JPH11351218A - Connection structure of body to be connected - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the sufficient connection force even when the tolerance of each manufacturing dimension of a projecting body and a fitting hole is not so strict in a structure in which bodies to be connected are connected to each other by fitting the projecting body in the fitting hole. SOLUTION: In a structure in which a pair of half-split adapters (bodies to be connected) A11 , A12 are connected to each other by fitting a projecting body 2 of one half-split adapter (a body to be connected) A11 into a fitting hole 3 of the other half-split adapter (a body to be connected) A12 , an expansion slit 4 to communicate with the fitting hole 3 is provided orthogonal to the thickness direction. Though the projecting body 2 is approximately columnar, a part from a center part and a tip part in its longitudinal direction is formed of a slightly tapered columnar, and is easy to fit in the fitting hole 3. The fitting hole 3 corresponds to the sectional shape of a base end part of the approximately columnar projecting body 2, and is circular in section. Two projecting bodies 2 and two fitting holes 3 are provided in a connection end face 1 of the respective half-split adapters A11 , A12 along the diagonal direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure in which a projection of one connected body is fitted into a fitting hole of another connected body, and the connected bodies are connected to each other.

[0002]

2. Description of the Related Art For example, a fitting is inserted into a receiving port 12 provided in a box B as shown in FIG. 1 to absorb a difference between the inner diameter of the receiving port 12 and the outer diameter of a corrugated conduit P. And an adapter A for enabling connection of the corrugated conduit P to the receptacle 12.
_{As 0} , there is a case where a pair of half adapters A ₀₁ and A ₀₂ each having a cylindrical body divided into two by a plane including the axis thereof and formed into a half cylindrical shape are used. As shown in FIG. 14, the connection structure of the pair of half adapters A ₀₁ and A ₀₂ is such that the projection 2 and the insertion hole 3 are opposed to each other on the connection end face 1 of each half adapter A ₀₁ and A _02. by, a plurality of sets (in the illustrated example four pairs) in advance is provided, the projections 2 on one half adapters a _01, there is to be fitted into the fitting hole 3 of the other half adapter a _02.

However, the connection between the projection 2 and the fitting hole 3 cannot be made unless the dimensional tolerance of the two is within an allowable range. That is, if the projection 2 is too large with respect to the insertion hole 3, the insertion itself cannot be performed. If the projection 2 is forcibly inserted with an excessively large force, the projection 2 is broken. Conversely, if the projection 2 is too small with respect to the insertion hole 3, even though the projection 2 can be inserted into the insertion hole 3, the coupling force is reduced, and the connection cannot be reliably performed.
As described above, in the connection structure in which the protrusions 2 are fitted into the fitting holes 3, there is a problem that a sufficient connection cannot be achieved unless the dimensional tolerances of the two are tight.

[0004]

SUMMARY OF THE INVENTION According to the present invention, in a structure in which connected objects are connected to each other by inserting a projection into an insertion hole, the tolerances of the respective manufacturing dimensions of the projection and the insertion hole are not so tight. However, it is an object of the present invention to obtain a sufficient connection force.

[0005]

In order to solve this problem, a means adopted by the present invention is to insert a projection of one connected object into a fitting hole of the other connected object, and In the structure for interconnecting the two, a widening slit communicating with the fitting hole is provided so that the fitting hole can be expanded in the thickness direction.

[0006] In the fitting hole provided in one connected body,
Since the expansion slit communicating with this is provided in the thickness direction, even if the size of the projection provided on the other connected body is slightly larger than the insertion hole, the projection is inserted into the insertion hole. Then, with the insertion hole slightly expanded in the thickness direction, the projection is inserted into the insertion hole. Further, after the projection is inserted into the insertion hole, the peripheral portion of the expanded insertion hole attempts to restore to the original shape, and by this shape restoring force, the projection inserted into the insertion hole is It is pinched from around it. As a result, the connected bodies are connected to each other with a large connecting force. As described above, since the dimensional tolerances between the projection and the insertion hole are not so strict, and the projection can be inserted into the insertion hole even if the projection is slightly larger than the insertion hole, the production of the connected object itself can be performed. Also becomes easier.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to examples. 1, using the adapter A ₁ mold halves, an exploded perspective view of a state before the receptacle 12 provided in the box B to connect Namizuke conduit P, FIG. 2, like front view FIG. 3 is a partial perspective view in which a corrugated conduit P is connected to one of the receptacles 12 provided in the box B, FIG. 4 is a sectional view of the same, and FIG. X
FIG. 6 is an enlarged sectional view taken along line X-X (a sectional view taken along line X′-X ′ in FIG. 4), FIG. 6 is a perspective view of a pair of half adapters A ₁₁ and A ₁₂ , and FIG. it is a perspective view of a _1. In the box B, two cylindrical corrugated conduits P each having two cylindrical portions are provided on opposing upper and lower portions of the peripheral wall 11.
Are provided integrally with each other. An insertion hole 13 for electric wires is provided at a portion of the peripheral wall 11 of the box B where the receiving port 12 is provided, and communicates with the inside of the box B. Opposite portions of the receptacle 12 are cut out in a shape obtained by rotating the “U” clockwise by 90 °, and the portion surrounded by the notch 14 is deformed with its upper end serving as a fulcrum. The elastic deformation portion 15 is provided. An arc-shaped engaging claw 16 is integrally provided on the inner peripheral surface side of the lower end portion of the elastic deformation portion 15 in a plan view. An L-shaped operation piece 17 for deforming the deforming portion 15 outward is integrally provided upward.

Also, as shown in FIGS.
And adapter A₁Is made of resin, and the cylindrical body is
A pair of half halves divided in half by a plane including the axis
Puta A ₁₁, A₁₂Are connected together, and the
The inside diameter of the receptacle 12 provided in the box B and the insertion into the receptacle 12
When there is a large difference between the outer diameter of the corrugated conduit P to be inserted
The corrugated wire is absorbed in the socket 12 by absorbing the diameter difference.
This is a member for enabling connection of the pipe P. A pair of halves
Dapta A₁₁, A₁₂Each connection end face 1 has a plurality of sets (examples)
In this case, four sets of projections 2 and fitting holes 3 are provided so as to face each other.
Have been. The protrusion 2 has a substantially cylindrical shape,
Gently tapered cylinder between center and tip
It is formed in a shape so that it can be easily fitted into the fitting hole 3.
You. The insertion hole 3 is a cross section of the base end of the substantially cylindrical projection 2.
It has a circular cross section corresponding to the shape. Each half a
Dapta A₁₁, A₁₂The connection end face 1 has two projections 2
And two fitting holes 3 are also provided along the diagonal direction.
Have been. Also, each half adapter A₁₁, A₁₂Fitting hole
3, a widening slit 4 communicating with the fitting hole 3 is provided.
It is provided orthogonal to the thickness direction Q (see FIG. 8). This
The depth of the widening slit 4 is the same as the depth of the insertion hole 3.
(See FIG. 9). The fitting hole 3 communicates with the fitting hole 3.
By providing the widening slit 4, the insertion hole 3
It can be expanded along the thickness direction.

An engagement claw 16 is provided in the receptacle 12 of the corrugated conduit P slightly inward from the inner peripheral surface thereof, and the outer peripheral surfaces of the half adapters A ₁₁ , A ₁₂ are provided on the outer peripheral surfaces thereof. A semi-annular engagement groove 5 engageable with the engagement claw 16 is provided, and an end of the inner peripheral surface along the axial direction is provided with the corrugated conduit P.
A semi-annular insertion end regulating protrusion 6 for determining the insertion end of the corrugated conduit P is inserted into the groove 10 of the corrugated conduit P at the center of the inner peripheral surface along the axial direction. A semi-annular engaging projection 7 to be engaged is provided.

In order to integrally connect the pair of half adapters A ₁₁ and A _12, as shown in FIG. 6, the connection end faces 1 are opposed to each other, and one half adapter A ₁₁ is connected to the other half adapter A ₁₁ . each protrusion 2, when fitted is pushed to each fitting hole 3 of the other half adapter a ₁₂ (FIGS. 9 and 10), a pair of half adapters a _11, a ₁₂ is integrally connected to the cylinder the Jo adapter a ₁ (FIG. 8). Here, the outer diameter of the projection 2 is slightly larger than the inner diameter of the insertion hole 3, and in the connection structure of the conventional half adapter, the projection 2 is inserted into the insertion hole 3.
Even when it is not possible to fit
In connection with this, since the widening slit 4 is provided in a direction orthogonal to the thickness direction Q, as shown by a solid line in FIG. As a result, the diameter of the insertion hole 3 becomes slightly larger, and the projection 2 can be inserted. In addition, after the fitting, the protrusion 2 fitted into the fitting hole 3 is substantially entirely formed by the shape restoring force of the peripheral portion of the fitting hole 3 expanded in the thickness direction Q to restore the original shape. It is strongly pinched from the circumference. By this action, a pair of half adapters A ₁₁ , A
The coupling force of ₁₂ is considerably large. Note that FIG.
, The two-dot chain line indicates the original shape of the periphery of the fitting hole 3.

As described above, a pair of half adapters A
_11, A _12, since the cylindrical adapter A ₁ are integrally connected, with the pair of half adapters A _11, A _12,
The connection of the corrugated conduit P to the receptacle 12 provided in the box B is performed as follows. First, FIGS. 1 and 2
As shown in FIG. 2, a pair of half adapters A ₁₁ and A ₁₂ are arranged on both sides of one end of the corrugated conduit P, and as shown by a two-dot chain line in FIG. A pair of half adapters A ₁₁ , A ₁₂ are applied to the outside of the lower end, and one of the projections 2 is fitted into the other fitting hole 3, and the pair of half adapters A ₁₁ , A ₁₂ is attached. Connect them together. As a result, the half adapters A ₁₁ , A
Engaging protrusions 7 of ₁₂ is engaged, the adapter A ₁ can not come out against the corrugated conduit P. Note that one end surface of the corrugated conduit P is in contact with the insertion end regulating protrusion 6 of the half adapters A ₁₁ and A ₁₂ , and the insertion end of the corrugated conduit P with respect to the adapter A ₁ is regulated.

Next, when the adapter A ₁ engaged with the outside of one end of the corrugated conduit P is pushed into the inside of the receptacle 12 provided in the box B through the opening, the adapter A ₁ is pressed.
When the engaging claw 16 of the receptacle 12 elastically contacts the outer peripheral surface of the adapter, the pair of elastically deforming portions 15 provided opposite to the peripheral surface of the receptacle 12 are elastically deformed toward the outer peripheral side, and When the lower end face of the a ₁ abuts the peripheral wall 11 of the box B, a pair of elastically deformable portion 15 which has been elastically deformed toward the outer peripheral side
There was restored to the original shape, claws 16 provided at its lower end is engaged by fitting the engaging groove 5 of the outer peripheral surface of the adapter A ₁ (FIG. 4). As a result, the adapter A ₁ fitted into the receptacle 12 of the corrugated conduit P does not come out of the receptacle 12, and the corrugated conduit P is connected to the receptacle 12 via the adapter A _1. Is done.

The pair of half adapters A ₁₁ and A ₁₂ constituting the adapter A ₁ of the above embodiment are separate bodies, but the adapter A ₂ shown in FIG. 11 is a pair of half adapters. A ₂₁ and A ₂₂ are connected to each other at one end in the circumferential direction via a hinge connection portion 8, and a pair of half adapters A
_In this configuration, two sets of protrusions 2 and fitting holes 3 are provided only on one set of connection end faces ₂₁ and A ₂₂ . Then, the half adapters A ₂₁ and A ₂₂ hingedly connected to each other are pivoted about the hinge connection portion 8 so that the protrusions provided on the connection end surface 1 of the one half adapter A _21. 2, is fitted into the fitting holes 3 provided in the connection end face 1 of the other half adapter a _22. The adapter A ₂ of this embodiment has an advantage that the half adapter A ₂₁ (A ₂₂ ) is not lost because the half adapters A ₂₁ and A ₂₂ constituting the adapter A ₂ are hinged to each other. is there.

The embodiment shown in FIG. 12 embodies the present invention when a pair of cylindrical bodies 21 are connected to each other at their annular end faces 22. That is, four sets of projections 2 and fitting holes 3 are provided on the end face 22 of each cylindrical body 21, and the fitting holes 3 are each provided with an expanding slit 4 ′ communicating with the circumference. It is provided along the direction. For this reason, although the expanding slit 4 'has an arc shape, the operation of the expanding slit 4' at the time of connection is the same as described above.

Further, in the above embodiment, the case where the pair of half-cylindrical bodies are connected by the protrusions 2 and the fitting holes 3 into which the protrusions 2 are fitted has been described. However, as shown in FIG. A projection 2 and an insertion hole 3 into which the projection 2 is inserted are provided on a connection end face 32 of the base 31, and the projection 2 provided on one plate 31 is replaced with an insertion hole provided on the other plate 31. Also, in the case where the plate bodies 21 are connected to each other by fitting them into the fitting holes 3, the connecting force between the plate bodies 31 can be increased by providing the expanding slits 4 communicating with the fitting holes 3 in the fitting holes 3. .

As described above, according to the present invention, the protrusion provided on one connection end face of the two connected bodies connected to each other is fitted into the fitting hole provided on the other connection end face.
With a structure that connects both connected objects, the connecting force of the two connected objects can be increased without any concern about the shape itself of the connected objects connected to each other.

When a plurality of expanding slits are provided so as to communicate with the fitting holes, the expanding holes can be expanded in directions other than the thickness direction.

Further, it is most effective that the expanding slit provided in communication with the fitting hole is provided in a direction orthogonal to the thickness direction of the portion where the fitting hole is provided, but the expanding slit is provided. Even if the direction is not strictly orthogonal to the thickness direction and is slightly deviated, the above-described effects of the present invention can be obtained.

[0019]

According to the present invention, the projection of one connected object is
In the structure in which the connected objects are connected to each other by being inserted into the insertion holes of the other connected objects, an expansion slit is provided along the thickness direction communicating with the insertion holes. Even if is slightly larger than the insertion hole, when the projection is inserted into the insertion hole, the projection is inserted into the insertion hole in a state where the insertion hole is slightly expanded, and at the same time after the insertion. The protruding body is pinched by the shape restoring force of the periphery of the expanded insertion hole. As a result, only by providing a slit communicating with the insertion hole of the connected body, even if the size of the projection is slightly larger than the insertion hole, the projection can be inserted, and the dimensional tolerance of the projection with respect to the insertion hole is reduced. It is not necessary to be strict, and the mutual connecting force of the connected objects is much larger.

[Brief description of the drawings]

[1] using the adapter A ₁ mold halves, it is an exploded perspective view of a state before the receptacle 12 provided in the box B to connect Namizuke conduit P.

FIG. 2 is a front view of the same.

FIG. 3 is a partial perspective view in which a corrugated conduit tube P is connected to one receptacle 12 provided in a box B;

FIG. 4 is a sectional view of the same.

5 is an enlarged sectional view taken along line XX of FIG. 2 (XX′-X ′ of FIG. 4);
FIG.

[6] of the pair constituting the adapter A ₁ half Adapter A
₁₁ is a perspective view of the A _12.

7 is a perspective view of the adapter A ₁ in which a pair of half adapters A _11, A ₁₂ are connected.

FIG. 8 is a front view of a half adapter A ₁₁ (A ₁₂ ).

FIG. 9 is an enlarged sectional view showing a state in which the protrusion 2 is fitted into the fitting hole 3 expanded in the thickness direction Q.

FIG. 10 is a sectional view taken along line YY of FIG. 9;

[11] pair of half adapters A _21, A ₂₂ is a perspective view of unconsolidated when the hinged adapter A _2.

FIG. 12 shows a cylindrical body 21 connected by the structure of the present invention.
It is a perspective view of.

FIG. 13 is a perspective view of a plate 31 connected by the structure of the present invention.

FIG. 14 shows a pair of half adapters A according to a conventional connection structure.
It is an exploded perspective view of ₀₁ and _A02 .

[Explanation of symbols]

A _11, A _12: half Adapter (the connected body) A _21, A _22: half Adapter (the connected body) B: Box P: conduit with waves (Namizukekan) Q: thickness direction 2: projections Body 3: Fitting holes 4, 4 ': Expanding slit 5: Engagement groove 7: Engagement protrusion 10: Groove portion of corrugated conduit 12: Receptacle 16: Engagement claw 21: Cylindrical body (connected body) 31: plate (connected body) 1

Claims (4)

[Claims] 1. A structure in which a projection of one connected body is fitted into a fitting hole of the other connected body to connect the connected bodies together, and the fitting hole is expanded in a thickness direction. A connecting structure for a body to be connected, wherein an expanding slit communicating with the fitting hole is provided so as to be openable. 2. The connecting structure of a connected body according to claim 1, wherein the expanding slit is provided orthogonal to a thickness direction. 3. The connecting structure of a connected body according to claim 1, wherein the connected body is a half-split cylindrical body obtained by dividing a cylindrical body into two parts by a plane including an axis thereof. 4. The connected body has a half-cylindrical shape obtained by dividing a cylindrical body into two parts by a plane including the axis thereof, and has an inner diameter of a receiving port of a corrugated pipe provided in a box or the like. In order to eliminate the difference in diameter from the outer diameter of the corrugated pipe, a half adapter is fitted inside the socket, and the outer peripheral surface of each half adapter projects from the inner peripheral surface of the socket. An engaging groove for engaging with the provided engaging claw is provided, and an engaging protrusion for engaging with the groove of the corrugated tube is provided on an inner peripheral surface thereof. The connection structure of a connected body according to claim 1.