JP2019149391A - Component supply device - Google Patents

Abstract

To provide a component supply device that can prevent a lifting and lowering object from falling due to the tearing of a transmission belt.SOLUTION: In a component supply device 13 including a magazine 23 for retractably storing a component storage body 22 in which a component PT is stored, a storage body drawer 24 for pulling out the component storage body 22 from the magazine 23, and an elevating mechanism 25 for moving up and down the storage body drawer 24 relative to the magazine 23, the elevating mechanism 25 includes a drive motor 31 for generating a rotational force, a ball screw 32 that moves up and down the storage body drawer 24 by rotating around a vertical axis, a transmission belt 33 that transmits the rotational force generated by the drive motor 31 to the ball screw 32 to rotate the ball screw 32, and a rotation regulating mechanism 34 that regulates the rotation of the ball screw 32 when the transmission belt 33 is torn.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a component supply apparatus that pulls out a component storage body in which components are stored from a magazine and supplies the components.

  2. Description of the Related Art Conventionally, a component supply apparatus known as a tray feeder includes a magazine that detachably stores a component storage body in which components (including wafers and the like) are stored, a storage body extraction unit that pulls out the component storage body from the magazine, and a storage body An elevating mechanism for elevating the drawer portion relative to the magazine is provided. The elevating mechanism includes a drive motor that generates a rotational force, a ball screw that moves up and down the storage body drawer or magazine by rotating around a vertical axis, and a rotational force generated by the drive motor that is transmitted to the ball screw. A component belt is supplied by positioning the component storage body pulled out by the storage body extraction portion at a predetermined position (see, for example, Patent Document 1 below).

JP 2010-28064 A

  However, in the component supply apparatus having the above configuration, when the transmission belt is torn due to some reason such as aging or external factors, the ball screw can freely rotate. The magazine or magazine) may fall under its own weight.

  Then, an object of this invention is to provide the components supply apparatus which can prevent the fall of the raising / lowering target object by the tearing of a transmission belt.

  The component supply apparatus according to the present invention includes a magazine for retractably storing a component storage body in which components are stored, a storage body extraction portion for pulling out the component storage body from the magazine, and the storage body extraction portion with respect to the magazine. A lifting / lowering mechanism that relatively moves up and down, wherein the lifting / lowering mechanism rotates the vertical axis around the drive motor that generates a rotational force and the storage body drawer or the magazine. A ball screw that moves up and down, a transmission belt that transmits the rotational force generated by the drive motor to the ball screw and rotates the ball screw, and a rotation restriction that restricts rotation of the ball screw when the transmission belt is torn And a mechanism.

  According to the present invention, it is possible to prevent the lifting / lowering object from falling due to the tearing of the transmission belt.

The block diagram of the component mounting apparatus provided with the component supply apparatus in 1st Embodiment of this invention. The side view of the components supply apparatus in 1st Embodiment of this invention. The (a) side view of the rotation control mechanism with which the component supply apparatus in 1st Embodiment of this invention is equipped (b) The top view seen from arrow V1-V1 of a side view The partial cross section side view of the gear unit with which the components supply apparatus in 1st Embodiment of this invention is provided. The partial cross-section exploded side view of the gear unit with which the component supply apparatus in 1st Embodiment of this invention is provided. The disassembled perspective view of the gear unit with which the component supply apparatus in 1st Embodiment of this invention is provided. (A) (b) The top view of a part of gear unit and engagement unit with which the component supply apparatus in 1st Embodiment of this invention is provided. (A) (b) The top view of the rotation control mechanism with which the components supply apparatus in 1st Embodiment of this invention is provided. The partial cross section side view of the gear unit with which the components supply apparatus in the modification of 1st Embodiment of this invention is provided. The disassembled perspective view of the gear unit with which the components supply apparatus in the modification of 1st Embodiment of this invention is provided. (A) (b) The top view of a part of gear unit with which the components supply apparatus in the modification of 1st Embodiment of this invention is equipped, and an engagement unit The side view of the rotation control mechanism with which the components supply apparatus in 2nd Embodiment of this invention is provided. (A) Side view of the rotation restricting mechanism provided in the component supply device according to the third embodiment of the present invention (b) Plan view seen from the arrow V2-V2 of the side view

(First embodiment)
FIG. 1 shows a component mounting apparatus 1 according to a first embodiment of the present invention. The component mounting apparatus 1 is a device that mounts a component PT on a board KB, and includes a base 11, a board transport unit 12, a component supply apparatus 13, a mounting head 14, and a head moving mechanism 15. Here, for convenience of explanation, the left-right direction as viewed from the operator OP (the vertical direction in FIG. 1) is taken as the X-axis direction, and the front-back direction as viewed from the operator OP (the left-right direction in FIG. 1). Is the Y-axis direction, and the vertical direction (upward direction in FIG. 1) is the Z-axis direction.

  In FIG. 1, the substrate transport unit 12 includes a pair of conveyor mechanisms 12a, and transports (loads) the substrate KB in the X-axis direction and positions it at a predetermined work position. The component supply device 13 supplies the component PT to a predetermined component supply position AR. The configuration of the component supply device 13 will be described later.

  The head moving mechanism 15 moves the mounting head 14 in the horizontal plane direction. The head moving mechanism 15 moves the mounting head 14 to reciprocate between the component supply device 13 and the substrate KB (arrow A shown in FIG. 1). The mounting head 14 repeats the operation of picking up the component PT supplied by the component supply device 13 at the lower end and the operation of mounting the picked-up component PT on the substrate KB. Thus, when all the components PT to be mounted are mounted on the substrate KB, the substrate transport unit 12 carries the substrate KB out of the component mounting apparatus 1.

  Next, the configuration of the component supply device 13 will be described. In FIG. 2, the component supply device 13 is a tray feeder here, and includes a carriage 21, a component storage body 22, a magazine 23, a storage body extraction unit 24, and an elevating mechanism 25.

  The carriage 21 includes a plurality of wheels 21H, and the operator OP can connect the carriage 21 to the base 11 of the component mounting apparatus 1 by moving the carriage 21 in a floor shape. The carriage 21 has a wall surface 21W extending upward from the upper surface 21K and a bracket portion 21B extending horizontally forward from the lower portion of the wall surface 21W.

  The component storage body 22 is a pallet-shaped member that stores a component PT (including a wafer and the like). In the present embodiment, the component storage body 22 holds a plurality of trays 22T, and a plurality of components PT are placed in an aligned state on each tray 22T.

  The magazine 23 is provided on the upper surface 21K of the carriage 21. The magazine 23 includes a plurality of slots 23S provided side by side in the vertical direction. A component storage body 22 is housed in each slot 23S of the magazine 23 so as to be drawn out and retractable.

  The storage body drawer part 24 has a horizontal table part 24a and a slider part 24b extending vertically downward from the rear end part of the table part 24a. An elevation guide 21G is provided on the wall surface 21W of the carriage 21 so as to extend in the vertical direction, and the slider portion 24b is slidable in the vertical direction (movable up and down) as guided by the elevation guide 21G.

  A component storage body drawer storage mechanism 24c is provided on the upper surface of the table portion 24a. The component storage body drawer storage mechanism 24 c has a function of pulling out the component storage body 22 from the slot 23 </ b> S of the magazine 23. A nut member 24N is provided on the lower surface of the table portion 24a.

  The elevating mechanism 25 is a mechanism for elevating and lowering the storage body drawer portion 24 relative to the magazine 23, and includes a drive motor 31, a ball screw 32, a transmission belt 33, and a rotation regulating mechanism 34. The drive motor 31 is attached to the upper surface side of the bracket portion 21B, and the end portion of the drive shaft 31J directed downward is protruded below the bracket portion 21B of the carriage 21 (FIG. 3A).

  The ball screw 32 extends in the vertical direction and penetrates the bracket portion 21B of the carriage 21 in the vertical direction, and the lower end portion 32T protrudes below the bracket portion 21B (FIG. 3A). The upper end of the ball screw 32 penetrates through the nut member 24N and the housing drawer part 24 from below. The ball screw 32 is screwed with the nut member 24N.

  3A and 3B, a drive pulley 41 is attached to a portion of the drive shaft 31J that protrudes below the bracket portion 21B. On the other hand, a driven pulley 42 is attached to the lower end portion 32T of the ball screw 32 protruding downward from the bracket portion 21B. The rotating surface of the driving pulley 41 and the rotating surface of the driven pulley 42 are located in the same horizontal plane.

  3 (a) and 3 (b), the transmission belt 33 is stretched around a drive pulley 41 and a driven pulley 42. The transmission belt 33 transmits the rotational force generated by the drive motor 31 to the ball screw 32. The bracket portion 21B is provided with a tension pulley support shaft 43J extending downward. A tension pulley 43 is attached to the tension pulley support shaft 43J so as to be rotatable about a vertical axis (Z axis). The tension pulley 43 is pressed against the transmission belt 33 between the drive pulley 41 and the driven pulley 42, and gives an appropriate tension (tension) to the transmission belt 33.

  As described above, the ball screw 32 is connected to the drive shaft 31J of the drive motor 31 via the transmission belt 33. For this reason, when the drive motor 31 is controlled by a control unit (not shown) and the drive shaft 31J rotates, the rotational force generated by the rotation of the drive shaft 31J is transmitted to the ball screw 32 through the transmission belt 33. As a result, the ball screw 32 rotates about the vertical axis (Z axis), and the nut member 24N moves up and down with respect to the ball screw 32, so that the storage body drawer 24 moves up and down with respect to the magazine 23.

  The rotation direction of the ball screw 32 can be changed by switching the rotation direction of the drive shaft 31J, whereby the storage body drawer 24 can be raised or lowered. That is, the storage body drawer 24 is raised or lowered according to the forward / reverse direction of the rotation direction of the drive shaft 31J of the drive motor 31. In the present embodiment, when the drive shaft 31J is rotated in the clockwise direction as viewed from above, the ball screw 32 is also rotated in the clockwise direction as viewed from above, and the storage body drawer 24 is lowered. On the other hand, when the drive shaft 31J is rotated in the counterclockwise direction as viewed from above, the ball screw 32 is also rotated in the counterclockwise direction as viewed from above (arrow R shown in FIG. 3B), and the storage body is drawn out. The part 24 rises. Hereinafter, the rotation direction of the ball screw 32 that raises the storage body drawing portion 24 is referred to as “upward rotation direction”, and the rotation direction of the ball screw 32 that moves the storage body extraction portion 24 downward is referred to as “downward rotation direction”.

  When the component PT to be mounted on the board KB is positioned at the component supply position AR, the control unit firstly sets the target height (in the magazine 23) of the component storage body 22 in which the target component PT is stored ( The position of the slot 23S is grasped. Then, the drive motor 31 is actuated to raise and lower the storage body drawer 24 to be positioned at the target height. Then, the component storage body drawer storage mechanism 24c is operated to pull out the component storage body 22 from the slot 23S and place it on the table portion 24a.

  When the component storage body 22 is placed on the table portion 24a, the drive motor 31 is operated to raise the storage body extraction portion 24, and the component storage body 22 is positioned at the component supply position AR. When exchanging the part PT located at the part supply position AR, the part storage body 22 located at the part supply position AR is returned to the original slot 23S and stored in the reverse order of the above procedure. The component storage body 22 is positioned at the component supply position AR by the above procedure.

  3A and 3B, the rotation restricting mechanism 34 includes a gear unit 51, an engagement unit 52, and a sensor unit 53. The gear unit 51 is attached to the drive shaft 31J of the drive motor 31. The engagement unit 52 and the sensor unit 53 are provided on the upper surface 21 </ b> K of the carriage 21.

  As shown in FIGS. 4, 5, and 6, the gear unit 51 includes a first gear 61, a second gear 62, an upper pressing member 63, a lower pressing member 64, a coupling screw 65, a pin member 66, and a plate. A shaped member 67 is provided. The first gear 61 and the second gear 62 have the same outer shape and size, and the second gear 62 is superimposed on the lower side of the first gear 61. The upper pressing member 63 is positioned above the first gear 61, and the lower pressing member 64 is positioned below the second gear 62.

  6 and 7A and 7B, the teeth TH of the first gear 61 and the teeth TH of the second gear 62 have the same shape and the same number. The first gear 61 and the second gear 62 are used for a ratchet wheel, and the tip of each tooth TH has a shape inclined in the downward rotation direction (arrow R shown in FIG. 6). .

  In FIG. 4, the superimposed first gear 61 and second gear 62 are vertically sandwiched between an upper pressing member 63 and a lower pressing member 64. The coupling screw 65 penetrates the central part of these four members (the upper pressing member 63, the first gear 61, the second gear 62, and the lower pressing member 64) from the lower pressing member 64 side. Is screwed into the screw hole 32H (FIGS. 5 and 6) of the lower end 32T of the ball screw 32.

  4, 5, and 6, the pin member 66 extends in the Z-axis direction, and the upper end side is fixed to the upper pressing member 63. The portion of the pin member 66 that extends below the upper pressing member 63 penetrates the first gear 61, the second gear 62, and the lower pressing member 64 from above. The through hole of the pin member 66 provided in the second gear 62 is an arc-shaped long hole 62H centering on the center of the second gear 62 (FIG. 6).

  The plate member 67 is provided on the upper surface of the second gear 62. The plate member 67 is made of an elastic member. The material is not particularly limited, but here it is made of rubber. The plate member 67 is fixed to the second gear 62.

  The second gear 62 can move relative to the first gear 61 (relative rotation) within a range in which the pin member 66 can move in the arc-shaped elongated hole 62H. In FIG. 6, of both ends of the long hole 62H, an end portion on the side facing the upward rotation direction is a reference end D1, and an end portion on the side facing the downward rotation direction (arrow R shown in FIG. 6) is a regulation end D2. Called.

  As shown in FIGS. 7A and 8A, in the state where the pin member 66 is positioned at the reference end D1, the tooth TH of the second gear 62 moves up and down with the tooth TH of the first gear 61. The angle θ shown in FIG. 7A (θ is 9 to 10) in the downward rotation direction (arrow R shown in FIG. 7A) with respect to the tooth TH of the first gear 61. It is located at a position advanced by about (°). Hereinafter, the position of the second gear 62 with respect to the first gear 61 is referred to as a “reference position”.

  On the other hand, as shown in FIGS. 7B and 8B, in the state where the pin member 66 is positioned at the restriction end D2, the tooth TH of the second gear 62 is the same as the tooth TH of the first gear 61. Match. Hereinafter, such a position of the second gear 62 with respect to the first gear 61 is referred to as a “restricted position”.

  The second gear 62 is coupled to the lower end portion 32 </ b> T of the ball screw 32 by a coupling screw 65 together with the first gear 61 in a state of being in the “reference position”. Therefore, when the ball screw 32 (that is, the gear unit 51) rotates, the second gear 62 is integrated with the first gear 61 in a state where the tooth TH is shifted from the first gear 61 by the angle θ. Turns and turns.

  3A and 3B, the engagement unit 52 includes a unit base 71, an engagement body 72, an urging spring 73 (urging means), and a roller member 74. The unit base 71 is composed of a plate-like member extending in the YZ plane. As for the unit base 71, the flange part 71F of the lower end is attached to the upper surface 21K of the trolley | bogie 21 with the volt | bolt 71B.

  The engaging body 72 is made of a plate-like member. The engaging body 72 is disposed behind the unit base 71. The engaging body 72 is attached to the unit base 71 via a support shaft 72J whose left end extends in the vertical direction. The engagement body 72 is swingable in a direction in which the right end is moved back and forth with the support shaft 72J as a fulcrum.

  3A and 3B and FIGS. 7A and 7B, an engagement claw 72T is formed at the right end of the engagement body 72. The engaging claw 72T extends upward and is bent backward. The engaging claw 72T is located in front of the gear unit 51. At the right end of the engagement body 72, a detection protrusion 72S that protrudes forward and extends is provided.

  3A and 3B, the biasing spring 73 has one end side attached to the unit base 71 and the other end side attached to the engagement body 72. The urging spring 73 is a compression spring and urges the engagement claw 72T in a direction (referred to as an “engagement direction”, here, rearward) in which the engagement claw 72T is engaged with the first gear 61 and the second gear 62. .

  3A and 3B, a horizontal roller mounting portion 72R is provided on the upper edge of the intermediate portion in the Y-axis direction of the engaging body 72 so as to extend rearward. The roller mounting portion 72R is provided with a roller support shaft 74J extending in the Z-axis direction. The roller member 74 is attached to the roller support shaft 74J and is rotatable about the Z axis.

  As described above, the engaging body 72 is urged in the engaging direction (rearward) by the urging spring 73, whereby the roller member 74 is pressed against the transmission belt 33 from the front. In this state, the roller member 74 receives a repulsive force from the transmission belt 33, and the biasing spring 73 is in a compressed state. In this state, the engagement body 72 separates the engagement claw 72T forward from the gear unit 51. Such a position of the engaging body 72 is hereinafter referred to as a “non-engaging position”.

  When the transmission belt 33 is torn for some reason from such a state, the connection state between the drive shaft 31J and the ball screw 32 is released, and the storage body extraction portion 24 falls due to its own weight. The ball screw 32 rotates in the downward rotation direction (arrow R shown in FIG. 7A) as the storage body drawer 24 falls, and the gear unit 51 also rotates in the downward rotation direction.

  In addition, when the transmission belt 33 is torn, the roller member 74 does not receive a repulsive force from the transmission belt 33. For this reason, the engagement body 72 is positioned at the “engagement position” that is urged by the urging spring 73 and swings backward (arrow Y shown in FIGS. 7A and 8A). When the engagement body 72 is positioned at the “engagement position”, any of the plurality of teeth TH included in the second gear 62 is engaged with the engagement claw 72T (FIG. 7A). Here, not the tooth TH of the first gear 61 but the tooth TH of the second gear 62 is engaged with the engaging claw 72T because the tooth TH of the second gear 62 is the tooth TH of the first gear 61. This is because it protrudes in the downward rotation direction (the direction of the arrow R shown in FIG. 7A).

  When the tooth TH of the second gear 62 is engaged with the engaging claw 72T, the rotation of the second gear 62 is restricted and stopped. Even after the rotation of the second gear 62 is stopped, the rotation of the ball screw 32 in the downward rotation direction is continued, so that the first gear 61 rotates relative to the second gear 62 whose rotation has stopped. Then, the tooth TH of the first gear 61 is engaged with the engaging claw 72T. At this time, the tooth TH of the first gear 61 engaged with the engaging claw 72T is adjacent to the tooth TH of the second gear 62 previously engaged with the engaging claw 72T (shifted by an angle θ). It is.

  After the tooth TH of the first gear 61 is engaged with the engaging claw 72T, the pin member 66 in the long hole 62H is in a period until the tooth TH of the second gear 62 is engaged with the engaging claw 72T. The long hole 62H moves from the reference end D1 to the restriction end D2. When the pin member 66 comes into contact with the restriction end D2 of the long hole 62H, the second gear 62 is positioned at the “regulation position”, and the tooth TH of the first gear 61 and the tooth TH of the second gear 62 are Match up and down. In a state where the teeth TH of the first gear 61 and the teeth TH of the second gear 62 that are aligned vertically are engaged with the engaging claws 72T (FIGS. 7B and 8B), the gear unit 51 The rotation of the ball screw 32 in the descending rotation direction is restricted through the entirety, and the storage body drawer 24 is prevented from falling.

  3A and 3B, the sensor unit 53 includes a sensor base 53a and a sensor 53b. The sensor base 53a is composed of a plate-like member extending in the vertical direction, and the lower end is attached to the upper surface 21K of the carriage 21. The sensor 53b is provided on the rear surface of the sensor base 53a. The sensor 53b detects the detection protrusion 72S of the engagement body 72 located at the “non-engagement position”.

  The control unit determines that the engaging body 72 is in the “non-engagement position” when the sensor 53b detects the detection protrusion 72S, and the sensor 53b does not detect the detection protrusion 72S. Then, it is determined that the engagement body 72 is located at the “engagement position”. When it is determined that the engaging body 72 is in the “engagement position”, the control unit issues a warning to the operator OP that the transmission belt 33 has been torn through an alarm device (not shown).

  Here, after the second gear 62 is engaged with the engaging claw 72T, until the first gear 61 is engaged with the engaging claw 72T (the first gear 61 is in relation to the second gear 62). The first gear 61 and the second gear 62 move relative to each other while friction between the first gear 61 and the plate-like member 67 is limited by friction. . For this reason, elastic distortion occurs in the plate-like member 67, and the elastic distortion of the plate-like member 67 exerts a deceleration (braking) action on the first gear 61, so that the first gear 61 is engaged. When engaging with the claw 72T, the impact received by the first gear 61 from the engagement claw 72T is reduced.

  Here, the elastic member is the rubber plate-like member 67, but the elastic member may be a spring member. In the modification shown in FIGS. 9 and 10, two spring members 81 extending and contracting in the relative movement direction are disposed between the first gear 61 and the second gear 62. Here, each of the first gear 61, the second gear 62, and the lower pressing member 64 is provided with a spring accommodating opening SK, and a spring that is a compression spring in a space formed by these spring accommodating openings SK. A member 81 is installed. The spring member 81 is inserted into a spring insertion portion 62 </ b> S formed in the spring accommodating opening SK of the second gear 62. For this reason, the spring member 81 does not fall out of the spring accommodating opening SK.

  The spring accommodating openings SK provided in the first gear 61, the second gear 62, and the lower pressing member 64 are arranged so that they coincide with each other in the vertical direction with the second gear 62 positioned at the “reference position”. The position and dimension are set (FIG. 11A). In this state, no repulsive force is generated in the spring member 81, and when the second gear 62 moves from the “reference position” to the “restriction position”, the spring member 81 is compressed by the relative movement of the spring accommodating openings SK. Repulsive force is generated.

  When the transmission belt 33 is torn from such a state, the connection state between the drive shaft 31J and the ball screw 32 is released, and the storage body extraction portion 24 falls due to its own weight. Thereby, the ball screw 32 rotates in the downward rotation direction (arrow R shown in FIG. 11A), and the gear unit 51 also rotates in the downward rotation direction. When the engaging body 72 swings backward by the tearing of the transmission belt 33 (arrow Y shown in FIG. 11A) and engages with the tooth TH of the second gear 62, the second gear 62 rotates. As a result, the first gear 61 rotates relative to the second gear 62 (FIG. 11 (a) → FIG. 11 (b)).

  When the first gear 61 rotates relative to the second gear 62, the pin member 66 in the long hole 62H moves from the reference end D1 side of the long hole 62H to the restriction end D2. When the pin member 66 comes into contact with the restriction end D2 of the long hole 62H, the second gear 62 is positioned at the “regulation position”, and the teeth TH of the first gear 61 and the teeth TH of the second gear 62 are vertically moved. It matches (FIG. 11 (b)). In a state where the teeth TH of the first gear 61 and the teeth TH of the second gear 62 that are aligned vertically are engaged with the engaging claw 72T (FIG. 11B), the ball screw is passed through the entire gear unit 51. The rotation of 32 in the downward rotation direction is restricted, and the storage body drawer 24 is prevented from falling.

  Here, after the second gear 62 is engaged with the engaging claw 72T, until the first gear 61 is engaged with the engaging claw 72T (the first gear 61 is in relation to the second gear 62). During the relative rotation), the spring member 81 interposed between the first gear 61 and the second gear 62 is compressed to generate elastic distortion (FIG. 11B). Since the elastic distortion of the spring member 81 exerts a deceleration (braking) action on the first gear 61, the first gear 61 is engaged when the first gear 61 is engaged with the engaging claw 72T. The impact received from the claw 72T is reduced.

  As described above, the component supply device 13 according to the first embodiment (including the modified example) engages with the first gear 61 that rotates together with the ball screw 32 and the first gear 61 to pull out the storage body. An engagement body 72 is provided as an engagement body that prevents the ball screw 32 from rotating in the direction in which the portion 24 is lowered (downward rotation direction). Then, when the first gear 61 and the engagement body 72 serve as the rotation restricting mechanism 34 and the transmission belt 33 that transmits the rotational force of the drive motor 31 to the ball screw 32 is torn, the rotation of the ball screw 32 is prevented. It has a configuration to regulate. For this reason, even if the transmission belt 33 is torn, it is possible to prevent the storage body drawer portion 24 from falling, and to ensure work safety.

  Further, the rotation restricting mechanism 34 in the first embodiment (including the modified example) includes an urging spring 73 (urging means) that urges the engaging body 72 in a direction in which the engaging body 72 is engaged with the first gear 61, and an engaging body. And a roller member 74 that is pressed against the transmission belt 33 in a state in which the engaging body 72 is biased by the biasing spring 73. When the roller member 74 is pressed against the transmission belt 33, the engaging body 72 is separated from the first gear 61, the transmission belt 33 is torn and the roller member 74 is pressed against the transmission belt 33. When the state is released, the engaging body 72 urged by the urging spring 73 is engaged with the first gear 61. In the first embodiment, since the rotation restricting mechanism 34 having such a simple configuration is employed, the manufacturing cost can be reduced.

  In the first embodiment, the rotation restricting mechanism 34 rotates together with the ball screw 32, and the second gear 62 that engages with the engaging body 72 before the engaging body 72 engages with the first gear 61; A buffering means is provided that includes an elastic member that is interposed between the first gear 61 and the second gear 62 and prevents relative rotation of the first gear 61 with respect to the second gear 62. By this buffering means, when the first gear 61 is engaged with the engaging claw 72T, the impact received by the first gear 61 from the engaging claw 72T is reduced. In the above-described embodiment, the elastic member is a rubber plate-like member provided facing the joint surface between the first gear 61 and the second gear 62 or the first gear 61 and the second gear. Although it consists of the spring member 81 interposed between 62, other elastic members can also be used.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. FIG. 12 shows a rotation restricting mechanism 34 included in the component supply device according to the second embodiment. In FIG. 12, the rotation regulating mechanism 34 includes a drive side backup pulley 91 (first rotating body), a driven side backup pulley 92 (second rotating body), and a backup belt 93.

  The drive-side backup pulley 91 is connected to the drive shaft 31J of the drive motor 31, and is driven by the drive shaft 31J to rotate in the horizontal plane. The driven-side backup pulley 92 is connected to the lower end portion 32T of the ball screw 32 and rotates in the horizontal plane together with the ball screw 32. The backup belt 93 is stretched between the drive side backup pulley 91 and the driven side backup pulley 92.

  Here, the backup belt 93 is stretched with a tension lower than that of the transmission belt 33. For this reason, during normal times when the transmission belt 33 is not torn, no power is transmitted between the drive-side backup pulley 91 and the driven-side backup pulley 92, and the backup belt 93 rotates in synchronization with the drive-side backup pulley 91. And the driven-side backup pulley 92 are driven in a driven manner.

  When the transmission belt 33 is torn from such a state, the connection state between the drive shaft 31J and the ball screw 32 is released, and the storage body extraction portion 24 falls due to its own weight. As a result, the ball screw 32 rotates in the downward rotation direction, and the driven side backup pulley 92 is connected to the drive side backup pulley 91 via the backup belt 93. As a result, the ball screw 32 is connected to the drive shaft 31J, and the rotation of the ball screw 32 that accompanies the drop of the storage body extraction portion 24 is restricted, thereby preventing the storage body extraction portion 24 from falling. In the state where the driven-side backup pulley 92 is connected to the drive-side backup pulley 91 via the backup belt 93, the rough control of the rotation of the ball screw 32 by the drive motor 31 (that is, the raising and lowering of the storage body drawer 24). Is possible.

  As described above, in the component supply device 13 in the second embodiment described above, when the transmission belt 33 is torn, the rotational force of the drive motor 31 is transmitted to the ball screw 32 by the backup belt 93 provided in the rotation restriction mechanism 34. Thereby, the rotation of the ball screw 32 in the downward rotation direction is prevented. For this reason, even if the transmission belt 33 is torn, it is possible to prevent the storage body drawer portion 24 from falling, and to ensure work safety.

(Third embodiment)
FIGS. 13A and 13B show the rotation restricting mechanism 34 in the third embodiment. As in the case of the second embodiment, the rotation restricting mechanism 34 in the third embodiment is integrated with the drive-side backup pulley 91 (first rotating body) rotated by the drive motor 31 and the ball screw 32. However, the backup belt 93 is not provided. Instead, the plurality of first blade members 94 and the plurality of second blade members are provided. 95.

  Here, the plurality of first blade members 94 extend radially from the drive-side backup pulley 91 into the rotation plane of the drive-side backup pulley 91 (here, in the horizontal plane). The plurality of second blade members 95 extend radially from the driven-side backup pulley 92 into the rotation plane of the driven-side backup pulley 92 (here, in the horizontal plane).

  The first vane member 94 and the second vane member 95 are configured such that a trajectory (circular in a plan view) drawn by the tip of the first vane member 94 when the driving side backup pulley 91 rotates and a driven side backup pulley 92 The length is set so that the orbit (circular in plan view) drawn by the tip of the second blade member 95 partially overlaps when rotated. Further, the first blade member 94 and the second blade member 95 are not in contact with each other at the normal time when the transmission belt 33 is not torn. It arrange | positions so that it may mutually rotate independently (FIG. 13 (a), (b)).

  When the transmission belt 33 is torn from such a state, the connection state between the drive shaft 31J and the ball screw 32 is released, and the storage body extraction portion 24 falls due to its own weight. Thereby, the ball screw 32 rotates in the downward rotation direction, and the second blade member 95 engages with the first blade member 94. As a result, the ball screw 32 is connected to the drive shaft 31J, and the rotation of the ball screw 32 that accompanies the drop of the storage body extraction portion 24 is restricted, thereby preventing the storage body extraction portion 24 from falling. In the state where the second blade member 95 and the first blade member 94 are connected to the drive-side backup pulley 91 through the engagement of the second blade member 95 and the first blade member 94, the rotation of the ball screw 32 by the drive motor 31 (that is, the housing drawer portion 24). It is possible to roughly control the movement.

  Thus, in the component supply device 13 in the above-described third embodiment, when the transmission belt 33 is torn, the first blade member 94 and the second blade member 95 provided in the rotation restriction mechanism 34 are engaged, When the rotational force of the drive motor 31 is transmitted to the ball screw 32, the rotation of the ball screw 32 in the downward rotation direction is prevented. For this reason, it is possible to prevent the object to be lifted and lowered (the object to be lifted and lowered by the ball screw 32, here the storage body drawing portion 24) due to the tearing of the transmission belt 33, and to ensure the safety of the work.

  Although the embodiments of the present invention have been described so far, the present invention is not limited to the above-described ones, and various modifications are possible. For example, in the first embodiment described above, the plate-like member 67 is provided in the second gear 62, but may be provided in the first gear 61, and the first gear 61 and the second gear 62 may be provided. It may be provided on both of the gears 62. That is, the plate-like member 67 only needs to be provided facing the joint surface between the first gear 61 and the second gear 62.

  Further, although the spring member 81 used in the modification of the first embodiment described above is a compression spring, the rotation restricting mechanism 34 can be configured by using this as a tension spring. In the first, second and third embodiments described above, the elevating mechanism 25 elevates and lowers the storage body drawer 24. However, the magazine 23 may be elevated. In this case, the object to be lifted and lowered by the ball screw 32 becomes the magazine 23, and the magazine 23 is prevented from dropping due to the tearing of the transmission belt 33 according to the present invention.

  Provided is a component supply device capable of preventing a lifting object from falling due to a tear of a transmission belt.

DESCRIPTION OF SYMBOLS 13 Parts supply apparatus 22 Parts storage body 23 Magazine 24 Storage body drawer | drawing-out part 25 Elevating mechanism 31 Drive motor 32 Ball screw 33 Transmission belt 34 Rotation restriction mechanism 61 1st gear 62 2nd gear 67 Plate-shaped member (elastic member)
72 Engagement body 73 Biasing spring (Biasing means)
74 Roller member 81 Spring member (elastic member)
91 Drive-side backup pulley (first rotating body)
92 Driven-side backup pulley (second rotating body)
93 Backup belt 94 First blade member 95 Second blade member PT Parts

Claims (8)

A magazine for retractably storing a component storage body in which components are stored, a storage body drawer portion for pulling out the component storage body from the magazine, and an elevating mechanism for raising and lowering the storage body drawer portion relative to the magazine A component supply device comprising:
The lifting mechanism is
A drive motor that generates rotational force;
A ball screw that moves up and down the storage body drawer or the magazine by rotating around a vertical axis;
A transmission belt for transmitting the rotational force generated by the drive motor to the ball screw to rotate the ball screw;
A component supply device comprising: a rotation restricting mechanism for restricting rotation of the ball screw when the transmission belt is torn.   The rotation restricting mechanism prevents a rotation of the first screw that rotates integrally with the ball screw and the rotation of the ball screw in a direction that engages with the first gear and lowers the housing drawer part. The component supply apparatus according to claim 1, further comprising an engagement body.   The rotation restricting mechanism includes a biasing unit that biases the engagement body in a direction to engage the first gear, and a state in which the engagement body is biased by the biasing unit. And a roller member pressed against the transmission belt, and in a state where the roller member is pressed against the transmission belt, the engagement body is separated from the first gear, and the transmission belt is torn. 3. The component supply according to claim 2, wherein when the state where the roller member is pressed against the transmission belt is released, the engaging body biased by the biasing means is engaged with the first gear. apparatus.   The rotation restricting mechanism rotates together with the ball screw, the second gear engaged with the engaging body before the engaging body engages with the first gear, the first gear, and the second gear. The component supply device according to claim 3, further comprising: a buffer unit that is interposed between the first gear and the second gear, and includes an elastic member that prevents relative rotation of the first gear with respect to the second gear.   The component supply device according to claim 4, wherein the elastic member is a rubber plate-like member provided to face a joint surface between the first gear and the second gear.   The component supply device according to claim 4, wherein the elastic member is a spring member interposed between the first gear and the second gear.   The rotation regulating mechanism includes a first rotating body that is rotated by being driven by the drive motor, a second rotating body that rotates integrally with the ball screw, the first rotating body, and the second rotating body. The component supply device according to claim 1, further comprising a backup belt stretched between the rotating bodies with a tension lower than that of the transmission belt.   The rotation restricting mechanism includes a first rotating body that is rotated by being driven by the drive motor, a second rotating body that rotates together with the ball screw, and the first rotating body to the first rotating body. A first blade member extending radially in the rotating surface of the rotating body; and a first blade member extending radially from the second rotating body in the rotating surface of the second rotating body; The component supply apparatus of Claim 1 provided with the 2nd blade member engaged with the 1 blade member.

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