JPH0992155A - Positioning jig of image forming device and positioning method of image forming device by this positioning jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a positioning jig to precisely assemble it in a prescribed position when a spacer is assembled on a face plate or a rear plate of a flat image forming device using an electron source by accompanying a heating process, and a positioning method of the image forming device by this positioning jig. SOLUTION: In an assembling jig 3, plural paper strip-shaped divided plates 4 and 5 having a notch to insert a spacer in a prescribed position on a lengthwise directional end surface, are constituted by combining them in parallel with each other, and a short directional width is set almost in the same with an arranging interval of the corresponding spacer 2, and a notch part becomes a posture hole 4d to hold the spacer 2. The paper strip-shaped divided plates are manufactured by a raw material having a thermal expansion coefficient almost equal to a face plate or a rear plate.

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 a flat image forming apparatus using an electron source, and more particularly to a positioning jig for a thin image forming apparatus having a spacer inside a vacuum container and the positioning jig. The present invention relates to a positioning method for an image forming apparatus.

[0002]

2. Description of the Related Art In recent years, a liquid crystal display device (Liquid Crystal Display) has been used as a light and thin so-called flat display as an image forming device replacing a large and heavy cathode ray tube.
However, the liquid crystal display device still has problems such as a dark image and a narrow viewing angle. As an alternative to the liquid crystal display device, there is a self-luminous flat display that forms an image by irradiating a phosphor with an electron beam emitted from an electron source to generate fluorescence. A self-luminous flat display using an electron source can obtain a brighter image and has a wider viewing angle than a liquid crystal display device. However, in a flat display using an electron source, since an image is formed by irradiating the phosphor with an electron beam, the electron source, the phosphor, and other components are placed in a vacuum container having a vacuum atmosphere of about 10 ⁻⁵ torr or less. The components must be built, and the vacuum container is required to have an atmospheric pressure resistant structure.

As for the vacuum container having the atmospheric pressure resistant structure, a face plate having a phosphor that emits light by the emission of electrons emitted from the electron-emitting device and a rear plate having the electron-emitting device. There is a structure in which a spacer is arranged between the two. Actual opening 5
Japanese Patent Laid-Open No. 8-107554 discloses a cover glass as a vacuum container for a fluorescent display tube, in which a spacer is arranged between a front glass substrate and an anode substrate and these are bonded together using frit glass. FIG. 11 is an exploded perspective view of a fluorescent display tube using the cover glass disclosed in the above publication. In the figure, reference numeral 1101 indicates a front glass substrate, 1102 a spacer, 1110 an anode substrate, and 112.
Reference numeral 0 is a light emitting anode part, 1211 is a control grid, 1122 is a filament wire, 1123 is an exhaust pipe, 1124 is an exhaust pipe hole, 1125 and 1126 are frit glass.
A spacer 1102 is provided between the front glass substrate 1101 and the anode substrate 1110, and the spacers 1102 are attached to the frit glass 11
25, 1126 are used for adhesion, and a cover glass as a vacuum container is formed. The light emitting anode part 1120, the control grid 1121, and the filament wire 1122 which is an electron beam generating source are built in the cover glass. The inside of the cover glass is exhausted under reduced pressure by the exhaust pipe 1123 and the exhaust pipe hole 1124. In the fluorescent display tube of this figure, the light-emitting anode parts 1120 are not arranged in a matrix, but are arranged in only one row, so that it is not intended to display a large screen. Absent.

As a method for obtaining an atmospheric pressure resistant structure, either one of thickening the face plate and rear plate or providing an atmospheric pressure resistant spacer as an auxiliary member inside the image forming apparatus can be considered. . Considering a large-area image forming apparatus, it is desirable to provide an atmospheric pressure resistant spacer inside the image forming apparatus from the viewpoint of reducing the weight of the image forming apparatus. As an example in which a flat plate-shaped atmospheric pressure resistant spacer is provided inside the image forming apparatus, Japanese Patent Laid-Open No. 5-3636 is known.
There is one disclosed in Japanese Patent No. The above-mentioned publication discloses that a fixing jig is required when the plate-shaped atmospheric pressure resistant spacer is assembled to the face plate, and the positional accuracy with the face plate is important in the assembly. However, no specific means for solving these problems is mentioned.

[0005]

When assembling a plurality of spacers on the face plate or the rear plate at a constant interval in the row direction and the column direction at the same time and assembling, the following forms can be considered as the assembling jig. Prepare a flat plate,
A hole for inserting the spacer is formed at a position corresponding to the position where the spacer is set up on the face plate or the rear plate with respect to this flat plate so as to be orthogonal to the main surface of the flat plate to form an assembly jig. When assembling, insert a spacer into the hole of the assembly jig and position the assembly jig and the face plate.

The assembly jig and the method for assembling an image forming apparatus using the assembly jig have the following problems. A case of assembling a spacer on the black stripe of the face plate using the assembling jig will be described.

A plurality of black stripes are formed in parallel with the face plate. However, due to the processing accuracy, the distance between adjacent black stripes has an error with respect to the reference dimension within a certain range.

The spacer is preferably thicker so as to maintain atmospheric pressure resistance. However, if it is thicker than the width of the black stripe, the aperture ratio and the like are partially reduced. Therefore, a thickness narrower than the width of the black stripe is preferable in terms of image quality.

Even if the width of the spacers is made substantially equal to the width of the black stripes and the spacers are correctly positioned at predetermined positions by the assembly jig, the distance between the black stripes has an error with respect to the reference dimension. The spacer may extend beyond the black stripe. The positional displacement of the spacer in the longitudinal direction of the black stripe has no relation to the obstruction of the flow of electrons, and thus strict alignment is not required.

Further, even if the spacer is positioned on the face plate or the rear plate with high accuracy, since the spacers are bonded at a high temperature of 410 ° C. after that, the spacer is affected by the displacement due to thermal expansion, and the positioning is also considered in this respect. There is a need to do.

An object of the present invention is to provide a positioning jig for precisely assembling a spacer at a predetermined position when assembling a spacer on a face plate or rear plate of a flat image forming apparatus using an electron source with a heating process. An object of the present invention is to provide a method of positioning an image forming apparatus using the positioning jig.

[0012]

A positioning jig for an image forming apparatus of the present invention is for precisely joining a spacer to a predetermined position of a face plate or a rear plate of a flat image forming apparatus using an electron source. A positioning jig, which is composed of an assembly jig for holding the spacer at a predetermined position, and an assembly table for aligning the assembly jig with the face plate or rear plate to be joined. Is composed of a combination of a plurality of strip-shaped dividing plates arranged side by side, and a spacer can be inserted into one end face of the strip-shaped dividing plate in the longitudinal direction by a combination with another end face of the adjacent strip-shaped dividing plates in the longitudinal direction. The cutout portion in which the hole is formed is arranged at a predetermined position, and the width of the strip-shaped division plate in the lateral direction is substantially the same as the predetermined spacing of the spacer. Therefore, it is possible to easily assemble the spacers at the intervals that match the predetermined intervals of the spacers by preparing the strip-shaped dividing plates having a plurality of widths in the lateral direction according to the expected variation of the spacer intervals. it can.

The strip-shaped dividing plate may be made of a material having a coefficient of thermal expansion substantially equal to that of the face plate or rear plate to be joined. Even when the assembly involves a heating process, the spacer moves in proportion to the expansion of the face plate or the rear plate, and the positioned position does not change.

Further, a member having a coefficient of thermal expansion higher than that of the strip-shaped dividing plate may be attached to a portion of the cutout portion in contact with the spacer longitudinal surface. When the assembly involves a heating process, the expansion of the assembled member is larger than that of the strip-shaped dividing plate, and the play in the width direction of the spacer and the figure hole is reduced.

The method of positioning the image forming apparatus by the positioning jig of the present invention is the method of positioning the image forming apparatus by the positioning jig described above, in which a spacer is inserted into the hole formed by the notch of the assembly jig. The assembly jig and the face plate or rear plate to be joined are positioned and fixed on the assembly table, and the spacer is joined to the face plate or rear plate to be joined.

In the positioning jig of the present invention configured as described above, the assembly jig including the strip-shaped dividing plate provided with the notch portion having the hole into which the spacer can be inserted is joined by the assembly table. Since it is aligned with the target face plate or rear plate, the spacer can be easily and accurately aligned with the face plate or rear plate to be joined.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention can be widely applied to the assembly of a precision member involving a heating step, in which a plurality of additional members are precisely assembled to a plate member at predetermined positions. A positioning jig and a positioning method for frit-bonding spacers, which will be columns, vertically to a predetermined position on a plate surface of a soda-lime glass will be specifically described.

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view of a positioning jig according to a first embodiment of the present invention, FIG. 2 is a schematic perspective view before assembly of a face plate and a spacer which is a jig assembly target, and FIG. 3 is a jig. 4 is a schematic perspective view after assembling the face plate and the spacer, which is an assembly target of FIG. 4, FIG. 4 is a schematic perspective view of a divided body constituting the assembly jig of the present invention, and FIG. A schematic perspective view of the ingredient,
FIG. 6 is a schematic perspective view after inserting all the spacers into the assembly jig.

In the figure, reference numeral 1 is a face plate to be assembled, 1a is a black stripe marked at a spacer attachment position on the face plate 1, 1b is frit glass as an adhesive, 2 is a spacer attached to the face plate, 3 Is an assembly jig, 4 is a cutout divided body which constitutes the assembly jig 3, 4a is a cutout portion of the cutout divided body 4, 4
b is a long side of the divided body, 4c is a short side of the divided body, 4d is a figure hole for holding the spacer 2, 5 is a cutout-less divided body which constitutes the assembly jig 3, 6 is an assembly table, 6a, 6b, 6c Is a first butting portion, a second butting portion, and a horizontal portion of the assembly table 6, 7 is a spring reaction force receiving block attached to the assembly table 6, and 8 is a face with the spring reaction force receiving block 7 as a fulcrum. The plate 1 and the assembly jig 3 are attached to the first abutting portion 6a,
It is a ceramic spring for closely contacting the second butting portion 6b.

The purpose of this assembling work is, as shown in FIGS. 2 and 3, a black stripe 1a on the face plate 1.
That is, the spacer 2 is correctly vertically attached to the marked position of the black stripe 1a. The width of the black stripe 1a is wider than the thickness t of the spacer 2, and the frit glass 1b of the adhesive is applied within the width t, and the frit glass 1b The spacer 2 is placed at the exact position above and heated at a high temperature of 410 ° C. for joining.

In this case, since the position of the spacer 2 in the Y direction in FIG. 1 needs to be adhered to an accurate position on the black stripe 1a, a high accuracy is required, but a positional deviation in the X direction causes a flow of electrons. Since it has nothing to do with obstruction, it does not need precision.

As shown in FIG. 2, the intervals between the three black stripes 1a are A, A1 and A2 with reference to the end face of the face plate 1. The reference dimensions of A, A1 and A2 are set to 10 mm, respectively, and are processed so that the error is within ± 0.1 mm. Black stripe 1
The width of a is 0.3 mm. The frit glass 1b is previously formed on the black stripe 1a.
The spacer 2 has a thickness t of 0.2 mm and a long side length b of 40.
mm, the height h is 4 mm.

Next, the divided bodies constituting the assembly jig of the present invention will be described with reference to FIGS. 4 and 5. The cutout 4 is formed with a cutout 4a, and the depth t1 of the cutout 4a is 0.01 mm larger than the thickness t of the spacer 2 and 0.21 mm.
It is. The long side length b1 of the notch 4a is 0.1 mm larger than the long side length b of the spacer 2 and is 40.1 mm.
The thickness h1 of the notched divided body 4 is 1 from the height h of the spacer 2.
It is smaller by 3 mm and 3 mm. Then, the notched long side 4b of the notched divided body 4 or the notched divided body 5 which are adjacent to each other.
The cutout portion 4a forms a figure hole 4d for holding the spacer 2. The figure hole is a hole having a cross section similar to the cross section of the spacer 2 and having an appropriate clearance with the spacer 2. The length c of the short side 4c of the split body 4 with cutouts is the distance A, A1, between the black stripes 1a of the face plate 1,
It corresponds to A2. As described above, since A, A1 and A2 are made with an accuracy of 10 mm ± 0.1 mm, the length c of the short side 4c of the notched divided body 4 is +0.
Up to 10.1 mm in increments of 01 mm, −0.
If you prepare up to 9.9 mm for each 01 mm, select by the measured values of A, A1 and A2, and combine with the notch-divided body 5, and the assembly jig 3 at an accuracy of 0.01 mm. Can be configured. As shown in FIG. 5, the spacer 2 can be inserted and held in the figure hole 4d of the assembly jig 3. The split body is made of the same soda-lime glass as the face plate 1 or another material having a coefficient of thermal expansion substantially the same as that of soda-lime glass.

Next, the alignment and joining of the face plate 1 and the spacer 2 will be described with reference to FIG. The positioning jig is composed of an assembling jig 3 and an assembling table 6. A metal (stainless steel) assembling table 6 has a horizontal portion 6c for fixing the face plate 1 and the assembling jig 3 and a vertical portion 6c. The first abutting portion 6 that is upright and has two orthogonal orthogonal first abutting portions 6a, a second abutting portion 6b, the face plate 1 and the assembly jig 3 that serve as a reference surface for positioning.
a, a spring reaction force receiving block 7 serving as a fulcrum for closely contacting the second abutting portion 6b with a heat-resistant ceramic spring 8 is provided.

The assembling jig 3 in which the spacer 2 is inserted and held in the figure hole 4d is placed on the horizontal portion 6c of the assembling table 6, and the end face serving as the reference surface of the assembling jig 3 is placed at the first abutting portion of the assembling table 6. The ceramic spring 8 supported by the spring reaction force receiving block 7 of the assembly table 6 is pressed against the 6a and the second abutting portion 6b. The face plate 1 on which the black stripe 1a is marked and the frit glass 1b is applied at a predetermined position is placed with the black stripe surface facing downward, and the end face serving as the reference surface of the face plate 1 is placed on the first side of the assembly table 6. The frit glass 1b of the face plate 1 is applied to the spacer 2 by pressing the abutting portion 6a and the second abutting portion 6b with the ceramic spring 8 supported by the spring reaction force receiving block 7 of the assembly table 6. It comes into contact with a predetermined position and is positioned and fixed.

The positioning jig in which the face plate 1 and the assembly jig 3 are fixed to the assembly table 6 is put into a firing furnace and heated. Although all members undergo thermal expansion during heating, no matter how the assembly table 6 expands, the face plate 1 and the assembly jig 3 have the first butting part 6a and the second butting part 6
Since the ceramic spring 8 is pressed against b, the reference position does not shift. Since the material of the assembly jig 3 is the same soda lime glass as the face plate 1 or the material whose coefficient of thermal expansion is almost the same as that of the face plate 1, the assembly jig 3 and the face plate 1 are heated even if the temperature rises. Does not cause displacement due to expansion.

By heating up to 410 ° C., the frit glass 1b is melted and the face plate 1 and the spacer 2 are joined by subsequent cooling.

A second embodiment of the present invention is shown in FIGS. 7 and 8. FIG. 7 is a schematic perspective view of a divided body that constitutes the assembly jig of the present invention, and FIG. 8 is a schematic perspective view of the assembly jig configured to match the black stripe. In the figure, 74 is a notched divided body which constitutes the assembly jig 73, and 74a is a notched divided body 7.
4 is a notch, 74d is a hole for holding the spacer 72, 7
Reference numeral 5 is a cutout-less divided body that constitutes the assembly jig 73, and 79 is a stainless plate.

In the first embodiment of the present invention, the depth t1 of the cutout portion 4a of the cutout divided body 4 is set to 0.21 mm, which is 0.01 mm larger than the thickness t of the spacer 2. Therefore, a play of 0.01 mm is generated between the spacer 2 and the thickness of the spacer 2, and the spacer 2 is inclined or the accuracy is deteriorated by 0.01 mm. However, if there is no play of 0.01 mm, it is difficult to insert the spacer 72 into the figure hole 74d. Therefore, the depth t1 of the cutout portion 74a of the cutout 74 is set to 1.21 mm, and the stainless plate 79 having a short side s of 1 mm is inserted into the cutout portion 74a. By doing this, at room temperature, it becomes 0.
Since there is a backlash of 01 mm, the spacer 72 is inserted into the figure hole 74d.
Easy to insert into. When these are heated to 410 ° C., the coefficient of thermal expansion of soda lime glass is 80 × 10 ⁻⁷ and the coefficient of thermal expansion of a stainless steel plate is 200 × 10 ^−7, so (200−80) × 10 ⁻⁷ × 1 mm × (410 ° C. -20
° C) = 0.005 mm and 0.005 mm play is reduced. Rattling was 0.01 mm at room temperature of 20 ° C but 0.01 mm at 410 ° C.
-0.005 mm = 0.005 mm, and the accuracy of joining the spacer 72 to the face plate 1 is further improved.

Next, an image forming apparatus which is a target of the positioning jig and the positioning method of the present invention will be described with reference to the drawings. FIG. 9A is a schematic sectional view showing an example of an image forming apparatus to which the positioning jig and the positioning method of the present invention are applied, and FIG. 9B is an enlarged schematic sectional view of a side wall portion of the image forming apparatus. 10A is a schematic plan view of the surface conduction electron-emitting device, and FIG. 10B is a schematic cross-sectional view of the surface conduction electron-emitting device.

In the figure, 901 is a face plate, 902 is a spacer, 910 is a rear plate, 911 is a support frame, and 9 is a support frame.
Reference numeral 12 is an adhesive member, 913 is an electron-emitting device group such as a surface conduction electron-emitting device, 914 is an image forming member, 915 is a wiring take-out portion, 1010 is a substrate, 1016 and 1017 are element electrodes, 1018 is a conductive thin film, and 1019. Is an electron emitting portion.

The face plate 901 is the image forming member 9
14 is mounted, and the rear plate 910 is mounted with the electron-emitting device group 913. The face plate 901 and the rear plate 910 are airtightly joined together using a support frame 911 to form an airtight container. Face plate 901
A spacer 902 is inserted as an atmospheric pressure supporting member between the rear plate 910 and the rear plate 910, and one end of the spacer 902 is fixed to the rear plate 910 via an adhesive member 912. Further, the spacer 902 can be fixed to the face plate 901 via an adhesive member 912, or both sides can be fixed to the face plate 901 and the rear plate 910 via the adhesive member 912. The image forming member 914 includes a glass plate, a black member called a black stripe, a phosphor, a metal back, and the like.
The wiring portion of the electron-emitting device group 913 passes between the support frame 911 and the rear plate 910, goes out from the inside of the airtight container, and is connected to the drive circuit via the wiring take-out portion 915.

Various electron-emitting devices can be used in the image forming apparatus. Electron Emittin
g Device) is an example of a surface conduction electron-emitting device (Su
rface Conductive Emitter). The surface conduction electron-emitting device utilizes a phenomenon in which electron emission occurs by causing a current to flow substantially parallel to the surface of a thin film having a small area formed on a substrate. The surface conduction electron-emitting device will be described with reference to FIG. The substrate 1010 corresponds to the rear plate 910. In the surface conduction electron-emitting device, a voltage is applied between the device electrodes 1016 and 1017 to cause electricity to flow in the conductive thin film 1018, so that electrons are emitted from the electron-emitting portion 1019.

As the substrate 1010, quartz glass, Na
Glass with a low content of impurities such as glass, soda lime glass, SiO
₂ A glass substrate with a glass surface or a ceramic such as alumina.
A substrate can be used. Element electrodes 1016, 10
As the material of 17, a general conductive material is used. Guidance
The material forming the electroconductive thin film 1018 is Pd, Pt, R
u, Ag, Au, Ti, In, Cu, Cr, Fe, Z
n, Sn, Ta, W, Pb and other metals, PdO, In
₂O_Three, SnO₂ , PbO, Sb₂O_ThreeOxides such as HfB
₂ , ZrB₂ , LaB₆ , CeB₆ , YB_Four , GdB_Four 
Boride such as TiC, HfC, ZrC, TaC, Si
Carbides such as C and WC, nitriding of TiN, HfN, ZrN, etc.
Materials, semiconductors such as Si and Ge, carbon, etc.
You can choose. The electron emitting portion 1019 is formed of the conductive thin film 1018.
This is a high-resistance crack that is formed in part, and is called a so-called energization flux.
It is formed by warming or the like.

As the spacer 902, a thin plate is suitable. The number and arrangement of the spacers 902 are not particularly limited, and can be appropriately designed in consideration of the size of the screen, the pixel arrangement, the structure of the image forming member 914, and the like. The position at which the spacer 902 is provided is also not limited, but as an example, it may be on the black stripe that does not adversely affect the image. As for the material of the spacer 902, those having the same coefficient of thermal expansion as those of the face plate 901, the rear plate 910, and the support frame 911 are preferable, and optimally, materials having the same coefficient of thermal expansion are preferably used. Specifically, it is preferable to use a material having a coefficient of thermal expansion in the range of 0.8 to 1.2. By using materials having the same coefficient of thermal expansion, it is possible to suppress distortion of the closed container itself even after the heating step. Specific materials include insulating materials such as glass, ceramics, and metal coated with an insulating material. Further spacer 90
Although the 2 and the support frame 911 may be configured separately,
For example, it may be processed by etching or the like to form an integrated structure. The face plate 901 for the adhesive member 912
Alternatively, it may be appropriately selected from those capable of adhesively fixing the rear plate 910 and the spacer 902, and frit glass can be given as an example. As the frit glass, those having a softening temperature of 410 ° C. or lower are preferable, and those having a black color are desirable. Regarding the composition of the frit glass, the face plate 901, the rear plate 910,
It is desirable that the composition has a thermal expansion coefficient similar to that of the spacer 902 and the support frame 911.

[0036]

As described above, according to the present invention, in a positioning jig for precisely bonding a spacer to a predetermined position of a face plate or a rear plate of a flat image forming apparatus using an electron source, spacer bonding is performed. For this purpose, a plurality of strip-shaped dividing plates having notches for inserting the spacers at predetermined positions on the longitudinal end faces are used, and strip-shaped dividing plates each having a dimension in which the short-side direction matches the predetermined spacing of the spacers. By arranging the assembly jigs adjacently arranged in parallel, the positioning accuracy of the spacer with respect to the face plate or the rear plate can be improved according to the actually measured size of the black stripes of the face plate or the rear plate. . Further, since the strip-shaped dividing plates are combined, the side surface of the figure hole holding the spacer is opened as a notch, and the figure hole can be easily and accurately machined.

Further, by making the coefficient of thermal expansion of the strip-shaped dividing plate substantially equal to the coefficient of thermal expansion of the face plate or the rear plate, the positioning accuracy at room temperature is maintained even in the heating process for the subsequent joining. Does not cause a gap.

Further, a member having a coefficient of thermal expansion larger than that of the strip-shaped dividing plate is attached to a portion of the cutout portion in contact with the spacer longitudinal surface, so that the clearance for insertion is maintained at room temperature and the spacer is In the heating process for joining to the face plate or rear plate after positioning, the clearance between the spacer and the figure hole is reduced due to the difference in thermal expansion between the assembled member and the dividing plate, and the positioning accuracy is further improved.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a positioning jig according to a first embodiment of this invention.

FIG. 2 is a schematic perspective view of a face plate, which is a jig assembly target, and a spacer before assembly.

FIG. 3 is a schematic perspective view of a face plate, which is a jig assembly target, and a spacer after assembly.

FIG. 4 is a schematic perspective view of a divided body which constitutes the assembly jig of the present invention.

FIG. 5 is a schematic perspective view of an assembly jig configured according to a black stripe.

FIG. 6 is a schematic perspective view after all the spacers have been inserted into the assembly jig.

FIG. 7 is a schematic perspective view of a divided body that constitutes an assembly jig according to a second embodiment of the present invention.

FIG. 8 is a schematic perspective view of an assembly jig configured according to a black stripe.

FIG. 9 is a schematic cross-sectional view showing an example of an image forming apparatus to which a positioning jig and a positioning method of the present invention are applied. FIG. 3A is a schematic cross-sectional view showing an example of an image forming apparatus. FIG. 3B is an enlarged schematic cross-sectional view of the side wall of the image forming apparatus.

FIG. 10 is a schematic view of a surface conduction electron-emitting device. (A) It is a schematic plan view of a surface conduction electron-emitting device. (B) A schematic cross-sectional view of a surface conduction electron-emitting device.

FIG. 11 is an exploded perspective view of a fluorescent display tube using the cover glass disclosed in the publication.

[Explanation of symbols]

 1, 901 Face plate 1a Black stripe 1b, 1125, 1126 Frit glass 2, 72, 902, 1102 Spacer 3, 73 Assembly jig 4, 74 Notched division body 4a, 74a Notched division body 4b Division body Long side 4c Short side of the divided body 4d, 74d Spacer holding spacer hole 5,75 Notched divided body 6 Assembly table 6a First butting portion 6b Second butting portion 6c Horizontal portion 7 Spring reaction force receiving block 8 Ceramic Spring 79 Stainless Steel Plate 910 Rear Plate 911 Support Frame 912 Adhesive Member 913 Electron Emitting Element Group such as Surface Conduction Electron Emitting Element 914 Image Forming Member 915 Wire Extraction Section 1010 Substrate 1016, 1017 Element Electrode 1018 Conductive Thin Film 1019 Electron Emitting Part 1101 Front glass substrate 1110 Anode base 1120 emitting anode 1121 control grid 1122 filament wire 1123 holes exhaust pipe 1124 exhaust pipe

Claims (4)

[Claims] 1. A positioning jig for precisely joining a spacer to a predetermined position of a face plate or a rear plate of a flat image forming apparatus using an electron source, which holds the spacer at a predetermined position. And an assembling table for aligning the face plate or rear plate to be joined with the assembling jig, and the assembling jig is constituted by a combination of a plurality of strip-shaped dividing plates arranged in parallel. A predetermined position is formed on one end face in the longitudinal direction of the strip-shaped division plate in combination with another end face in the longitudinal direction of an adjacent strip-shaped division plate to form a hole into which the spacer can be inserted. The positioning jig of the image forming apparatus, wherein the width of the strip-shaped dividing plate in the lateral direction is substantially the same as the predetermined spacing of the spacers. 2. The positioning jig according to claim 1, wherein the material of the strip-shaped dividing plate is a material having a thermal expansion coefficient substantially equal to that of the face plate or the rear plate to be joined. Positioning jig for image forming equipment. 3. The positioning jig according to claim 1, wherein a member having a coefficient of thermal expansion larger than that of the strip-shaped dividing plate is attached to a portion of the cutout portion in contact with the spacer longitudinal surface. A positioning jig for an image forming apparatus characterized by being provided. 4. A method for positioning an image forming apparatus using the positioning jig according to claim 1, wherein the spacer is provided in a hole formed by the cutout portion of the assembly jig. Is inserted, the assembly jig and the face plate or the rear plate to be joined are positioned and fixed on the assembly table, and the spacer and the face plate or the rear plate to be joined are A method for positioning an image forming apparatus, comprising: