Mounting machine and mounting method

Abstract

This mounting apparatus for mounting components with a mounting head comprises: a cooling device including a linear motor for moving the mounting head by a reciprocal movement of a movable unit, a cooling duct having an air intake port and a flow path formed by sheet metal, and a fan disposed in the flow path, wherein the cooling duct is connected to the movable unit at a bottom portion of the flow path. The cooling duct has a ceiling wall forming a ceiling of the flow path, and an erect wall formed by being bent relative to the ceiling wall so as to be erect from a portion of the edge of the intake port. The erect wall has a flange portion formed by being bent in a flange shape along the edge of the intake port from both ends, and a notch-like gap is formed at both ends of the boundary with the ceiling wall.

Description

[Technical Field]

[0001] This specification discloses a mounting machine and a mounting method. [Background technology]

[0002] Conventionally, there has been proposed a device that includes two linear motion devices that linearly move a component mounting head, and that mounts components while moving the head in the X and Y directions. For example, Patent Document 1 describes a device that includes a linear motor and a cooling duct as the linear motion device. Furthermore, Patent Document 2 describes a cooling duct for an electronic device or the like that is made of sheet metal, and gaps that occur at the joints of the sheet metal or the like are sealed with a sealant such as silicone rubber. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-96889 [Patent Document 2] Japanese Patent Application Laid-Open No. 2015-216155 Summary of the Invention [Problem to be solved by the invention]

[0004] As mentioned above, sealing the gaps in the cooling ducts can prevent air from entering or leaving the gaps, thereby suppressing a decline in cooling performance. However, depending on the size of the gaps, it can be difficult to seal them properly, and the amount of sealant used can increase, resulting in higher costs. For this reason, it is necessary to minimize the gaps.

[0005] A primary object of the present disclosure is to reduce the gap in the cooling duct and suppress a decrease in cooling performance. [Means for solving the problem]

[0006] The present disclosure has adopted the following means to achieve the above-mentioned main object.

[0007] The first mounting machine of the present disclosure includes: A mounting machine that mounts components using a mounting head, a linear motor that moves the mounting head by reciprocating a movable unit; a cooling device including a cooling duct having an air intake port and a flow passage formed of sheet metal, and a fan disposed in the flow passage, the cooling duct being connected to the movable element unit at a bottom of the flow passage; Equipped with the cooling duct has a ceiling wall that forms a ceiling of the flow passage, and an upright wall that is bent relative to the ceiling wall so as to stand from a part of an edge of the intake port, The upright wall has flange portions formed by bending the upright wall from both ends to form flange-like shapes along the edges of the intake port, and notch-like gaps are formed at both ends of the boundary with the ceiling wall.

[0008] In the mounting machine of the present disclosure, the gap in the cooling duct can be reduced to suppress a decrease in cooling performance. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 2 is an explanatory diagram showing an example of a mounting machine 10. [Figure 2] FIG. 2 is a diagram showing the outline of the configuration of a Y-axis moving device 20. [Figure 3] FIG. 2 is a diagram showing an outline of the internal configuration of a Y-axis moving device 20. [Figure 4] FIG. 2 is a diagram showing the outline of the configuration of a cooling duct 40. [Figure 5] FIG. 3 is a diagram showing the outline of the configuration of a suction side member 41. [Figure 6] FIG. 3 is a diagram showing the outline of the configuration of a discharge side member 51. [Figure 7] Enlarged view of part A in Figure 2. [Figure 8] Enlarged view of part B in Figure 2. [Figure 9] Enlarged view of part C in Figure 2. [Figure 10]FIG. 10 is an explanatory view showing a gap at a portion C in a comparative example. [Figure 11] Enlarged view of part D in Figure 2. [Figure 12] FIG. 10 is an enlarged view of part A of the modified example. DETAILED DESCRIPTION OF THE INVENTION

[0010] Next, an embodiment of the present disclosure will be described with reference to the drawings. Fig. 1 is an explanatory diagram showing an example of a mounting machine 10. Fig. 2 is a configuration diagram showing an outline of the configuration of a Y-axis movement device 20. Fig. 3 is a configuration diagram showing an outline of the internal configuration of the Y-axis movement device 20. In this embodiment, the left-right direction (X-axis direction), front-rear direction (Y-axis direction), and up-down direction (Z-axis direction) are as shown in Fig. 1.

[0011] As shown in Fig. 1, the mounting machine 10 includes a component supply unit 11, a board transport unit 13, a mounting head 15, and a moving device 17. The component supply unit 11 is, for example, a tape feeder that supplies components by pulling out a carrier tape, on which components are stored at predetermined intervals, from a reel and feeding it to a component supply position. The board transport unit 13 includes a pair of conveyor belts that are spaced apart at the front and rear of the board transport unit 10 in Fig. 1 and span the left and right directions, and drives the conveyor belts to transport the board S. The board transport unit 13 includes two pairs of conveyor belts and can transport two boards S simultaneously.

[0012] The mounting head 15 includes one or more suction nozzles 16. The suction nozzles 16 pick up (pick up) components supplied by the component supply unit 11, and place (mount) the components at a mounting position on the board S transported by the board transport unit 13. The movement device 17 includes an X-axis movement device 18 that moves the mounting head 15 in the X-axis direction, and a Y-axis movement device 20 that moves the mounting head 15 in the Y-axis direction together with a slider 19 on which the X-axis movement device 18 is mounted. The mounting head 15 is moved to a component pickup position or mounting position by the movement device 17. In this embodiment, for example, the X-axis movement device 18 is configured using a ball screw mechanism, and the Y-axis movement device 20 is configured using a linear motor. Note that while FIG. 1 illustrates the mounting head 15 and movement device 17 located on the right side of the mounting machine 10, a similarly configured mounting head 15 and movement device 17 are also located on the left side of the mounting machine 10, symmetrically to the right side. The configuration of the Y-axis movement device 20 will be described in detail below.

[0013] As shown in FIGS. 2 and 3, the Y-axis movement device 20 includes a shaft-type linear motor 21 and a cooling device 30 that cools the linear motor 21.

[0014] The linear motor 21 includes a motor shaft 22 (see FIG. 1) fixed in the mounting machine 10 so as to extend along the Y-axis direction, and a mover unit 25 having a plurality of coils 23. Although not shown, the motor shaft 22 includes a plurality of ring-shaped permanent magnets, which are arranged so that their north and south magnetic poles are alternately aligned in the Y-axis direction. The plurality of coils 23 are aligned along the Y-axis direction so that the motor shaft 22 passes through a central hole. The mover unit 25 is connected to the slider 19, and moves along the Y-axis direction when a current is applied to each coil 23.

[0015] The cooling device 30 is connected (fixed) to, for example, the upper part of the movable element unit 25, and moves along the Y-axis direction integrally with the movable element unit 25. The cooling device 30 includes a cooling duct 40, a plurality of fans 32, a plurality of heat dissipation fins 34, a plurality of heat transfer members 36, and an exhaust duct 38.

[0016] The cooling duct 40 is configured to circulate air drawn in through the intake port 40i through a flow passage 40p along the X-axis direction by the drive of the fan 32. The intake port 40i is rectangular (oblong) in top view. Three fans 32 are arranged at the downstream end of the flow passage 40p, for example, and are driven to rotate so as to circulate air in the direction of the arrows in FIG. 3. The heat dissipation fins 34 are thin metal plate-like members, and a plurality of them are arranged at predetermined intervals so that their plate surfaces align with the air flow direction in the flow passage 40p. The heat transfer member 36 is a metal pipe-like member containing a heat medium and arranged so as to extend linearly upward from between the coils 23 of the movable element unit 25 toward the cooling duct 40. The heat generated by the coils 23 is transferred to the heat dissipation fins 34 via the heat transfer member 36 (heat medium) and then dissipated from the heat dissipation fins 34 into the air flowing through the flow passage 40p. The exhaust duct 38 is attached to the cooling duct 40 via the fan 32. The exhaust duct 38 is made of sheet metal, and discharges the air that has passed through the cooling duct 40 and been discharged from the fan 32 obliquely upward from an exhaust port 38o.

[0017] The configuration of cooling duct 40 will now be described in further detail. Fig. 4 is a diagram showing an outline of the configuration of cooling duct 40. Fig. 5 is a diagram showing an outline of the configuration of suction side member 41. Fig. 6 is a diagram showing an outline of the configuration of discharge side member 51. Cooling duct 40 is made up of suction side member 41 and discharge side member 51, which are made of sheet metal, and suction side member 41 and discharge side member 51 are joined by rivets or the like to form a duct having a substantially rectangular parallelepiped shape. Cooling duct 40 is arranged so that its longitudinal direction is in the Y-axis direction.

[0018] The suction side member 41 has a substantially rectangular suction wall 42, a pair of side walls 43 formed by bending both longitudinal ends of the suction wall 42 relative to the suction wall 42, and a fixing portion 44 formed by bending the lower end of the side wall 43 relative to the side wall 43. In other words, the suction side member 41 is a member in which the suction wall 42, the pair of side walls 43, and the fixing portion 44 are integrally formed by bending a single metal plate.

[0019] The suction wall 42 forms one long side of the suction port 40i at its upper end as part of the edge of the suction port 40i. The side wall 43 forms two short sides of the suction port 40i at its upper end as part of the edge of the suction port 40i and also forms the side surface of the flow passage 40p, and has multiple through holes for rivet joining. The fixing portion 44 has through holes formed therein through which screws for fixing to the moving piece unit 25 are inserted (not shown).

[0020] The discharge side member 51 has a ceiling wall 52 that forms the ceiling of the flow path 40p, an upright wall 54 formed by bending the upstream end of the flow path 40p relative to the ceiling wall 52, and an end wall 56 formed by bending the downstream end of the flow path 40p relative to the ceiling wall 52. In other words, the discharge side member 51 is a member in which the ceiling wall 52, the upright wall 54, and the end wall 56 are integrally formed by bending a single sheet of metal.

[0021] The ceiling wall 52 is formed with a step so that the ceiling of the flow channel 40p is one step lower on the downstream side in the flow direction than on the upstream side, and for example, a step portion 52s is formed approximately in the center in the flow direction. The ceiling wall 52 also has a pair of joint portions 53 used for joining to the side walls 43. The joint portions 53 are formed by bending both longitudinal ends of the ceiling wall 52 upstream of the step portions 52s toward the inside of the flow channel 40p. The joint portions 53 have a plurality of through holes for rivet joining formed therein.

[0022] The standing wall 54 has a pair of flange portions 55. The flange portions 55 are formed by bending from both longitudinal ends of the standing wall 54 toward the opposite side from the ceiling wall 52 (toward the suction port 40i) along the side wall 43, that is, along the short side direction of the suction port 40i in a top view. One through-hole for rivet joining is formed in the flange portions 55. The end wall 56 is formed with three openings 56a in which the fans 32 are disposed.

[0023] The end wall 56 has a pair of first joint portions 57 and a pair of second joint portions 58 used for joining to the side walls 43. The first joint portions 57 are formed by bending at approximately right angles from both longitudinal ends of the end wall 56 toward the inside of the flow channel 40p so as to follow the side walls 43. The second joint portions 58 are formed by bending at approximately right angles from both ends of the lower side of the end wall 56 toward the inside of the flow channel 40p, and are also formed by bending at approximately right angles upward within the flow channel 40p beyond the first joint portions 57 so as to follow the side walls 43. A plurality of through holes for rivet joining are formed in the first joint portions 57 and the second joint portions 58.

[0024] The cooling duct 40 is also configured to minimize gaps between the joints of each component and gaps required for bending relief. The main gaps are described below. While only one side of each gap is shown, the opposite side is also formed in the same manner. FIG. 7 is an enlarged view of portion A in FIG. 2. As shown, the discharge-side component 51 has a notched gap 40a at the edge of the boundary between the ceiling wall 52 and the standing wall 54. This gap 40a is a bending relief portion used when forming the standing wall 54 and flange portion 55 by bending, and is formed as a relatively small gap at the base end of the standing wall 54. This prevents air being drawn in through the intake port 40i while being guided by the standing wall 54 and flange portion 55 from leaking through the gap 40a.

[0025] 8 is an enlarged view of portion B in FIG. 2. As shown in the figure, the moving element unit 25 has an extending wall 26 that extends above the connection point with the cooling duct 40, i.e., above the boundary between the fixed portion 44 and the moving element unit 25. This extending wall 26 is formed with a bent portion 27 having a first bent portion 27a that bends outward at the upper end and a second bent portion 27b that bends further upward from the first bent portion 27a, i.e., in the extension direction of the extending wall 26. Meanwhile, the suction wall 42 of the suction-side member 41 is formed so as to extend downward to a position where it overlaps with the bent portion 27 (second bent portion 27b). In addition, the side wall 43 extends to the connection point with the moving element unit 25 so as to cover the bent portion 27 (first bent portion 27a) and the side surfaces of the extending wall 26 from both sides. This allows the gap 40b between the suction side member 41 and the extending wall 26 or the bent portion 27 to be made relatively small, thereby preventing air drawn in from the suction port 40i from leaking through the gap 40b or preventing air from entering through the gap 40b.

[0026] FIG. 9 is an enlarged view of portion C in FIG. 2. As shown, the end wall 56 of the discharge-side member 51 has a contact portion 56b that contacts the side wall 43 when the first and second joint portions 57 and 58 are joined to the side wall 43. Therefore, small gaps 40c (40c1, 40c2) are formed on both sides of the contact portion 56b between the first and second joint portions 57 and 58 and the side wall 43. FIG. 10 is an explanatory diagram showing the gap at portion C in a comparative example. As shown, the comparative example does not have a contact portion 56b, resulting in a larger gap 140c than in this embodiment, resulting in greater air inflow and outflow. In this embodiment, the gap 40c between the end wall 56 and the side wall 43 can be made relatively small, thereby preventing air circulating through the flow passage 40p from leaking through the gap 40c or preventing air from entering through the gap 40c.

[0027] 11 is an enlarged view of portion D in FIG. 2. As shown in the figure, a notched gap 40d is formed in the ceiling wall 52 of the discharge-side member 51 at the base end of the joint 53. This gap 40d is formed as a bending relief portion when the joint 53 is formed by bending. Furthermore, the ceiling wall 52 has an abutting portion 52a that abuts against the side wall 43 between the gap 40d and the step portion 52s when the joint 53 is joined to the side wall 43. This allows the gap 40d to be relatively small, thereby preventing air flowing through the flow passage 40p from leaking through the gap 40d or from entering through the gap 40d.

[0028] Here, the correspondence between the components of this embodiment and the components of the present disclosure will be clarified. In this embodiment, the mover unit 25 corresponds to a mover unit, the linear motor 21 corresponds to a linear motor, the cooling duct 40 corresponds to a cooling duct, the fan 32 corresponds to a fan, and the cooling device 30 corresponds to a cooling device. The ceiling wall 52 corresponds to a ceiling wall, the standing wall 54 corresponds to a standing wall, and the flange portion 55 corresponds to a flange portion. The extension wall 26 corresponds to an extension wall, the bent portion 27 corresponds to a bent portion, the suction wall 42 corresponds to a suction wall, and the side wall 43 corresponds to a side wall. The end wall 56 corresponds to an end wall, the first joint portion 57 corresponds to a first joint portion, the second joint portion 58 corresponds to a second joint portion, and the abutment portion 56b corresponds to an abutment portion. The joint portion 53 corresponds to a joint portion, and the abutment portion 52a corresponds to an abutment portion. The heat dissipation fins 34 correspond to fins. In addition, in this embodiment, the mounting machine 10 is described to clarify an example of a mounting method.

[0029] As described above, the mounting machine 10 reduces the gaps 40a-40d of the cooling duct 40 to suppress the inflow and outflow of air, thereby stabilizing the flow rate of air flowing through the flow path 40p and appropriately suppressing a decline in cooling performance. Furthermore, in this embodiment, no sealant is used to seal the gaps, thereby preventing an increase in cost and suppressing a decline in cooling performance. Furthermore, the mounting machine 10 prevents overheating of the mover unit 25 (coil 23) of the linear motor 21 and enables stable operation of the Y-axis movement device 20, thereby maintaining good positional accuracy of the mounting head 15. Therefore, the mounting machine 10 can mount components accurately. The temperature of the coil 23 during mounting rose to approximately 100°C in the configuration before reducing the gaps 40a-40d. However, this temperature was reduced to approximately 90°C with the configuration of this embodiment. In other words, it was confirmed that reducing the gaps 40a-40d of the cooling duct 40 improved cooling performance (effectiveness) by approximately 10°C.

[0030] Furthermore, in the mounter 10, the plurality of heat dissipation fins 34 can rectify the air flow in the flow passage 40p. This makes it possible to prevent a decrease in cooling performance and the scattering of dust and the like due to turbulence in the airflow. Furthermore, when the mounter 10 mounts components, the scattered dust and the like can be prevented from adhering to the board S, thereby improving the mounting quality.

[0031] It goes without saying that the present disclosure is not limited to the above-described embodiments, and can be embodied in various forms as long as they fall within the technical scope of the present disclosure.

[0032] In the above embodiment, the four gaps 40a to 40d of the cooling duct 40 are exemplified, but the cooling duct 40 may be configured so that at least one gap is small.

[0033] In the embodiment, a plurality of heat dissipating fins 34 are provided in the flow passage 40p of the cooling duct 40, but this is not limitative, and the heat dissipating fins 34 may not be provided.

[0034] In the embodiment, the cooling duct 40 is connected to the mover unit 25 at the bottom of the flow path 40p, i.e., the cooling duct 40 is arranged above the mover unit 25, but this is not limiting. The cooling duct 40 may also be arranged on the left or right side of the mover unit 25. Furthermore, although the cooling device 30 includes the exhaust duct 38 which is a separate member from the cooling duct 40, the exhaust duct 38 may not be included. Alternatively, the exhaust duct 38 may be formed integrally with a component of the cooling duct 40, and the cooling duct 40 may be configured to have a small gap, including the exhaust duct.

[0035] In the embodiment, the gap in the cooling duct 40 is not sealed, but this is not limited thereto, and a sealant for sealing the gap may be provided. FIG. 12 is an enlarged view of portion A of the modified example. As shown in the figure, the gap 40a (see FIG. 7) is sealed by filling the gap 40a with a sealant 60. By sealing the gap 40a in this manner, air is prevented from flowing in or out of the gap 40a, and a decrease in cooling performance can be reliably suppressed. The sealant 60 may be a material that can be filled into the gap 40a, such as rubber or adhesive, or may be tape that closes the gap 40a. Furthermore, in the modified example, the gap 40a is illustrated as an example, but the other gaps 40b to 40d may also be sealed with a sealant. It is sufficient that at least one of the gaps 40a to 40d is sealed with a sealant.

[0036] In the embodiment, the Y-axis moving device 20 is configured using a linear motor, but this is not limited to this, and the X-axis moving device 18 may be configured using a linear motor, or both the X-axis moving device 18 and the Y-axis moving device 20 may be configured using linear motors.

[0037] Here, the mounting method of the present disclosure can suppress the deterioration of cooling performance, similar to the mounting machine described above. In this mounting method, various aspects of the mounting machine may be adopted, or configurations or steps may be added to realize each function of the mounting machine. [Industrial Applicability]

[0038] The present disclosure is applicable to fields such as the manufacturing of cooling ducts and mounting machines. [Explanation of symbols]

[0039] 10 Mounting machine, 11 Component supply unit, 13 Board transport unit, 15 Mounting head, 16 Suction nozzle, 17 Moving device, 18 X-axis moving device, 19 Slider, 20 Y-axis moving device, 21 Linear motor, 22 Motor shaft, 23 Coil, 25 Moving element unit, 26 Extension wall, 27 Bent portion, 27a First bent portion, 27b Second bent portion, 30 Cooling device, 32 Fan, 34 Heat dissipation fin, 36 Heat transfer member, 38 Exhaust duct, 38o Discharge port, 40 Cooling duct, 40a, 40b, 40c, 40d, 140c Gap, 40i Intake port, 40p Flow passage, 41 Intake side member, 42 Intake wall, 43 Side wall, 44 Fixing portion, 51 Discharge side member, 52 Ceiling wall, 52a Contact portion, 52s Step portion, 53 joint portion, 54 standing wall, 55 flange portion, 56 end wall, 56a opening portion, 56b abutment portion, 57 first joint portion, 58 second joint portion, 60 sealing material, S substrate.

Claims

1. A mounting machine that mounts components using a mounting head, a linear motor that moves the mounting head by reciprocating a movable unit; a cooling device including a cooling duct having an air intake port and a flow passage formed of sheet metal, and a fan disposed in the flow passage, the cooling duct being connected to the movable element unit at a bottom of the flow passage; Equipped with the cooling duct has a ceiling wall that forms a ceiling of the flow passage, and an upright wall that is bent relative to the ceiling wall so as to stand from a part of an edge of the intake port, The standing wall has flange portions formed by bending both ends into flange shapes along the edges of the intake port, and notched gaps are formed at both ends of the boundary with the ceiling wall. Mounting machine.

2. A mounting machine that mounts components using a mounting head, a linear motor that moves the mounting head by reciprocating a movable unit; a cooling device including a cooling duct having an air intake port and a flow passage formed of sheet metal, and a fan disposed in the flow passage, the cooling duct being connected to the movable element unit at a bottom of the flow passage; Equipped with the movable element unit has an extending wall having a bent portion formed thereon that extends in an extending direction toward the cooling duct beyond a connection point with the cooling duct, bends outward, and further bends in the extending direction, the cooling duct has an intake wall extending to form a part of the edge of the intake port, and a pair of side walls bent relative to the intake wall to form side surfaces of the flow passage, the suction wall extends to overlap the bent portion of the extension wall, The side walls cover the bent portion from both sides so as to reduce a gap between the extending wall and the bent portion, and extend to a connection point with the movable unit. Mounting machine.

3. A mounting machine that mounts components using a mounting head, a linear motor that moves the mounting head by reciprocating a movable unit; a cooling device including a cooling duct having an air intake port and a flow passage formed of sheet metal, and a fan disposed in the flow passage, the cooling duct being connected to the movable element unit at a bottom of the flow passage; Equipped with the cooling duct has a pair of side walls that form side surfaces of the flow passage, and an end wall that forms an opening at a downstream end of the flow passage in which the fan is disposed, The end wall has first joints formed by bending from both ends along the side walls and used for joining to the side walls, and second joints extending along the flow path from a bottom side of the flow path closer to the first joints and formed by bending along the side walls and used for joining to the side walls, and abutting portions are formed between the first joints and the second joints that abut against the side walls so as to reduce a gap between the side walls. Mounting machine.

4. A mounting machine that mounts components using a mounting head, a linear motor that moves the mounting head by reciprocating a movable unit; a cooling device including a cooling duct having an air intake port and a flow passage formed of sheet metal, and a fan disposed in the flow passage, the cooling duct being connected to the movable element unit at a bottom of the flow passage; Equipped with the cooling duct has a pair of side walls that form side surfaces of the flow passage, and a ceiling wall that forms a step such that the ceiling of the flow passage is lower on the downstream side than on the upstream side, The ceiling wall has a joint portion formed by bending along the side wall from both ends on the upstream side or downstream side of the step, and used for joining to the side wall, and a notched gap is formed at the base end of the joint portion, and an abutting portion that abuts against the side wall is formed between the step and the bending relief portion. Mounting machine.

5. 5. The mounting machine according to claim 1, The cooling device has a plurality of flat fins arranged in the air flow path along the air flow direction. Mounting machine.

6. 6. The mounting machine according to claim 1, a sealant for sealing the gap in the cooling duct; Mounting machine.

7. Components are mounted on a board by the mounting machine according to any one of claims 1 to 6. How to implement it.

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