JP2000114797A - Work backup device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cope with a plurality of kinds of works, and at the same time to prevent a backup pin from being falsely placed. SOLUTION: A work backup device 1 is provided with a pedestal 2 that has a horizontal upper surface 3a, a plurality of guide plates 5 that are prepared, one for each of a plurality of kinds of works where backup positions differ one another and are placed on the upper surface of the pedestal, and a plurality of backup pins 6. The pedestal receives the backup pin in an axial direction, and at the same time has a plurality of pin insertion holes 5a for vertically supporting the backup pin while the backup pin projects at a specific height from the upper surface of the pedestal. Each guide plate is formed so that a pin insertion hole at the backup place of the corresponding work is opened and other pin insertion holes are covered, and the backup pin is inserted into the opened pin insertion hole for placement while any one of the plurality of guide plates is placed on the upper surface of the pedestal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work backup device for backing up a work such as a circuit board.

[0002]

2. Description of the Related Art For example, when printing cream solder on a circuit board or mounting electronic components on a circuit board using a mounting machine, the back surface of the surface to be processed of the circuit board is supported at a plurality of locations. For this purpose, a work backup device in which a plurality of backup pins are vertically provided on an upper surface of a pedestal is used.

The previous work backup device has a structure in which a backup pin is fixed to a pedestal and cannot support another work having a different backup location. Therefore, the same number of work backup devices as the types of work are provided. We had to prepare and it was uneconomical.

[0004] In view of such a problem, a work backup device capable of inserting and removing a backup pin from a pedestal has recently been proposed. In this work backup device, the pedestal has a large number of pin insertion holes for receiving the backup pin in the axial direction and vertically supporting the backup pin in a state where the backup pin projects a predetermined height from the upper surface of the pedestal. Can be set arbitrarily, so that it is possible to handle a plurality of types of works.

[0005]

In the work backup device described above, the backup pin is mounted on the pedestal manually, but there is a problem that the backup pin is easily erroneously mounted in a pin insertion hole other than the backup portion. .

Conventionally, a work is fixed by pressing the work against a backup pin with a holding device arranged above the work backup device. However, only such fixing means is used to fix the work during processing. There was a problem that it was easy to move.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to enable a plurality of types of workpieces to be handled and to prevent erroneous mounting of a backup pin. To provide a work backup device.

It is another object of the present invention to provide a work backup device with improved work fixing reliability.

[0009]

In order to achieve the above-mentioned object, a work backup device according to the first aspect of the present invention creates a pedestal having a horizontal upper surface and a plurality of types of works having different backup positions from each other. And
The pedestal comprises a plurality of guide plates mounted on an upper surface of the pedestal, and a plurality of backup pins, wherein the pedestal receives the backup pin in the axial direction and projects the backup pin from the upper surface of the pedestal by a predetermined height. Each of the guide plates is formed so as to open the pin insertion hole at the backup location of the corresponding work and to cover the other pin insertion holes. Wherein one of the plurality of guide plates is mounted on the upper surface of the pedestal and the backup pin is inserted and mounted in the opened pin insertion hole. It is.

According to a second aspect of the present invention, in the work backup device of the first aspect, each of the backup pins has a through hole extending in an axial direction, and communicates with each of the pin insertion holes inside the pedestal. A decompression chamber is formed and a decompression means for decompressing the inside of the decompression chamber is provided.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of a work backup device 1 according to an embodiment of the present invention, and FIG.

The work backup device 1 is mounted on a screen printer for printing cream solder on the surface of a circuit board W, and serves to back up the back surface of the circuit board W during printing. A pedestal 2 comprising a pedestal main body 3 and a box-shaped decompression case 4 having an open upper surface, and a plurality of guide plates 5, 5,... (Only one is shown) mounted on the upper surface of the pedestal main body 3 , A plurality of columnar backup pins 6, 6,....

The pedestal body 3 is made of metal, hard resin, or the like.
.. Have a large number of circular pin insertion holes 3b, 3b,. The inner diameter of the pin insertion holes 3b, 3b,... Is such that the reduced diameter portion 6a (described later) formed at the lower end of the backup pins 6, 6,. I have.

The decompression case 4 is made of a metal, a hard resin, or the like, and has a step portion 4a formed at an inner corner thereof over the entire periphery. The step portion 4a supports a peripheral edge of the lower surface of the pedestal body 3, The pedestal main body 3 can be supported with its upper part protruding from the decompression case 4. When the pedestal main body 3 is set in the decompression case 4, a decompression chamber 7 is formed between the upper surface of the bottom wall 4 b of the decompression case 4 and the lower surface of the pedestal main body 3. A suction hole 4c communicating with the pressure reduction chamber 7 is formed on one side surface of the pressure reduction case 4, and a vacuum pump (pressure reduction means) P is connected to the suction hole 4c.

The guide plate 5 is made of metal, hard resin, or the like.
It is formed so as to be aligned with the upper surface of the pedestal body 3. The guide plate 5 has a plurality of circular guide holes 5a, 5a,... Which penetrate in the thickness direction and have substantially the same diameter as the pin insertion holes 3a.
Is provided. The guide plate 5 is created one by one for each of a plurality of types of works having different backup positions, and the guide holes 5 of the respective guide plates 5, 5,.
are arranged so as to be aligned with the pin insertion holes 3a, 3a,... of the corresponding backup portions of the circuit board. Therefore, the guide plate 5 is connected to the pedestal body 3.
, The corresponding pin insertion holes 3a, 3a,...
5a,... Are opened in alignment with the other pin insertion holes 3a, 3a,.

The backup pin 6 is made of metal, hard resin or the like, and has a reduced diameter portion 6a of a predetermined length which is slidably fitted in the pin insertion hole 3a at the lower end. The backup pin 6 has a through hole 6b extending in the axial direction.

Next, a method of using the work backup apparatus 1 configured as described above will be described.

First, the decompression case 4 is set at a printing position of a screen printing machine (not shown), and the vacuum pump P is connected to the suction hole 4c. Then, the pedestal body 3 is placed on the decompression case 4.
Is set, and the guide plate 5 corresponding to the circuit board W to be backed up is placed on the upper surface of the base body 3. Then, the reduced diameter portions 6a of the backup pins 6 are inserted into the pin insertion holes 3a, 3a,... Of the pedestal main body 3 which are aligned with the guide holes 5a, 5a,. Are attached to the base body 3.

When the circuit board W is conveyed to a predetermined position above the work backup device 1 by a transfer device (not shown), the circuit board P is transferred to the backup pins 6 and 6 of the work backup device 1 by a holding device (not shown). ,
・ ・ It is pressed against the upper surface of. Further, the vacuum pump P is operated, and the pressure inside the decompression chamber 7 is reduced, so that
The circuit board W is sucked onto the backup pins 6, 6,... By the negative pressure supplied through the through holes 6b.

Then, cream solder is printed on the surface of the circuit board W by a screen printing machine. Circuit board W
Are fixed on the backup pins 6, 6,... By not only the holding device but also the vacuum pump P,
It does not move during printing, and printing can be performed with high accuracy. Note that the circuit boards W having different backup positions
When printing is performed on the backup pins 6, 6, ...
Is removed from the pedestal main body 3, the guide plate 5 is replaced with one corresponding to the circuit board W, and the backup pin 6,
6 are inserted into the pedestal main body 3 and mounted.

It should be noted that the present invention is not limited to the above embodiment, and various changes can be made.

For example, in the above-described embodiment, the case where the present invention is applied to a device that performs backup for cream solder printing has been described. However, the present invention is applied to a device that performs backup for mounting electronic components and other processes. You can also.

The work to be backed up is not limited to a circuit board.

Various other changes can be made without departing from the spirit of the present invention.

[0025]

As described above, the work backup device of the present invention has a guide formed on the upper surface of the pedestal so as to open the pin insertion hole at the backup position of the corresponding work and to cover the other pin insertion holes. By mounting the board and inserting and mounting the backup pin, erroneous mounting of the backup pin can be prevented. Further, by replacing the guide plate, it is possible to cope with a plurality of types of works.

Further, in the work backup device according to the second aspect, the work is attracted to the backup pin by the negative pressure supplied through the through hole of the backup pin, so that the reliability of fixing the work is improved. .

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a work backup device 1 according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the work backup device 1.

[Explanation of symbols]

 Reference Signs List 1 work backup device 2 pedestal 3 pedestal body 4 decompression case 5 guide plate 6 backup pin 7 decompression chamber P vacuum pump (decompression means) W circuit board (work)

Claims (2)

[Claims] 1. A pedestal having a horizontal upper surface, a plurality of guide plates formed one by one for each of a plurality of types of works having different backup positions, and mounted on the upper surface of the pedestal, and a plurality of backup plates The pedestal has a number of pin insertion holes for receiving the backup pin in the axial direction and vertically supporting the backup pin in a state where the backup pin protrudes from the upper surface of the pedestal by a predetermined height. The guide plate is formed so as to open the pin insertion hole at the backup position of the corresponding work and to cover the other pin insertion holes, and to place any one of the plurality of guide plates on the upper surface of the pedestal. The backup pin is inserted and mounted in the opened pin insertion hole while being mounted on the Backup device. 2. Each of the backup pins has a through hole extending in an axial direction, and a decompression chamber communicating with each of the pin insertion holes is formed inside the pedestal, and decompression means for decompressing the inside of the decompression chamber is provided. The work backup device according to claim 1, wherein the work backup device is provided.