JP2000059925A - Joint for electric continuity between metallic parts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the insulating film removal work for a member before housing assembly work and wire continuity work for a housing member by forming a protrusion at a fitting part, and peeling off the insulating film of a fitting mate with the protrusion for electric continuity. SOLUTION: A protruding part 17 for fitting is formed at one metallic part (protruding side) 23 to be jointed, and a recess 18 for fitting is formed at the other metallic parts (recess side) 24, 25. The protrusion 17 has an insulating film 19 such as coating or plating having insulation properties to prevent the metallic part from being corroded. A protrusion 20 is formed at a fitting part for electric continuity between the metallic parts. The protrusion 20 has a size large enough to form electric continuity between the metallic parts, and the insulating film 19 is peeled off by insertion force for fitting the part for electric continuity. It is thus possible to eliminate the insulating film removal work for a member before assembly work for a housing body such as a distribution panel and work for bringing respective housing members in continuity with an electric wire or the like. It is also possible to carry to coating for each part and facilitate automation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining method for establishing electrical continuity between components in a product having a metal casing, such as a switchboard of a substation facility.

[0002]

2. Description of the Related Art Metal housings such as switchboards of power receiving and transforming facilities are joined by a method of welding parts and establishing electrical continuity at the same time as joining, or by providing an unpainted part to connect metal surfaces. There was a method of contacting. In the case of an assembling type housing, there is a method in which each member is fastened and bolts, washers, etc. are rubbed against the housing at the time of fastening, so that paint, which is an insulating material, is peeled off and electrical conduction between members is expected. . As a known example of such a technique, there is Japanese Utility Model Laid-Open No. 61-153409.

[0003]

In the above prior art,
In the case of the welding frame, the housing itself is large and the structure is complicated, so that automatic painting is difficult, and there is a problem in terms of workability and cost, such as manual painting. In addition, since the housing is heavy, a crane, a lift, or the like must be used when moving, and there is a problem in workability. On the other hand, in the case of the assembly type housing, each member is miniaturized and the painting, transportation and workability are good, but when viewed from the grounding surface, it is expected that the painting will come off due to the rubbing of bolts and washers at the time of fastening There was no certainty. In addition, there is a method of peeling off a part of the joint surface of each member, but in that case, it is necessary to apply a masking to a part of the member at the time of coating, which causes a problem that the number of work steps is increased. .

[0004]

In order to solve this problem, a method is provided in which a projection is provided on one of the members of a housing and a recess is provided on the other, and the projections and depressions are fitted to each other. In this configuration, a projection portion is provided, and the insulating film of the mating partner is peeled off by the projection, so that electrical conduction can be achieved.

[0005]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a configuration in which a load cable is drawn into a high-voltage two-stage switchboard to which the present invention is applied from below.

A circuit breaker room 3 and a conductor room 4 are formed in the switchboard 1 via a partition plate 2 provided in the switchboard 1, and an intermediate plate 5 provided on the circuit breaker room 3 side of the partition plate 2. Circuit breaker room 3
Are divided into an upper circuit breaker room 3a and a lower circuit breaker room 3b, and a disconnecting portion 6 is provided on the partition plate 2 of each circuit breaker room 3, and a terminal of the circuit breaker 7 is provided on the disconnecting portion 6 side of the circuit breaker room 3. Is connected.
The other terminal of the circuit breaker 7 is connected to the bus 10 via another disconnection part.
Connected to. In the partition plate 2 in the lower circuit breaker room 3b,
An inspection cover 13 for inspecting the condition of the bus bar room is provided.
The terminal 11 of the load cable 8 is connected to the disconnection section 6 via the current transformer 9 on the conductor chamber 4 side. The load cable 8 requires an insulating member surrounding portion 12 to insulate the terminal 11 from the outer cover of the load cable and the ground layer. FIG.
In accordance with the standard, the ceiling 16, floor 15, pillar 14
It is necessary to electrically connect all of the above members to the ground bus provided in the panel and to ground them. However, it is difficult to reliably ground the joints painted with an insulating material during assembly. Therefore, a method of peeling off the insulating film at the joint portion during assembling and ensuring the grounding will be described with reference to FIG.

FIG. 3 shows the basic configuration of the present invention. A fitting projection 17 is provided on one of the metal components to be joined, and a fitting recess 18 is provided on the other metal component. Convex part 17
Is a paint with insulating properties to prevent corrosion of metal parts,
It has an insulating film 19 such as plating. In order to establish electrical continuity between the components, a projection 20 is provided at the fitting portion. Protrusion 2
Reference numeral 0 denotes a portion where the insulating film 19 can be peeled off, and the insulating film 19 is peeled off by an insertion force for fitting a component, and electrical conduction is obtained. The bolt hole 21 is a hole for bolt penetration for joining and fixing components.

Hereinafter, the bonding method of the present invention will be described with reference to FIGS.

FIGS. 4 and 5 show examples of electrical connection using two or more metal parts. FIG. 4 shows a metal part (concave side 1) 24 and a metal part (concave side 2) 25 provided with concave portions 18 each having a projection 20 and a metal part having two convex portions 1 for connecting them. By fitting the components (convex side) 23, two or more components are electrically connected at the same time. FIG. 5 shows an example in which this method is applied to a switchboard. The floor portion 14 having the concave portion 18 having the projection 20 and the column portion 1 having the concave portion 18 similarly having the projection 20
The metal part (convex side) 23 is electrically connected to the floor part 14 and the pillar part 15 by fitting a metal part (convex side) 23 having the convex part 17 to the metal part 5. The floor portion 14 and the pillar portion 15 are fixed to the floor portion 14 and the pillar portion 15 with bolts or the like using the holes 21, thereby also serving as reinforcement when the housing is formed.

FIG. 6 shows an example in which the recess 18 is composed of two or more metal parts. The concave part 18 is formed by combining the metallic part (concave side 1) 24 and the metallic part (concave side 2) 25 having the projection 20 as shown in FIG. 6, and the metallic part (convex side) 23 is fitted. Electrical conduction can be obtained by combining them.

FIGS. 7, 8 and 9 show bolt holes 21 which are fixed with bolts or the like in order to strengthen the joint between metal parts.
An example is shown in which a convex portion 17 is provided on a surface different from the surface of a metal component having the following. FIG. 7 shows a case where a convex part 17 is formed by bending a part of a metal part at a right angle. However, in general, the bending process has a lower processing accuracy than the boring process. The portion 17 is pressed in one direction with the protrusion of the concave portion provided with the protrusion. This makes it possible to stably maintain the electrical conduction state. FIG.
Is obtained by bending a surface having a convex portion 17 formed by processing a part of a metal part and a surface having a bolt hole 21 respectively. The convex portion 17 is tightened with a bolt or the like using the bolt hole 21. Is pressed in one direction with the protrusion of the concave portion provided with the protrusion. FIG. 9 shows a bent portion of a surface having a convex portion 17 formed by processing a part of a metal part. The convex portion 17 is provided with a protrusion by tightening a bolt or the like using a bolt hole 21. Is pressed in one direction with the protrusion.

FIG. 10 shows an example in which a guide portion 22 for determining a position when the convex portion 17 is fitted into the concave portion 18 is provided. The workability of fitting and the strength of the fitting portion can be improved by this guide portion.

FIG. 11 shows an example of a perforation in which the recess 18 has the projection 20. The projection 20 is formed by piercing the
The protrusions 20 are formed by plastically deforming the end faces of the base material by plastic working using a press or the like.
By making the concave portion 18 a perforation, the convex portion is surely penetrated,
A stable electrical conduction state can be obtained.

FIGS. 12, 13 and 14 show examples in which the projections 20 are provided with projections 20. FIG. FIG. 12 and FIG.
An example is shown in which a projection 20 is provided by plastically deforming a part of the. The projection 20 can be easily formed by plastic working using a press or the like. FIG. 14 shows an example in which the projection 20 is provided at the fitting portion when the projection 17 is formed.

FIG. 15 shows an example in which the material thickness of the projection 17 is set to the dimension 26 of the projection fitting portion. By using the stable dimension of the material as the material thickness of the convex portion 17 as the convex fitting portion size 26, the processing of the convex portion 17 in the thickness direction becomes unnecessary, and the low cost processing of the convex portion 17 is possible. Becomes The concave fitting portion dimension 27 formed by the plurality of protrusions 20 provided in the concave portion 18 is smaller than the convex fitting portion dimension 26 by the amount of peeling off the insulating film of the convex portion 17.

FIGS. 16 and 17 show an example in which a slight warp is applied to the fitting portion of the convex portion 17 and the convex portion 17 and the projection 20 are stably joined by using a force for returning the warp. Show. FIG. 16 shows that a plurality of projections 20 provided in the concave portion 18 slightly warp the fitting portion of the convex portion 17. FIG. 17 shows the guide portion 22 and the protrusion 20 provided in the recess 18.
In this way, the projection 17 is slightly warped in the fitted state.

FIG. 18 shows an example in which the projections 20 are formed by combining the simple shapes of the concave portions 18 formed by the perforations as shown in FIG. The simple shape refers to a standard punching die such as a square, a circle, and a hexagon. By drilling a combination of these multiple punches, there is no need to make a special punching die for drilling, making it easy and inexpensive. Becomes possible.

[0019]

As described above, according to the present invention, it is not necessary to remove the insulating film of a member before assembling a casing such as a switchboard or to conduct each member of the casing with an electric wire or the like. It is possible to In addition, in an assembly type housing, painting can be performed for each component, and automation can be facilitated. Also,
The projection can be assembled with a fitting force for peeling off the insulating film, and electrical conduction can be secured at the same time as the assembling. Therefore, there is an effect that the housing can be efficiently assembled.

[Brief description of the drawings]

FIG. 1 shows a configuration diagram when a load cable is drawn into a high-voltage two-stage switchboard from below.

FIG. 2 shows an assembled state diagram of a housing of a switchboard.

FIG. 3 shows a basic configuration diagram of the present invention.

FIG. 4 shows two recesses in two or more metal parts provided with recesses.
By fitting the convex parts of the metal parts provided with two or more convex parts,
FIG. 2 shows a configuration diagram in which two or more components are electrically connected at the same time.

FIG. 5 is a diagram showing a configuration in which the method shown in FIG. 4 is applied to a floor portion and a pillar portion of a switchboard, a protrusion provided on a reinforcing plate is fitted, and two or more components are electrically connected at the same time. Show.

FIG. 6 shows a configuration diagram in a case where a component forming a concave portion is composed of two or more components.

FIG. 7 is a configuration diagram in which a convex portion is formed by bending a part of a metal component, and the convex portion is provided on a surface different from a surface fixed with bolts or the like.

FIG. 8 is a diagram illustrating a surface having a convex portion formed by processing a part of a metal component and a surface having a bolt hole, each of which is bent to form a convex portion on a surface different from a surface fixed with bolts or the like; FIG.

FIG. 9 is a configuration diagram in which a surface having a convex portion formed by processing a part of a metal component is bent, and the convex portion is provided on a surface different from a surface to be fixed with a bolt or the like.

FIG. 10 shows a configuration diagram provided with a guide portion for determining a position when a convex portion is fitted to a concave portion.

FIG. 11 shows a configuration diagram in which a concave portion is provided by perforation, and a projection is formed by applying an impact or the like to an end surface of the concave portion.

FIG. 12 shows a configuration diagram in which a projection is provided by applying a blow or the like to an end face of a projection.

FIG. 13 is a diagram showing a configuration in which a projection is provided at a fitting portion of a projection by press working or the like.

FIG. 14 is a diagram showing a configuration in which a projection is provided at the time of forming a projection.

FIG. 15 is a configuration diagram in which a material plate thickness of a convex portion is set to a size of a fitting portion of the convex portion.

FIG. 16 is a configuration diagram in which the tips of a plurality of protrusions of a concave portion are arranged so as to slightly warp the convex portion when fitted to the convex portion.

FIG. 17 is a configuration diagram showing a configuration in which a convex portion is slightly warped when the convex portion is fitted in the guide portion and the projection of the concave portion.

FIG. 18 shows a configuration diagram in which a projection of a concave portion is formed by combining simple shapes.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Distribution board, 2 ... Partition board, 3 ... Circuit breaker room, 3a ... Upper circuit breaker room, 3b ... Lower circuit breaker room, 4 ... Conductor room, 4a ... Upper conductor room, 4b ... Lower conductor room, 5 ... Intermediate plate, 6: disconnecting part, 7: breaker, 8: load cable, 9: current transformer, 10
... busbar, 11 ... terminal of load cable 8, 12 ... insulating member surrounding part, 13 ... busbar room inspection cover, 14 ... pillar part, 15 ...
Floor section, 16 ceiling section, 17 projection section, 18 recess section, 19 section
Insulating film, 20 ... projection, 21 ... bolt hole, 22 ... guide part,
23: metal part (convex side), 24: metal part (concave side 1), 25: metal part (concave side 2), 26: convex part fitting dimension, 27: concave part fitting dimension.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yoshio Koguchi 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture Inside the Kokubu Plant, Hitachi, Ltd. (72) Inventor Nobuyuki Shiina 1-1-1 Kokubuncho, Hitachi City, Ibaraki Prefecture No. 1 Inside Hitachi Kokubu Plant (72) Inventor Mikio Ono 1-1 1-1 Kokubuncho, Hitachi City, Hitachi City, Ibaraki Prefecture EA05

Claims (12)

[Claims] 1. A method for electrically connecting two or more metal parts, wherein one of the parts is provided with a convex part and the other part is provided with a concave part, and the concave and convex parts are fitted and joined.
A joining method, wherein a projection is provided on a fitting portion, an insulating film of a mating partner is peeled off by the projection, and the electrical connection is established for grounding. 2. The joining method according to claim 1, wherein the projections of the component having two or more projections are fitted into the depressions of the two or more components having the depressions, and two or more projections are simultaneously formed. A joining method characterized by electrically connecting parts. 3. The joining method according to claim 1, wherein the component forming the recess comprises two or more components. 4. The joining method according to claim 1, wherein the projections are arranged on a plane different from a surface to be fixed with bolts or the like. 5. The joining method according to claim 1, further comprising a guide portion for determining a position at which the convex portion is fitted to the fitting portion of the concave portion. 6. The joining method according to claim 1, wherein the recess is a perforation having a projection. 7. The joining method according to claim 1, wherein the projection is provided by plastically deforming the fitting portion of the projection. 8. The joining method according to claim 1, wherein the dimension of the material of the metal part is the dimension of the fitting portion of the projection to which the projection of the recess fits. 9. The joining method according to claim 1, wherein the tips of the plurality of projections of the recess are arranged so as to slightly warp the projection in the fitted state. 10. The joining method according to claim 5, wherein
A joining method characterized in that a slight warp is given to the convex portion in the fitted state by the guide portion and the projecting portion. 11. The joining method according to claim 6, wherein
A joining method characterized in that a projection is formed by combining simple shapes. 12. A circuit breaker room and a conductor chamber are formed in a distribution box via a partition plate provided in a switchboard assembled without welding members of a housing, and provided on the circuit breaker room side of the partition plate. A switchboard that divides the circuit breaker room into an upper circuit breaker room and a lower circuit breaker room via an intermediate plate, provides a disconnection part on the work board of each circuit breaker room, and connects a load cable to one side of the conductor room side Are arranged in the width direction,
Further, in a switchboard connected to a ground wire provided outside the switchboard from a point passing through the bus for grounding in the width direction,
A switchboard using the joining method according to claim 1.