JPH0821437A - Supporting device - Google Patents

Abstract

PURPOSE:To delay the processing of the abrasion of a bearing which supports a lever in swing or a shaft in swing. CONSTITUTION:When a swing lever 78 is turned in one direction, the outer wheel 97 of a one-way clutch turns to turn an inner wheel 99, and a shaft 19 turns. Accordingly, a ball 88 does not rotate, and turns around the shaft 19, and the angular position for a supporting wall 79 is changed, and when the swing lever returns, the angular position is changed because the return to the original position is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supporting device for supporting a rocking lever or a shaft so as to be rockable with respect to a supporting member.

[0002]

2. Description of the Related Art A supporting device of this type is disclosed in Japanese Patent Laid-Open No. 3-16079.
It is disclosed in Japanese Patent Laid-Open No. 4 (1994), and the rocking lever is rocked as the cam locks and the cam rotates. The swing lever is supported on a support body via a bearing so as to be swingable around a shaft, or the shaft is swingably supported on a support body via a bearing, and the lever is fixed to the shaft. It has a structure.

[0003]

However, in the above-mentioned prior art, the rocking of the rocking lever or shaft is a reciprocating motion within a limited angular range, and the load from the lever or shaft is received by the bearing. However, the rotation angle of the balls in the bearing is very small, and the lubricating oil is not circulated, so that the oil film is easily broken and the wear progresses rapidly.

Therefore, an object of the present invention is to delay the progress of wear of a bearing that supports a swinging lever or a swinging shaft.

[0005]

Therefore, according to the present invention, the rocking lever is pivotably supported around a shaft that moves with the outer ring of the bearing and moves with the inner ring, with respect to a support body to which the shaft is attached. The supporting device is provided with a supporting means for rotatably supporting the shaft with respect to the supporting body.

Further, the present invention provides a support device in which a swing lever is moved together with an outer ring of a bearing and is swingably supported around a shaft which is moved together with an inner ring with respect to a support to which the shaft is attached. There is provided shaft rotating means for rotating the shaft rotatably supported with respect to the support body only by the swinging motion of the swinging lever in the forward direction.

Further, according to the present invention, in a support device for swingably supporting a shaft with respect to a support through a bearing composed of an outer ring, a rolling body and an inner ring that moves together with the shaft, the outer ring is supported with respect to the support. It is provided with a supporting means for rotatably supporting. Further, the present invention is a supporting device that rotatably supports a shaft via a bearing composed of an outer ring, a rolling body, and an inner ring that moves together with the shaft, and is rotatably supported with respect to the support. Further, a rotating means for rotating the outer ring only by the forward movement of the swing lever is provided.

[0008]

According to the structure of the first aspect, the shaft that moves together with the inner ring of the bearing having the outer ring that moves together with the swing lever that swings with respect to the support body rotates with respect to the support body. According to the structure of claim 2, the shaft rotating means moves the shaft, which moves together with the inner ring of the bearing rotatably supported by the supporting body, with respect to the rotating body only by the swinging motion of the swinging lever in the forward direction. The position of the inner ring with respect to the support in the rotational direction is changed each time the rocking lever is rotated and the rocking lever rocks.

According to the third aspect of the invention, the outer ring of the bearing that supports the shaft so as to be swingable with respect to the support rotates with respect to the support. According to the structure of claim 4, the rotating means rotates the outer ring of the bearing rotatably supported with respect to the support body only by the swinging motion of the shaft in the forward direction, and with respect to the support body each time the shaft swings. The position of the outer ring in the rotation direction is changed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. In FIG. 2 and FIG. 3, reference numeral 1 denotes a Y table which moves in the Y direction by rotation of the Y axis motor 2, and 3 indicates movement in the X direction on the Y table 1 by rotation of the X axis motor 4. As a result, an XY table that moves in the XY directions, and a printed circuit board 6 on which a chip-shaped electronic component 5 (hereinafter, referred to as a chip component or a component) is mounted is fixedly mounted on a fixing unit (not shown).

Reference numeral 7 denotes a supply table, on which a large number of component supply devices 8 for supplying the chip components 5 are arranged. Reference numeral 9 denotes a supply base drive motor, and by rotating the ball screw 10, the supply base 7 is guided by the linear guide 12 via a nut 11 fitted to the ball screw 10 and fixed to the supply base 7. Move in the direction. Reference numeral 13 denotes a rotary table that rotates intermittently, and mounting heads 15 having a plurality of suction nozzles 14 as take-out nozzles are arranged on the outer edge of the table 13 at equal intervals according to the intermittent pitch.

Reference numeral I denotes a suction station at which the suction nozzle 14 stops the mounting head 15 for picking up and picking up the component 5 from the supply device 8 by intermittent rotation of the rotary table 13. Adsorb 5 16 is a component 5 that the suction nozzle 14 sucks
This is a component recognition device for recognizing the positional shift of the component 5 by imaging the lower surface of the component 5 with a camera in a predetermined visual field range and recognizing the imaged screen, and is provided in the recognition station II.

Next mounting head 1 of the recognition station II
The position where 5 is stopped is the angle correction station III, and the angle amount for correcting the angular position deviation of the chip component 5 due to the recognition result of the recognition device 16 is added to the predetermined angle amount shown in the mounting data (not shown). The head rotating device 17 rotates the mounting head 15 in the θ direction by an amount. The θ direction is the direction of rotation around the axis of the nozzle 14.

The next stop position next to the angle correction station III is the mounting station IV, and the component 5 to be picked up by the suction nozzle 14 of the station IV on the board 6.
Are mounted by lowering the mounting head 15. In FIG. 4, reference numeral 18 denotes a support, and a swing lever 20 is rotatably attached around a lever support shaft 19 attached to the support 18. The lever 20 has a cam follower 23 that engages with the lower end of a cam 22 that is fixedly supported by a cam support shaft 21 that is rotatably provided on the support base 18.
Is attached. An elevating rod 29 is rotatably supported at the left end of the rocking lever 20, and an elevating plate 31 that is vertically movable by being guided by a linear guide 30 is attached to the lower end of the rod 29.

Reference numeral 32 is a rocking lever that pivotally supports an elevating rod 33. The rocking lever 32 is pivotally supported by the shaft 19 and is mounted on a cam (not shown) on the opposite side of the cam 22 which is pivotally supported by the cam support shaft 21 in the same manner as the lever 20. A cam follower (not shown) can be engaged. Reference numeral 34 denotes a swing lever that pivotally supports a lifting rod 35 so as to be rotatable, and is pivotally supported by a lever support shaft 19 and, similarly to the lever 20, is not shown on the side opposite to the cam 22 fixed to a cam support shaft 21. A cam follower (not shown) can be engaged with the cam.

A mounting plate 36 is provided below the support base 18.
Is fixed, and the linear guide 30 is attached to the mounting plate 3
It is attached to 6. An elevating rod mounting block 38 incorporating a ball spline is projected on the mounting plate 36, and a spline shaft 39 attached to a lower portion of the elevating rod 33 penetrates through the mounting plate 36. A linear guide 40 is attached to the mounting plate 36 and guides the vertical movement of the lifting plate 41 fixed to the lower end of the lifting rod 35.

Rising pieces 42 and 43 are formed on the lower ends of the lifting plates 31 and 41, respectively, and rollers 46 and 47 provided on the upper ends of the spline shafts 44 and 45 are placed on the rising pieces 42 and 43, respectively. Thus, the shafts 44 and 45 are supported. 48 and 49 are mobile units 5
0 is a projecting rod block, and a spline shaft 44 penetrates a ball spline (not shown) built in the block 48 so as to be vertically movable, and a ball spline 51 built in a block 49 splines the spline shaft 45.
Penetrates so that it can move up and down.

Lifting rods 52, 53, 54 are attached to the lower portions of the spline shafts 39, 44, 45, respectively. The shafts 39, 44, 45 are urged downward by a spring 55, which causes the swing levers 20, 32, 34 to move.
Are biased so as to rotate counterclockwise, and cam followers (not shown) provided on the cam follower 23 and the swing levers 32 and 34 are engaged with the cam 22 and a cam (not shown), respectively.

Reference numeral 62 is a motor mounted on the mounting plate 36, which rotates the ball screw 64.
A nut (not shown) fitted in 4 moves in the left-right direction in FIG. 4, and the moving body 50 to which the nut is fixed is guided by the linear guide 66 and moves in the left-right direction in FIG. A concave portion 67 is formed in the block 38 so that the moving body 50 can move.

The movement of the moving body 50 causes the shafts 44, 4 to move.
5, the rollers 46 and 47 move while rolling on the rising pieces 42 and 43, so that the lifting rods 53 and 54 move in the left-right direction in FIG. The rotation range of the ball screw 64 and the lateral lengths of the rising pieces 42, 43 are selected so that the rollers 46, 47 can move between the positions shown in FIG. 4 and the positions shown by broken lines in FIG. When the rollers 46 and 47 are at the positions indicated by the broken lines, the lifting rods 53 and 54 are at the positions indicated by the two-dot chain line in FIG.

The elevating bar 52 is attached to a position where the component 5 is sucked and is positioned above the component supply device 8 stopped by the movement of the supply base 7, and is elevated by the above-described structure. The tape feed drive lever 57 of the component supply device 8 is swung to intermittently feed the component storage tape (not shown) in which the chip components 5 are enclosed at predetermined intervals according to the intervals, and the chip components 5 are supplied to the component suction position of the suction nozzle 14. To do. The elevating rods 53 and 54 are moved up and down to drive the tape feeding operation of the component supply device 8 which is not in the position where the component 5 is sucked on both sides thereof.

Next, the mounting head 15 will be described.
Each mounting head 15 penetrates the rotary table 13 at two locations inside and outside so that it can move up and down.
4 is attached to the lower portion of the shaft 4, and the upper portion of the shaft 24 is fixed to an L-shaped roller attachment body 25. An upper cam follower 26 and a lower cam follower 27 projecting inward are rotatably supported on the upper portion of the roller mounting body 25.

A cylindrical cam 29 is provided around the rotary shaft of the rotary table 13 of the support 18 so as to be fixed to the support 18, and the upper cam follower 26 is provided with the cam 29.
The mounting head 15 is supported by suspending and supporting the mounting body 25 in contact with the upper surface of the mounting head 15. In FIG.
Reference numeral 70 denotes an elevating block having a U-shaped cross section. The elevating block 70 is arranged in a portion where the cylindrical cam 28 is cut out in the suction station I, and is mounted on an elevating plate 73 which moves up and down along a guide 72 attached to the support base 18. The upper end is attached.

The protrusion 74 at the lower part of the elevating block 70 is at the extended position of the elevating block 70 and is in the extension position of the cylindrical cam 28.
6, 27 are arranged so as to be able to transfer between the upper and lower sides of the projecting piece 74. The lift plate 73 is shown in FIG.
Is rotatably connected to a swing lever 78 shown in FIG. 4, and the lever 78 is engaged with a cam (not shown) by a mechanism similar to that of the swing lever 20 shown in FIG. The cam is a cam support shaft 2
1, the swing lever 78 is supported on the lever support shaft 19 as shown in FIG. 1, and swings around the shaft 19.

FIG. 4 is a view as seen in the direction of the arrow in the cross-section of the one-dot chain line AA in FIG. 1 and is a view as seen from the arrow BB in FIG. 3, but the shaft 19 is on the support base 18. It is rotatably attached to a support wall 79 as a support body that is erected upright via a bearing 80 as a support means. Reference numeral 81 is an inner ring that constitutes the bearing 80 fixed to the shaft 19, and 82 is an outer ring that constitutes the bearing 80 fixed to the support wall 79. Inner ring 81 and outer ring 82
A ball 83 is rotatably provided between the two.

The swing levers 20, 32, 34, 78 are rotatably attached to the shaft 19 via bearings 85, and the inner ring 86 of the bearing 85 is fixed to the shaft 19 and moves together. Thus, the swing levers 20, 32, 34, 78 are fixed to the outer ring 87 of the bearing 85 and move together.
Reference numeral 88 denotes a ball as a rolling member rotatably provided between the outer ring 87 and the inner ring 86, and rotates as the outer ring 87 rotates relative to the inner ring 86 to change its position in the direction of rotation. It is done like this.

A collar 89 is wound around the shaft 19 and keeps the intervals of the swing levers 20, 32, 34 and 78 constant. The collars 90, 91, 92 are also wound around the shaft 19 and fixed by a set screw 93 so that the axial position of the shaft 19 does not change with respect to the shaft 19. 91 and 92 rotate together with the shaft 19.

As shown in FIGS. 1 and 5, an engaging claw 95 as a shaft rotating means is attached to the swing lever 78, and the engaging claw 95 is an outer ring 97 of a one-way clutch 96 as a shaft rotating means. Recess 98 carved in
Is fitted. The one-way clutch 96 is the outer ring 9
7, an inner ring 99 and a needle 100 inserted therebetween, and the inner ring 99 is fixed to the collar 91. The one-way clutch 96 is configured such that the inner ring 99 rotates in the same direction and the same angle when the outer ring 97 rotates in one direction, but the inner ring 99 does not rotate when the outer ring 97 rotates in the opposite direction. is there. In this embodiment, when the swing lever 78 rotates counterclockwise in FIG. 5, the inner ring 99 rotates in the same direction, and when the lever 78 rotates clockwise, the inner ring 99 does not rotate. It is supposed to be done as follows.

The operation will be described below with the above configuration. First, the automatic operation of the electronic component automatic mounting apparatus is started by operating an operation unit (not shown). That is, according to the data indicating the mounting position of the component 5 to be mounted on the supply base 7 in the component mounting order (not shown), the motor 9 is rotated and the component supply device 8 for the component 5 to be supplied can tape feed the lifting rod 52. Stopped in position.

When a cam (not shown) rotates, the swing lever 3
2 through the bearing 85 around the shaft 19
When the tape feed drive lever 57 swings due to the lowering of the elevating bar 52, the tape 5 not shown is intermittently fed by a predetermined pitch to supply the component 5. When the feeding of the component 5 is completed, the swing lever 32 is rotated clockwise in FIG. 4 and the lifting bar 52 is raised. Thus, the swing lever 32 swings around the shaft 19 at a predetermined angle.

In parallel with the tape feeding operation, for example, the swing lever 34 is moved by the rotation of a cam (not shown).
9 through a bearing 85 to move the lifting bar 54
Is lowered and the tape feeding drive lever 57 of the component feeding device 8 for feeding the tape next is swung to move the next mounting head 15.
The tape is fed to take out the parts by the motor 62. Before this, the motor 62 is rotated so that the lifting rod 5 can come into contact with the lever 57 of the parts feeding device 8 where the parts should be taken out next.
The movement of 4 is performed in advance.

Then, by rotating a cam (not shown), the swing lever 78 is rotated about the shaft 19 through the bearing 85 by a predetermined angle (counterclockwise in FIG. 5 in the case of this embodiment). The elevating plate 73 connected to the lever 78 is guided by the guide 72 to descend, the elevating block 70 descends, and the head elevating shaft 24 descends, whereby the mounting head 15, that is, the suction nozzle 14 descends. The component 5 supplied by the supply device 8 is vacuum-sucked.

At this time, when the engaging claw 95 rotates the outer ring 97 in the same direction by rotating the swing lever 78 in the counterclockwise direction in FIG. 5, the inner ring 99 rotates in the same direction and at the same angle. Therefore, the collar 91 rotates in the same direction, and the shaft 19 rotates in the same direction via the bearing 80. That is, the inner ring 86 of the bearing 85 that supports the swing levers 20, 32, 34, and 78 rotates together with the shaft 19. Therefore,
In the bearing 85 of the rocking levers 20, 32, 34, the outer ring 87 is not rotated, and the ball 88 is the inner ring 86.
Is rotated with respect to the support wall 79. Further, in the bearing 85 of the swing lever 78, the inner ring 86 rotates together with the outer ring 87, and the ball 88 moves the inner ring 86 and the outer ring 87.
The rotation angle position with respect to the support wall 79 is changed around the shaft 19 without rotating (that is, without rotating).

Next, the rocking lever 78 is rotated clockwise in FIG. 5 by the subsequent rotation of the cam (not shown) to return to the original position, and the mounting head 15 is raised. With this operation,
The outer ring 97 of the one-way clutch 96 rotates in the same direction, but the inner ring 99 does not rotate and does not change the rotation angle position with respect to the support wall 79.
In the bearings 85 of Nos. 2 and 34, the rotational angle positions of the inner ring 86 and the balls 88 with respect to the support wall 79 remain unchanged, and the angular position direction within a certain range in which the load is applied by the swing of the swing lever in the bearing 85. In contrast, the rotation angle position of the ball 86 is changed. Further, in the bearing 85 of the rocking lever 78, the outer ring 87 rotates together with the rocking lever 78 and the inner ring 86 does not change its rotational angular position. As the outer ring 87 rotates, the ball 88 moves the outer ring 87. Although it does not return to the initial position but moves in a counterclockwise direction in FIG. 5 with respect to the support wall 79 compared to before the rocking of the rocking lever 78, it does not return to the initial position. Then, due to the swinging of the swinging lever 78 of the load in the bearing 85, the rotational angular position of the ball 86 is changed with respect to the angular position direction of a certain range where the load is applied.

Next, after the protrusion 74 of the elevating block 70 is raised to the highest position where it is at the same height as the cylindrical cam 28, the rotation of the rotary table 13 is started and the mounting head 15 stopped at the suction station I is moved. Cam follower 2
6, 27 move across the cam 28 and move to the next station. In this way, when the next mounting head 15 stops at the suction station I, the tape feeding operation of the component supply device 8 and the lifting operation of the mounting head 15 are performed in the same manner as described above, and the suction nozzle 14 sucks the component 5. At the same time, the shaft 19 rotates with respect to the support wall 79 to change the angular position, and the angular positions of the inner ring 86 and the ball 88 in each bearing 85 are changed. Each time the rocking lever 78 is rocked, the shaft is rotated counterclockwise by a predetermined angle in FIG. 5, the angular positions of the ball 88 and the inner ring 86 with respect to the support wall 79 are changed, and the ball 88 within a range in which a load is applied.
Since the oil film around the ball 88 is not broken, the ball 88 and the inner ring 86 of the raceway part
Also, the outer ring 87 is prevented from being worn.

Next, when the mounting head 15 holding the component 5 by suction stops at the component recognition station II, the component recognition device 16 sucks the component 5 by the suction nozzle 14.
Of the XY table 3 is corrected by the rotation of the head 15 of the head rotation device 17 at the angle correction station III, and the position of the XY table 3 is corrected at the mounting station IV. The printed circuit board is positioned at the position to be mounted, and the mounting head 15 descends in the same manner as in the suction station I to mount the component 5.

Further, in this embodiment, the component 5 is mounted on the printed circuit board 6
Although the electronic component automatic mounting device to be mounted on the above has been described, other printing such as a screen printing machine for printing cream solder on a printed circuit board, a dispenser for applying an adhesive for temporarily fixing components mounted on the printed circuit board, etc. Also in the board assembling apparatus, when the swing lever swinging by the cam or the like is supported around the shaft through the bearing, the shaft is rotated by the same structure to circulate the balls in the bearing, It is possible to prevent the oil film from breaking.

In this embodiment, the swing lever is attached to the shaft 1.
Although the case where the shaft 102 is supported around the shaft 9 has been described, a second embodiment will be described in which the shaft 102 swings to fix a lever or the like to the shaft as shown in FIG. A bearing 103 is wound around the shaft 102, and a one-way clutch 104 as a rotating means is further provided.
The inner ring 105 of the bearing 103 is fixed to the shaft 102, and the ball 10 as a rolling member is
A collar 108 is fixedly wound around an outer ring 107 that rotates with respect to the inner ring 105 via 6.

On the other hand, the inner ring 10 of the one-way clutch 104
The outer ring 110 is fixed to the shaft 102.
The engaging claws 111 projecting from the above are attached to the collar 108, so that the outer ring 107 rotates together with the outer ring 110. The collar 108 is fixed to an inner ring 114 of a bearing 113 attached to a support wall 112, and the one-way clutch 10 is rotated by rotating the shaft 102 in one direction.
4 outer rings 110 are both rotated in the same direction, and the bearing 1
The outer ring 107 of No. 03 is rotated in the same direction, and the ball 106 changes the angular position with respect to the support wall 114 without rotating. When the shaft 102 rotates in the opposite direction, only the inner ring 109 of the one-way clutch 104 rotates in that direction, the outer ring 110 does not change the rotational angular position with respect to the support wall 112, and therefore the ball 106 moves in the rotational direction of the shaft 102. Although it moves while rotating on its own axis, it does not return to the original position, and as a result, the shaft 102 moves once to a position deviated from the original position. When the shaft 102 continues to swing in this manner, the position of the ball 106 moves by a certain angle and the ball 1 at a position where a load is applied.
Since 06 is circulated, wear can be reduced.

In this embodiment, the shaft 19 or the collar 108 is rotated by rotating the swing lever 78 or the swinging shaft 102 via a one-way clutch.
8 is rotated by a drive source such as a motor at any timing or periodically to change the position of the ball of the bearing that receives a load in a predetermined direction applied to the swinging lever or the swinging shaft, and the oil film is cut off. You may not. A switch for rotating the motor may be provided to allow the operator to rotate the motor, or the motor may be rotated by a predetermined amount according to the number of times the rocking lever is rocked. It is also possible to always rotate at a predetermined speed during the moving automatic operation. Alternatively, a handle for rotating the shaft 19 or the collar 108 may be provided, and the operator may appropriately rotate the handle to rotate the shaft 19 or the like.

[0041]

As described above, according to the present invention, when the swing lever that swings with respect to the support moves with the outer ring of the bearing, it can rotate with respect to the shaft that moves with the inner ring of the bearing or the support. Therefore, the position of the inner ring of the bearing in the direction of rotation with respect to the support can be changed,
Along with this, the rolling elements such as the balls of the bearing can be changed in position, and the wear is reduced without the oil film running out.

Further, since the shaft rotating body rotates the shaft only when the swing lever moves forward, the rotational position of the shaft can be automatically changed without providing a separate drive source. Also, when the shaft moves with the inner ring of the bearing and swings with respect to the support, the outer ring of the bearing can rotate with respect to the support, so the rolling elements such as the balls of the bearing may change positions. It is possible to reduce wear without cutting the oil film.

Further, since the rotating means rotates the outer ring of the bearing only during the forward movement of the shaft, it is possible to automatically change the rotational position of the outer ring without providing a separate drive source.

[Brief description of drawings]

FIG. 1 is a side view showing a swing lever that swings around a shaft.

FIG. 2 is a plan view of an electronic component automatic mounting device to which the present invention is applied.

FIG. 3 is a side view of an electronic component automatic mounting device to which the present invention is applied.

FIG. 4B of FIG. 3 showing a lifting mechanism and a moving mechanism of a lifting rod.
FIG.

FIG. 5 is a diagram showing a one-way clutch and a swing lever.

FIG. 6 is a side view showing a state in which a one-way clutch is attached to the swinging shaft of the second embodiment.

[Explanation of symbols]

 19 shaft 20 swing lever 32 swing lever 34 swing lever 78 swing lever 79 support wall (support body) 80 bearing (support means) 85 bearing 86 inner ring 87 outer ring 88 ball 95 engaging claw (shaft rotating means) 96 one way Clutch (shaft rotating means) 102 Shaft 103 Bearing 104 One-way clutch (rotating means) 105 Inner ring 106 Ball (rolling body) 107 Outer ring

Claims (4)

[Claims] 1. A support device for moving a swing lever together with an outer ring of a bearing and swingably supporting a support attached to the shaft around a shaft that moves together with the inner ring. A supporting device comprising a supporting means for rotatably supporting the device. 2. A support device for swingably supporting a swing lever with an outer ring of a bearing and swingably with respect to a support mounted with the shaft around a shaft that moves with the inner ring. A supporting device, comprising shaft rotating means for rotating a rotatably supported shaft with respect to the support body only by an oscillating motion of the oscillating lever in a forward direction. 3. A support device for swingably supporting a shaft with respect to a support through a bearing composed of an outer ring, a rolling element, and an inner ring that moves together with the shaft, wherein the outer ring is rotatable with respect to the support. A supporting device, which is provided with a supporting means for supporting the device. 4. A support device for swingably supporting a shaft with respect to a support through a bearing composed of an outer ring, a rolling body, and an inner ring that moves together with the shaft, and is rotatably supported with respect to the support. Further, a supporting device is provided, which is provided with a rotating means for rotating the outer ring only by the forward movement of the swing lever.