered plate S1 is placed, and a movable grinding unit 17, wherein the movable grinding unit 17 comprises a rotating grinding section 19 equipped with a detachable grinding tool 20 at its tip for cutting off excess mesh s3 while rotating, a grinding base section 18 equipped with a biasing section 21 for biasing the rotating grinding section 19 upward, and a grinding moving section 56 formed to allow parallel movement of the grinding base section 18 along one side of the semi-finished mesh-covered plate S1 placed on the stage 9.

Description

Technical Field

[0001] The present invention relates to a stretched screen finishing apparatus for removing excess portions of screen exposed outside the frame of a stretched screen.

Background Art

[0002] Screen printing uses a stretched screen, which is formed by forming a photosensitive layer having openings corresponding to a printing pattern on a screen stretched on a frame (hereinafter referred to as "screen"), and transfers solder resist made of cream solder or ink to a substrate with a squeegee. This method is used in a wide range of fields, from forming circuit patterns for electronic components to decorative printing on clothing.

[0003] Generally, when manufacturing a stretched screen, first, a screen woven from synthetic resin fibers such as polyester and nylon or metal fibers such as stainless steel is attached to a hollow or solid frame made of aluminum or the like using a strong adhesive or the like while maintaining a predetermined tension. Thereafter, a photosensitive emulsion is applied to the surface of the screen or a photosensitive film is attached, and a desired printing pattern is formed through exposure and development processes.

[0004] In addition, in order to stretch the screen on the frame while maintaining a predetermined tension, the screen protruding outward from the frame is pulled from four sides, and an adhesive is applied (or other physical fixation is performed) to the upper surface of the screen in contact with the frame to fix it to the frame. At this time, excess screen greatly protruding outside the frame exists, and there is also a concern that the adhesive may protrude from the frame.

[0005] When the stretched screen is used on an automatic conveying line, the excess screen and the protruding adhesive may cause the exposed fibers to interfere with sensors or get caught on other equipment, and when positioning the stretched screen, the relevant portion may interfere, causing positional deviation from the reference and leading to a decrease in printing accuracy. In addition, fibers at the exposed portion may fray and fall off, causing foreign matter defects in the printing process.

[0006] Furthermore, in the formation of circuit patterns for electronic components, the resolution accuracy of the mesh openings is critical, and therefore, metal mesh that can be printed with high precision is used. In this case, there is a risk that cut edges or exposed fibers may injure the worker's fingers, so it is common practice for workers to remove excess mesh manually beforehand using a utility knife or scissors, as described in Patent Document 1, for example.

[0007] Furthermore, in the case of decorative printing on clothing, synthetic resin fibers such as polyester are mainly used as the material for the mesh, and in this case as well, it is common for workers to remove the excess mesh manually using a utility knife or scissors. However, instead of simply using a utility knife, a technique is disclosed in Patent Document 2 in which the mesh is cut and removed by guiding a cutter blade heated by an electric iron into a cutter groove of the frame. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Patent Publication No. 09-300840 [Patent Document 2] Japanese Patent Publication No. 09-216337 [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] The technology described in Patent Document 1 still generally relies on manual removal by workers using utility knives or the like. In particular, the adhesive that has hardened and spilled out of the frame is very strong, requiring strong force to be used, making it a dangerous operation. Furthermore, it also has problems such as unnecessarily removing too much of the frame.

[0010] Furthermore, the technology described in Patent Document 2 is superior to using a simple utility knife or scissors because it targets a mesh made of synthetic resin fibers, which is intended for decorative printing on clothing and the like. This is because a heated cutter blade can be guided into the cutter groove of the frame to cut and remove the material.

[0011] However, since all of these methods involve manual removal, they are dangerous and inefficient. Furthermore, even heated cutter blades cannot be used on mesh-covered plates used for forming circuit patterns on electronic components, etc., which use metal mesh.

[0012] Furthermore, manual removal presents challenges such as damaging the frame surface and resulting in uneven cut surfaces. In recent years, coupled with labor shortages, there has been a strong demand for automation as a safe, simple, and precise method for removing excess mesh.

[0013] This invention has been made in view of the above circumstances, and aims to provide a mesh-covered board finishing device that automatically removes the excess portion exposed outside the frame of a semi-finished mesh-covered board that has been patterned by stretching mesh over a frame. [Means for solving the problem]

[0014] To achieve the above objectives, the present invention provides the following:

[0015] The invention according to claim 1 provides a device for removing excess mesh from the outer edge of a semi-finished mesh-covered plate that is stretched over a rectangular frame, comprising a stage on which the semi-finished mesh-covered plate is placed, and a movable grinding unit, wherein the movable grinding unit comprises a rotating grinding section having a detachable grinding tool at its tip for cutting off the excess mesh while rotating, a grinding base section having a biasing section for biasing the rotating grinding section upward, and a grinding moving section formed to allow parallel movement of the grinding base section along one side of the semi-finished mesh-covered plate placed on the stage.

[0016] The invention according to claim 2 provides a mesh-stretching plate finishing apparatus according to claim 1, characterized in that the upward biasing force of the biasing portion is variably formed, and a blow portion is formed to discharge gas toward the grinding tool.

[0017] The invention according to claim 3 provides a screen-stretching plate finishing apparatus according to claim 2, characterized in that the grinding base has a horizontal variable part that allows the grinding angle by the rotary grinding part to be varied horizontally and a vertical variable part that allows it to be varied vertically.

[0018] The invention according to claim 4 provides a screen-stretching plate finishing device according to claim 3, characterized in that a retractable section is formed that allows the rotating grinding section to move downward against the biasing force of the biasing section.

[0019] The invention according to claim 5 provides a mesh-covered plate finishing apparatus according to claim 4, characterized in that at least two of the mobile grinding units are arranged toward two opposing sides of the semi-finished mesh-covered plate placed on the stage.

[0020] The invention according to claim 6 provides a screen-stretching plate finishing apparatus according to any one of claims 1 to 5, characterized in that a screen-stretching plate holding rotational vertical unit is formed, comprising: a positioning and holding part formed to be able to move back and forth toward the diagonal inside of the frame of the semi-finished screen-stretching plate placed on the stage; a rotating part that makes the positioning and holding part rotatable; and a vertical movement part formed to make the positioning and holding part and the rotating part able to move up and down. [Effects of the Invention]

[0021] According to the invention described in claim 1, the apparatus for removing excess mesh from the outer edge of a semi-finished mesh-covered plate that is stretched over a rectangular frame is comprising a stage on which the semi-finished mesh-covered plate is placed, and a movable grinding unit, wherein the movable grinding unit comprises a rotating grinding section with a detachable grinding tool at its tip for cutting off excess mesh while rotating, a grinding base section having a biasing section for biasing the rotating grinding section upward, and a grinding movement section formed to allow parallel movement of the grinding base section along one side of the semi-finished mesh-covered plate placed on the stage, so that the excess mesh and hardened adhesive that protrudes from the frame on one side of the semi-finished mesh-covered plate can be automatically cut off by the grinding base section moving between the ends of the frame, thus enabling safe, simple, and precise removal work.

[0022] According to the invention of claim 2, the upward urging force of the urging portion is configured to be freely variable, and a blowing portion that discharges gas toward the grinding tool is provided, whereby the influence of cutting by the grinding tool on the frame can be suppressed, and fine cut gauze fibers, adhesive residue and the like can be removed.

[0023] According to the invention of claim 3, the grinding base portion is provided with a horizontal variable portion that allows the grinding angle of the rotary grinding portion to be freely varied in the horizontal direction and a vertical variable portion that allows the grinding angle to be freely varied in the vertical direction, whereby optimal cutting conditions can be adjusted according to the size of the supplied stretched screen, the material of the gauze, the adhesion state and the like, so that versatility can be improved.

[0024] According to the invention of claim 4, a retracting portion that allows the rotary grinding portion to freely move downward against the urging force of the urging portion is provided, whereby the rotary grinding portion can be configured so as not to interfere with placement of a semi-finished stretched screen on the stage or get in the way during non-cutting operations such as replacement of a grinding tool, so that damage to the device can be prevented and workability can be improved.

[0025] According to the invention of claim 5, at least two movable grinding units are respectively disposed facing two opposite sides of the semi-finished stretched screen placed on the stage, whereby excess gauze on two sides can be removed at the same time, so that workability can be greatly improved.

[0026] According to the invention of claim 6, a screen holding, rotating and vertical moving unit is formed, which comprises: a positioning and holding portion configured to be freely movable forward and backward toward an opposite inner corner of a frame of a semi-finished stretched screen placed on the stage; a rotating portion that allows the positioning and holding portion to freely rotate; and a vertical moving portion that allows the positioning and holding portion and the rotating portion to freely move vertically. Accordingly, not only can the semi-finished stretched screen be held during cutting, but the side of the semi-finished stretched screen from which gauze is to be removed can be automatically changed, so that particularly efficient operation can be achieved in a configuration where multiple sides are cut simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] [Figure 1] This is a perspective view of the screen-stretching plate finishing apparatus according to this embodiment. [Figure 2] This is a perspective view showing a semi-finished mesh-covered plate and positioning / holding mechanism to be placed on the stage. [Figure 3] (a) is an explanatory diagram showing the process of removing excess mesh from a semi-finished mesh-covered board, (b) is a cross-sectional view of line AA shown in Figure 2 showing the result after the excess mesh has been removed, and (c) is a cross-sectional view of line AA shown in Figure 2 showing a mesh-covered board of a different frame shape after the excess mesh has been removed. [Figure 4] This is a simplified front view of Figure 1, showing the periphery of the mobile grinding unit. [Figure 5] Figure 4 is a simplified plan view. [Figure 6] This is a rear perspective view of the mobile grinding unit. [Figure 7] This is a front perspective view of the mobile grinding unit. [Figure 8] (a) is a front view diagram showing the application and angle of the grinding tool of the rotary grinding unit to a semi-finished mesh-covered plate, and (b) is a plan view diagram showing the origin position and angle of the grinding tool of the rotary grinding unit to the semi-finished mesh-covered plate before cutting. [Figure 9] (a) is a simplified plan view showing the direction in which the rotary grinding section moves at the origin position, and (b) is a simplified plan view showing how the rotary grinding section moves and removes excess mesh. [Figure 10] (a) is a simplified plan view showing the semi-finished mesh-covered board of Figure 9(b) after being rotated 90°, and also showing the direction in which the rotating grinding unit moves at the origin position. (b) is a simplified plan view showing the state after the rotating grinding unit has moved and all the excess mesh has been removed. [Modes for carrying out the invention]

[0028] The gist of the mesh-covered plate finishing device according to the present invention is a device for removing excess mesh from the outer edge of a semi-finished mesh-covered plate that has been stretched over a rectangular frame and protruding to the outside of the frame, and comprises a stage on which the semi-finished mesh-covered plate is placed and a movable grinding unit, wherein the movable grinding unit comprises a grinding base equipped with a rotary grinding section at its tip that has a detachable grinding tool for cutting off excess mesh while rotating and a biasing section that biases the rotary grinding section upward and a grinding movable section formed to be able to move parallel to one side of the semi-finished mesh-covered plate placed on the stage. In other words, the aim is to provide a mesh-covered plate finishing device that can automatically remove the excess portion exposed outside the frame of a semi-finished mesh-covered plate that has been patterned by stretching mesh over a frame.

[0029] Hereinafter, an embodiment of the screen-stretching plate finishing apparatus according to the present invention will be described with reference to the drawings. In this description, structures and parts that are identical or symmetrical on both sides will, in principle, be denoted by the same reference numerals, and only one side will be described, while the other side will be omitted as appropriate.

[0030] Furthermore, in this explanation, front, back, left, and right refer to the front side of the screen-stretching plate finishing device 1 shown in Figure 1 as front, the back side as rear, the left side as left, and the right side as right. Inward refers to the direction toward the center of the device where the stage 9 is located, and outward refers to the direction toward the outside of the device.

[0031] The mesh-covered plate S to be processed by the mesh-covered plate finishing apparatus 1 of the present invention is a hollow or solid frame s1 made of aluminum or the like, to which a mesh s2 woven from synthetic resin fibers such as polyester or nylon, or metal fibers such as stainless steel, is connected by adhesive or other means. The shape of the frame s1 may be a simple rectangle as shown in Figure 3(b), which is shown in the cross-sectional view indicated by line AA in Figure 2, or it may be formed with steps as shown in Figure 3(c). Various shapes of mesh-covered plates S can be targeted within the scope of the gist of the present invention.

[0032] As shown in Figure 2, the mesh-covered plate finishing apparatus 1 shown in Figure 1, according to an embodiment of the present invention, is an apparatus for removing excess mesh s3 from the outer edge of a semi-finished mesh-covered plate S1 that is stretched with mesh to protrude outside a rectangular frame s1, as shown in Figure 3(a). As shown in Figures 2 and 4, it consists of a stage 9 on which the semi-finished mesh-covered plate S1 is placed, and a movable grinding unit 17. As shown in Figures 6 and 7, the movable grinding unit 17 consists of a rotating grinding section 19 equipped with a detachable grinding tool 20 at its tip for cutting off excess mesh s3 while rotating, a grinding base section 18 equipped with a biasing section 21 that biases the rotating grinding section 19 upward, and a grinding moving section 56 formed to allow parallel movement of the grinding base section 18 along one side of the semi-finished mesh-covered plate S1 placed on the stage 9.

[0033] Furthermore, the biasing force of the biasing section 21 is variably adjusted upward, and a blow section 45 is formed to discharge gas toward the grinding tool 20.

[0034] Furthermore, the grinding base 18 has a horizontal variable section 25 that allows the grinding angle of the rotary grinding section 19 to be varied horizontally, and a vertical variable section 34 that allows it to be varied vertically.

[0035] Furthermore, a retractable section 38 is formed that allows the rotating grinding section 19 to move downward against the biasing force of the biasing section 21.

[0036] Furthermore, at least two mobile grinding units 17 are positioned toward two opposing sides of the semi-finished mesh-covered plate S1 placed on the stage 9.

[0037] Furthermore, a plate-holding rotational vertical unit 66 is formed, consisting of a positioning and holding part 67 shown in Figure 2, which is formed to move back and forth diagonally inside the frame s1 of the semi-finished screen-stretched plate S1 placed on the stage 9; a rotating part 70 that makes the positioning and holding part 67 rotatable, as shown in Figure 1; and a vertical movement part 72 that makes the positioning and holding part 67 and the rotating part 70 vertically movable.

[0038] In other words, the mesh-covered plate finishing device 1 according to this embodiment, in which the semi-finished mesh-covered plate S1 is placed on the stage 9, automatically removes the excess mesh s3 that is exposed outside the frame of the semi-finished mesh-covered plate S1, as shown in Figure 3(a).

[0039] The configuration of each part of the screen-stretching plate finishing apparatus 1 according to one embodiment of the present invention will be described in detail below.

[0040] As shown in Figure 1, the housing 2 of the screen-stretching plate finishing device 1 is made of a metal frame (not shown) with adjusters 81 formed at the four corners of the lower end, and the lower half 4, which is surrounded on the sides by metal plates, houses a power supply unit, control unit, air compressor, etc. (not shown) for operating each part of the device, and compressed air from an externally installed air compressor is drawn into the device by piping. The upper part of the lower half 4 is made of a metal frame (not shown), with the front open and the other sides formed mainly of transparent resin plates in a U-shape, as shown by the dashed line.

[0041] Furthermore, a dust box (not shown) is provided inside the lower half 4. As shown in Figures 1, 4, and 5, the dust box has a cylindrical upper part 7 on the upper half 3, which is an inverted trapezoidal shape with the bottom base facing upwards and the top base facing downwards when viewed from the front, and a rectangular shape when viewed from the side. A rectangular cylindrical lower part 8, which is connected to the upper part 7, penetrates a base plate 5 made of a metal plate material of a predetermined thickness that forms the upper surface of the lower half 4, and extends into the dust box to form a residue collection part 6 made of a sheet-like metal plate material.

[0042] Furthermore, mobile grinding units 17 are provided on the left and right sides of the residue intake section 6, and the mobile grinding units 17 are mounted and fixed on guide rail sections 60 that allow them to move closer to and further away from the residue intake section 6 from the left and right sides.

[0043] Furthermore, a stage 9 is formed above the left and right vicinity of the residue intake section 6. The stage 9 is mounted and fixed to the guide rail section 60, similar to the mobile grinding unit 17, but as shown in Figure 4, it is formed to be able to move freely from side to side above the residue intake section 6, independently of the mobile grinding unit 17.

[0044] Specifically, the guide rail section 60 consists of three blocks 62a, 62a, and 62b that are slidably engaged in the axial direction of the linear guide rail 61 via multiple rolling bearing balls, on a rectangular strip-shaped linear guide rail 61 with concave grooves on its left and right sides, on the base plates 5 on the left and right sides of the residue intake section 6. This is a so-called linear guide, such as an LM guide (registered trademark: THK Corporation). Two of these left and right movement guides 60 are formed parallel to each other at a predetermined interval, and a unit left and right movement base 63, made of a single metal plate, is bridged over the two blocks 62a of each section to constitute the guide rail section 60, on which the mobile grinding unit 17 is mounted and fixed.

[0045] The left-right movable base 63 of the unit moves the position of the grinding tool 20 to an appropriate position when processing mesh-covered plates S of different sizes. In this embodiment, in order to process two types of mesh-covered plates S, the left-right movable base 63 of the unit is configured such that the piston rod of an air cylinder (not shown) is connected to the unit, allowing the grinding tool 20 to be moved to two different positions by changing the position of the front and rear ends of the piston rod.

[0046] Furthermore, a stage left-right movement base 64 made of a single metal plate is bridged over each of the remaining blocks 62b of the left-right movement guide 60, and metal rectangular rod-shaped stage supports 16 are erected front to back on the stage left-right movement base 64, with metal strip-shaped stages 9 bridged over the upper ends of each of them so that they are higher than the residue intake section 6.

[0047] The stage left-right moving base 64 allows the frame s1 to be placed in the appropriate position on the stage 9 when processing mesh-covered plates S of different sizes. In this embodiment, in order to process two types of mesh-covered plates S, the stage left-right moving base 64 is configured such that the piston rod of an air cylinder (not shown) is connected to the stage left-right moving base 64, and the position of the front and rear ends of the piston rod allows the stage 9 to be varied to two different positions.

[0048] In this embodiment, air cylinders are used to vary the position of the unit left / right moving base 63 and the stage left / right moving base 64. However, various modifications and changes are possible, such as using pulse motors to flexibly accommodate multiple mesh-covered plates S of different sizes.

[0049] Furthermore, as shown in Figure 5, the stage 9 has elongated holes 10 that penetrate vertically near its front and rear ends. Positioning pins 11 are formed in the elongated holes 10, which are inserted from below the stage 9 and protrude beyond the stage 9. The position of the positioning pins 11 can be variably adjusted according to the size of the semi-finished mesh-covered plate S1 being processed.

[0050] In this embodiment, in order to automatically change the position of the positioning pin 11 of the stage 9, an air cylinder (not shown) is formed at the bottom of the stage 9 with a piston rod facing upward, and the forward and backward movement of the piston rod is made possible to change the positioning pin 11 back and forth. However, the mechanism for changing the position of the positioning pin 11 is not limited to this, and various modifications and changes are possible, such as using other components or a mechanism for manual change.

[0051] Furthermore, the stage 9 has a positioning debris prevention stay 12 located further towards the end than the elongated hole 10, which guides the semi-finished mesh-covered plate S1 placed on the stage 9 to facilitate positioning on the stage 9, while preventing cutting debris from scattering towards the semi-finished mesh-covered plate S1. As shown in Figures 2 and 4, this positioning debris prevention stay 12 is formed by bending one side of a roughly L-shaped metal plate at a right angle, fixing a horizontal base piece 13 from above with a bolt 14 into a female screw hole (not shown) formed on the upper surface of the stage 9, and arranging a vertical rectangular strip-shaped shielding piece 15 that is bent upward in a direction parallel to the stage 9 and extending toward the opposite end of the stage 9, with the upper edge of the shielding piece 15 inclined outwards.

[0052] The positioning and scattering prevention stays 12 are formed symmetrically on both ends of the stage 9.

[0053] Next, as shown in Figures 4 and 6, the mobile grinding unit 17 consists of a grinding movement section 56 and a grinding base section 18 disposed on top of the grinding movement section 56. The grinding movement section 56 consists of a front-to-back linear guide mechanism section 58 mounted and fixed on a unit left-to-right movement base 63 and a unit mounting base 57 connected to the front-to-back linear guide mechanism section 58. The grinding base section 18 is connected to the front-to-back linear guide mechanism section 58 via the unit mounting base 57.

[0054] As shown in Figure 5, the front-rear linear guide mechanism 58 is arranged with its axis in the front-rear direction and can be moved in a straight and precise position by the rotation of the motor using a linear guide, ball spline, linear bush, etc., which is connected to a ball screw directly connected to a servo motor or pulse motor. For example, RoboCylinder (registered trademark: IAI Corporation) can be used.

[0055] Furthermore, as shown in Figure 6, a unit mounting base 57 made of a single rectangular metal plate is mounted and fixed on the upper surface of the front and rear slider 59, which forms part of the front and rear linear guide mechanism 58 and is capable of moving linearly on its upper surface, allowing the grinding base 18 connected to the upper surface to move back and forth.

[0056] As shown in Figures 6 and 7, the grinding base 18 is provided with a horizontally adjustable section 25 on the upper surface of the unit mounting base 57, which is unilaterally arranged to be horizontally adjustable. This section includes a rotary grinding section 19 equipped with a detachable grinding tool 20 at its tip, a biasing section 21 that biases the rotary grinding section 19 upward, a vertically adjustable section 34 that allows the rotary grinding section 19 to be vertically adjustable, and a retractable section 38 that allows the rotary grinding section 19 to move downward against the biasing force of the biasing section 21. The horizontally adjustable section 25 allows these components to be horizontally adjustable.

[0057] Specifically, the horizontally adjustable section 25 is formed from a unit base 33 made of a single rectangular metal plate and a horizontally adjustable plate 26 made of a single roughly rectangular metal plate disposed on the upper surface of the unit base 33. The horizontally adjustable plate 26 has two curved horizontally adjustable elongated holes 27 drilled in the front and rear, with the same center position and curvature. The unit base 33 located directly below the two horizontally adjustable elongated holes 27 has female screw holes (not shown) formed in each. By screwing horizontal angle fixing bolts 28 into the horizontally adjustable plate 26 from above and fastening them so that the horizontally adjustable plate 26 is sandwiched between the bolt heads and the unit base 33, the horizontally adjustable plate 26 can be fixed on the unit base 33 while changing the horizontal angle H (Figure 8(b)) in the horizontal direction.

[0058] Furthermore, the rotary grinding unit 19 is a grinding router to which a grinding tool 20 can be detachably attached to its tip. In the screen-stretching plate finishing device 1 according to this embodiment, the M113H from Minitor Corporation is combined with a dedicated controller to enable control of the rotation speed and other parameters.

[0059] Furthermore, as shown in Figures 6 and 7, metal strip-shaped connecting pieces 30 are attached to the upper ends of the grinding section holding support columns 29, each made of a metal round bar and erected at the front and rear of the inner upper surface of the horizontally adjustable plate 26, to form a gate shape. In the middle of the two grinding section holding support columns 29, metal rectangular block-shaped frame pieces 31 are inserted through the grinding section holding support columns 29, with sliding members 32 such as slide bushes pressed into holes near both ends, allowing the frame pieces 31 to slide freely up and down. The rotating grinding section 19 is positioned in the center of the upper surface of the frame pieces 31.

[0060] Furthermore, a female thread (not shown) is formed on the central periphery of the outer surface of the support piece 31. At this position, a metal plate is bent into an L-shape, and a sliding hole 40 with an inner diameter or notch slightly larger than the outer diameter of the piston rod 43 (described later) is drilled in one piece, and a bolt hole (not shown) is drilled in the other piece. This upper and lower regulating stay 39 is fastened and fixed to the female thread of the support piece 31 by bolts 41 via the bolt hole.

[0061] Furthermore, as shown in Figure 6, an air cylinder 42 with a piston rod 43 oriented vertically upward is mounted and fixed on the upper surface of the horizontally adjustable plate 26, outward from the grinding section holding support column 29. The piston rod 43 is inserted through the sliding hole 40 of the vertical regulating stay 39, and an upper limit regulating section 44, having an outer diameter larger than the outer diameter of the piston rod 43 and the inner diameter of the sliding hole 40, is connected to the upper end of the piston rod 43. This allows the vertical regulating stay 39 to slide freely within the range of the piston rod 43 without coming out of the piston rod 43, and furthermore, the upper limit of movement of the support piece 31, i.e., the upper limit of movement of the rotary grinding section 19, is regulated.

[0062] Furthermore, regarding the placement of the rotary grinding unit 19 on the frame piece 31, as shown in Figure 7, the rotary grinding unit 19 is a rectangular block with a hole drilled in the center that is slightly narrower than the outer diameter of the middle part of the rotary grinding unit 19. The fixing block 35, which forms part of the vertically variable section 34 divided into upper and lower 2 halves, is used to clamp and fix the rotary grinding unit 19 using bolts (not shown) and female screw holes. In addition, the rotary grinding unit 19 can be placed on the frame piece 31 by screwing two vertical angle fixing bolts 37, which form part of the vertically variable section 34, into the gap between two L-shaped fixing stays 36, which form part of the vertically variable section 34 and are connected to the upper surface of the frame piece 31, by aligning female screw holes (not shown) drilled on the left and right sides of the lower fixing block 35 with bolt holes (not shown) drilled on the fixing stays and screwing them in from the outside.

[0063] Therefore, the vertical angle V (Figure 8(a)) of the rotary grinding section 19, which is clamped and fixed to the fixed block 35 by the fixed block 35, fixed stay 36, and vertical angle fixing bolt 37 that constitute the vertical variable section 34, can be varied by loosening the vertical angle fixing bolt 37, and fixed to any angle V by tightening it.

[0064] Furthermore, as shown in Figures 6 and 7, a biasing section 21 is formed on the grinding section holding column 29 directly below the frame piece 31, consisting of a compression spring 22 and a set collar 24 that bias the rotating grinding section 19 upward. Specifically, a compression spring 22, having an inner diameter slightly larger than the outer diameter of the grinding section holding column 29, is inserted through the grinding section holding column 29, and a donut-shaped set collar 24 made of metal and of a predetermined thickness is fixed to the grinding section holding column 29 by screwing a set screw into a female screw hole (not shown), thereby forming the biasing section 21.

[0065] Therefore, by controlling the air cylinder 42 as described above, the upper limit restricting section 44 is in the highest position and the support piece 31 is in the upper limit position. By moving the vertical position of the set collar 24 relative to the support piece 31, the force of the compression spring 22 can be varied, making it possible to freely vary the upward biasing force of the rotating grinding section 19 by the biasing section 21.

[0066] In this embodiment, a compression spring 22 and a set collar 24 are used to make the upward biasing force of the rotating grinding section 19 by the biasing section 21 variable. However, as long as the rotating grinding section 19 is biased upward, the configuration of the biasing section 21 is not limited to a compression spring 22, and the variable biasing force mechanism is not limited to this embodiment. For example, various modifications and changes are possible, such as configuring the biasing section 21 to be variable while applying a biasing force using an electro-pneumatic regulator and a low-friction cylinder.

[0067] Furthermore, when placing the semi-finished mesh-covered plate S1 by the rotary grinding unit 19 onto the stage 9, or when replacing the grinding tool 20 at the tip of the rotary grinding unit 19, the upper limit restricting unit 44 can be moved to the lowest position, allowing the rotary grinding unit 19 to move freely downward against the biasing force of the biasing unit 21, so that the air cylinder 42 functions as a retractable unit 38.

[0068] Furthermore, a blow section 45 is formed in the gap between the frame piece 31 and the connecting piece 30 of the front grinding section holding column 29, which discharges gas toward the grinding tool 20. Specifically, a metal block-shaped clamp 46, which has a slit 47 with an inner diameter approximating the outer diameter of the grinding section holding column 29, is inserted through the grinding section holding column 29, and the slit 47 is fastened with a bolt (not shown) to fix it to the grinding section holding column 29.

[0069] A metal rectangular block-shaped blow base 49 is connected to the front of the clamp 46 via a connecting plate 48 made of metal sheet material using bolts 50, forming a blow section 45 that is bent inward from the blow base 49 toward the grinding tool 20.

[0070] The blow base 49 has a flow path (not shown) that penetrates horizontally through the left and right side walls, and female threads are threaded near both ends of the flow path. The male thread of the joint 51 is screwed into the outer female thread and secured with a nut 52, and the male thread of the blow section 45, which has a nozzle 53 at one end of a predetermined length tube and a male thread at the other end, is screwed into the inner female thread and secured with a nut 54.

[0071] Furthermore, the joint 51 is connected to piping (not shown) that communicates with piping drawn in from an air compressor installed externally, and is configured to discharge gas from the nozzle 53 toward the grinding tool 20.

[0072] Next, as shown in Figure 1, the base plate 5 behind the residue intake section 6 has a plate holding rotation vertical unit 66 formed thereon, which consists of a positioning and holding section 67 (Figure 2) formed to move back and forth diagonally towards the inside of the frame s1 of the semi-finished screen-stretched plate S1 placed on the stage 9, a rotating section 70 that makes the positioning and holding section 67 rotatable, and an vertical movement section 72 that makes the positioning and holding section 67 and the rotating section 70 vertically movable.

[0073] The vertical movement section 72 of the plate-holding rotation vertical unit 66 is specifically a vertical linear guide mechanism, which is arranged with its axis in the vertical direction and can be moved in a straight and precise position by the rotation of a motor using a linear guide, ball spline, linear bush, etc., which is connected to a ball screw directly connected to a servo motor or pulse motor. For example, a RoboCylinder (registered trademark: IAI Co., Ltd.) can be used. A unit support column 80, formed in a rectangular shape from a metal plate of a predetermined thickness, is erected on the base plate 5 behind the residue intake section 6, and the vertical movement section 72 is connected to its front.

[0074] Furthermore, a rotating upper and lower base 74 made of a single rectangular metal plate is superimposed on the front of the vertical slider 73, which forms part of the vertical movement section 72 and can move linearly up and down on the front surface. A rotating section mounting section 75 is further provided protruding from the front surface of the base, and a rotating section 70 equipped with a positioning and holding section 67 hangs down from its lower surface.

[0075] The rotating part mounting section 75 is formed by a reinforcing plate 76 and a rotating part mounting base 79. The reinforcing plate 76 is made of a roughly trapezoidal metal plate that extends forward from both left and right edges of the upper and lower rotating part bases 74. The vertical piece 77 of the reinforcing plate 76 is connected to the upper and lower rotating part bases 74, and the rotating part mounting base 79, made of a single rectangular metal plate, is mounted on the horizontal piece 78 that forms the lower base.

[0076] Furthermore, a rotary table 70, which forms a rotary part 70 that can be rotated or freely rotated and whose speed can be adjusted by electricity (motor) or by air and electricity (motor), is attached to the lower surface of the rotating part mounting base 79, suspended in a position where its center of rotation is close to the center of the semi-finished mesh-covered plate S1 that is placed on the lower stage 9. In addition, a holding part mounting plate 71, which is made of a metal plate material that is square in plan view and has its four sides bent slightly downwards to form a substantially concave shape downwards, is attached to the lower surface of the rotating table 70, with the upper surface of the holding part mounting plate 71 attached to the lower surface of the rotating table 70 so that the center of rotation of the lower surface of the rotating table 70 and the center of the holding part mounting plate 71 coincide.

[0077] Furthermore, a positioning and holding part 67 (Figure 2) is attached to the lower surface of the holding part mounting plate 71, and is formed to move back and forth diagonally towards the inside of the frame s1 of the semi-finished mesh-covered board S1 placed on the stage 9. Specifically, a slide table 67 that can slide back and forth electrically (motor) or with air and electricity (motor) and whose speed can be adjusted is used as the positioning and holding part 67.

[0078] As shown in Figure 2, a diagonal front-to-back slider (not shown) that forms part of the positioning and holding section 67 and is linearly movable on its lower surface is connected to a pentagonal metal block-shaped contact base 68 with right-angle vertices on its outer side, and rectangular block-shaped contact sections 69 made of synthetic resin material such as urethane are connected to the two sides that form the right angle.

[0079] By forming the positioning and holding part 67 in this manner, when the diagonal front-to-back sliders are extended, the contact part 69 of the contact base 68, which similarly extends towards the diagonal inside of the frame s1 of the semi-finished mesh-covered plate S1, presses against the inner wall of the frame s1 and holds it in place. This makes it possible to perform various complex operations, such as raising the semi-finished mesh-covered plate S1 placed on the stage 9, rotating it to any angle such as 90°, and then lowering it to retract the diagonal front-to-back sliders.

[0080] [Example of operation] The mesh-covered plate finishing apparatus 1 according to this embodiment, configured in this way, can be operated, for example, as follows to remove the excess mesh s3 exposed outside the frame of the semi-finished mesh-covered plate S1.

[0081] As the initial preparation, to adjust the horizontal angle H of the rotary grinding section 19 (Figure 8(b)), as shown in Figure 6, loosen the horizontal angle fixing bolt 28 of the horizontal variable section 25 and rotate the horizontal variable plate 26 relative to the unit base 33, then fasten and fix the horizontal angle fixing bolt 28 at the desired angle H. Next, to adjust the vertical angle V of the rotary grinding section 19 (Figure 8(a)), as shown in Figure 7, loosen the vertical angle fixing bolt 37 of the vertical variable section 34 and fasten the vertical angle fixing bolt 37 at the desired angle V.

[0082] As the next step in preparation, the size (type) of the mesh-covered plate S is instructed to the control unit. In Figures 4 and 5, the left-right position of the stage 9 is moved to the appropriate position by the reciprocating movement of the piston rod of an air cylinder (not shown), which moves the stage left-right moving base 64 to the appropriate position. The front-back position is moved to the appropriate position by the reciprocating movement of the piston rod of a separate air cylinder (not shown), which moves the positioning pin 11 to the appropriate position.

[0083] Furthermore, the left-right position of the grinding tool 20 is adjusted by the reciprocating movement of the piston rod of a separate air cylinder (not shown), which moves the left-right moving base 63 of the unit to an appropriate position. The grinding tool 20 of the rotating grinding section 19 of the moving grinding unit 17, which is point-symmetrically positioned on the left and right, is positioned below the semi-finished mesh-covered plate S1 by the downward movement of the piston rod 43 of the air cylinder 42 which forms the retraction section 38. In addition, as shown in Figure 8(b), the movement of the front-rear slider 59 of the front-rear linear guide mechanism 58 moves the grinding tool 20 to a position outside the frame s1 of the semi-finished mesh-covered plate S1, and this position of the grinding tool 20 becomes the origin position.

[0084] Subsequently, the worker places the semi-finished screen-stretched plate S1 on the stage 9 as shown in Figure 1 and gives a start command to the control unit. The plate-holding rotation up / down unit 66 then moves downward to hold the semi-finished screen-stretched plate S1 with the positioning and holding unit 67 (Figure 2).

[0085] Next, the grinding tool 20 of the rotary grinding unit 19 rotates, and the piston rod 43 of the retractable unit 38 shown in Figure 6 rises, causing the rotary grinding unit 19 to rise as well. Then, as shown in Figure 8(a), the moving grinding unit 17 moves along the corners of the frame s1 of the semi-finished mesh-covered plate S1, cutting and removing excess mesh s3 and protruding adhesive, as shown in Figure 9(a). After moving to a position slightly beyond the end of the frame s1, the piston rod 43 of the air cylinder 42 descends, and as shown in Figure 9(b), the excess mesh s3 on the left and right sides of the semi-finished mesh-covered plate S1 is removed.

[0086] Subsequently, the movement of the front and rear sliders 59 of the front and rear linear guide mechanism 58 moves the mobile grinding unit 17 to the origin position. At the same time, the plate holding rotation up and down unit raises the semi-finished screen-stretched plate S1 while holding it with the positioning and holding part 67, rotates it 90° clockwise by the rotation part 70, and then descends again, holding the semi-finished screen-stretched plate S1, to the stage 9 in the state shown in Figure 10(a).

[0087] Then, the same operations as described above are performed, and as shown in Figure 10(b), once all the excess mesh s3 has been removed, the moving grinding unit 17 moves to the origin position, and at the same time, the positioning and holding part 67 of the plate holding rotation up and down unit 66 stops holding the mesh-stretched plate S, and the plate holding rotation up and down unit 66 rotates 90° counterclockwise while rising and stops rising.

[0088] Finally, the worker removes the mesh-covered plate S from the stage 9, places the next semi-finished mesh-covered plate S1 back on the stage 9, and gives a start command to the control unit, allowing the work to be carried out continuously.

[0089] As described above, the mesh-covered plate finishing device 1 of the present invention is configured to remove excess mesh s3 from the outer edge of a semi-finished mesh-covered plate S1 that is stretched with mesh to the outside of a rectangular frame s1, and consists of a stage 9 on which the semi-finished mesh-covered plate S1 is placed, and a movable grinding unit 17, the movable grinding unit 17 having a rotary grinding section 19 equipped with a detachable grinding tool 20 at its tip for cutting off excess mesh s3 while rotating, and the rotary grinding section 19 is attached above. The grinding base 18 is equipped with a biasing part 21 that exerts force, and the grinding moving part 56 is formed to allow the grinding base 18 to move in parallel along one side of the semi-finished mesh-covered plate S1 placed on the stage 9. As a result, the grinding base 18 can automatically cut off any excess mesh s3 or hardened adhesive that protrudes from the frame s1 on one side of the semi-finished mesh-covered plate S1 as it moves between the ends of the frame s1, making the removal work safe, easy, and precise.

[0090] Furthermore, by forming the biasing force of the biasing section 21 to be variable upward, and by forming a blow section 45 that discharges gas toward the grinding tool 20, the influence of the grinding tool 20 on the frame s1 due to cutting can be suppressed, and fine fibers of the removed mesh s3 and adhesive residue can be removed.

[0091] Furthermore, the grinding base 18 is equipped with a horizontal variable section 25 that allows the grinding angle of the rotary grinding section 19 to be freely adjustable horizontally, and a vertical variable section 34 that allows it to be freely adjustable vertically. This allows the cutting conditions to be adjusted to the optimal level according to the size of the mesh-covered plate S, the material of the mesh, the adhesion status, etc., thereby improving versatility.

[0092] Furthermore, by forming a retractable section 38 that allows the rotary grinding section 19 to move downward against the biasing force of the biasing section 21, interference with the rotary grinding section 19 when placing the semi-finished mesh-covered plate S1 on the stage 9 and the rotary grinding section 19 not getting in the way when not cutting, such as when changing the grinding tool 20 can be prevented, thereby preventing damage to the device and improving workability.

[0093] Furthermore, by positioning at least two mobile grinding units 17 toward two opposing sides of the semi-finished mesh-covered plate S1 placed on the stage 9, the excess mesh s3 on both sides can be removed simultaneously, thereby significantly improving work efficiency.

[0094] Furthermore, by forming a plate-holding rotational vertical unit 66 consisting of a positioning and holding part 67 formed to move back and forth diagonally inside the frame s1 of the semi-finished mesh-covered plate S1 placed on the stage 9, a rotating part 70 that makes the positioning and holding part 67 rotatable, and an vertical movement part 72 that makes the positioning and holding part 67 and the rotating part 70 vertically movable, it is possible not only to hold the semi-finished mesh-covered plate S1 during cutting, but also to automatically change the side of the semi-finished mesh-covered plate S1 to be removed, so that operation can be performed particularly efficiently when multiple sides are cut simultaneously.

[0095] Although preferred embodiments of the screen-stretching plate finishing apparatus 1 according to this embodiment of the present invention have been described above, the present invention is not limited to any particular embodiment, and various modifications and changes are possible. [Explanation of Symbols]

[0096] S1 Semi-finished screen-covered version s1 frame s3 Extra gauze 1. Finishing device for stretched mesh boards 9 stages 17 Mobile Grinding Unit 18 Grinding base 19 Rotary grinding section 20 Grinding Tools 21. Encouraging part 25 Horizontal variable section 34 Vertically adjustable section 38 Evacuation Section 45 Blow section 56 Grinding moving section 66-inch plate holding rotation up / down unit 67 Positioning and holding part 70 Rotating part 72 Vertical movement section

Claims

1. A device for removing excess mesh from the outer edge of a semi-finished mesh-covered plate that has been stretched with mesh to protrude outside a rectangular frame, It consists of a stage on which the semi-finished mesh-covered plate is placed, and a mobile grinding unit. The mobile grinding unit is characterized by comprising a rotating grinding section having a detachable grinding tool at its tip for removing excess mesh while rotating, a grinding base section having a biasing section for biasing the rotating grinding section upward, and a grinding mobile section formed to allow the grinding base section to move parallel to one side of the semi-finished mesh-covered plate placed on the stage, and a mesh-covered plate finishing apparatus.

2. The screen-stretching plate finishing apparatus according to claim 1, characterized in that the biasing force upward of the biasing portion is variably formed, and a blow portion is formed to discharge gas toward the grinding tool.

3. The screen-stretching plate finishing apparatus according to claim 2, characterized in that the grinding base has a horizontal variable section that allows the grinding angle by the rotary grinding section to be varied horizontally and a vertical variable section that allows it to be varied vertically.

4. The screen-stretching plate finishing apparatus according to claim 3, characterized in that a retractable section is formed which allows the rotary grinding section to move downward against the biasing force of the biasing section.

5. The mesh-covered plate finishing apparatus according to claim 4, characterized in that at least two of the mobile grinding units are arranged toward two opposing sides of the semi-finished mesh-covered plate placed on the stage.

6. A screen-stretching plate finishing apparatus according to any one of claims 1 to 5, characterized in that it comprises a screen-stretching plate holding rotation vertical unit comprising: a positioning and holding portion formed to be able to move back and forth toward the diagonal inside of the frame of the semi-finished screen-stretching plate placed on the stage; a rotating portion that allows the positioning and holding portion to rotate; and a vertical movement portion formed to allow the positioning and holding portion and the rotating portion to move up and down.

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