JPH09192972A - Positioning jig for junction with heating process and positioning method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely hold the relative positions of facing positioning parts of plate-like members, so as to seal them, by making a material of a part for forming a joining objective part member fixing surface of a holding body by a material having the coefficient of thermal expansion equal to the coefficient of thermal expansion of the joining objective member. SOLUTION: All members are heat-expanded during heating, however, since a plate 1 and holding blocks 12, 13 have the same coefficient of thermal expansion, they are expanded by the same ratio, and the relative positions of a lower plate 1 and an upper plate are accurately maintained. Even if an assembling stand is expanded, the holding blocks 12, 13 are pressed to strike parts 11a, 11b, 11c, 11d by springs of pressing piece blocks 14, 15 and regulated by the reference surfaces of the strike parts, and therefore, the relative positions of both sides is not deviated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positioning jig for assembling precision members involving a heating step, and more particularly to a positioning jig and a positioning method for heating and bonding two plate-shaped members facing each other with a frame portion interposed therebetween. Regarding

[0002]

2. Description of the Related Art As an example of this type of assembling method which has been conventionally used, there is a method disclosed in JP-A-61-64036. FIG. 8 is a cross-sectional view showing a method of positioning and adhering a plurality of electrode plates of an image display device by this technique. In the figure, reference numeral 81 is a firing jig, and 81a is a firing treatment for loading and adhering electrode plates. The baking surface of the tool 81, 82 is an abutting portion which is provided on the baking surface 81 and serves as a reference surface for positioning a plurality of electrode plates, 83 is an electrode plate to be bonded, and 84 is a weight for bonding. Is a stamper, 85 is a stamper and abutting portion 82
It is a ceramic ball for preventing uneven load due to friction with.

According to this method, a plurality of electrode plates 83 for controlling an electron beam of a flat image display device using an electron beam are used.
Is a method for adhering with high positional accuracy via a spacer arranged between them. An abutting portion 82, which serves as a positioning reference surface, is provided at the end of the firing surface that sandwiches the lowest intersection point of the end surfaces of the firing surface 81a that is inclined with respect to the firing jig 81. Abutting portion 82
The two reference end faces of the electrode plate 83 sandwiching the spacer are orthogonally aligned and brought into contact with the reference face of (1), and the stamper 84 serving as a weight is placed. The stamper 84 is in contact with the abutting portion 82 via the ceramic balls 85 in order to reduce frictional resistance.

The component force of the vertical force Z based on the weight of the stamper 84 and the electrode plate 83 in the direction perpendicular to the firing surface 81a becomes the force for pressing the electrode plate 83 and the spacer,
Since the component force in the parallel direction serves as a force for pressing the electrode plate 83 against the abutting portion 82, it is placed in a heating device in a state where it is incorporated in the firing jig 81 and heated, and even if each portion undergoes different thermal expansion, it is positioned. The precision of alignment is retained.

[0005]

However, in the method disclosed in Japanese Patent Laid-Open No. 61-64036 described above, it is necessary that the end surface of the plate to be bonded be the reference surface for positioning. For that, the end surface of the plate is precisely processed,
It is necessary to accurately define the relative position with the alignment section.

A method of marking an alignment portion and an alignment mark at the same time and performing positioning with the alignment marks provided on each of the target plates is as follows:
Although the plate alignment is not required to be processed and the positional accuracy is easily obtained, the above-described alignment method cannot be applied.

Further, in the abutting by the component force of its own weight using the inclined surface, there is a possibility that the abutting may not be surely performed due to the resistance due to the frictional force between the materials on the firing surface depending on the material. The present invention relates to a positioning jig and a positioning method for precisely assembling two plate-shaped members at a predetermined relational position using a positioning mark in an assembly of a precision member involving a heating step. To provide.

[0008]

A positioning jig for bonding involving a heating step according to the present invention is a positioning jig for precisely bonding a plurality of members to be bonded at a predetermined position in the bonding involving a heating step. The joining target member is a plurality of holding bodies that are aligned and fixed so as to be aligned on a predetermined joining surface when the jig is combined, and a plurality of holding bodies at predetermined relational positions for joining. The material of the member, which is composed of the assembly base for combining and holding and fixing, and which constitutes the joining target member fixing surface of the holding body, is a material having a thermal expansion coefficient substantially equal to the thermal expansion coefficient of the joining target member.

The members to be joined are a pair of plate-like members and a frame member for joining the plate-like members to maintain a predetermined distance, and the pair of holders for holding and fixing the plate-like members are orthogonal to each other. A reference surface which is provided on the two end surfaces and serves as a reference for aligning the plate-shaped members and positioning the pair of holders on the assembly table, and a mounting surface and a mounting member for holding and fixing the plate-shaped members. The assembly table has a horizontal portion on which a pair of holding bodies sandwiching a frame member is placed, and an outer edge portion of the horizontal portion which is orthogonal to each other, and a reference plane perpendicular to the horizontal portion and mutually orthogonal. And a pressing mechanism including an elastic member for press-contacting the reference surfaces of the mounted pair of holding portions with the reference surfaces of the abutting portions.

A positioning method for joining with a heating step according to the present invention is a positioning method for precisely joining a pair of plate-shaped members at a predetermined relational position with a frame member interposed therebetween in the joining with a heating step. And made of a material having a coefficient of thermal expansion substantially equal to that of the plate-shaped member and provided on two orthogonal end faces to align the plate-shaped member and position the pair of holders on the assembly table. A reference point for alignment provided on the plate-shaped member is predetermined with respect to a reference plane that serves as a reference, a mounting surface for holding and fixing the plate-shaped member, and a reference plane orthogonal to the holding body having the mounting member. The pair of plate-shaped members are respectively held and fixed to the holding body by the mounting members so that the holding body is placed, and the horizontal portion is provided at the outer edge portion of the horizontal portion orthogonal to the horizontal portion. And abutting parts and mounting surfaces with reference planes that are perpendicular to each other A holding body having a lower plate-shaped member fixed to the upper surface is attached to a horizontal portion of an assembly table having a pressing mechanism including an elastic member for pressing the reference surfaces of the paired holding portions to the abutting portions. , The reference member is placed so that its reference surface comes into contact with the reference surface of the abutting portion, and the frame member with the adhesive applied on both surfaces is placed at a predetermined position on the placed plate member, On the upper surface of the member, mount the holder, which has the upper plate-shaped member fixed to the lower surface, so that the reference surface of the holder contacts the reference surface of the abutting part, and use the pressing mechanism to hold the pair of mounted holders. The positioning jigs are assembled by elastically pressing the reference surfaces of the parts orthogonal to the reference surfaces of the abutting parts, and the assembled positioning jigs are heated by the heating mechanism under predetermined conditions to melt the adhesive material. The adhesive is solidified by cooling to bond the pair of plate-shaped members and the frame member.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention can be widely applied to assembling a precision member involving a heating step, but is used for precisely assembling two plate-shaped members at a predetermined relational position through a mounting frame. A positioning jig and an assembling method for frit-joining two plate surfaces of flat soda lime glass for display to a predetermined relational position through a frame will be specifically described.

FIG. 1 is a schematic perspective view of a positioning jig according to an embodiment of the present invention, and FIG. 2 is an assembly target of the jig.
3 is a schematic perspective view of the glass plate and the frame before assembly, FIG.
FIG. 4 is a schematic perspective view of the jig assembly target after assembling two glass plates and a frame, and FIG. 4 is a schematic perspective view of a holding block constituting the jig. The state where the lower plate is attached, (b) the state where the upper plate is attached to the upper holding block, FIG. 5 is a top view showing the alignment of the holding block and the plate, (a) shows the lower block, and (b) shows The upper block is shown. FIG. 6 is a schematic side view near the plate fixing portion of the holding block, and FIG. 7 is a schematic side view of the positioning jig.

In the drawing, reference numeral 1 is a lower plate which is a plate-like member,
1a and 1b are alignment marks of the lower plate, 1c is a grid marked on the lower plate surface, 2 is a plate-shaped upper plate, 2a and 2b are alignment marks of the upper plate, and 2c is marking on the upper plate surface Grid, 3
Is a frame that is a frame member for adhering the upper plate 2 and the lower plate 1 with a space therebetween, 3a is a frame upper surface that is adhered to the upper plate 2, and 3b is a frame lower surface that is adhered to the lower plate 1.

Reference numeral 11 is an assembly table, 11a is an abutting portion a and 11b which serve as a reference surface for positioning, and abutting portions b and 11 are abutting portions.
Reference numeral c is an abutting portion c, 11d is an abutting portion d, 12 is a lower holding block which is a holding body for holding the lower plate, and 12a.
Is a hole provided in the lower surface of the lower holding block 12, 13 is an upper holding block that is a holding body for holding the upper plate, and 14
Abuts the holding blocks 12 and 13 on the abutting portions 11c and 11d.
A first pressing piece block for pressing the holding blocks 12, 13 to the abutting portions 11a, 11b, 15a for an upper pressing piece, 15b for a lower pressing piece, and 15c. Is the top pusher 15
An upper spring for pressing a, a lower spring 15d for pressing the lower pressing piece 15b, a body 15e of the pressing piece block 15, and 15e.
A pressing plate 15f supports the upper spring 15c and the lower spring 15d.

Reference numeral 16 is a plate fixing piece for fixing the plates 1 and 2 to the holding blocks 12 and 13, 17 is a fixing bolt for fixing the plate fixing piece 16 to the holding blocks 12 and 13, and 18 is a bolt. A nut screwed to 17 and a spring 19 for elastically fixing the plate fixing piece in combination with the bolt 17 compose an attaching member.

The positioning jig of the present invention comprises an assembly table 11, a lower holding block 12, an upper holding block 13, a first pressing piece block 14 and a second pressing piece block 15, and the assembly table 11 has its upper surface. Abutting portions having reference planes that stand upright at a right angle with respect to the upper surface are provided at the two outer edge portions that are orthogonal to each other. Further, the reference surfaces of the abutting portions provided on the two outer edge portions are machined so as to be perpendicular to each other with high accuracy. In this embodiment, 2 are provided at each outer edge.
A total of four abutting portions 11a, 11b, 11c,
Although 11d is provided, one wide abutting portion may be provided at each end.

Lower holding block 12 and upper holding block 13
The two end faces which are orthogonal to each other form a reference plane for positioning, and the lower plate 1 and the upper plate 2 mounted on the respective mounting surfaces have bolts 17 through plate fixing pieces 16,
Holding blocks 12, 13 by nuts 18 and springs 19
It is accurately and elastically fixed in place.

The two push piece blocks 14 and 15 are fixed on the assembly table 11 by fastening means (not shown).
Two reference end faces of the lower holding block 12 and the upper holding block 13 mounted on the upper side with the frame 3 sandwiched therebetween are used as reference faces of the abutting portions 11a, 11b, 11c, 11d facing each other.
The built-in upper pressing piece 15a, lower pressing piece 15b, upper spring 15c, and lower spring 15d elastically press from the opposite end surfaces.

As shown in FIGS. 2 and 3, the purpose of this assembling work is to accurately align the grating 1c marked on the lower plate 1 and the grating 2c marked on the upper plate 2 with the frame 3 interposed therebetween. The alignment marks 1a, 1b (∘) of the lower plate 1 and the alignment marks 2a of the upper plate 2 whose positional relationship with the gratings 1c, 2c is precisely defined. 2b (+)
Accurately align the center with the frame 3 which is pre-baked with frit glass for adhesion and is preliminarily baked on the upper surface 3a and the lower surface 3b, and fixed.
Bonding is performed by heating to ℃. Since the positions of the grids 1c and 2c and the positions of the end faces of the plates 1 and 2 are not precisely defined, it is not possible to perform positioning using the end faces of the plates as reference planes as in the above-mentioned conventional example.

Next, a method of attaching the plates 1 and 2 to the blocks 12 and 13 will be described with reference to FIGS. 4, 5 and 6. The plates 1 and 2 are elastically fixed to the blocks 12 and 13 by means of bolts 17, nuts 18 and ceramic springs 19 via plate fixing pieces 16 as shown in FIG. The reason for elastically fixing is to prevent distortion due to the difference in elongation during heating of members having different expansion coefficients.
In the present embodiment, when the lower plate 1 and the upper plate 2 are assembled, the plate fixing pieces 16 have the opposite outer edge portions at orthogonal positions so that the plate fixing pieces 16 do not interfere with each other.
The nut 18 is housed in a hole 12a provided in the holding block 12 so as not to be exposed.

The alignment between the blocks 12 and 13 and the plates 1 and 2 is as shown in FIG. 5, and the lower plate 1 uses the intersection 0 (0, 0) of the orthogonal reference planes of the lower holding block 12 as the origin of the coordinates. Align the alignment mark 1a with coordinates (x1,
y2) with the alignment mark 1b at the coordinates (x2, y1)
The plate 1 is moved with a tool microscope (not shown) so as to be aligned with a predetermined position. Further, the upper plate 2 uses the alignment mark 2a as the coordinate (x
1 ', y2'), the alignment mark 2b is coordinated (x
2 ', y1') so that the plate 2 is moved by a tool microscope (not shown) so as to be aligned with a predetermined position. Here naturally
x1 = x1 'x2 = x2' y1 = y1 'y2 = y
It is 2 '.

Through the above operations, the plates 1 and 2 are accurately fixed at predetermined positions from the reference end faces of the holding blocks 12 and 13.

Next, the assembly of the positioning jig will be described with reference to FIGS. 1 and 7. First, the lower holding block 12 to which the lower plate 1 is fixed is mounted on the assembly table 11 with reference end faces having the abutting portion 11a, the abutting portion 11b, and the abutting portion 11, respectively.
c, abut on the reference surface of the abutting portion 11d so as to abut and place. Next, the frame 3 having both surfaces preliminarily fired with frit glass is brought into contact with a predetermined position of the lower plate 1. After that, the upper holding block 1 to which the upper plate 2 is fixed
3 is turned upside down so that the reference end faces are abutting portion 11a and abutting portion 1 on the frame 3 with the upper plate 2 as the lower surface.
1b, the abutting portion 11c, and the reference surface of the abutting portion 11d are abutted and placed so as to abut. In this state, the alignment marks 1a, 1b, 2a, 2 of the plates 1, 2
The coordinate x1 of b is x1 ', x2 is x2', and y1 is y.
1'and y2 are equal to y2 ', so upper and lower plates 1, 2
It goes without saying that the positions of the grids 1c and 2c of 1 are correctly aligned.

In this state, the lower pressing piece 15c of the pressing piece block 15 is moved to the lower holding block 12 by the ceramic spring 15d, and the upper pressing piece 15a is moved to the ceramic spring 15c.
The abutting portion 1 that abuts the upper holding block 13 by
Press on 1a, 11b. Similarly, push piece block 14
Presses the lower holding block 12 and the upper holding block 13 against the abutting portions 11c and 11d that abut against each other.

The material of the positioning jig may have sufficient strength if it is bonded at room temperature. However, when heat treatment is performed, it is not only heat resistant but also room temperature due to the difference in thermal expansion between the object to be assembled and the jig. It should be taken into account that the positioning position at can be displaced due to high temperature. The coefficient of thermal expansion of soda lime glass, which is the material for plates 1 and 2, is 81 × 10 ⁻⁷ , the plate length is 300 mm, the room temperature is 20 ° C., and the heating temperature is 45.
At 0 ° C, the thermal expansion is 81 × 10 ^-7 × (450
-20) x 300 mm = about 1 mm, which is a large value. If the coefficients of thermal expansion of the plates 1 and 2 and the holding blocks 12 and 13 are different, the contact position between the plates 1 and 2 and the holding blocks 12 and 13 will change except for a part, so the relative position of the lower plate 1 and the upper plate 2 Is also likely to fluctuate.

In the present invention, this problem is solved by the plates 1, 2
The problem was solved by manufacturing the holding blocks 12 and 13 that are related to the positional deviation with respect to the plates 1 and 2 from the soda-lime glass made of the same material.

The positioning jig, in which the plates 1 and 2 are fixed to each other through the frame 3 in a predetermined positional relationship, is put into a firing furnace and heated so that the temperature of the whole is uniformly changed. Although all members undergo thermal expansion during heating, since the plates 1 and 2 and the holding blocks 12 and 13 have substantially the same coefficient of thermal expansion, they expand at the same ratio, and the relative positions of the lower plate 1 and the upper plate 2 are accurate. Maintained.

Since the holding blocks 12 and 13 are pressed against the abutting portions 11a, 11b, 11c and 11d by the springs of the push piece blocks 14 and 15 no matter how the assembly table 20 is expanded, the holding blocks 12 and 13 are pressed against the abutting portions. The relational position between the two will not be displaced by being restricted by the reference plane. Therefore, the assembly table 20
The metal material (stainless steel, brass, etc.) that can be easily processed and is low in cost can be used, and in this embodiment, it is made of stainless steel. The difference in thermal expansion of the plate fixing piece 16 made of a metal material is absorbed by the spring 19.

In this way, the lower plate 1 and the upper plate 2 do not shift in position due to thermal expansion, and the temperature is 450 ° C.
The frit glass that has been heated to and temporarily calcined on the upper and lower surfaces of the frame 3 is melted, and the frit glass is solidified by the subsequent cooling, so that the frame 2 is joined and sealed to the lower plate 1 and the upper plate 2. When the cooling is completed, it is taken out of the firing furnace and the positioning jig is disassembled to obtain the finished product shown in FIG.

In the above description, the holding block 12,
Although the material of 13 is the same blue glass as that of the plates 1 and 2, it may be composed of a material having substantially the same coefficient of thermal expansion as the material of the plates 1 and 2 as a target, for example, special ceramics.

Further, in order to accurately seal the lower plate 1 and the upper plate 2 in the height direction with the positioning jig assembled, not only the own weight of the upper holding block 13 and the upper plate 2 but also the upper holding block 13 is held. A separate weight may be placed on top of.

[0032]

As described above, according to the present invention, in the positioning jig for accurately assembling the two plate-shaped members at the predetermined relational positions through the mounting frame in the joining process involving the heating process, The plate-shaped member is fixed so that the alignment portion of the plate-shaped member is arranged at a predetermined relational position from the reference end-face of the holding block using the alignment mark of the plate-shaped member, and the end face of the holding block is used as the reference plane. Since the assembly alignment is performed, there is an effect that accurate alignment can be performed even if the relative position between the alignment portion of the plate member and the end face of the plate member is not specified.

Therefore, it is not necessary to precisely and precisely process the end surface of the plate-like member, and the alignment can be performed using the alignment mark marked on the plate-like member at the same time as the alignment portion, so that the cost can be reduced.

Further, the holding block for holding the plate member is made of a material having substantially the same coefficient of thermal expansion as the plate member,
450 ° C, which is the firing temperature of frit glass that is an adhesive material
2 plate-shaped members and two sets of holding blocks expand at the same rate and regulate with reference to the end faces of the holding blocks, the relative positions of the facing alignment portions of the two plate-shaped members The effect of being retained and sealed with high precision was obtained.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a positioning jig according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view of two glass plates and a frame, which are objects of assembly of a jig, before assembly.

FIG. 3 is a schematic perspective view after assembly of two glass plates and a frame, which are objects of assembly of a jig.

FIG. 4 is a schematic perspective view of a holding block forming a jig. (A) shows a state in which the lower plate is attached to the lower holding block. (B) shows a state in which the upper plate is attached to the upper holding block.

FIG. 5 is a top view showing the alignment of the holding block and the plate. (A) shows a lower block. (B) shows an upper block.

FIG. 6 is a schematic side view in the vicinity of a plate fixing portion of a holding block.

FIG. 7 is a schematic side view of a positioning jig.

FIG. 8 is a cross-sectional view showing a method of positioning and adhering a plurality of electrode plates of a conventional image display device.

[Explanation of symbols]

 1 lower plate 1a, 1b alignment mark 1c lattice 2 upper plate 2a, 2b alignment mark 2c lattice 3 frame 3a frame upper surface 3b frame lower surface 11 assembly table 11a abutting portion a 11b abutting portion b 11c abutting portion c 11d abutting Abutting part d 12 Lower holding block 12a Hole 13 Upper holding block 14 First pushing piece block 15 Second pushing piece block 15a Upper pushing piece 15b Lower pushing piece 15c Upper spring 15d Lower spring 15e Body 15f Holding plate 16 Plate fixing piece 17 Bolt 18 Nut 19 Spring

Claims (3)

[Claims] 1. A positioning jig for precisely joining a plurality of joining target members at a predetermined position in a joining process involving a heating step, wherein the joining target member is a predetermined jig when the jigs are combined. A plurality of holders that are aligned and fixed so as to be aligned on the joint surface of the holder, and an assembly table that combines and holds the plurality of holders at a predetermined relational position for joining, and the holder. The positioning jig, wherein the material of the member constituting the joining target member fixing surface is a material having a thermal expansion coefficient substantially equal to the thermal expansion coefficient of the joining target member. 2. The positioning jig according to claim 1, wherein the joining target member is a pair of plate-like members and a frame member for joining to the plate-like members to maintain a predetermined distance, The pair of holding bodies for holding and fixing the plate-shaped members are provided on two end faces that are orthogonal to each other, and serve as a reference for positioning the plate-shaped members and positioning the pair of holding bodies on the assembly table. A surface, a mounting surface for holding and fixing the plate-shaped member, and a mounting member, and the assembly table is a horizontal portion on which the pair of holding bodies sandwiching the frame member are placed, and a crossing of the horizontal portions. An abutting portion provided on the outer edge portion having a reference surface that is perpendicular to the horizontal portion and mutually orthogonal to each other, and the reference surfaces of the mounted pair of holding portions are respectively the reference surfaces of the abutting portions. Press including an elastic member for pressure contact with A positioning jig having a mechanism. 3. A positioning method for precisely joining a pair of plate-shaped members at a predetermined relational position with a frame member interposed therebetween in a joining process involving a heating step, wherein the thermal expansion coefficient of the plate-shaped members is approximately the same as that of the plate-shaped members. A reference surface, which is made of a material having the same coefficient of thermal expansion, is provided on two orthogonal end faces and serves as a reference for the alignment of the plate-like members and the positioning of the pair of holding bodies on the assembly table, and the plate. So that a reference point for alignment provided on the plate-shaped member is at a predetermined position with respect to the reference plane orthogonal to the holding body having a mounting surface for holding and fixing the plate-shaped member and the mounting member. A pair of the plate-shaped members are respectively held and fixed to the holding body by the mounting member, a horizontal portion on which the holding body is mounted, and an outer edge portion of the horizontal portion which is perpendicular to the horizontal portion. Abutment and mounting with reference planes at right angles to each other The lower plate-shaped member is fixed to the upper surface of the horizontal portion of the assembly table having a pressing mechanism including an elastic member for pressing the reference surfaces of the pair of holding portions to the abutting portion. The holding body is placed so that the reference surface thereof comes into contact with the reference surface of the abutting portion, and an adhesive is applied to both surfaces at predetermined positions on the placed plate member. The holding member having the frame member mounted thereon, and the plate member being the upper side fixed to the lower surface on the upper surface of the frame member, so that the reference surface thereof contacts the reference surface of the abutting portion. Assemble the positioning jig by elastically pressing the reference planes of the pair of holding sections placed on the reference planes of the abutting sections with the pressing mechanism with the elastic force. The positioning jig is heated by a heating mechanism under specified conditions. To melt the adhesive and method of positioning the junction with the heating step of the bonding material is solidified to bond the pair of the plate-like member and the frame member, it is characterized by a cooling