Component supply device

Abstract

To provide a component supply device capable of easily replacing a gear mechanism requiring no removal or reinsertion of a press-fit unit.SOLUTION: A component supply device includes: a body that has a body frame and a tape transport path; a sprocket; a gear mechanism that transmits the output from a motor to the sprocket to rotate the sprocket; and a shaft fixing mechanism placed on the frame. The gear mechanism includes: a rotating shaft attached to a through hole that penetrates the body frame; and a first gear on one end of the rotating shaft and a second gear on the other end thereof. The rotating shaft is held in a bearing at the middle between the first gear and the second gear and is installed in the through hole. The shaft fixing mechanism presses the bearing against the inner wall of the through hole to fix it in place.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a component supply device. [Background technology]

[0002] A component supplying device is known that feeds a carrier tape having a plurality of pockets in which components are stored and on which cover tapes that seal the pockets are attached, and supplies the components to a component mounting device (see, for example, Patent Document 1). This component supplying device has a first sprocket that engages with feed holes provided in the carrier tape and rotates to transport the components to a supply position for the component mounting device, a second sprocket that engages with the feed holes in the carrier tape after the components have been supplied and rotates to discharge the carrier tape from the component supplying device, a motor that generates torque to drive the first sprocket and the second sprocket, and a plurality of gears that transmit the torque to the first sprocket and the second sprocket. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-9928 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the parts supply device disclosed in Patent Document 1, the outer ring of the bearing that serves as the bearing for the rotating shaft is press-fitted into the main body frame. Therefore, when the gear mechanism needs to be replaced due to wear or other deterioration over time, for example, the press-fit part needs to be removed and re-pressed, which increases the difficulty of the work for the worker performing the replacement.

[0005] The present disclosure provides a parts supply device that makes it easy to replace a gear mechanism by eliminating the need to remove and re-press-fit a press-fit portion. [Means for solving the problem]

[0006] A component supply device according to one embodiment of the present disclosure comprises a main body portion having a main body frame and a tape transport path, a sprocket, a gear mechanism that transmits output from a motor to the sprocket to rotate the sprocket, and a shaft fixing mechanism provided on the main body frame, wherein the gear mechanism includes a rotating shaft attached to a through hole that passes through the main body frame, a first gear provided at one end of the rotating shaft, and a second gear provided at the other end opposite to the one end of the rotating shaft, wherein the rotating shaft is attached to the through hole with an intermediate portion between the first gear and the second gear held by a bearing, and the shaft fixing mechanism fixes the bearing by pressing it against the inner wall of the through hole. [Effects of the Invention]

[0007] According to the component supply device of the present disclosure, it is possible to easily replace the gear mechanism by eliminating the need to remove and re-press-fit the press-fit portion. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a side view showing a configuration of a main part of a component supply device according to a first embodiment; [Figure 2] A perspective view showing a gear train of a gear mechanism [Figure 3] An enlarged side view of the main part near the first gear, as seen from one side of the gear mechanism [Figure 4] Cross section AA of Figure 3 [Figure 5] An enlarged side view of the main part of the gear mechanism seen from the other side [Figure 6] An enlarged side view of the main part with a cross-sectional line BB at a different cross-sectional position from that in Figure 3 marked on one side. [Figure 7] Cross section B-B of Figure 6 [Figure 8] An enlarged side view of the main part with the cross-sectional line BB shown in Figure 6 marked on the other side. [Figure 9] Close-up of shaft fixing mechanism [Figure 10] Explanation of the shaft fixing mechanism [Figure 11] Close-up of the shaft fixing mechanism with the bearing fixed [Figure 12]FIG. 10 is an enlarged side view of a main portion near a first gear, as seen from one side, of a gear mechanism according to a reference example in which a bearing supporting a drive shaft is press-fitted into a through-hole. [Figure 13] CC cross section of Figure 12 [Figure 14] An enlarged side view of the main part of Figure 13 as seen from the other side. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, with reference to the drawings as appropriate, a detailed description of an embodiment specifically disclosing a component supply device according to the present disclosure will be provided. However, unnecessary detailed description may be omitted. For example, detailed description of well-known matters or redundant description of substantially identical configurations may be omitted. This is to avoid unnecessary redundancy in the following description and to facilitate understanding by those skilled in the art. Note that the accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter recited in the claims.

[0010] 1 is a side view showing the configuration of a main part of a component supplying device according to embodiment 1. In embodiment 1, the component supplying device is, for example, a tape feeder 11. Tape feeder 11 is arranged so as to be connectable to a component mounting device (not shown) and has the function of supplying components to the component mounting device (not shown).

[0011] The tape feeder 11 comprises a main body 17 having a main body frame 13 and a tape transport path 15, a sprocket, a gear mechanism 21 that transmits the output from the motor 19 to the sprocket to rotate the sprocket, and a shaft fixing mechanism 23 provided on the main body frame 13.

[0012] The tape feeder 11 supplies components by conveying a carrier tape (not shown) having a plurality of pockets (not shown) in which components (not shown) are stored and to which cover tape (not shown) that seals the pockets is affixed. The carrier tape is conveyed by rotating a sprocket provided with engagement pins 25 that engage with feed holes (not shown) formed in the carrier tape.

[0013] The tape feeder 11 is configured by arranging the elements described below in a main body 17 made up of a plate-shaped main body frame 13. These elements are covered by side covers 27 (see FIG. 4) provided on both side surfaces. The main body 17 is provided with a tape transport path 15 that communicates from a tape insertion opening 29 (see FIG. 1) that opens at the bottom on the upstream side to a supply position 31 (see FIG. 1) set near the end of the upper surface on the upstream side. A carrier tape containing components is introduced from the tape insertion opening 29 into the tape transport path 15, transported via an oblique section provided in the middle of the main body 17 to the upper surface of the main body 17, and reaches the supply position 31.

[0014] At the supply position 31, a nozzle of a component mounting device (not shown) moves up and down to perform a component removal operation, thereby removing a component from the main body 17. The removed component is transferred to the component mounting device by the mounting head and mounted at a predetermined mounting position on the target board. The carrier tape is transported by the tape transport unit 33 during the component supply described above.

[0015] The tape transport unit 33 includes a motor 19, an introduction sprocket 35, a positioning sprocket 37, and a discharge sprocket 39. The introduction sprocket 35, the positioning sprocket 37, and the discharge sprocket 39 are driven by the motor 19, which serves as a drive source, so that the carrier tape inserted from the tape insertion port 29 is transported through the tape feeder and positioned at the supply position 31. After the components have been removed from the carrier tape at the supply position 31, the carrier tape is discharged by the discharge sprocket 39 to the downstream side of the tape feeder 11 via a front cover (not shown) arranged on the end face of the main body 17.

[0016] A convex portion 41 for connection with a component mounting device is provided on the underside of the upstream side of main body 17. A connector (not shown), an air joint (not shown), and a hook 43 are provided on convex portion 41, and when tape feeder 11 is set on a feeder base provided in a component supply section of the component mounting device, the connector and air joint physically fit with their counterpart (the component mounting device side) to establish a connected state. At this time, tape feeder 11 is fixed in position on the feeder base by hook 43. In this connected state, it is possible for the component mounting device to supply power and air to tape feeder 11, and further for signals to be exchanged between the component mounting device and tape feeder 11.

[0017] Next, the detailed configuration of the tape transport unit 33 will be described.

[0018] 2 is a perspective view showing a gear train of the gear mechanism 21. A motor 19 (see FIG. 1) is disposed at the lower end on the downstream side of the main body 17. A first gear 47 meshes with a drive gear 45 coupled to the output shaft of the motor 19, and a third gear 51 meshes with a second gear 49 provided coaxially with the first gear 47. A rotating shaft (drive shaft 53) supporting the first gear 47 and the second gear 49 is rotatably supported by a bearing 55 (see FIG. 11), which is a rolling bearing fixed to the main body frame 13. The second gear 49 may be press-fitted and fixed to the other end of the drive shaft 53, or may be formed integrally with the drive shaft 53.

[0019] A shaft (not shown) that supports the third gear 51 is rotatably fitted in a bearing fixed to a support member (not shown). The third gear 51 is engaged with a positioning sprocket gear 57 that is coaxial with the positioning sprocket 37 that positions the carrier tape, and an introduction sprocket gear 59 that is coaxial with the introduction sprocket 35 that transports the carrier tape to the positioning sprocket 37.

[0020] The positioning sprocket gear 57 and the positioning sprocket 37 are supported by a shaft (not shown), and the shaft is rotatably fitted in a bearing (not shown) fixed to the main body 17. The positioning sprocket gear 57 is engaged with a fourth gear 63 for transmitting torque to a discharge sprocket gear 61 that is coaxial with the discharge sprocket 39 that discharges the carrier tape.

[0021] In the above configuration, when the motor 19 is driven to generate torque, the torque is transmitted via multiple gears to the positioning sprocket gear 57, the discharge sprocket gear 61, and the introduction sprocket gear 59. As a result, the torque is transmitted to the positioning sprocket 37, the discharge sprocket 39, and the introduction sprocket 35, which are provided coaxially with the positioning sprocket gear 57, the discharge sprocket gear 61, and the introduction sprocket gear 59.

[0022] The introduction sprocket 35 rotates while engaging with the feed holes in the carrier tape, and transports the carrier tape to the positioning sprocket 37. The positioning sprocket 37 rotates while engaging with the feed holes provided in the carrier tape, and transports the components via the carrier tape to the supply position 31 for the component mounting device. The discharge sprocket 39 rotates while engaging with the feed holes in the carrier tape after the components have been supplied, and discharges the carrier tape from the tape feeder 11.

[0023] The motor 19 generates torque that drives the positioning sprocket 37, the discharge sprocket 39, and the introduction sprocket 35. The tape transport unit 33 configured as described above has a plurality of gears that transmit the torque generated by the motor 19 to the positioning sprocket 37, the discharge sprocket 39, and the introduction sprocket 35. These multiple gears constitute a gear mechanism 21 that includes a positioning sprocket gear 57 coaxial with the positioning sprocket 37, a discharge sprocket gear 61 coaxial with the discharge sprocket 39, and a fourth gear 63 that meshes with the positioning sprocket gear 57 and the discharge sprocket gear 61.

[0024] Engagement pins 25 are provided on the outer periphery of positioning sprocket 37. Feed holes are formed in the carrier tape at a pitch corresponding to the pitch of engagement pins 25. By intermittently rotating positioning sprocket 37 with the engagement pins 25 engaged with the feed holes, the carrier tape is fed along tape transport path 15 at a predetermined feed pitch. Similarly, by intermittently rotating discharge sprocket 39 and introduction sprocket 35, the carrier tape is fed at a predetermined feed pitch.

[0025] The multiple gears of the tape transport unit 33 further include the following gears: an introduction sprocket gear 59 coaxial with the introduction sprocket 35, a positioning sprocket gear 57, and a third gear 51 meshing with the introduction sprocket gear 59.

[0026] In the first embodiment, the tape transport unit 33 in which the above-described plurality of gears are arranged uses the single motor 19 as a drive source to rotate the introduction sprocket 35, the positioning sprocket 37, and the discharge sprocket 39.

[0027] As a result, the carrier tape introduced from the tape insertion port 29 is transported by the introduction sprocket 35 to the positioning sprocket 37. The carrier tape is then positioned at the supply position 31 by the positioning sprocket 37. Furthermore, after the components have been removed at the supply position 31, the carrier tape is discharged by the discharge sprocket 39 to the downstream side of the tape feeder 11.

[0028] 3 is an enlarged side view of the main portion of the gear mechanism 21 near the first gear, as viewed from one side. In this specification, the one side refers to the side drawn parallel to the plane of the paper in FIG. 1. The other side refers to the side on the reverse side of the plane of the paper in FIG. 1. In FIG. 3, the side shown in FIG. 1 is rotated 90° counterclockwise to facilitate understanding of the correlation between the cross-sectional lines drawn in the figure and the corresponding cross-sectional view in FIG. 4.

[0029] A first gear 47 is located on one side of the gear mechanism 21. A drive gear 45 fixed to the output shaft of the motor 19 meshes with the first gear 47.

[0030] Figure 4 is a cross-sectional view taken along line AA in Figure 3. Both sides of the gear mechanism 21 are covered by removable side covers 27. A through-hole 65 is formed in the main body frame 13, penetrating from one side to the other. A drive shaft 53 is rotatably supported in this through-hole 65 by a bearing 55. On the other side of the drive shaft 53, a second gear 49 fixed to the other end meshes with a third gear 51.

[0031] The gear mechanism 21 includes a drive shaft 53 mounted in a through hole 65 that penetrates the main body frame 13, a first gear 47 provided at one end of the drive shaft 53, and a second gear 49 provided at the other end opposite the one end of the drive shaft 53. At least one of the first gear 47 and the second gear 49 has an outer diameter smaller than the inner diameter of the through hole 65. The drive shaft 53 is mounted in the through hole 65 with an intermediate portion between the first gear 47 and the second gear 49 held by a bearing 55.

[0032] The third gear 51 has a third gear shaft 67 fixed to the outer ring of a bearing 69. The bearing 69 has an inner ring fixed to a slide shaft 71. The third gear 51 is prevented from coming off the slide shaft 71 by a third gear fixing screw 73. The slide shaft 71 is attached to the main frame 13 by a slide member 75 so as to be slidable in a direction along one side surface. The position of the slide shaft 71 can be adjusted by this sliding. The gear mechanism 21 adjusts the position of the slide shaft 71, thereby making it possible to adjust backlash in the tape transport section 33.

[0033] A positioning sprocket gear 57 meshes with the third gear 51. The positioning sprocket gear 57 is fixed to the outer ring of a bearing 77. The inner ring of the bearing 77 is fixed to a fixed shaft 79 which is fixed to the main body frame 13.

[0034] 5 is an enlarged side view of the main parts of gear mechanism 21 as seen from the other side. Gear mechanism 21 has a shaft fixing mechanism 23 on the other side of main body frame 13. Shaft fixing mechanism 23 has the function of pressing bearing 55 against the inner wall of through-hole 65 to fix it. Shaft fixing mechanism 23 has a fixing piece 83 that is guided by a guide groove 81 formed in main body frame 13 and is movable toward and away from the inner wall, and a fixing member (fixing bolt 85) that screws fixing piece 83 to main body frame 13.

[0035] The shaft fixing mechanism 23 may further include an eccentric pin 87 that is detachably inserted into the main body frame 13 in the same direction as the drive shaft 53 and that contacts the fixing piece 83 .

[0036] Figure 6 is an enlarged side view of the main part, with a cross-sectional line BB drawn on one side at a different cross-sectional position from that in Figure 3. Figure 6 depicts the same members as those shown in Figure 3, with the only difference being that the cross-sectional line is at BB instead of AA in Figure 3, so redundant explanations of the respective members will be omitted.

[0037] FIG. 7 is a cross-sectional view taken along the line B-B of FIG. 6. In the first embodiment, the outer diameter of the bearing 55 is smaller than the inner diameter of the through-hole 65. That is, the bearing 55 is a clearance fit in the through-hole 65. Therefore, the bearing 55 can be removed from the through-hole 65 to one side. Furthermore, the outer diameter of the second gear 49 fixed to the other end of the drive shaft 53 is smaller than the inner diameter of the through-hole 65. Therefore, the drive shaft 53 can be removed from one side as an assembly having the first gear 47 fixed to one end, the bearing 55 fixed midway, and the second gear 49 fixed to the other end. The drive shaft 53, the first gear 47, the bearing 55, and the second gear 49 can be referred to as a gear-bearing assembly 89. As an example, the gear-bearing assembly 89 of the tape feeder 11 can be used as a single replaceable part.

[0038] The shaft fixing mechanism 23 has a fixing bolt 85. The fixing bolt 85 passes through a through hole drilled in the fixing piece 83, and the tip of the fixing bolt 85 is screwed into a threaded hole 91 formed in the main body frame 13, thereby fixing the fixing piece 83 to the main body frame 13.

[0039] The shaft fixing mechanism 23 has an eccentric pin 87. The eccentric pin 87 further has a shaft portion 93. The shaft portion 93 is rotatably attached to the main body frame 13 by being inserted into an attachment hole 95 formed in the main body frame 13. The eccentric pin 87 has a cam disk portion 97 at the base end opposite the insertion tip, the center of which is offset from the center of the shaft portion 93 and the outer circumferential surface of which comes into contact with the fixed piece 83.

[0040] Figure 8 is an enlarged side view of the main part, with the cross-sectional line BB shown in Figure 6 drawn on the other side. Figure 8 depicts the same members as those shown in Figure 5, and only the position of the cross-sectional line BB, which represents the cross section shown in Figure 7, differs from the cross-sectional line AA in Figure 5, so redundant explanations of the respective members will be omitted.

[0041] 9 is an enlarged view of the shaft fixing mechanism 23. The fixed piece 83, which is provided slidably in the direction of arrow a along the guide groove 81, has an abutment surface 99 that comes into contact with the bearing 55 at its sliding tip surface facing the through hole 65. The abutment surface 99 is formed as a concave arc surface that follows a portion of the outer diameter circle of the outer ring of the bearing 55. When the eccentric pin 87 is rotated, the fixed piece 83 slides in a direction approaching the through hole 65. This approaching movement of the fixed piece 83 eliminates the gap d between the fixed piece 83 and the bearing 55 placed in the through hole 65, and allows the bearing 55 to be pressed against the inner wall 101 of the through hole 65.

[0042] 10 is an explanatory diagram of the operation of the shaft fixing mechanism 23. In the shaft fixing mechanism 23, the fixing bolt 85 is arranged so that it overlaps with an imaginary line 103 that connects the through-hole center Ck and the mounting hole center Cs. The abutment surface 99 of the fixing piece 83 has a concave arcuate surface whose center of curvature approximately coincides with the through-hole center Ck. The fixing piece 83 has a widthwise dimension w that is perpendicular to the movement direction (direction of arrow a) that is smaller than the inner diameter Id of the through-hole 65. The fixing piece 83 has a centerline 105 that is parallel to the movement direction and passes through the center point Pc in the widthwise direction and coincides with (overlaps with) the imaginary line 103.

[0043] The eccentric pin 87 is able to rotate when its shaft portion 93 is inserted into the mounting hole 95. A cam disk portion 97 formed at the base end of the shaft portion 93 is eccentric with respect to the shaft portion 93. Therefore, when the eccentric pin 87 is rotated around the shaft portion 93, the radius between the contact point of the cam disk portion 97 with the fixed piece 83 and the mounting hole center Cs changes. This allows the eccentric pin 87 to slide the fixed piece 83 in the direction approaching the through-hole 65.

[0044] 11 is an enlarged view of the shaft fixing mechanism 23 to which the bearing 55 is fixed. The bearing 55 has the inner diameter portion of the inner ring 107 fixed to the outer diameter portion of the drive shaft 53, and the outer diameter portion of the outer ring 109 loosely fitted into the inner diameter portion of the through hole 65. The bearing 55 is arranged between the inner ring 107 and the outer ring 109, with multiple rolling elements held by a cage. In the first embodiment, the bearing 55 is preferably a radial bearing that receives a radial load, for example.

[0045] By rotating the eccentric pin 87, the shaft fixing mechanism 23 slides the fixing piece 83 in a direction approaching the through-hole 65, eliminating the gap d between the abutment surface 99 and the outer ring 109 (setting d = 0), and can press the outer ring 109 of the bearing 55. As a result, the shaft fixing mechanism 23 can apply the fixing force of the fixing piece 83 in the diameter direction of the bearing 55, and sandwich the bearing 55 between the inner wall 101 and the fixing piece 83.

[0046] Next, the operation of the above-described configuration will be described.

[0047] The component supply device of embodiment 1 comprises a main body 17 having a main body frame 13 and a tape transport path 15, a sprocket, a gear mechanism 21 that transmits output from a motor 19 to the sprocket to rotate the sprocket, and a shaft fixing mechanism 23 provided on the main body frame 13, and the gear mechanism 21 includes a rotating shaft attached to a through hole 65 that passes through the main body frame 13, a first gear 47 provided at one end of the rotating shaft, and a second gear 49 provided at the other end opposite to the one end of the rotating shaft, at least one of the first gear 47 and the second gear 49 having an outer diameter smaller than the inner diameter of the through hole 65, and the rotating shaft is attached to the through hole 65 with an intermediate portion between the first gear 47 and the second gear 49 held by a bearing 55, and the shaft fixing mechanism 23 presses the bearing 55 against the inner wall 101 of the through hole 65 to fix it.

[0048] In the component supply device (tape feeder 11) according to the first embodiment, a main body 17 has a tape transport path 15 on a main body frame 13. A carrier tape having components stored in pockets is transported along the tape transport path 15. The carrier tape has a plurality of feed holes along the transport direction. The carrier tape is transported by engaging the feed holes with engagement pins 25 of a rotating sprocket. The sprocket is rotated by the output from a motor 19 transmitted by a gear mechanism 21.

[0049] Fig. 12 is an enlarged side view of a main part near a first gear of a gear mechanism 111 according to a reference example in which a bearing 55 supporting a drive shaft 53 is press-fitted into a through-hole 65, as seen from one side. Fig. 13 is a cross-sectional view taken along CC in Fig. 12. Fig. 14 is an enlarged side view of a main part of Fig. 13 as seen from the other side.

[0050] In a gear mechanism 111 according to the reference example, a first gear 47 is press-fitted and fixed to one end of a drive shaft 53 shown in Fig. 12. A bearing 55 shown in Fig. 13 has an inner ring 107 press-fitted and fixed to the drive shaft 53, and an outer ring 109 press-fitted and fixed in a through-hole 65. A second gear 49 shown in Fig. 14 is press-fitted and fixed to the other end of the drive shaft 53, or is formed integrally with the other end of the drive shaft 53.

[0051] Generally, gear mechanisms require replacement due to wear over time on the shaft (drive shaft 53), bearings (bearings 55), and transmission mechanical elements (gears, etc.). In the gear mechanism 111 according to the reference example, the bearing 55, which rotatably supports the drive shaft 53 on the main body frame 13, is attached by press-fitting into the through-hole 65 of the main body frame 13. This increases the difficulty of the work involved in removing and reinstalling the bearing 55.

[0052] Therefore, the tape feeder 11 according to the present embodiment has a configuration that makes it possible to easily replace the drive shaft 53, bearing 55, and gear without the need to remove and re-press-fit the press-fit portion.

[0053] That is, in the gear mechanism 21, the drive shaft 53 is attached to a through hole 65 that penetrates the main body frame 13. The drive shaft 53 has a first gear 47 fixed to one end and a second gear 49 fixed to the other end. The drive shaft 53 is held by a bearing 55 at an intermediate portion between the first gear 47 and the second gear 49. The first gear 47, the drive shaft 53, and the second gear 49 may be configured as a single assembly (gear-bearing assembly 89). In the gear-bearing assembly 89, the outer diameter of at least one of the first gear 47 and the second gear 49 is set to be smaller than the inner diameter of the through hole 65. In the first embodiment, the outer diameter of the second gear 49 is smaller than the inner diameter of the through hole 65.

[0054] Therefore, the gear-bearing assembly 89 can be assembled to the main body frame 13 by passing the second gear 49 through the through-hole 65 and arranging the bearing 55 in the through-hole 65 .

[0055] In the gear and bearing assembly 89, an inner ring 107 of the bearing 55 and the drive shaft 53 are fixed so as to be unable to rotate relative to each other. This fixation can be achieved, for example, by a key and key groove structure or by an interference fit.

[0056] On the other hand, the outer ring 109 of the bearing 55 is not press-fit into the through hole 65. In other words, the outer ring 109 of the bearing 55 and the through hole 65 are not tightly fitted together.

[0057] The outer ring 109 of the bearing 55 and the through hole 65 may be a transition fit. In a transition fit, the maximum allowable dimension of the outer ring 109 is larger than the minimum allowable dimension of the through hole 65 (including the case where they are equal), and the minimum allowable dimension of the outer ring 109 is smaller than the maximum allowable dimension of the through hole 65. A transition fit may result in an interference or a gap, depending on the actual dimensions of the through hole 65 and the outer ring 109. That is, in the tape feeder 11, the through hole 65 and the outer ring 109 allow a fit that creates an interference and does not require a press-fitting tool. Of course, the fit between the through hole 65 and the outer ring 109 also includes a fit (loose fit) that creates a gap between the through hole 65 and the outer ring 109, as will be described later.

[0058] Tape feeder 11 is provided with shaft fixing mechanism 23 on main body frame 13. Shaft fixing mechanism 23 fixes bearing 55 by pressing it against inner wall 101 of through hole 65. In other words, bearing 55 fixed to drive shaft 53 is fixed to inner wall 101 of through hole 65 by pressing outer ring 109 of bearing 55 from one end side to the other end side in the diameter direction.

[0059] The main body frame 13 is formed with a small thickness in the width direction of the carrier tape. Side covers 27 are attached to both sides of the main body frame 13 in the thickness direction, covering the gear mechanism 21. The main body frame 13 is formed with a through hole 65 penetrating in the thickness direction. As described above, in the gear-bearing assembly 89, at least one of the first gear 47 and the second gear 49 is smaller than the through hole 65. Therefore, by removing both side covers 27 and releasing the shaft fixing mechanism 23, the entire assembly can be easily removed from the main body frame 13 by pulling the second gear 49 out of the through hole 65, and a new one can be reinstalled.

[0060] As a result, in the tape feeder 11, when replacing the gear mechanism 21, it is not necessary to remove and re-press-fit the press-fit portion, so that the replacement work can be carried out easily and in a short time.

[0061] In addition, in the component supply device, the shaft fixing mechanism 23 has a fixed piece 83 that is arranged on the main frame 13 and is freely movable in the direction toward and away from the inner wall 101, and a fixing member that screws the fixed piece 83 to the main frame 13.

[0062] In this tape feeder 11, the shaft fixing mechanism 23 presses and fixes the bearing 55 against the inner wall 101 of the through hole 65. The bearing 55 fixed to the drive shaft 53 is fixed to the inner wall 101 of the through hole 65 by pressing the outer ring 109 of the bearing 55 from one end side to the other end side in the diameter direction. In other words, the bearing 55 is sandwiched between the inner wall 101 and the shaft fixing mechanism 23 and fixed to the main body frame 13.

[0063] The shaft fixing mechanism 23 has a fixing piece 83 that presses against the bearing 55. The fixing piece 83 is capable of linear movement (sliding) along a guide groove 81 formed in the main body frame 13. A portion of the through hole 65 in the circumferential direction opens into this guide groove 81. In other words, the fixing piece 83, guided by the guide groove 81, is capable of moving freely toward and away from the inner wall 101.

[0064] As a result, with the bearing 55 of the gear-bearing assembly 89 placed in the through-hole 65, the shaft fixing mechanism 23 allows the fixing piece 83 placed in the guide groove 81 to press the outer ring 109 of the bearing 55 toward the inner wall 101. In order to maintain the pressed state of the bearing 55, the fixing piece 83 is fastened (screwed) to the main body frame 13 by the fixing bolt 85. When the fixing bolt 85 is released from the shaft fixing mechanism 23, the fixing piece 83 becomes movable again, and the bearing 55 can be removed from the through-hole 65.

[0065] In the component supply device, the shaft fixing mechanism 23 includes an eccentric pin 87 that is detachably inserted into the main body frame 13 in the same direction as the rotation shaft and that contacts the fixing piece 83.

[0066] In this tape feeder 11, shaft fixing mechanism 23 has eccentric pin 87 that is inserted into main body frame 13 in the same direction as the rotation shaft and that contacts fixed piece 83. Eccentric pin 87, which is inserted into main body frame 13 and contacts fixed piece 83, presses fixed piece 83, which is arranged in guide groove 81, toward bearing 55 when rotated.

[0067] In shaft fixing mechanism 23, fixing piece 83 fixes bearing 55 with the controlled pressing force of eccentric pin 87, which will be described later, and then fixing piece 83 is fixed to main body frame 13 with fixing bolt 85. In shaft fixing mechanism 23, eccentric pin 87 may be removed after fixing of bearing 55 is complete. In other words, tape feeder 11 can be shipped from the factory with eccentric pin 87 still attached, or with eccentric pin 87 removed.

[0068] In addition, in the component supply device, the outer diameter of the bearing 55 is smaller than the inner diameter of the through hole 65.

[0069] In this tape feeder 11, bearing 55 fixed to drive shaft 53 is a clearance fit in through hole 65. As described above, the fit between through hole 65 and bearing 55 includes a transition fit, but it is also possible to exclude the transition fit and have only a clearance fit.

[0070] In this case, when the fixation by the fixing piece 83 is released, a gap is created between the through hole 65 and the bearing 55, making it possible for the bearing 55 to be easily removed from the through hole 65, thereby further improving workability.

[0071] In addition, in the component supply device, the eccentric pin 87 has a shaft portion 93 that is inserted into a mounting hole 95 formed in the main frame 13, and a cam disk portion 97 that is offset from the center of the shaft portion 93 to bring its outer surface into contact with the fixed piece 83.

[0072] In this tape feeder 11, eccentric pin 87 has a shaft portion 93 and a cam disk portion 97 whose center is offset from the center of shaft portion 93. Shaft portion 93 is rotatably inserted into a mounting hole 95 formed in main body frame 13. When eccentric pin 87 has shaft portion 93 inserted into mounting hole 95, the outer peripheral surface of cam disk portion 97 comes into contact with fixed piece 83.

[0073] Because the cam disk portion 97 is eccentric with respect to the shaft portion 93, when the eccentric pin 87 rotates around the shaft portion 93, the distance (radius) from the outer peripheral surface in contact with the fixed piece 83 to the center of the shaft portion changes. That is, the eccentric pin 87 can change the contact pressure (pressing force) of the outer peripheral surface of the cam disk portion 97 on the bearing 55. This pressing force increases as the rotational torque of the eccentric pin 87 increases. This allows the shaft fixing mechanism 23 to control the fixing force of the outer ring 109 by controlling the tightening torque of the eccentric pin 87. Note that in this embodiment, the eccentric pin 87 is used to slide the fixed piece 83 in a direction approaching the through hole 65, but this is not limited to this. For example, a screw installed in a direction pressing the fixed piece 83 may be used to slide the fixed piece 83 in a direction approaching the through hole 65.

[0074] Furthermore, in the component supply device, the fixing member is disposed on an imaginary line connecting the center of the through hole and the center of the mounting hole.

[0075] In this tape feeder 11, the fixing bolt 85 is positioned on an imaginary line connecting the through-hole center Ck and the mounting hole center Cs, so that the fixing force of the fixing piece 83 can be applied in the radial direction of the bearing 55, and the bearing 55 can be sandwiched between the inner wall 101 and the fixing piece 83.

[0076] This makes it possible to prevent the coaxiality between the through hole 65 and the bearing 55 from decreasing over a long period of time.

[0077] In addition, in the component supply device, the fixed piece 83 has a width dimension perpendicular to the movement direction that is smaller than the inner diameter of the through hole 65, and a center line 105 parallel to the movement direction that passes through the center point in the width direction coincides with the imaginary straight line 103.

[0078] In this tape feeder 11, the dimension w of the fixed piece 83 in the width direction perpendicular to the movement direction is smaller than the inner diameter Id of the through hole 65. In other words, the circumferential distance of the unopened portion of the through hole 65 is greater than the circumferential distance of the portion that is opened by connection with the guide groove 81. In other words, the through hole 65 has a C-shape in plan view. This allows the through hole 65 to hold the bearing 55 with high coaxiality.

[0079] Furthermore, the fixed piece 83 has a center line 105 that is parallel to the direction of movement and passes through the center point Pc in the width direction, and coincides with the above-mentioned virtual line 103. This coincidence only needs to occur when projected in a direction along the rotation axis. The contact surface of the fixed piece 83 with the bearing 55 is formed as an abutment surface 99 that is a concave arc surface that follows a portion of the outer diameter circle of the outer ring 109 of the bearing 55.

[0080] The center of curvature of the concave arc surface of this abutment surface 99 substantially coincides with the center Ck of the through hole. As a result, the fixing piece 83 contacts the bearing 55 with equal arc lengths on both sides of the imaginary line 103, so no moment is generated in the drive shaft 53. As a result, the shaft fixing mechanism 23 can hold the bearing 55 with high coaxiality.

[0081] In the first embodiment, an example has been described in which the outer diameter of at least one of the first gear 47 and the second gear 49 is smaller than the inner diameter of the through hole 65. However, in the component supply device according to the present invention, the outer diameters of both the first gear 47 and the second gear 49 may be larger than the inner diameter of the through hole 65. In this case, at least one of the first gear 47 and the second gear 49 is removably fixed to the drive shaft 53 by a structure other than press-fitting. An example of a removably fixed structure is a key and key groove structure. As a result, in the gear and bearing assembly 89, by removing either the first gear 47 or the second gear 49 from the drive shaft 53, the drive shaft 53 and the bearing 55 can be extracted from the through hole 65, as in the first embodiment. As a result, the removal and re-press-fitting of the press-fit portion is not necessary, and the replacement work can be performed easily and in a short time.

[0082] Therefore, according to the tape feeder 11 according to the first embodiment, it is possible to easily replace the gear mechanism 21 by eliminating the need to remove and re-press-fit the press-fit portion.

[0083] Summary of the Disclosure The above description of the embodiments discloses technical concepts corresponding to the following items.

[0084] (Item 1) The component supply device according to the present disclosure includes a main body (17) having a main body frame (13) and a tape transport path (15), sprockets (35, 37, 39), a gear mechanism (21) that transmits output from a motor (19) to the sprocket to rotate the sprocket, and a shaft fixing mechanism (23) provided on the main body frame, The gear mechanism includes: a rotating shaft (53) mounted in a through-hole (65) passing through the main body frame, a first gear (47) provided at one end of the rotating shaft, and a second gear (49) provided at the other end opposite to the one end of the rotating shaft, The rotation axis is An intermediate portion of the first gear and the second gear is held by a bearing (55) and is mounted in the through hole, The shaft fixing mechanism includes: The bearing is pressed against the inner wall (101) of the through hole and fixed. As a result, with the component supply device, when replacing the gear mechanism, it is not necessary to remove and re-press-fit the press-fit portion, so the replacement work can be carried out easily and in a short time.

[0085] (Item 2) The shaft fixing mechanism has a fixing piece (83) that is arranged on the main body frame and is movable toward and away from the inner wall, and a fixing member (85) that screws the fixing piece to the main body frame. Item 1. The component supply device according to item 1. As a result, with the component supply device, when the bearing of the gear-bearing assembly is placed in the through hole, the shaft fixing mechanism allows the fixing piece placed in the guide groove to press the outer ring of the bearing toward the inner wall.

[0086] (Item 3) The shaft fixing mechanism includes an eccentric pin (87) that is detachably inserted into the main body frame in the same direction as the rotation shaft and contacts the fixing piece. Item 1 or 2. The component supply device. As a result, according to the component supply device, the eccentric pin inserted into the main frame and in contact with the fixed piece can be rotated to press the fixed piece arranged in the guide groove toward the bearing.

[0087] (Item 4) The outer diameter of the bearing is smaller than the inner diameter of the through hole. Item 3. The component supply device according to item 3. As a result, according to the component supplying device, the bearing can be easily attached and detached from the through hole, thereby further improving workability.

[0088] (Item 5) The eccentric pin has a shaft portion (93) that is inserted into a mounting hole formed in the main body frame, and a cam disk portion (97) whose center is offset from the center of the shaft portion and whose outer circumferential surface contacts the fixed piece. Item 4. The component supply device according to item 4. As a result, according to the component supplying device, the eccentric pin can change the contact pressure (pressing force) applied to the bearing by the outer circumferential surface of the cam disc portion.

[0089] (Item 6) The fixing member is disposed on a virtual line (103) connecting the center of the through hole (Ck) and the center of the mounting hole (Cs). Item 5. The component supply device according to item 5. As a result, the component supply device can suppress a decrease in the coaxiality between the through hole and the bearing for a long period of time.

[0090] (Item 7) The fixed piece has a width dimension (w) perpendicular to the moving direction that is smaller than the inner diameter of the through hole, and a center line passing through the center point in the width direction and parallel to the moving direction coincides with the virtual straight line. Item 6. The component supply device according to item 6. As a result, the component supply device allows the through hole to hold the bearing with high coaxiality.

[0091] Although the embodiments have been described above with reference to the accompanying drawings, the present disclosure is not limited to such examples. It is clear that a person skilled in the art can conceive of various modifications, alterations, substitutions, additions, deletions, and equivalents within the scope of the claims, and it is understood that these also fall within the technical scope of the present disclosure. Furthermore, the components in the above-described embodiments may be combined in any manner without departing from the spirit of the invention. [Explanation of symbols]

[0092] 11...Tape feeder (component supply device) 13...Main frame 15...Tape transport path 17...Main body 19...Motor 21...Gear mechanism 23...Shaft fixing mechanism 35...Introducing sprocket (sprocket) 37... Positioning sprocket (sprocket) 39...Discharge sprocket (sprocket) 47...1st gear 49…2nd gear 53...Drive shaft (rotating shaft) 55...Bearing 65...Through hole 83…Fixed piece 85...Fixing bolt (fixing member) 87...Eccentric pin 93...Shaft 95...Mounting hole 97...Cam disc part 101…Inner wall 103...imaginary line 105...Center line Ck…through hole center Cs…Attachment hole center Pc…center point w...Width dimension

Claims

1. a main body having a main body frame and a tape transport path; a sprocket; a gear mechanism that transmits output from a motor to the sprocket to rotate the sprocket; and a shaft fixing mechanism provided on the main body frame; The gear mechanism includes: a rotating shaft mounted in a through-hole passing through the main body frame, a first gear provided at one end of the rotating shaft, and a second gear provided at the other end opposite to the one end of the rotating shaft, The rotation axis is an intermediate portion of the first gear and the second gear is held by a bearing and attached to the through hole; The shaft fixing mechanism includes: The bearing is pressed against the inner wall of the through hole and fixed thereto. Parts supply device.

2. The shaft fixing mechanism has a fixing piece that is arranged on the main body frame and is movable toward and away from the inner wall, and a fixing member (85) that screws the fixing piece to the main body frame. The component supply device according to claim 1 .

3. the shaft fixing mechanism includes an eccentric pin that is detachably inserted into the main body frame in the same direction as the rotation shaft and that contacts the fixing piece, 3. The component supply device according to claim 2.

4. The outer diameter of the bearing is smaller than the inner diameter of the through hole.

4. The component supply device according to claim 3.

5. The eccentric pin has a shaft portion that is inserted into a mounting hole formed in the main body frame, and a cam disk portion whose center is offset from the center of the shaft portion and whose outer peripheral surface contacts the fixed piece.

5. The component supply device according to claim 4.

6. The fixing member is disposed on a virtual line connecting the center of the through hole and the center of the mounting hole.

6. The component supply device according to claim 5.

7. a dimension of the fixed piece in a width direction perpendicular to the moving direction is smaller than an inner diameter of the through hole, and a center line passing through a center point in the width direction and parallel to the moving direction coincides with the virtual straight line; 7. The component supply device according to claim 6.

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