Feeding device for a viscous fluid and component placement device

Abstract

Feeding device (1, 200) for a viscous fluid, comprising a plate (2, 210) on which a viscous fluid can be spread, a doctor blade (3, 220) which can be arranged to slide over the plate (2, 210) in order to smooth the viscous fluid thereon, a doctor blade holding section (5, 230) on which the doctor blade (3, 220) can be installed, and a doctor blade detection section (8, 241, 242), wherein the doctor blade holding section (5, 230) has a restriction section (52, 232) by means of which a movement of the doctor blade (3, 220) in a direction (B1) parallel to a pressure direction (B2) against the plate (2, 210) can be restricted, wherein it can be detected by means of the doctor blade detection section (8, 241) whether the doctor blade (3, 220) is installed and whether the movement of the squeegee (3, 220) is restricted by the constraint section (52, 232).

Description

Technical field The present invention relates to a feeding device for a viscous fluid and a component placement device. General state of the art Feeding devices for viscous fluids, such as flux or solder paste, are known from the prior art. One such feeding device for a viscous fluid is disclosed, for example, in US patent US 6,293,317 B1. US patent 6,293,317 B1 discloses a feeding device for a viscous fluid, comprising a base plate for spreading the viscous fluid, a container (a squeegee) for smoothing the viscous fluid on the base plate, and a sliding section that keeps the container movable. JP 2007-294 776 A discloses a flux transfer device for transferring flux, which is fed from a flux supply part to a flat plate by means of a doctor blade, by moving the flat plate and the doctor blade relative to each other by a drive source and transferring the flux to the projection electrode of an electronic component held by a suction nozzle. The device is designed to prevent the plate and the doctor blade from moving relative to each other when the electronic component falls onto the plate, thus preventing the electronic component from being trapped between the doctor blade and the plate and damaging either part.DE 10 2013 209 963 A1 discloses an arrangement for applying a powder with a process chamber, a coating platform located in the process chamber, and a doctor blade device with a doctor blade element located in the process chamber for applying a powder, in particular a metal or ceramic powder. The arrangement includes an exchange device suitable for replacing at least one section of the doctor blade element with another section of the same doctor blade element or for replacing the entire doctor blade element with another doctor blade element within the process chamber and with the process chamber closed. Brief description of the invention Object of the present invention However, since the viscous fluid feeder of US patent US 6,293,317 B1 cannot detect whether the container (the doctor blade) is held against the sliding section, the problem arises that it is difficult to prevent the container from being accidentally left out. If the container is not installed, viscous fluid leaks into the interior of the device when the viscous fluid is fed in. The invention was made to solve the above-mentioned problem, and a first objective of the invention is to provide a feeding device for viscous fluid and a component placement device in which accidental failure to install the doctor blade can be prevented. The problem is solved by means of the feeding device and the component placement device according to the respective independent claims. Preferred embodiments are specified in the respective dependent claims. Means of solving the task A feeding device for a viscous fluid according to a first aspect of the invention comprises a plate on which a viscous fluid can be spread, a squeegee that slides over the plate to smooth the viscous fluid on it, a squeegee holding section on which the squeegee is installed, and a squeegee detection section that detects whether the squeegee is installed or not. In the feeding device for viscous fluid according to the first aspect of the invention, a squeegee detection section is provided, as described above, to detect whether the squeegee is installed or not, so that accidental failure to install the squeegee can be prevented. This prevents viscous fluid from leaking into the device when viscous fluid is supplied in the state without a squeegee installed. In the feeding device for viscous fluid according to the first aspect of the invention, the doctor blade holding section preferably has a restriction section that limits movement of the doctor blade in a direction parallel to a pressure direction against the plate, wherein the doctor blade detection section detects whether the doctor blade is installed and whether the movement of the doctor blade is restricted by the restriction section. Since such a design prevents accidental failure to restrict the movement of the doctor blade by the restriction section, it prevents the doctor blade from moving away from the plate due to an accidental failure to restrict its movement by the restriction section. In this case, the squeegee detection section preferably comprises an illumination section and a light-receiving section, wherein the squeegee holding section has a switching section that toggles the arrival of light from the illumination section at the light-receiving section. Depending on a restriction state, in which the movement of the squeegee is restricted by the restriction section, and an release state, in which the restriction of the movement of the squeegee by the restriction section is lifted, the switching section switches the arrival of light from the illumination section at the light-receiving section. By allowing, blocking, or reflecting the light from the illumination section through the switching section according to this design, it can be easily detected whether the squeegee is installed and in the restriction state. In the embodiment where the squeegee holding section includes the switching section, it is preferred that the switching section, when the restriction section switches between the restriction state and the release state, controls the arrival of light from the illumination section at the light receiving section by means of a movement. Since, in this embodiment, the switching section is moved by the restriction section in conjunction with the switching between the restriction state and the release state, the switching section can easily control the arrival of light from the illumination section at the light receiving section, depending on the restriction state and the release state. In this case, the doctor blade holding section preferably has a rotary bearing section that rotatably supports the restricting section. The switching section moves such that, in the release state, the restricting section approaches the rotary bearing section, and in the restricted state, the restricting section moves away from the rotary bearing section. With this design, the restriction of the doctor blade's movement can be easily switched on and off by rotating the restricting section. Furthermore, since the distance between the restricting section and the rotary bearing section can be changed according to the restricted and release states, the switching section can be easily moved accordingly. In the embodiment where the doctor blade retainer section includes the restricting section, a pressure force generation mechanism is preferably provided. This mechanism moves towards the restricting section and generates a pressure force of the doctor blade against the plate. The pressure force generation mechanism generates pressure when the doctor blade detection section detects that the movement of the doctor blade is restricted by the restricting section. Since this embodiment allows a pressure force to be exerted even when the restricting section is limiting the movement of the doctor blade, a reliable pressure force on the doctor blade can be ensured. When the restriction of the doctor blade by the restricting section is switched on and off, the pressure force generation mechanism does not generate pressure, allowing the restricting section to move freely and the restriction of the doctor blade to be easily switched on and off. The feeding device for viscous fluid according to the first aspect preferably further comprises a supply section that feeds viscous fluid to the plate, wherein the supply section does not feed viscous fluid if the doctor blade detection section does not detect that the doctor blade is installed. This design prevents viscous fluid from escaping into the device, since viscous fluid is supplied when the doctor blade is installed. A component placement device according to a second aspect of the invention comprises a placement section that places a component on a substrate and a viscous fluid feed section that supplies viscous fluid to the component, wherein the viscous fluid feed section comprises a plate on which a viscous fluid can be spread, a squeegee that slides over the plate to smooth the viscous fluid on it, a squeegee holding section on which the squeegee is installed, and a squeegee detection section that detects whether the squeegee is installed or not. In the component placement device for viscous fluid according to the second aspect of the invention, a squeegee detection section is provided, as described above, to detect whether the squeegee is installed or not, thus preventing accidental squeegee failure to install it. This allows for a component placement device with a viscous fluid feed section, preventing viscous fluid from leaking into the device when the squeegee is not installed. Effect of the invention The present invention prevents the squeegee from being accidentally left uninstalled. Brief description of the characters The figures show: Fig. 1 a schematic top view of a component placement device according to a first embodiment of the present invention; Fig. 2 a schematic view illustrating a sequence of placement operations of the component placement device of the first embodiment of the present invention; Fig. 3 a perspective view of a flux supply device of the first embodiment of the present invention; Fig. 4 a perspective view of a doctor blade of the flux supply device according to the first embodiment of the present invention; Fig. 5 a perspective view of a drive mechanism of the doctor blade of the flux supply device according to the first embodiment of the present invention; Fig. 6 a side view of a state in which the doctor blade of the flux supply device is restricted, according to the first embodiments of the present invention; Fig.Fig. 7 shows a side view of a state in which the doctor blade of the flux supply device is released, according to the first embodiments of the present invention; Fig. 8 shows a side view of a state in which the doctor blade of the flux supply device is not arranged, according to the first embodiments of the present invention; Fig. 9 shows a perspective view of a flux supply device of a second embodiment of the present invention; Fig. 10 shows a perspective view of a doctor blade of the flux supply device according to the second embodiment of the present invention; Fig. 11 shows a side view of a state in which the doctor blade of the flux supply device is restricted, according to the second embodiments of the present invention; and Fig. 12 shows a side view of a state in which the doctor blade of the flux supply device is released, according to the second embodiments of the present invention. Embodiments of the invention In the following, embodiments of the present invention will be described with reference to the figures. First embodiment (Design of the component placement device) Referring to Fig. 1 and Fig. 2, the structure of a component placement device 100 according to a first embodiment of the present invention is now described. The component placement device 100 is a so-called multi-purpose component placement device that can remove a bare chip (semiconductor chip) C from a diced wafer W and populate a component area of ​​a substrate S with it, and can populate the component area of ​​a substrate S with an electronic component (a so-called packaged component) or the like, supplied by a tape feeder 13a. The bare chip C is an example of a component of the present invention. As shown in Fig. 1, the component placement device 100 comprises a frame 10, a control section 11, a conveyor belt 22, two chip component feeding sections 13, two placement sections 14, a wafer holding table 15, a removal section 16, a component recognition camera 17, a fixed camera 18, and a wafer receiving section 19. Furthermore, a flux supply device 1 is provided on the component placement device 100. The flux supply device 1 is an example of a viscous fluid supply device and a viscous fluid supply section of the present invention. Control section 11 is designed to control the operation of all sections of the component placement device 100. More specifically, control section 11 is designed to control the operation of the conveyor belt 22, the chip component feed sections 13, the placement sections 14, the wafer holding table 15, the removal section 16, the component recognition camera 17, the fixed camera 18, the wafer receiving section 19, the flux supply device 1, and the like. Control section 11 controls the operation of the individual elements based on output signals from a position detection device, such as a sensor, which is integrated into a drive motor of the individual elements. Furthermore, control section 11 performs the function of image acquisition control for the individual cameras (component recognition camera 17 and fixed camera 18) and image recognition. The conveyor belt 22 is designed to transport a substrate S to and from a specific placement position. Furthermore, the conveyor belt 22 comprises a pair of conveyor rails extending in the X-direction and a positioning mechanism (not shown) that positions the substrate S at a specific location. Thus, the conveyor belt 22 transports the substrate S in the X-direction and positions and fixes the substrate S at the specified placement position. The two chip component feed sections 13 are each located at both ends in front of the component placement device 100 (on the side of the Y1 direction). The tape feed devices 13a are arranged along the chip component feed sections 13 in the X direction. The tape feed devices 13a convey a carrier tape at intervals and feed electronic components in the carrier tape to a specific component placement position. The placement sections 14 are designed to populate the substrate S with the electronic components and bare chips C from the wafer W, which are fed by the chip component feed sections 13. More precisely, the placement sections 14 are supported by an XY motion mechanism such that they can move horizontally (XY direction) above the conveyor belt 22 (substrate S). The placement sections 14 have several (two) suction nozzles 14a arranged in the X direction (see Fig. 2). The placement sections 14 are designed such that a bare chip C, removed from the wafer W by the removal section 16, is drawn in by the suction nozzles 14a to place it on the substrate S. Furthermore, the placement sections 14 are designed such that an electronic component fed by the belt feeder 13a is drawn in by the suction nozzles 14a to place it on the substrate S. The wafer holding table 15 is designed such that a wafer W, which is pulled out of the wafer receiving section 19 by a withdrawal mechanism (not shown), is carried at a specific position. The removal section 16 is configured to remove a bare chip C from the wafer W and transfer it to a placement section 14. Furthermore, the removal section 16 is moved horizontally (XY direction) at a position above the wafer holding table 15 by a specific drive mechanism. The removal section 16 also includes four wafer heads 16a. The wafer heads 16a are designed to rotate around the X-axis and to be moved vertically (raised and lowered). Furthermore, the wafer heads 16a are designed to suction the bare chip C. The removal section 16 is designed such that the bare chip C, raised by a projection P (not shown), is suctioned and removed by the wafer heads 16a, flipped over, and then transferred to the placement section 14 (suction nozzle 14a) at a specific transfer position. Before the bare chip C is removed from the wafer W, the component recognition camera 17 takes an image of the bare chip C to be removed. The component recognition camera 17 is integrated into a common frame with the removal section 16. Furthermore, the component recognition camera 17 is moved horizontally (XY direction) above the wafer holding table 15 by a specific drive mechanism. The fixed camera 18 is installed on the frame 10 within a movement range of the assembly sections 14. The fixed camera 18 is designed such that it captures the electronic component (or the bare chip C), which has been drawn in through the suction nozzles 14a of the assembly sections 14, from below. The wafer receiving section 19 is designed to accommodate multiple diced or sliced ​​wafers W. The naked chips C of wafer W are, for example, naked chips for flip-chip assembly, with raised areas on their electrodes. In this case, the naked chips C are held in place by adhesive bonding them to a foil-shaped wafer web, such that their raised area (assembly surface) faces upwards. The flux supply device 1 is designed to transfer (apply) flux to the raised areas of the bare chip C by means of lithography. More precisely, the flux supply device 1 feeds flux and spreads it thinly on the plate 2. The bare chip C, which is drawn in by the suction nozzles 14a of the assembly sections 14, is then brought into contact with the spread flux. This results in a lithographic transfer of the flux to the raised areas of the bare chip C. The flux is applied to the raised areas of the bare chip C in such a way as to ensure good wetting of the solder. Description of the component placement process Next, with reference to Fig. 2, a placement process for an electronic component using the component placement device 100 is described. As shown in Fig. 2, to place a naked chip C from the wafer W onto the substrate S, a naked chip C is first removed for placement using the removal section 16 and the naked chip C is drawn in and held by the wafer heads 16a of the removal section 16. The wafer heads 16a are rotated so that the naked chip C is flipped and positioned in a specific transfer position. Accordingly, the suction nozzles 14a of the placement section 14 are lowered into the transfer position and draw in the naked chip C. After the bare chip C is drawn in, the assembly section 14 is moved over the flux supply device 1. The suction nozzles 14a of the assembly section 14 are lowered to the height required for lithographic transfer, and the flux is lithographically transferred (applied) to the bump formation surface of the bare chip C. The assembly section 14 is then repositioned so that it moves over the fixed camera 18, and the bump formation surface of the bare chip C, drawn in by the suction nozzles 14a, is recorded. In this way, a defect assessment of the bump formation surface is performed, or an incorrect suction position of the bare chip C is determined. The sequence of the lithography process and the recording process can also be reversed. That is, if the condition before the lithographic transfer can be better recorded (detected by means of image recognition), the recording process is performed first. After pickup, the placement section 14 is moved over the substrate S held by the conveyor belt 22, and at a specific placement position the suction nozzles 14a are lowered to the placement height, and the bare chip C is positioned on the substrate S (this is thus populated). During placement of the component fed by the belt feeder 13a (see Fig. 1), the placement section 14 is moved over a specific component removal position of the belt feeder 13a. The suction nozzles 14a are then lowered, and the electronic component is removed. The placement section 14 is then repositioned so that it moves over the fixed camera 18, and a photograph of the underside of the electronic component picked up by the suction nozzles 14a is taken. The placement section 14 is then moved over the substrate S. Subsequently, the suction nozzles 14a are lowered, and the electronic component is positioned on the substrate S (thus being placed on it). If the bare chips C are fed individually in the carrier belt by the belt feeder 13a, after removal of the bare chip C from the belt feeder 13a, the following occurs as shown in Fig.Figure 2 shows the lithographic transfer and the recording being carried out, after which the naked chip C is then placed on the substrate S (which is thus equipped). Design of the flux supply device Referring to Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. 8, the structure of the flux supply device 1 according to the first embodiments of the present invention is now described. As shown in Fig. 3, the flux supply device 1 comprises a plate 2, a doctor blade 3, a frame section 4, a doctor blade holding section 5, a flux dispensing section 6, a sensor 7, and a doctor blade detection section 8. The flux dispensing section 6 is an example of the supply section of the present invention. The plate 2 comprises a recessed section 21. The doctor blade 3 comprises, as shown in Fig. 4, a pair of doctor blade sections 31, a pair of wall sections 32, a pair of plate-shaped sections 33, a pair of pins 34 for restriction in the sliding direction, and a pair of pressure sections 35. The frame section 4 comprises, as shown in Fig. 5, a motor 41, a belt 42, and a plate positioning section 43. The doctor blade holding section 5 comprises, as shown in Fig. 4, sections 51 for restriction in the feed direction, sections 52 for restriction in the pressure direction, a coupling section 53, a rotary bearing section 54, a piston section 55, and a pneumatic cylinder 56. The doctor blade capturing section 8 comprises, as shown in Fig. 3, an illumination section 8a and a light-receiving section 8b.Sections 52 for restriction in the pressure direction are an example of the restriction section of the present invention, and the pneumatic cylinder 56 is an example of the pressure force generation mechanism of the present invention. The sections 52 for restricting the pressure direction, as shown in Fig. 4, comprise a squeegee locking section 521, a rotary bearing recess section 522, piston engagement holes 523 and 524, and a locking pin 525. A compressed air generation section 561 and a regulator 562 are connected to the pneumatic cylinder 56. The locking pin 525 is an example of the switching section of the present invention. On the outside of the sections 52 for restricting the pressure direction, an operating section for an operator is formed on the upper section, and an L-shaped operating lever is provided. As shown in Fig. 3, the plate 2 is designed such that flux is spread on it. The plate 2 extends in a direction A parallel to the sliding direction of the doctor blade 3. The recessed section 21 of the plate 2 is recessed to a specific depth. This ensures that the flux is spread at approximately the same height within the recessed section 21. As shown in Fig. 3, the doctor blade 3 is designed to move in order to smooth the flux on the plate 2. More precisely, the doctor blade 3 is designed such that, when pressed against the plate 2 in direction B (direction B2), it moves in direction A (direction A1 and direction A2). As shown in Fig. 4, the doctor blade sections 31 of the doctor blade 3 are arranged in pairs in direction A1 and direction A2. The pair of doctor blade sections 31 is coupled by the pair of wall sections 32, which are arranged at both ends horizontally and orthogonally to direction A. That is, the pair of doctor blade sections 31 and the pair of wall sections 32 are coupled to each other in a frame-like manner. By moving the squeegee sections 31, they smooth the flux in the feed direction (direction A1 or direction A2) on the plate 2. The plate-shaped sections 33 are each provided on the outside of the pair of wall sections 32. The pins 34 for restricting movement in the sliding direction and the pressure sections 35 are provided on each pair of plate-shaped sections 33. The pins 34 for restricting movement in the sliding direction are designed to project outwards from the plate-shaped sections 33. The pins 34 for restricting movement in the sliding direction are designed to engage the sections 51 for restricting movement in the feed direction of the doctor blade holder section 5 and transmit a force acting in the sliding (feed) direction to the doctor blade 3. The pressure sections 35 are designed such that they project outwards from the plate-shaped sections 33. The pressure sections 35 are designed such that they engage with the sections 52 to restrict the pressure direction of the doctor blade holding section 5 and exert a force (pressure force) on the doctor blade 3 acting in the pressure direction (direction B2). As shown in Fig. 3, the frame section 4 is equipped such that the plate 2 is installed on it and it moves the doctor blade 3 via the doctor blade holder section 5. More precisely, as shown in Fig. 5, the belt 42 is driven by the motor 41 of the frame section 4. The belt 42 rests against the doctor blade holder section 5 and moves the doctor blade holder section 5 in direction A. The plate 2 is positioned by the plate positioning section 43 of the frame section 4, and the frame section 4 is designed such that the plate 2 is installed on it. The doctor blade holding section 5 is designed such that the doctor blade 3 is installed on it. More precisely, the doctor blade holding section 5 is designed such that it holds the doctor blade 3. The doctor blade holding section 5 is designed such that it restricts movement in direction B parallel to the pressure direction of the doctor blade 3 and also restricts movement in direction A parallel to the feed direction (sliding direction) of the doctor blade 3. The sections 51 for restricting the feed direction of the doctor blade holder section 5 are designed such that they restrict movement in direction A parallel to the sliding direction of the doctor blade 3. The sections 51 for restricting the feed direction are provided in pairs and are oriented horizontally orthogonal to direction A. That is, the sections 51 for restricting the feed direction are provided in pairs such that the doctor blade 3 is located between them. Furthermore, the sections 51 for restricting the feed direction are attached to the base section 5a. The sections 51 for restricting the feed direction have the form of a slot open in the upward direction (direction B1). The slot shape of the sections 51 for restricting the feed direction is designed such that the pins 34 for restricting the sliding direction of the doctor blade 3 are inserted therein.By bringing the pins 34, which restrict movement in the sliding direction, into contact with the sections 51, which restrict movement in the feed direction, the movement of the doctor blade 3 (pins 34, which restrict movement in the sliding direction) is restricted in the sliding direction. Therefore, when the doctor blade holding section 5 moves in direction A, the doctor blade 3 also moves (slides) in direction A. The sections 52 for restricting movement in the pressure direction are designed such that the movement of the squeegee 3 in direction B (direction B1) is restricted parallel to the pressure direction towards the plate 2. The sections 52 for restricting movement in the pressure direction are provided in pairs and are oriented horizontally orthogonal to direction A. That is, the sections 52 for restricting movement in the pressure direction are provided in pairs such that the squeegee 3 is located between them. Furthermore, the sections 52 for restricting movement in the pressure direction are provided separately from the sections 51 for restricting movement in the feed direction. In a state where the restriction by the sections 52 for restricting movement in the pressure direction is lifted, the doctor blade 3 is removed by moving in direction B (direction B1). The sections 52 for restricting movement in the pressure direction are also designed such that they move relative to the doctor blade 3 in direction A (horizontal direction) and restrict the movement of the doctor blade 3 in direction B (vertical direction). More precisely, the pair of sections 52 for restricting movement in the pressure direction is coupled to each other by the coupling section 53. The sections 52 for restricting movement in the pressure direction are also rotatably mounted by the rotary bearing section 54.By rotating the sections 52 for limiting the pressure direction around the rotary bearing section 54 as the center of rotation, the doctor blade locking section 521 is moved in direction A, thereby locking the doctor blade 3 (limiting its movement in direction B1). Since the pair of sections 52 for limiting the pressure direction is coupled to each other by the coupling section 53, when one section 52 for limiting the pressure direction moves in direction A, the other section 52 for limiting the pressure direction also moves in direction A. The doctor blade locking section 521 of the sections 52, used for restricting movement in the pressure direction, engages the pressure sections 35 of the doctor blade 3 and restricts the movement of the doctor blade 3 in direction B while transmitting pressure force to the doctor blade 3. At the front end of the doctor blade locking section 521, which engages the pressure sections 35, an inclined section 521a is formed, the size of which changes in direction B and in direction A (see Fig. 6). The doctor blade locking section 521 of the sections 52, used for restricting movement in the pressure direction, is designed such that it lifts onto the pressure sections 35 and locks the doctor blade 3 (restricting its movement in direction B). The rotary bearing recess section 522 of the sections 52 for restriction in the pressure direction is provided with a recess to be supported by the rotary bearing section 54. The sections 52 for restriction in the pressure direction are designed such that the rotary bearing recess section 522 comes into contact with the rotary bearing section 54 when the locking mechanism of the doctor blade 3 is released (the restriction in direction B is released). That is, when the locking mechanism of the doctor blade 3 by the sections 52 for restriction in the pressure direction is released, the sections 52 for restriction in the pressure direction rotate about the rotary bearing section 54 as the center of rotation. Conversely, when the doctor blade 3 is locked (restricted in direction B), the rotary bearing recess section 522 moves away from the rotary bearing section 54 in direction B (direction B1). The piston engagement holes 523 and 524 of the sections 52 for restricting movement in the pressure direction are designed such that they engage with the piston section 55 and prevent the movement (rotation) of the sections 52 for restricting movement in the pressure direction in direction A. Thus, when the sections 52 for restricting movement in the pressure direction restrict the movement of the doctor blade 3 in direction B, the piston section 55 engages in the piston engagement hole 523 and restricts the movement of the sections 52 for restricting movement in the pressure direction in direction A. Conversely, when the restriction of the movement of the doctor blade 3 in direction B by the sections 52 for restricting movement in the pressure direction is lifted, the piston section 55 engages in the piston engagement hole 524 and restricts the movement of the sections 52 for restricting movement in the pressure direction in direction A. In the first embodiment, two locking pins 525 are provided on one of the pair of sections 52 to restrict movement in the contact direction. The locking pins 525 are arranged at a specific distance on the top side of the coupling section 53 (side facing B1). The locking pins 525 are configured to switch the incidence of light (visible or infrared light) from the illumination section 8a at the light-receiving section 8b. More precisely, the locking pins 525 are configured to either allow or block the light (visible or infrared light) from the illumination section 8a to the light-receiving section 8b.The blocking pins 525 are thus designed in such a way that, depending on the restriction state in which the movement of the squeegee 3 is restricted by the sections 52 in the direction of pressure, and the release state in which the restriction of the movement of the squeegee 3 by the sections 52 in the direction of pressure is lifted, they switch the arrival of light from the illumination section 8a at the light receiving section 8b. More precisely, the design is such that the locking pins 525 move in the pressure direction when switching between the restriction state and the release state of the sections 52 for restriction, in order to switch the arrival of light from the illumination section 8a at the light receiving section 8b. That is, the locking pins 525 move such that, in the release state, the sections 52 for restriction are close to the rotary bearing section 54 in the pressure direction, and, in the restriction state, the sections 52 for restriction are away from the rotary bearing section 54 in the pressure direction. When, as shown in Fig. 6, the doctor blade 3 is locked in the pressure direction by the sections 52 (its movement in direction B is restricted), the light from the illumination section 8a passes through the gap between the locking pins 525 and the coupling section 53 and reaches the light-receiving section 8b. When, as shown in Fig. 7, the locking of the doctor blade 3 by the sections 52 in the pressure direction is released (its movement in direction B is restricted), the light from the illumination section 8a is blocked by the locking pins 525 and does not reach the light-receiving section 8b. By rotating the sections 52 in the pressure direction, no light from the illumination section 8a can pass through the gap between the locking pins 525 and the coupling section 53.As shown in Figure 8, when the squeegee 3 is not installed, the light from the illumination section 8a is blocked by the locking pins 525 and does not reach the light receiving section 8b. That is, by arranging the rotary bearing recess section 522 of the sections 52 close to the rotary bearing section 54 to restrict the light in the pressing direction, the light from the illumination section 8a cannot pass through the gap between the locking pins 525 and the coupling section 53. The pneumatic cylinder 56 is designed such that it is connected to the sections 52 for restriction in the contact direction and generates a contact force for the doctor blade 3 towards the plate 2. More precisely, the pneumatic cylinder 56 is designed such that it biases the coupling section 53, which couples the sections 52 to each other for restriction in the contact direction, in the contact direction (direction B2). The pneumatic cylinder 56 is designed such that it moves through the compressed air of the compressed air generation section 561 and generates a contact force for the doctor blade 3. The compressed air generated by the compressed air generation section 561 is adjusted to a desired pressure by a regulator 562. That is, by operating the regulator 562, the contact force of the doctor blade 3 against the plate 2 is adjusted. The contact force can be adjusted, for example, based on viscosity information for the flux. The flux dispensing section 6 is designed to supply flux to the upper surface of plate 2. More precisely, the flux dispensing section 6 is designed to supply flux to the frame formed by the doctor blade sections 31 and wall sections 32 of the doctor blade 3. Sensor 7 is designed to measure the amount of flux within the doctor blade 3. Sensor 7 includes, for example, an ultrasonic sensor. In the first embodiment, the squeegee detection section 8 is configured to detect whether the squeegee 3 is installed or not. More precisely, the squeegee detection section 8 is configured to detect whether the squeegee 3 is installed and whether the movement of the squeegee 3 is restricted in the pressure direction by the sections 52 (i.e., it is locked). When, as shown in Fig. 6, the squeegee 3 is locked in the pressure direction by the sections 52 (its movement in direction B is restricted), the light from the illumination section 8a is detected at the light-receiving section 8b. This detects that the squeegee 3 is locked by the squeegee holding section 5. When the squeegee 3 is locked (restricted in direction B), the pneumatic cylinder 56 generates a pressure force.This means that, based on the detection result at the light-receiving section 8b, the pneumatic cylinder 56 is actuated and a contact force is generated if the locking mechanism is engaged. If the restriction of the doctor blade 3 in direction B is released (the locking mechanism is released), the pneumatic cylinder 56 does not generate a contact force. If the doctor blade detection section 8 does not detect that the doctor blade 3 is installed, no flux is supplied from the flux output section 6. If, according to the detection result at light reception section 8b, light from illumination section 8a is not detected—that is, if the doctor blade 3 is either not installed at all or installed but not locked—the component placement device 100 does not activate the motor 41, even if, in automatic operation, activation of the motor 41 is intended to move the doctor blade 3 in direction A, but instead keeps it in the stopped position. Conversely, if, while the automatic operation of the component placement device 100 is stopped, light from illumination section 8a is not detected at light reception section 8b, automatic operation cannot be resumed even by pressing a switch to start the automatic operation of the component placement device 100. If light from illumination section 8a is not detected at light reception section 8b, a warning indicator for an error condition may also appear on a monitor (not shown). Effect of the first embodiment The following effects can be achieved with the first embodiment. In the first embodiment, as described above, the doctor blade detection section 8 is provided to detect whether the doctor blade 3 is installed or not, thus preventing accidental failure to install the doctor blade 3. This prevents flux from leaking into the device when flux is supplied while the doctor blade 3 is not installed. Furthermore, in the first embodiment, the squeegee detection section 8 is designed such that it detects whether the squeegee 3 is installed and whether the movement of the squeegee 3 is restricted by the sections 52 in the pressure direction. Since such a design prevents accidental failure to restrict the movement of the squeegee 3 by the sections 52 in the pressure direction, removal of the squeegee 3 from the plate 2 due to an accidental failure to restrict the movement of the squeegee 3 by the sections 52 in the pressure direction can be prevented. Furthermore, in the first embodiment, the locking pins 525 are designed such that, depending on the restricted state, in which the movement of the squeegee 3 is restricted by the sections 52 in the pressure direction, and the released state, in which the restriction of the movement of the squeegee 3 by the sections 52 in the pressure direction is lifted, they switch the arrival of light from the illumination section 8a at the light receiving section 8b. This allows the light from the illumination section 8 to pass through the locking pins 525, so that it can be easily determined whether the squeegee 3 is installed and in the restricted state. Furthermore, the first embodiment is designed such that the locking pins 525 move in the direction of pressure when switching between the restriction state and the release state of the sections 52, in order to switch the arrival of light from the illumination section 8a at the light receiving section 8b. Since, with this design, the locking pins 525 are moved in the direction of pressure in conjunction with the switching between the restriction state and the release state by the sections 52, the locking pins 525 can easily switch the arrival of light from the illumination section 8a at the light receiving section 8b, depending on the restriction state and the release state. Furthermore, in the first embodiment, the locking pins 525 move such that, in the release state, the sections 52 for restricting movement in the pressure direction are close to the rotary bearing section 54, and in the restricted state, the sections 52 for restricting movement in the pressure direction are farther away from the rotary bearing section 54. With this design, the restriction of the movement of the doctor blade 3 can be easily switched on and off by rotating the sections 52 for restricting movement in the pressure direction. Since, in addition, the distance of the sections 52 for restricting movement in the pressure direction to the rotary bearing section 54 can be changed depending on the restricted state and the release state, the locking pins 525 can be easily moved according to the respective state. In the first embodiment, when the doctor blade detection section 8 detects that the movement of the doctor blade 3 is restricted in the pressure direction by the sections 52, the pneumatic cylinder 56 generates a pressure force. Since this design allows a pressure force to be exerted in a state where the sections 52 restrict the movement of the doctor blade 3 in the pressure direction, a reliable pressure force on the doctor blade 3 can be ensured. When the restriction of the doctor blade 3 by the sections 52 is switched on and off, the pneumatic cylinder 56 does not generate a pressure force, allowing the sections 52 to move freely and the restriction of the doctor blade 3 to be easily switched on and off. If, in the first embodiment, the doctor blade detection section 8 does not detect that the doctor blade 3 is installed, the design is such that no flux is supplied from the flux dispensing section 6. Since flux is supplied when the doctor blade 3 is installed, this prevents flux from leaking into the device. Second embodiment Referring to Figures 9, 10, 11 to 12, a flux supply device 200 according to a second embodiment of the present invention is now described. Unlike the first embodiment, which has one doctor blade engagement section 8, the second embodiment has two doctor blade engagement sections 241 and 242. Design of the flux supply device As shown in Fig. 9, the flux feed device 200 comprises a plate 210, a doctor blade 220, a doctor blade holding section 230, and the doctor blade gripping sections 241 and 242. The flux feed device 200 is an example of a viscous fluid feed device and a viscous fluid feed section of the present invention. The plate 210 comprises a recessed section 211. The doctor blade 220 comprises, as shown in Fig. 10, a pair of doctor blade sections 221, a pair of coupling sections 222, a pair of plate-shaped sections 223, a pair of pins 224 for restricting movement in the sliding direction, and a pair of pressure sections 225. The doctor blade holding section 230 comprises sections for restricting movement in the feed direction 231, sections for restricting movement in the pressure direction 232, springs 233, and contact sections 234. The doctor blade detection section 241 comprises, as shown in Fig. 9, an illumination section 241a and a light-receiving section 241b. The doctor blade detection section 242 comprises an illumination section 242a and a light-receiving section 242b. The contact section 234 is an example of the switching section of the present invention. Plate 210 is designed in such a way that flux is spread on it. The plate 210 is formed extending in direction A parallel to the sliding direction of the doctor blade 220. The recessed section 211 of the plate 210 is recessed to a specific depth. This ensures that the flux is spread at approximately the same height within the recessed section 211. Furthermore, the plate 210 is designed to move in direction A (direction A1 and direction A2). The doctor blade 220 is designed to shift in order to smooth the flux onto the plate 210. More precisely, it is designed such that when the doctor blade 220 is in a pressing position in direction B (direction B2), the plate 210 moves in direction A (direction A1 and direction A2). That is, the doctor blade 220 moves relative to the plate 210 in direction A. As shown in Fig. 10, the doctor blade sections 221 of the doctor blade 220 are arranged in pairs in direction A1 and direction A2. The pair of doctor blade sections 221 is coupled by the pair of coupling sections 222, which are provided at both ends of each direction orthogonal to direction A. Furthermore, dam sections 221a (see Fig. 11) are provided at both ends of the doctor blade sections 221. In this way, when moving the doctor blade 220, the escape of flux at the end sections of the doctor blade sections 221 can be prevented.By moving the squeegee sections 221 relative to the plate 210, they smooth the flux in the feed direction (direction A1 or direction A2) on the plate 210. The plate-shaped sections 223 are each provided on the outside of the pair of coupling sections 222. The pins 224 for restricting movement in the sliding direction and the pressure sections 225 are provided on each pair of plate-shaped sections 223. The pins 224 for restricting movement in the sliding direction are designed to project outwards from the plate-shaped sections 223. The pins 224 for restricting movement in the sliding direction are designed to engage the sections 231 for restricting movement in the feed direction of the doctor blade retaining section 230 and restrict the movement of the doctor blade 220 in the sliding direction (feed direction). The pressure sections 225 are designed such that they project outwards from the plate-shaped sections 223. The pressure sections 225 are designed such that they engage with the sections 232 to restrict the pressure direction of the doctor blade holding section 230 and exert a force (pressure force) on the doctor blade 220 acting in the pressure direction (direction B2). The doctor blade holding section 230 is designed such that the doctor blade 220 is installed on it. More precisely, the doctor blade holding section 230 is designed such that it holds the doctor blade 220. The doctor blade holding section 230 is designed such that it restricts movement in direction B parallel to the pressure direction of the doctor blade 220 and also restricts movement in direction A parallel to the displacement direction (relative feed direction) of the doctor blade 220. The doctor blade holding section 230 is fixed at a specific position in direction A. More precisely, the doctor blade holding section 230 is designed such that the holding section 230b does not move in direction A (horizontal direction) with respect to the base 230a. In contrast, the holding section 230b is designed such that it moves in direction B1 (upward direction) with respect to the base 230a. The sections 231 for restricting the feed direction of the doctor blade holder section 230 are designed such that they restrict movement in direction A parallel to the sliding direction of the doctor blade 220. The sections 231 for restricting the feed direction are provided in pairs and are oriented horizontally orthogonal to direction A. That is, the sections 231 for restricting the feed direction are provided in pairs such that the doctor blade 220 lies between them. Furthermore, the sections 231 for restricting the feed direction are attached to the base 230a. The sections 231 for restricting the feed direction have the form of a slot open in the upward direction (direction B1). The slot shape of the sections 231 for restricting the feed direction is designed such that the pins 224 for restricting the sliding direction of the doctor blade 220 are inserted therein.By bringing the pins 224 into contact with the sections 231 for restricting movement in the feed direction in direction A, the movement of the doctor blade 220 (pins 224 for restricting movement in the sliding direction) is restricted in the sliding direction. The sections 232 for restricting movement in the pressure direction are designed such that the movement of the squeegee 220 in direction B (direction B1) is restricted parallel to the pressure direction towards plate 210. The sections 232 for restricting movement in the pressure direction are provided in pairs and are oriented horizontally orthogonal to direction A. That is, the sections 232 for restricting movement in the pressure direction are provided in pairs such that the squeegee 220 is located between them. Furthermore, the sections 232 for restricting movement in the pressure direction are provided separately from the sections 231 for restricting movement in the feed direction. In a state where the restriction by the sections 232 for restricting movement in the pressure direction is lifted, the doctor blade 220 is removed by moving in direction B (direction B1). Additionally, the sections 232 for restricting movement in the pressure direction are designed such that they move parallel to the doctor blade 220 in direction A (horizontal direction) and restrict the movement of the doctor blade 220 in direction B1 (upward direction). At the front end of the sections for restricting movement in the pressure direction 232, which engage with the pressure sections 225, an inclined section 232a is formed, the size of which changes in direction B and in direction A. The doctor blade locking sections 232 are designed such that they lift onto the pressure sections 225 and lock the doctor blade 20 (restricting its movement in direction B). That is, when the sections for restricting movement in the pressure direction 232 lock the doctor blade 220 (restricting its movement in direction B) as shown in Fig. 11, the retaining sections 230b (application section 24) project from the base 230a. The springs 233 are designed such that they are connected to the sections 232 for restriction in the pressure direction and generate a pressure force for the doctor blade 220 towards the plate 210. More precisely, the springs 233 are designed such that they pre-tension the retaining sections 230b, which abut the sections 232 for restriction in the pressure direction, in the pressure direction (direction B2). In the second embodiment, the system sections 234 are configured such that they abut the base 230a. Furthermore, the system sections 234 are provided on the lower section of the retaining sections 230b (on the side facing B2). The system sections 234 are also configured to switch the incidence of light (visible light or infrared light) from the illumination section 241a at the light-receiving section 241b. More precisely, the system sections 234 are configured to either allow or block the light (visible light or infrared light) from the illumination section 241a to the light-receiving section 241b.The system sections 234 are thus designed in such a way that, depending on the restriction state in which the movement of the squeegee 220 is restricted by the sections 232 in the direction of pressure, and the release state in which the restriction of the movement of the squeegee 220 by the sections 232 in the direction of pressure is lifted, they switch the arrival of light from the illumination section 241a at the light receiving section 241b. More precisely, the design is such that when switching between the restriction state and the release state of sections 232, plant sections 234 move in the direction of pressure to restrict the arrival of light from the illumination section 241a at the light receiving section 241b. When, as shown in Fig. 11, the doctor blade 220 is locked in the pressure direction by the sections 232 (its movement in direction B is restricted), the light from the illumination section 241a is detected at the light-receiving section 241b. That is, as the holding sections 230b (connection sections 234) project from the base 230a, the light from the illumination section 241a passes through the gap between the connection sections 234 and the base 230a and arrives at the light-receiving section 241b. This detects that the doctor blade 220 is locked by the doctor blade holding sections 230. If, on the other hand, as shown in Fig. 12, the squeegee 220 is not locked by the sections for restriction in the pressure direction 232 (the restriction of its movement in direction B is lifted), the light from the illumination section 241a is not detected at the light receiving section 241b.This means that, by having the holding sections 230b (system sections 234) at the base 230a, the light from the lighting section 241a is blocked by the system sections 234 and does not reach the light receiving section 241b. In the second embodiment, the squeegee detection section 241 is configured to detect whether the squeegee 220 is installed or not. More precisely, the squeegee detection section 241 is configured to detect whether the squeegee 220 is installed and whether the movement of the squeegee 220 is restricted (locked) by the sections 232 to limit its movement in the pressure direction. The squeegee detection section 242 is designed to detect whether the squeegee 220 is installed or not. More precisely, if the squeegee 220 is not installed, as shown in Fig. 9, no light from the illumination section 242a is detected at the light-receiving section 242b. That is, the light from the illumination section 242a is blocked by the squeegee 220 and does not reach the light-receiving section 242b. Conversely, if the squeegee 220 is not installed, the light from the illumination section 242a is detected at the light-receiving section 242b. The light from the illumination section 242a therefore reaches the light-receiving section 242b without being blocked. If the doctor blade detection section 242 does not detect that the doctor blade 220 is installed, or if, according to the detection result at the light reception section 242b, no light from the illumination section 242a is detected at the light reception section 242b, it is possible that the doctor blade 3 will not move, even if, in the automatic operation of the component placement device 100, its movement in direction A is provided for by the movement of the plate 210. Conversely, if a detection condition as described above occurs while the automatic operation of the component placement device 100 is stopped, the automatic operation cannot be resumed even by pressing a switch to start the automatic operation of the component placement device 100. If the detection condition described above occurs, a warning indicator for an error condition may also appear on a monitor (not shown). The design of the second embodiment otherwise corresponds to that of the first embodiment. Effect of the second embodiment The second embodiment can achieve the following effects. In the second embodiment, as in the first embodiment, the doctor blade detection sections 241 and 242 are provided to detect whether the doctor blade 220 is installed or not, thus preventing accidental failure to install the doctor blade 220. This prevents flux from leaking into the device when flux is supplied while the doctor blade 220 is not installed. The effects of the second embodiment are otherwise the same as those of the first embodiment. Variation example The disclosed embodiments are to be understood as exemplary in every respect and not as limiting. The scope of the present invention is not set out in the preceding description of the embodiments, but rather in the patent claims, and also includes all equivalents and modifications within the claims (examples of modification). For example, the present invention, in its first and second embodiments, was described using the example of the application of the device for applying viscous fluid to a device for applying flux, but the present invention is not limited thereto. The device for applying viscous fluid of the present invention can also be applied to a device for applying viscous fluids other than flux. For example, the device for applying viscous fluid of the present invention can also be applied to a device for applying viscous fluids such as solder, silver paste, and the like. Furthermore, the description in the first and second embodiments was based on the example of flip-chip assembly of a bare chip with bumps, but the present invention is not limited to this. For example, the present invention can also be applied to a package-on-package (PoP) assembly of a packaged component with a ball grid array (BGA). The component placement device of the present invention can also be applied to a flip-chip bonding device, as well as to a component placement device in which components are mounted that are fed from a belt feeder or a tray. The description in the first embodiment also used the example of a pneumatic cylinder as the force-generating mechanism, but the present invention is not limited to this. In the present invention, a hydraulic cylinder, a solenoid, a linear motor, or the like can also be used as the force-generating mechanism, for example. The description in the first embodiment also used the example of a regulator as a pressure force adjustment mechanism, but the present invention is not limited to this. In the present invention, a manual valve, an electromagnetic valve, a variable pressure mechanism, a current control section, a servo controller, or the like can also be used as a pressure force adjustment mechanism. Furthermore, the description in the first and second embodiments was based on an example of a configuration in which flux (viscous fluid) is supplied above a doctor blade, but the present invention is not limited to this. In the present invention, viscous fluid can also be supplied to a plate below the doctor blade via a dispensing section. Furthermore, the description in the first and second embodiments was based on an example in which the squeegee detection section detects light from an illumination section by means of a light-receiving section in order to detect the presence of the squeegee and the restriction state; however, the present invention is not limited to this. The squeegee detection section of the present invention can also detect the presence of the squeegee and the restriction state by means other than light. For example, the squeegee detection section can detect the presence of the squeegee and the restriction state using sound (ultrasound) or radio waves. The squeegee detection section can also detect the presence of the squeegee and the restriction state by means of a mechanical switch. A transmit-type sensor or a reflect-type sensor can be used as the squeegee detection section. The first embodiment was described using the example of two locking pins as a switching section, but the present invention is not limited to this. In the present invention, one, three, or more locking pins can also be provided. Furthermore, the light from the illumination section can be blocked by elements other than locking pins. Explanation of reference symbols 1, 200 Viscous flux feed device (fluid feed device, viscous fluid feed section) 2, 210 Plate 3, 220 Doctor blade 4 Rack section 5, 230 Doctor blade holding section 6 Flux output section (supply section) 7 Sensor 8, 241, 242 Doctor blade detection section 8a, 241a, 242a Illumination section 8b, 241b, 242b Light reception section 10 Rack 11 Control section 13 Chip component feed sections 13a Belt feed device 14 Placement section 14a Suction nozzles 15 Wafer holding table 16 Removal section 16a Wafer head 17 Component recognition camera 18 Fixed camera 19 Wafer receiving section 21, 211 Depression section 22 Conveyor belt 24 System section 31, 221 Squeegee section 32 Wall section 33, 223 Plate-shaped section 34 Pin for restricting movement in sliding direction 35 Pressure section 41 Motor 42 Belt 43 Plate positioning section 51, 231 Section for restricting movement in feed direction 52,232 Section for restriction in pressure direction (restriction section) 53 Coupling section 54 Rotary bearing section 55 Piston section 56 Pneumatic cylinder (pressure force generation mechanism) 100 Component placement device 221a Dam section 222 Coupling section 224 Pin for restriction in sliding direction 225 Pressure section 230a Base 230b Retaining section 233 Spring 234 Placement section (switching section) 521 Doctor blade locking section 522 Rotary bearing recess section 523, 524 Piston engagement hole 525 Locking pin (switching section) 561 Pneumatic generation section 562 Regulator A Horizontal direction A1, A2 Sliding direction (feed direction) B Vertical direction B1 Upward direction B2 Pressure direction C Naked chip (component) S Substrate W Wafer,

Claims

Feeding device (1, 200) for a viscous fluid, comprising a plate (2, 210) on which a viscous fluid can be spread, a doctor blade (3, 220) which can be arranged to slide over the plate (2, 210) in order to smooth the viscous fluid thereon, a doctor blade holding section (5, 230) on which the doctor blade (3, 220) can be installed, and a doctor blade detection section (8, 241, 242), wherein the doctor blade holding section (5, 230) has a restriction section (52, 232) by means of which a movement of the doctor blade (3, 220) in a direction (B1) parallel to a pressure direction (B2) against the plate (2, 210) can be restricted, wherein it can be detected by means of the doctor blade detection section (8, 241) whether the doctor blade (3, 220) is installed and whether the movement of the squeegee (3, 220) is restricted by the constraint section (52, 232). Feeding device (1, 200) for viscous fluid according to claim 1, wherein the doctor blade detection section (8, 241) comprises an illumination section (8a, 241a) and a light reception section (8b, 241b), wherein the doctor blade holding section (5, 230) comprises a switching section (525, 243) by means of which the arrival of light from the illumination section (8a, 241a) at the light reception section (8b, 241b) can be switched, wherein by means of the switching section (525, 243) depending on a restriction state in which the movement of the doctor blade (3, 220) is restricted by the restriction section (52, 232) and a release state in which the restriction of the movement of the doctor blade (3, 220) by the restriction section (52, 232) is lifted, the arrival of light from the illumination section (8a, 241a) is switchable at the light reception section (8b, 241b). Feeding device (1, 200) for viscous fluid according to claim 2, wherein, by means of the switching section (525, 243), when switching the restriction section (52, 232) between the restriction state and the release state by means of a movement, the arrival of light from the illumination section (8a, 241a) at the light receiving section (8b, 241b) can be switched. Feeding device (1) for viscous fluid according to claim 3, wherein the squeegee holding section (5) has a rotary bearing section (54) by means of which the restriction section (52) can be rotatably mounted, wherein the switching section (525) is movable such that the restriction section (52) approaches the rotary bearing section (54) in the release state and the restriction section (52) moves away from the rotary bearing section (54) in the restriction state. Feeding device (1) for viscous fluid according to one of claims 1 to 4, further comprising a pressure force generation mechanism (56) which is arranged in a manner approaching the restriction section (52) and by means of which a pressure force of the doctor blade (3) against the plate (2) can be generated, wherein pressure force can be generated by means of the pressure force generation mechanism (56) when it is detected by means of the doctor blade detection section (8) that the movement of the doctor blade (3) is restricted by the restriction section (52). Feeding device (1, 200) for viscous fluid according to one of claims 1 to 5, further comprising a supply section (6) by means of which viscous fluid can be supplied to the plate (2, 210), wherein no viscous fluid can be supplied by means of the supply section (6) if it is not detected by means of the doctor blade detection section (8, 241, 242) that the doctor blade (3, 220) is installed. Component placement device (100) comprising a placement section (14) by means of which a substrate (S) can be placed with a component, and a feed section (6) for viscous fluid by means of which viscous fluid can be supplied to the component, wherein the feed section (6) for viscous fluid comprises a plate (2, 210) on which a viscous fluid can be spread, a doctor blade (3, 220) which can be arranged to slide over the plate (2, 210) in order to smooth the viscous fluid thereon, a doctor blade holding section (5, 230) on which the doctor blade (3, 220) can be installed, and a doctor blade gripping section (8, 241, 242), wherein the doctor blade holding section (5, 230) has a restraint section (52, 232) by means of which movement of the doctor blade (3, 220) in a direction (B1) parallel to a pressure direction (B2) on the plate (2, 210) can be restricted, whereby it can be detected by means of the squeegee detection section (8, 241) whether the squeegee (3,220) is installed and whether the movement of the squeegee (3, 220) is restricted by the constraint section (52, 232).

Images