JP3278366B2 - Method of manufacturing resin assembly and method of manufacturing double locking connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a resin assembly which can eliminate the need for assembling resin-molded products to be pin-joined, shorten the molding process and reduce production costs. The present invention relates to a method for manufacturing a double locking connector.

[0002]

2. Description of the Related Art Conventionally, in a connector made of resin used for connection of electric wiring, a connection terminal inserted into the housing is prevented in order to prevent the connection terminal inserted into the resin housing from falling off. It is common practice to integrally form an elastic locking piece (lance) that engages with the lance. However, for connectors used for vehicle electrical wiring,
A double engagement member added with a double engagement member that locks the engagement state of the elastic engagement piece so that the engagement by the elastic engagement piece does not come off due to the vibration or the like during traveling. Stop connectors are widespread.

FIGS. 7 to 10 show an example of a conventional double locking connector. This double locking connector 1
Is disclosed in JP-A-5-226025,
A substantially box-shaped housing main body 5 having an elastic locking piece (lance) 4 for locking the connection terminal 3 inserted into the terminal receiving hole 2 facing the terminal receiving hole 2, and engagement by the elastic locking piece 4. A structure comprising a double locking member 7 for locking the state, and a hinge band 8 connecting the double locking member 7 to the housing body 5 so as to be able to shift to the locked state, is made of synthetic resin. It is a molded product. The hinge band 8 is a thin, flexible band.

[0004] The housing body 5 is provided with an opening 5a in a corresponding outer wall portion so that the locking portion 7a at the tip of the double locking member 7 can protrude into the terminal accommodating hole 2.
As shown in FIG. 9, the double locking connector 1 is configured such that the locking portion 7 a of the double locking member 7 is connected to the opening 5 a of the housing body 5.
The connection terminals 3 are mounted in the terminal receiving holes 2 in a state where the connection terminals 3 are temporarily fixed. Next, as shown in FIG. 10, the connection terminal 3 into which the elastic locking piece 4 provided for each terminal accommodation hole 2 is inserted.
Then, the double locking member 7 is further pushed into the housing main body 5 to completely fix the double locking member 7 to the housing main body 5. In the fully fixed state, the locking portion 7 a of the double locking member 7 presses the floating of the connection terminal 3 to lock the locking state by the elastic locking piece 4.

In the double locking connector 1, the double locking member 7 can be integrally formed with the housing main body 5 by coupling with the flexible hinge band 8.
Further, it is also possible to freely shift to the temporary fixing state shown in FIG. 9 or the permanent fixing state shown in FIG. However, the hinge band 8
Since the flexibility is high, the force for regulating the moving direction of the double locking member 7 is weak, and the double locking member 7 is shifted to the temporarily fixed state in FIG. 9 or the fully fixed state in FIG. In this case, there is a problem that the operator has to adjust the moving operation force of the double locking member 7 with his / her fingers, and the assembling workability is poor. Further, when shifting the double locking member 7 to the temporary fixing state of FIG. 9 or the full fixing state of FIG. 10, the double locking member 7 is moved so as to move in a predetermined direction and a predetermined position of the double locking member 7. Since the operating force must be adjusted, there is a problem that it is difficult to automate the assembly.

From such a viewpoint, recently, a double locking connector 10 shown in FIGS. 11 to 13 has been proposed. The double locking connector 10 is disclosed in Japanese Unexamined Patent Publication No. 7-3122.
No. 55, a resin housing body 11 having a terminal receiving hole 2 is provided with a pair of opposed left and right outer wall surfaces 1.
1a is provided with an engaging pin 11b protruding in a direction opposite to the outer wall surface 11a. As shown in FIG. 12, a double locking member 12 made of resin for double locking the connection terminal 3 in the terminal receiving hole 2 has a fitting hole 12a into which the engaging pin 11b is fitted. And the engaging pin 11b and the fitting hole 1
2a so as to be rotatably connected to the housing body 11.

As described above, when the housing main body 11 and the double locking member 12 are connected by the pin connection, the housing main body 11 when the double locking member 12 is temporarily or permanently fixed to the housing main body 11 is fixed. The moving direction (trajectory) of the double locking member 12 can be regulated to be constant, so that the operation force when moving the double locking member 12 does not need to be complicated. Therefore, the engagement pin 1
If the connection between the housing main body 11 and the double locking member 12 by 1b is completed, the subsequent operation during assembly is extremely easy, and the burden on the operator can be reduced, and the assembly can be automated. It becomes possible.

[0008]

However, in the double locking connector 10 described above, when the engaging pin 11b of the housing body 11 is fitted into the fitting hole 12a of the double locking member 12, It is necessary to perform an operation of forcibly expanding the outer wall portion 12b near the fitting hole 12a.
Thus, there is a problem that the assembly itself of the double locking member 12 takes time and effort. In addition, since the outer wall 12b of the double locking member 12 must be forcibly elastically deformed to fit the engaging pin 11b into the fitting hole 12a on the outer wall 12b, the protrusion of the engaging pin 11b Since the length cannot be increased and the engagement between the engagement pin 11b and the engagement hole 12a becomes shallow, the engagement is easily released when the outer wall 12b is warped outward due to distortion after molding. Therefore, there is a problem that it is difficult to increase the connection strength between the housing body 11 and the double locking member 12.

Accordingly, an object of the present invention is to solve the above-mentioned problems, and a method of manufacturing a resin assembly or a double locking connector having a configuration in which resin molded products are pin-connected to each other, Each molded product can be integrally molded in an assembled state connected by pin connection, eliminating the need for assembling work between resin molded products that are pin-connected, and shortening the molding process and reducing production costs. To provide a method of manufacturing a resin assembly and a method of manufacturing a double locking connector.

[0010]

SUMMARY OF THE INVENTION The object of the present invention is to provide a first molded product in which opposing wall surfaces are provided with engaging pins protruding in the opposite direction of the wall surfaces, and wherein the engaging pins are fitted. A second molded product that is fitted to the opposite wall portion and that is fitted to the first molded product so as to be rotatable or slidable by fitting the engagement pin and the fitting hole. A method for manufacturing a resin assembly, comprising:
A resin material used for molding each of the molded products is selected such that the shrinkage of the molded product is greater than that of the second molded product, and the tip surface and the inner surface of the second molded product are molded. Was
And a rear end surface and an inner surface of the second molded product.
A rear end side mold for molding the first molded product;
Outer surface metal for forming the outer surface of the wall portion and the fitting hole
The mold and
Inject the resin with the desired shrinkage to the second molded product
After molding, the rear end side mold is used for molding the first molded article.
In the side mold for housing, the mold for the outer surface is
After replacing the mold for the outer surface for molding 1
Desired shrinkage in the cavity defined by the mold
Molding the first molded article by injecting resin at a predetermined rate
Thus, the problem can be solved by a method of manufacturing a resin assembly , wherein the first molded article and the second molded article are integrally molded in an assembled state.

The above object is also achieved by providing a terminal locking means for locking the connection terminal facing the terminal receiving hole into which the connection terminal is inserted, and providing the terminal on the opposing outer wall in the direction in which the outer wall faces. A housing body made of resin having a configuration in which a protruding engagement pin is provided, and a fitting hole in which the engagement pin is fitted is provided in an opposing wall, and the engagement pin is fitted to the fitting hole. Manufacture of a double locking connector comprising: a resin double locking member that is rotatably or slidably connected to the housing body and locks the locking state by the terminal locking means. Method, so that the housing body has a larger shrinkage ratio than the double locking member,
A double locking connector, wherein a resin material to be used for molding is selected for each molded product, and the housing main body and the double locking member are integrally formed in an assembled state by a multicolor molding method. Can be solved.

According to the method of manufacturing the resin assembly or the double locking connector, the resin molded products connected by the pin connection are integrally formed by the multicolor molding method in the form of being connected by the pin connection. At this time, resin materials having different shrinkage rates are used for the individual resin molded products so that the resin molded product on the side having the engaging pins is more contracted. There is no welding between the outer peripheral surface and the inner peripheral surface of the fitting hole. Therefore, when the molding process is completed, there is no inconvenience in the rotating operation and the sliding operation between the molded products due to the pin connection, and
A resin assembly or a double locking connector in an assembled state in which the connection of the molded products by the pin connection is completed is obtained.

Therefore, a troublesome assembling work such as an operation of connecting molded products by pin connection is not required, and a plurality of molded products can be molded at one time to shorten the molding process. The production cost of the assembly or the double locking connector can be reduced.

Further, since it is not necessary to perform an operation of forcibly elastically deforming one of the members in order to fit the engaging pin into the fitting hole, the projecting length of the engaging pin is increased, and It is possible to deepen the fitting between the mating pin and the fitting hole, and it is also possible to increase the connection strength between the molded products by the pin connection.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a double-locking connector according to an embodiment of the present invention; FIG. . FIG. 1 is a side view showing a temporarily fixed state of a double locking member according to an embodiment of the method for manufacturing a double locking connector of the present invention, and FIG. FIG. 3 is a perspective view showing a form during multicolor molding according to one embodiment, FIG. 3 is a side view showing a fully fixed state of the double locking member in FIG. 1, and FIG. 4 is a cross section taken along line AA in FIG. FIG.

FIGS. 5 and 6 are sectional views of a main part showing an example of the configuration of a molding die used for manufacturing the double locking connector of the above-described embodiment. FIG. FIG. 6 is an explanatory diagram of a mold configuration when molding a member, and FIG. 6 is an explanatory diagram of a mold configuration when molding a housing body.

First, the structure of the double locking connector according to one embodiment will be described, and then a method of manufacturing the double locking connector 20 will be described. The double locking connector 20 of the present embodiment includes a resin housing main body 21 in which the terminal receiving holes 2 are vertically arranged in two stages, and a housing main body 21 for double locking the connection terminals in the terminal receiving holes 2. And a double locking member 22 made of resin, which is pin-connected to the second member.

The housing body 21 has terminal locking means (lances) (not shown) for locking connection terminals inserted into the terminal receiving holes 2 in the respective terminal receiving holes 2. Further, the housing body 21 has a form in which a part of upper and lower walls is cut off so that the rear ends of the connection terminals inserted into the upper and lower terminal receiving holes 2 are exposed. A double locking member 22 is formed on each of the cut parts.

The housing body 21 has engaging pins 21b and 21c on left and right outer wall surfaces 21a opposed to each other and projecting in a direction opposite to the outer wall surfaces 21a. These engagement pins 21b and 21c are formed on the upper edge side and the lower edge side of the outer wall surface 21a, respectively, corresponding to the upper and lower two double locking members 22. Engagement pins 21b, 2
1c are disposed apart from each other in the front-rear direction of the housing body 21. The engagement pin 21b located near the center of the housing body 21 is
Is rotatably pin-connected. And
The engagement pin 21c located near the end of the housing main body 21 is for fixing the double locking member 22 at the double locking position (fully fixed position).

On the other hand, as shown in FIG.
2 includes a top plate portion 22a that covers the cut off portions of the upper and lower walls of the housing body 21, and left and right outer wall portions 22b that are opposed to each other and stand upright on both sides of the top plate portion 22a.
On the inner surface side of the top plate portion 22a, a double locking projection (not shown) is formed. As shown in FIGS. 2 and 4, the left and right outer wall portions 22b facing each other are provided with a fitting hole 22c into which the engaging pin 21b is fitted and a fitting hole 22d into which the engaging pin 21c is fitted. Is formed.

The double locking member 22 includes an engaging pin 21
As shown by an arrow (M) in FIG. 2, the housing body 21 is rotatably connected to the housing main body 21 by the engagement pin 21b as a rotation center by fitting the b into the fitting hole 22c. Further, as shown in FIG. 2, provisional engagement step portions 22 e are formed at the distal end portions of the left and right outer wall portions 22 b of the double locking member 22 so as to hit the fitting holes 22 c of the housing body 21. As shown in FIG. 1, the temporary engagement step 22 e is
Is rotated in the closing direction so that it comes into contact with the engaging pin 21c, so that the double locking projection on the double locking member 22 does not hinder the insertion of the connection terminal. The member 22 is temporarily fixed.

When the double locking member 22 is further pressed in the temporarily fixed state shown in FIG. 1, the distal end side of the outer wall portion 22b is pushed open, and the engaging pin 21c is engaged as shown in FIG. The main fixed state fitted in the hole 22d can be achieved.
In the state shown in FIG. 3, the double locking projection formed on the double locking member 22 locks the locked state of the connection terminal in the terminal receiving hole 2.

The above-described double locking connector 20 is integrally formed by a multicolor molding method with the double locking member 22 being opened to the maximum with respect to the housing body 21 as shown in FIG. First, the double locking member 22 is molded with the mold configuration as shown in FIG. 5, and then, as shown in FIG. 6, a part of the mold is replaced to mold the housing body 21.

For forming the outer surface of the outer wall portion 22b of the double locking member 22, and the fitting hole 22c and the engaging hole 22d in each of the molds used for forming the double locking member 22. The outer side molds 30 and 31 are movable outwardly from the sides as indicated by arrows (N) and (O) in the figure. Further, as shown by an arrow (P) in the figure, a tip side mold 32 for molding the tip end face and the inner face of the double locking member 22 is provided as shown in FIG.
It is movable to the tip side. Also, a rear end side die 33 for molding the rear end surface and the inner surface of the double locking member 22.
Is movable to the rear end side as shown by an arrow (Q) in the figure.

After the injection of the resin material for the double locking member 22 has been completed and the resin material for the housing body 21 is to be injected next, as shown in FIG. The molds 30, 31 are changed to outer side molds 35, 36, and the rear end mold 33 is replaced with the housing side molds 37, 38.
Is changed to

When the above-described continuous forming of the double locking member 22 and the housing main body 21 is performed, in the present embodiment, the housing main body 21 has a larger shrinkage ratio than the double locking member 22. The resin material used for molding is selected for each molded product.

Accordingly, the double locking connector 20 is integrally formed by a multicolor molding method in a form in which the housing main body 21 and the double locking member 22 connected by pin connection are connected to each other by pin connection. At this time, the engagement pin 21
Since resin materials having different shrinkage rates are used for the individual resin molded products so that the housing body 21 having the b and 21c shrinks more, the outer peripheral surfaces of the engaging pins 21b which come into contact with each other at the time of molding are fitted. The inner peripheral surface of the joint hole 22c is not welded.

Therefore, the double locking member 2 by pin connection
When the molding process is completed without causing any inconvenience in the rotation operation of 2, the double locking connector 20 in the assembled state in which the connection between the housing main body 21 and the double locking member 22 by the pin connection is completed. can get.

This eliminates the need for a troublesome assembling operation such as a connection operation between the housing body 21 and the double locking member 22 by pin connection, and allows a plurality of molded products to be molded at once, thereby shortening the molding process. Therefore, the production cost of such a double locking connector 20 can be reduced.

Further, since it is not necessary to perform an operation of forcibly elastically deforming one member to fit the engaging pin 21b into the fitting hole 22c, the projecting length of the engaging pin 21b is increased. The engagement between the engagement pin 21b and the fitting hole 22c can be deepened, and the connection strength between the housing body 21 and the double locking member 22 by pin connection can be increased.

As described above, the multi-color molding is performed by using a resin material having a higher shrinkage rate than the molding having the engagement hole for the molding having the engagement pin. The manufacturing method is not limited to the case of manufacturing the double locking connector as described above, and can be widely applied. Further, the operation between the molded products made possible by the engagement between the engagement pin and the engagement hole is not limited to the above-described rotation operation. For example, the present invention can be applied to a case where the fitting hole is a long hole and the engagement pin is fitted to the fitting hole so as to be slidably connected.

That is, the manufacturing method by the multi-color molding method used in one embodiment comprises a first molded article having engaging pins protruding on opposing wall surfaces in the facing direction of these wall surfaces, And a second molded product which is provided on a wall portion facing the first molded product and is rotatably or slidably connected to the first molded product by the engagement between the engaging pin and the fitting hole. The method can be widely used as a method for manufacturing a resin assembly having: In that case, a resin material used for molding is selected for each molded article so that the first molded article has a larger shrinkage ratio than the second molded article, and the first molded article is formed by the multicolor molding method. By integrally molding the molded article and the second molded article in an assembled state, it is possible to obtain the same operational effects as in the above-described embodiment.

[0033]

According to the method of manufacturing the resin assembly and the method of manufacturing the double locking connector of the present invention, the multi-colored resin molded products connected by pin connection are connected to each other by pin connection. Although they are integrally molded by the molding method, resin materials with different shrinkage rates are used for individual resin molded products so that the resin molded product with the engaging pin shrinks more, The outer peripheral surface of the engaging pin and the inner peripheral surface of the fitting hole are not welded.

Therefore, there is no inconvenience in the turning and sliding operations between the molded products due to the pin connection, and when the molding process is completed, the resin in the assembled state in which the coupling between the molded products by the pin connection is completed. A production assembly or a double locking connector is obtained. Therefore, a troublesome assembling operation such as a connection operation between molded products by pin connection becomes unnecessary, and a plurality of molded products can be molded at a time to shorten the molding process. The production cost of the double locking connector can be reduced.

Further, since it is not necessary to forcibly elastically deform one of the members in order to fit the engaging pin into the fitting hole, the projecting length of the engaging pin is increased, and The fitting between the mating pin and the fitting hole can be deepened, and the connection strength between the molded products by pin connection can be increased.

[Brief description of the drawings]

FIG. 1 is a side view of an embodiment of a double locking connector manufactured by a method for manufacturing a double locking connector according to the present invention, and is a side view showing a temporarily fixed state of a double locking member. .

FIG. 2 is a perspective view showing a form at the time of multicolor molding of the double locking connector of one embodiment of the present invention.

FIG. 3 is a side view of an embodiment of the double locking connector manufactured by the method for manufacturing a double locking connector according to the present invention, and is a side view showing a fully fixed state of the double locking member. .

FIG. 4 is a sectional view taken along line AA in FIG. 2;

FIG. 5 is an explanatory view of a mold configuration for forming a double locking member in the method of manufacturing a double locking connector according to the present invention.

FIG. 6 is an explanatory view of a mold configuration when a housing main body is molded in the method of manufacturing a double locking connector according to the present invention.

FIG. 7 is a perspective view of a conventional double locking connector.

8 is a longitudinal sectional view of the double locking connector shown in FIG. 7 before connecting terminals are inserted.

9 is a longitudinal sectional view showing a temporary fixing state of the double locking connector shown in FIG. 7 before double locking.

FIG. 10 is a longitudinal sectional view showing a double locking state of the double locking connector shown in FIG. 7;

FIG. 11 is a longitudinal sectional view showing a temporarily fixed state before double locking of another example of the conventional double locking connector.

FIG. 12 is a perspective view of a member for double locking of the conventional double locking connector shown in FIG. 11;

FIG. 13 is a side view showing a temporarily fixed state of the conventional double locking connector shown in FIG. 11 before double locking.

[Explanation of symbols]

 2 Terminal accommodation hole 20 Double locking connector 21 Housing body (first molded product) 21a Outer wall surface 21b, 21c Engagement pin 22 Double locking member (second molded product) 22a Top plate portion 22b Outer wall portion 22c Fitting hole 22d Engaging hole 22e Temporarily engaging stepped portion 30, 31 Mold for outer surface 32 Tip mold 33 Rear mold 35, 36 Mold for outer surface 37, 38 Housing side mold

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01R 13/42 B29C 45/14 H01R 43/00

Claims (2)

(57) [Claims] 1. A first molded article having an engaging pin protruding in a direction opposite to the wall surface on an opposing wall surface, and a fitting portion in which a fitting hole in which the engaging pin fits is provided on a wall portion facing the first molded product. And a second molded product rotatably or slidably connected to the first molded product by fitting the engagement pin into the fitting hole. Wherein the shrinkage of the first molded article is smaller than that of the second molded article.
The resin material used for molding each of the molded products is selected so as to be larger than the first molded product.
An end mold, and a rear mold for molding the rear end surface and inner surface of the second molded product.
Forming an end mold, an outer surface of the wall portion of the second molded product, and the fitting hole;
And a mold for the outer surface for making the desired position in the defined cavity.
Molding the second molded product by injecting a resin having a shrinkage rate of
Then, the rear end side mold is connected to the housing for molding the first molded article.
The use side mold, for the outer surface of the outer side mold the first molded article for molding
After replacing the mold, the key defined by the mold
Injecting a resin with a desired shrinkage into the cavity,
A method of manufacturing a resin assembly , wherein the first molded article and the second molded article are integrally molded in an assembled state by molding the molded article. 2. A terminal locking means for locking the connection terminal facing a terminal receiving hole into which a connection terminal connected to an end of the electric wire is inserted. A resin housing body having a configuration provided with an engagement pin protruding in the opposite direction, and a fitting hole in which the engagement pin is fitted is provided on a facing wall portion, and the engagement pin and the fitting hole are provided. And a resin double locking member which is rotatably or slidably connected to the housing main body by the fitting of the resin and locks the locking state by the terminal locking means. A method of manufacturing a connector, in which a resin material used for molding is selected for each molded article so that the housing body has a larger shrinkage ratio than a double locking member, and a multicolor The housing body and the double locking member are assembled by a molding method. Double locking connector manufacturing method that is characterized in that integrally molded in an upright position.