JPH019182Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the structure of a gasket used as a seal for the lidded portion of a terminal box.

The conventional fastening structure for the gasket used in the lid of this type of terminal box was to provide a concave groove on the upper surface of the annular opening edge of the terminal box body, and to fit a corresponding annular gasket into the groove. . In such a configuration,
If a part of the gasket sticks to the lid when the lid is opened and closed, the entire gasket is pulled up from the groove.

In order to improve this, as is known from Japanese Utility Model Publication No. 51-6615, a concave portion is formed in the side wall of the concave groove, and a convex piece is extended from the packing toward the concave portion. A configuration is provided in which the material is bonded within the recess.

However, the above-mentioned adhesion process requires extra labor and has the drawback of increasing product cost. In addition, if the adhesive technique was poor, the seal could not be held in place, resulting in a lack of reliability. Furthermore, since the adhesion quality cannot be visually inspected, there is a drawback that the inspection is time-consuming.

Therefore, the present invention provides a terminal box main body 42a, a lid 66 configured to be able to be covered over the opening of the terminal box main body 42a, and annular joining portions 71, 70 of the terminal box main body 42a and the lid 66. An annular gasket 67 made of an elastic material is interposed therebetween, and the gasket 67 has a concave groove 74 whose surface is open at the joint portion 71 or 70 of one of the main body 42a or the lid body 66. On the other hand, the convex side wall 73 on the inner circumferential side of the concave groove 74 has the concave groove 7 at an appropriate number of locations.
Retraction slit 7 whose surface is open similarly to 4
7 is provided in a state that is continuous with the concave groove 74 in the lateral direction, and the retraction slit 77 is provided with a tongue-shaped engagement formed of an integral material, which is respectively extended in the lateral direction from the above-mentioned gasket 67. The piece 80 is positioned, and the tip of the engagement piece 80 is made to protrude laterally from the retraction slit 77 and is formed into a bulged portion 80a having a width W larger than the width W of the retraction slit 77. Then, the bulge 8
By providing the structure of the terminal box packing in which the side wall 73 is elastically sandwiched between the inner surface 81 of the protruding portion of 0a and the side surface of the packing 67, the first point is that when installing the packing in the groove, The structure requires only the effort of mounting without requiring extra adhesive work, the second point is that the anchor effect can be fully exerted after mounting, and the third point is that the structure should be such that visual inspection after mounting is easy. This solves the above-mentioned conventional drawbacks.

The drawings showing the embodiments of the present application will be described below. 1 and 2 show electromagnetic valves, 1 is a well-known electromagnet, 2 is a built-in lamp device, and 3 is a valve device. The electromagnet 1 is provided with a coil and a movable iron core in a housing 12 as is well known, and is configured to operate a spool of a valve device depending on whether or not electricity is supplied from a power source. The housing 12 is fixed with the contact portion 31 in contact with the valve device. Reference numeral 23 indicates a fastening nut, and 26 indicates a lamp accommodating portion having a transparent window 30.

Next, the valve device 3 will be explained. Reference numeral 40 denotes a generally known valve body, and although not shown, a valve switching mechanism such as a spool and a spool return spring is provided therein as is well known. This valve body 40
In FIG. 2, a mounting surface 40a is formed on the upper side for mounting a terminal box, which will be described later.
A plurality of mounting screw holes 41 are provided in Oa. 42 is a terminal box. This terminal box 42 consists of a main body 42a and a lid body 66, in which 43 is a bottom wall, 44 is a mounting hole provided in the bottom wall 43 to match the mounting screw hole 41, and this mounting hole is A mounting screw 45 is inserted into the hole 44 and screwed into the mounting screw hole 41, thereby integrally fixing the terminal box 42 to the valve body 40. 48 is a side wall, and 49 is a plug pin insertion hole provided in the side wall 48, into which the removable plug pin 18 used for supplying power to the electromagnet 1 is inserted. Reference numeral 50 denotes side walls on both sides, which can be bent to some extent due to their own elasticity. Reference numerals 52, 52 are stopper pieces protruding near the lower edge of the inner surface of the side wall 50, and are designed to catch the left and right movement of the receptacle main body in FIG. These stopper pieces 52,5
2 may be provided protrudingly from the bottom wall 43. Next, 53 is a receptacle for power supply for operation fitted in the terminal box 42. In this receptacle 53, 54 is a receptacle body, which is molded from a synthetic resin material. Reference numerals 65 and 65 each indicate a terminal screw, and after the terminal screw 65 is screwed into the nut 63, its tip end is fitted into the screw insertion hole 59, thereby preventing the socket contact 61 from being pulled out. Reference numeral 66 denotes a cover plate that covers the main body 42a of the terminal box, and a gasket 67 is placed on the upper surface of the joining part 71 of the terminal box main body 42a, and the cover plate is covered from above and passed through the hole 76 of the overhang part 75. It is attached by tightening with screws 68. 66a is a wire port.

Next, the joining parts 71, 7 between the main body 42a and the lid 66
The configuration of 0 will be explained. These configurations are illustrated in particular detail in FIGS. 3 to 9. In the figure, reference numeral 74 indicates a groove provided around the lid 66, into which one surface 67 of the packing 67 is sunk. 72 and 73 are horizontal walls formed on the outer and inner peripheral sides of the groove 74, and the height of the horizontal wall 73 is higher than that of the horizontal wall 72. Reference numeral 72' denotes a regulating surface to be brought into contact with the other party during joining, and 86, 87, and 88 are surfaces formed on the upper surface of the side wall (joining portion 71), which are arranged in order on the regulating surface 7.
2', the abutting surface for the corner 67' of the packing, which has an inclined surface where the horizontal wall 73 side is lower with respect to the joining direction (direction of arrow H), and the remaining surface. show. In addition, in actual practice, the heights of the horizontal walls 72 and 73 may be exchanged with each other. Furthermore, the structures of the joining parts 70 and 71 are relative, and the upper and lower joining parts in FIG. 6 may be replaced. In the above configuration, the sixth
When the lid 66 is attached to the main body 42a from the state shown in the figure, the result will be as shown in FIG. 5. Next, the above-mentioned gasket 67 has an annular shape as shown in FIG. This may be formed by punching out an elastic packing material (plate-shaped), or may be manufactured by other well-known means, such as plastic forming. On the inner circumferential surface of the gasket 67, tongue-shaped engaging pieces 80 are integrally formed and extend from a suitable number of places, for example, two places on each side, for a total of four places, as shown in the figure. This engagement piece 80
is inserted into a notched retraction slit 77 formed in the horizontal wall 73, and as shown in FIG. larger than the width w of
and the side walls 7 on both sides of the retracting slit with the inner surface 81 of the protruding portion of the bulging portion 80a as a fitting surface.
By elastically abutting the side walls 84 of 3 and sandwiching both sides of the side wall 73 between the gasket 64 and the bulging portion 80a, this serves as an anchor to float the gasket 64 from the groove 74. It is designed to prevent this. Reference numeral 78 indicates a recess for retaining the engagement piece.

As described above, in the present invention, when removing the lid 66 of the terminal box after a long period of time for maintenance and inspection, a part of the gasket 67 adheres to the other side, and the gasket 67 is pulled up from the concave groove 74. Even if a force is applied in the direction, the bulging portion 80a is located on the opposite side of the packing 67 beyond the side wall 73 in the direction perpendicular to the pulling direction, and the inner surface 81 of the bulging portion of the bulging portion 80a Since it is in elastic contact with the side surface 84 of the side wall 73, this bulging portion 80a does not easily come off even if the gasket 67 is pulled up, and is highly effective in preventing the gasket 67 from lifting up with high reliability.

Furthermore, even if the bulging portion 80a is formed with the width W larger than the width W of the slit 77 as described above, the fitting of the packing 67 to the groove 74 can be done by simply attaching the packing 67 from the state shown in FIG. There is a shape effect that allows the attachment of the packing 67 and the positioning of the bulging portion 80a beyond the side wall 73 at the same time by simply moving the fitting 67 in the direction of the groove 74. There is also the effect that the cost can be reduced by eliminating the trouble of gluing the 80 with adhesive after it is attached.

Furthermore, the bulge 80a is properly attached,
Inspection of whether the anchor can be effective or not is also carried out.
Unlike conventional examples using adhesives, there is also an operational effect that can be quickly achieved by visual inspection.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and FIG. 1 is a partially cutaway plan view, FIG. 2 is a partially cutaway front view, FIG. 3 is a view of the lid as seen from the inner side, and FIG. 5 is an enlarged sectional view of the main part centered on the packing position in FIG. 2, FIG. 6 is a sectional view showing the state before joining in FIG. 5, and FIG. FIG. 8 is an exploded view of FIG. 7, and FIG. 9 is a partial perspective view for explaining the engagement piece in FIG. Part plan view. 66... Lid body, 42a... Main body, 67... Packing, 70, 71... Joining part, 74... Concave groove, 7
7...Retraction slit, 80a...Bulging portion.

Claims (1)

[Scope of utility model registration request] The terminal box body 42a, the lid 66 configured to be able to be covered over the opening of the terminal box body 42a, and the annular joining portions 71, 7 of the terminal box body 42a and the lid 66.
0, the gasket 67 has an annular gasket 67 formed of an elastic material and is interposed between the joint portion 71 or 70 of one of the main body 42a or the lid body 66.
A concave groove 74 with an open surface is provided around the groove, and the mounting is carried out in such a manner that one side is recessed and the other side is exposed. Retraction slits 77 whose surfaces are open in the same way as the grooves 74 are provided at a suitable number of locations so as to be continuous with the grooves 74 in the lateral direction. Tongue-shaped engaging pieces 80 formed of an integral material are positioned so as to extend correspondingly toward the respective sides, and the engaging pieces 8
The tip at 0 projects laterally from the retraction slit 77 and has a width dimension w of the retraction slit 77.
The bulging portion 80a has a shape having a width W larger than that of the bulge 80a.
A terminal box packing structure characterized in that a side wall 73 is elastically sandwiched between an inner surface 81 of the protruding portion of the bulged portion 80a and a side surface of the packing 67.