JPH032376Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a device for preventing warpage of a board to be soldered during soldering.

(Prior art) When soldering a printed wiring board as a board to be soldered while being held between gripping claws provided on both sides of the transport chain and being transported, the solder board may come into contact with or come close to the molten solder surface in the solder bath. The printed wiring board is likely to warp due to the heat of the molten solder and its own weight, resulting in the inconvenience that the molten solder may flow onto the top surface of the printed wiring board.

In order to prevent this inconvenience, a special application
As shown in the specification and drawings of No. 178207,
A clamping device is mounted on a moving base that is transferred synchronously with the soldering board being transported on the soldering bath, and the clamping mechanism moves horizontally towards the front and rear ends of the soldering board to clamp the front and rear ends at a fixed level. Department and
A device for preventing warpage of a soldering board has been developed, which includes a hook that is hooked into a long hole drilled in the soldering board to correct the warping of the soldering board.

This conventional warpage prevention device is effective when the elongated hole 12a of the printed wiring board 11 serving as the board to be soldered is elongated in the front-rear direction (progressing direction) as shown in FIG. .

This is because even after the closing operation completion position of the holding portions located at the front and rear ends of the printed wiring board 11 has been determined, there is a margin in the front and back direction between the long hole 12a and the hook 13a in the front and back direction. Long hole 12a
This is because the position of the hook 13a inserted in the front and rear can be adjusted in the front and rear directions.

(Problem to be solved by the invention) On the other hand, as shown in FIG. 8, the elongated hole 12 of the printed wiring board 11 is elongated in the left-right direction perpendicular to the front-rear direction (progressing direction). If the closing operation of the holding portions located at the front and rear ends of the printed wiring board 11 is determined, there will be no room between the elongated hole 12 and the hook 13 in the front and back direction. The position of the hook 13 inserted into the elongated hole 12 cannot be adjusted in the front-back direction.

When inserting the hook 13 into such a long hole 12 in the left-right direction, after accurately adjusting the hook position in the front-back direction, the closing operation completion positions of the front and rear clamping parts must also be adjusted in the front-back direction. However, in order to do so, it is necessary to move and adjust the mounting positions of the front and rear clamping part opening/closing cylinders for horizontally opening and closing the front and rear clamping parts, and these adjustments are not easy.

Therefore, conventionally, such a long hole 12 drilled in the left-right direction was avoided, and a long hole 12a in the front-rear direction was used.
I was restricted from inserting hook 13a into the
In some cases, the elongated hole 12a in the front-rear direction is not provided.

The purpose of this invention is to accurately position and adjust the hook in the front and back direction in relation to the long holes of the soldering board, and especially to adjust the closing operation completion position of the clamping parts located at the front and rear ends of the soldering board. without adjusting
The object of the present invention is to provide an easy-to-use warpage prevention device.

[Structure of the idea]

(Means for Solving the Problems) The present invention provides a movable base 33 that is transported synchronously with the soldering target board 11 that is transported on a soldering bath.
In addition, there are a clamping part 54 that holds the front and rear ends of the board to be soldered at a certain level, and a hook 13 that is hooked into a long hole 12 drilled in the board to be soldered to correct the warpage of the board to be soldered. In the device for preventing warpage of a board to be soldered, a bearing part 71 is integrally provided on the movable base 33, and a hook position adjustment mechanism 72 is provided on this bearing part 71 to prevent the warping of the board to be soldered 11 in the same direction as the back and forth direction. An interlocking rod 73 that is movably adjusted in the axial direction of the directionality is slidably fitted, and a hook mounting base 74 is integrally provided in the center of the interlocking rod 73.
Attachment bases 7 for the front and rear clamping parts 54 on both sides of 3.
5 is slidably fitted, and the front and rear clamping parts 54
The interlocking rod 7 is attached to the mounting base 75 of the
A piston rod 78 of a clamping part opening/closing cylinder 77 fixed to the piston rod 3 is connected thereto.

(Function) In the present invention, when the hook 13 is adjusted in the front-rear direction so as to match the long hole 12 of the board 11 to be soldered, the closing operation of the clamping portion 54 that clamps the front and rear ends of the board to be soldered is completed. The clamping part opening/closing cylinder 77 that determines the opening/closing cylinder 77 is also automatically adjusted in position by the interlocking rod 73, and the relative positional relationship between the hook 13 and the closing operation completion position of the front and rear clamping parts 54 closed by the front and rear clamping part opening/closing cylinders 77 is adjusted. , remains constant regardless of the adjustment of the hook position.

(Embodiments) Hereinafter, the present invention will be explained in detail with reference to embodiments shown in FIGS. 1 to 8.

As shown in FIGS. 5 and 6, the base frame 2
A movable plate 23 is attached to a rail 22 provided on the lower surface of 1.
A sliding portion 24 is movably fitted. This moving plate 23 is connected to a connecting plate 26 to a transfer chain 25 which is arranged endlessly so as to be rotated along the base frame 2.
It is moved by the transport force of the chain 25, which is connected to the soldering board via the chain 25 and is driven at the same speed as the printed wiring board 11 as the board to be soldered.

A vertical movement guide plate 31 is integrally provided on the lower surface of the movable plate 23, and the rail 3 of this vertical movement guide plate 31
2, a moving base 33 is transferred synchronously with the printed wiring board 11 being transferred on the solder bath.
It is fitted so as to be vertically movable via a sliding portion 34 on the back surface. As shown in FIG. 6, the sliding portion 34 of the movable base 33 is connected to a chain wound around sprockets 36 and 37 that are pivotally supported on an elevating plate 35 and sprockets 38 and 39 that are pivotally supported in fixed positions. 40
is connected to.

The elevating plate 35, as shown in FIG.
The guide plate 31 is moved up and down by an elevating cylinder 43 attached to the rear side via mounting plates 41 and 42, and when the elevating plate 35 is lowered by this cylinder 43, the movable base 33 is raised, and when the elevating plate 35 is raised, the movable base 33
is lowered. The moving base 33 is lowered and transferred in synchronization with the substrate 11 on the solder bath, and then raised and returned to the standby position.

As shown in FIGS. 5 and 6, a cover 51 for protecting the mechanism according to the present invention is provided on the front side of the movable base 33, and arms 52 protrude from the front and rear of the cover 51, respectively.
, the printed wiring board 11 is attached via the mounting plate 53.
A clamping part 5 that closes horizontally towards the front and rear ends of the holder and clamps the front and rear ends at a constant level.
4 are provided. The holding parts 54 on both sides are
It has a stopper 55 located above the board 11 and a pawl 56 located below the board 11 and moved up and down by a cylinder with a built-in holding part.After the horizontal closing operation is completed, the upper stopper 55 The front and rear ends of the substrate 11 are held at the level of the stopper 55 by the lower claw 56 and the lower claw 56 .

In addition, a mounting plate 6 is provided in front of the central portion of the cover 51.
A gearbox 62 is provided through the gearbox 1, and two rods 63 are protruded from the bottom of the gearbox 62.The lower end of each rod 63 is hooked into a long hole 12 drilled in the printed wiring board 11. A hook 13 for correcting warpage in the center of the printed wiring board 11 is integrally provided.

As shown in FIG. 7, the gearbox 6
A pair of cylinders 65 are provided inside the rod 63 to move the rod 63 up and down via a plate member 64, and a pinion 6 is provided at the top of the rod 63.
6 is fitted integrally with the pinion 66, and is provided with a rack 67 that is always in mesh with the pinion 66 and is movable in the horizontal direction, and is moved in the left-right direction by a cylinder 68. The piston rod 69 of this cylinder 68 is of a double rod type and is connected to the rear surface of the rack 67 via a mounting plate not shown in the figure.

Then, the rod 6 is moved by the cylinder 65.
3, insert the tip end hook of the hook 13 into the elongated hole 12 of the base plate 11 as shown by the two-dot chain line in FIG.
7, the pinion 66 is rotated, and the tip hook portion of the hook 13 is rotated to the underside of the base plate 11 as shown by the dotted line in FIG.

Next, as shown in FIGS. 1 to 4, a pair of bearings 71 are integrally screwed to the movable base 33, and a pair of bearings 71 provided in each bearing Hook position adjustment mechanism 72
A pair of interlocking rods 73 which are slidably adjusted in the axial direction in the same direction as the front-rear direction of the printed wiring board 11 are fitted in a slidable manner.
A pair of hook mounting boards 74 are integrally fitted (fastened with screws) to the center of the interlocking rod 73.
Attachment bases 75 of the front and rear holding parts 54 are provided on both sides of the
are slidably fitted, and the interlocking rods 7 are attached to the mounting bases 75 of the front and rear holding parts 54, respectively.
A piston rod 78 of a clamping part opening/closing cylinder 77, which is integrally fixed to 3 through a mounting plate 76, is connected thereto. Then, the arm 5 is attached to the mounting base 75.
2 are attached together. This arm 52
protrudes outside through a movable seal member 79 provided in the opening of the cover 51, as shown in FIG.

A plate member 8 is provided between the pair of hook mounting bases 74.
A pair of guides 82 and a cylinder 83 are provided on this plate member 81, and a box-shaped member 85 is fitted to the guide 82 via a rod 84 so as to be vertically movable. It is moved up and down. The gear box 62 is attached to this box-shaped member 85 via the attachment plate 61, as shown in FIG.

Then, as the box-shaped member 85 is raised by the cylinder 83, the hook 13 inserted into the long hole 12 of the base plate 11 and rotated is pulled up, as shown in FIG. , the warpage of the printed wiring board 11 is corrected.

As shown in FIG. 2, the pair of hook position adjustment mechanisms 72 include a spring adjustment screw 91 screwed into the bearing portion 71 and a spring receiving portion 92
A compression spring 93 is fitted between the screws 94 screwed into the pair of hook mounting bases 74,
The receiving parts 92 located on the left and right sides are elastically held by the pressing force of the springs 93, and the balance between the left and right springs 93 can be adjusted by rotating and adjusting the left and right screws 91. , the position of the pair of hook mounting bases 74 is adjusted to the elongated hole 12 of the board 11.
Adjust the movement accordingly to align the hook 13 and the elongated hole 12.

At this time, the interlocking rod 73 also connects to the hook mounting base 7.
The movement is adjusted along with 4, and this rod 7
The clamping part opening/closing cylinders 77 on both sides, which are integral with 3, are also adjusted to move equally.

Therefore, when the hook 13 is adjusted to move in the front-rear direction of the printed wiring board 11, the closing operation completion positions of the front and rear clamping parts 54, which are closed by the front and rear clamping part opening/closing cylinders 77, also move equally in the front-rear direction. Therefore, there is no need to move or adjust the mounting position of the cylinder 77.

[Effect of idea]

According to the present invention, a bearing part is integrally provided on the moving base, and an interlocking rod that is adjusted to move in the width direction in the same direction as the back and forth direction of the board to be soldered is slid on this bearing part by a hook position adjustment mechanism. A hook mounting base is integrally provided in the center of the interlocking rod, and mounting bases of front and rear clamping parts are slidably fitted on both sides of the interlocking rod,
Since the piston rods of the clamping part opening/closing cylinders fixed to the interlocking rods are connected to the mounting bases of the front and rear clamping parts, when the hook mounting bases are moved and adjusted by the hook position adjustment mechanism, the integral clamping parts are connected via the interlocking rods. The opening/closing cylinder is also automatically adjusted to move the hook in relation to the elongated hole of the board to be soldered, without having to particularly adjust the closing operation completion position of the front and rear clamping parts, which is determined by the mounting position of this cylinder. It is easy to accurately position and adjust the position in the front-back direction.

[Brief explanation of the drawing]

FIG. 1 is a front view of the main parts of an embodiment of the warpage prevention device of the present invention, FIG. 2 is a sectional view of one side of the hook position adjustment mechanism, and FIG. 3 is a plan view of the main parts.
Fig. 4 is a perspective view of the device, Fig. 5 is a front view of the entire device, Fig. 6 is a side view thereof, Fig. 7 is a front view of the mechanism for vertically moving and rotating the hook, and Fig. 8 is a front view of the device. FIG. 9 is an explanatory diagram showing the action of the hook of the present invention, and FIG. 9 is an explanatory diagram showing the action of the conventional hook. 11...Printed wiring board as a board to be soldered, 12...Long hole, 13...Hook, 33...
Moving base, 54... holding part, 71... bearing part,
72... Hook position adjustment mechanism, 73... Interlocking rod, 74... Hook mounting base, 75... Clamping part mounting base, 77... Clamping part opening/closing cylinder, 78...
...Piston rod.

Claims (1)

[Scope of utility model registration request] A moving base that is transferred synchronously with the soldering board being transported on the soldering bath has a holding part that holds the front and back ends of the soldering board at a fixed level, and a long hole drilled in the soldering board. In the device for preventing warpage of a soldering board, which is provided with a hook that is hooked into a hole to correct warping of the soldering board, a bearing portion is integrally provided on the movable base,
An interlocking rod that is slidably adjusted in the axial direction in the same direction as the back and forth direction of the board to be soldered is fitted into this bearing part by a hook position adjustment mechanism, and a hook mounting base is attached to the center of this interlocking rod. are integrally provided, mounting bases of the front and rear clamping parts are slidably fitted on both sides of the interlocking rod, and clamping parts fixed to the interlocking rod are respectively attached to the mounting bases of the front and rear clamping parts. A device for preventing warpage of a soldering plate, characterized in that a piston rod of an opening/closing cylinder is connected.