JPS61293738A - Circuit board retaining device - Google Patents

Abstract

PURPOSE:To enable the application of a production system coping with the change of circuit board dimensions by providing a means for adjusting the span of rails supporting the board, and changing a space between a base holder and a slide holder automatically and at a plurality of positions simultaneously. CONSTITUTION:A spline shaft 26 is so provided as to be freely rotatable along and in parallel with rails 19 and 20. Also, a plurality of base holders 27 and 28 to be fixed to said spline shaft 26 and a plurality of slide holders 29 and 30 as slidable on said shaft 26 are inserted at equal intervals. Furthermore, a rotatable screw shaft 31 is provided in parallel with said shaft 26 and fitted with blocks 41 and 42 as axially movable with the rotation thereof. Also, the blocks 41 and 42, and a plurality of the slide holders 29 and 30 are so connected to each other that said holders 29 and 30 can rotate with the turn of the spline shaft 26.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention makes it possible to vary the interval between the substrate transport rails and the interval between the substrate positioning widths according to the substrate sizes of different types of substrates, and also to position and hold a plurality of identical substrates at the same time. The present invention relates to a substrate holding device.

Conventional technology In recent years, there has been a growing trend toward high-mix, low-volume production in the field of production equipment.For example, in electronic component mounting equipment, there is a demand for equipment that can quickly and automatically respond to various types of substrates. It has been done. A conventional substrate holding device for holding a substrate in a predetermined position is, for example, disclosed in Japanese Patent Publication No. 56-494.
It is shown in the publication No. 74. Referring to the drawings below,
An example of a conventional substrate holding device will be described.

FIG. 6 shows a plan view of a conventional substrate holding device. In FIG. 6, 1 is a substrate, and 2 and 3 are rails having grooves 2a and 3a that support the edges of the substrate 1. Reference numeral 4 denotes a holder rotation shaft provided parallel to the rail, and holders 5 and 6 for positioning are fixed to this holder rotation shaft 4 with screws. 7 and 8 are screw shafts having threaded parts, 7a and 8a are guide rods, 09 and 10 are pulleys, 11 is a motor, 12 is a coupling, and 13 is an endless belt, which interlocks pulley 9 and pulley 1o. 014 is a lever that rotates the holder rotating shaft 4, 15 is a lever that detects the rotation of the boulder rotating shaft 4, and 16 is a microswitch for detecting the rotation of the lever 16. Pins 17 and 18 fit into positioning holes in the substrate 1, and are attached to the tips of the holders 6 and 6.

The operation of the substrate holding device configured as described above will be described below. Normally, when the substrate 1 is sent to the positioning position, the lever 14 is rotated, the holders 6 and 6 are rotated as the holder rotation shaft 4 is rotated, and the substrate 1 is moved to the positioning position.
When positioning substrates of different sizes that are fed into predetermined positions by a bushing cylinder or the like (not shown), screw shafts 7 and 8 are driven by the motor 11.
rotates, and as a result of this rotation, the rail pace 3b inserted through the threaded portion of the screw shaft is moved, and the distance between the rails 3 and 2 is changed in accordance with the width of the board. In addition, in order to move the holder 6 in accordance with the length of the board, remove the screw that fixes the holder from the holder rotation shaft 4, and then adjust the position of the holder 6 to match the positioning hole of the next board to accurately change the position. Problems to be solved by the invention However, in the above configuration, it is necessary to obtain the same board when changing the size of one board. It is uneconomical because it requires a lot of lost time to handle high-mix, low-volume production. In addition, there were other problems such as not being suitable for fully automated production.

In view of the above-mentioned problems, the present invention automatically varies the interval between the rails for conveying the board according to the width of the board, automatically changes the interval between the holders according to the positioning hole interval of the board, and furthermore, The present invention provides an original substrate holding device that allows the same person to do this to the substrate holding position.

Another object of the present invention is to provide a substrate holding device in which the position of a feed lever for feeding a substrate from one holding position to the next holding position can be changed in synchronization with the movement of the holder.

Means for Solving the Problems A substrate holding device according to the first invention that solves the above problems is provided with a pair of parallel rails that support the edges of the substrate, and the interval between the rails is adjustable by a motor. In the substrate holding device, a spline shaft parallel to the rail is rotatably provided along one or both of the rails, a plurality of reference holders are fixed in position on the spline shaft, and a plurality of reference holders are slidable on the spline shaft. a screw shaft rotated by a motor is arranged parallel to the spline shaft, and
The screw shaft is provided with a block that is movable in the axial direction by rotation of the screw shaft, and this block and the plurality of sliding holders are connected so that the sliding holders can rotate by rotation of the spline shaft. 0 In addition, the substrate holding device according to the second invention has the first invention as the main part, and is provided with a pair of parallel rails that support the edge of the substrate, and the distance between the rails is controlled by a motor. In the adjustable substrate holding device, a spline shaft parallel to the rail is rotatably provided along one or both of the rails, and a plurality of reference holders fixed in position on the spline shaft slide on the spline shaft. A plurality of movable sliding holders are respectively inserted at equal intervals, and parallel to the spline shaft, a screw shaft rotated by a motor and a lever movement shaft of a feed lever for moving the substrate are provided, Rotation of the screw shaft inserted through the screw shaft connects the axially movable block and the plurality of sliding holders, and also makes it possible to separate the block and the feed lever block provided with the feed lever. It has a connected configuration.

Operation With the above configuration, the first invention can automatically change the interval between the rails that support the board and the interval between the reference holder and the sliding holder at multiple locations simultaneously, thereby changing the size of the board. According to the second invention, the feed lever that sends the board to the next holding position moves in synchronization with the change in the position of the sliding holder. The distance between the feed lever position and the board can be kept the same regardless of the board size change, allowing the board to be efficiently moved to the next position even if the board changes (for example, if it becomes a smaller board). It can be transported and flexible production can be carried out efficiently.

Embodiment Hereinafter, a substrate holding device according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a plan view of a substrate holding device in a first embodiment of the present invention. In FIG. 1, 19 and 2o are rails having grooves 19a and 20a that support the board, 21 is a motor that is driven when changing the rail spacing, and 22
and 23 are screw shafts which are movably inserted through the block 19b that supports the rail 19. 24 and 26 are guide shafts. 26 is a spline shaft, 27 and 28
A reference holder is movable only in the axial direction of the spline shaft 26, but is usually fixed to a predetermined amount of the spline shaft 26 with screws 27a and 28a. 29 and 3o
is a sliding holder slidably mounted on a spline shaft. 31 is a frame portion 32 parallel to the spline shaft 26;
It is a screw shaft supported by bearings 33 and 33a on the top. 34 is a motor that drives the screw shaft 31 when changing the board. 36 and 36 are couplings for transmitting the rotation of the motors 21 and 34 to each shaft.

Reference numeral 37 denotes a pulley, and the pulleys 37 fixed to the screw shafts 22 and 23 can be rotated synchronously by an endless chain (or belt).

38 is a lever for rotating the spline shaft, 39 is a lever for detecting rotation of the spline shaft, and a micro switch 4o
The presence or absence of rotation is detected by contact with. 41 and 4
Reference holder 2 is movable by rotation of a screw shaft 310 and is attached to a spline shaft 26 on the screw shaft 31.
7 and 28, the blocks are inserted through the blocks at the same intervals. Reference numeral 43 denotes a bottle that fits into a positioning hole in the substrate 1, and is attached to each tip of the reference holders 27 and 28 and the sliding holders 29 and 30. 44 is a feed lever for moving the board to the next section, and has a constant stroke (stroke that can transport the maximum board)
The cylinder is attached to a cylinder moving shaft (not shown) so that it can be driven by the cylinder.

The operation of the substrate holding device configured as described above will be described below.

When changing the substrate size, the motors 21 and 34 rotate by a predetermined amount based on the width of the substrate and the spacing between the holes on the substrate, which are data programmed in advance in a control unit (not shown). As a result, the screw shaft 22 rotates, and the rotation of the pulley 37 is transmitted to the screw shaft 23 by the endless chain, so that the screw shaft 23 rotates in synchronization with the screw shaft 22. This rotation causes the block 19b that supports the rail to move, causing the rail 19 to move,
The distance between rail 19 and rail 20 is changed. Further, the screw shaft 31 is rotated by the rotation of the motor 34, and the screw shaft 31 is rotated by the rotation of the motor 34.
Blocks 41 and 42 (in the shape of a nut with respect to the screw shaft 31) inserted through the screw shaft 31 move in the axial direction.

As a result, the holder engaging portions 41a of the blocks 41 and 42, as shown in FIG. 3a and FIG.
and 42a are rotatably engaged with sliding holders 29 and 30, respectively, so that blocks 41 and 42a are rotatably engaged with sliding holders 29 and 30, respectively.
The sliding holders 29 and 3o move on the spline shaft by an amount equivalent to the amount of movement of 2. When the movement of the rail 19 and the movement of the sliding holders 29 and 30 are completed, the rotation lever 38 of the spline shaft is driven (the drive source is not shown), and the detection lever 39 is also rotated.
As shown in the figure, this rotation is detected by a microphone switch, and the substrate 1 is transferred to a predetermined holding position.

As described above, according to this embodiment, a plurality of sliding boulders can be moved by the same driving source, and it is possible to position and hold many identical boards, and even when the board size changes. Able to respond to changes efficiently.

Next, a second embodiment will be described with reference to FIGS. 4 and 5. Note that the description of parts that overlap with the description of the first embodiment will be omitted.

FIG. 4 is a plan view of the substrate holding device in the third embodiment.

Reference numeral 45 denotes a spline shaft for moving the feed lever block (hereinafter referred to as the moving shaft of the feed lever) which is inserted through the feed lever blocks 46 and 47 arranged parallel to the screw shaft 31 so as to be movable in the axial direction, and is similar to 39. A detection lever (not shown) is attached.

48 is a threaded shaft for moving the feed lever (hereinafter referred to as the threaded shaft of cylinder 2), and 49 is a guide rod provided parallel to the second threaded shaft 48. 6o is a motor that drives the second screw shaft 48, and 51 and 52 are bearings that support the second screw shaft 48 and the guide rod. 63 and 64 are lever sliding blocks that allow movement of the feed lever block. In FIG. 6, 66 is a cylinder, and 66 is a rotation regulating block attached to the tip of the cylinder shaft. The rotation regulation block has a regulation surface 56a having a curved surface, and is slidably supported within the lever sliding block 53.

An interlocking lever 67 is rotatably attached to the lower part of the feed lever block 46 with a pin 58 . Reference numeral 59 denotes a spring, and the interlocking lever 67 is retained by the regular face 60 of the feed lever block 46 by this spring 59. 6
Reference numeral 1 denotes a connecting rod, which has a cam follower 62 at its tip and is rotatably supported within a feed lever block 63. Blocks 41b and 4 inserted through the screw shaft 31
2b is provided with tapered portions 63 and 64, respectively, at least at positions in the axial direction that contact the interlocking lever 57.

The operation of the substrate device configured as above will be explained.

When changing the board size, the rail 19 and the sliding boulders 29 and 30 are moved in accordance with the width of the board and the spacing between the positioning holes in the board, as described in the first embodiment. At this time, since the rotation lever 45a of the second spline shaft is not rotated, the blocks 41b and 42b are connected to the lever sliding block 63 by the connecting pars 57 and 57a, and the feed lever block 63 is interlocked with the movement of the sliding holders 29 and 30. will be moved.

Next, when the feed lever rotates due to the rotation of the second spline shaft (when entering the board feeding operation), the interlocking lever 67 and the block 41b move to the interlocking lever 57 as shown in FIG.
Leaves due to movement.

In this state, the lever sliding blocks 63 and 54 are moved by the programmed amount of movement by the rotation of the motor 6o, and after moving a predetermined stroke, return to the original position while rotating the feed lever upward.

When returning, the interlocking lever 67 comes into contact with a part of the taper provided at the interlocking lever contact portion of the blocks 41b and 42b, and the spring 5
9 engages the interlocking lever 67 in the connecting position within the blocks 41b and 42b.

As described above, by moving the feed lever in conjunction with the movement of the sliding holder, the distance between the substrate position and the feed lever can be kept the same even if the substrate size changes, and unnecessary If the movement of the feed lever is eliminated and the board is made smaller, the feed tact can be increased.

Effects of the Invention As described above, the present invention provides a rotatable spline shaft parallel to the rail along one or both of the rails, and a plurality of reference holders fixed in position to the spline shaft. A plurality of slidable sliding holders are inserted through each at the same interval, and a rotatable screw shaft is arranged parallel to the spline shaft, and the screw shaft is provided with a rotatable screw shaft that moves in the axial direction by the rotation of the screw shaft. Set up possible blocks,
The block and the plurality of sliding holders are rotatably connected by the rotation of the spline shaft, and the distance between the positioning holders is variable in accordance with the distance between the position regulating portions of the substrate; Furthermore, since it can be performed simultaneously for a plurality of substrate holding positions, there is an effect that the switching operation of the transport section corresponding to the substrate size can be carried out efficiently and with high precision.

In addition, a rotatable screw shaft and a lever movement shaft of the feed lever are provided parallel to the spline shaft inserted through the sliding holder.
A block inserted through the screw shaft and movable in the axial direction by rotation of the screw shaft is connected to the plurality of sliding holders, and the block and the feed lever block provided with the feed lever are separated. By connecting them together, the distance between the positioning holders can be adjusted simultaneously according to the distance between the positioning parts of the board, and even if the size of the board changes, the distance between the board and the feed lever can be kept the same. For small-sized boards, it has the effect of increasing the board feeding tact.

[Brief explanation of the drawing]

1 is a plan view of a substrate holding device according to a first embodiment of the present invention, FIG. 2 is a side view of the main part of FIG. 1, and FIG. 3 is a cross-sectional view taken along line A-A in FIG. 1. , FIG. 3 is the same cross-sectional view showing the state during movement in FIG. 3 a, FIG. 4 is a plan view of the substrate holding device in the second embodiment, and FIG. 6 is a line BB in FIG. 4. The cross-sectional view, FIG. 6, shows flat teeth of a conventional substrate holding device. 19.20...Rail, 21.34...
・Motor, 22.23,31... Screw shaft, 26
...Spline shaft, 27, 28...Reference holder, 29,30...Sliding holder, 4
4...Feed 9 lever, 46...Lever movement shaft (spline shaft), 46.47...Feed lever block, 48...For feed lever movement Screw shaft (second screw shaft) 0 Name of agent Patent attorney Toshio Nakao and 1 other person 2nd
Figure 3

Claims (2)

[Claims] (1) In a board holding device that is provided with a pair of parallel rails that support the edge of a board and the interval between the rails can be freely adjusted by a motor, a spline parallel to the rails is provided along one or both of the rails. A shaft is provided to be rotatable, and a plurality of reference holders fixed to the spline shaft and a plurality of sliding holders that are slidable to the spline shaft are respectively inserted at equal intervals, and parallel to the spline shaft. A rotatable screw shaft is disposed in the screw shaft, and a block is provided on the screw shaft that is movable in the axial direction by rotation of the screw shaft, and the block and the plurality of sliding holders are slidably moved by rotation of the spline shaft. A substrate holding device consisting of a rotatably connected holder. (2) In a board holding device that is provided with a pair of parallel rails that support the edge of the board and the interval between the rails can be adjusted by a motor, a spline parallel to the rails is provided along one or both of the rails. A shaft is rotatably provided, and a plurality of reference holders fixed in position on the spline shaft and a plurality of sliding holders slidable on the spline shaft are respectively inserted at equal intervals, and the spline shaft and A rotatable screw shaft and a lever movement shaft of a feed lever for moving the substrate are provided in parallel, and a block that is movable in the axial direction by rotation of the screw shaft inserted through the screw shaft and the plurality of blocks are provided. A substrate holding device configured by connecting a sliding holder and removably connecting the block and a feed lever block provided with the feed lever.