JPH04140004A - Coupling device - Google Patents

Abstract

PURPOSE:To couple a cover, easily and detachably, with a base by providing an inserting section for inserting a coupling member into the base and securing the coupling member in place, an engaged section in the cover to be engaged detachably with the coupling member and a base section of the coupling member to be inserted into the inserting section of the base. CONSTITUTION:When a coupling section 22 is inserted into the inserting section 41 of a base 2, an engaging section 27 of the coupling member 22 engages with the base 2 to limit the movement in the opposite direction from inserting direction. Consequently, movement in the inserting direction is limited by a limiting section 31 of the coupling member 22 which is thereby inserted into the inserting section 41 and secured in place. At that time, engaging section 35 of the coupling member 22 projects from the open face of the base 2. When a cover 3 is fixed, it is applied on the open face of the base 2 and then an engaging section 35 of the coupling member 22 engages resiliently with an engaged section 51 of the cover 3 which is thereby coupled and held while being applied on the base 2. When the cover 3 is removed, it is moved from the base 2 in the removing direction and then the coupling member 22 deforms resiliently thus dropping the cover off the engaging section 35.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention provides a system in which a base of a long box body and a cover attached to an opening surface of this base can be attached and detached while attached. The invention relates to a coupling device for coupling to.

(Prior Art) For example, a residential distribution board has a box formed from a base and a cover attached to an opening surface of the base, and a plurality of breakers and the like are housed within the box.

The base and cover are integrally molded from synthetic resin.

Multiple claw pieces are integrally molded on the edge of the base.
When the cover is attached, the claw pieces elastically engage with the cover, and the cover is removably coupled using the elasticity of the claw pieces.

(Problems to be Solved by the Invention) Incidentally, in the residential distribution board as described above, a box body is provided in a horizontally elongated shape in order to accommodate a plurality of breakers and the like.

However, if the box is made longer in the horizontal direction, the base and cover are more likely to warp, twist, or distort.
The base and cover must be made of hard synthetic resin.

However, if the base and cover are made of hard synthetic resin,
It is not possible to ensure the elasticity of the claw pieces, and the claw pieces are difficult to elastically deform when the cover is attached, making it difficult to attach the cover and, in particular, making it extremely difficult to remove the cover.

The present invention has been made in view of these points, and it is possible to easily attach and detach the cover to and from the base, regardless of the materials of the base and cover, when connecting the base and cover of a long box body. It is an object of the present invention to provide a coupling device that can be coupled.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides a coupling device that includes a coupling member that detachably couples a base of a long box body and a cover attached to an opening surface of the base in an attached state. The base is provided with an insertion part for inserting and fixing the coupling member, and the cover is provided with an engaged part with which the coupling member is removably engaged,
The coupling member is provided with a base portion that is inserted into the insertion portion of the base, and a locking portion that locks to the base and restricts movement in the counter-insertion direction, and a locking portion by the locking portion. A restriction part is provided to restrict movement in the insertion direction in the state,
Further, an engaging portion is provided that protrudes from the opening surface of the base and elastically engages with the engaged portion of the case.

(Function) In the present invention, by inserting the coupling member into the insertion portion of the base, the locking portion of the coupling member locks with the base and movement in the opposite insertion direction is restricted, and the locking portion In the locked state, the movement of the coupling member in the insertion direction is regulated by the regulating portion, so that the coupling member is inserted and fixed in the insertion portion. Furthermore, the engaging portion of the coupling member protrudes from the opening surface of the base.

When the cover is attached, by attaching the cover to the opening surface of the base, the engaging part of the coupling member elastically engages with the engaged part of the cover, and the cover remains attached to the base. Bonds are retained. Furthermore, when the cover is removed, if the cover is moved in the removal direction from the base, the coupling member is elastically deformed and the engaging portion falls off from the cover, allowing the cover to be removed.

(Example) Hereinafter, the configuration of an example of the present invention will be described with reference to the drawings.

Figures 3 and 4 show a residential distribution board, where ■ is a horizontally elongated box, and this box l consists of a base 2 and a cover 3 attached to the opening surface of the base 2. It is composed of a plurality of breakers 4 and the like inside.

The base 2 has a back plate 11 and a side wall 2 at the periphery of the back plate 11 integrally formed of synthetic resin, and the front end of the side wall 12 is formed with a step 13 projecting outward. has been done.

The cover 3 has a front plate part 14 and a peripheral side wall part 15 of the front plate part 14 integrally molded with synthetic resin, and the front plate part 14 has a plurality of levers 4a of a plurality of breakers 4 protruding from the front plate part 14. A window hole 16 is formed.

A plurality of upper and lower joint parts between the base 2 and the cover 3 are connected to the joint member 2 of the joint device 21.
2, which are detachably connected to each other.

As shown in FIG. 1 and FIG. 2 showing the bottom surface of the joining member 22, the joining member 22 has a rectangular plate-shaped base 23 and a base 23 that is bent downward at right angles from one end of the base 23. The bent claw portion 24 is integrally formed of elastic polyacetal resin, for example. At the other end of this base 23, a locking piece 26 is formed by a pair of slits 25, and the tip of this locking piece 26 has a right-angled locking part 2 on one end and a tapered surface on the other end. A locking pawl 29 having a diameter of 28 is formed, and a convex portion 30 is provided at the middle portion of the upper surface of the base 23, and the other end surface of the convex portion 30 is provided with a restricting portion 31.
Constructed as.

On the other hand, at the tip of the claw portion 24, an engaging portion 35 is formed which has a tapered surface 33 on one end side and a slightly tapered engaging surface 34 on the other end side. Further, a plurality of ribs 36 are formed at the corners of the base portion 23 and the claw portion 24.

Furthermore, an insertion portion 41 is provided inside the base 2 for inserting and fixing the other end of the base portion 23 of the coupling member 22. This insertion part 41 includes a pair of holding frames 42 provided in the side wall part 12 of the base 2 at a distance from each other, and holding grooves 43 into which both side edges of the coupling member 22 are inserted and fitted into the opposing surfaces of the respective holding frames 42. Further, a locking pawl 44 to which the locking pawl 29 of the coupling member 22 locks is protrudingly provided on the side wall portion 12 between both holding frames 42, and the locking pawl 44 has a base opening surface. A tapered surface 45 is formed on the side, and a locked surface 46 is formed on the side opposite to the frontage surface. Note that an opening 47 is formed in the back plate portion 11 facing between both the holding frames 42.

Further, a concave engaged portion 51 with which the engaging portion 35 of the coupling member 22 is removably engaged is provided on the inner side near the open end of the side wall portion 15 of the cover 3. Part 51
has a slightly tapered engaged surface 52 on the cover opening surface side, and has a tapered surface 53 on the side opposite to the frontage surface.

Next, the operation of this embodiment will be explained.

First, in order to attach the coupling member 22 to the insertion part 41 of the base 2, the other end side edges of the base 23 of the coupling member 22 are fitted into the holding grooves 43 of both holding frames 42 of the insertion part 41, and then move it. During this movement, the locking piece 2 of the coupling member 22
The locking claw 29 of No. 6 comes into contact with the locked claw 44 of the insertion portion 41,
The locking piece 26 gets over the locking pawl 44 while being elastically deformed. Then, when the locking pawl 29 climbs over the locking pawl 44, the deformation of the locking piece 26 returns due to elasticity, and the locking portion 27 of the locking pawl 29 joins to the locking surface 46 of the locking pawl 44. . At this time, the restricting portion 31 of the coupling member 22 comes into contact with the holding frame 42 to restrict insertion.

The coupling member 22 inserted into the insertion portion 41 in this manner is held between both the holding frames 42, and the locking portion 27 of the locking claw 29 is joined to the locking surface 46 of the locked claw 44 in the opposite insertion direction. The movement of the base 2 is regulated, and the movement of the base 2 in the insertion direction is regulated by contacting the holding frame 42, and the movement of the base 2 is regulated.
The insertion portion 41 prevents removal and is retained.

Furthermore, the claw portion 24 of the coupling member 22 protrudes from the opening surface of the base 2.

Then, to attach cover 3 to base 2, cover 3
is attached to the opening surface of the base 2, and the tip peripheral edge of the side wall portion 15 of the cover 3 is joined to the stepped portion 13 of the side wall portion 12 of the base 2. At this time, the side wall portion 15 of the cover 3
The engaging portion 35 is brought into contact with the connecting portion 35 at the tip of the claw portion 24 and is inserted into the inside of the side wall portion 15 while elastically deforming the connecting member 22 . When the engaging portion 35 reaches the concave engaged portion 51 of the side wall portion 15, the deformation of the coupling member 22 is elastically restored, and the engaging portion 35 is fitted into the engaged portion 51.
The engaging surface 34 of the engaging portion 35 is the engaged surface 52 of the engaged portion 51
to be joined to. Therefore, the cover 3 is held attached to the base 2. Note that the side wall portion 15 of the cover 3
When contacting and pressing the tip of the claw portion 24 of the coupling member 22, the rib 36 of the coupling member 22 contacts the stepped portion 13 of the base 2, so the claw portion 24 of the coupling member 22 is pushed inward of the cover 3. It is possible to prevent the claw part 24 from deforming and moving, for example, from being deformed while being caught on the tip of the side wall part 15 of the cover 3, so that the claw part 24 cannot enter inside the side wall part 15.

In addition, in order to remove the cover 3 from the base 2, the coupling member 22 is elastically deformed by moving the cover 3 in the direction in which the cover 3 is removed from the base 2, contrary to the direction in which the cover 3 is attached. The cover 3 falls off, the coupling of the cover 3 is released, and the cover 3 is removed.

Therefore, in the elongated box 1, the cover 3 can be easily attached to and detached from the base 2.

By setting the elasticity of the coupling member 22 itself, the coupling force between the cover 3 and the base 2 can be freely adjusted.

〔Effect of the invention〕

According to the present invention, since a connecting member is separately used to connect the base of the elongated box body and the cover attached to the opening surface of the base, the connecting member itself is used regardless of the material of the base or the cover. By setting the elasticity of the cover, the bonding force between the cover and the base can be freely adjusted, and the cover can be easily attached to and detached from the base.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an embodiment of the coupling device of the present invention, Fig. 2 is a bottom view of the coupling member, Fig. 3 is a sectional view of a residential distribution board to which the coupling device is applied, and Fig. 4 is a sectional view showing an embodiment of the coupling device of the present invention. FIG. DESCRIPTION OF SYMBOLS 1...Box body, 2...Base, 3...Cover 21...Coupling device, 22...Coupling member, 23...Base, 27...Locking part, 31...Restriction part, 35...Engagement part, 41... insertion part, 51... engaged part. drunken needle

Claims (1)

[Claims] (1) A coupling device comprising a coupling member that removably couples a base of a long box and a cover attached to an opening surface of the base in an attached state, wherein the base an insertion portion for inserting and fixing a member; the cover includes an engaged portion with which the coupling member is removably engaged; the coupling member includes a base portion inserted into the insertion portion of the base; The base is provided with a locking part that locks onto the base and restricts movement in the counter-insertion direction, and a restriction part that restricts movement in the insertion direction when locked by the locking part, and the opening surface of the base A coupling device characterized in that an engaging portion is provided that protrudes further and elastically engages with the engaged portion of the case.