JPH0831719B2 - Substrate back side holding device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a substrate backside pressing device used in a device such as a surface mounting component mounting machine, and more particularly to a substrate backside pressing device for pressing the backside of a substrate after mounting the surface mounting component.

[0002]

2. Description of the Related Art FIG. 3 shows a structure of a conventional substrate back surface holding device for mounting a surface mounting component such as an integrated circuit on a printed circuit board and thereafter pressing the back surface thereof. The substrate back surface pressing device 11 includes a pressing pin 12 having a constant length.
Has a flat base plate 13 for arranging
This is moved up and down by the air cylinder 14.

On the back surface of the substrate on which the surface-mounted components are mounted, there are protrusions such as these components, and the arrangement state of these components and the height of these components differ depending on the type of printed circuit board. Therefore, the operator should check in advance the areas on the board where no protrusions exist, depending on the type of printed board to be handled.
The pressing pin 12 is arranged on the base plate 13 in correspondence with these positions.

Incidentally, Japanese Patent Laid-Open No. 3-99499 discloses that
A technique relating to a component mounting method and device on a flexible printed wiring board is disclosed in which a pair of side edge portions of the flexible printed wiring board facing each other are respectively held by clamps and a mounter head presses a component onto the flexible printed wiring board. However, this is a technique in which the side edge portion of the flexible printed wiring board itself is sandwiched by plate-shaped clamps, and this is a technique that cannot be applied to a substrate on which surface-mounted components have already been mounted.

[0005]

In the conventional substrate back surface pressing device shown in FIG. 3, the tips of the plurality of pressing pins 12 having a constant length are brought into contact with a portion of the substrate where there is no protrusion. The whole substrate is pressed down. Therefore, it is necessary to change the arrangement of the presser pins 12 on the base plate 13 each time the type of substrate is different, and adjustment time for that is required.
Further, it is necessary to prepare the base plate 13 in which the pressing pins 12 are arranged in various forms and replace them appropriately. Further, depending on the arrangement state of the protrusions on the back surface, the pressing pins 12 cannot be abutted against the substrate with a uniform density as a whole, so that there is a problem that the pressing is incomplete especially in the case of a flexible substrate.

Therefore, an object of the present invention is to use a variety of substrates having different backside irregularities, which can be commonly used without individual adjustment, and which can evenly hold down the backside of the substrate. To provide a holding device.

[0007]

The [Summary of invention of claim 1, wherein a base plate such as (i) the base unit, and (ii) a plurality arranged oil cylinder at a given density on the base plate, (c ) An elevating means such as an air cylinder that moves the base plate closer to or away from the back side of the stopped substrate, and (d) the elevating means moves the base plate to the predetermined position where the upper end of each oil cylinder is pressed against the substrate. while stopping the rise of the base plate by the lifting means when close to, the temperature at the time the hold-down of the substrate is completed
Elevating control means for lowering the descending means to the original position, and (e)
After one of the oil cylinders is pressed against the board
Each oil until the base plate stops rising
Depending on how much the cylinder is pushed
Oil reservoir that collects via a valve, and (f) lift control
When the control means stops raising the base plate
Control the flow of oil from the water tank to the oil reservoir
While closing the valve,
An electromagnetic valve for opening it is provided in the substrate backside pressing device.

[0008] That is, in a first aspect of the present invention, should be placed in a plurality of the oil cylinder to the base plate, each Oirushi
The top edge of the binder is pushed into place so that it is fully pressed against the board.
The elevating means brings the base plate close to the substrate, and
Open the lube and remove the oil cylinder
Oil from these depending on how much da is pressed
Store in the reservoir.

Then, when the predetermined position is reached, the power is turned on.
Close the magnet valve so that the top of each oil cylinder is
Fix the pressed state at a height according to the unevenness of the board
It When you finish pressing the substrate, lift means
Lower the solenoid valve while opening the solenoid valve
Return the oil stored in the
We will return these heights to the original level.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to embodiments.

FIG. 1 shows a substrate back surface pressing device according to an embodiment of the present invention and a substrate pressed by the device. The substrate back surface pressing device 21 is added to a device such as a surface mount component mounting machine, and when the substrate 22 on which the surface mount components such as integrated circuits are mounted on the back surface is stopped immediately above this, presses it from the back surface. It is like this.

The substrate back surface pressing device 21 includes an air cylinder 23, a base plate 24 that is vertically movable by the air cylinder 23, and the base plate 2.
4, an electromagnetic valve 26 for controlling the outflow of oil in an oil cylinder 25, and an oil reservoir 27 for storing the oil. Base plate 24
A base plate stopper 28 for setting the upper limit position of the base plate 24 is provided at a predetermined position between the substrate 22 and the substrate 22.
Has been fixed.

FIG. 2 shows the arrangement of the oil cylinders on the base plate. Base plate 2
In 4, a large number of oil cylinders 25 are arranged in a grid pattern. Above the base plate 24, two base plate stoppers 28A and 28B which contact these side portions at a predetermined height are arranged.

Since the substrate back surface pressing device 21 has such a structure, when a certain substrate 22 is stopped immediately above the device 21, the base plate 24 in which the oil cylinders 25 filled with oil are arranged is the air cylinder 23. Rises and stops at the position where it comes into contact with the base plate stopper 28. Until this time, the electromagnetic valve 26 is open, and the amount of pushing of each oil cylinder 25 differs according to the height of the surface-mounted component and the uneven surface determined by the presence or absence thereof. The oil in each oil cylinder 25 is
The oil reservoir 2 is passed through the electromagnetic valve 26 as much as it is pressed.
Stored in 7.

When the base plate 24 comes into contact with the base plate stoppers 28A and 28B and stops its rising,
The electromagnetic valve 26 is closed. As a result, the position of each oil cylinder 25 is fixed, and the substrate back surface pressing device 21 uniformly presses the substrate 22 from its back surface.

When the pressing of the substrate 22 is completed, the air cylinder 23 descends, and the base plate 24 descends accordingly. At this time, the electromagnetic valve 26 opens again,
The oil reservoir 27 supplies oil to the respective oil cylinders 25 by its internal pressure and restores their heights to the original state. If the next substrate 22 is sent to the position directly above the substrate back surface pressing device 21 of the surface mount component mounting machine instead of the current substrate 22 and stopped, the substrate may be pressed from the back surface in the above-described procedure. Therefore, it is possible to press the substrate 22 from the back side in the same procedure and using the same base plate 24 even if the unevenness of each substrate 22 is different.

In the embodiment, the oil cylinders 25 are arranged on the base plate 24 in a grid pattern, but the oil cylinders 25 in the odd rows are different from the oil cylinders 25 in the even rows.
The arrangement positions may be shifted by ½ of the arrangement intervals. As described above, the arrangement of the oil cylinders 25 is not limited to the embodiment, and it goes without saying that various arrangements can be adopted.

In the embodiment, the case where the substrate back surface pressing device is used for the surface mounting component mounting machine has been described, but the present invention can be applied to other devices for processing the substrate such as a solder paste printer and an adhesive coating machine. It can be applied similarly.

As described above, according to the first aspect of the present invention, a plurality of oil cylinders can be used to accurately adjust to the unevenness of the substrate by the vertical movement of these oil cylinders, and the oil cylinders can be moved by the electromagnetic valve. upon
Since the lower motion is fixed, various uneven shapes can be created with a simple mechanism.
The back surface of the substrate can be pressed and released. Well
Also, add oil according to the height of each oil cylinder.
Let it flow out, stop the electromagnetic valve and
Since the height is fixed, it is not overloaded for parts protruding from the board.
There is no load and there is no danger of destroying it.
In addition, the oil that has flowed out from the oil cylinder is
I will store it in the server and return it to the base,
The fluid does not flow out to the outside.
Noise and pressure to release compressed air to the outside when using
The noise of the device that creates the compressed air does not pose a problem.

[0020]

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a substrate back surface pressing device and a substrate pressed by the device according to an embodiment of the present invention.

FIG. 2 is a plan view showing an arrangement state of oil cylinders on a base plate.

FIG. 3 is a schematic configuration diagram showing a configuration of a conventional substrate back surface pressing device.

[Explanation of symbols]

 21 Substrate Backing Device 22 Substrate 23 Air Cylinder 24 Base Plate 25 Oil Cylinder 26 Electromagnetic Valve 27 Oil Reservoir 28 Base Plate Stopper

Claims (1)

[Claims] 1. A base plate, a plurality of oil cylinders arranged at a predetermined density on the base plate, an elevating means for moving the base plate toward and away from the back surface of the substrate stopped above, and each oil. The upper end of the cylinder is pressed against the board
One to stop the rise of the base plate by the lifting means when said lifting means is closer to the base plate to the substrate to a predetermined position
However, when lifting the board
One of the above-mentioned oil cylinders and lifting control means for lowering to the position is pressed against the board.
From the time until the base plate stops rising
Oil cylinders come out of these depending on how much they are pushed
An oil reservoir for storing oil through the valve, and an oil reservoir when the lifting control means stops the lifting of the base plate.
Oil flow from the oil cylinder to the oil reservoir
The valve that controls the
A substrate back surface pressing device, comprising: an electromagnetic valve that opens the valve when completed .