Screen mask supporting frame and printing machine

Abstract

A screen mask support frame for supporting a screen mask having a size smaller than that capable of being disposed in a printing machine in which a viscous fluid is printed on an object using a screen mask in which a mask main body is fixed to an outer frame, the screen mask support frame comprising: a frame member having a size capable of being disposed in the printing machine; a pair of first mask supporting parts which are arranged on the inner sides of the two sides of the opposite side of the frame part and support the two sides of the opposite side of the outer frame of the screen mask; and a pair of second mask supporting parts which are arranged on the inner sides of the two sides of the other side, which are orthogonal to the two sides of the one side, of the frame part, and support the two sides of the other side, which are orthogonal to the two sides of the one side, of the outer frame of the screen mask, an interval between the pair of first mask support portions and an interval between the pair of second mask support portions can be adjusted.

Description

Technical Field

[0001] This specification discloses a screen mask support frame and a printing machine. Background Art

[0002] Conventionally, a support frame for holding a screen mask used in a printing apparatus for printing solder on a substrate has been known. For example, Patent Document 1 discloses a structure in which a screen mask is supported via an elastic support member. Prior Art Documents Patent Documents

[0003] Patent Document 1: Japanese Patent Laid-Open No. 3-227241. Summary of the Invention Technical Problem to be Solved by the Invention

[0004] However, in the above support frame, the elastic members are fixed to the support frame, and it is impossible to mount a plurality of screen masks having different sizes.

[0005] The main object of the present disclosure is to be configured to be able to support a plurality of screen masks having different sizes.

[0006] The present disclosure employs the following means to achieve the above main object. Means for Solving the Technical Problem

[0007] The screen mask support frame of the present disclosure is used in a printing machine for printing a viscous fluid on an object with a screen mask in which a mask main body is fixed to an outer frame, and is for supporting the screen mask having a size smaller than the size that can be arranged in the printing machine. The gist of the screen mask support frame is to include: a frame member having a size that can be arranged in the printing machine; a pair of first mask support portions provided inside opposite sides of the frame member, for supporting opposite sides of the outer frame of the screen mask; and the pair of second mask support portions provided inside the other sides of the frame member orthogonal to the one sides, for supporting the other sides of the outer frame of the screen mask orthogonal to the one sides, wherein the interval between the pair of first mask support portions and the interval between the pair of second mask support portions can be adjusted.

[0008] In this screen mask support frame, the width between the first and second mask support portions can be adjusted. Therefore, it can be configured to be able to support a plurality of screen masks having different sizes.

[0009] The printing machine of the present disclosure uses a screen mask with a mask body fixed to an outer frame to print a viscous fluid on an object. The main idea of the printing machine is to include: a pair of tracks extending to a printing area; a screen mask supported by a screen mask support frame, the screen mask support frame including: a frame member having a size capable of being disposed on the pair of tracks; a pair of first mask support portions provided inside opposite sides of the frame member to support opposite sides of the outer frame of the screen mask; and the pair of second mask support portions provided inside opposite sides of the frame member orthogonal to the one side to support opposite sides of the outer frame of the screen mask orthogonal to the one side from the side, wherein the interval between the pair of first mask support portions and the interval between the pair of second mask support portions can be adjusted; a detection sensor capable of detecting whether there is an interfering object between the pair of tracks; a contact portion disposed above the pair of tracks; a lifting portion for lifting and lowering the contact portion; a moving portion for moving the contact portion along the extending direction of the pair of tracks; and a control portion for controlling the lifting portion to lower the contact portion after detecting that there is no interfering portion of the screen mask support frame below the contact portion by the detection sensor, and then controlling the moving portion to move the contact portion along the extending direction in a state where the contact portion has been lowered.

[0010] In this printing machine, a plurality of screen masks of different sizes can be used for the printing machine by using the screen mask support frame. In addition, the contact portion can be made to contact at an appropriate position to carry the screen mask support frame on which the screen mask is mounted by using the contact portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a perspective view of the printing machine 10 and the storage rack 60. Figure 2 is a side view of the printing machine 10 and the storage rack 60. Figure 3 is a perspective view of the pusher 34 and the screen mask M supported by the screen mask support frame 80. Figure 4 is a perspective view showing a state where the screen mask M is mounted on the screen mask support frame 80. Figure 5 is a perspective view of the screen mask support frame 80. Figure 6 is an exploded perspective view of the screen mask support frame 80. Figure 7A is a cross-sectional view of the first lower surface support member 83 mounted on the first side portion 81a with a spacer 85 having a smaller width therebetween. Figure 7BIt is a cross-sectional view of the first lower surface support member 83 mounted on the first side portion 81a with a relatively wide spacer 85 therebetween. Figure 8 It is a side view of the side support member 90. Figure 9 It is a perspective view of the first pressing member 94a. Figure 10 It is a cross-sectional view when the pressing member main body 95 of the first pressing member 94a is positioned at the entry position R2. Figure 11A It is a side view showing a state where no interfering object is detected by the interfering object detection sensor 39. Figure 11B It is a side view showing a state where an interfering object is detected by the interfering object detection sensor 39. Figure 12 It is a block diagram showing the electrical connection relationship of the printing machine 10. Figure 13 It is a flowchart showing an example of a support frame replacement routine. Detailed Description of the Invention

[0012] Next, a mode for implementing the present disclosure will be described with reference to the drawings. Figure 1 It is a perspective view of the printing machine 10 and the storage rack 60. Figure 2 It is a side view of the printing machine 10 and the storage rack 60. Figure 3 It is a perspective view of the pusher 34 and the screen mask M supported by the screen mask support frame 80. Figure 4 It is a perspective view showing a state where the screen mask M is mounted on the screen mask support frame 80. Figure 5 It is a perspective view of the screen mask support frame 80. Figure 6 It is an exploded perspective view of the screen mask support frame 80. Figure 7A It is a cross-sectional view of the first lower surface support member 83 mounted on the first side portion 81a with a relatively narrow spacer 85 therebetween. Figure 7B It is a cross-sectional view of the first lower surface support member 83 mounted on the first side portion 81a with a relatively wide spacer 85 therebetween. Figure 8 It is a side view of the side support member 90. Figure 9 It is a perspective view of the first pressing member 94a. Figure 10 It is a cross-sectional view when the pressing member main body 95 of the first pressing member 94a is positioned at the entry position R2. Figure 11A It is a side view showing a state where no interfering object is detected by the interfering object detection sensor 39. Figure 11B It is a side view showing a state where an interfering object is detected by the interfering object detection sensor 39. Figure 12 It is a block diagram showing the electrical connection relationship of the printing machine 10. In addition, in Figures 1 to 11BIn this case, the left - right direction is set as the X - axis (in Figure 2 , 8 , 10, 11A, 11B, it is the direction perpendicular to the paper surface), the front - back direction is set as the Y - axis (in Figure 7A , 7B , it is the direction perpendicular to the paper surface), and the up - down direction is set as the Z - axis.

[0013] The printing machine 10 of this embodiment uses a screen mask M in a state supported by a screen mask support frame 80 to print solder on a substrate S, and is combined with a component mounter that mounts electronic components on the substrate S printed with solder to form a production line. As Figure 1 , Figure 2 shown, the printing machine 10 includes a printing machine main body 11, a housing 12 that houses the printing machine main body 11, a replacement device 50, a storage rack 60, a screen mask M, an interference detection sensor 39, and a control device 100 that controls the entire printing machine 10. The printing machine main body 11 has a pair of left - right transfer rails 20, a head device 30, and a substrate transfer device 40.

[0014] A pair of transfer rails 20 are used for transferring the screen mask M. As Figure 2 shown, the transfer rails 20 are a pair of long rails provided at substantially the same height as a through - hole 46 provided on the front surface of the middle section of the housing 12 and extending in the front - back direction (Y - axis direction). In addition, the transfer rails 20 are also used for transferring a transfer jig on which replacement components such as a squeegee 32 and a substrate support member 42 described later are mounted in order to replace the replacement components.

[0015] The head device 30 is provided in the upper section of the housing 12 (above the transfer rails 20). As Figure 2 shown, the head device 30 has a head main body 31 and a head moving part 36 that moves the head main body 31 in the front - back direction (Y - axis direction) as the printing direction.

[0016] As Figure 2 shown, the head main body 31 has a pair of front - back squeegees 32, a squeegee lifting part 33 formed of, for example, a cylinder and lifting the corresponding squeegee 32, a pusher 34, and a pusher lifting part 35.

[0017] A pair of squeegees 32 print solder paste on the substrate S below through the pattern holes formed in the screen mask M by pressing the solder paste on the screen mask M into the pattern holes. The pair of squeegees 32 are plate - like members extending in the left - right direction (X - axis direction) orthogonal to the printing direction. The pair of squeegees 32 are inclined so as to be more separated from each other toward the lower side when viewed from the left - right direction.

[0018] The pusher 34 is used for transferring the screen mask M. The pusher 34 is held by the head main body 31 so as to be located above between the pair of transfer rails 20. As Figure 3As shown, the pusher 34 is a flat plate-shaped component extending in the left-right direction (X-axis direction). The pusher lifting portion 35 moves the pusher 34 in the up-down direction (Z-axis direction). The pusher lifting portion 35 is constituted by, for example, a cylinder.

[0019] The head moving portion 36 moves the head main body 31 in the front-rear direction (Y-axis direction). As Figure 1 shown, the head moving portion 36 has a guide rail 37 extending in the front-rear direction, a Y-axis slider 38 moving along the guide rail 37, and a motor (not shown) for driving the Y-axis slider 38. In a state where the pusher 34 has been lowered by the pusher lifting portion 35, the pusher 34 moves back and forth through the head moving portion 36, thereby abutting against the outer surface or the inner surface of a later-described third side portion 81c or a fourth side portion 81d of the screen mask support frame 80 on the transfer rail 20, and pushing the screen mask support frame 80 back and forth to move it. As Figure 2 shown, the screen mask support frame 80 moves in and out of the housing 12 through a through-hole 46 provided on the front surface of the middle portion of the housing 12. In addition, a support frame detection sensor 47 for detecting the passage of the screen mask support frame 80 is provided at the through-hole 46.

[0020] The substrate transfer device 40 transfers and positions the substrate S in a supported manner, and brings the substrate S into contact with and separates it from the screen mask M (back surface). The substrate transfer device 40 is provided at the lower portion of the housing 12 (below the transfer rail 20). As Figure 2 shown, the substrate transfer device 40 includes: a substrate transfer portion 41 for transferring the substrate S in the left-right direction (X-axis direction); a substrate support member 42 as a support member for supporting the substrate S from below; and a substrate support member lifting portion 43 for lifting and lowering the substrate support member 42. The substrate transfer portion 41 includes a pair of front and rear conveyor belts, and transfers the substrate S by driving the pair of conveyor belts. In addition, the pair of conveyor belts adjusts the front-rear interval according to the size of the transferred substrate S. Further, the substrate support member 42 is replaced with a size suitable for supporting the substrate S according to the size of the substrate S.

[0021] The replacement device 50 receives the storage rack 60 that houses the replacement parts (such as the screen mask M and the substrate support member 42) used in the printing press main body 11, and transports the replacement parts between the storage rack 60 and the printing press main body 11. In the storage rack 60, the screen mask M is stored in a state of being supported by the screen mask support frame 80, and the substrate support member 42 is stored in a state of being mounted on a transfer jig (not shown). The replacement device 50 includes a left unit 51a provided on the left side of the front surface of the printing press main body 11 and a right unit 51b provided on the right side of the front surface of the printing press main body 11. The left unit 51a and the right unit 51b have a rack support member 52 that receives the storage rack 60 and supports its lower surface from both left and right sides, and a rack lifting unit 53 that lifts and lowers the rack support member 52. The rack lifting unit 53 is constituted by, for example, a combination of a ball screw mechanism and a motor, or a linear motor. The storage rack 60 supported by the rack support member 52 is lifted and lowered together with the rack support member 52 by the rack lifting unit 53. Moreover, the left unit 51a and the right unit 51b have a support frame front-back movement unit 54 that transports the screen mask support frame 80 and the transfer jig in the storage rack 60 back and forth from both left and right side surfaces by means of a belt, rollers, etc.

[0022] As Figure 1 shown, the storage rack 60 is a housing body that has a pair of left and right support rails 61 with multiple layers up and down and can house the replacement parts in each support rail 61. In addition, openings 62 and 63 are formed on the front surface and the back surface of the storage rack 60. The replacement parts enter and exit through the opening 62 on the front surface side by an operator or the like, and are carried in and out through the opening 63 on the back surface side by the support frame front-back movement unit 54. In a state where the replacement device 50 has received the storage rack 60, the support frame front-back movement unit 54 sends out the replacement parts supported by the support rail 61 located at approximately the same height as the transfer rail 20 of the printing press main body 11 among the multiple support rails 61 of the storage rack 60 to the printing press main body 11. In addition, the support frame front-back movement unit 54 sends the replacement parts supported by the transfer rail 20 of the printing press main body 11 into the support rail 61 of the storage rack 60 located at approximately the same height as the transfer rail 20. In addition, the storage rack 60 can be carried by an operator to the receiving position of the replacement device 50, or can be mounted on an automatic guided vehicle (AGV) and automatically carried by the automatic guided vehicle to the receiving position of the replacement device 50.

[0023] The screen mask M is used to print solder onto the substrate S below through the pattern holes by pressing the solder into the pattern holes using a squeegee 32. The screen mask M has an outer frame F and a mask main body B fixed to the outer frame F. The mask main body B is a thin metal plate. The screen mask M is positioned and fixed at the working position (printing area) on the transfer rail 20 in a state of being supported by the screen mask support frame 80 for solder printing.

[0024] The wire mesh mask support frame 80 supports the wire mesh mask M. As Figure 5 , Figure 6 shown, the wire mesh mask support frame 80 includes a frame member 81, a lower surface support member 82 (a first lower surface support member 83 and a second lower surface support member 84), a side surface support member 90 (a first side surface support member 91, 91, and a second side surface support member 92), and a pressing member 94 (first to fourth pressing members 94a to 94d). The frame member 81 has four sides in a rectangular shape. The frame member 81 has: a first side portion 81a and a second side portion 81b that extend parallel to each other in the front-rear direction (Y-axis direction); a third side portion 81c that extends in the left-right direction (X-axis direction) and connects one end portions of the first side portion 81a and the second side portion 81b to each other; and a fourth side portion 81d that extends in the left-right direction (X-axis direction) and connects the other end portions of the first side portion 81a and the second side portion 81b to each other. In addition, the dimensions of the first side portion 81a and the second side portion 81b in the front-rear direction (Y-axis direction) are lengths that cover the maximum range in the front-rear direction that can be printed and correspond to the interval between a pair of transfer tracks 20. In addition, the dimensions of the third side portion 81c and the fourth side portion 81d in the left-right direction (X-axis direction) are lengths that cover the maximum range in the left-right direction that can be printed.

[0025] As Figures 4 to 10 shown, the lower surface support members 82 are respectively fixed to the first side portion 81a and the second side portion 81b of the frame member 81, and support the two sides of the outer frame F of the wire mesh mask M that extend in the front-rear direction (Y-axis direction) from below. The lower surface support member 82 has a first lower surface support member 83 that places one of the two sides of the outer frame F extending in the front-rear direction on the placement surface P and a second lower surface support member 84 that places the other of the two sides on the placement surface P. As Figure 4 , Figure 5 shown, in the present embodiment, the first lower surface support member 83 is mounted on the right side surface in the drawing of the first side portion 81a with a spacer 85 interposed therebetween. In the present embodiment, the second lower surface support member 84 is mounted on the left side surface in the drawing of the second side portion 81b with a spacer 86 interposed therebetween. In addition, as Figure 6 shown, the left end portion of the spacer 85 in the left-right direction in the drawing is fixed to a bracket 87 fixed to the first side portion 81a with a mounting screw 89, and the right end portion is fixed to the first lower surface support member 83 with a mounting screw 89. Similarly, the right end portion of the spacer 86 in the left-right direction is fixed to a bracket 88 fixed to the second side portion 81b with a mounting screw 89, and the left end portion is fixed to the second lower surface support member 84 with a mounting screw 89. In addition, in the wire mesh mask support frame 80, as Figure 7A , Figure 7BAs shown, a plurality of spacers 85, 86 of various sizes (lengths) are prepared in the left - right direction. It is possible to select a spacer of a desired size from the plurality of spacers 85, 86 and install the first lower - surface support member 83 and the second lower - surface support member 84. Thereby, the interval between the first lower - surface support member 83 and the second lower - surface support member 84 in the left - right direction (X - axis direction) can be adjusted. Therefore, the screen - mask support frame 80 can carry a screen mask M (outer frame F) having various widths in the left - right direction.

[0026] The side - support members 90 support both sides of the outer frame F of the screen mask M that extend in the left - right direction (X - axis direction) from the sides. As Figure 4 , Figure 5 shown, the side - support members 90 include a plurality of (two) first side - support members 91, 91 that support one side of the two sides of the outer frame F of the screen mask M that extend in the left - right direction, and a second side - support member 92 that supports the other side of the two sides. The first side - support members 91, 91 are fixed to the front side of the third side portion 81c at a predetermined interval in the left - right direction by mounting screws (not shown). On the other hand, the second side - support member 92 is fixed to the approximate center of the rear side of the fourth side portion 81d by mounting screws (not shown). The first side - support members 91, 91 and the second side - support member 92 are rectangular - parallelepiped - shaped members. As Figure 6 , Figure 8 shown, a leaf spring 93 is mounted on the surface of the second side - support member 92. By the elastic force of the leaf spring 93, the outer frame F of the screen mask M is urged from the second side - support member 92 toward the first side - support members 91, 91 and is pressed against the first side - support members 91, 91. Thereby, the screen mask M (outer frame F) is positioned in the front - rear direction with respect to the screen - mask support frame 80. In addition, in the screen - mask support frame 80, the first side - support members 91, 91 and the second side - support member 92 having various lengths in the front - rear direction are prepared in advance. It is possible to select and replace a member of a desired size from the plurality of first side - support members 91, 91 and the plurality of second side - support members 92. Thereby, the interval between the first side - support members 91, 91 and the second side - support member 92 in the front - rear direction (Y - axis direction) can be adjusted. Therefore, the screen - mask support frame 80 can support and position a screen mask M (outer frame F) having various widths in the front - rear direction.

[0027] The first to fourth pressing members 94a to 94d are used to press the screen mask M against the placement surface P of the lower - surface support member 82 to prevent the screen mask M from floating up. As Figure 4 , Figure 5As shown, the first pressing member 94a is disposed at the left front corner of the frame member 81 so as to be rotatable about the rotation shaft 98a. The second pressing member 94b is disposed at the right front corner of the frame member 81 so as to be rotatable about the rotation shaft 98b. The third pressing member 94c is disposed at the left rear corner of the frame member 81 such that the rotation shaft 98c is rotatable. The fourth pressing member 94d is disposed at the right rear corner of the frame member 81 so as to be rotatable about the rotation shaft 98d. As Figure 4 , Figure 5 , Figure 9 , Figure 10 shown, the first to fourth pressing members 94a to 94d include a pressing member main body 95, a pressing screw 96, and a fixing screw 97. The pressing member main body 95 is a flat plate-shaped member having a length of less than half of the first side portion 81a and the second side portion 81b and less than half of the third side portion 81c and the fourth side portion 81d. As Figure 9 shown, the pressing member main bodies 95 of the first to fourth pressing members 94a to 94d can be rotated horizontally between a retracted position R1 where they are retracted from the inside of the frame member 81 and an inserted position R2 where they enter the inside of the frame member 81 about the corresponding rotation shafts 98a to 98d. Here, as Figure 5 shown, the retracted position R1 is a position where the pressing member main body 95 overlaps the corresponding third side portion 81c and fourth side portion 81d. On the other hand, the inserted position R2 is a position where the pressing member main body 95 has rotated 90° from the retracted position R1 toward the inside of the frame member 81.

[0028] The pressing screw 96 is used to press the outer frame F of the screen mask M against the placement surface P of the first lower surface support member 83 and the second lower surface support member 84. The pressing screw 96 is configured as a knurled screw, for example. As Figure 10 shown, a flange 96a (pressing surface) is formed at the lower end. When the pressing screw 96 is tightened in a state where the screen mask M is placed on the first lower surface support member 83 and the second lower surface support member 84 and the pressing member main body 95 has entered the inserted position R2, the lower surface of the flange 96a contacts the outer frame F of the screen mask M. If further tightened in this state, the pressing screw 96 presses the outer frame F of the screen mask M against the placement surface P of the first lower surface support member 83 or the second lower surface support member 84. On the other hand, in a state where the pressing screw 96 is loosened and does not contact the outer frame F, the pressing screw 96 does not press the outer frame F against the placement surface P of the first lower surface support member 83 or the second lower surface support member 84.

[0029] The fixing screw 97 is used to position the pressing member main body 95. The fixing screw 97 is configured as a knurled screw, for example. As Figure 9As shown, when the pressing member main body 95 is fastened in the state of being retracted to the retracted position R1, the pressing member main body 95 is fixed to the frame member 81 (the third side portion 81c or the fourth side portion 81d), and the pressing member main body 95 is positioned at the retracted position R1. In addition, when the fixing screw 97 is fastened in the state where the pressing member main body 95 has entered the entering position R2, the pressing member main body 95 is fixed to the first lower surface support member 83 or the second lower surface support member 84, and the pressing member main body 95 is positioned at the entering position R2. On the other hand, when the fixing screw 97 is loosened in the state where the pressing screw 96 is loosened, the pressing member main body 95 is allowed to rotate about the rotation shaft 98.

[0030] In the screen mask support frame 80, by changing the dimensions in the left - right direction (X - axis direction) of the spacers 85 and 86, the interval between the first lower surface support member 83 and the second lower surface support member 84 can be adjusted. In addition, in the screen mask support frame 80, by changing the dimensions in the front - rear direction (Y - axis direction) of the first side support members 91, 91 and the second side support member 92, the interval between the first side support members 91, 91 and the second side support member 92 can be changed. Therefore, the screen mask support frame 80 can support screen masks M of various sizes. In addition, the screen mask support frame 80 has a pressing member 94 that presses the outer frame F against the mounting surface P of the first lower surface support member 83 and the second lower surface support member 84. In addition, in the screen mask support frame 80, the second side support member 92 has a leaf spring 93 that presses the outer frame F against the first side support members 91, 91. Therefore, the screen mask support frame 80 can position and support the screen mask M regardless of the tolerances of the respective components.

[0031] The interference object detection sensor 39 detects whether there is no interference object (for example, the third side portion 81c of the frame member 81, the first side support member 91, the outer frame F, etc.) below the pusher 34. The interference object detection sensor 39 is located in the head main body 31 at the same position in the front - rear direction (Y - axis direction) as the pusher 34, and is arranged at a position adjacent to the pusher 34 in the left - right direction (X - axis direction). In addition, as Figure 3 shown, the position of the interference object detection sensor 39 in the left - right direction in the head main body 31 is a position where the first side support member 91 on the left side in the figure can be detected. The interference object detection sensor 39 is, for example, a reflection - type optical sensor having a light - emitting element and a light - receiving element (not shown). As Figure 11A shown, when the light emitted from the light - emitting element of the interference object detection sensor 39 is not reflected by the interference object and is not received by the light - receiving element, the interference object detection sensor 39 outputs a signal indicating that no interference object is detected to the control device 100. On the other hand, as Figure 11BAs shown, if the light emitted from the light projecting element is reflected by the interfering object and received by the light receiving element, the interfering object detection sensor 39 outputs a signal indicating the detection of the interfering object to the control device 100.

[0032] As Figure 12 shown, the control device 100 is a computer mainly composed of a CPU 101, a ROM 102, a RAM 103, and a memory (such as an HDD or an SSD) 104. The control device 100 inputs detection signals from the interfering object detection sensor 39, the support frame detection sensor 47, etc. In addition, control signals are output from the control device 100 to the squeegee lifting part 33, the pusher lifting part 35, the Y-axis slider 38, the substrate transfer part 41, the substrate support member lifting part 43, the rack lifting part 53, the support frame front-rear moving part 54, etc.

[0033] Next, Figure 13 the operation of the printing machine 10 configured as described above will be described. In the present embodiment, the case of replacing the screen mask M between the printing machine main body 11 and the storage rack 60 will be described as an example. This routine is performed by the CPU 101 of the control device 100, for example, when changing the type of substrate to be produced in the production line. In addition, when this routine is executed, the pusher 34 is located at the upper end in the vertical direction (Z-axis direction). In addition, the screen mask M is mounted on the screen mask support frame 80 in a state where the four sides are supported by the first lower surface support member 83, the second lower surface support member 84, the first side support members 91, 91, and the second side support member 92. The first lower surface support member 83 and the second lower surface support member 84 select spacer members 85, 86 of a desired size as spacer members 85, 86 for mounting the first lower surface support member 83 and the lower surface support member 84 on the frame member 81 in such a manner that the interval between the first lower surface support member 83 and the second lower surface support member 84 becomes an interval corresponding to the size of the screen mask M in the left-right direction. In addition, the first side support members 91 and the second side support member 92 select the first side support members 91 and the second side support member 92 of a desired size in such a manner that the interval between the first side support members 91, 91 and the second side support member 92 becomes an interval corresponding to the size of the screen mask M in the front-rear direction.

[0034] When starting this routine, the CPU 101 controls the rack lifting section 53 so that the position of the support rail 61 of the empty layer in the storage rack 60 in the vertical direction (Z-axis direction) coincides with the position of the transfer rail 20 (S100). Next, the CPU 101 controls the Y-axis slider 38 so that the pusher 34 moves to the rear end (S105). Then, the CPU 101 controls the pusher lifting section 35 so that the pusher 34 descends (S110). And, the CPU 101 controls the Y-axis slider 38 so that the pusher 34 starts to move forward in the descended state (S115). When the pusher 34 moves forward, it abuts against the rear end of the frame member 81 of the screen mask support frame 80 (the side surface behind the third side portion 81c), and sends the screen mask support frame 80 forward.

[0035] Next, the CPU 101 waits for a predetermined time from when the screen mask support frame 80 is detected by the support frame detection sensor 47 provided at the through port 46 of the housing 12 (S120). Thereby, the screen mask support frame 80 is moved to a position where it can be stored inside the storage rack 60 by the support frame front-rear movement section 54. In addition, in the process of S115, the CPU 101 may also control the Y-axis slider 38 so that the pusher 34 moves to the front end in the front-rear direction. In this case, the process of S120 is not required. Then, the CPU 101 controls the Y-axis slider 38 so that the pusher 34 stops and the forward movement of the screen mask M ends (S125). And, the CPU 101 controls the pusher lifting section 35 so that the pusher 34 ascends (S130).

[0036] Next, the CPU 101 controls the support frame front-rear movement section 54 so that the screen mask support frame 80 is stored in the storage rack 60 (S135). Then, the CPU 101 controls the rack lifting section 53 so that the position of the support rail 61 of the screen mask M (screen mask support frame 80) to be replaced in the vertical direction (Z-axis direction) coincides with the position of the transfer rail 20 (S140). And, the CPU 101 controls the support frame front-rear movement section 54 to take out the screen mask support frame 80 from the storage rack 60 (S145).

[0037] Next, the CPU 101 waits until a signal indicating the detection of an interfering object is input from the interfering object detection sensor 39 (S150). After the process of S120, the head main body 31 (pusher 34, interfering object detection sensor 39) stands by near the front end in the front-rear direction. Therefore, the process of S150 monitors the rear end portion of the screen mask support frame 80 (the third side portion 81c of the frame member 81, the second side support member 91), and the outer frame F (interfering object) of the screen mask M passes through the through port 46 from the storage rack 60 and crosses the optical axis of the interfering object detection sensor 39. When a signal indicating the detection of an interfering object is input from the interfering object detection sensor 39, the frame member 81 of the screen mask support frame 80, the first side support member 91, the outer frame F of the screen mask M, etc. are in a state located below the pusher 34. Next, the CPU 101 waits until a signal indicating the non-detection of an interfering object is input from the interfering object detection sensor 39 (S155). When no signal indicating the detection of an interfering object is input from the interfering object detection sensor 39 anymore, the frame member 81 of the screen mask support frame 80, the first side support member 91, the outer frame F, etc. move to the rear of the pusher 34, and even if the pusher 34 is lowered, it does not interfere with the pusher 34. And the CPU 101 controls the support frame front-rear movement unit 54 to end the removal of the screen mask support frame 80 by the support frame front-rear movement unit 54 (S160).

[0038] Next, the CPU 101 controls the pusher lifting unit 35 to lower the pusher 34 (S165). Next, the CPU 101 controls the Y-axis slider 38 to move the screen mask support frame 80 in contact with the pusher 34 to the working position (printing area) (S170). Thus, the pusher 34 abuts against the outer frame F of the screen mask M supported by the screen mask support frame 80 from the inside. And the screen mask M is pressed by the pusher 34 and transported to the working position. And the CPU 101 controls the pusher lifting unit 35 to raise the pusher 34 (S175), ending this routine.

[0039] In the printing machine 10, the interfering object detection sensor 39 is used to determine whether there is an interfering object interfering with the pusher 34 when the pusher 34 is lowered, and the pusher 34 is lowered to a position where it does not interfere with the interfering object. Therefore, even if screen masks M of various sizes are installed on the screen mask support frame 80, the pusher 34 can abut against the screen mask M and the appropriate position of the screen mask support frame 80 to transport the screen mask M.

[0040] Here, the correspondence between the components of this embodiment and the components of the present disclosure is clarified. The screen mask support frame 80 of this embodiment corresponds to the screen mask support frame of the present disclosure, the frame member 81 corresponds to the frame member, the first lower surface support member 83 and the second lower surface support member 84 correspond to the first mask support portion, and the two first side support members 91, 91 and the second side support member 92 correspond to the second mask support portion. In addition, the spacers 85, 86 correspond to the spacers. Furthermore, the placement surface P corresponds to the placement surface, and the pressing member 94 (the first to fourth pressing members 94a to 94d) corresponds to the pressing member. In addition, the leaf spring 93 corresponds to the biasing member. In addition, the printing machine 10 corresponds to the printing machine, the transfer rail 20 corresponds to the rail, the screen mask M corresponds to the screen mask, the interference detection sensor 39 corresponds to the detection sensor, the pusher 34 corresponds to the abutting portion, the pusher lifting portion 35 corresponds to the lifting portion, the head moving portion 36 corresponds to the moving portion, and the CPU 101 that executes the processes of S150 to S170 corresponds to the control portion.

[0041] In the screen mask support frame 80 described in detail above, the interval between the first lower surface support member 83 and the second lower surface support member 84 and the interval between the first side support members 91, 91 and the second side support member 92 can be adjusted. Therefore, it can be set to support screen masks M of different sizes.

[0042] In the screen mask support frame 80, the lower surface support member 82 (the first lower surface support member 83, the second lower surface support member 84) can be mounted on the first side portion 81a and the second side portion 81b with the spacers 85, 86 interposed therebetween. Thereby, the interval between the first lower surface support member 83 and the second lower surface support member 84 can be adjusted relatively easily.

[0043] In the screen mask support frame 80, the lower surface support member 82 has: a placement surface P on which two sides of the outer frame F of the screen mask M extending in the front-rear direction are placed; and a pressing member 94 that can move between an entry position R2 where it enters the inside of the frame member 81 and a retracted position R1 where it retracts from the inside of the frame member 81, and presses the outer frame F of the screen mask M placed on the placement surface P against the placement surface P at the entry position R2. Thereby, the screen mask M can be supported in a stable state.

[0044] In the screen mask support frame 80, the first lower surface support member 83 and the second lower surface support member 84 have a placement surface P on which two sides of the upper edge of the outer frame F of the screen mask M are placed and extend in the front-rear direction. The first side support members 91, 91 and the second side support members 92 are in contact with and support the sides of the two sides of the outer frame of the screen mask M that extend in the left-right direction (X-axis direction). Thereby, the screen mask M can be supported in a stable state. In addition, a leaf spring 93 that presses the outer frame F of the screen mask M relative to the first side support members 91, 91 is provided on the second side support member 92. Thereby, the screen mask support frame 80 can position and support the screen mask M regardless of tolerances of various components and the like.

[0045] In this printing machine, a plurality of screen masks M of different sizes can be used in the printing machine by using the screen mask support frame 80. In addition, the pusher 34 can be made to contact at an appropriate position, and the screen mask support frame 80 on which the screen mask M is mounted can be transported by using the pusher 34.

[0046] Furthermore, the present disclosure is not limited to any of the above-described embodiments, and can of course be implemented in various ways as long as it belongs to the technical scope of the present disclosure.

[0047] In the above-described embodiment, the printing machine of the present disclosure is applied to print solder, which is a viscous fluid, onto a substrate S as an object. However, as the object, other substrates such as three-dimensional objects may also be used, and as the viscous fluid, conductive paste, adhesive, etc. may also be used.

[0048] In the above-described embodiment, only two first side support members 91, 91 are provided on the side in front of the third side portion 81c. However, three or more first side support members may be provided, or only one first side support member may be provided.

[0049] In the above-described embodiment, only one second side support member 92 is provided substantially at the center of the side behind the fourth side portion 81d. However, two or more second side support members 92 may be provided.

[0050] In the above-described embodiment, the leaf spring 93 is provided on the second side support member 92. However, the leaf spring 93 may also be provided on the first side support members 91, 91.

[0051] In the above-described embodiment, the first lower surface support member 83 and the second lower surface support member 84 are respectively mounted on the first side portion 81a and the second side portion 81b with spacers 85 and 86 interposed therebetween. However, the first lower surface support member 83 and the second lower surface support member 84 may also be directly mounted on the first side portion 81a and the second side portion 81b without the spacers 85 and 86 interposed therebetween. In this case, a plurality of first lower surface support members 83 and second lower surface support members 84 are prepared in different sizes, and the first lower surface support member 83 and the second lower surface support member 84 are replaced according to the size of the outer frame F of the screen mask M, so that the interval between the first lower surface support member 83 and the second lower surface support member 84 in the left-right direction (X-axis direction) can be adjusted.

[0052] In this specification, the technical idea of changing "the screen mask support frame according to claim 1 or 2" to "the screen mask support frame according to any one of claims 1 to 3" in the original claim 4 is also disclosed. Industrial Applicability

[0053] The present disclosure can be used in the manufacturing industry of printing machines and the like. Description of Reference Numerals

[0054] 10 Printing press, 11 Printing press main body, 12 Housing, 20 Conveyor track, 30 Head device, 31 Head main body, 32 Squeegee, 33 Squeegee lifting part, 34 Pusher, 35 Pusher lifting part, 36 Head moving part, 37 Guide rail, 38 Y-axis slider, 39 Obstacle detection sensor, 40 Substrate conveyor device, 41 Substrate conveyor part, 42 Substrate support member, 43 Substrate support member lifting part, 46 Through hole, 47 Support frame detection sensor, 50 Replacement device, 51a Left unit, 51b Right unit, 52 Frame support member, 53 Frame lifting part, 54 Support frame front and back moving part, 60 Storage rack, 61 Support track, 62 Opening part, 63 Opening part, 80 Screen mask support frame, 81 Frame member, 81a First side part, 81b Second side part, 81c Third side part, 81d Fourth side part, 82 Lower surface support member, 83 First lower surface support member, 84 Second lower surface support member, 85 Spacer, 86 Spacer, 87 Bracket, 88 Bracket, 89 Mounting screw, 90 Side support member, 91 First side support member, 92 Second side support member, 93 Leaf spring, 94 Pressing member, 94a First pressing member, 94b Second pressing member, 94c Third pressing member, 94d Fourth pressing member, 95 Pressing member main body, 96 Pressing screw, 96a Flange, 97 Fixing screw, 98a, 98b, 98c, 98d Rotating shaft, 100 Control device, 101 CPU, 102 ROM, 103 RAM, 104 Memory, B Mask main body, F Outer frame, M Screen mask, P Placement surface, R1 Retracted position, R2 Entering position, S Substrate.

Claims

1. A screen mask support frame for use in a printing machine that prints a viscous fluid onto an object using a screen mask with a mask body fixed to an outer frame, and is used to support the screen mask that is smaller in size than the size that can be configured in the printing machine. The screen mask support frame includes: A frame member having a size that can be configured in the printing machine; A pair of first mask support portions provided inside opposite sides of the frame member to support opposite sides of the outer frame of the screen mask; and The pair of second mask support portions provided inside the other two sides of the frame member that are orthogonal to the one pair of sides to support the other two sides of the outer frame of the screen mask that are orthogonal to the one pair of sides, Among them, wherein the intervals between the pair of first mask support portions and the intervals between the pair of second mask support portions can be adjusted.

2. The screen mask support frame according to claim 1, wherein The pair of first mask support portions can be mounted on the frame member with a spacer therebetween.

3. The screen mask support frame according to claim 1 or 2, wherein The first mask support portion has: A placement surface for placing opposite sides of the outer frame of the screen mask; And A pressing member that can change between a state of entering the inside of the frame member and a state of retracting from the inside of the frame member, and presses the outer frame of the screen mask placed on the placement surface against the placement surface in the entering state.

4. The screen mask support frame according to claim 1 or 2, wherein The pair of first mask support portions have a placement surface for placing opposite sides of the outer frame of the screen mask, The pair of second mask support portions abut against and support the sides of the other two sides of the outer frame of the screen mask.

5. The screen mask support frame according to claim 4, wherein A biasing member that presses the outer frame of the screen mask from one side of the pair of second mask support portions toward the other side is provided on one of the pair of second mask support members.

6. A printing machine that prints a viscous fluid onto an object using a screen mask with a mask body fixed to an outer frame, The printing machine includes: A pair of tracks extending into the printing area; A screen mask is supported by a screen mask support frame. The screen mask support frame includes: a frame member sized to be disposed on the pair of tracks; A pair of first mask support portions provided inside opposite sides of the frame member to support opposite sides of the outer frame of the screen mask; And the pair of second mask support portions provided inside the other two sides of the frame member that are orthogonal to the one pair of sides to support the other two sides of the outer frame of the screen mask that are orthogonal to the one pair of sides from the side, wherein the intervals between the pair of first mask support portions and the intervals between the pair of second mask support portions can be adjusted; A detection sensor that can detect whether there is an interfering object between the pair of tracks; A contact portion disposed above the pair of tracks; A lifting portion that lifts and lowers the contact portion; A moving portion that moves the contact portion along the extending direction of the pair of tracks; and The control unit controls the lifting unit to lower the abutting portion in a state where the interference portion of the screen mask support frame is not detected below the abutting portion by the detection sensor, and then controls the moving unit to move the abutting portion in the extending direction in a state where the abutting portion has been lowered.

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