Bending unit

Abstract

This bending unit includes a pair of bending claws for bending a pair of leads of a lead component inserted into a pair of through holes of a substrate, and comprises a bending head to which the pair of bending claws are detachably attached. The pair of bending claws are replaced according to the diameter of the lead to be bent.

Description

Bending Unit

[0001] The present invention relates to a bending unit that bends a pair of leads of a lead component inserted into a pair of through-holes of a substrate.

[0002] The following patent document describes a technique for bending a pair of leads of a lead component inserted into a pair of through-holes of a substrate.

[0003] Japanese Patent Application Laid-Open No. 2020-013922

[0004] This specification aims to appropriately bend a pair of leads of a lead component inserted into a pair of through-holes of a substrate.

[0005] In order to solve the above problems, this specification discloses a bending unit having a pair of bending claws for bending a pair of leads of a lead component inserted into a through-hole of a substrate, and a bending head to which the pair of bending claws are detachably attached, wherein the pair of bending claws are exchanged according to the wire diameter of the lead to be bent.

[0006] In the present disclosure, a pair of bending claws are exchanged according to the wire diameter of the lead to be bent. Thereby, a pair of leads of a lead component inserted into a pair of through-holes of a substrate can be appropriately bent.

[0007] This is a perspective view of a component mounting machine. This is a perspective view of the component mounting device of the component mounting machine. This is a perspective view of the transport device and clinching device. This is a perspective view of the clinching device. This is a perspective view of the clinching unit. This is a perspective view of the bent body. This is a block diagram of the control device. This is a schematic diagram of a lead component with a lead inserted into a through-hole in a circuit board. This is a schematic diagram of a lead that has been inserted into a through-hole in a circuit board and bent. This is a schematic diagram of a lead component with a lead inserted into a through-hole in a circuit board. This is a schematic diagram of a lead that has been inserted into a through-hole in a circuit board and bent. This is a schematic diagram of a lead component with a lead inserted into a through-hole in a circuit board. This is a schematic diagram of a lead that has been inserted into a through-hole in a circuit board and bent. This is a schematic diagram of a lead component with a lead inserted into a through-hole in a circuit board. This is a schematic diagram of a lead that has been inserted into a through-hole in a circuit board and bent. This is a schematic diagram of the through-hole in a circuit board and the bent rod of the clinching unit. This is a schematic diagram of a lead that has been inserted into a through-hole in a circuit board and bent. This is a schematic diagram of the through-hole in a circuit board and the bent rod of the clinching unit. This is a schematic diagram of a lead that has been inserted into a through-hole in a circuit board and bent. This is a side view of the first bent body and the second bent body. This is an operation diagram of the bent body when bending a lead with a thin wire diameter. This is an operation diagram of the bent body when bending a lead with a thin wire diameter. This is an operation diagram of the bent body when bending a lead with a thick wire diameter. This is an operation diagram of the bent body when bending a lead with a thick wire diameter. This is a perspective view of a clinching device. This is a perspective view of a cut-and-clinch unit. This is a cross-sectional view of a cut-and-clinch unit. This is a perspective view showing the fixed and movable bodies that constitute the slide body. This is an operation diagram of the slide body when bending and cutting a lead. This is an operation diagram of the slide body when bending and cutting a lead. This is a side view of the first movable and fixed replaceable body and the second movable and fixed replaceable body. This is an operation diagram of the slide body when bending and cutting a lead. This is an operation diagram of the slide body when bending and cutting a lead. This is an operation diagram of the slide body when bending and cutting a lead. This is an operation diagram of the slide body when bending and cutting a lead. This is a diagram illustrating the operation of the sliding mechanism when bending and cutting the lead.This is a diagram illustrating the operation of the sliding mechanism when bending and cutting the lead. This is a diagram illustrating the operation of the sliding mechanism when bending and cutting the lead. This is a diagram illustrating the operation of the sliding mechanism when bending and cutting the lead. This is a diagram illustrating the operation of the sliding mechanism when bending and cutting the lead.

[0008] Hereinafter, embodiments of the present invention will be described in detail with reference to the figures, as embodiments for carrying out the present invention.

[0009] Figure 1 shows a component mounting machine 10 of the first embodiment. The component mounting machine 10 is a device for performing the work of mounting components onto a circuit board 12. The component mounting machine 10 comprises a main unit 20, a substrate transport and holding device 22, a component mounting device 24, a mark camera 26, a parts camera 28, a component supply device 30, a loose component supply device 32, a clinching device (see Figure 3) 34, and a control device (see Figure 7) 36. The circuit board 12 can be a circuit board or a three-dimensional structured substrate, and the circuit board can be a printed wiring board or a printed circuit board.

[0010] The main body of the device 20 is composed of a frame 40 and a beam 42 suspended on the frame 40. The substrate transport and holding device 22 is located in the center of the frame 40 in the front-rear direction and has a transport device 50 and a clamping device 52. The transport device 50 is a device for transporting the circuit substrate 12, and the clamping device 52 is a device for holding the circuit substrate 12. As a result, the substrate transport and holding device 22 transports the circuit substrate 12 and also holds the circuit substrate 12 fixedly in a predetermined position. The direction in which the substrate transport and holding device 22 transports the circuit substrate 12 is the horizontal direction. In the following description, the direction in which the substrate transport and holding device 22 transports the circuit substrate 12 will be referred to as the X direction, the horizontal direction perpendicular to that direction will be referred to as the Y direction, and the vertical direction will be referred to as the Z direction. In other words, the width direction of the component mounting machine 10 is the X direction, and the front-rear direction is the Y direction.

[0011] The component mounting device 24 is mounted on the beam 42 and has two work heads 60 and 62 and a work head moving device 64. As shown in Figure 2, a suction nozzle 66 is provided on the lower end surface of each work head 60 and 62, and this suction nozzle 66 holds the component by suction. The work head moving device 64 also has an X-direction moving device 68, a Y-direction moving device 70, and a Z-direction moving device 72. The two work heads 60 and 62 are moved integrally to any position on the frame 40 by the X-direction moving device 68 and the Y-direction moving device 70. In addition, each work head 60 and 62 is detachably mounted on sliders 74 and 76, and the Z-direction moving device 72 moves the sliders 74 and 76 individually in the vertical direction. In other words, the work heads 60 and 62 are moved individually in the vertical direction by the Z-direction moving device 72.

[0012] Furthermore, the mark camera 26 is mounted on the slider 74 with its orientation facing downwards and moves in the X, Y, and Z directions together with the work head 60. This allows the mark camera 26 to capture images of any position on the frame 40. As shown in Figure 1, the parts camera 28 is positioned with its orientation facing upwards between the substrate transport and holding device 22 and the parts supply device 30 on the frame 40. This allows the parts camera 28 to capture images of the parts held by the suction nozzles 66 of the work heads 60 and 62.

[0013] The parts supply device 30 is located at one end of the frame 40 in the front-rear direction. The parts supply device 30 includes a tray-type parts supply device 97 and a feeder-type parts supply device (see Figure 7) 98. The tray-type parts supply device 97 is a device that supplies parts in a state where they are placed on a tray. The feeder-type parts supply device 98 is a device that supplies parts by tape feeder (not shown) or stick feeder (not shown).

[0014] The loose parts supply device 32 is located at the other end of the frame 40 in the front-rear direction. The loose parts supply device 32 is a device that aligns multiple parts that are scattered loosely and supplies the parts in an aligned state. In other words, it is a device that aligns multiple parts in any orientation to a predetermined orientation and supplies the parts in that predetermined orientation. The parts supplied by the parts supply device 30 and the loose parts supply device 32 include electronic circuit components, solar cell components, and power module components. Furthermore, electronic circuit components include parts with leads and parts without leads.

[0015] As shown in Figure 3, the clinching device 34 is positioned between a pair of transport lanes 99 (only one of the pair of transport lanes is shown in Figure 3) provided by the transport device 50. As shown in Figure 4, the clinching device 34 has a clinching unit 100 and a unit moving device 102. The clinching unit 100 is a device that bends the lead (see Figure 8) 108 of a lead component (see Figure 8) 106 inserted into a through hole (see Figure 8) 104 formed in the circuit board material 12. As shown in Figure 5, the clinching unit 100 includes a unit body 110 and a pair of slide bodies 112. A slide rail 116 is positioned to extend linearly from the upper end of the unit body 110, and the pair of slide bodies 112 are slidably supported by the slide rail 116. This allows the pair of slide bodies 112 to move linearly closer together and further apart. Furthermore, the distance between the pair of slide bodies 112 is controlled by the drive of an electromagnetic motor (see Figure 7) 118.

[0016] Furthermore, a pair of bent bodies 120 are fixed to the upper surfaces of a pair of slide bodies 112. Each of the pair of bent bodies 120 consists of a main body 122, a bending rod 124, and a support pin 126, as shown in Figure 6. The main body 122 is generally rectangular in shape and is fixed to the upper surface of the slide body 112. The bending rod 124 is generally rod-shaped, and a pair of bending rods 124 are erected on the upper surfaces of the pair of main bodies 122 so as to face each other. Notch holes 130 are formed at the upper ends of the bending rods 124. The notch holes 130 open to the upper end surface and two consecutive sides of the bending rod 124. The notch holes 130 of the pair of bending rods 124 are formed so as to face opposite directions. A strain gauge 132 is also positioned near the center of the bending rod 124 in the vertical direction. The strain gauge 132 is generally in the form of a thin film and is attached to the side of the bending rod 124. The strain gauge 132 has a metal thin film resistor (not shown), and by detecting the change in electrical resistance due to the deformation of the resistor, the amount of strain, i.e., the displacement, of the resistor is calculated. In this way, the strain gauge 132 detects the strain, deformation, etc. of the bending rod 124. The support pin 126 is erected on the upper surface of the main body 122 next to the bending rod 124. The length of the support pin 126 is several millimeters longer than the length of the bending rod 124. Therefore, the upper end of the support pin 126 extends slightly above the upper end of the bending rod 124.

[0017] Furthermore, as shown in Figure 4, the unit moving device 102 includes an X-direction moving device 150, a Y-direction moving device 152, a Z-direction moving device 154, and a rotation device 156. The X-direction moving device 150 includes a slide rail 160 and an X-slider 162. The slide rail 160 is arranged to extend in the X direction, and the X-slider 162 is slidably held on the slide rail 160. The X-slider 162 moves in the X direction by the drive of an electromagnetic motor (see Figure 7) 164. The Y-direction moving device 152 includes a slide rail 166 and a Y-slider 168. The slide rail 166 is arranged on the X-slider 162 to extend in the Y direction, and the Y-slider 168 is slidably held on the slide rail 166. The Y-slider 168 moves in the Y direction by the drive of an electromagnetic motor (see Figure 7) 170. The Z-direction moving device 154 includes a slide rail 172 and a Z-slider 174. The slide rail 172 is mounted on the Y-slider 168 so as to extend in the Z direction, and the Z-slider 174 is slidably held on the slide rail 172. The Z-slider 174 moves in the Z direction by the drive of an electromagnetic motor (see Figure 7) 176.

[0018] Furthermore, the rotation device 156 generally has a disc-shaped rotary table 178. The rotary table 178 is supported by a Z-slider 174 so as to be rotatable about its vertical axis and rotates by the drive of an electromagnetic motor (see Figure 7) 180. The clinch unit 100 is disposed on the rotary table 178. With this structure, the clinch unit 100 can be moved to any position and positioned at a predetermined position by the X-direction moving device 150, the Y-direction moving device 152, and the Z-direction moving device 154, and can also be rotated at any angle and positioned at a predetermined angle by the rotation device 156. This makes it possible to position the clinch unit 100 at any position and angle below the circuit board 12 held by the clamping device 52.

[0019] As shown in Figure 7, the control device 36 comprises a controller 190, a plurality of drive circuits 192, and an image processing device 196. The plurality of drive circuits 192 are connected to the transport device 50, clamp device 52, work heads 60, 62, work head moving device 64, tray-type parts supply device 97, feeder-type parts supply device 98, loose parts supply device 32, and electromagnetic motors 118, 164, 170, 176, 180. The controller 190 is a computer-based system equipped with a CPU, ROM, RAM, etc., and is connected to the plurality of drive circuits 192. As a result, the operation of the substrate transport and holding device 22, the parts mounting device 24, etc., is controlled by the controller 190. The controller 190 is also connected to the image processing device 196. The image processing device 196 processes image data obtained by the mark camera 26 and the parts camera 28, and the controller 190 acquires various information from this image data. Furthermore, the controller 190 is also connected to the strain gauge 132. As described above, the strain gauge 132 detects the amount of displacement based on the electrical resistance associated with the deformation of the resistor. Therefore, the strain gauge 132 outputs the detected amount of displacement to the controller 190, and the controller 190 detects the strain, deformation, etc. of the bending rod 124 based on the acquired amount of displacement. The controller 190 stores a control program 198, and the component mounting machine 10 performs the operation of mounting components onto the circuit board 12 by processing the control program 198. The component mounting machine 10 can mount various components onto the circuit board 12, but the case of mounting leaded components 106 onto the circuit board 12 will be described below.

[0020] Specifically, the transport device 50 of the substrate transport and holding device 22 transports the circuit board 12 to the work position, where the clamp device 52 holds the circuit board 12 in place. Next, the mark camera 26 moves above the circuit board 12 and takes an image of it. This allows the controller 190 to acquire information regarding the holding position of the circuit board 12. In addition, the component supply device 30 or the loose component supply device 32 supplies lead components 106 at a predetermined supply position. Then, either the work head 60 or 62 moves above the component supply position, and the suction nozzle 66 holds the component body 107 of the lead component 106 by suction.

[0021] Next, the work heads 60 and 62, holding the lead component 106, move above the parts camera 28, and the parts camera 28 images the lead component 106 held by the suction nozzle 66. This allows the controller 190 to acquire information regarding the holding position of the component, etc. Subsequently, the work heads 60 and 62, holding the lead component 106, move above the circuit board 12, correcting errors in the holding position of the circuit board 12, errors in the holding position of the component, etc. Then, the work heads 60 and 62 insert the leads 108 of the lead component 106 into the through holes 104 formed in the circuit board 12. At this time, the clinch unit 100 moves below the circuit board 12.

[0022] Specifically, the clinch unit 100 moves and positions a pair of slide bodies 112 by driving an electromagnetic motor 118 so that the distance between the notched holes 130 of a pair of bending rods 124 is the same as the distance between the two through holes 104 formed in the circuit board 12. Furthermore, the clinch unit 100 is rotated and positioned by operating a rotation device 156 so that the direction in which the two through holes 104 of the circuit board 12 are aligned matches the direction in which the notched holes 130 of the pair of bending rods 124 are aligned. For example, the two through holes 104 of the circuit board 12 are aligned along the X direction.

[0023] Then, the X-direction moving device 150 and the Y-direction moving device 152 operate to move the clinch unit 100, positioning it so that the position of the notch hole 130 of the bending rod 124 coincides with the position of the through hole 104 of the circuit board 12 in the XY coordinate system. As a result, the clinch unit 100 moves along the XY direction, positioning the notch holes 130 of the pair of bending rods 124 and the two through holes 104 of the circuit board 12 to overlap in the vertical direction.

[0024] Next, the clinch unit 100 is raised and positioned by the operation of the Z-direction movement device 154 so that the upper end of the support pin 126 contacts the lower surface of the circuit board 12, or is positioned slightly below and close to the lower surface of the circuit board 12. In this way, by controlling the operation of the X-direction movement device 150, the Y-direction movement device 152, the Z-direction movement device 154, and the rotation device 156, the clinch unit 100 is positioned below the circuit board 12 with the notched holes 130 of the pair of bending rods 124 and the two through holes 104 of the circuit board 12 overlapping in the vertical direction.

[0025] Next, the work heads 60 and 62 descend due to the operation of the Z-direction moving device 72, so that the lead 108 of the lead component 106 is inserted into the through hole 104 of the circuit board 12, and the work heads 60 and 62 then stop. At this time, the work heads 60 and 62 insert the lead 108 of the lead component 106 into the through hole 104 all the way to the base, so that the bottom surface of the component body 107 comes into contact with the top surface of the circuit board 12. When the work heads 60 and 62 insert the lead 108 of the lead component 106 into the through hole 104 all the way to the base, the circuit board 12 is pressed downwards, but the support pins 126 support the bottom surface of the circuit board 12.

[0026] As described above, when the work heads 60 and 62 insert the leads 108 of the lead component 106 into the through holes 104 of the circuit board 12, the lower ends of the leads 108 are inserted into the notches 130 of the bending rods 124, as shown in Figure 8. Note that in Figure 8, the support pins 126 that support the lower surface of the circuit board 12 are omitted. Then, the pair of slide bodies 112 slide in a direction away from each other due to the drive of the electromagnetic motor 118, that is, the motor force. At this time, the pair of bending rods 124 also slide in a direction away from each other along with the pair of slide bodies 112, so that the pair of leads 108 come into contact with the inner wall surfaces that define the pair of notches 130 and bend in a direction away from each other. As a result, as shown in Figure 9, the pair of leads 108 bend outward in different directions, preventing them from coming out of the through holes 104 of the circuit board 12, and the lead component 106 is attached to the circuit board 12. As described above, a strain gauge 132 is provided on the bending rod 124, and the strain, deformation, etc. of the bending rod 124 can be detected based on the detected value of the strain gauge 132. Therefore, the controller 190 determines whether or not the bending rod 124 has bent the lead 94 based on the detected value of the strain gauge 132.

[0027] Furthermore, the clinch unit 100 can not only attach the lead component 106 to the circuit board 12 with a pair of leads 108 bent in a direction that separates them from each other, but can also attach the lead component 106 to the circuit board 12 with a pair of leads 108 bent in a direction that brings them closer together. Specifically, when the clinch unit 100 moves below the through hole 104 of the circuit board 12, it is positioned by moving a pair of slide bodies 112 driven by an electromagnetic motor 118 so that the distance between the pair of bending rods 124 is longer than the distance between the two through holes 104 of the circuit board 12. In addition, by operating the X-direction moving device 150 and the Y-direction moving device 152 to move the clinch unit 100, the position of the pair of bending rods 124 is positioned in the XY coordinate system so as to straddle the positions of the two through holes 104 of the circuit board 12. Furthermore, the clinch unit 100 is raised and positioned by the operation of the Z-direction moving device 154 so that the upper end of the support pin 126 contacts the lower surface of the circuit board 12, or is positioned slightly below and close to the lower surface of the circuit board 12.

[0028] Next, the work heads 60 and 62 descend due to the operation of the Z-direction moving device 72, inserting the leads 108 of the lead component 106 held by the suction nozzle 66 into the through-hole 104 of the circuit board 12, and then stopping. As a result, as shown in Figure 10, the work heads 60 and 62 insert the lower ends of the pair of leads 108 between the pair of bending rods 124. Then, the pair of sliding bodies 112 of the clinch unit 100 slide toward each other due to the drive of the electromagnetic motor 118, that is, the motor force. At this time, the pair of bending rods 124 also slide toward each other along with the pair of sliding bodies 112 of the clinch unit 100, so that the clinch unit 100 bends the pair of leads 108 toward each other by bringing them into contact with the outer wall surfaces of the pair of bending rods 124. As a result, as shown in Figure 11, the pair of leads 108 bend inward in different directions from each other, preventing them from coming out of the through-hole 104 in the circuit board 12, and the lead component 106 is attached to the circuit board 12.

[0029] Furthermore, the clinch unit 100 can not only attach the lead component 106 to the circuit board 12 by bending a pair of leads 108 in different directions, but can also attach the lead component 106 to the circuit board 12 by bending a pair of leads 108 in the same direction. Specifically, when the controller 190 moves the clinch unit 100 below the through hole 104 of the circuit board 12, it moves a pair of sliding bodies 112 by driving an electromagnetic motor 118 so that the distance between the pair of bending rods 124 is longer than the distance between the two through holes 104 of the circuit board 12 to position the unit. Next, the controller 190 operates the X-direction moving device 150 and the Y-direction moving device 152 to move the clinch unit 100, so that, as shown in Figure 12, the position of the notch hole 130a of one of the pair of bending rods 124a coincides with the position of one of the two through holes 104a of the circuit board material 12 in the XY coordinate system, and the position of the other bending rod 124b of the pair of bending rods 124 is positioned outside the position of the other through hole 104b of the circuit board material 12. The controller 190 also operates the Z-direction moving device 154 to move the clinch unit 100 so that the upper end of the support pin 126 is in contact with the lower surface of the circuit board material 12, or positioned slightly below and close to the lower surface of the circuit board material 12.

[0030] Next, the controller 190 activates the Z-direction movement device 72 to lower the work heads 60 and 62, causing the work heads 60 and 62 to insert the lead 108 of the lead component 106 held by the suction nozzle 66 into the through hole 104 of the circuit board 12, and then stop descending. As a result, the lower end of the lead 108a is inserted into the notch hole 130a of the bending rod 124a and faces the outer wall surface of the bending rod 124b where the notch hole 130b is not formed. Then, the controller 190 activates the X-direction movement device 150 to move the clinch unit 100 in the direction of X1. At this time, the lead 108a comes into contact with the inner wall surface that defines the notch hole 130a of the bending rod 124a, and the lead 108b comes into contact with the outer wall surface of the bending rod 124b, causing the pair of leads 108 to bend. As a result, as shown in Figure 13, the pair of leads 108 bend in the same direction (the direction of X1), preventing them from coming out of the through-hole 104 in the circuit board 12, and the lead component 106 is attached to the circuit board 12.

[0031] Furthermore, the clinch unit 100 can also attach the lead component 106 to the circuit board 12 with a pair of leads 108 bent in directions opposite to the direction of X1. Specifically, when the controller 190 moves the clinch unit 100 below the through hole 104 of the circuit board 12, it moves a pair of slide bodies 112 driven by an electromagnetic motor 118 to position the clinch unit 100 so that the distance between the pair of bending rods 124 of the clinch unit 100 is longer than the distance between the two through holes 104 of the circuit board 12. Furthermore, the controller 190 operates the X-direction moving device 150 and the Y-direction moving device 152 to move the clinch unit 100, so that, as shown in Figure 14, the position of the notch hole 130b of one of the pair of bending rods 124, the bending rod 124b, coincides with the position of one of the two through holes 104, the through hole 104b, of the circuit board material 12, and the position of the other bending rod 124a of the pair of bending rods 124 is positioned outside the position of the other through hole 104a of the circuit board material 12. In addition, the controller 190 operates the Z-direction moving device 154 to raise the clinch unit 100, so that the upper end of the support pin 126 contacts the lower surface of the circuit board material 12, or is positioned slightly below and close to the lower surface of the circuit board material 12.

[0032] Next, the controller 190 activates the Z-direction movement device 72 to lower the work heads 60 and 62, causing the work heads 60 and 62 to insert the lead 108 of the lead component 106 held by the suction nozzle 66 into the through hole 104 of the circuit board 12, and then stop descending after insertion. As a result, the lower end of the lead 108b is inserted into the notch hole 130b of the bending rod 124b and faces the outer wall surface of the bending rod 124a where the notch hole 130a is not formed. Then, the controller 190 activates the X-direction movement device 150 to move the clinch unit 100 in the direction of X2, opposite to the direction of X1. At this time, the lead 108b comes into contact with the inner wall surface that defines the notch hole 130b of the bending rod 124b, and the lead 108a comes into contact with the outer wall surface of the bending rod 124a, causing the pair of leads 108 to bend. As a result, as shown in Figure 15, the pair of leads 108 bend in the same direction (direction X2), preventing them from coming out of the through-hole 104 in the circuit board 12, and the lead component 106 is attached to the circuit board 12.

[0033] Furthermore, the clinch unit 100 can also attach the lead component 106 to the circuit board 12 with a pair of leads 108 bent in the same direction in the Y direction. Specifically, when the controller 190 moves the clinch unit 100 below the through hole 104 of the circuit board 12, it moves a pair of slide bodies 112 driven by an electromagnetic motor 118 to position the clinch unit 100 so that the distance between the pair of bending rods 124 of the clinch unit 100 is the same as the distance between the two through holes 104 of the circuit board 12. The controller 190 also moves the clinch unit 100 by operating the X-direction moving device 150 and the Y-direction moving device 152 so that, in the XY coordinate system, the position of the notch holes 130 of the pair of bending rods 124 coincides with the positions of the two through holes 104 of the circuit board 12, as shown in Figure 16. Furthermore, the controller 190 operates the Z-direction movement device 154 to raise the clinch unit 100, positioning the clinch unit 100 such that the upper end of the support pin 126 of the clinch unit 100 contacts the lower surface of the circuit board 12, or is located slightly below and close to the lower surface of the circuit board 12.

[0034] Next, the controller 190 activates the Z-direction movement device 72 to lower the work heads 60 and 62, causing the work heads 60 and 62 to insert the leads 108 of the lead component 106 held by the suction nozzle 66 into the through holes 104 of the circuit board 12, and then stop descending after insertion. As a result, the lower ends of the pair of leads 108 are inserted into the notched holes 130 of the pair of bending rods 124. Then, the controller 190 activates the Y-direction movement device 152 to move the clinch unit 100 in the Y1 direction. At this time, the pair of leads 108 come into contact with the inner wall surface that defines the notched holes 130 of the pair of bending rods 124, causing the pair of leads 108 to bend. As a result, as shown in Figure 17, the pair of leads 108 bend in the same direction (direction Y1), preventing them from coming out of the through-hole 104 in the circuit board 12, and the lead component 106 is attached to the circuit board 12.

[0035] Furthermore, the clinch unit 100 can also attach the lead component 106 to the circuit board 12 with a pair of leads 108 bent in directions opposite to the Y1 direction. Specifically, when the controller 190 moves the clinch unit 100 below the through hole 104 of the circuit board 12, it moves a pair of slide bodies 112 driven by an electromagnetic motor 118 to position the clinch unit 100 so that the distance between the pair of bending rods 124 of the clinch unit 100 is the same as the distance between the two through holes 104 of the circuit board 12. The controller 190 also moves the clinch unit 100 by operating the X-direction moving device 150 and the Y-direction moving device 152 so that, in the XY coordinate system, as shown in Figure 18, the positions of the two through holes 104 of the circuit board 12 and the outer wall surface of the pair of bending rods 124 where the notched holes 130 are not formed face each other in the Y direction. Furthermore, the controller 190 operates the Z-direction movement device 154 to raise the clinch unit 100, positioning the clinch unit 100 such that the upper end of the support pin 126 of the clinch unit 100 contacts the lower surface of the circuit board 12, or is located slightly below and close to the lower surface of the circuit board 12.

[0036] Next, the controller 190 activates the Z-direction movement device 72 to lower the work heads 60 and 62, inserting the leads 108 of the lead component 106 held by the suction nozzle 66 into the through-holes 104 of the circuit board 12, after which the work heads 60 and 62 stop descending. As a result, the lower ends of the pair of leads 108 face the outer wall surface of the pair of bending rods 124 where the notched holes 130 are not formed, in the Y direction. Then, the controller 190 activates the Y-direction movement device 152 to move the clinch unit 100 in the Y2 direction, opposite to the Y1 direction. At this time, the pair of leads 108 come into contact with the outer wall surface of the pair of bending rods 124, causing the pair of leads 108 to bend. As a result, as shown in Figure 19, the pair of leads 108 bend in the same direction (direction Y2), preventing them from coming out of the through-hole 104 in the circuit board 12, and the lead component 106 is attached to the circuit board 12.

[0037] In this way, the clinch unit 100 can bend a pair of leads 108 in various directions by having the bending rod 124 contact the leads 108 inserted into the through holes 104 of the circuit board 12. This solves various problems such as the need to increase the installation space on the production line and delays in production cycle time. It also eliminates the need for manual installation by workers, enabling full automation.

[0038] Specifically, when mounting multiple leaded components on a single circuit board, it is desirable to bend the leads in various directions to avoid interference between adjacent leaded components. However, conventional cut-and-clinch units use a shearing mechanism with movable and fixed blades, making it impossible to cut and bend leads in various directions. For example, the first cut-and-clinch unit cuts and bends a pair of leads in directions that bring them closer together and another pair of leads that separate them, while the second cut-and-clinch unit cuts and bends a pair of leads in an N-shape. Therefore, it is necessary to install a component mounting machine equipped with the first cut-and-clinch unit and a component mounting machine equipped with the second cut-and-clinch unit in the factory. Installing two component mounting machines in this way increases the required installation space. Furthermore, when mounting components on a single circuit board using two component mounting machines, the production cycle is delayed due to transport time, etc. For this reason, for example, when a component mounting machine equipped with a first cut-and-clinch unit performs component mounting and it is necessary to bend a pair of leads into an N-shape, it is conceivable that an operator would manually bend the pair of leads into an N-shape. However, in recent years, automation has become desirable, so it is undesirable for operators to manually bend the leads. On the other hand, as described above, the clinch unit 100 can bend a pair of leads 108 in various directions. This solves various problems such as the need to increase the installation space on the production line and delays in production cycle time, and also eliminates the need for manual mounting by operators, enabling full automation.

[0039] Furthermore, in the clinch unit 100, the bending body 120 is replaced according to the wire diameter of the lead 108 to be bent, so that leads 108 of various wire diameters can be bent. Specifically, as shown in Figure 20, a first pair of bending bodies 120A and a second pair of bending bodies 120B are provided. Each of the first pair of bending bodies 120A consists of a body 122A, a bending rod 124A, and a support pin 126A, and each of the second pair of bending bodies 120B consists of a body 122B, a bending rod 124B, and a support pin 126B. The body 122A of the first bending body 120A and the body 122B of the second bending body 120B are approximately the same size and are detachable from the slide body 112 of the clinch unit 100 by bolts (not shown). Furthermore, the support pin 126A of the first bent body 120A and the support pin 126B of the second bent body 120B are approximately the same size. On the other hand, the bending rod 124A of the first bent body 120A and the bending rod 124B of the second bent body 120B are different in size.

[0040] Specifically, the thickness WA of the bending rod 124A of the first bending body 120A is thinner than the thickness WB of the bending rod 124B of the second bending body 120B. Also, the height LA ​​of the bending rod 124A of the first bending body 120A is longer than the height LB of the bending rod 124B of the second bending body 120B. Furthermore, the height of the support pin 126A erected next to the bending rod 124A of the first bending body 120A is approximately the same as the height of the support pin 126B erected next to the bending rod 124B of the second bending body 120B. For this reason, the distance between the upper end of the support pin 126A and the upper end of the bending rod 124A in the first bending body 120A is smaller than the distance between the upper end of the support pin 126B and the upper end of the bending rod 124B in the second bending body 120B. In other words, in the second bent body 120B, the distance between the upper end of the support pin 126B and the upper end of the bending rod 124B is greater than the distance between the upper end of the support pin 126A and the upper end of the bending rod 124A in the first bent body 120A. Also, the inner dimension of the notch hole 130A of the bending rod 124A in the first bent body 120A is smaller than the inner dimension of the notch hole 130B of the bending rod 124B in the second bent body 120B. For this reason, the first pair of bent bodies 120A corresponds to a lead 108 with a thin wire diameter, and when the lead 108 to be bent has a thin wire diameter, the first pair of bent bodies 120A is attached to the pair of slide bodies 112 of the clinch unit 100. On the other hand, when the lead 108 to be bent has a thick wire diameter, the second pair of bent bodies 120B is attached to the pair of slide bodies 112 of the clinch unit 100. In this way, by exchanging the first pair of bending bodies 120A and the second pair of bending bodies 120B according to the wire diameter of the lead 108 to be bent, leads 108 with different wire diameters can be appropriately bent.

[0041] More specifically, as shown in Figure 21, the pair of leads 108A of the lead component 106A have a thin wire diameter, and these thin wire leads 108A are bent by the first pair of bent bodies 120A. Therefore, when installing the lead component 106A, the first pair of bent bodies 120A are attached to the pair of slide bodies 112 of the clinch unit 100, and the unit moving device 102 operates so that the notched holes 130A of the bending rods 124A of the first pair of bent bodies 120A are positioned below the pair of through holes 104. Then, the pair of leads 108A of the lead component 106A are inserted into the pair of through holes 104, and thus into the notched holes 130A of the bending rods 124A of the first pair of bent bodies 120A. At this time, the thin wire leads 108A are properly inserted into the notched holes 130A with a small inner diameter. Then, as the pair of bent bodies 120A are separated by the operation of the electromagnetic motor 118, the pair of leads 108A are bent in a direction that separates them from each other, as shown in Figure 22. At this time, the leads 108A are bent by fitting between the upper end of the support pin 126A and the upper end of the bending rod 124A, but because the bending rod 124A is long, the space between the upper end of the support pin 126A and the upper end of the bending rod 124A is narrow. However, if the leads 108A have a thin wire diameter, they will fit appropriately between the upper end of the support pin 126A and the upper end of the bending rod 124A, and the leads 108A will be bent appropriately.

[0042] Furthermore, as shown in Figure 23, the pair of leads 108B of the lead component 106B have a thick wire diameter, and these thick wire diameter leads 108B are bent by a second pair of bent bodies 120B. Therefore, when installing the lead component 106B, the second pair of bent bodies 120B are attached to a pair of slide bodies 112 of the clinch unit 100, and the unit moving device 102 operates so that the notched holes 130B of the bending rods 124B of the second pair of bent bodies 120B are positioned below the pair of through holes 104. Then, when the pair of leads 108B of the lead component 106B are inserted into the pair of through holes 104, they are inserted into the notched holes 130B of the bending rods 124B of the second pair of bent bodies 120B. At this time, the thick wire diameter leads 108B are properly inserted into the notched holes 130B, which have a larger inner diameter. Then, as the pair of bent bodies 120B separate due to the operation of the electromagnetic motor 118, the pair of leads 108B are bent in a direction that separates them from each other, as shown in Figure 24. At this time, the leads 108B are bent by fitting between the upper end of the support pin 126B and the upper end of the bending rod 124B, but because the bending rod 124B is short, there is a wide gap between the upper end of the support pin 126B and the upper end of the bending rod 124B. Therefore, the lead 108B with a thick wire diameter fits appropriately between the upper end of the support pin 126B and the upper end of the bending rod 124B, and the lead 108A is bent appropriately. In addition, because the bending rod 124B of the second bent body 120B is thick, it can appropriately bend the lead 108B with a thick wire diameter.

[0043] Thus, the clinching device 34 is equipped with a first pair of bending bodies 120A corresponding to a thin wire diameter lead 108A and a second pair of bending bodies 120B corresponding to a thick wire diameter lead 108B. By replacing the bending bodies 120 according to the wire diameter of the lead 108 to be bent, leads 108 of different wire diameters can be appropriately bent.

[0044] Incidentally, the clinch device 34 in the above embodiment is an example of a bending unit. The clinch unit 100 is an example of a bending head. The unit moving device 102 is an example of a moving device. The through-hole 104 is an example of a through-hole. The lead component 106 is an example of a lead component. The lead 108 is an example of a lead. The first pair of bent bodies 120A is an example of the first pair of bent claws. The second pair of bent bodies 120B is an example of the second pair of bent claws. The electromagnetic motors 164 and 170 are examples of electromagnetic motors.

[0045] As described above, the first embodiment has the following effects.

[0046] The clinch unit 100 has a pair of bent bodies 120 that bend a pair of leads 108 of a lead component 106 inserted into a pair of through-holes 104 of the circuit base material 12, and the pair of bent bodies 120 are detachably attached. Then, the pair of bent bodies 120 are exchanged according to the wire diameter of the lead 108 to be bent. Thereby, leads 108 of various wire diameters can be appropriately bent by the pair of bent bodies 120.

[0047] Also, any one of the first pair of bent bodies 120A corresponding to the thin wire diameter lead 108A and the second pair of bent bodies 120B corresponding to the thick wire diameter lead 108B is attached to the clinch unit 100. And, the length dimension of the bending rod 124A of the first pair of bent bodies 120A is longer than the length dimension of the bending rod 124B of the second pair of bent bodies 120B. That is, the length dimension of the bending rod 124B is shorter than the length dimension of the bending rod 124A. For this reason, the space between the upper end of the support pin 126B and the upper end of the bending rod 124B is wider than the space between the upper end of the support pin 126A and the upper end of the bending rod 124A. Thereby, by attaching the second pair of bent bodies 120B to the clinch unit 100, the thick wire diameter lead 108B can be appropriately bent.

[0048] Further, the clinch device 34 includes a unit moving device 102 that moves the clinch unit 100 in the horizontal direction. Then, by the unit moving device 102 moving the clinch unit 100 in the horizontal direction, a pair of bending bodies 120 bend a pair of leads 108. As a result, by the unit moving device 102 moving the clinch unit 100 in various directions, it becomes possible to bend the pair of leads 108 in various directions.

[0049] Further, the unit moving device 102 moves the clinch unit 100 in the horizontal direction using electromagnetic motors 164 and 170 as drive sources. As a result, the unit moving device 102 can easily move the clinch unit 100 in various directions.

[0050] Further, the clinch device 34 of the above-described first embodiment bends a pair of leads 108 of the lead component 106, while the clinch device of the second embodiment cuts and bends a pair of leads of the lead component. Specifically, as shown in FIG. 25, the clinch device 200 of the second embodiment includes a cut-and-clinch unit 202 and a unit moving device 204.

[0051] As shown in FIG. 26, the cut-and-clinch unit 202 includes a unit body 210 and a pair of slide bodies 212. At the upper end of the unit body 210, slide rails 216 are arranged so as to extend linearly, and the pair of slide bodies 212 are supported slidably by the slide rails 216. As a result, the pair of slide bodies 212 approach and separate linearly. Also, the distance between the pair of slide bodies 212 is controlled by the drive of an electromagnetic motor (not shown).

[0052] Furthermore, each of the pair of slide bodies 212 has a fixed body 220 and a movable body 222, and the fixed body 220 is slidably held by a slide rail 216. Two slide rails 226 are fixed to the back side of the fixed body 220 so as to extend in the direction in which the pair of slide bodies 212 are aligned, and the movable body 222 is slidably held by these two slide rails 226. The position of the movable body 222 is controlled to slide relative to the fixed body 220 by driving an electromagnetic motor (not shown).

[0053] Furthermore, as shown in Figures 27 and 28, the upper end of the fixed body 220 is tapered, and a first insertion hole 230 is formed so as to penetrate the upper end vertically. The opening edge of the first insertion hole 230 toward the upper end surface is a fixed blade (see Figure 29) 231. The lower end of the first insertion hole 230 opens toward the front side of the fixed body 220, and a waste box 232 for collecting cut lead scraps is provided below this opening toward the side.

[0054] Furthermore, the upper end of the movable body 222 is also tapered, and an L-shaped bent portion 233 is formed at its upper end. The bent portion 233 extends above the upper end surface of the fixed body 220. The first insertion hole 230, which opens to the upper end surface of the fixed body 220, is covered by the bent portion 233, but a second insertion hole 236 is formed in the bent portion 233 so as to be opposite to the first insertion hole 230. The second insertion hole 236 is a through hole that penetrates the bent portion 233 in the vertical direction, and the inner circumferential surface of the second insertion hole 236 is a tapered surface in which the inner diameter decreases as it goes downwards. The opening edge of the second insertion hole 236 to the lower end surface of the bent portion 233 is a movable blade (see Figure 29) 238. In addition, a guide groove 239 is formed on the upper end surface of the bent portion 233 so as to extend in the sliding direction of the movable body 222. The guide groove 239 is formed to straddle the opening of the second insertion hole 236, and the guide groove 239 and the second insertion hole 236 are connected. The guide groove 239 opens on both sides of the bent portion 233.

[0055] Furthermore, a projection 237 is formed at the upper end of the fixed body 220, projecting upward at a position opposite to the bent portion 233 of the movable body 222. The upper end of this projection 237 is located above the upper surface of the bent portion 233 of the movable body 222.

[0056] Furthermore, the movable body 222 is composed of a movable main body 240 and a movable replacement body 242. The movable main body 240 constitutes the lower part of the movable body 222 and is slidably supported by a slide rail 226, as shown in Figure 27. On the other hand, the movable replacement body 242 constitutes the upper part of the movable body 222 and includes a bent portion 233. The movable replacement body 242 is positioned and fixed by being bolted to the movable main body 240, and the movable replacement body 242 can be removed from the movable main body 240 by removing the bolts. In other words, the movable replacement body 242 is detachable from the movable main body 240. Similarly to the movable body 222, the fixed body 220 is composed of a fixed main body 244 which constitutes the lower part of the fixed body 220 and a fixed replacement body 246 which constitutes the upper part of the fixed body 220, and the fixed replacement body 246 is detachable from the fixed main body 244 by being bolted.

[0057] Furthermore, the unit moving device 204 has substantially the same structure as the unit moving device 102 of the first embodiment, and the cut-and-clinch unit 202 is arranged on the upper surface of the rotary table 250 of the unit moving device 204, as shown in Figure 25. As a result, the cut-and-clinch unit 202 can move to any position in the X, Y, and Z directions, and rotates at any angle due to the rotation of the rotary table 250.

[0058] The clinching device 200 is equipped with a control device (see Figure 25) 260, which stores a control program (see Figure 25) 262. In accordance with the processing of the control program 262, the clinching device 200 cuts and bends a pair of leads (see Figure 29) 272 of a lead component (see Figure 29) 270 inserted into a pair of through holes 104 of the circuit board 12.

[0059] More specifically, before the pair of leads 272 of the lead component 270 are inserted into the pair of through holes 104, the distance between the pair of slide bodies 212 is changed in the cut-and-clinch unit 202 so that the distance between the second insertion holes 236 of the pair of slide bodies 212 is the same as the distance between the pair of through holes 104. The rotary table 250 also rotates so that the direction in which the pair of through holes 104 are aligned matches the direction in which the two second insertion holes 236 of the pair of slide bodies 212 are aligned. Then, the unit moving device 204 operates, causing the cut-and-clinch unit 202 to move so that the XY coordinates of the second insertion holes 236 match the XY coordinates of the through holes 104 of the circuit board 12. As a result, the second insertion holes 236 of the slide body 212 and the through holes 104 of the circuit board 12 overlap in the vertical direction.

[0060] Next, the cut-and-clinch unit 202 rises due to the operation of the unit moving device 204, so that the upper end of the projection 237 of the fixed body 220 contacts the lower surface of the circuit board 12, or is positioned slightly below and close to the lower surface of the circuit board 12. In this way, the operation of the unit moving device 204 is controlled so that the cut-and-clinch unit 202 is positioned below the circuit board 12 with the second insertion hole 236 of the slide body 212 and the through hole 104 of the circuit board 12 overlapping.

[0061] Then, a pair of leads 272 of the lead component 270 are inserted into a pair of through holes 104 of the circuit board 12. At this time, the lead component 270 is pressed against the circuit board 12, so that the leads 272 of the lead component 270 are inserted into the through holes 104 to their roots, and the bottom surface of the component body 271 of the lead component 270 comes into contact with the top surface of the circuit board 12. As the lead component 270 is pressed against the circuit board 12, the circuit board 12 is pressed downwards, but the bottom surface of the circuit board 12 is supported by the projection 237 of the fixed body 220. In this way, once the leads 272 of the lead component 270 are inserted into the through holes 104 to their roots, the tips of the leads 272 are inserted into the first insertion hole 230 of the fixed body 220 via the second insertion hole 236 of the movable body 222 of the cut and clinch unit 202, as shown in Figure 29.

[0062] Next, when the tip of the lead 272 is inserted into the first insertion hole 230 of the fixed body 220, the pair of movable bodies 222 slide apart due to the operation of the electromagnetic motor. As a result, the lead 272 is cut by the fixed blade 231 of the first insertion hole 230 and the movable blade 238 of the second insertion hole 236, as shown in Figure 30. The tip of the lead 272 that is separated by the cutting falls inside the first insertion hole 230 and is stored in the waste box 232. A continuity sensor (not shown) is provided on the fixed blade 231 of the first insertion hole 230, and when the lead 272 is cut by the fixed blade 231 and the movable blade 238, the continuity sensor and the lead 272 come into contact, and the continuity sensor detects contact with the lead 272. Therefore, whether or not the lead 272 has been cut is detected based on the value detected by the continuity sensor. In the cut-and-clinch unit 202, a pair of leads 272 are cut. When each of the leads 272 is cut by the fixed blade 231 and the movable blade 238, the presence or absence of each lead being cut is detected based on the value detected by the continuity sensor.

[0063] Furthermore, the pair of movable bodies 222 slide further apart even after the lead 272 has been cut. As a result, the cut lead 272 bends along the tapered surface of the inner circumference of the second insertion hole 236 as the movable body 222 slides, and as the movable body 222 slides further, the lead 272 bends along the guide groove 239 provided in the movable replacement body 242. In this way, the pair of cut leads 272 bend apart from each other, preventing them from coming out of the through hole 104, and the lead component 270 is mounted on the circuit board 12.

[0064] Furthermore, in the cut-and-clinch unit 202, similar to the clinch unit 100, the movable interchangeable body 242 and the fixed interchangeable body 246 are exchanged according to the wire diameter of the lead 272 to be bent, so that leads 272 of various wire diameters can be bent. Specifically, as shown in Figure 31, a first movable interchangeable body 242A and a first fixed interchangeable body 246A, and a second movable interchangeable body 242B and a second fixed interchangeable body 246B are provided. The first movable interchangeable body 242A consists of a main body 280A and a bending portion 233A, with the bending portion 233A extending laterally from the upper end of the main body 280A. The second movable interchangeable body 242B consists of a main body 280B and a bending portion 233B, with the bending portion 233B extending laterally from the upper end of the main body 280B. The lower end of the main body 280A of the first movable replacement body 242A and the lower end of the main body 280B of the second movable replacement body 242B are approximately the same size and are detachably attached to the movable body (see Figure 28) 240 of the cut-and-clinch unit 202 by bolts (not shown). Furthermore, the vertical thickness dimension of the bent portion 233B of the second movable replacement body 242B is greater than the vertical thickness dimension of the bent portion 233A of the first movable replacement body 242A. In addition, a second insertion hole 236A is formed in the bent portion 233A that penetrates in the vertical direction, and a second insertion hole 236B is formed in the bent portion 233B that penetrates in the vertical direction. Furthermore, the inner diameter of the second insertion hole 236B of the bent portion 233B is greater than the inner diameter of the second insertion hole 236A of the bent portion 233A. Furthermore, a guide groove 239A is formed on the upper surface of the bent portion 233A so as to straddle the second insertion hole 236A, and a guide groove 239B is formed on the upper surface of the bent portion 233B so as to straddle the second insertion hole 236B. The inner dimensions of the guide groove 239B of the bent portion 233B are larger than the inner dimensions of the guide groove 239A of the bent portion 233A.

[0065] Furthermore, the first fixed replacement body 246A is composed of a main body 290A and a projection 237A, with the projection 237A extending upward from the upper end of the main body 290A. Similarly, the second fixed replacement body 246B is composed of a main body 290B and a projection 237B, with the projection 237B extending upward from the upper end of the main body 290B. The lower end of the main body 290A of the first fixed replacement body 246A and the lower end of the main body 290B of the second fixed replacement body 246B are approximately the same size, and are detachably attached to the fixed body (see Figure 28) 244 of the cut-and-clinch unit 202 by bolts (not shown). In addition, the height dimension of the projection 237B of the second fixed replacement body 246B is greater than the height dimension of the projection 237A of the first fixed replacement body 246A. Furthermore, the upper end surface of the main body of the first fixed replacement body 246A is a stepped surface 292A that is lower than the upper end surface of the projection 237A, and this stepped surface 292A faces the bent portion 233A of the first movable replacement body 242A. A first insertion hole 230A is formed in the stepped surface 292A, penetrating in the vertical direction, and the inner diameter of the first insertion hole 230A is the same as the inner diameter of the second insertion hole 236A formed in the bent portion 233A of the first movable replacement body 242A. Furthermore, the upper end surface of the main body of the second fixed replacement body 246B is a stepped surface 292B that is lower than the upper end surface of the projection 237B, and this stepped surface 292B faces the bent portion 233B of the second movable replacement body 242B. Furthermore, a first insertion hole 230B is formed in the stepped surface 292B, penetrating in the vertical direction, and the inner diameter of the first insertion hole 230B is the same as the inner diameter of the second insertion hole 236B formed in the bent portion 233B of the second movable replacement body 242B. For this reason, the inner diameter of the first insertion hole 230B of the second fixed replacement body 246B is larger than the inner diameter of the first insertion hole 230A of the first fixed replacement body 246A.

[0066] Thus, the inner diameter of the second insertion hole 236B, the inner dimension of the guide groove 239B, and the thickness of the bent portion 233B of the second movable replacement body 242B are larger than the inner diameter of the second insertion hole 236A, the inner dimension of the guide groove 239A, and the thickness of the bent portion 233A of the first movable replacement body 242A. Also, the inner diameter of the first insertion hole 230B and the height of the projection 237B of the second fixed replacement body 246B are larger than the inner diameter of the first insertion hole 230A and the height of the projection 237A of the first fixed replacement body 246A. For this reason, the second movable replacement body 242B and the second fixed replacement body 246B correspond to leads 272 with a thicker wire diameter, and when the wire diameter of the lead 272 to be bent is thick, the second movable replacement body 242B is attached to the movable body 240, and the second fixed replacement body 246B is attached to the fixed body 244. Furthermore, the first movable replacement body 242A and the first fixed replacement body 246A correspond to leads 272 with thin wire diameters. When the lead 272 to be bent has a thin wire diameter, the first movable replacement body 242A is attached to the movable body 240, and the first fixed replacement body 246A is attached to the fixed body 244. In this way, by exchanging the movable replacement body 242 and the fixed replacement body 246 according to the wire diameter of the lead 272 to be bent, leads 272 with different wire diameters can be bent appropriately.

[0067] Furthermore, in the clinching device 200, when cutting and bending a pair of leads 272 of the lead component 270, the cut-and-clinch unit 202 is positioned below the circuit board 12. At that time, as shown in Figure 29, the distance between a pair of slide bodies 212 is changed so that the distance between the second insertion holes 236 of the pair of slide bodies 212 is the same as the distance between the pair of through holes 104. However, depending on the distance between the pair of through holes 104, that is, the distance between a pair of leads 272 (hereinafter referred to as "lead distance"), it may not be possible to make the distance between the second insertion holes 236 of the pair of slide bodies 212 the same as the lead distance.

[0068] Specifically, as shown in Figure 32, the pitch of the pair of leads 302 of the lead component 300 is narrow, and the distance LA between leads is shorter than the distance LB between the second insertion holes 236 when the pair of slide bodies 212 are brought as close together as possible. Therefore, the distance between the second insertion holes 236 of the pair of slide bodies 212 cannot be made the same as the distance between leads. More specifically, the fixed body 220 and movable body 222 that constitute the slide body 212 are equipped with a mechanism for cutting leads, such as a first insertion hole 230, a fixed blade 231, a second insertion hole 236, a movable blade 238, etc. For this reason, the outer diameter of the fixed body 220 and movable body 222 is somewhat large, and the distance between the second insertion holes 236 when the pair of slide bodies 212 are brought as close together as possible is LB. In other words, the distance between the second insertion holes 236 cannot be shorter than LB. On the other hand, some components mounted on the circuit board 12, such as the lead component 300, have a pitch distance of LA. Corresponding to a pair of leads 302 of such lead component 300, a pair of through holes 306 are formed in the circuit board 12. Since the distance between the pair of through holes 306 is the same as the lead distance LA, the distance between a pair of second insertion holes 236 cannot be the same as the distance between the pair of through holes 306. In this way, if the distance between a pair of second insertion holes 236 cannot be the same as the distance between a pair of through holes 306, i.e., the lead distance LA, then the pair of leads 302 cannot be inserted into the pair of second insertion holes 236, and therefore the pair of leads 302 cannot be cut or bent.

[0069] In light of these considerations, in the clinching device 200, a pair of leads 302 are bent one by one at different timings. Specifically, before a pair of leads 302 of the lead component 300 are inserted into a pair of through holes 306 of the circuit board 12, the distance between a pair of slide bodies 212 is changed so that the distance between a pair of second insertion holes 236 becomes LC (see Figure 33), as shown in Figure 33. LC is the distance between a pair of second insertion holes 236 such that when one second insertion hole 236a of the pair of second insertion holes 236 is located directly below one through hole 306a of the pair of through holes 306, the other second insertion hole 236b of the pair of second insertion holes 236 is not located below the other through hole 306b of the pair of through holes 306. Then, when the distance between the pair of second insertion holes 236 is changed to LC, the cut-and-clinch unit 202 moves by the operation of the unit moving device 204 so that one of the second insertion holes 236a of the pair of second insertion holes 236 is positioned directly below one of the through holes 306a of the pair of through holes 306. Subsequently, the pair of leads 302 of the lead component 300 are inserted into the pair of through holes 306. As a result, as shown in Figure 34, the lead 302a inserted into the through hole 306a is inserted into the second insertion hole 236a. On the other hand, the lead 302b inserted into the through hole 306b is not inserted into the second insertion hole 236b and does not interfere with the slide body 212b. Then, as the movable body 222 of the second insertion hole 236a into which the lead 302a is inserted slides outward, the lead 302a is cut and bent, as shown in Figure 35. On the other hand, lead 302b is neither cut nor bent. Since only one of the pair of leads 302, lead 302a, is cut, the cutting of lead 302a is detected based on the value detected by the continuity sensor when lead 302a is cut by the fixed blade 231 and the movable blade 238.

[0070] As the lead 302a is cut and bent, the cut-and-clinch unit 202 descends due to the operation of the unit moving device 204. At this time, the cut-and-clinch unit 202 descends until its upper end is below the lower end of the lead 302b. Then, the cut-and-clinch unit 202 moves due to the operation of the unit moving device 204 so that the other second insertion hole 236b of the pair of second insertion holes 236 is directly below the other through hole 306b of the pair of through holes 306. At this time, the distance between the pair of second insertion holes 236 is maintained at LC. Then, the cut-and-clinch unit 202 rises due to the operation of the unit moving device 204. As a result, as shown in Figure 36, the lead 302b inserted into the through hole 306b is inserted into the second insertion hole 236b. On the other hand, the lead 302a inserted into the through hole 306a is already bent and does not interfere with the sliding body 212a. Then, as the movable body 222 of the second insertion hole 236b into which the lead 302b is inserted slides outward, the lead 302b is cut and bent, as shown in Figure 37. Since only one of the pair of leads 302, the cutting of the lead 302b is detected based on the value detected by the continuity sensor when the lead 302b is cut by the fixed blade 231 and the movable blade 238.

[0071] In this way, the cut-and-clinch unit 202 cuts and bends each lead 302 at different timings, thereby enabling the appropriate cutting and bending of a pair of leads 302 with a short distance between them. Specifically, in the clinching device 200, when the distance between a pair of leads of a lead component is less than the distance LB between the second insertion holes 236 when the pair of slide bodies 212 are brought closer together, the cut-and-clinch unit 202 cuts and bends each lead 302 at different timings. On the other hand, when the distance between a pair of leads of a lead component is greater than or equal to the distance LB between the second insertion holes 236 when the pair of slide bodies 212 are brought closer together, the cut-and-clinch unit 202 cuts and bends a pair of leads 272 at the same timing, as shown in Figure 30. In this way, by changing the cutting and bending manner of the leads according to the distance between them, it becomes possible to appropriately cut and bend leads with various distances between them.

[0072] The control program 262 is programmed to determine whether a pair of leads are cut one at a time at different timings or simultaneously. In other words, when the control program 262 is created, it is programmed to cut a pair of leads one at a time at different timings for lead components with a lead distance of less than LB, and to cut a pair of leads simultaneously for lead components with a lead distance of LB or more. As the clinching device 200 operates according to the processing of the control program 262, a pair of leads is cut one at a time at different timings for lead components with a lead distance of less than LB, and a pair of leads is cut simultaneously for lead components with a lead distance of LB or more.

[0073] Furthermore, in the above explanation, when the distance between leads is less than LB, a pair of leads are cut one by one at different timings. However, even when the distance between leads is LB or greater, a pair of leads may also be cut one by one at different timings. Specifically, as shown in Figure 38, an electronic component (hereinafter referred to as "pre-installed component") 310 may already be attached to the back surface of the circuit board 12 before the leads 272 of the lead component 270 are cut. If the pre-installed component 310 is installed near the through hole 104, when the movable body 222 of the slide body 212 slides to cut the leads 272 inserted into the through hole 104, the movable body 222 and the pre-installed component 310 interfere with each other.

[0074] More specifically, a pair of through holes 104 are formed side by side in the X direction, and a pre-attached component 310 is mounted on the back surface of the circuit board 12 at a position slightly spaced in the X direction from one of the through holes 104a. Then, the cut-and-clinch unit 202 moves so that a pair of second insertion holes 236 are positioned directly below the pair of through holes 104, and a pair of leads 272 are inserted into the pair of through holes 104, thereby inserting the pair of leads 272 into the pair of second insertion holes 236. At this time, when a pair of movable bodies 222 slide in a direction away from each other in order to cut the pair of leads 272, one of the movable bodies 222a interferes with the pre-attached component 310.

[0075] In light of this, even if there is a risk of interference between the movable body 222 and the pre-attached part 310 during lead cutting, the pair of leads are cut one by one at different timings. Specifically, before the pair of leads 272 of the lead part 270 are inserted into the pair of through holes 104 of the circuit board 12, the rotary table 250 rotates so that the direction in which the pair of second insertion holes 236 are aligned is the Y direction, as shown in Figure 39. Then, the cut-and-clinch unit 202 moves by the operation of the unit moving device 204 so that one of the second insertion holes 236a of the pair of second insertion holes 236 is positioned directly below one of the through holes 104a of the pair of through holes 104. Note that since Figure 39 is shown from a viewpoint in the X direction, only one of the pair of through holes 104a that are aligned in the X direction is shown.

[0076] Then, a pair of leads 272 of the lead component 270 are inserted into a pair of through holes 104. As a result, as shown in Figure 40, the lead 272a inserted into the through hole 104a is inserted into the second insertion hole 236a. Note that since Figure 40 is also shown from a viewpoint in the X direction, only one of the pair of through holes 104 formed side by side in the X direction, the through hole 104a, and one of the pair of leads 272a inserted into the pair of through holes 104 are shown. Then, as the movable body 222a of the second insertion hole 236a into which the lead 272a is inserted slides outward, the lead 272a is cut and bent. At this time, the movable body 222a slides in the Y direction, and since the pre-attached component 310 mounted near the through hole 104a is located in the X direction of the through hole 104a, the movable body 222a does not interfere with the pre-attached component 310. Since only one of the pair of leads 272a is cut, the cutting of lead 272a is detected based on the value detected by the continuity sensor when lead 272a is cut by the fixed blade 231 and the movable blade 238.

[0077] As the lead 272a is cut and bent, the cut-and-clinch unit 202 descends due to the operation of the unit moving device 204. At this time, the cut-and-clinch unit 202 descends until its upper end is below the lower end of the lead 272b. The cut-and-clinch unit 202 then moves due to the operation of the unit moving device 204 so that the other second insertion hole 236b of the pair of second insertion holes 236 is directly below the other through hole 104b of the pair of through holes 104. The cut-and-clinch unit 202 then rises due to the operation of the unit moving device 204. As a result, as shown in Figure 41, the lead 272b inserted into the through hole 104b is inserted into the second insertion hole 236b. The movable body 222b of the second insertion hole 236b into which the lead 272b is inserted slides outward, causing the lead 272b to be cut and bent. Furthermore, since only one of the pair of leads 272, lead 272b, is cut, the cutting of lead 272b is detected based on the value detected by the continuity sensor when lead 272b is cut by the fixed blade 231 and the movable blade 238.

[0078] Thus, even when there is a risk of interference between the movable body 222 and the attached part 310, the cut-and-clinch unit 202 cuts and bends each of the pair of leads 272 at different timings, thereby properly cutting and bending the pair of leads 272 without causing interference between the movable body and the leads.

[0079] In the second embodiment described above, the clinching device 200 is an example of a bending unit. The cut-and-clinch unit 202 is an example of a bending head. The unit moving device 204 is an example of a moving device. The movable blade 238 is an example of a cutter. The first pair of movable interchangeable parts 242A is an example of a first pair of bending claws. The second pair of movable interchangeable parts 242B is an example of a second pair of bending claws. The lead part 270 is an example of a lead part. The lead 272 is an example of a lead. The lead part 300 is an example of a lead part. The lead 302 is an example of a lead. The through hole 306 is an example of a through hole.

[0080] In the second embodiment described above, the following effects are achieved.

[0081] The movable body 222 has a movable blade 238 for cutting the reeds, and the cut-and-clinch unit 202 cuts a pair of reeds one by one with the movable blade 238 at different timings and bends them with the movable body 222. This makes it possible to cut and bend a pair of reeds even in situations where it is difficult to cut a pair of reeds at the same time.

[0082] Furthermore, if there is a risk of interference between the pre-attached component 310 and the movable body 222, which are already mounted on the circuit board 12, when the cut-and-clinch unit 202 cuts and bends a pair of leads one by one at different timings. This ensures that a pair of leads can be properly cut and bent even when there is a risk of interference between the pre-attached component 310 and the movable body 222.

[0083] Furthermore, when the distance between leads to bend is less than LB, the cut-and-clinch unit 202 cuts and bends each lead in a pair at different timings. On the other hand, when the distance between leads to bend is LB or greater, the cut-and-clinch unit 202 cuts and bends the pair of leads at the same timing. In this way, by changing the cutting and bending method of the leads according to the distance between leads, it becomes possible to appropriately cut and bend leads with various distances between leads.

[0084] It should be noted that the present invention is not limited to the above embodiments, and can be implemented in various forms with various modifications and improvements based on the knowledge of those skilled in the art. Specifically, in the first embodiment, a first bendable body 120A corresponding to a thin wire diameter lead and a second bendable body 120B corresponding to a thick wire diameter lead are provided. In the second embodiment, a first movable replaceable body 242A and a fixed replaceable body 246A corresponding to a thin wire diameter lead and a second movable replaceable body 242B and a fixed replaceable body 246B corresponding to a thick wire diameter lead are provided. On the other hand, three or more types of bendable bodies 120 may be provided according to three or more wire diameters, and three or more types of movable replaceable bodies 242 and fixed replaceable bodies 246 may be provided according to three or more wire diameters.

[0085] Furthermore, in the first embodiment, the support pin 126A of the first bent body 120A and the support pin 126B of the second bent body 120B are approximately the same size, but the support pin 126A of the first bent body 120A and the support pin 126B of the second bent body 120B may be of different sizes. For example, the length dimension of the support pin 126A of the first bent body 120A may be different from the length dimension of the support pin 126B of the second bent body 120B. By making the length dimensions of the support pin 126A and the support pin 126B different in this way, the distance between the upper end of the bent rod 124A and the upper end of the support pin 126A can be made different from the distance between the upper end of the bent rod 124B and the upper end of the support pin 126B.

[0086] This specification also discloses a technical concept in which the "bending unit described in claim 1" in claim 3 of the original application was changed to "bending unit described in claim 1 or claim 2".

[0087] 34: Clinching device (bending unit) 100: Clinching unit (bending head) 102: Unit moving device (moving device) 104: Through hole 106: Lead part 108: Lead 120A: Bending body (first bending claw) 120B: Bending body (second bending claw) 164: Electromagnetic motor 170: Electromagnetic motor 200: Clinching device (bending unit) 202: Cut and clinch unit (bending head) 204: Unit moving device (moving device) 238: Movable blade (cutter) 242A: Movable interchangeable body (first bending claw) 242B: Movable interchangeable body (second bending claw) 270: Lead part 272: Lead 300: Lead part 302: Lead 306: Through hole

Claims

1. A bending unit comprising a bending head having a pair of bending claws for bending a pair of leads of a lead component inserted into a pair of through holes in a circuit board, the pair of bending claws being detachably mounted, and the pair of bending claws being replaced according to the wire diameter of the lead to be bent.

2. The bending unit according to claim 1, wherein any pair of bending claws from a first pair of bending claws corresponding to a thin wire diameter lead and a second pair of bending claws corresponding to a thick wire diameter lead are mounted on the bending head, and the length of each of the first pair of bending claws is longer than the length of each of the second pair of bending claws.

3. The bending unit according to claim 1, comprising a moving device for moving the bending head in a horizontal direction, wherein the moving device moves the bending head in a horizontal direction, causing the pair of bending claws to bend the pair of leads.

4. The bending unit according to claim 3, wherein the moving device moves the bending head in the horizontal direction using an electromagnetic motor as the drive source.

5. The bending unit according to any one of claims 1 to 4, wherein each of the pair of bending claws has a cutter for cutting a lead, and the bending head cuts the pair of leads one by one with the cutter at different timings and bends them with the bending claws.

6. The bending unit according to claim 5, wherein, when the bending head cuts and bends the lead to be bent, there is a risk that the bending claws will interfere with a component already mounted on the substrate, and the pair of leads are cut one by one by the cutter at different timings and bent by the bending claws.

7. The bending unit according to claim 5, wherein the bending head cuts the pair of leads to be bent one by one with the cutter at different timings and bends them with the bending claws when the distance between the pair of leads to be bent is less than a predetermined distance, and cuts the pair of leads with the cutter at the same timing and bends them with the bending claws when the distance between the pair of leads to be bent is greater than or equal to the predetermined distance.

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