JPH0780292B2 - Positioning mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] When screen printing is performed on a rectangular plate surface such as a printed board, for example, the rectangular plate is positioned at a predetermined position so that it can be easily mounted and stably and accurately positioned. For the purpose of a simple positioning mechanism, a pallet 1 having a recess 11 having a sufficient width for accommodating a rectangular plate such as a printed board and a hole 16 provided in the bottom surface of the recess, and press-fitted into the hole 16 in the bottom surface of the recess. And a cylindrical spring 4 made of a metal having springiness, the concave portion 11 has right-angled reference sides 12 and 13 where two adjacent sides intersect at a corner portion 14, and the hole 16 on the bottom surface of the concave portion is a corner portion 14 of the concave portion. And two of the two adjacent sides of the rectangular plate that abut the right reference side of the recess.
A right-angled surface 236 on the line connecting the right-angled surface 23 where the sides 21 and 22 intersect
The cylindrical spring 4 is provided in the vicinity of the outer side of the cylindrical bottom portion 44, the cylindrical body portion 43, the flange-shaped protruding portion 41 on the opening side, and a plurality of vertical shapes reaching from the protruding portion to the bottom portion through the cylindrical body portion. The square plate is composed of slits 42, and the two adjacent sides of the square plate are right-angled reference sides 12 and 13 of the recess.
Two sides 21 and 22 that make contact with each other and form a right-angled surface 23 facing each other.
Is the cylindrical body of the cylindrical spring 4 press-fitted into the hole 16 of the recess 11.
Within one slit of 43, it is held in the concave portion of the pallet by pressing against the side surface of the protruding portion.

[Industrial application field]

The present invention relates to a positioning mechanism for various rectangular plates such as printed boards.

[Conventional technology]

There is a screen printing method for display printing on a rectangular plate-shaped printed board surface used for electronic and communication.

The screen printing apparatus used for this purpose must position and fix the printed board at a predetermined position for printing. The apparatus is provided with a pallet for positioning and fixing the printed board, and the printed board is housed in the recess of the pallet and abutted on the corner of the recess for positioning. Then, as a means for fixing the printed board at that position, it is considered that the printed board is vacuum-sucked from the hole on the lower surface of the concave portion of the pallet, but the printed board is provided with through holes, notches and the like. If not effective.

Therefore, the positioning mechanism shown in FIG. 7 has been conventionally used.

That is, in FIG. 7, 1 is a pallet, 11 is a concave portion for accommodating a printed board, 12 and 13 are right reference sides of the concave portion.
Leaf springs 3 are provided on the two sides facing 13 respectively. Then, the adjacent two sides of the printed board are fitted into the recesses 11 of the pallet 1 so as to abut the right-angled reference sides 12 and 13 of the recesses 11, and the two sides of the abutted two sides of the printed board face each other. The leaf springs 3 attached to the recesses 11 of the pallet press the sides 21 and 22 to push the printed board into the recesses 11 of the pallet 1.
It is positioned and fixed to.

[Problems to be solved by the invention]

In the above-mentioned conventional positioning mechanism, since two leaf springs are used, a space is required, and attachment and detachment of the leaf spring by changing the size of the printed board is troublesome, and the printed board is lifted because it is fixed only by the pressing frictional force. There was a problem that it came off easily.

[Means for solving problems]

According to the present invention, the above problem is caused by the present invention. The pallet 1 having the recess 11 having a sufficient width for accommodating a rectangular plate such as a printed board and the hole 16 provided on the bottom surface of the recess, and the hole 16 on the bottom surface of the recess.
And a cylindrical spring 4 made of a metal having a spring property that is press-fitted into the concave portion 11. The concave portion 11 is provided with right-angled reference sides 12 and 13 where two adjacent sides intersect at a corner portion 14, and the hole 16 on the bottom surface of the concave portion is The corner portion 14 and the adjacent two sides of the rectangular plate that are in contact with the right reference side of the recess are opposed to each other.
The cylindrical spring 4 is provided close to the outside of the right-angled surface 23 on a line connecting the right-angled surfaces 23 where the sides 21 and 22 intersect, and the cylindrical spring 4 has a cylindrical bottom portion 44, a cylindrical main body portion 43, and a flange-shaped protruding portion 41 on the opening side. And a plurality of vertical slits 42 reaching from the protrusion to the bottom through the cylindrical main body. The rectangular plate has two adjacent sides which are right reference sides 12 and 13 of the recess.
Two sides 21 and 22 that make contact with each other and form a right-angled surface 23 facing each other.
Is the cylindrical body of the cylindrical spring 4 press-fitted into the hole 16 of the recess 11.
In one of the slits of 43, it is solved by a positioning mechanism characterized in that it is held in the recess of the pallet by pressing against the side surface of the protrusion.

[Action]

Adjacent two sides 12 and 13 of the recess 11 of the pallet 1 serve as a reference part when mounting a rectangular plate, and the intersection of the sides 12 and 13 is a corner part.
It is 14.

Also, the intersection of the two sides 21 and 22 facing each other when the two adjacent sides of the square plate to be attached are in contact with this right-angled reference side is a right-angled surface 23, but on the line connecting the corner portion 14 and the right-angled surface 23,
On the outside of the right-angled surface 23, a recessed hole 16 is provided closely. Then, the cylindrical spring 4 is press-fitted into the hole 16 of this concave portion, but the right-angled surface 23 of the rectangular plate is inserted into the slit of the cylindrical spring while the two sides of the rectangular plate are in contact with the right-angled reference sides. Press in against the spring pressure. Since the cylindrical spring has multiple slits, the main body and projecting parts are spring deformed, and the two sides of the rectangular plate
21 and 22 are pressed against the side surface of the protrusion 41 in the slit of the cylindrical spring 4.

Therefore, the two sides 21 and 22 of the square plate receive the pressing force in the direction of the right reference side of the recess, and the square plate is easily and stably fixed in the recess of the pallet with the two sides pressed against the right reference side. To be done.

The positions of the holes of the recesses are determined in correspondence with the positions of the right-angled surfaces of the rectangular plate to be attached, but holes are formed at predetermined intervals on the line connecting the right-angled surfaces 23 and the corners 14 of one rectangular plate. Thus, it can be used for mounting and fixing rectangular plates of respective sizes of a predetermined standard.

〔Example〕

Hereinafter, the present invention will be specifically described by way of examples with reference to the drawings.

1 to 5 show an embodiment of the present invention. In addition, in this embodiment, in order to facilitate understanding as a rectangular plate, the case of a printed board is described as in FIG. 7, and the same reference numerals are given to the same parts.

First, in FIG. 1, a concave portion 11 for accommodating a printed board is provided in a pallet 1 for positioning the printed board of a screen printing device (overall view is omitted). The concave portion 11 has a sufficient width for accommodating various printed boards, and a right-angled reference side 1 that abuts two adjacent sides of the printed board 2.
2, 13 and a corner portion 14 formed by two sides 12, 13 are arranged.
Further, a right-angled surface 23 is formed on the line connecting the right-angled surface 23 of the printed board and the corner 14 when the printed board 2 is mounted in this recess.
A hole 16 is provided near the outside of the cylindrical spring 4, and the cylindrical spring 4 is press-fitted into the hole 16.

That is, this part is enlarged to 2 in Fig. 2 as A surrounded by the dotted circle.
As is apparent from FIG. 3 shown in the BB cross section of FIG.
16 is formed in the portion 15 of the recess 11 of the pallet 1, and the cylindrical spring 4 is press-fitted into this hole 16. The position of this hole is a corner
It is located on the line connecting 14 and the right-angled surface 23 of the rectangular plate and close to the outside of the right-angled surface 23.

As shown in the perspective view of FIG. 4 and the plan view of FIG. 5, the cylindrical spring 4 includes a cylindrical main body portion 43, a bottom portion 44 at one end, a protruding portion 41 protruding like a flange toward the opening side, and a protruding portion. It comprises a plurality of axial slits 42 extending from 41 to a bottom portion 44 through a cylindrical main body portion 43, and slits 42 'which are also large notches. The material is spring steel or a metal having spring properties.

The slit 42 'is slightly narrower than the 90 degree angle as shown in detail in FIG. The cylindrical spring 4 is positioned so that the side surface of the slit 42 'of the protrusion 41 when the main body 43 is press-inserted into the hole 16 presses the sides 21, 22 of the printed board 2 as shown in FIG. ing. At this position, the slit 42 'is widened to approximately 90 degrees by placing the other two sides of the printed board 2 on the right reference sides 12 and 13 of the recess 11 and placing them in the recess 11. The cylindrical spring 4 is twisted in the direction of the slit 42.

With the above configuration, the operation will be described next. The printed board 2 is placed in the recess 11 as described above. At this time, specifically, the right-angled surface 23 formed by the sides 21 and 22 is first. Fit the slit 42 'into the printed board 2 and incline the printed board 2, and push down in the direction of the corner 14 while lowering the opposite corners of the other two sides, and widen the slit 42' to form a right angle reference side.
Place it so that it touches 12,13.

The side surface of the slit 42 'of the protruding portion is the side 21, 2
Press 2 in each direction. These composite vectors are in the direction of the corner portion 14, and the printed board 2 is stably pressed against the right-angled reference sides 12 and 13 for positioning.

When the predetermined screen printing is performed on the printed board 2 and the printed board 2 is removed, the order may be reversed from the above-described placement procedure.
That is, the printed board can be easily removed by applying a force in the direction of separating the printed board from the right reference sides 12 and 13. Because of
It is very convenient to provide the pallet 1 with right-angled reference sides 12, 13 provided with notched recesses such as 17, 18 (FIG. 1) so that fingers or instruments can be inserted.

The projecting portions 41 on both sides of the slit 42 'of the cylindrical spring 4 are thin flange-shaped side surfaces and are expanded by the sides 21 and 22, and as a result, they are pressed against the surfaces of the sides 21 and 22 so as to bite into them. Because of this, the printed board 2 placed in the recess 11 is fixed and cannot be easily removed.

Another embodiment of the cylindrical spring according to the present invention is shown in plan view in FIG. Although the slits 42 'are all equal in this embodiment, they have an appropriate wide width and can be elastically expanded to the spread angle by the pressure contact of the right-angled surface 23 of the printed board 2. However, their action and effect are as follows. It is equivalent to that in FIG. According to this embodiment, the tip portion 41 'of the protruding portion 41 bites largely into the side surface of the printed board.

The concave portion 11 is provided with a large number of holes 16 so that the printed boards 2 of various sizes can be placed and positioned with respect to the sides 12 and 13 as a reference, and the cylindrical spring 4 can be replaced to cope with any situation. It is possible. The operation is extremely easy.

In the above-described embodiment, the printed board 2 is provided for easy understanding.
However, the present invention is not limited to such a case and can be applied to ceramics, glass, metals, resins and the like as long as it is a rectangular plate, and is not limited to printing,
It can be applied to various processing, testing, and inspection equipment. The right-angled reference side also includes, for example, that two round pins are planted on each side and the side formed by the tangent line of those pins can be used as a reference.

〔The invention's effect〕

As described above, according to the present invention, the rectangular plate can be surely positioned by the pallet formed by the combination of the concave portion having the right angle reference side and the hole and the one cylindrical spring. Its practical effect is remarkable.

[Brief description of drawings]

1 is a plan view of an embodiment of the present invention, FIG. 2 is an enlarged view of part A of FIG. 1, FIG. 3 is a sectional view taken along line BB of FIG. 2, FIG. 4 is a perspective view of a cylindrical spring, 5 is a plan view, FIG. 6 is a plan view of another embodiment of the cylindrical spring, and FIG. 7 is a plan view of a conventional positioning mechanism. In the figure, 1 is a pallet, 2 is a printed board as a square plate, 4 is a cylindrical spring, 11 is a recess, 12 and 13 are right-angled reference sides, 1
4 is a corner, 16 is a hole, 23 is a right-angled surface, 41 is a protrusion, 42 is a slit, 43 is a main body, and 44 is a bottom.

Claims (1)

[Claims] 1. A recess 11 having a sufficient width for accommodating a rectangular plate such as a printed board and a hole 16 provided in a bottom surface of the recess.
And a cylindrical spring 4 made of a metal having a spring property and press-fitted into a hole 16 on the bottom surface of the recess. The recess 11 has right-angled reference sides 12 and 13 where two adjacent sides intersect at a corner 14. The holes 16 on the bottom surface of the recess face the corner portion 14 of the recess and the two adjacent sides of the rectangular plate that abut the right reference side of the recess.
The cylindrical spring 4 is provided near the outside of the right-angled surface 23 on the line connecting the right-angled surfaces 23 where the sides 21 and 22 intersect, and the cylindrical spring 4 has a disc-shaped bottom portion 44, a cylindrical main body portion 43, and a flange-shaped protruding portion on the opening side. 41 and a plurality of vertical slits 42 that reach the bottom from the protrusion through the cylindrical body. The square plate has two adjacent sides which are the right reference sides 12 and 13 of the recess.
Two sides 21 and 22 that make contact with each other and form a right-angled surface 23 facing each other.
Is the cylindrical body of the cylindrical spring 4 press-fitted into the hole 16 of the recess 11.
A positioning mechanism characterized by being held in the concave portion of the pallet by being pressed against the side surface of the protruding portion in one slit of 43.