JP2006066789A - Substrate fixing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a substrate fixing device which applies optimal substrate holding force corresponding to various substrate thicknesses and enables easy adjustment operation thereof. <P>SOLUTION: In the substrate fixing device, a carrying rail 3 rises as a fitting board 23 rises and the substrate 4. The fixing device is held by a fixing member 16 and the carrying rail 3, has an adjusting shaft 18 which is mounted on the bottom side of the carrying rail 3 and can adjust the vertical height by turn of a screw, and adjusts the rising position of the carrying rail 3 involved in the rise of the fitting plate 23 by adjusting the vertical height of the adjusting shaft 18. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a substrate fixing device that holds a substrate at a predetermined position.

  Conventionally, electronic component mounting apparatuses for mounting electronic components on a substrate have been proposed. The electronic component mounting apparatus is provided with a board fixing device that fixes a board moving in one horizontal direction along the transport rail at a predetermined position. There exists Unexamined-Japanese-Patent No. 2003-110294 (patent document 1) as an example of a board | substrate fixing device. The substrate fixing device includes a rising restricting member 34 fixedly disposed on the upper surface side of the substrate, a support plate 33 supported on the lower surface side of the substrate so as to be vertically movable, a support bar 33a provided on the lower surface of the support plate 33, and a support. A back-up plate 31 that can move up and down is provided on the lower surface of the bar 33a.

  When the backup plate 31 rises, the backup plate 31 comes into contact with the support bar 33a and raises the support plate 33. The support plate 33 and the rise restricting member 34 hold the substrate 12 at a predetermined position.

JP2003-110294 (FIG. 2)

  However, the substrate fixing device of Patent Document 1 adjusts the length of the support bar 33a extending downward from the support plate 33 to provide an optimum substrate holding force corresponding to various substrate thicknesses. The granting is not specified.

  The present invention has been made to solve the above-described problems, and provides a substrate fixing device that provides an optimum substrate holding force corresponding to various substrate thicknesses and that can be easily adjusted. The purpose is to do.

In order to solve the above problem, the invention according to claim 1
A substrate (4) movable in one horizontal direction by a conveyor belt;
A fixing member (16) fixed to the upper surface side of the substrate;
A transport rail (3) disposed on the lower surface side of the substrate and supported so as to be movable up and down with respect to the machine frame;
An engagement plate (23) disposed below the transport rail and moving up and down with respect to the substrate;
In the substrate fixing apparatus that holds the substrate with the fixing member and the transport rail, the transport rail rises as the engagement plate rises.
An adjustment shaft (18) that is attached to the bottom surface side of the transport rail and that can adjust the vertical height by turning the screw portion,
The substrate fixing apparatus, wherein the height of the conveying rail is adjusted as the engaging plate is raised by adjusting the vertical height of the adjusting shaft.

A second aspect of the present invention is the substrate fixing apparatus according to the first aspect,
The adjustment shaft is attached to the bottom side of the transport rail, and a first adjustment shaft (19) capable of adjusting the vertical height;
A substrate fixing apparatus comprising: a second adjustment shaft (20) which is attached to a lower end portion of the first adjustment shaft and is capable of adjusting a vertical height by a screw portion to be screwed.

  According to the first aspect of the present invention, the adjustment shaft 18 is rotated to adjust the vertical height of the adjustment shaft 18 to adjust the lift position of the transport rail as the engagement plate 23 is lifted. For this reason, the optimum substrate holding force can be applied in accordance with various substrate thicknesses, and the adjustment work can be facilitated to shorten the work time.

According to invention of Claim 2, the 2nd adjustment axis | shaft 20 is rotated and the height is adjusted.
Further, for example, if the first adjustment shaft 19 is moved up and down to roughly adjust the vertical height, and the second adjustment shaft 20 is rotated to finely adjust the vertical height, the adjustment work is easy. Thus, the working time can be further reduced.

1st Embodiment of this invention is described based on FIG.1, FIG.2, FIG.3.
1 is a perspective view of the electronic component mounting apparatus, FIG. 2 is a front view of the board fixing apparatus, and FIG. 3 is a side view of the board fixing apparatus. In the following description, the direction in which the substrate 4 is transported in the horizontal plane is defined as the left-right direction, the direction perpendicular to the horizontal direction in the horizontal plane is defined as the front-rear direction, and the direction orthogonal to the horizontal plane is defined as the vertical direction.

  An electronic component mounting apparatus 1 for mounting electronic components on a board is provided with a pair of transport rails 3 along one horizontal direction (left-right direction) of the machine frame 2. The substrate 4 is transported in the left-right direction along the pair of transport rails 3. A pair of Y frames 8 is placed on the machine frame 2 so as to straddle the transport rail 3 along the front-rear direction. The guide rails 5 are individually fixed to the upper part of the Y frame 8.

  An X frame 6 is disposed on the upper part of the pair of guide rails 5 along the left-right direction. The X frame 6 is provided with a linear motion guide with a bearing (not shown) at both ends thereof. The guide rail 5 engages with the linear motion guide, and supports the X frame 6 so as to be movable along the front-rear direction. The Y frame 8 is equipped with a pair of pulleys and a belt 9 wound around the pulleys. As the Y-direction motor 10 rotates, the X frame 6 moves in the front-rear direction via the pulley and the belt 9.

  A guide rail (not shown) is fixed to one side surface of the X frame 6. The mounting head 7 is disposed so as to cover a part of the guide rail. The mounting head 7 is mounted with a linear motion guide with a bearing (not shown) on the back side thereof. A guide rail engages with the linear motion guide to support the mounting head 7 so as to be movable in the left-right direction. The X frame 7 is equipped with a pair of pulleys (not shown) and a belt wound around the pulleys. As the X-direction motor 11 rotates, the mounting head 7 moves in the left-right direction via a pulley and a belt.

  The mounting head 7 is provided with a suction nozzle 8. The mounting head 7 includes driving units that move the suction nozzle 8 up and down and rotate. A tape feeder 12 that individually supplies electronic components is provided on the front side in the front-rear direction of the machine casing 2.

  As shown in FIG. 2, the electronic component mounting apparatus 1 includes a substrate fixing device 13 that conveys the substrate 4 and fixes it at a predetermined position. The right side portion of the substrate fixing device 13 in FIG. 2 is omitted because it is bilaterally symmetric, but the roller 14, the adjustment shaft 18 and the like are also provided on the right side portion.

  A pair of pulleys 14 are attached to both ends of the pair of left and right transport rails 3. An endless belt (conveying belt) 15 is wound around these pulleys 14. The belt 15 is guided to the groove 3a of the transport rail. The groove portion 3a is formed by a support portion 3b that supports the belt 15 on the lower surface thereof, and a guide portion 3c disposed on the upper surface of the support portion 3b.

  The bottom surface of the guide portion 3c covers one end of the belt 15, and one side surface of the guide portion 3c engages with the side surface of the substrate, thereby guiding the substrate 4 along the left-right direction. The guide portion 3c is disposed so as to be recessed by a predetermined amount from the support portion 3b.

  When the substrate transport motor (not shown) is driven, the pulley 14 and the belt 15 rotate to transport the substrate 4 along the left-right direction.

  A fixing member 16 is disposed on the upper surface side of the substrate 4 to be conveyed along the left-right direction. The fixing member 16 is fixed to the frame (machine frame) 2 and is arranged so that a part thereof covers an end portion of the upper surface of the substrate 4 when viewed from above.

  On the lower surface side of the substrate 4 and on the lower surface of the belt 15, a support portion 3 b of the transport rail 3 is provided. The pair of transport rails 3 can adjust the width in the front-rear direction according to the width of the substrate 4. The transport rail 3 is provided with a guide shaft (not shown) along the vertical direction. The guide shaft is supported by a slide bearing fixed to a machine frame (not shown). For this reason, the transport rail 3 is supported by the machine casing 2 so as to be movable along the vertical direction.

  An adjustment shaft 18 extending downward is provided on the bottom surface of the transport rail 3. The adjustment shaft 18 includes an upper first adjustment shaft 19 and a lower second adjustment shaft 20.

  The first adjustment shaft 19 is a rod-like member, and is composed of an upper body portion 19a and a screw portion 19b formed with a lower male screw. The main body 19a engages with a support hole 3d formed on the bottom surface of the transport rail 3, and is fixed by a set screw 17 at a predetermined position.

  The second adjustment shaft 20 is a rod-shaped member, and has a female screw 20a formed downward from the upper end side. The lock screw 21 and the second adjustment shaft 20 are screwed into the screw portion 19b of the first adjustment shaft 19 in order. When the second adjustment shaft 20 is positioned at a predetermined position, the lock screw 21 is tightened to fix the vertical position.

  A backup plate (engagement plate) 23 is disposed below the second adjustment shaft 20 at a position spaced a predetermined amount from the lower end of the second adjustment shaft 20. The backup plate 23 is a plate-like member and moves up and down by a drive device such as an air cylinder (not shown). In a predetermined position of the backup plate facing the lower end of the second adjustment shaft 20, a pillow portion 22 having a perfect circle shape is fixed in a side view. The pillow part 22 is provided to make a point contact with the second adjustment shaft 20 with certainty.

The operation of the substrate fixing device 13 of the first embodiment will be described.
First, the substrate 4 is placed on the belt 15.
Next, when the substrate transport motor is driven, the pulley 14 and the belt 15 rotate to transport the substrate 4.
Next, when the board 4 is transferred to the component mounting position, the driving of the board transfer motor is stopped.
Next, the air cylinder rises and the backup plate 23 rises.
Next, the pillow portion 22 of the backup plate comes into contact with the second adjustment shaft 20, and the transport rail 3 rises through the second adjustment shaft 20 and the first adjustment shaft 19.

Next, as the transport rail 3 rises, the support portion 3b and the belt 15 rise.
Then, the upper surface of the raised substrate 4 comes into contact with the fixing member 16. The upper surface of the substrate 4 is held by the fixing member 16, and the lower surface thereof is held by the belt 15 and the support portion 3 b of the transport rail 3.
Next, when the mounting head 7 mounts the electronic components and the mounting operation is completed, the holding of the substrate is released and the substrate 4 is transported.

  When the substrate thickness is changed, after loosening the lock screw 21, the second adjustment shaft 20 is rotated to adjust its height position, and then tightened with the lock screw 21. Alternatively, after loosening the set screw 17, the first adjustment shaft 19 is moved up and down to adjust its height position, and then the set screw 17 is tightened.

  According to the board | substrate fixing apparatus of 1st Embodiment, the 2nd adjustment axis | shaft 20 is rotated, the up-and-down height is adjusted, and the raising position of the conveyance rail 3 is adjusted. For this reason, the optimal substrate holding force can be provided corresponding to various substrate thicknesses. Further, since the vertical height is adjusted by the rotation of the second adjustment shaft 20, the adjustment work becomes easy and the work time can be shortened.

  Further, the transport rail support hole 3d to which the first adjustment shaft 19 is attached has a sufficient depth to adjust the height, so that the first adjustment shaft 19 is slid in the vertical direction. If the fine adjustment is performed by rotating the second adjustment shaft 20 while performing the coarse adjustment, the adjustment work is facilitated, and the work time can be further shortened.

The present invention is not limited to the first embodiment and can be variously modified.
For example, in the first embodiment, the adjustment shaft 18 is divided into the first adjustment shaft 19 and the second adjustment shaft 20, but instead, the adjustment shaft is integrated and the upper side is threaded. Then, a female screw is formed in the support hole of the transport rail. Then, it can be easily considered that the screw of the adjusting shaft is screwed into the screw hole of the transport rail and fixed with a lock nut at a predetermined position.

  In the first embodiment, the vertical height is adjusted by forming a male screw on the first adjustment shaft and a female screw on the second adjustment shaft, but the female screw on the first adjustment shaft and the male screw on the second adjustment shaft. It is also conceivable to form

It is a perspective view of an electronic component mounting apparatus. It is a front view of a substrate fixing device. It is a side view of a board | substrate fixing device.

Explanation of symbols

4 ... Substrate 15 ... Conveyor belt
16. ・ Fixing member 3 ・ ・ ・ Conveying rail 23 ・ ・ Engagement plate (backup plate)
18. Adjustment shaft 19 First adjustment shaft 20 Second adjustment shaft

Claims (2)

A substrate movable in one horizontal direction by a conveyor belt;
A fixing member fixed to the upper surface side of the substrate;
A transport rail disposed on the lower surface side of the substrate and supported so as to be vertically movable with respect to the machine frame;
An engagement plate disposed below the transport rail and moving up and down with respect to the substrate;
In the substrate fixing apparatus that holds the substrate with the fixing member and the transport rail, the transport rail rises as the engagement plate rises.
It is mounted on the bottom side of the transport rail, and includes an adjustment shaft that can adjust the vertical height by rotating the screw part,
The substrate fixing apparatus, wherein the height of the conveying rail is adjusted as the engaging plate is raised by adjusting the vertical height of the adjusting shaft. The substrate fixing apparatus according to claim 1, wherein
The adjustment shaft is attached to the bottom surface side of the transport rail, and a first adjustment shaft capable of adjusting the vertical height;
A substrate fixing apparatus comprising: a second adjustment shaft that is attached to a lower end portion of the first adjustment shaft and can be adjusted in height by a screw portion that is screwed together.

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