JP2559805B2 - How to assemble the intermediate part of the plug-in plug - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for assembling an intermediate member used in manufacturing a plug-in plug such as a so-called U cap.

2. Description of the Related Art Japanese Patent Laid-Open No. 61-128481 discloses this type of plug. In this conventional example, the block to be included in the body by simultaneous molding is composed of members as shown in FIG.

That is, the side surface of the plug blade 1 is fitted in the side surface recess 2a of the rotating body 2, and is rotatably supported by the pin 4 at the front end of the terminal fitting 3. The terminal fitting 3 is sandwiched between lower and upper supports 5a and 5b, which are substantially U-shaped and constitute an edge of the opening of the body. The rotating body 2 is rotatably disposed in a notch opening formed at the tip of the upper and lower supports 5a and 5b together with the blade 1 pivotally supported by the terminal fitting 3.

A power cord 6 is fixed to the rear end of the terminal fitting 3 by caulking and is electrically and mechanically connected.

A block formed by such a member is formed into a body by simultaneous molding with a synthetic resin such as a thermoplastic resin so as to include the connection portion of the power cord 6 and the upper and lower supports 5a and 5b, and a desired insertion is made. You get a plug.

[Problems to be Solved by the Invention] By the way, in the assembly process of the block, in the case where the rotating blade 2 is sandwiched between the blades 1 pivotally supporting the terminal fittings 3 to connect the blades 1 and 2 to each other, the conventional method is used. Then, as shown in FIG. 7, the blade 1 is pivotally supported on the terminal fitting 3 in the punched state, and the members in this state are formed in the recesses 2a formed on both side surfaces of the rotating body 2 in the rear side surface of the blade 1. Was fitted and joined.

However, there is a problem that each member tends to come apart, and thus automation is difficult to achieve.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a method of assembling an intermediate member of an insertion plug that can be automated in the assembling work of a rotating body.

[Means for Solving the Problems] The present invention has a pair of blades, a rotating body in which the rear side surfaces of the blades are connected to both side surfaces, and a front side surface rotatably supported on the outer side surface of the blades. The terminal fittings, the cords connected to the respective terminal fittings, and the turning body are rotatably arranged inside the U-shaped notch opening formed in the front portion, and the cord connecting portion and the upper and lower support bodies are included. In the insertion plug composed of the body formed by simultaneous molding as described above, the opening edge of the recess provided for connecting the rear side surface of the blade to both side surfaces of the rotating body has an inclined surface inclined inward and A press-fitting protrusion that presses against the edge of the blade is formed in advance, and the left and right terminal fittings corresponding to both sides of the rotating body are formed by punching with the base connected to the metal hoop base material. In addition, the metal with the blade being rotatably supported on the tip of the terminal fitting. Prepare the hoop in advance, move the metal hoop and turn the side face in the same direction as the face of the metal hoop, and connect the left and right terminal fittings and the blades to the metal hoop base material. When the part of each connection terminal located at the rear end of the shaft support part moves to a predetermined position, the punch is moved toward the part and the left and right parts are moved by the punch and the die facing the part. While bending the connecting metal fitting so that the side surface is perpendicular to the surface of the metal hoop and the pillar blade is inside the terminal metal fitting, move the rotating body between the left and right blades at the same time to both sides of the rotating body. The rear side surface of the blade is press-fitted into the recess provided in the surface to connect the rotating body and the blade.

[Operation] Then, the opening edge of the recess provided for connecting the rear side surface of the blade to both side surfaces of the rotating body has an inclined surface inwardly inclined, and for press-fitting to press the edge of the blade. In addition to pre-forming the protrusions, the left and right terminal fittings corresponding to both sides of the rotating body are formed by punching with the base part connected to the metal hoop base material, and a blade is attached to the tip of the terminal fitting. A metal hoop rotatably supported is prepared in advance.

Then, in the assembly process, the metal hoop is moved so that the left and right terminal fittings and the blades are connected to the metal hoop base material with the side faces in the same direction as the surface of the metal hoop. When the part of each connection terminal located at the rear end of the shaft support part of the is moved to a predetermined position, the punch is moved toward the part and left and right by the die and the die opposed through the part. While bending the connecting metal fitting for use so that the side surface is perpendicular to the surface of the metal hoop and the blade is inside the terminal metal, at the same time move the rotating body between the left and right blades to move the rotating body. The rear side surface of the blade is press-fitted into the recesses provided on both side surfaces to connect the rotating body and the blade. In this way, in the state of the metal hoop described above, the left and right blades are inserted into the recesses on both sides of the rotating body in the process of bending without disconnecting the terminal fittings that pivotally support the blade from the metal hoop. Can be combined.

[Examples] The present invention will be described below with reference to Examples.

Embodiment FIG. 1 is a perspective view of an insertion plug according to the present embodiment. The body 10 is formed by simultaneous molding with a thermoplastic resin such as vinyl chloride, and is formed at the front end of the body 10. The body 10 is left with a portion that becomes the edge of the notch opening 11
The support body 5a, 5b is embedded in the inside, and the power cord 6 connected to the terminal fitting 3 which can be sandwiched by the support body 5a, 5b is connected to the body.
It is derived from the rear of 10.

In the notch opening 11, a rotary body 2 made of a synthetic resin such as a thermoplastic resin having the rear end side surfaces of the blade 1 fitted on both side surfaces is pivotally supported in a vertically rotatable manner.

FIG. 2 is an exploded perspective view of members other than the body 10. The support members 5a and 5b are formed in a U shape so that they are vertically overlapped with each other so as to be coupled to each other, and the upper support member 5a is provided in a locking hole 12 that is vertically penetrated through both side pieces of the lower support member 5b. The engaging projections 13 projecting from the lower portions of the both side pieces are inserted and locked to be coupled. The notch openings at the front ends of the supports 5a and 5b form the notch openings 11 of the body 10.

In the terminal fitting 3, the wide-diameter portion 18a of the shaft 18 projecting from the rear end outer surface of the blade 1 is rotatably fitted into the hole 17 formed in the front portion, and the shaft 18 protruding toward the outer surface of the tip portion is provided. The small-diameter portion 18b and the spring washer 19 are caulked, and the blade 1 is rotatably arranged. An intermediate portion 3a formed by being bent in an L-shape is continuously provided at the rear end of the tip portion, and a flat portion extending by bending inward is provided at the upper end of the intermediate portion 3a so as to be orthogonal to the side surface. Piece 3b
A press-fitting projecting piece 15a is provided so as to project downward from the side end thereof, and another press-fitting projecting piece 15b is provided so as to be parallel to the press-fitting projecting piece 15a and downward from the lower end of the intermediate portion 3a. .
These press-fitting projecting pieces 15a, 15b are formed with arrowheads at their tips, and as shown in FIGS. 3 (a) and 3 (b), the lower support 5b.
The center metal piece is press-fitted into press-fitting grooves 16a and 16b provided on both sides of the upper surface of the central piece to fix the terminal fitting 3 to the lower support 5b.

Further, at the rear end of the flat piece 3b, a caulking connection portion 3c is provided to caulk the power cord 6 and mechanically and electrically connect.

The blade 1 has a rear portion fitted into a recess 20 on the side surface of the rotating body 2 and a notch 21 formed at the upper and lower ends thereof is provided in the recess 20.
22 is fitted.

When assembling, however, first, as shown in FIG. 4 (a), the metal hoops A are used to punch each terminal metal fitting 3. At this time, the pair of left and right terminal metal fittings 3 are line-symmetrically punched. However, the part of the caulking connection part 3c is not cut off from the base material a of the metal hoop A, and the flat piece 3c is also bent so that it is not bent perpendicularly to the intermediate part 3b. With the side surface of the metal fitting 3 in the same direction as the surface of the metal hoop A, the blade 1 is rotatably supported by the spring washer 19 at the tip of each terminal fitting 3.

In this way, without disconnecting the terminal fitting 3, the metal hoop A pivotally supporting the blade 1 on the terminal fitting 3 is moved in the direction X shown in the assembling process so that the pair of left and right terminal fittings 3 are at predetermined positions. After moving, punch B from above,
B is lowered, and the boundary D between the flat piece 3c and the intermediate portion 3a is bent perpendicularly to the flat piece 3c with the punches B and B and the corresponding dies C and C so that the blade 1 is located inside. Simultaneously with this bending process, the rotary body 2 is moved between the left and right blades 1 as shown by an arrow Y, and the rear portion of the blade 1 is press-fitted into the recesses 20 formed on both side surfaces of the rotary body 2. As shown in FIG. 5, the recess 20 has an inwardly sloping surface 20a formed at the opening edge and a press-fitting projection 20b having a triangular cross-section which presses against the edge of the blade 1. The inclined surface 20a guides the rear side surface of the blade 1 in accordance with the bending of the terminal fitting 3, and the press-fitting projection 20b is pressed against the side edge of the blade 1 to rotate the rotating body 2 and the blade. Combine 1 and.

After this connection, the connecting piece b is separated from the metal hoop base material a, and the terminal fittings 3, 3, the blades 1, 1 and the block of the rotating body 2 are formed as shown in FIG. 4 (c).

After the block as the intermediate member is assembled, the next assembly step is performed, and the block is fitted into the support 5b.

At this time, the press-fitting protrusions 15a and 15b of the terminal fitting 3 are attached to the lower support 5
The terminal fitting 3 is fixed to the lower support 5b by being press-fitted into the press-fitting grooves 16a and 16b provided on both sides of the upper surface of the center piece b. At this time, the flat piece 3b is placed on the rib 25 projecting between the press-fitting grooves 16a, 16b, and the middle portion 3a bent further in an L shape has the lower half in the positioning groove 14 formed on the side piece of the support b. The terminal fitting 3 is positioned by fitting it, and is further connected to the positioning groove 14, and the plug blade 1 and the pivotal support portion of the terminal fitting 3 are housed in the recess 23 formed on the inner side surface of the cutout opening 11. The rotary body 2 is rotatably arranged together with the blade 1 in the notch opening 11. Further, the caulking connection portion 3c of the connection fitting 3 is fitted into a notch groove 24 formed at the rear end of the support body 3b and led out to the outside.

FIG. 4 (d) shows a state in which the block is fitted in the support 5b, and the support 5b in which the block is fitted is shown.
Is moved on the pallet of an automatic machine to the next stage. In this moving process, the block on the support 5b is pressed into the press fitting projections 15a, 15b of the fitting 3 and the press fitting grooves 16a, 1a.
Since it is fixed by press-fitting connection with 6b, rattling of each member of the block does not occur, so in the next step the support 3a
Trouble does not occur at the time of adhering and bonding the support to the support 3b.

The support 3a has a concave portion symmetrical to the concave portion 23 on the inner side surface of the side piece.
23 'is formed, and a positioning groove (not shown) symmetrical to the positioning groove 14 is formed on the lower surface of the side piece.
A recess (not shown) into which 25 parts are fitted is provided, and a symmetrical notch groove (not shown) is further formed in the notch groove 22, and the support member 3a is attached to the support member 3b. When recessed 2
The upper half of the middle part 3a, the flat piece 3b, and the upper part of the caulking connection part 3c of the terminal metal part 3 are accommodated in 3 'by storing the plug blade 1 and the upper half of the terminal metal part 3 in the positioning groove, the concave part, and the notch groove. Each of them is fitted, and the terminal fitting 3 is sandwiched between the support 3b. Supports 3a, 3
For the connection with b, the locking projection 13 of the support 3a is connected to the locking hole 1 of the support 3b.
It is performed by inserting and locking into 2.

FIG. 4 (e) shows a state in which the support body 3a is joined to the support body 3b. In the joining step, the wire of the power cord 6 is caulked and the caulked connection portion of the terminal fitting 3 is led to the outside.
3c and mechanically and electrically connect.

The block of the intermediate member thus completed is transferred to an automatic manufacturing apparatus for plugs with a cord and the body 10 is formed by simultaneous molding.

In this molding, the body 10 is the support 5 of the intermediate member.
The plugs shown in FIG. 1 are completed by including a and 5b and the connecting portion between the caulking connection portion 3c of the terminal fitting 3 and the power cord 6.

In order to strengthen the connection between the body 10 and the supports 5a, 5b, the supports 5a, 5b are provided with through holes 27a, 27b, 27c, respectively, so that the molding resin can flow around. Further, ribs 26 projecting from the supporting bodies 5a and 5b so as to surround the notch opening constitute the edge portion of the notch opening 11 of the insertion plug.

EFFECTS OF THE INVENTION The present invention has an opening edge of a recess provided to connect the rear side surfaces of the blade to both side surfaces of the rotating body as described above, and an inclined surface inwardly inclined and the blade edge. A press-fitting projection that presses against the edge is formed in advance, and left and right terminal metal fittings corresponding to both side surfaces of the rotating body are formed by punching with the base connected to the metal hoop base material and the terminal metal fitting is formed. Prepare a metal hoop in which the blade is rotatably rotatably supported at the tip of the metal hoop, move the metal hoop, and connect the metal hoop to the metal hoop base material with the side face in the same direction as the metal hoop face. When the part of each connection terminal located at the rear end from the pivotal support part of the left and right terminal fittings and each blade in the opened state is moved to a predetermined position, the punch is moved toward the part and The left and right connecting fittings are connected by the punch and the die facing each other through the part. The side surface is perpendicular to the surface of the metal hoop, and the rotary blade is moved between the left and right blades at the same time while bending so that the blade is inside the terminal fitting. Since the rear side of the blade is press-fitted into the recess to connect the rotating body to the blade, the metal hoop can be bent without disconnecting the terminal fitting that pivotally supports the blade from the metal hoop. Left in the recesses on both sides of the rotating body in the process,
It is possible to connect the right blade, and therefore, when assembling the intermediate member by connecting the rotating body, the blade and the terminal fitting, there is no variation in the members, and there is an effect that automation can be achieved.

[Brief description of drawings]

1 is a perspective view of an embodiment of the present invention, FIG. 2 is an exploded perspective view other than the body of the same as above, and FIGS. 3 (a) and 3 (b) are partially cutaway front views of the lower support of the same. Drawing, a top view, Drawing 4 is an assembly explanatory view of an intermediate member same as the above, Drawing 5 is a side view of a rotating body used for the same as above, Drawing 6 is a disassembled perspective view of members other than a body of a conventional example, Drawing 7 [Fig. 3] is an assembly explanatory view of the above intermediate member. 1 is a plug blade, 2 is a rotating body, 3 is a terminal fitting, 5a and 5b are supports, 6 is a power cord, 10 is a body, 11 is a cutout opening,
Reference numeral 20 is a recess, 20a is an inclined surface, 20b is a press-fitting protrusion, A is a metal hoop, a is a metal hoop base material, B is a punch, and C is a die.

Claims (1)

(57) [Claims] 1. A pair of blades, a rotating body in which both side surfaces are joined to the rear side surfaces of the blades, a terminal fitting in which an outer side surface of the blades is rotatably supported at a front side surface, and a terminal. A plug that consists of a cord that is connected to a metal fitting and a body that is formed at the same time by arranging a rotating body rotatably inside a U-shaped notch opening formed at the tip and enclosing the connecting part of the cord by simultaneous molding. At the opening edge of the recess provided for connecting the rear side surface of the blade to both side surfaces of the rotating body, an inclined surface inclined inward and a press-fitting projection for press-contacting the edge of the blade are formed in advance. In addition to forming, the left and right terminal fittings corresponding to both sides of the rotating body are formed by punching with the base part connected to the metal hoop base material, and the blade can be freely rotated at the tip of the terminal fitting. Prepare a metal hoop that is axially supported in advance and move the metal hoop. Each connection terminal located at the rear end from the pivotal support part of the left and right terminal metal fittings and each blade in a state where the side surface is oriented in the same direction as the metal hoop surface and connected to the metal hoop base material. When the part moves to a predetermined position, the punch is moved toward the part, and the punch and the die facing each other through the part connect the left and right connecting fittings to the side of the metal hoop. And the vertical direction and the blade is bent so that the blade is inside the terminal fitting, and at the same time, the rotary body is moved between the left and right blades, and the rear side surface of the blade is formed in the recesses provided on both sides of the rotary body. A method for assembling an intermediate member of an insertion plug, characterized in that the rotating body and the blade are joined by press-fitting.