Rotating mounting head and component mounting machine

Abstract

The multiple driven gears (432b) respectively provided on the multiple nozzle shafts (43) are arranged along the periphery of the driving gear (44) and mesh with the driving gear (44). Therefore, by rotating the driving gear (44), the multiple shafts can be rotated. Moreover, since the rotation of the driving gear (44) is transmitted to the nozzle shaft (43) by the meshing of the driving gear (44) as a scissor-type gear and the multiple driven gears (432b), the backlash between the driving gear (44) and the driven gear (432b) can be suppressed, and there is no need to provide a backlash-free gear on each of the multiple nozzle shafts (43), which can suppress the cost of the mounting head (4).

Description

Technical Field

[0001] The present invention relates to a technology for mounting a component on a substrate using a rotary mounting head that sucks the component using a suction nozzle mounted on each of a plurality of shafts arranged in a circumferential shape. Background Art

[0002] In the past, there is a known rotary mounting head that uses a suction nozzle installed at the lower end of each of a plurality of shafts arranged in a circumferential shape to suck a component. In the rotary mounting head, a mechanism is provided to rotate each shaft around its central axis. For example, in Patent Document 1, a driving gear arranged on the inner side of the plurality of shafts meshes with a driven gear provided on each shaft, and each shaft rotates with the rotation of the driving gear. In particular, in Patent Document 1, in order to suppress the influence of the backlash of the gear on the rotation position of the shaft, a backlash-free gear is installed as a driven gear on each of the plurality of shafts.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2013-135151 Summary of the invention

[0006] Problems to be solved by the invention

[0007] However, in a configuration in which a backlash-free gear is provided for each of the plurality of shafts provided in the rotary mounting head, it is necessary to install the same number of backlash-free gears as the number of shafts, which results in a problem in that the cost of the rotary mounting head increases.

[0008] The present invention has been made in view of the above problems, and an object of the present invention is to provide a technology for suppressing backlash of gears and configuring a rotary mounting head at low cost that rotates a plurality of shafts by driving driven gears of the respective plurality of shafts.

[0009] Means for solving problems

[0010] The rotary mounting head of the present invention comprises: a scissor gear; and a plurality of shafts, each having a driven gear meshing with the scissor gear, and arranged along the periphery of the scissor gear.

[0011] In the present invention (rotary mounting head) thus constructed, the plurality of driven gears respectively provided on the plurality of shafts are arranged along the periphery of the scissor-type gears and mesh with the scissor-type gears. Therefore, by rotating the scissor-type gears, the plurality of shafts can be rotated. Moreover, since the rotation of the scissor-type gears is transmitted to the shafts by meshing the scissor-type gears with the plurality of driven gears, the backlash of the gears can be suppressed, and there is no need to provide a backlash-free gear on each of the plurality of shafts, and the cost of the rotary mounting head can be suppressed. In this way, the backlash of the gears can be suppressed and a rotary mounting head that rotates the plurality of shafts by driving the driven gears of the plurality of shafts can be constructed at a low cost.

[0012] In addition, the rotary mounting head may also be configured to further include a pressing mechanism for pressing the driven gears of each of the plurality of shafts toward the scissor gears. By pressing the plurality of driven gears of the plurality of shafts toward the scissor gears, each of the plurality of driven gears can be firmly meshed with the scissor gear. As a result, the plurality of shafts can be rotated while reliably suppressing the backlash of the gears.

[0013] In addition, the rotary mounting head can also be configured such that the pressing mechanism presses the driven gears of each of the multiple shafts toward the scissor gear by attracting the axial scissor gear side by magnetic force. In this structure, each of the multiple driven gears and the scissor gear can be firmly meshed by magnetic force. As a result, the backlash of the gears can be reliably suppressed and the multiple shafts can be rotated.

[0014] In addition, the rotary mounting head can also be configured such that the pressing mechanism has a magnet mounted on the scissor gear, and the shaft and the scissor gear are attracted to each other by the magnetic force generated by the magnet. In this structure, each of the multiple shafts and the scissor gear are attracted to each other by the magnetic force generated by the magnet mounted on the scissor gear, so that each of the multiple driven gears and the scissor gear can be firmly meshed. As a result, the multiple shafts can be rotated while the backlash of the gears is reliably suppressed.

[0015] In addition, the rotary mounting head can also be configured such that the pressing mechanism has an annular elastic member surrounding the multiple shafts, the elastic member contacts the multiple shafts from the outside in a state of being stretched longer than the natural length, and the driven gears of the multiple shafts are pressed toward the scissor-type gears by the elastic force generated by the elastic member. In this structure, the multiple driven gears and the scissor-type gears respectively provided by the multiple shafts can be firmly meshed by the elastic force generated by the annular elastic member contacting the multiple shafts from the outside. As a result, the backlash of the gears can be reliably suppressed, and each of the multiple shafts can be rotated.

[0016] In addition, the rotary mounting head may be configured to further include an annular toothed belt surrounding the driven gears of each of the plurality of shafts, the toothed belt meshing with the driven gears of each of the plurality of shafts from the outside. In this configuration, the rotation of the plurality of driven gears can be precisely linked by the toothed belt meshing with the plurality of driven gears from the outside, and the backlash of the gears can be suppressed, while each of the plurality of shafts can be rotated.

[0017] The component mounting machine of the present invention includes the above-mentioned rotary mounting head and a component supplying unit for supplying components, and the rotary mounting head mounts the components supplied by the component supplying unit on a substrate. Therefore, the backlash of the gear can be suppressed and the device can be constructed at low cost.

[0018] Effects of the Invention

[0019] According to the present invention, it is possible to configure a rotary mounting head that rotates a plurality of shafts by driving the driven gears of the respective plurality of shafts while suppressing the backlash of the gears at a low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a partial top view schematically showing the component mounting machine of the present invention.

[0021] Figure 2 It is a perspective view showing the mounting head according to the first embodiment.

[0022] Figure 3 It is shown Figure 2 Front view of the mounting head.

[0023] Figure 4 It is shown Figure 2 sectional view of the mounting head.

[0024] Figure 5 It is a top view schematically showing the mounting head of the second embodiment.

[0025] Figure 6 It is a perspective view showing a mounting head according to a third embodiment.

[0026] Figure 7 It is shown Figure 6 Front view of the mounting head.

[0027] Figure 8 It is a perspective view showing a mounting head according to a fourth embodiment.

[0028] Fig. 9 It is shown Figure 8 Front view of the mounting head.

[0029] Fig.10 yes Figure 8 A partial enlarged view of the mounting head. DETAILED DESCRIPTION

[0030] Figure 1 1 is a partial top view schematically showing a component mounting machine of the present invention. In this figure and the following figures, mutually orthogonal X, Y, and Z directions are appropriately shown. Here, the X and Y directions are horizontal directions, and the Z direction is a vertical direction. Figure 1 As shown, the component mounting machine 1 includes a pair of conveyors 12, 12 installed on a base 11. The component mounting machine 1 carries the substrate from the upstream side in the X direction (substrate conveying direction) to the mounting processing position ( Figure 1 The components are installed on the substrate B) and the substrate B on which the components have been installed is transported from the installation processing position to the downstream side in the X direction by the conveyor 12.

[0031] In the component mounting machine 1, a pair of Y-axis rails 21, 21 extending in the Y direction, a Y-axis ball screw 22 extending in the Y direction, and a Y-axis motor My for rotationally driving the Y-axis ball screw 22 are provided, and an X-axis rail 23 extending in the X direction is fixed to a nut of the Y-axis ball screw 22 in a state supported by the pair of Y-axis rails 21, 21 so as to be movable in the Y direction. An X-axis ball screw 24 extending in the X direction and an X-axis motor Mx for rotationally driving the X-axis ball screw 24 are mounted on the X-axis rail 23, and a head unit 3 is fixed to a nut of the X-axis ball screw 24 in a state supported by the X-axis rail 23 so as to be movable in the X direction. Therefore, the head unit 3 can be moved in the Y direction by rotating the Y-axis ball screw 22 using the Y-axis motor My, or the head unit 3 can be moved in the X direction by rotating the X-axis ball screw 24 using the X-axis motor Mx.

[0032] Two component supply units 28 are arranged in the X direction on both sides of the pair of conveyors 12, 12 in the Y direction. For each component supply unit 28, a plurality of tape feeders 281 are arranged in the X direction and assembled in a detachable manner, and each tape feeder 281 is provided with a reel wound with a tape for storing small pieces of components E (chip electronic components) such as integrated circuits, transistors, capacitors, etc. at predetermined intervals. And the tape feeder 281 intermittently feeds the tape to the head unit 3 side to supply the components E to the component supply position at the front end of the head unit 3 side.

[0033] The head unit 3 has a plurality of (four) mounting heads 4 arranged linearly in the X direction. Each mounting head 4 uses a suction nozzle N ( Figure 2) to adsorb and install the component E. That is, the mounting head 4 moves above the tape feeder 281 to adsorb the component E supplied by the tape feeder 281. Specifically, the mounting head 4 lowers the suction nozzle N until it contacts the component E, and then raises the suction nozzle N while generating negative pressure in the suction nozzle N, thereby adsorbing the component E. Next, the mounting head 4 moves above the substrate B at the mounting processing position and mounts the component E on the substrate B. Specifically, the mounting head 4 lowers the suction nozzle N until the component E contacts the substrate B, and then generates atmospheric pressure or positive pressure in the suction nozzle N, thereby mounting the component.

[0034] Figure 2 is a perspective view showing a mounting head according to the first embodiment, Figure 3 It is shown Figure 2 Front view of the mounting head, Figure 4 It is shown Figure 2 A cross-sectional view of the mounting head. Figure 2 to Figure 4 As shown, the mounting head 4 is a rotary mounting head in which 18 suction nozzles N are arranged in a circular shape. Figure 2 to Figure 4 The structure of the mounting head 4 will be described. It should be noted that the structure of the four mounting heads 4 is common, so one mounting head 4 will be described here.

[0035] In addition, in order to explain the rotation of the object, the expressions "revolution" and "rotation" are used appropriately below. Here, "revolution" means the movement of the object rotating around a rotation axis that does not pass through the object, and "rotation" means the movement of the object rotating around a rotation axis that passes through the object.

[0036] The mounting head 4 has a main rod 41 extending parallel to the Z direction and a shaft holder 42 supported at the lower end of the main rod 41. The shaft holder 42 is supported in a manner that allows it to rotate in the revolution direction Da centered around the revolution axis Ca (imaginary axis) passing through the center of the main rod 41 and parallel to the Z direction, and the shaft holder 42 receives the driving force of the revolution motor (not shown) and rotates around the revolution axis Ca. The shaft holder 42 has 18 shaft insertion holes 421 that are spaced at equal angles θi (20 degrees) and arranged in a circle centered around the revolution axis Ca. The shaft insertion holes 421 penetrate in the Z direction, and the nozzle shaft 43 is supported by the shaft holder 42 in a state of being inserted into the shaft insertion holes 421. In this way, the 18 nozzle shafts 43 supported by the shaft holder 42 are spaced at equal angles θi (20 degrees) and arranged in a circle centered around the revolution axis Ca. Therefore, when the shaft holder 42 rotates around the revolution axis Ca, the 18 nozzle shafts 43 revolve around the revolution axis Ca as a whole. Figure 2 In FIG. 1 , only a part (two) of the 18 nozzle shafts 43 are shown.

[0037] Each nozzle shaft 43 has a lifting rod 431 extending in the Z direction and a spline shaft 432 mounted on the shaft retainer 42. The spline shaft 432 is mounted on the shaft retainer 42 in a state of being inserted into the shaft insertion hole 421. The spline shaft 432 is provided with a rod insertion hole 432a that penetrates in the Z direction, and the lifting rod 431 is inserted into the rod insertion hole 432a. In addition, the nozzle shaft 43 has a coil spring 433 externally embedded in the lifting rod 431, and the coil spring 433 applies force to the lifting rod 431 upward relative to the spline shaft 432. In this way, the lifting rod 431 is supported by the spline shaft 432 and the coil spring 433 in a manner that allows it to be lifted and lowered. The lower end of the lifting rod 431 is located below the shaft retainer 42, and a suction nozzle N is mounted on the lower end.

[0038] The nozzle shaft 43 is supported by the shaft holder 42 in such a manner that it can rotate around the rotation axis Cb (imaginary axis) that is consistent with its center line. Specifically, the spline shaft 432 of the nozzle shaft 43 can rotate relative to the shaft holder 42 around the rotation axis Cb. The spline shaft 432 constrains the lifting rod 431 in the rotation direction around the rotation axis Cb, and the spline shaft 432 and the lifting rod 431 rotate integrally around the rotation axis Cb. The spline shaft 432 has a driven gear 432b centered on the rotation axis Cb above the shaft holder 42, and rotates along with the lifting rod 431 according to the torque applied to the driven gear 432b.

[0039] In this structure, if torque is applied to each driven gear 432b, the multiple nozzle shafts 43 rotate around their respective rotation axes Cb. In contrast, the mounting head 4 has a driving gear 44 that drives and rotates the multiple nozzle shafts 43. The driving gear 44 is arranged above the shaft retainer 42 around the revolution axis Ca. The driving gear 44 is externally embedded in the main rod 41 via a bearing 45, and rotates around the revolution axis Ca if it receives the driving force of the rotation axis motor (not shown). In contrast, the multiple driven gears 432b respectively provided on the multiple nozzle shafts 43 are arranged in a circular shape along the periphery of the driving gear 44, and mesh with the driving gear 44 from the outside. Therefore, by the rotation of the driving gear 44, the multiple driven gears 432b are driven, and the multiple nozzle shafts 43 rotate around their respective rotation axes Cb.

[0040] In particular, the driving gear 44 is a scissor gear. The scissor gear has two overlapping gears and a spring that applies force to the two gears in the circumferential direction. If the two gears receive an external force, they will displace each other in the circumferential direction against the force of the spring. Therefore, the driving gear 44 and the driven gear 432b are meshed in a state where the backlash between the driving gear 44 and the driven gear 432b is suppressed. Therefore, the rotation of the driving gear 44 can be accurately transmitted to the driven gear 432b to cause the nozzle shaft 43 to rotate.

[0041] It should be noted that, in this example, the two driving gears 44 are arranged at different heights. These driving gears 44 are fixed to each other and rotate as a whole. In addition, the driven gear 432b meshing with the upper driving gear 44 of the two driving gears 44 and the driven gear 432b meshing with the lower driving gear 44 are arranged alternately. In this way, the heights of the driven gears 432b of the two adjacent nozzle shafts 43 are staggered up and down.

[0042] Furthermore, the mounting head 4 has a magnet 46 disposed above the driving gear 44. The magnet 46 has a disk shape centered on the revolution axis Ca, and is composed of a lower disk 461 having a magnetic pole of one of the N pole and the S pole, and an upper disk 462 having a magnetic pole of the other of the N pole and the S pole. In other words, the magnet 46 has a lower disk 461 and an upper disk 462 having magnetic poles different from each other, and the lower disk 461 and the upper disk 462 are stacked. The lower end of the magnet 46 is located below the upper end of the nozzle shaft 43, and on the other hand, the upper end of the magnet 46 is located above the lower end of the nozzle shaft 43, and the magnet 46 and the spline shaft 432 are partially opposed to each other in the horizontal direction.

[0043] In contrast, the nozzle shaft 43 (at least the lifting rod 431 and the spline shaft 432) includes a soft magnetic material (e.g., iron) that is attracted by the magnet 46 through magnetic force. Therefore, a magnetic force toward the magnet 46 acts on each of the plurality of nozzle shafts 43 arranged to surround the magnet 46. As a result, each of the plurality of driven gears 432b is pressed against the driving gear 44.

[0044] In the mounting head 4 of the first embodiment described above, the plurality of driven gears 432b respectively provided to the plurality of nozzle shafts 43 are arranged along the periphery of the driving gear 44 and mesh with the driving gear 44. Therefore, by rotating the driving gear 44, the plurality of shafts can be rotated. Moreover, since the rotation of the driving gear 44 is transmitted to the nozzle shaft 43 by meshing the driving gear 44 as a scissor-type gear with each of the plurality of driven gears 432b, the backlash between the driving gear 44 and the driven gear 432b can be suppressed, and there is no need to provide each of the plurality of nozzle shafts 43 with a backlash-free gear (scissor-type gear), so the cost of the mounting head 4 can be suppressed. In this way, the backlash between the driven gear 432b and the driving gear 44 can be suppressed, and the mounting head 4 that rotates the plurality of nozzle shafts 43 by driving the driven gears 432b of each of the plurality of nozzle shafts 43 can be constructed at a low cost.

[0045] In addition, a magnet 46 (pressing mechanism) is provided for pressing the driven gears 432b of each of the plurality of nozzle shafts 43 toward the driving gear 44 (scissor gear). By pressing the plurality of driven gears 432b toward the driving gear 44 in this way, each of the plurality of driven gears 432b can be firmly meshed with the driving gear 44. As a result, the backlash between the driven gears 432b and the driving gear 44 can be reliably suppressed, and the plurality of nozzle shafts 43 can be rotated.

[0046] In addition, the nozzle shaft 43 is attracted to the driving gear 44 by the magnetic force of the magnet 46, thereby pressing the plurality of driven gears 432b to the driving gear 44. In this structure, the magnetic force can be used to firmly mesh each of the plurality of driven gears 432b with the driving gear 44. As a result, the plurality of nozzle shafts 43 can be rotated while reliably suppressing the backlash between the driven gear 432b and the driving gear 44.

[0047] Figure 5 Schematically shows a top view of the mounting head of the second embodiment. The difference between the first embodiment and the second embodiment lies in the pressing mechanism that presses the nozzle shaft 43 toward the drive gear 44, and the other structures are common to the first embodiment and the second embodiment. Therefore, the following description will focus on these differences, and the common structures will be marked with corresponding numbers and the description will be omitted. However, by having a common structure, of course, the same effect is achieved. This is also the same for each embodiment described after the second embodiment.

[0048] The mounting head 4 of the second embodiment has a magnet 47 instead of the magnet 46. Specifically, 18 magnets 47 are mounted on the upper surface of the drive gear 44. It should be noted that the configuration position of the magnet 47 is not limited to the upper surface of the drive gear 44. Therefore, the magnet 47 can also be mounted on the lower surface of the drive gear 44, and can also be embedded in the inside of the drive gear 44. It should be noted that the configuration of the magnet 47 relative to the above-mentioned two drive gears 44 is common, and therefore, it is not particularly distinguished here.

[0049] The number of magnets 47 is the same as the number of all nozzle shafts 43 provided by the mounting head 4, and 18 magnets 47 are arranged in a circle centered on the revolution axis Ca at equal angles θi (20 degrees). In this way, the magnets 47 are arranged in a circle inside the nozzle shafts 43 arranged in a circle. In the N pole and the S pole, the end of the inner side (the revolution axis Ca side) of the magnet 47 has one magnetic pole, and the end of the outer side (the opposite side of the revolution axis Ca) of the magnet 47 has the other magnetic pole.

[0050] In addition, the driving gear 44 includes a soft magnetic material (e.g., iron) and is magnetized by the magnetic force of the magnet 47. In contrast, the nozzle shaft 43 (at least the driven gear 432b) also includes a soft magnetic material (e.g., iron). Therefore, a magnetic force acts toward the driving gear 44 on each of the multiple nozzle shafts 43 arranged in a manner surrounding the driving gear 44. As a result, each of the multiple driven gears 432b is pressed toward the driving gear 44.

[0051] In the second embodiment described above, the mounting head 4 also has a scissor gear as the driving gear 44. Therefore, it is possible to suppress the backlash between the driven gear 432b and the driving gear 44 and to configure the mounting head 4 that rotates the plurality of nozzle shafts 43 by driving the driven gears 432b of the plurality of nozzle shafts 43 at a low cost.

[0052] In addition, in the second embodiment, a magnet 47 is installed on the driving gear 44. Therefore, by the magnetic force generated by the magnet 47 installed on the driving gear 44, each of the plurality of nozzle shafts 43 (driven gears 432b) and the driving gear 44 can be attracted to each other, and each of the plurality of driven gears 432b can be firmly meshed with the driving gear 44. As a result, the backlash between the driven gear 432b and the driving gear 44 can be reliably suppressed, and the plurality of nozzle shafts 43 can be rotated.

[0053] Figure 6 is a perspective view showing a mounting head according to a third embodiment, Figure 7 It is shown Figure 6 In the third embodiment, unlike the first embodiment, the mounting head 4 does not include the magnet 46, and no magnetic force acts on the nozzle shaft 43 toward the drive gear 44. On the other hand, the mounting head 4 of the third embodiment includes an annular elastic ring 48.

[0054] The elastic ring 48 is, for example, a spring coil made of silicone rubber or metal, and has elasticity. That is, the elastic ring 48 generates an elastic force corresponding to the length extended from the natural length. In the mounting head 4, the elastic ring 48 is externally embedded in the plurality of nozzle shafts 43 in a state extended from the natural length, and contacts each nozzle shaft 43 from the outside (the opposite side of the revolution axis Ca). Specifically, the elastic ring 48 contacts 18 spline shafts 432, and applies an elastic force toward the revolution axis Ca to each spline shaft 432.

[0055] It should be noted that, in this example, the elastic ring 48 contacts the spline shaft 432 at a position above the driven gear 432b. However, the position where the elastic ring 48 contacts the spline shaft 432 is not limited to this, and may also be a position below the driven gear 432b. Furthermore, the elastic ring 48 may also be configured in a manner that it contacts the nozzle shaft 43 at a position other than the spline shaft 432.

[0056] In the third embodiment described above, the mounting head 4 also has a scissor gear as the driving gear 44. Therefore, it is possible to suppress the backlash between the driven gear 432b and the driving gear 44 and to configure the mounting head 4 that rotates the plurality of nozzle shafts 43 by driving the driven gears 432b of the plurality of nozzle shafts 43 at a low cost.

[0057] In addition, in the third embodiment, an annular elastic ring 48 (elastic member) is provided surrounding the plurality of nozzle shafts 43, and the elastic ring 48 contacts the plurality of nozzle shafts 43 from the outside in a state of being stretched longer than the natural length. As a result, the driven gears 432b of the plurality of nozzle shafts 43 are pressed toward the driving gear 44 by the elastic force generated by the elastic ring 48. In this structure, the plurality of driven gears 432b and the driving gear 44 respectively provided by the plurality of nozzle shafts 43 can be firmly meshed by the elastic force generated by the elastic ring 48. As a result, the backlash between the driven gear 432b and the driving gear 44 can be reliably suppressed, and each of the plurality of nozzle shafts 43 can be rotated.

[0058] Figure 8 is a perspective view showing a mounting head according to a fourth embodiment, Fig. 9 It is shown Figure 8 Front view of the mounting head, Fig.10 yes Figure 8 A partial enlarged view of the mounting head. In the fourth embodiment, unlike the first embodiment, the mounting head 4 does not have a magnet 46, and no magnetic force acts on the nozzle shaft 43 toward the drive gear 44. On the other hand, the mounting head 4 of the fourth embodiment has an annular toothed belt 49. The toothed belt 49 is externally embedded in 18 driven gears 432b and meshes with each driven gear 432b from the outside.

[0059] In the fourth embodiment described above, the mounting head 4 also has a scissor gear as the driving gear 44. Therefore, it is possible to suppress the backlash between the driven gear 432b and the driving gear 44 and to configure the mounting head 4 that rotates the plurality of nozzle shafts 43 by driving the driven gears 432b of the plurality of nozzle shafts 43 at a low cost.

[0060] In addition, in the fourth embodiment, an annular toothed belt 49 surrounding the plurality of driven gears 432b is provided, and the toothed belt 49 meshes with the plurality of driven gears 432b from the outside. In this structure, the rotation of the plurality of driven gears 432b can be precisely linked by the toothed belt 49, and the backlash between the driven gears 432b and the driving gear 44 can be suppressed, and each of the plurality of nozzle shafts 43 can be rotated.

[0061] As described above, in the present embodiment, the component mounting machine 1 is equivalent to an example of a “component mounting machine” of the present invention, the component supply section 28 is equivalent to an example of a “component supply section” of the present invention, the mounting head 4 is equivalent to an example of a “rotary mounting head” of the present invention, the nozzle shaft 43 is equivalent to an example of an “axis” of the present invention, 9 nozzle shafts 43, which are half of the 18 nozzle shafts 43 of the mounting head 4, are equivalent to the “multiple axes” of the present invention, the driven gear 432b is equivalent to an example of a “driven gear” of the present invention, the driving gear 44 is equivalent to an example of a “scissors-type gear” of the present invention, the magnet 46 is equivalent to an example of a “pressing mechanism” and a “magnet” of the present invention, the magnet 47 is equivalent to an example of a “pressing mechanism” and a “magnet” of the present invention, the elastic ring 48 is equivalent to an example of an “elastic member” of the present invention, and the toothed belt 49 is equivalent to an example of a “toothed belt” of the present invention.

[0062] It should be noted that the present invention is not limited to the above-mentioned embodiment, and various changes can be made to the above-mentioned embodiment as long as they do not deviate from the main purpose. For example, the first to fourth embodiments described above can be appropriately combined. For example, in the mounting head 4 of the first embodiment, both the magnet 46 and the magnet 47 can be provided, and an elastic ring 48 can be added. In addition, the mounting head 4 of the first embodiment, the second embodiment, or the third embodiment can also be provided with a toothed belt 49.

[0063] In the first embodiment, the orientation and arrangement of the magnets 46 may be changed as appropriate, and in the second embodiment, the number and arrangement of the magnets 47 may be changed as appropriate.

[0064] In addition, the arrangement position of the driving gear 44 can be changed, the number of nozzle shafts 43 can be changed, and various structures of the mounting head 4 can be changed.

[0065] The mounting head 4 does not necessarily need to include the pressing mechanism (magnet 46, magnet 47 and elastic ring 48) for pressing the driven gear 432b toward the driving gear 44 in the first to third embodiments, and does not necessarily need to include the toothed belt 49 in the fourth embodiment.

[0066] In addition, the number of the driving gears 44 is not limited to 2, and may be 1. In the case of a single driving gear 44, the above-mentioned embodiments may be modified so that the driven gears 432b of all (18) nozzle shafts 43 of the mounting head 4 are in contact with the single driving gear 44 from the outside and mesh with it.

[0067] Description of symbols

[0068] 1…component mounting machine;

[0069] 28…parts supply department;

[0070] 4…Mounting head (rotating mounting head);

[0071] 43… nozzle shaft (shaft);

[0072] 432b…driven gear;

[0073] 44…driving gear (scissor gear);

[0074] 46…magnet (pressing mechanism);

[0075] 47…magnet (pressing mechanism);

[0076] 48 ... elastic ring (elastic member);

[0077] 49…Toothed belt.

Claims

1. A rotary mounting head, comprising: Scissor gears; and A plurality of shafts, each having a driven gear meshing with the scissor gear, are arranged along the periphery of the scissor gear, A pressing mechanism is further provided for pressing the driven gears of the respective plurality of shafts toward the scissor gears.

2. The rotary mounting head according to claim 1, The pressing mechanism presses the driven gear of each of the plurality of shafts toward the scissors gear by attracting the shaft toward the scissors gear using a magnetic force.

3. The rotary mounting head according to claim 2, The pressing mechanism includes a magnet attached to the scissor gear, and the shaft and the scissor gear are attracted to each other by a magnetic force generated by the magnet.

4. The rotary mounting head according to claim 1, The pressing mechanism includes an annular elastic member surrounding the plurality of shafts. The elastic member contacts the plurality of shafts from the outside in a state where the elastic member is extended beyond its natural length. The driven gears of the respective plurality of shafts are pressed toward the scissors gear by the elastic force generated by the elastic member.

5. A rotary mounting head, comprising: Scissor gears; and A plurality of shafts, each having a driven gear meshing with the scissor gear, are arranged along the periphery of the scissor gear, further comprising an endless toothed belt surrounding the driven gears of the respective shafts, The toothed belt meshes with the driven gears of each of the plurality of shafts from the outside.

6. A component mounting machine comprising: The rotary mounting head according to any one of claims 1 to 5; and Component supply department, supply components, The rotary mounting head mounts the component supplied by the component supply unit on a substrate.

Images