Component suction nozzle and component mounting device

Abstract

To provide a component suction nozzle and a component mounting device having the same that are easy to assemble and disassemble, require no advanced skills, and can improve maintenance workability.SOLUTION: A nozzle 16 includes: a nozzle shaft 51 which has a suction port 16K for sucking a component at the lower end and a projection 64 protruding outward from the side surface; a shaft holding part 52 which has an insertion hole 73 extending through from an upper surface 71 to a lower surface 72 and a guide groove 74 that receives the projection 64 of the nozzle shaft 51 inserted from above the insertion hole 73 to guide vertical movement of the nozzle shaft 51; and a coming-out prevention member 53 which is attached to the shaft holding part 52 to prevent the projection 64 of the nozzle shaft 51 inserted into the insertion hole 73 from coming out of the upper end of the guide groove 74.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a component suction nozzle attached to a mounting head of a component mounting apparatus for sucking components and a component mounting apparatus including the component suction nozzle.

Background Art

[0002] Conventionally, a component mounting apparatus is known that sucks components supplied from a component supply unit by a mounting head and mounts them on a substrate. The mounting head includes a component suction nozzle (hereinafter referred to as a nozzle) via a nozzle holder at the lower end of an elevating shaft that can move up and down, and generates a vacuum suction force at a suction port at the lower end of the nozzle to suck the component.

[0003] In addition to the nozzle shaft, the nozzle includes a member (shaft holding portion) that holds the nozzle shaft so as to be movable in the vertical direction, and a pin member that guides the movement of the nozzle shaft with respect to the shaft holding portion while preventing the nozzle shaft from coming out of the shaft holding portion. The pin member is configured to move in a long hole provided to extend in the vertical direction on the other while being attached to one of the nozzle shaft and the shaft member (for example, Patent Document 1 below).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the component suction nozzle having the above-described configuration, in the assembly work and disassembly work, the operator had to attach and detach the pin member, which is a minute component, through the long hole formed in the shaft holding portion. To perform these operations smoothly, a high level of skill was required, and there was a problem in that it was difficult for inexperienced operators and the workability was poor.

[0006] Therefore, an object of the present invention is to provide a component suction nozzle that is easy to assemble and disassemble, does not require a high level of skill, and can improve maintenance workability, and a component mounting apparatus including the same.

Means for Solving the Problems

[0007] The component suction nozzle of the present invention includes a nozzle shaft having a suction port for sucking a component at the lower end and a protrusion protruding outward from the side surface, and an insertion hole that penetrates from the upper surface to the lower surface and through which the nozzle shaft is inserted from above, and a shaft holding portion having a guide groove that receives the protrusion of the nozzle shaft inserted through the insertion hole from the upper end side and guides the vertical movement of the nozzle shaft. The component suction nozzle further includes a retaining member attached to the shaft holding portion for preventing the protrusion of the nozzle shaft inserted through the insertion hole from coming out of the upper end of the guide groove.

[0008] The component mounting apparatus of the present invention is a component mounting apparatus that mounts a component on a substrate using a component suction nozzle held by a nozzle holder. The component suction nozzle includes a nozzle shaft having a suction port for sucking a component at the lower end and a protrusion protruding outward from the side surface, and an insertion hole that penetrates from the upper surface to the lower surface and a guide groove that receives the protrusion of the nozzle shaft inserted from above the insertion hole and guides the vertical movement of the nozzle shaft. The component suction nozzle further includes a retaining member attached to the shaft holding portion for preventing the protrusion of the nozzle shaft inserted through the insertion hole from coming out of the upper end of the guide groove.

Effects of the Invention

[0009] According to the present invention, the component suction nozzle can be easily assembled and disassembled, eliminating the need for advanced skills and improving the maintainability.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a component mounting apparatus 1 according to an embodiment of the present invention. The component mounting apparatus 1 is an apparatus that repeatedly performs a component mounting operation of mounting a component BH on a substrate KB sent from the upstream process side and discharging it to the downstream process side.

[0012] The component mounting device 1 includes a pair of conveyors 12 that convey the substrate KB onto the base 11 and position it at a predetermined position, and a tape feeder 13 as a component supply device that supplies the component BH to the component extraction position 13K by pulling out and conveying the component tape BT in which the components BH are stored from the reel RL. The mounting head 15 is moved in the horizontal plane direction by a head movement mechanism 14 provided on the base 11. The head movement mechanism 14 is composed of, for example, an XY table mechanism, and the mounting head 15 is provided with a plurality of component suction nozzles (hereinafter referred to as nozzles 16) extending downward. The mounting head 15 can generate a vacuum suction force at the lower end of each nozzle 16.

[0013] The mounting head 15 is moved by the head movement mechanism 14, adsorbs the component BH supplied by the tape feeder 13, and then repeatedly executes a mounting cycle of moving above the substrate KB and mounting the component BH on the substrate KB. When all the components BH to be mounted on the substrate KB are mounted by the mounting head 15 repeatedly executing the mounting cycle, the conveyor 12 carries out the substrate KB to the downstream process side.

[0014] In the present embodiment, the configuration of the nozzles 16 provided in the mounting head 15 is characterized, and the description thereof will be given below. As shown in FIG. 2, the mounting head 15 is provided with a plurality of elevating shafts 21 extending downward. Inside the mounting head 15, a plurality of shaft elevating portions 15M corresponding to the plurality of elevating shafts 21 are provided, and each elevating shaft 21 is elevated with respect to the mounting head 15 by the corresponding shaft elevating portion 15M. As shown in FIG. 3, a vacuum pipeline (elevating shaft internal vacuum pipeline 21K) extending in the vertical direction is provided in the elevating shaft 21. A vacuum pressure is supplied to the elevating shaft internal vacuum pipeline 21K from a vacuum source (not shown).

[0015] In FIG. 3, the lower part of each lifting shaft 21 has a small-diameter portion 21D with a slightly smaller outer diameter, and a nozzle holder 22 is attached to this small-diameter portion 21D. The nozzle holder 22 includes a hollow cylindrical holder main body portion 31 that extends in the vertical direction as a whole. The upper part 31a of the holder main body portion 31 is externally fitted to the lower end of the lifting shaft 21, so that the nozzle holder 22 is connected to the lifting shaft 21.

[0016] In FIG. 3, the holder main body portion 31 has an internal space 32 that penetrates vertically inside. This internal space 32 communicates with the vacuum pipeline 21K inside the lifting shaft. The internal space 32 includes an upper internal space upper portion 32a and a lower internal space lower portion 32b that is located below the upper internal space upper portion 32a and has a larger inner diameter than the upper internal space upper portion 32a (FIG. 3).

[0017] In FIG. 3, three spherical body holding holes 33 are formed in the lower part 31b of the holder main body portion 31 at intervals of 120 degrees with respect to the holder central axis JX1 extending in the vertical direction. These spherical body holding holes 33 are through holes that penetrate the holder main body portion 31 in its thickness direction. A spherical body 34 as an engaging portion is housed in each of the spherical body holding holes 33, and a part of each spherical body 34 penetrates from the spherical body holding hole 33 and is in a state of being located inside the internal space 32 (specifically, the lower internal space lower portion 32b) of the holder main body portion 31.

[0018] In FIG. 3, a spherical body holding band 35 is attached to the lower part 31b of the holder main body portion 31 with elastic tension so as to surround its outer circumference. The spherical body holding band 35 presses each of the three spherical bodies 34 into the corresponding spherical body holding hole 33 to prevent them from falling out of the spherical body holding hole 33, and holds each spherical body 34 so that it can freely roll inside the corresponding spherical body holding hole 33. Note that in FIG. 3, two of the three spherical body holding holes 33 are shown, and one of the three spherical bodies 34 is shown.

[0019] In FIG. 3, at the lowermost part of the lower portion 31b of the holder main body portion 31, a large outer diameter portion 36 having a slightly larger outer diameter than its upper portion is formed. The above-described spherical body holding band 35 is in contact with the step surface 36M on the upper surface of the large outer diameter portion 36 at its lower edge. Thereby, the spherical body holding band 35 is positioned with respect to the holder main body portion 31, and is prevented from falling off (coming off) from the outer peripheral surface of the holder main body portion 31. A position adjusting projection 37 protruding downward is formed on a part of the lower surface of the large outer diameter portion 36.

[0020] In FIG. 3, in the vertical intermediate portion (the lower part of the upper part 32a of the internal space) of the internal space 32 of the holder main body portion 31, a hollow multi-stage cylindrical pusher 41 is provided so as to be movable vertically. A ring-shaped pusher stopper 42 is attached to the cylindrical inner peripheral surface of the holder main body portion 31 at a position below the pusher 41 in the internal space 32 (at the boundary between the upper part 32a and the lower part 32b of the internal space), preventing the pusher 41 from coming out downward from the internal space 32 (the upper part 32a of the internal space).

[0021] In the region above the pusher 41 in the upper part 32a of the internal space, a biasing spring 43 is disposed. The biasing spring 43 has its upper end in contact with the lower edge of the small diameter portion 21D of the lifting shaft 21, and its lower end in contact with the bottom surface 41B of the recess formed in the upper part of the pusher 41. For this reason, the pusher 41 is biased downward by the biasing spring 43, and in a state where no upward pressing force acts on the pusher 41, the pusher 41 is in contact with the pusher stopper 42 from above (FIG. 3).

[0022] The pusher 41 has an extending portion 41E extending downward, and the extending portion 41E extends through the pusher stopper 42 downward. Inside the pusher 41, a pipe line (pusher internal pipe line 41K) extending through in the vertical direction is provided. The pusher internal pipe line 41K communicates the upper part 32a and the lower part 32b of the internal space.

[0023] In FIGS. 4 and 5, the nozzle 16 includes a nozzle shaft 51, a shaft holding portion 52, and a retaining member 53. The nozzle shaft 51 is a hollow cylindrical member extending in the vertical direction as a whole, and has a suction passage 61 inside. The nozzle shaft 51 has a nozzle tip 62 at its lower end, and the lower surface of the nozzle tip 62 is a contact surface 62M that contacts the upper surface of the component BH.

[0024] In FIG. 4, a nozzle tip internal suction passage 63 extending vertically through the nozzle tip 62 is formed. The upper end of the nozzle tip internal suction passage 63 communicates with the suction passage 61, and the lower end of the nozzle tip internal suction passage 63 opens to the contact surface 62M to form a suction port 16K in the nozzle 16. A protrusion 64 protruding outward is provided on the side surface of the nozzle shaft 51. This protrusion 64 may be integrally formed with the nozzle shaft 51, or a separate member from the nozzle shaft 51 may be attached to the nozzle shaft 51. In the present embodiment, the protrusion 64 is formed by a pin press-fitted into the nozzle shaft 51.

[0025] In FIG. 3, the shaft holding portion 52 has a hollow cylindrical shape extending in the vertical direction as a whole. The shaft holding portion 52 has an insertion hole 73 extending through from the upper surface 71 to the lower surface 72, and the nozzle shaft 51 is inserted therethrough from above. As shown in FIGS. 4 and 5, a flange portion 51T having a slightly larger outer diameter is provided at the upper end portion of the nozzle shaft 51. The nozzle shaft 51 inserted through the insertion hole 73 has its lowermost position in the vertical direction with respect to the shaft holding portion 52 defined by the flange portion 51T abutting against the upper surface 71 of the shaft holding portion 52.

[0026] In FIGS. 4 and 5, a guide groove 74, which is a groove extending in the vertical direction and connected to the insertion hole 73, is provided in a part of the side surface of the shaft holding portion 52. This guide groove 74 opens to the upper surface 71 of the shaft holding portion 52, and when the nozzle shaft 51 is inserted into the insertion hole 73, the above-described protrusion 64 provided on the side surface of the nozzle shaft 51 can be received. The nozzle shaft 51 with the protrusion 64 received in the guide groove 74 is guided by the insertion hole 73 in which the protrusion 64 extends in the vertical direction, so that the rotation of the nozzle shaft 51 about the nozzle central axis JX2 (FIG. 4) extending in the vertical direction is restricted.

[0027] The retaining member 53 is formed of an annular or "C"-shaped member. Here, an O-ring is used as the retaining member 53 (FIG. 5). As shown in FIGS. 4 and 5, an annular groove 75 is provided in the upper part of the shaft holding portion 52, and the retaining member 53 is fitted into the annular groove 75, whereby the retaining member 53 is fixed to the shaft holding portion 52. By fitting the retaining member 53 into the annular groove 75, a part of the retaining member 53 extends intersecting the longitudinal direction of the guide groove 74, and the protrusion 64 of the nozzle shaft 51 inserted into the insertion hole 73 is prevented from coming out of the upper end of the guide groove 74.

[0028] Thus, in this embodiment, the retaining member 53 is attached to the shaft holding portion 52 and has a function of preventing the protrusion 64 of the nozzle shaft 51 inserted into the insertion hole 73 from coming out of the upper end of the guide groove 74.

[0029] In FIGS. 4 and 5, on the side surface of the shaft holding portion 52, three spherical body fitting portions 81 are provided as concave portions located at intervals of 120 degrees around the nozzle central axis JX2 extending in the vertical direction. Among the side surfaces of the shaft holding portion 52, the portion including the upper edges of the three spherical body fitting portions 81 is an overhanging portion 82 that protrudes radially outward of the shaft holding portion 52, and the upper edge and the lower edge of the overhanging portion 82 are cam surfaces (upper cam surface 82a and lower cam surface 82b) each formed in a gentle arc shape or a gentle inclined shape. A flange portion 83 that protrudes laterally is provided at the lower part of the shaft holding portion 52, and a notch 83K is formed in a part of the flange portion 83.

[0030] When assembling the nozzle 16, first, a protrusion 64 is formed on the side surface of the nozzle shaft 51. Specifically, a pin to be the protrusion 64 is press-fitted into the nozzle shaft 51 by a tool. Next, the nozzle shaft 51 is inserted through the insertion hole 73 from above the shaft holding portion 52 to insert the nozzle shaft 51 into the shaft holding portion 52. At this time, the protrusion 64 protruding from the side surface of the nozzle shaft 51 is received in the guide groove 74 formed in the shaft holding portion 52. Then, when the nozzle shaft 51 is deeply inserted into the shaft holding portion 52 in this way, a retaining member 53 is fitted into the annular groove 75 formed in the upper part of the shaft holding portion 52. Thereby, the nozzle shaft 51 is in a state where it is prevented from falling off (coming off) from the shaft holding portion 52 (FIG. 4), and the assembly of the nozzle 16 is completed. When it is necessary to disassemble the nozzle 16 for maintenance or the like, it is only necessary to remove the retaining member 53 and pull out the nozzle shaft 51 from the shaft holding portion 52. Thus, the nozzle 16 of the present embodiment can be easily assembled and disassembled.

[0031] To attach the nozzle 16 assembled in this way to the nozzle holder 22, the operator OP pinches the flange portion 83 of the nozzle 16 with a finger and inserts the upper part of the nozzle 16 downward into the lower part 32b of the internal space of the nozzle holder 22 (holder main body portion 31). At this time, the operator OP adjusts the rotational position of the nozzle 16 around the holder central axis JX1 with respect to the holder main body portion 31 so that the positioning projection 37 formed on the large outer diameter portion 36 of the holder main body portion 31 enters the notch 83K formed in the flange portion 83 of the shaft holding portion 52, and then inserts the nozzle 16 into the lower part 32b of the internal space.

[0032] When the upper part of the nozzle 16 is inserted into the lower part 32b of the internal space of the holder main body portion 31, the upper cam surface 82a formed on the side surface of the shaft holding portion 52 of the nozzle 16 abuts against the three spheres 34 protruding and positioned in the lower part 32b of the internal space of the holder main body portion 31. After the upper cam surface 82a of the nozzle 16 abuts against the three spheres 34, when the nozzle 16 is further pushed upward, the three spheres 34 are respectively pressed in a direction away from the holder central axis JX1 by the upper cam surface 82a and move to the outside of the holder main body portion 31 against the elastic force of the sphere holding band 35. As a result, the distance between adjacent ones of the three spheres 34 widens, and when each of the three spheres 34 has overcome the overhanging portion 82, the three spheres 34 respectively move in a direction approaching the holder central axis JX1 by the elastic force of the sphere holding band 35 and fit into the corresponding sphere fitting portions 81. Thereby, the nozzle 16 is held in the nozzle holder 22 (Fig. 6).

[0033] Thus, in this embodiment, the plurality (here, three) of sphere holding holes 33, the plurality (three) of spheres 34 held in these sphere holding holes 33, and the sphere holding band 35 that biases and holds these plurality of spheres 34 in the corresponding sphere holding holes 33 function as a clamping mechanism (ball plunger) that fits into and holds the sphere fitting portion 81, which is a concave portion formed on the side surface of the shaft holding portion 52 of the nozzle 16, when the nozzle 16 is inserted into the nozzle holder 22 (holder holding portion 31).

[0034] Before the nozzle 16 is held by the nozzle holder 22 as described above, the upper end surface of the nozzle shaft 51 abuts against the lower surface of the extending portion 41E of the pusher 41 in the nozzle holder 22. As the nozzle 16 is inserted into the lower part 32b of the internal space of the nozzle holder 22 (holder holding portion 31), the pusher 41 is pushed upward against the biasing force of the biasing spring 43. Therefore, in the state where the nozzle 16 is held by the nozzle holder 22 (Fig. 6), the nozzle 16 is biased downward by the biasing spring 43 via the pusher 41. Note that the operation of attaching the nozzle 16 to the nozzle holder 22 may be automatically performed by the component mounting apparatus 1.

[0035] When the component mounting apparatus 1 operates the mounting head 15 to suck the component BH supplied by the tape feeder 13 by the nozzle 16, the contact surface 62M of the nozzle tip 62 is brought into contact with the upper surface of the component BH. At this time, the nozzle 16 slightly presses the component BH from above. In the present embodiment, when the component BH is pressed by the contact surface 62M of the nozzle tip 62 in this way, the nozzle shaft 51 is pushed upward from the component BH side as a reaction force of the pressing force, and the biasing spring 43 is compressed via the pusher 41. As a result, the impact received by the nozzle shaft 51 from the component BH side at the moment when the contact surface 62M of the nozzle tip 62 comes into contact with the component BH is absorbed by the biasing spring 43 via the pusher 41, and the impact received by the component BH from the nozzle tip 62 (nozzle shaft 51) side is alleviated.

[0036] As described above, in the present embodiment, the pusher 41 and the biasing spring 43 function as a buffer portion 90 (Fig. 6) that biases the nozzle shaft 51 downward with respect to the shaft holding portion 52 in a state where the sphere 34 as an engaging portion is engaged (inserted) with the sphere fitting portion 81 provided in the shaft holding portion 52, and alleviates the impact received by the nozzle shaft 51 upward.

[0037] When the nozzle 16 is attached to the nozzle holder 22 as described above, a suction passage 61 connected to the suction port 16K at the lower end of the nozzle shaft 51 is connected to the vacuum passage 21K in the lifting shaft via the inner pipe 41K in the pusher and the upper part 32a of the inner space of the nozzle holder 22 (Fig. 6). Therefore, when a vacuum pressure is supplied from the aforementioned vacuum source (not shown), a suction force is generated at the suction port 16K at the lower end of the nozzle shaft 51, and it becomes possible to adsorb the component BH supplied by the tape feeder 13 by the nozzle shaft 51.

[0038] As described above, the nozzle 16 in the present embodiment has a nozzle shaft 51 having a suction port 16K for sucking the component BH at the lower end and a protrusion protruding outward from the side surface, and penetrates from the upper surface 71 to the lower surface 72 and the nozzle shaft 51 is inserted from above. It has a shaft holding portion 52 having an insertion hole 73 through which the protrusion 64 of the nozzle shaft 51 inserted into the insertion hole 73 is received from the upper end side to guide the vertical movement of the nozzle shaft 51, and is attached to the shaft holding portion 52. The configuration includes a retaining member 53 that prevents the protrusion 64 of the nozzle shaft 51 inserted through the insertion hole 73 from coming out of the upper end of the guide groove 74. Therefore, when assembling this nozzle 16, it is only necessary to insert the nozzle shaft 51 from above the insertion hole 73 provided in the shaft holding portion 52 and then attach the retaining member 53 to the upper part of the shaft holding portion 52.

[0039] Therefore, according to the component suction nozzle in the present embodiment, it is not necessary to perform the work of press-fitting a pin (corresponding to the protrusion 64 in the present embodiment), which is a minute component, to the side surface of the nozzle shaft 51 through a long hole (corresponding to the guide groove 74 in the present embodiment) formed in the shaft holding portion 52, which was necessary in the past. That is, it is not necessary to perform a highly difficult work of press-fitting a pin to the nozzle shaft 51 with the nozzle shaft 51 inserted into the shaft holding portion 52. Therefore, the nozzle 16 in the present embodiment is easy to assemble and disassemble, does not require advanced skills, and thus the workability of maintenance work and the like is significantly improved.

[0040] Although the embodiments of the present invention have been described so far, the present invention is not limited to those described above, and various modifications and the like are possible. For example, in the above-described embodiment, an annular O-ring is used as the retaining member 53 that prevents the protrusion 64 of the nozzle shaft 51 inserted into the insertion hole 73 of the shaft holding portion 52 from coming out of the upper end of the guide groove 74, but a "C"-shaped clip (C-type retaining ring) or the like may be used. Further, in the above-described embodiment, the configuration includes the buffer portion 90 that alleviates the impact received by the nozzle shaft 51 upward, but the buffer portion 90 does not necessarily have to be provided. Further, in the above-described embodiment, the component supply unit that supplies the component BH has been described by taking the tape feeder 13 using the component tape BT as an example, but the component supply unit is not limited to the tape feeder 13, and other means (for example, tray feeder, etc.) may be used.

Industrial Applicability

[0041] It can be applied to a component mounting device that performs component mounting work using a component suction nozzle.

Explanation of Reference Numerals

[0042] 1 Component mounting device 16 Nozzle (component suction nozzle) 16K Suction port 22 Nozzle holder 31 Holder main body portion 34 Sphere (engagement portion) 43 Biasing spring 51 Nozzle shaft 52 Shaft holding portion 53 Retaining member 64 Protrusion 71 Upper surface 72 Lower surface 73 Insertion hole 74 Guide groove 81 Sphere insertion portion (concave portion) 83 Flange portion 90 Buffer portion KB Substrate BH Component

Claims

1. A nozzle shaft having a suction port for sucking a component at its lower end and a protrusion protruding outward from its side surface, a shaft holding portion having an insertion hole extending through from the upper surface to the lower surface through which the nozzle shaft is inserted from above, and a guide groove for receiving the protrusion of the nozzle shaft inserted into the insertion hole from the upper end side to guide the vertical movement of the nozzle shaft, and a retaining member attached to the shaft holding portion for preventing the protrusion of the nozzle shaft inserted into the insertion hole from coming out of the upper end of the guide groove. A component suction nozzle comprising the same.

2. The retaining member is an O-ring or a C-ring stopper that is attached to the upper part of the shaft holding portion and extends intersecting the longitudinal direction of the guide groove. The component suction nozzle according to Claim 1.

3. The component suction nozzle according to Claim 2, having an annular groove in the upper part of the shaft holding portion into which the O-ring or the C-ring stopper is fitted.

4. The shaft holding portion has a flange portion protruding laterally from its lower part. The component suction nozzle according to Claim 1.

5. The shaft holding portion has a concave portion on its side surface with which an engaging portion provided in a nozzle holder of a component mounting device engages. The component suction nozzle according to Claim 1.

6. A component mounting device for mounting a component on a substrate using a component suction nozzle held by a nozzle holder, wherein the component suction nozzle has a suction port for sucking a component at its lower end and a protrusion protruding outward from its side surface, a shaft holding portion having an insertion hole extending through from the upper surface to the lower surface and a guide groove for receiving the protrusion of the nozzle shaft inserted from above the insertion hole to guide the vertical movement of the nozzle shaft, and a retaining member attached to the shaft holding portion for preventing the protrusion of the nozzle shaft inserted into the insertion hole from coming out of the upper end of the guide groove. A component mounting device comprising the same.

7. The nozzle holder includes a cylindrical holder body portion into which the shaft holding portion is inserted from below, an engaging portion that engages with the shaft holding portion inserted into the holder body portion, and a buffer portion that biases the nozzle shaft downward with respect to the shaft holding portion in a state where the engaging portion engages with the shaft holding portion to relieve an upward impact received by the nozzle shaft. The component mounting device according to Claim 6.

8. The component mounting device according to claim 6, wherein the retaining member is an O-ring or a C-clip that is attached to the upper part of the shaft holding portion so as to extend intersecting the longitudinal direction of the guide groove.

9. The component mounting device according to claim 8, having an annular groove into which the O-ring or the C-clip is fitted at the upper part of the shaft holding portion.

10. The component mounting device according to claim 6, wherein the shaft holding portion has a flange portion that projects laterally from its lower portion.

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