JPH0314574Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is a screw tightening method in which a bolt is provided on one fixed housing, a nut is provided on the other housing, and the two are fitted together by tightening the screws. This invention relates to type connector housings, and in particular, to prevent the joint of synthetic resin connector housings from being destroyed by the tightening force of bolts and nuts.

[Prior Art] FIGS. 3 and 4 are diagrams showing a conventional example, and are diagrams showing a state in which a housing is fitted by threading a bolt and a nut. In FIG. 3, the screw-clamped connector housing consists of one male housing B and the other female housing A. One male housing B has a rotatable bolt 10 in its center, and the other female The mold housing A has a structure in which a nut 12 is embedded substantially below the tip 11a of the resin 11 on the housing fitting surface. Furthermore, this nut 12
is insert molded to be integrated with the resin of the housing. Fit both housings above,
By applying a normal force from the bolt head 7 with a tightening jig, the bolt and nut are engaged and screwed together, and the male and female housings are connected.

[Problem to be solved by the invention] In the conventional structure described above, both housings are inserted and inserted, and the bolt 10 provided in the center of the male housing B and the nut 12 buried in the center of the female housing A are connected. By tightening with a force within a normal range using a tightening jig, the threading of the bolt and nut progresses, and the connection between both housings progresses. Then, the resin tip portion 11a at the center of the female housing A
comes into contact with the stopper 9 fitted into the bolt 10 provided in the center of the male housing B,
The connection is complete. However, if a tightening jig is used to apply more force than necessary, the resin 11 at the center of the female housing A will succumb to the tensile force due to the rotation of the bolt 10, and the nut 12 will tighten the resin 11. It moves toward the tip of the. So-called nut lifting 12a occurs, and the stopper 9
The resin tip portion 11a that is in contact with the housing deforms into a housing resin deformation portion 14, as shown in FIG. In this way, if the bolts are overtightened, there is a risk that the connector housing will be destroyed.

The present invention prevents the nut from lifting even if the bolt is overtightened, thereby preventing the connector housing from being destroyed.

[Means for Solving the Problems] The present invention provides a screw-tight connector housing in which a bolt 17 is provided in the center of one connector housing B and a nut 19 is provided in the center of the other connector housing A. A stopper 15 is provided on both sides of the fitting of the rotatable bolt 17 of the connector housing B, and the nut 19 embedded in the resin part 18 of the other connector housing A has a cylindrical collar part 6 that is a metal side wall. have,
This screw-clamped connector housing is characterized in that the upper surface 16a of the collar portion is extended to be flush with the resin tip 18a of the connector housing.

[Function] As shown in FIGS. 5 and 6, the nut 19 of the present invention is provided with a collar portion 16 extending on the same plane as the tip 18a of the resin 18 of the housing, so that the bolt 17 and the nut 19, the fitting of both housings progresses, and the upper end of the collar part 1
6a directly contacts the stopper 15 provided on the bolt 17, and the nut does not lift up and cannot be tightened any further.

[Example] Hereinafter, an example of the present invention will be described. 1 and 2 are perspective views showing the external shapes of conventional male and female connector housings A and B, and the present invention also has a similar external shape. FIGS. 5 and 6 are sectional views of essential parts showing how the male and female connector housings A and B of the present invention are fitted together.

Bolt 17 in the center of male connector housing B
A nut 19 was provided at the center of the female connector housing A. A stopper 1 is provided on the mating surface side of the rotatable bolt 17 of the male connector housing B.
5, and the resin part 18 of the female connector housing A
A nut 19 having a cylindrical collar portion 16, which is a metal side wall, is embedded in the hole. Then, the nut 19 is buried in a position where the upper surface 16a of the collar portion extends to the same plane as the connector housing resin tip portion 18a.

FIG. 7 is a perspective view showing the external shape of the nut 19 embedded in the resin portion 18 of the female connector housing A of the present invention. The nut 19 having the collar portion 16 is formed by processing a square metal prism, and has a collar portion 16 having a bolt guide hole from the center of the upper part, and a female screw portion 20 at the lower part. The nut 19 is embedded in the resin part 18 of the female connector housing A, and a slip-off prevention groove 2 is provided on the lower outer peripheral surface of the nut 19 for fixing the nut 19.
3 is provided.

The method of embedding is to insert the upper surface 16a of the collar part of the metal nut 19 into the resin tip part 1 of the female connector housing.
8a, so that the upper surface 16a of the collar part comes into contact with the stopper 15 of the male connector housing when the male and female connector housings are connected.

[Effects of the invention] The present invention has a structure in which the upper surface of the collar of the metal nut embedded in the resin part of the housing is extended to be on the same plane as the resin tip of the connector housing, which prevents the bolt from being over-tightened. This also has the effect of preventing the nut from lifting up and preventing the connector housing from being destroyed.

[Brief explanation of the drawing]

1 and 2 are perspective views of connector housings according to the present invention, FIG. 1 being a male connector housing and FIG. 2 being a female connector housing. FIGS. 3 and 4 are cross-sectional views of main parts showing the fitted state of conventional male and female connector housings. FIGS. 5 and 6 are cross-sectional views of essential parts showing the fitted state of the male and female connector housings of the present invention. FIG. 7 is a perspective view showing the external shape of a nut having a collar portion according to the present invention. A: Female connector housing, B: Male connector housing, 12, 19: Nut, 10, 17: Bolt, 7: Bolt head, 9, 15: Stopper,
10a: Nut lifting, 11, 18: Resin part, 14: Housing resin deformation part, 16: Collar part, 16a: Upper surface of collar part, 18a: Resin tip part, 20: Female thread part, 21: Male thread part, 22 : Guide hole, 23: Pull-out prevention groove.

Claims (1)

[Scope of utility model registration request] In a screw-tight connector housing in which a bolt is provided in the center of one connector housing and a nut is provided in the center of the other connector housing, a stopper is provided on the fitting surface side of the rotatable bolt of the one connector housing. , the nut embedded in the resin part of the other connector housing has a concave cylindrical collar part that is a metal side wall, and has a structure in which the top surface of the collar part extends to be on the same plane as the resin tip of the connector housing. A screw-clamp type connector housing characterized by: