JP6585398B2 - Mobile device - Google Patents

Description

The present invention relates to a movable device that transmits a driving force from both left and right sides to perform linear movement.

  An electronic component supply apparatus for supplying electronic components is used in an electronic component mounting machine that mounts electronic components on a circuit board. In the electronic component supply device, for example, a plurality of tray pallets containing electronic components are stored in a magazine, and a predetermined tray pallet is sent out to the mounting machine side by positioning by raising and lowering the magazine. is there. Patent Document 1 below discloses such a tray-type electronic component supply device. The tray-type electronic component supply device has two magazines arranged vertically that can be moved up and down independently, and each magazine can be loaded and unloaded with a tray pallet containing electronic components in a plurality of slots. It is installed.

  The magazine placed in the main body box is incorporated so as to be slidable up and down by rails arranged on both the left and right sides. Further, the magazine is provided with a ball screw mechanism in which nut members are fixed on both left and right sides and screwed with screw shafts provided upright on both the left and right sides in the main body box. Rotation from one motor is transmitted to the left and right screw shafts via a timing belt and a pulley, and the magazine is lifted and lowered by receiving driving force from both the left and right sides through the screw shafts rotating simultaneously. Yes.

JP 2011-091350 A

  The tray-type electronic component supply apparatus of the conventional example can be smoothly moved up and down as compared with the transmission of the driving force only on one side by transmitting the driving force to the magazine from both the left and right sides. However, this movable device that transmits driving force from one drive source to both the left and right sides is configured so that the movements of the ball screw mechanisms provided on the left and right sides are synchronized, but there is a slight shift in assembly error and transmission of driving force. As a result, some vibrations occur in the up-and-down movement of the magazine. In the case of handling a fine electronic component such as a tray-type electronic component supply device, the electronic component in the tray pallet is displaced due to vibration and affects the subsequent mounting on the circuit board. . On the other hand, it is difficult to synchronize completely, and there is a problem that it is expensive to execute.

  In view of the above, an object of the present invention is to provide a movable device that absorbs a shift generated in the left and right drive transmission mechanisms in order to solve such a problem.

The movable device according to the present invention includes a movable base slidably mounted on rail members arranged on both the left and right sides, a driving means for moving the movable base along the rail member, and the movable A drive transmission mechanism provided on both the left and right sides of the table for converting the drive force output from the drive means into the movement of the movable table; and the drive force of the drive means for the drive transmission mechanisms on the left and right sides A right and left transmission mechanism for transmitting simultaneously, and the movable base has a right side wall and a left side wall connected to the rail member and the drive transmission mechanism, respectively, and each moves along the rail member. a possible, the right side wall portion and the left side wall portion are those which are connected by elastic plates.

  According to the movable device of the present invention, the movable base moves along the rail member because the right side wall and the left side wall transmit the driving force from the driving means via the drive transmission mechanism and the left and right transmission mechanism. . At that time, since the right side wall part and the left side wall part are configured in a separated state, or are connected by an elastic plate, the deviation generated in the left and right transmission mechanism is absorbed, and each of the right side wall part and the left side wall part receives. The driving force is not transferred to each other and becomes independent movement.

It is the front view which showed the tray type | mold electronic component supply apparatus which is one Embodiment of a movable apparatus. It is the side view which simplified and showed the internal structure of the tray type | mold electronic component supply apparatus. It is the perspective view which showed the internal structure of the tray type | mold electronic component supply apparatus.

  Next, an embodiment of a movable device according to the present invention will be described below with reference to the drawings. The movable device of the present embodiment is configured in a tray type electronic component supply device of an electronic component mounting machine that mounts electronic components on a circuit board. The electronic component mounting machine is for mounting electronic components on a circuit board. It is a board production line that combines a screen printing machine that prints cream solder on a circuit board through a printed pattern and an inspection machine that inspects the printed state. Part of it. The tray-type electronic component supply apparatus supplies electronic components to the electronic component mounting machine in such a board production line.

  FIG. 1 is a front view showing a tray type electronic component supply device, and FIG. 2 is a side view showing a simplified internal structure of the tray type electronic component supply device. The tray-type electronic component supply device (hereinafter simply referred to as “component supply device”) 1 of the present embodiment has an upper magazine 2 and a lower magazine 3 for storing a plurality of tray pallets arranged in two upper and lower stages in the main body box 11. Are arranged so that each moves up and down independently. The main body box 11 is provided with an upper door 12 and a lower door 13 on the front surface, and corresponds to the upper magazine 2 and the lower magazine 3, respectively. The upper door 12 and the lower door 13 can be opened and closed by a handle 15 and the inside can be confirmed from the window 16. An operation input unit 17 and the like are provided on the front surface of the main body box 11.

  On the other hand, a drawer table 18 is provided on the back side of the main body box 11. The tray pallets 5 mounted on the upper magazine 2 and the lower magazine 3 are aligned in the height direction with respect to the drawing table 18 and are drawn onto the drawing table 18 by a pallet loading / unloading mechanism. The pulled-out tray pallet 5 is sent to the electronic component supply position, and the electronic component is taken out by the mounting head of the electronic component mounting machine. Therefore, the component supply device 1 is provided with an elevating mechanism that allows the upper magazine 2 and the lower magazine 3 to be aligned with the drawer table 18.

The upper magazine 2 and the lower magazine 3 have independent lifting mechanisms. FIG. 3 is a perspective view showing the internal structure of the component supply apparatus 1. Upper magazine 2, side wall members 21L opposed to the left and right sides, 21R is, the side wall member 31L is below the magazine 3, 31R are provided at the same height, respectively, the side wall members 21L, 21R, 31L, 31R of the inner slot 41 is formed in a plurality of stages in the vertical direction. Therefore, the side wall members 21L and 21R or the side wall members 31L and 31R can horizontally insert and remove the tray pallet 5 (see FIG. 2) between the slots 41 having the same height. In the present embodiment, the illustrated X-axis direction is the left-right width direction of the component supply device 1, the Y-axis direction is the front-rear direction, and the Z-axis direction is the height direction. Therefore, the tray pallet 5 is inserted into and removed from the upper and lower magazines 2 and 3 from the front and rear directions.

  Side wall members 21L, 21R, 31L and 31R have guide blocks 42 fixed to the outside, and the guide blocks 42 are slidable with respect to guide rails 43 fixed to the inner side wall of main body box 11 (see FIG. 2). It is fitted. Two guide rails 43 are fixed to the left and right sides in the vertical direction, and upper and lower side wall members 21L and 31L are attached to the same guide rail 43 on the left side, and upper and lower side wall members 21R and 31R are the same on the right side. A guide rail 43 is attached. The side wall members 21L, 21R, 31L, and 31R assembled so as to be able to move up and down are provided with a drive transmission mechanism that transmits a driving force for moving up and down.

  First, the upper magazine 2 (side wall members 21L and 21R) is provided with a drive motor 22, and the lower magazine 3 (side wall members 31L and 31R) is provided with a drive motor 32. The magazine 3 is configured to move up and down separately. The drive transmission mechanisms of the upper and lower magazines 2 and 3 have the same configuration, and ball screw mechanisms are provided on the left and right sides, and driving force is applied to the side wall members 21L and 21R of the upper magazine 2 and the side wall members 31L and 31R of the lower magazine 3, respectively. It has come to be communicated. This is because a magazine equipped with a plurality of tray pallets is heavy, and a cantilever structure in which driving force is transmitted only to one side prevents smooth vertical movement due to the twisting of the sliding part. .

  Regarding the transmission of the driving force to the left and right sides, for example, a dual structure in which two drive motors are provided on both the left and right sides can be considered. However, if the number of motors increases, the cost increases. In the component supply apparatus 1 according to this embodiment having the number of motors, the number of motors is four. Therefore, a configuration is adopted in which ball screw mechanisms are provided on the left and right sides, and the driving force of each of the drive motors 22 and 32 is transmitted to each ball screw. The structure of the upper magazine 2 will be described. The screw shafts 23L and 23R are provided in the vertical direction on the left and right, the nut member 24L fixed to the side wall member 21L is screwed to the screw shaft 23L, and the nut fixed to the side wall member 21R. The member 24R is screwed onto the screw shaft 23R.

  The rotational axis of the drive motor 22 is coaxially connected to the screw shaft 23L via a coupling. Further, pulleys 25L and 25R are fixed to the screw shafts 23L and 23R, respectively, and a timing belt 26 is stretched between them. A tension roller 27 is pressed against the timing belt 26. Therefore, the rotational output of the drive motor 22 is directly transmitted to the screw shaft 23L, and is transmitted to the screw shaft 23R via the pulleys 25L and 25R and the timing belt 26. The rotation of the screw shafts 23L and 23R is synchronized, and the rotational motion is converted into linear motion via the nut members 24L and 24R, respectively, and the side wall members 21L and 21R are moved up and down.

  Such a configuration is the same in the lower magazine 3. That is, the screw shafts 33L and 33R are provided on the left and right in the vertical direction, the nut member 34L fixed to the side wall member 31L is screwed to the screw shaft 33L, and the nut member 34R fixed to the side wall member 31R is connected to the screw shaft 33R. It is screwed. The rotation shaft of the drive motor 32 is coupled to the screw shaft 33L via a coupling, and the timing belt 36 to which the tension roller 37 is applied is stretched over the pulleys 35L and 35R fixed to the screw shafts 33L and 33R. Has been. Therefore, the rotational output of the drive motor 32 is directly transmitted to the screw shaft 33L, and is transmitted to the screw shaft 33R via the pulleys 35L and 35R and the timing belt 36. Then, the rotations of the screw shafts 33L and 33R are synchronized, and the rotational motion is converted into linear motion by the nut members 34L and 34R, and the side wall members 31L and 31R are moved up and down.

Thus, the upper magazine 2 is configured such that the rotational output of the drive motor 22 is simultaneously transmitted to the left and right screw shafts 23L and 23R, and the elevation of the side wall members 21L and 21R is synchronized (the same applies to the lower magazine 3). ). However, in the left and right ball screw mechanisms that convert the rotary motion into a linear motion, the position of the groove during operation in the combination of the screw shaft 23L and the nut member 24L and the combination of the screw shaft 23R and the nut member 24R are completely the same. Do not mean. Further, a slight error also occurs in the rotation transmitted through the timing belt 26, and complete synchronization is difficult. On the other hand, even if an adjustment that eliminates a slight error and synchronizes at a very high level is performed, such an adjustment is performed individually for each device, so that not only the work burden increases but also the accuracy increases. It is unstable.

  Such a configuration in which the driving force output from the one driving means is synchronized as the movement of the pair of movable members via the two drive transmission mechanisms is particularly high in the component supply apparatus 1 as in this embodiment. A slight movement error caused by this affects the parts supply. That is, since the component supply device having a conventional structure is a magazine having a structure in which, for example, the side wall members 21L and 21R are rigidly connected by the top plate and the bottom plate, the left and right movement errors at the time of raising and lowering appear as vibrations. This causes a position shift of the electronic component by, for example, jumping the component on the tray pallet. Then, the posture of the electronic component attracted and held by the mounting head becomes in an inappropriate state, and the electronic component determined to be incompatible by the inspection becomes a target for disposal.

  Therefore, it was a problem how to prevent vibration from being applied to the electronic components. However, as mentioned above, it is difficult to achieve perfect synchronization to match the state of raising and lowering on the left and right, and the problem can be solved by increasing the number of drive motors. This is not preferable because it leads to an increase in cost and an increase in the size of the apparatus. Therefore, in the present embodiment, it is configured to suppress the vibration that reaches the tray pallet 5 on the assumption that a movement error occurs in the left and right side wall members 21L and 21R. That is, force transmission due to a movement error is not performed between the side wall members 21L and 21R. The side wall members 31L and 31R of the lower magazine 3 have the same configuration.

  Specifically, the side wall members 21L and 21R are connected to each other by a top plate 45 and a bottom plate 46 as in the conventional structure. However, the top plate 45 and the bottom plate 46 are made of a plate material that can be extremely thin. . That is, even if a movement error occurs between the side wall members 21L and 21R, a configuration is adopted in which the deviation is absorbed by the top plate 45 and the bottom plate 46 being bent. For example, in the conventional magazine, an aluminum plate having a thickness of about 6 mm is used for the top plate and the bottom plate, but the top plate 45 and the bottom plate 46 of the upper and lower magazines 2 and 3 of this embodiment are 0.5 mm to 1 mm. An aluminum plate of about 0 mm is used.

  By the way, in the present embodiment, the ultra-thin top plate 45 and the bottom plate 46 are used as the problem solving means. However, these are not particularly necessary for the upper and lower magazines 2 and 3 to perform their original functions. Absent. This is because even if the top plate 45 and the bottom plate 46 are not present, the raising and lowering of the left and right side wall members 21L and 21R are synchronized, so that the tray pallet 5 inserted into the slot 41 can be raised and lowered. In the present embodiment, the top plate 45 and the bottom plate 46 are provided. For example, the top plate 45 prevents the electronic components on the tray pallet 5 from being contaminated by grease or the like due to the operation of the component mounting machine. This is because the bottom plate 46 prevents the hand from extending to the moving lower magazine 3 when the operator is working on the upper magazine 2.

  Thus, the top plate 45 and the bottom plate 46 are provided for purposes other than the movement of the tray pallet 5. Therefore, in the present embodiment, an extremely thin plate material is used so that the top plate 45 and the bottom plate 46 serve their respective purposes, while absorbing movement errors occurring in the side wall members 21L and 21R. Further, the movable base of the present embodiment includes left and right side wall members 21L. The upper and lower magazines 2 and 3 to which 21R is connected have been described. However, as described above, the upper and lower magazines 2 and 3 are configured to serve their respective purposes. Therefore, the side wall member 21L. The structure for connecting 21R is not essential, and a magazine having a structure in which the left and right side wall members 21L, 21R without a connecting member are separated may be used.

  Therefore, according to the component supply device 1 of the present embodiment, the upper magazine 2 is rotated by a predetermined angle to the screw shaft 23R by the screw shaft 23L and the timing belt 26 by the rotation control of the drive motor 22, and the rotational movement thereof. Are converted into linear motions by the nut members 24L and 24R, respectively, and the side wall members 21L and 21R move by a predetermined distance in the vertical direction. At that time, the target tray pallet 5 inserted into the upper magazine 2 is aligned with the height of the drawer table 18, and the drawn tray pallet 5 is moved to the electronic component supply position. The electronic parts used for mounting are taken out from the above. The lower magazine 3 is used, for example, as a stock of frequently used electronic components. When a specific electronic component in the upper magazine 2 is lost, the tray pallet 5 is similarly aligned with the height of the drawer table 18. Thus, the vertical movement is performed.

  In the operation of the upper magazine 2 (the same applies to the lower magazine 3), although the movements of the left and right side wall members 21L and 21R are synchronized, there is some movement error as described above. However, in this embodiment, the shift of the side wall members 21L and 21R is absorbed by the top plate 45 and the bottom plate 46 being bent. Therefore, the side wall members 21L and 21R are moved independently, and are not affected by each other, so that no vibration is generated. Therefore, the electronic components on the tray pallet 5 can be moved in a stable state, and component disposal due to a suction error by the mounting head can be reduced. Further, since the configuration allows the movement error, the effect can be achieved without incurring costs.

As mentioned above, although one Embodiment of the movable device of this invention was described, this invention is not limited to this, A various change is possible in the range which does not deviate from the meaning.
For example, in the above embodiment, the tray type electronic component supply device used in the electronic component mounting machine has been described as an example, but other movable devices may be used. The tray-type electronic component supply device 1 may also have a single magazine.
In the above-described embodiment, the ball screw mechanism is shown as the drive transmission mechanism, and the configuration using the timing belt and the pulley is shown as the left and right transmission mechanism. For example, these configurations may be a gear and a chain.

DESCRIPTION OF SYMBOLS 1 ... Tray type electronic component supply apparatus 2 ... Upper magazine 3 ... Lower magazine 5 ... Tray pallet 21L, 21R ... Side wall member 22 ... Drive motor 23L, 23R ... Screw shaft 24L, 24R ... Nut member 25L, 25R ... Pulley 26 ... Timing Belt 27 ... Tension roller 41 ... Slot 42 ... Guide block 43 ... Guide rail 45 ... Top plate 46 ... Bottom plate

Claims (3)

A movable base slidably mounted on rail members arranged on the left and right sides;
Driving means for moving the movable table along the rail member;
A drive transmission mechanism which is provided on both the left and right sides of the movable table, and converts the driving force output from the driving means into the movement of the movable table;
In a movable device having a left and right transmission mechanism for simultaneously transmitting the driving force of the driving means to the left and right drive transmission mechanisms,
The movable base has a right side wall and a left side wall connected to the rail member and the drive transmission mechanism, respectively, and is movable along the rail member. the movable device which is characterized in that which has been joined by the elastic plate.   The movable device according to claim 1, wherein the elastic plate is a thin plate that absorbs a shift in a moving direction between the right side wall and the left side wall by bending. The movable base is formed with a pair of slots in the horizontal direction on the inner side surface of the right side wall and the left side wall facing each other,
The rail member is a guide rail that is formed in a vertical direction and in which a guide block that is fixed to an outer surface of the right side wall and the left side wall is slidably fitted.
The drive transmission mechanism is a ball screw mechanism including a nut fixed to the outer side surface of the right side wall and the left side wall, and a screw shaft that is rotatably installed in a vertical direction.
2. The left and right transmission mechanism is configured to transmit a rotation of a motor, which is the driving means, by a belt being wound around a sprocket fixed to the screw shaft arranged on the left and right. Item 3. The movable device according to Item 2.

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