JP7201157B2 - Connection cylinder part, terminal, crimping die, connection structure and construction method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a connection tube portion, a terminal , a crimping die, a connection structure, and a construction method.

When connecting a conductor of an electric wire/cable to equipment inside a panel such as a terminal block or a breaker, the terminal is usually connected to the tip of the conductor and then connected. When connecting a terminal to a conductor of an electric wire/cable, insert the conductor into the connecting tube portion of the terminal, crimp the connecting tube portion together with the inserted wire/cable conductor with a dice, and connect the connecting tube portion and the conductor. By electrically and mechanically connecting the conductor of the wire/cable and the terminal, it is electrically and mechanically connected.

Also, when extending an electric wire/cable, a conductor connecting tube having connecting tube portions on both sides (it can be said that the conductor connecting tube itself is the connecting tube portion) is used. Then, by inserting the ends of the conductors of the two electric wires/cables to be connected into the connecting tube portions at both ends of the conductor connecting tube, respectively, and crimping the conductor connecting tube in a predetermined procedure, each conductor and the conductor connecting tube are connected. are electrically and mechanically connected to extend the electric wire/cable.

The crimping method includes crimping for locally crimping the connecting tube portion and compression for crimping the connecting tube portion and the conductor connecting tube as a whole. When crimping the connecting cylinder, select a die that matches the size of the conductor to be inserted (conductor cross-sectional area [mm ² ]), and crimp the designated position of the connecting cylinder where the conductor is inserted. to This is the same for crimping and compression (see Non-Patent Document 1, etc. for examples of crimping work, see Non-Patent Document 2, etc. for examples of compression work, and see Non-Patent Document 2, etc. for examples of compression work). See Patent Document 3, etc.).

In addition, when connecting the conductors of electric wires/cables and terminals or connecting cylinders of conductor connection pipes by crimping them properly, conventionally, in order to connect them properly electrically and mechanically, Various ideas have been made (see, for example, Patent Documents 1 to 3, etc.).

JP 2012-243705 A JP-A-10-022040 Japanese Utility Model Laid-Open No. 59-39870

Izumi Seiki Seisakusho Co., Ltd., "Charged Hydraulic Multifunctional Tool REC-Li200M/REC-Li205M" Instruction Manual, p. 12-13 Japan Electric Power Cable Connection Technology Association, "Tape Winding Straight Connector for 6600 V Cross-Linked Polyethylene Insulated Power Cable" (JCAA F 4201-3) Japan Electric Power Cable Connection Technology Association, Technical Review "For full use of power cable connections (Construction/Construction Part 3)"

By the way, when connecting a conductor of an electric wire/cable to a terminal or a connection tube part of a conductor connection tube, as described above, the specified position of the connection tube part into which the conductor is inserted is crimped or compressed by crimping with dies. It is necessary to However, in the current situation, workers in the field caulk a predetermined position of the connecting tube portion with dies based on their own experience and intuition, so the position actually crimped with the dies may deviate from the predetermined position.

If the crimped position deviates from the predetermined position and the range of electrical and mechanical contact between the conductor and the connection tube becomes narrower than when the predetermined position is crimped, the conductor may become a terminal or a terminal during use. During use (i.e., while the power is on), it may come off from the conductor connection tube, the specified performance may not be obtained at the terminal or conductor connection tube, or the contact resistance between the conductor and the terminal or conductor connection tube may increase. May lead to fever.

Also, for example, when the conductor of an electric wire/cable is connected to a terminal or a conductor connection tube by crimping, if the position to be crimped with the dies deviates from the predetermined position, the connecting tube portion may be pushed by the pushing portion of the push-in side dies. Shearing may occur in the connecting tube and the connecting tube may crack.

Furthermore, for example, when a conductor of an electric wire, an electric wire, or a cable is connected to a terminal or a conductor connecting tube due to compression, a problem may occur when the position to be crimped with the dies deviates from a predetermined position. That is, for example, in the case of hexagonal compression, the terminal is 1/3 overlapped from the battledore side toward the electric wire/cable side, and the conductor connection tube is similarly compressed 1/3 overlap from the center to the left and right alternately. When the next compression is performed, if the layers are compressed with an interval without being overlapped by 1/3 by mistake, the predetermined contact resistance may not be obtained. Moreover, burrs are formed on the surface of the conductor connection tube after compression, which may damage the semiconducting layer and the insulating layer formed thereon, and may even cause dielectric breakdown from the burrs.

The present invention has been made in view of the above problems. It is an object of the present invention to provide a connection tube, a terminal , a crimping die, a connection structure, and a connection method, which can appropriately and easily align the die and the connection tube.

In order to solve the above-mentioned problem, the invention according to claim 1 provides a connecting tube portion that is connected to the conductor by being crimped together with the conductor of the inserted electric wire/cable,
In the crimping die, the surface of the connecting tube portion is engaged with a protrusion or a recess provided on the inner wall surface of the crimping die for crimping the connecting tube portion into which the conductor is inserted . A concave portion or a convex portion for axial positioning of the connecting tube portion is provided ,
The concave portion or convex portion provided on the surface of the connecting tube portion is preferably provided at a position avoiding a position where it is pushed by the pushing portion of the crimping die .

The invention according to claim 2 is the connection tube part according to claim 1,
The protrusions or recesses provided on the inner wall surface of the crimping die and the recesses or protrusions provided on the surface of the connecting cylinder are formed in a point shape, an oval shape, or a belt shape. do.

The invention according to claim 3 is the connection cylinder part according to claim 1 or claim 2,
A plurality of recesses or protrusions are provided on the surface of the connecting tube,
The plurality of concave portions or convex portions correspond to an extension of the trajectory drawn by the center of the pressing-side die of the crimping dies when the center of the pressing-side die of the crimping dies moves when crimping the connecting tube portion with the dies for crimping. It is characterized in that they are provided at point-symmetrical positions with respect to the point of intersection with the surface.

The invention according to claim 10 is a construction method for connecting the connection tube portion and the conductor,
Regarding the connection cylinder part according to any one of claims 1 to 3,
Among the sizes of the conductors of the electric wire/cable, the other connecting tube portion connected to at least the adjacent conductor of the size refers to the size, shape, position, It is characterized in that at least one of the numbers is made different from each other so that the connection tube portion and the die are matched to connect the connection tube portion and the conductor .

The invention according to claim 4 , in the terminal,
It is characterized by comprising the connection tube portion according to any one of claims 1 to 3 .

The invention according to claim 5 is a crimping die that connects the conductor and the connection tube portion by crimping the connection tube portion together with the conductor of the inserted electric wire/cable,
The connection within the crimping die is provided on the inner wall surface of the crimping die at a position that avoids a position where the surface of the connecting tube portion is pushed by the pushing portion of the crimping die. It is characterized in that a convex portion or a concave portion that engages with a concave portion or a convex portion for axial positioning of the cylindrical portion is provided.

The invention according to claim 6 is the crimping die according to claim 5 ,
An angle formed by a normal vector at an arbitrary point on the surface of the convex portion or concave portion provided on the inner wall surface of the crimping die and the removing direction of the connecting tube portion is 90° or less. .

The invention according to claim 11 is a construction method for connecting the connection tube portion and the conductor,
Regarding the crimping die according to claim 5 or claim 6 ,
Among the crimping dies, the other crimping dies used for connecting at least the conductors of adjacent sizes and the connecting cylinder part have the size of the protrusion or recess provided on the inner wall surface thereof, At least one of shape, position, and number is made different from each other to match the connection tube portion and the die to connect the connection tube portion and the conductor .

According to a seventh aspect of the present invention, there is provided a connection tube portion connected to the conductor by being crimped together with the conductor of the inserted electric wire/cable, and a crimping die for crimping the connection tube portion into which the conductor is inserted. in
A concave portion for positioning the connecting tubular portion in the crimping die in the axial direction, which engages with a convex portion or a concave portion provided on the inner wall surface of the crimping die, on the surface of the connecting tubular portion. Or a convex part is provided,
The inner wall surface of the crimping die is provided with the convex portion or concave portion that engages with the concave portion or convex portion provided on the surface of the connecting tube portion,
The concave portion or convex portion provided on the surface of the connecting tube portion is preferably provided at a position avoiding a position where it is pushed by the pushing portion of the crimping die.

The invention according to claim 8 is a connection structure for connecting a conductor of an electric wire/cable and a terminal,
The surface of the connection tube portion of the terminal engages with a convex portion or a recess provided on the inner wall surface of a crimping die for crimping the connection tube portion. A concave portion or convex portion for axial positioning is formed,
The concave portion or convex portion provided on the surface of the connecting tube portion is crimped by the pressing portion of the crimping die when the connecting tube portion is crimped together with the conductor of the wire/cable inserted therein. It is characterized in that it is provided at a position avoiding the pushed position.

The invention according to claim 9 is a construction method for connecting a connection tube portion and a conductor of an electric wire/cable using a crimping die,
The connecting cylinder is provided with a concave portion or a convex portion for positioning the connecting cylinder portion in the axial direction in the crimping die at a position on the surface thereof, which avoids the position where the pressing portion of the crimping die pushes in. inserting the conductor into the part,
The connecting tube portion is attached to the crimping die having a convex portion or a concave portion on the inner wall surface thereof, and the concave portion or convex portion of the connecting cylindrical portion is engaged with the convex portion or concave portion of the crimping die. set it so that
The connection cylinder portion and the conductor are connected by crimping the connection cylinder portion together with the inserted conductor with the crimping dies.

According to the present invention, when connecting the connecting tubular portion into which the conductor of the electric wire/cable is inserted by caulking with a die, the concave portion provided on the connecting tubular portion is engaged with the convex portion provided on the die. As a result, it is possible to appropriately and easily align the die and the connecting tube portion, and it is possible to appropriately caulk the connecting tube portion at a predetermined position with the die.

(A) is a perspective view showing a terminal having a connecting tube portion according to the first embodiment; (B) is a perspective view showing a receiving-side die that constitutes the die according to the first embodiment; (A) is a perspective view showing a state in which a terminal is set in a die, and (B) is a cross-sectional view. (A) is a diagram showing an example in which the connecting cylinder is set in an incorrect position with respect to the receiving die, and (B) is a diagram showing that the root portion of the connecting cylinder is destroyed. (A) It is a figure showing the state where the connection cylinder part was set to the correct position with respect to the receiving side die, (B) It is a figure showing that the connection cylinder part is crimped appropriately. (A) is a perspective view showing a conductor connection tube having a connection tube portion according to a second embodiment; (B) is a perspective view showing a receiving-side die that constitutes the die according to the second embodiment; FIG. 4 is a perspective view showing a state in which a conductor connecting tube is set in a die; It is a figure explaining that overlapping margin becomes 1/3 of die width automatically when hexagonal compression is performed according to the procedure in the second embodiment. FIG. 10 is a diagram showing a state in which the concave portion of the connecting tube portion is provided at a position that avoids the position where the pressing portion of the pressing die of the pressing die is pressed. FIG. 10 is a diagram showing an example of a connection structure in which a concave portion of a connecting tube portion is provided at a position that avoids a position where the recessed portion of the connecting tube portion is pushed by the pushing portion of the pushing-in side of the die for crimping. FIG. 10 is a diagram showing an example of a connecting tube portion in which a plurality of concave portions are provided at point-symmetrical positions about the intersection of the moving direction of the center of the pushing portion of the pushing-side die and the surface. It is a figure showing the state which set the connection cylinder part which inserted the conductor of an electric wire/cable from (A) one side, (B) from the other side in the receiving side die. FIG. 11 is a plan view showing a receiving-side die having projections provided at a plurality of positions corresponding to the plurality of recesses of the connecting tube portion of FIG. 10; (A) is a diagram showing an example of a connecting tube portion formed in a shape that does not narrow the lower side of the recess, and (B) is a diagram showing a state in which the recess of the connecting tube portion is deformed following the convex portion of the receiving die. It is a diagram. (A) is a diagram showing another example of the convex portion provided on the receiving die, and (B) is a diagram showing a state in which the concave portion of the connecting tube portion is deformed following the convex portion of the receiving die. (A) It is a figure showing the example of the recessed part provided in the receiving side die|dye, (B) It is a figure showing the state which a connection cylinder part deform|transforms following the recessed part of a receiving side die|dye. It is a figure showing the case where the direction which removes the connection cylinder part crimped in the case of FIG.14(B) is changed. (A) and (B) are diagrams showing an example of the shape of a convex portion that allows the crimped connecting tube portion to be removed without being caught by the convex portion of the receiving die. (A) is a diagram showing a state in which the concave portion of the connecting tube portion and the convex portion of the receiving die are pseudo-engaged, and (B) the concave portion and the convex portion are engaged when the size and shape of the convex portion are changed. It is a figure showing disappearing. It is a figure showing the state which the recessed part of a connection cylinder part and the convex part of the receiving side die|dye are engaged in the state which rattles. It is a figure showing the example which changed the shape of (A) the recessed part of a connection cylinder part, and (B) the convex part of the receiving side die. (A) It is a figure showing another example which changed the shape of the recessed part of a connection cylinder part, and (B) the convex part of the receiving side die|dye. (A) It is a figure showing the example which changed the position of the recessed part of a connection cylinder part, and (B) the convex part of a receiving side die|dye. It is a figure showing another example which changed the position of the recessed part of the connection cylinder part. It is a figure showing the example which changed the number of the convex parts of the receiving side dice. (A) is a perspective view showing a configuration example A of a receiving die, and (B) is a cross-sectional view taken along line BB. 10A to 10C are perspective views showing configurations in which the number and positions of the projections are changed in configuration example A of the receiving die. FIG. FIG. 11 is a perspective view showing a configuration example B of a receiving die; (A) is a perspective view showing a configuration example C of a receiving die, (B) is a cross-sectional view along line CC, and (C) is an enlarged view. (A) is a perspective view showing a receiving die when the cross-sectional shape of the band-shaped convex portion is trapezoidal, and (B) is a cross-sectional view taken along line DD. FIG. 20 is a perspective view showing a configuration example D of a receiving die in the sixth embodiment; FIG. 30 is a cross-sectional view taken along line AA of FIG. 29, showing the arrangement relationship between the dice and the set connecting cylinder. 8A and 8B are perspective views showing modifications in which strip-shaped protrusions are intermittently formed in configuration example D of the receiving die. FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, several embodiments of a connection tube portion, a terminal , a crimping die, and a connection structure according to the present invention will be described with reference to the drawings. However, although various technically preferable limitations are attached to the embodiments described below to carry out the present invention, the scope of the present invention is not limited to the following embodiments and illustrated examples. Absent.

In the present invention, the conductor of the electric wire/cable is inserted into the connecting tubular portion of the terminal or the conductor connecting tube, and the connecting tubular portion is crimped (crimped or compressed) with the dies together with the inserted electric wire/cable conductor. , the conductor of the electric wire/cable and the terminal are electrically and mechanically connected.
In this case, the surface of the connecting tube portion of the terminal or the conductor connecting tube is provided with a concave portion or a convex portion that engages with a convex portion or a concave portion provided on the inner wall surface of the die for caulking the connecting tube portion. .
Further, the inner wall surface of the die is provided with a protrusion or recess that engages with the recess or protrusion provided on the surface of the connecting tube.

In the following, a case will be described where the conductor of an electric wire/cable is connected to a terminal by crimping, and the conductor and a conductor connecting tube are connected by compression. Needless to say, the connecting pipe may be connected by crimping. Although the latter case will not be described below, it can be explained in the same manner as the former case, and the present invention also includes the latter case.

In the following description, a case in which a concave portion is provided on the surface of the connecting tube portion and a convex portion is provided on the inner wall surface of the die will be described. A convex portion may be provided on the surface of the cylindrical portion, and a concave portion may be provided on the inner wall surface of the die.

[First embodiment]
In this embodiment, the most basic configuration of the present invention will be explained by exemplifying the case where the conductor 51 of the electric wire/cable 50 and the connection tube portion 10 of the terminal 20 are connected by crimping with the die 40 .
FIG. 1A is a perspective view showing a terminal 20 having a connecting tube portion 10 according to this embodiment, FIG. 1B is a perspective view showing a receiving die 42 constituting a die 40 according to this embodiment, and FIG. A) and (B) are a perspective view and a cross-sectional view showing a state in which the terminal 20 is set in the die 40. FIG. Note that the electric wire/cable 50 and the conductor 51 are omitted in FIG. 2(A). 3(A) and 3(B), which will be described later, the wire/cable 50 and the conductor 51 may be omitted. It goes without saying that this is done in a state in which the conductor 11 is inserted.

As shown in FIG. 1A, the terminal 20 mainly includes a battledore portion 21 having a hole 22 and a substantially cylindrical connecting tube portion 10 having a hollow inside, A conductor 51 (see FIG. 2B) of an electric wire/cable 50 can be inserted into the connecting tube portion 10 through the opening 10B.
Further, in the present embodiment, the surface 10A of the connecting tube portion 10 of the terminal 20 is provided with the concave portion 11 at a predetermined position.

In this embodiment, the die 40 is a die for crimping, and as shown in FIG. Note that the die 40 is not limited to being composed of two parts, the pressing-side die 41 and the receiving-side die 42, and may be composed of three or more parts.

A push-in side die 41 of the die 40 is provided with a push-in portion 41A (also referred to as a convex portion or the like) for crimping the connection tube portion 10 of the terminal 20 .
Further, in the present embodiment, as shown in FIGS. 1B and 2A, the inner wall surface 42A of the receiving die 42 is provided at a predetermined position, and the surface 10A of the connection tube portion 10 of the terminal 20 is provided with a A point-like convex portion 43 having substantially the same shape as the provided concave portion 11 and having an opposite unevenness is provided.

With this configuration, as shown in FIG. 2(B), when the connecting tube portion 10 of the terminal 20 into which the conductor 51 of the electric wire/cable 50 is inserted is set to the receiving die 42 for crimping, the connection is performed. The concave portion 11 of the cylindrical portion 10 and the convex portion 43 of the receiving die 42 are engaged. Note that the conductor 51 of the electric wire/cable 50 may be inserted into the connecting tube portion 10 after setting the connecting tube portion 10 of the terminal 20 to the receiving die 42 (hereinafter the same).

Then, as described above, when the concave portion 11 of the connecting tube portion 10 and the convex portion 43 of the receiving die 42 are engaged with each other, the connecting tube portion 10 is axially inserted into the connecting tube portion 10 in the die 40. The extension direction of the conductor 51 of the electric wire/cable 50 (see the arrow in the figure) does not move.
Therefore, in the present embodiment, when the connecting tube portion 10 of the terminal 20 is set on the receiving side die 42 of the die 40, the concave portion 11 of the connecting tube portion 10 and the convex portion 43 of the receiving side die 42 are engaged. Thus, the connecting tube portion 10 is easily and appropriately positioned with respect to the die 40 (receiving side die 42).

At that time, by providing the concave portion 11 at an appropriate position on the surface 10A of the connecting tube portion 10 and providing the convex portion 43 at an appropriate position on the inner wall surface 42A of the receiving die 42, the connecting tube portion 10 is To accurately prevent the position crimped by a pressing part 41A of a pressing side die 41 from deviating from a predetermined position when crimping a conductor 51 of an electric wire/cable 50 and a connecting tube part 10 by crimping. becomes possible.

A specific description will be given below. Suppose now that the connecting tube portion 10 and the die 40 are not provided with the concave portion 11 and the convex portion 43 as in the present embodiment, and the connecting tube portion 10 can move in the die 40 in the axial direction of the connecting tube portion 10. Suppose it is

When ^crimping the connecting tube portion 10 with the die 40 in such a state, for example, as shown in FIG. There is a case where the connecting tube portion 10 is set at a position where the center Cd of the portion 41A hits.
Then, when the pushing-in side die 41 is moved in this state and the pushing-in portion 41A is pushed into the connecting tube portion 10, a shearing force is applied to the base portion α of the connecting tube portion 10 as shown in FIG. 3(B). , the connecting tube portion 10 may be destroyed at the portion α.

Also, although illustration is omitted, for example, the pressing portion 41A of the pressing-side die 41 is positioned closer to the opening portion 10B side of the connecting tube portion 10 than the position shown in FIG. ), the conductor 51 of the electric wire/cable 50 may come off from the terminal 20 or the connection failure between the terminal 20 (connection tube 10) and the conductor 51 may occur. may be lost.

On the other hand, when configured as in this embodiment, as shown in FIG. 43 are engaged and positioned, and the connecting tube portion 10 does not move in the axial direction within the die 40 .
Then, when the pushing portion 41A of the pushing-side die 41 is pushed into the connecting tube portion 10 in this state, the center Cd of the pushing-in portion 41A of the pushing-side die 41 appropriately contacts the correct position C on the surface 10A of the connecting tube portion 10. become. By further pushing in, it becomes possible to properly caulk the connecting tubular portion 10 as shown in FIG. 51 can be properly connected.

Note that _C10 in FIGS. 4A and 4B will be described later. In addition, the “predetermined position” of the surface 10A of the connecting tube portion 10 on which the concave portion 11 is provided and the “predetermined position” of the inner wall surface 42A of the receiving die 42 on which the convex portion 43 is provided are connected as described above. When the pushing portion 41A of the pushing-side die 41 is pushed into the connecting tubular portion 10 in a state where the concave portion 11 of the tubular portion 10 and the convex portion 43 of the receiving-side die 42 are engaged and positioned, the pushing-in portion of the pushing-side die 41 is pushed. The position is such that the connecting tube portion 10 can be crimped while the center Cd of 41A is in contact with the correct position C on the surface 10A of the connecting tube portion 10 .

In the present embodiment, as described above, when the connection tube portion 10 into which the conductor 51 of the electric wire/cable 50 is inserted is crimped with the dies 40 and connected by crimping, the connection tube portion 10 is connected by the receiving side die 42 of the die 40 . When set up, the concave portion 11 of the connecting tube portion 10 and the convex portion 43 of the receiving side die 42 engage with each other, and the connecting tube portion 10 is easily and appropriately positioned with respect to the die 40 (receiving side die 42). . Therefore, in this state, by pressing the push-in side die 41 and crimping the connection tube portion 10 , it is possible to appropriately crimp the connection tube portion 10 at a predetermined position with the die 40 .

When connecting the conductor 51 of the electric wire/cable 50 and the connection tube portion 10 of the terminal 20 by crimping with the die 40, the worker at the site can perform the recess of the connection tube portion 10 without relying on his/her own experience and intuition. 11 and the convex portion 43 of the receiving die 42 are engaged with each other to set the connecting tube portion 10 on the receiving die 42, so that the connecting tube portion 10 can be crimped in an appropriately positioned state. Become. Therefore, the worker can easily and appropriately perform the crimping work.

[Regarding the engagement between the concave part and the convex part]
In the following embodiments, the recessed portion 11 of the connecting tube portion 10 and the convex portion 43 of the receiving-side die 42 are engaged with each other as described above, so that the connecting tube portion 10 is positioned with respect to the die 40, thereby allowing the proper position of the connecting tube portion 10 to be crimped.
Therefore, it is desirable that the concave portion 11 and the convex portion 43 are engaged in a state in which they do not move relative to each other. That is, when they are engaged, it is desirable that they are engaged in a state in which the convex portion 43 of the receiving die 42 does not move around within the concave portion 11 of the connecting tube portion 10 . However, as shown in FIG. 15(A), which will be described later (in this figure, the convex portion 12 of the connecting tube portion 10 and the concave portion 44 of the receiving side die 42 are engaged), the concave portion 11 and the convex portion 43 do not necessarily have to fit (that is, engage without a gap).

[Second embodiment]
In the above-described first embodiment, the case of connecting the conductor 51 of the electric wire/cable 50 and the connecting tube portion 10 by crimping with the die 40 (crimping die) has been described. However, the present invention can also be applied to the case of connecting the conductor 51 of the electric wire/cable 50 and the connecting tube portion 10 by compression with a die 40 (a die for compression), similarly to the first embodiment. It is configurable.
Hereinafter, a case in which the conductor 51 of the wire/cable 50 and the connecting tube portion 10 of the conductor connection tube 30 are connected by compression with a die 40 (a die for compression) to extend the wire/cable 50 will be exemplified. to explain.

FIG. 5A is a perspective view showing a conductor connection tube 30 having a connection tube portion 10 according to this embodiment, and FIG. 6 is a perspective view showing a state in which the conductor connecting tube 30 is set in the die 40. FIG. 5(B) and 6 show a die used for hexagonally compressing the connecting tubular portion 10 as the die 40. As shown in FIG.

As shown in FIG. 5(A), the conductor connecting tube 30 is composed of a substantially cylindrical connecting tube portion 10, and conductors 51 ( 6) can be inserted respectively.
In this embodiment, a groove-shaped concave portion 11 extending in a direction orthogonal to the axial direction of the connecting tube portion 10 is provided at a predetermined position on the surface 10A of the connecting tube portion 10 of the conductor connecting tube 30. .

As shown in FIG. 6, the die 40 comprises a compression die 41 and a receiving die 42. Also in this embodiment, the die 40 is composed of two parts, the compression die 41 and the receiving die 42. It is not limited to the case of being configured with, and may be configured with three or more parts.
In the present embodiment, as shown in FIGS. 5B and 6, the inner wall surface 42A of the receiving die 42 is provided with projections 43 at predetermined positions.

5A, 5B, and 6, recessed portions 11 are provided on both sides of the surface 10A of the connecting tube portion 10 (that is, positions symmetrical with respect to the central axis of the connecting tube portion 10). , the case is shown in which the convex portions 43 are provided on both sides of the inner wall surface 42A of the receiving die 42, respectively, but the present invention is not limited to this, and for example, the connecting tube portion 10 The concave portion 11 and the convex portion 43 may be provided on one side of the surface 10A and on one side of the inner wall surface 42A of the receiving die 42 .
Further, in this way, it is not necessary to provide the projection 43 of the receiving die 42 at the bottom of the inner wall surface 42A as shown in FIGS. Instead, as shown in FIGS. 5(A) and 5(B), it is also possible to configure so as to be provided at a position other than the bottom of the inner wall surface 42A.

With the above configuration, as shown in FIG. 6, when the connecting tube portion 10 of the conductor connecting tube 30 into which the conductor 51 of the electric wire/cable 50 is inserted is set in the receiving die 42 for compression, the connection is performed. The concave portion 11 of the cylindrical portion 10 and the convex portion 43 of the receiving die 42 are engaged with each other, and the connecting cylindrical portion 10 does not move in the die 40 in the axial direction.
Therefore, also in the present embodiment, when setting the connecting tube portion 10 of the conductor connecting tube 30 on the receiving side die 42 of the die 40, the concave portion 11 of the connecting tube portion 10 and the convex portion 43 of the receiving side die 42 are aligned. By engaging them, the connection tube portion 10 is easily and appropriately positioned with respect to the die 40 (receiving side die 42).

Then, when performing compression (hexagonal compression), first, as shown in FIG. The concave portion 11 of 10 and the convex portion 43 of the receiving die 42 are engaged and positioned, and the connection tube portion 10 is set to the receiving die 42 . Then, the compression die 41 is moved toward the connecting tube portion 10 and the receiving die 42 to compress.
Subsequently, in the example shown in FIG. 6, for example, the connecting tube portion 10 is moved obliquely upward to the left in the drawing to engage the concave portion 11 of the connecting tube portion 10 with the convex portion 43 of the receiving die 42. set and compress.

Next, the connecting tube portion 10 is moved from the state shown in FIG. 6 obliquely downward to the right in the figure to engage the concave portion 11 of the connecting tube portion 10 with the convex portion 43 of the receiving side die 42. set and compress.
If necessary, compression (hexagonal compression) is performed by repeating the operation alternately to the left and right.

In the present embodiment, as described above, when the connection tube portion 10 into which the conductor 51 of the electric wire/cable 50 is inserted is crimped with the dies 40 and connected by compression, the connection tube portion 10 is pressed by the receiving side die 42 of the die 40 . When set up, the concave portion 11 of the connecting tube portion 10 and the convex portion 43 of the receiving side die 42 engage with each other, and the connecting tube portion 10 is easily and appropriately positioned with respect to the die 40 (receiving side die 42). . Therefore, in this state, by compressing and crimping the connection tube portion 10 with the compression dies 41 , the connection tube portion 10 can be appropriately crimped (compressed) with the dies 40 .

When connecting the conductor 51 of the electric wire/cable 50 and the connection tube portion 10 of the conductor connection tube 30 by compression with the die 40, the worker at the site can easily perform the connection tube portion 10 without relying on his/her own experience and intuition. Compression can be performed in a state in which the connecting tubular portion 10 is properly positioned only by engaging the concave portion 11 and the convex portion 43 of the receiving side die 42 and setting the connecting tubular portion 10 on the receiving side die 42. It becomes possible.
Therefore, the worker can easily and appropriately perform the compression work.

As described above, when hexagonal compression is performed, first, the central portion of the conductor connection tube 30 (connection cylinder portion 10) into which the conductor 51 of the electric wire/cable 50 is inserted from both ends is compressed, and then 1/ The work procedure is determined so that the left and right sides are alternately compressed in three layers.
Therefore, the projections 43 provided on the inner wall surface 42A of the receiving die 42 extend from both ends of the receiving die 42 by half the length d of the overlap D (that is, 1/3 of the width of the die) during crimping. (i.e., 1/6 of the die width) are preferably provided at respective inner positions.

With this configuration, as shown in FIG. 7, the concave portion 11 of the connection tube portion 10 and the receiving side die 42 are aligned so that the central portion of the connecting tube portion 10 of the conductor connecting tube 30 is positioned above the receiving side die 42 . After engaging with the projection 43, positioning and setting (see the upper part of the figure) and compressing, for example, the receiving die 42 is moved to the right in the figure (or the connecting cylinder part 10 is moved to the left). ) When the concave portion 11 of the connecting tube portion 10 and the convex portion 43 of the receiving die 42 are engaged (see the middle part of the figure), the overlap D at the time of crimping automatically becomes 1/3 of the die width.

Further, after compressing in this state, the receiving die 42 is moved to the left in the figure (or the connecting tube portion 10 is moved to the right) to form the concave portion 11 of the connecting tube portion 10 and the convex portion 43 of the receiving side die 42 . (see the lower part of the figure), the overlap D at the time of crimping automatically becomes 1/3 of the width of the die.
That is, with the above configuration, it is only necessary to relatively move the connecting tube portion 10 and the receiving side die 42 so that the concave portion 11 of the connecting tube portion 10 and the convex portion 43 of the receiving side die 42 are engaged with each other. , 1/3 overlap can be automatically realized.

Therefore, a worker on site can connect the conductor 51 of the electric wire/cable 50 and the connecting tube portion 10 of the conductor connecting tube 30 by appropriately compressing the predetermined ⅓ overlap without relying on his/her own experience and intuition. It becomes possible to Moreover, it becomes possible to do it easily.
In addition, since the conductor 51 of the electric wire/cable 50 and the connection cylinder portion 10 of the conductor connection tube 30 are appropriately connected in this way, a predetermined contact resistance cannot be obtained, and the surface of the conductor connection tube 30 after compression may not be obtained. It is possible to prevent problems such as the formation of burrs on the surface.

[Third embodiment]
Next, as a third embodiment, the number of concave portions 11 provided on the surface 10A of the connection tube portion 10 of the terminal 20 described in the first embodiment and the convex portions 43 provided on the inner wall surface 42A of the receiving die 42 are determined. Other examples, such as the number of , will be described based on FIG. 8 and subsequent drawings.

In FIG. 2B and the like, the case where the conductor 51 of the electric wire/cable 50 is inserted from the right side in the figure into the connection tubular portion 10 of the terminal 20 and connected by crimping has been described. However, depending on the site, it may be necessary to reverse the direction of the terminal 20 and connect the electric wire/cable 50 coming from the left side.
At that time, for example, in the configuration shown in FIG. When the concave portion 11 and the convex portion 43 are engaged with each other in a state in which it is inserted from the middle left side, the opening portion 10B side of the connecting tube portion 10 is only slightly placed on the receiving side die 42 (not shown). As a result, the connection tube portion 10 cannot be set at an appropriate position on the receiving die 42 .

Therefore, when using the terminal 20 and the die 40 configured as shown in FIG. It is necessary to change the orientation of the dice 40 by changing the orientation (for example, by changing the orientation from the forward orientation to the rearward orientation), which is time-consuming.
Therefore, in the case of the configuration shown in FIG. The line connecting the center Cd of the pushing portion 41A of the pushing side die 41 and the position C (see the one-dot chain line in the figure) is further extended downward at a position C ₁₀ (so-called central position). Conceivable. With this configuration, it is not necessary to change the orientation of the die 40 even if the orientation of the wire/cable 50 (that is, the orientation of the terminal 20) changes.

However, if the concave portion 11 and the convex portion 43 are provided at the central position C10 of the connecting tube portion ₁₀ and the receiving die 42, the compression ratio at that portion is lowered.
Therefore, a design, a new configuration, or the like is required to compensate for this. Therefore, it is desirable to provide the concave portion 11 and the convex portion 43 at positions that do not affect caulking as much as possible (in particular, positions that do not affect the compressibility in caulking).
That is, as shown in FIG. 8, the concave portion 11 provided on the surface 10A of the connecting tube portion 10 is provided at a position avoiding the position R where the pressing portion 41A of the pressing side die 41 of the pressing die 40 for crimping presses. It is desirable that

In the case of such a configuration, as shown in FIG. A recessed portion 11 is formed on the surface 10A of the portion 10, and when the recessed portion 11 is crimped together with the conductor 51 of the wire/cable 50 into which the connection tubular portion 10 is inserted, the crimping die 40 is pressed. It is provided at a position avoiding the position R pushed by the pushing portion 41A of the pushing-in side die 41. As shown in FIG.
9 is a view of the electric wire/cable 50 in which the terminal 20 is connected to the conductor 51, viewed from directly above the terminal 20. FIG.

Hereinafter, an example will be described in which the recess 11 and the projection 43 are engaged even when the orientation of the terminal 20 or the connecting tube portion 10 is changed without changing the orientation of the die 40 .

[Third Embodiment - Part 1]
In this case, for example, as shown in FIG. 10, a plurality of concave portions 11 are provided on the surface 10A of the connecting tube portion 10, and the plurality of concave portions 11 are positioned at the center Cd (FIG. 4A) of the pushing portion 41A of the pushing side die 41. , (B)) and the intersection C10 of the surface _10A .
The number of recesses 11 need not be two as shown in FIG. 10, and may be three or more. However, the plurality of recesses ₁₁ positioned symmetrically with respect to the intersection C10 are provided so as to have the same size and symmetrical shape.

With this configuration, as shown in FIG. 11(A), when setting the connection tube portion 10 in a state in which the conductor 51 of the electric wire/cable 50 is inserted from the right side in the drawing to the receiving die 42, a plurality of One of the concave portions 11 (in this case, the concave portion 11 on the opening side of the connecting tube portion 10 ) engages with the convex portion 43 provided on the receiving die 42 . Further, as shown in FIG. 11(B), when setting the connection tube portion 10 in a state in which the conductor 51 of the electric wire/cable 50 is inserted from the left side in the figure to the receiving die 42, The concave portion 11 on the opposite side (in this case, the concave portion 11 on the root side of the connecting tube portion 10) engages with the convex portion 43 provided on the receiving die 42. As shown in FIG.

Since both recesses 11 are provided at positions symmetrical about the position of the center Cd of the pressing portion 41A of the pressing-side die 41 (that is, the point C ₁₀ described above), the connection tube portion 10 is arranged as shown in FIG. In either state (A) or (B), the connection tube portion 10 can be appropriately crimped (crimped) by the pressing portion 41A of the pressing-side die 41 .
Thus, by configuring the connecting tube portion 10 as shown in FIG. 10, even if the direction of the electric wire/cable 50 changes, the connecting tube portion 10 and the die 40 can be connected to the die 40 without changing the direction of the die 40. By simply changing the orientation of the terminal 20 , it is possible to appropriately crimp the connection tube portion 10 with the dies 40 and appropriately connect the terminal 20 to the conductor 51 of the electric wire/cable 50 .

[Third Embodiment - Part 2]
Further, in the above example, only the concave portions 11 of the connecting tube portion 10 are provided in a plurality, but it is also possible to provide a plurality of convex portions 43 in the receiving die 42 of the die 40 as well.
In this case, as shown in FIG. 12, a plurality of protrusions 43 are provided at respective positions of the inner wall surface 42A of the receiving die 42 corresponding to the plurality of recesses 11 provided in the connecting tube portion 10. .

With this configuration, as in the above example, even if the orientation of the connecting tube portion 10 set on the die 40 is changed, the plurality of concave portions 11 of the connecting tube portion 10 and the plurality of convex portions 43 of the receiving side die 42 can be easily adjusted. are engaged with each other, the connection tube portion 10 can be positioned at an appropriate position with respect to the receiving die 42 even if the orientation of the connection tube portion 10 is changed.
Therefore, even if the direction of the electric wire/cable 50 is changed, the connection tube portion 10 can be appropriately adjusted by the die 40 by simply changing the direction of the connection tube portion 10 and the terminal 20 with respect to the die 40 without changing the direction of the die 40 . It is possible to appropriately connect the terminal 20 to the conductor 51 of the electric wire/cable 50 by crimping.

[Fourth embodiment]
Next, as a fourth embodiment, another example of the shape of the convex portion 43 provided on the inner wall surface 42A of the receiving die 42 will be described with reference to FIGS. .
13A, 13B, etc., for the sake of clarity, the concave portion 11 of the connecting tube portion 10 and the convex portion 43 of the receiving side die 42 are shown in actual proportions to the connecting tube portion 10. is relatively larger than 13A, 13B, etc., illustration of the wire/cable 50, the conductor 51, and the hollow inside the connecting tube portion 10 is also omitted.
In the following, a case of crimping the connection tube portion 10 of the terminal 20 with a crimping die 40 to connect the conductor 51 of the electric wire/cable 50 and the connection tube portion 10 by crimping will be described. Descriptions of connecting the connection tube portion 10 by compression and connecting the conductor 51 and the connection tube portion 10 of the conductor connection tube 30 by crimping or compression will be omitted, but these cases will also be described in the same way. The same applies to the fifth embodiment described later.

In the first to third embodiments, when the projections 43 provided on the receiving die 42 are hemispherical (in the receiving die 42 of the compression die 40 shown in FIG. However, the protrusions 43 may be cylindrical, conical, prismatic, pyramidal, star-shaped, wave-shaped, or any other shape.

However, at that time, if the convex portion 43 of the receiving die 42 has a shape that is narrowed at the lower side as shown in FIG. , the concave portion 11 of the connecting tube portion 10 deforms following the convex portion 43 of the receiving die 42 when the connecting tube portion 10 is caulked with the die 40 even if the lower side in the drawing is formed into a shape that does not narrow. , as shown in FIG. 13(B), it may enter the narrowed portion below the convex portion 43 of the receiving die 42 (see the arrow in the figure).
Therefore, when the caulked connecting tube portion 10 is removed from the receiving die 42, the deformed concave portion 11 bites into and gets caught in the convex portion 43 of the receiving die 42, making it difficult or impossible to remove the connecting tube portion 10. obtain.

Further, even if the convex portion 43 of the receiving die 42 is hemispherical, for example, if the convex portion 43 of the receiving die 42 is provided at a position as shown in FIG. When the connecting tube portion 10 is crimped, the concave portion 11 of the connecting tube portion 10 is deformed following the convex portion 43 of the receiving die 42, and as shown in FIG. It may enter the lower side (see the arrow in the figure).
Therefore, in this case as well, when the connection tube portion 10 is removed from the receiving die 42 after crimping or compression is completed, the deformed concave portion 11 bites into and is caught by the convex portion 43 of the receiving die 42 , and the connecting tube portion 10 is removed. It may become difficult or impossible to remove.

Furthermore, the above phenomenon can occur in the same way when the concave portion 44 is provided on the inner wall surface 42A of the receiving die 42 (in this case, the convex portion 12 is provided on the surface 10A of the connecting tube portion 10). That is, for example, as shown in FIG. 15(A), when the inner wall surface 42A of the receiving die 42 is provided with a concave portion 44 narrowed at the upper side in the drawing, when the connecting tube portion 10 is crimped with the die 40, the connecting tube portion 10 may deform following the recess 44 of the receiving die 42 and enter the recess 44 of the receiving die 42 as shown in FIG. 15(B) (see the arrow in the figure).
Therefore, also in this case, when the connecting tube portion 10 is removed from the receiving die 42 after crimping or compression is completed, the convex portion 12 of the connecting tube portion 10 deformed so as to fill the recess 44 of the receiving die 42 is removed. bites into the concave portion 44 of the receiving die 42 and gets caught, making it difficult or impossible to remove the connecting tube portion 10 .

In the example shown in FIGS. 14A and 14B, when removing the connecting tube portion 10 from the state of FIG. 14B, as shown in FIG. (see the arrow in the drawing), the deformed concave portion 11 of the connecting tube portion 10 can be removed without being caught by the convex portion 43 of the receiving die 42, and thus the connecting tube portion 10 can be removed as described above. It is possible to solve the problem of the deformation of the connecting tube portion 10 being caught by the concave portion 11 .
However, in order to do so, the connection tube portion 10 cannot be removed unless the portion of the receiving die 42 indicated by β in the drawing is removed in advance. It is difficult to say that it is a realistic countermeasure because there is a risk that it will not function as a die, such as being unable to crimp properly.

Therefore, the projection 43 (or recess 44; the same shall apply hereinafter) provided on the inner wall surface 42A of the receiving die 42 is used when the connecting tube 10 crimped by the die 40 is removed from the receiving die 42. It is desirable that the concave portion 11 (or the convex portion 12 , hereinafter the same) of 10 is formed in a shape that can be smoothly removed from the receiving die 42 without being caught by the convex portion 43 of the receiving die 42 .
In the above-described second embodiment, the reason why the concave portion 11 of the connecting tube portion 10 is provided in the shape of a groove extending in the direction orthogonal to the axial direction of the connecting tube portion 10 is also because the connecting tube portion crimped by the die 40 This is to prevent the concave portion 11 of the connecting tube portion 10 from being caught by the convex portion 43 of the receiving die 42 when removing the die 10 .

Expressing the above shape in another way, as can be seen from the above example, the shape of the convex portion 43 of the receiving side die 42 is adjusted to the convex portion of the receiving side die 42 when the connecting tube portion 10 is crimped with the die 40. It is desirable that the concave portion 11 of the connecting tube portion 10 deformed along the portion 43 does not bite into the convex portion 43 of the receiving die 42 .
Alternatively, the shape of the convex portion 43 of the receiving die 42 is determined when the convex portion 43 of the receiving die 42 is viewed from the removal direction when the crimped connecting tube portion 10 is removed from the receiving die 42. It is desirable to have a shape in which each portion of the surface can be seen or overlapped with other portions (that is, a shape that does not have invisible portions that are covered by other portions).

17(A), the shape of the projection 43 of the receiving die 42 is defined by the normal vector B at an arbitrary point on the surface of the projection 43 and the removal direction A of the connecting tube portion 10. It is desirable that the angle .theta.
The same applies to the case where the receiving die 42 is provided with the concave portion 44 (in this case, the connecting tube portion 10 is provided with the convex portion 12). As shown in 17(B), the angle θ between the normal vector B at an arbitrary point on the surface of the concave portion 44 and the removal direction A of the connecting tube portion 10 is 90° or less (θ≦90°). A shape is desirable.

With the above configuration, when the connection tube portion 10 crimped by the dies 40 is removed from the receiving die 42 , the concave portion 11 and the convex portion 12 of the connecting tube portion 10 are aligned with the convex portions 43 and concave portions of the receiving die 42 . It can be smoothly removed from the receiving die 42 without biting into the 44 and being caught.

[Fifth embodiment]
By the way, as described above, when crimping the terminal 20 or the connection cylinder portion 10 of the conductor connection tube 30 with the die 40, the size of the conductor 51 of the electric wire/cable 50 to be inserted into the connection cylinder portion 10 (22, 38, 60 mm ² etc.) is used.
If a die 40 that does not match the size of the conductor 51 is used, the following problems may occur.

For example, if the connection tube portion 10 is crimped using a die 40 for a size smaller than the applicable size, the pushing-side die 41 is pushed into the connection tube portion 10 deeper than the specified pushing depth. There is a possibility that the conductor 51 that is connected to the wire may be disconnected.
For example, in the case of crimping, the dies 40 are arranged so that the tip of the pushing portion 41A of the pushing-side die 41 is kept at a specified pushing depth. , there are things that are not meant to go deeper than that. Therefore, in contrast to the above, if a die 40 larger than the applicable size is used for crimping, then the crimping becomes loose and a predetermined compression rate (deformation rate) cannot be obtained. In such a state, the contact resistance may become higher than a predetermined value, which may lead to heat generation during use. In addition, insufficient crimping may cause the conductor to come off.

Therefore, as described above, when crimping the connecting tube portion 10 with the dies 40, the die 40 is appropriately selected according to the size of the conductor 51 of the electric wire/cable 50 to be inserted into the connecting tube portion 10, and the connecting tube is crimped. It becomes necessary to crimp the part 10 .
Using the configuration described in each of the above-described embodiments of the present invention, the concave portion 11 (or the convex portion 12; the same applies hereinafter) provided on the surface 10A of the connecting tube portion 10 and the receiving side die 42 engaged therewith can be used. By changing the size and shape of the protrusions 43 (or recesses 44; the same shall apply hereinafter) provided on the inner wall surface 42A, it is possible to accurately prevent the selection error of the die 40 as described above.

Misselection of the die 40 is particularly likely to occur between adjacent sizes of the conductor 51 of the electric wire/cable 50 (ie, 22 mm ² and 38 mm ² , 38 mm ² and 60 mm ² , etc.).
Therefore, among the sizes of the conductors 51 of the electric wire/cable 50, the size, shape, position, and number of the recesses 11 provided on the surfaces of the connecting tube portions 10 that are connected to the conductors 51 of at least adjacent sizes are different. At least one of them is preferably configured to be different from each other.
In addition, among the dies 40, at least between the dies 40 used for connecting the conductors 51 of adjacent sizes and the connection tube portion 10, the size of the convex portion 43 provided on the inner wall surface 42A of the receiving side die 42, It is desirable that at least one of the shape, position, and number are configured to be different from each other.
In the following, the above points will be specifically described with reference to several configuration examples.

[Configuration example 1]
As described above, when one or more concave portions 11 are provided on the surface 10A of the connecting tube portion 10 and one or more convex portions 43 are provided on the inner wall surface 42A of the receiving die 42 (FIGS. 4A and 4B ) and FIGS. 11A and 11B), for example, at least the dice 40 for adjacent sizes can be configured so that the sizes of the concave portions 11 and the convex portions 43 are changed.
For example, the size of the concave portion 11 of the connecting tube portion 10 for 38 mm ² and the convex portion 43 of the receiving side die 42 are made larger than the size of the concave portion 11 of the connecting tube portion 10 and the convex portion 43 of the receiving side die 42 for 22 mm ² . .

However, simply changing the size of the recessed portion 11 of the connecting tube portion 10 and the size of the convex portion 43 of the receiving die 42 between adjacent sizes, for example, the receiving die 42 for 38 mm ² and the connecting tube portion for 22 mm ² 10, as shown in FIG. 18(A), the concave portion 11 and the convex portion 43 may be temporarily engaged (i.e., they do not move relatively). Such an engagement is called pseudo-engagement).
In such a case, the worker may mistakenly think that the die 40 has been selected correctly because the concave portion 11 and the convex portion 43 are engaged, and the above problems may occur. obtain.

Therefore, when false engagement occurs only by changing the size of the concave portion 11 or the convex portion 43 between adjacent sizes, for example, as shown in FIG. In addition, by changing the shape, the concave portion 11 and the convex portion 43 are not engaged (quasi-engaged).
In this case, even if the connecting tube portion 10 is set on the receiving die 42 and the connecting tube portion 10 is moved, the worker does not engage with the convex portion 43. Since it is possible to accurately reselect the die 40 that matches the connection tube portion 10 (and the conductor 51 of the electric wire/cable 50 to be inserted into it), the selection error of the die 40 as described above and problems caused by it occur. It is possible to accurately prevent this.

In addition, in the case of the configuration as described above, for example, when the connection cylinder portion 10 for 38 mm ² is set on the receiving side die 42 for 22 mm ² , as shown in FIG. 19, the connection cylinder portion 10 and the convex portion 43 of the receiving die 42 are engaged with each other. However, in this case, when the connecting tube portion 10 is moved on the receiving side die 42, if the connecting tube portion 10 moves slightly, the concave portion 11 and the convex portion 43 come into contact, and if the connecting tube portion 10 is moved in another direction, the connecting tube portion 10 is connected. The cylinder part 10 moves a little and the concave part 11 and the convex part 43 come into contact with each other.
Therefore, when the worker confirms that the projection 43 is rattling in the recess 11 in this way, he/she recognizes that the size is wrong and inserts a dice suitable for the connection cylinder 10 and the conductor 51 . 40 (the die for 38 mm ² in the above case) can be reselected precisely. Therefore, it is possible to accurately prevent the occurrence of wrong selection of the die 40 or the like.

[Configuration example 2]
In the above configuration example 1, the case where the size or the size and the shape of the concave portion 11 of the connecting tube portion 10 or the convex portion 43 of the receiving-side die 42 is changed at least between adjacent sizes has been described, but these shapes are simply changed. By doing so, it is also possible to prevent a mistake in selecting the dice 40 between adjacent sizes.
That is, for example, in the connecting tube portion 10 and the receiving die 42 for 22 mm ² , the concave portion 11 and the convex portion 43 are formed to extend in the axial direction of the connecting tube portion 10 as shown in FIGS. 21(A) and 21(B), the concave portion 11 and the convex portion 43 of the connecting tube portion 10 for 38 mm ² and the receiving side die 42 are formed in a circular shape perpendicular to the axial direction of the connecting tube portion 10 as shown in FIGS. Suppose that it is provided in an elongated oval shape.

In this state, when the connecting tube portion 10 for 22 mm ² (see FIG. 20A) is set in the receiving die 42 for 38 mm ² (see FIG. 21B), if the concave portion 11 of the connecting tube portion 10 Even if the projection 43 of the receiving die 42 has the same size and is provided at the same position, the recess 11 and the projection 43 do not engage because of their different shapes.
Therefore, by changing the shapes of the recessed portion 11 of the connecting tube portion 10 and the convex portion 43 of the receiving-side die 42 between adjacent sizes, it is possible to prevent misselection of the die 40 between adjacent sizes.

20(A), (B) and FIGS. 21(A), (B), the size of the conductor 51 (not shown) of the electric wire/cable 50 is different. are different in length and diameter, they are shown as being the same for the sake of clarity.
This point also applies to each of the following figures.

[Configuration example 3]
In addition, by changing the positions of the concave portion 11 of the connecting tube portion 10 and the convex portion 43 of the receiving-side die 42 between at least adjacent sizes, it is possible to prevent selection errors of the dice 40 between adjacent sizes. .

That is, for example, in the connection cylinder part ¹⁰ for 22 mm ² and the receiving side die 42, the concave part 11 and the convex part 43 are provided at the positions shown in FIGS. Assume that the dice 42 has the concave portion 11 and the convex portion 43 provided at positions as shown in FIGS.
In this state, even if the connecting tube portion 10 (see FIG. 10) for 22 mm ² is set to the receiving die 42 (see FIG. 22B) for 38 mm ² , the concave portion 11 and the convex portion 43 are engaged. The recess 11 and the protrusion 43 do not engage because they are not in a possible position.

Further, for example, when the concave portion 11 of the connecting tube portion 10 is provided at a position as shown in FIG. 21(B), the concave portion 11 of the connecting tube portion 10 and the convex portion 43 of the receiving side die 42 are not in a position where they can be engaged. does not engage.
In this way, by changing the positions of the concave portion 11 of the connecting tube portion 10 and the convex portion 43 of the receiving side die 42 at least between adjacent sizes, it is possible to prevent the wrong selection of the die 40 between adjacent sizes. can be done.

Even when the positions of the concave portions 11 of the connecting tube portions 10 are changed between at least adjacent sizes as described above, as described in the above [Third Embodiment-Part 1] (Fig. 11(A), (B)), in order to be able to set the connecting tube portion 10 to the receiving die 42 even if the direction in which the conductor 51 of the electric wire/cable 50 is inserted into the receiving die 42 is changed, the connection The plurality of concave portions 11 provided in the cylindrical portion 10 are configured to be provided at points symmetrical with respect to the point C10 as shown in FIGS. ₁₀ , 22A, and 23A. is desirable.

[Configuration example 4]
Also, by changing the number of concave portions 11 of the connecting tube portion 10 and the number of convex portions 43 of the receiving-side die 42 at least between adjacent sizes, it is possible to prevent selection errors of the dice 40 between adjacent sizes. .

That is, for example, two concave portions 11 are provided on the connecting tube portion 10 for 22 mm ² as shown in FIG. 23, and four convex portions 43 are provided on the receiving die 42 for 38 mm ² as shown in FIG. do.
In this state, when the connecting tube portion 10 for 22 mm ² is set on the receiving side die 42 for 38 mm ² , the connecting tube portion 10 is provided with concave portions 11 corresponding to the two convex portions 43 a of the receiving side die 42 . As a result, the concave portions 11 of the connecting tube portion 10 and the convex portions 43 of the receiving die 42 are not engaged.
In this way, by changing the number of the concave portions 11 of the connecting tube portion 10 and the number of the convex portions 43 of the receiving-side die 42 at least between adjacent sizes, it is possible to prevent the wrong selection of the die 40 between adjacent sizes. can be done.

In the above case, although illustration is omitted, two protrusions 43 are provided on the receiving die 42 for 22 mm ² , and four recesses 11 are provided on the connecting tube portion 10 for 38 mm ² . It means that Therefore, if the connecting tube portion 10 having four concave portions 11 is set in the receiving side die 42 having two convex portions 43 , the two convex portions 43 of the receiving side die 42 are two out of the four concave portions 11 of the connecting tube portion 10 . The other recesses 11 do not interfere with the engagement.
Therefore, in this case, it seems that the connecting tube portion ¹⁰ and the receiving die 42 are engaged with ^each other in adjacent sizes. is large, it cannot be set in the receiving die 42 for 22 mm ² (does not fit). Therefore, the selection error of the die 40 does not occur.

[Configuration example 5]
As described above, at least one element out of the size, shape, position, and number of the concave portions 11 of the connecting tube portion 10 and the convex portions 43 of the receiving-side die 42 is different between adjacent sizes. However, as in the case where both the size and shape are changed as described in [Configuration example 1], each element such as size and shape may be appropriately combined, and at least adjacent sizes may be changed. is also possible.
It is also possible to combine these elements with other elements (eg, color, etc.) so that they change at least between adjacent sizes.

[Sixth embodiment]
By the way, in each of the above-described embodiments, the convex portion 43 (or concave portion) provided on the inner wall surface 42A of the receiving die 42 and the concave portion 11 (or convex portion) provided on the surface 10A of the connecting tube portion 10 are formed in a dot shape (Fig. 1 (A), (B), etc.) or oval shape (see FIGS. 20 (A), (B), etc.), but for example, it is also possible to provide these in a band shape. is.
Specific examples will be given below.

Although the convex portion 43 provided on the inner wall surface 42A of the receiving die 42 will be described below, it may be a concave portion as described above.
Further, description and illustration of the pressing-side die 41 (see FIGS. 2A and 2B, etc.) will be omitted below. Further, description and illustration of the concave portion 11 (or convex portion) provided on the surface 10A of the connecting tube portion 10 are omitted, but as in the above embodiment, they are the convex portion 43 (or concave portion).

[Configuration example A]
For example, as shown in FIGS. 25A and 25B, the inner wall surface 42A of the receiving die 42 is perpendicular to the axial direction of the die 40 (that is, the axial direction of the connecting tube portion 10 set on the die 40). It is also possible to form the protrusion 43 by raising it in a semicircular belt shape.
Also in this case, as shown in FIGS. 25A and 26A to 26C, the dice 40 are used for connecting at least the conductors 51 of adjacent sizes to the connecting tube portion 10. If the dies 40 (hereinafter referred to as dies 40 for adjacent sizes) are configured so that the number and position of the band-shaped protrusions 43 are different from each other, the selection error of the dies 40 as described above can be accurately prevented. It becomes possible to

The same applies to configuration examples B and C, which will be described later, but as in a modification of configuration example D described later (see FIGS. 32A and 32B described later), the strip-shaped convex portion 43 is It is also possible to divide it in a direction orthogonal to the axial direction of 40 and to configure it intermittently.
When the strip-shaped projections 43 are intermittently provided on the inner wall surface 42A of the receiving die 42 in the direction orthogonal to the axial direction of the die 40, the surface 10A of the connecting tube portion 10 is correspondingly provided with The concave portions 11 (or convex portions) to be provided are also intermittently provided in a direction perpendicular to the axial direction of the die 40 (that is, the axial direction of the connecting tube portion 10 set on the die 40).

26(B) and 26(C), the strip-shaped convex portion 43 is arranged in the center of the die 40 in the axial direction. ), (B), etc.), it is necessary to consider the electrical performance and mechanical performance after crimping because the compressibility will decrease at that part as described above. .
Therefore, for example, the belt-like convex portion 43 in the center of the die 40 in the axial direction is formed so as not to be provided at a position corresponding to the position R (see FIG. 9) to be pushed by the pushing portion 41A. By intermittently forming 43, it is also possible to suppress a decrease in compressibility.

[Configuration example B]
Further, as shown in FIGS. 25A and 25B, the inner wall surface 42A of the receiving die 42 is provided with a semicircular strip-shaped projection 43 one by one in the direction orthogonal to the axial direction of the die 40. Instead of forming, for example, as shown in FIG. 27, it is also possible to arrange and form a plurality of semicircular band-shaped convex portions 43 (two each in FIG. 27).
With this configuration, it is possible to more accurately prevent the selection of the dice 40 from being erroneously made. Also in this case, although illustration is omitted, it is also possible to configure the dies 40 for adjacent sizes so that the positions of the band-shaped protrusions 43 arranged in a plurality thereof are different from each other.

[Configuration example C]
Further, as shown in FIGS. 28A to 28C, a plurality of semicircular strip-shaped protrusions 43 are formed on the inner wall surface 42A of the receiving die 42 in a direction orthogonal to the axial direction of the die 40 ( 28), it is also possible to change the size of the band-shaped projections 43 to be arranged.
With this configuration, it is possible to more accurately prevent the selection of the dice 40 from being erroneously made. Also in this case, although illustration is omitted, the dies 40 for adjacent sizes may be configured such that the positions of the band-shaped protrusions 43 arranged in a plurality of strips are different from each other, or the protrusions 43 may be arranged at each position. It is also possible to change the order of the magnitudes of .

As shown in configuration examples A to C, when the band-shaped protrusions 43 are formed in a semicircular shape, if the size of the protrusions 43 is simply changed, the dies 40 for adjacent sizes will not be able to match each other. 18(A) may occur, similar to the case shown in FIG. It is also possible to configure the top portion to be flat.

In addition, in the above configuration examples A to C, the cases where the protrusions 43 are formed in a semicircular belt shape have been described, but as shown in FIGS. It is also possible to configure the wall surface 42A to be raised in a trapezoidal belt shape to form the projections 43, and the cross-sectional shape of the projections 43 when forming the projections 43 in a belt shape does not necessarily have to be semicircular.
Even if the convex portion 43 is formed in a belt shape such as a trapezoidal shape, it is possible to obtain the same beneficial effects as those of the above configuration examples A to C and each of the above embodiments.

[Configuration example D]
Further, for example, as shown in FIG. 30, both ends of the inner wall surface 42A of the receiving die 42 in the axial direction of the die 40 are raised in a strip shape in a direction orthogonal to the axial direction of the die 40 to form a convex portion 43. It is also possible to configure
Then, as shown in FIG. 31, the interval La between the strip-shaped projections 43 at both ends is set to be approximately equal to the length Lb of the non-chamfered surface 10A of the connecting tube portion 10 to be set (or If the interval La is slightly longer, the connection tube portion 10 can be stably set on the die 40 when the connection tube portion 10 is set on the die 40 . and the connecting tube portion 10 can be easily and appropriately aligned.

The length Lb of the non-chamfered surface 10A portion of the connecting tube portion 10 varies depending on the size (22, 38, 60 mm ² , etc.) of the conductor 51 of the electric wire/cable 50 to be inserted into the connecting tube portion 10 .
Therefore, if a die 40 having a different size is used, when the connecting tube part 10 is set on the die 40, the connecting tube part 10 cannot be set on the receiving side die 42 (if Lb>La), or cannot be set. Also, the connecting tube portion 10 moves in the axial direction of the receiving side die 42 (in the case of Lb<La). It is possible to accurately prevent the selection error of .

In this case, as shown in FIG. 29, it is possible to form the band-shaped convex portion 43 so as to extend over the entire axial direction of the die 40. However, as shown in FIGS. As shown in FIG. 3, the dies 40 may be divided in a direction perpendicular to the axial direction of the die 40 and intermittently provided.
Even with this configuration, the strip-shaped convex portion 43 functions in exactly the same manner as in the case shown in FIG. 29, and the same beneficial effects as described above can be obtained.

It goes without saying that the present invention is not limited to the above-described embodiments and the like, and can be modified as appropriate without departing from the gist of the present invention.

For example, in each of the above embodiments, the die 40 is composed of two parts, the pressing side die 41 and the receiving side die 42, but as described above, the die 40 is composed of three or more parts. may be configured.
In that case, the convex portion 43 and the concave portion 44 provided on the die 40 may be provided on any one of the parts constituting the die 40 . Moreover, the convex part 43 and the concave part 44 may be provided in a plurality of parts among the parts.

Moreover, when the terminal 20 and the connection tube portion 10 of the conductor connection tube 30 are set in the die 40, the part (corresponding to the receiving side die 42 in each of the above-described embodiments) that first comes into contact with them has a projection 43. If the recessed portion 44 is provided, when the terminal 20 or the connecting tube portion 10 of the conductor connecting tube 30 that matches the size of the die 40 is set in the die 40, the recessed portion 11 provided in the connecting tube portion 10 or the This is desirable because the protrusion 12 naturally engages with the protrusion 43 or recess 44 of the part that comes into contact with it first.

10 Connection tube portion 10A Surface 11 Concave portion 12 Convex portion 20 Terminal 30 Conductor connecting tube 40 Die 41 Pushing side die 41A Pushing portion 42 Receiving side die (die)
42A Inner wall surface 43 Convex portion 44 Concave portion 50 Electric wire/cable 51 Conductor C ₁₀ intersection point Cd Center of pushing portion (center)
D Overlap d Half length of overlap R Position

Claims (11)

In the connection tube portion that is connected to the conductor by being crimped together with the conductor of the inserted electric wire / cable,
In the crimping die, the surface of the connecting tube portion is engaged with a protrusion or a recess provided on the inner wall surface of the crimping die for crimping the connecting tube portion into which the conductor is inserted. A concave portion or a convex portion for axial positioning of the connecting tube portion is provided,
The connection cylinder part, wherein the recessed part or the projection part provided on the surface of the connection cylinder part is provided at a position avoiding a position to be pushed by the pushing part of the crimping die. The protrusions or recesses provided on the inner wall surface of the crimping die and the recesses or protrusions provided on the surface of the connecting cylinder are formed in a point shape, an oval shape, or a belt shape. The connection tube part according to claim 1. A plurality of recesses or protrusions are provided on the surface of the connecting tube,
The plurality of concave portions or convex portions correspond to an extension of the trajectory drawn by the center of the pressing-side die of the crimping dies when the center of the pressing-side die of the crimping dies moves when crimping the connecting tube portion with the dies for crimping. 3. The connection cylinder part according to claim 1, wherein the connection cylinder parts are provided at point-symmetrical positions with respect to the intersection with the surface. A terminal comprising the connecting tube portion according to any one of claims 1 to 3 . A crimping die that connects the conductor and the connection tube by crimping the connection tube together with the conductor of the inserted electric wire/cable,
The connection within the crimping die is provided on the inner wall surface of the crimping die at a position that avoids a position where the surface of the connecting tube portion is pushed by the pushing portion of the crimping die. 1. A crimping die, characterized in that it is provided with projections or recesses that engage with recesses or projections for axial positioning of a cylindrical portion. An angle formed by a normal vector at an arbitrary point on the surface of the convex portion or concave portion provided on the inner wall surface of the crimping die and the removing direction of the connecting tube portion is 90° or less. A die for crimping according to claim 5 . In the crimping die for crimping the connection tube portion that is connected to the conductor by being crimped together with the conductor of the inserted electric wire/cable, and the connection tube portion into which the conductor is inserted,
A concave portion for positioning the connecting tubular portion in the crimping die in the axial direction, which engages with a convex portion or a concave portion provided on the inner wall surface of the crimping die, on the surface of the connecting tubular portion. Or a convex part is provided,
The inner wall surface of the crimping die is provided with the convex portion or concave portion that engages with the concave portion or convex portion provided on the surface of the connecting tube portion,
The concave or convex portion provided on the surface of the connecting tubular portion is provided at a position avoiding a position where it is pushed in by the pushing portion of the pressing die for connecting and crimping. dice. In connection structures that connect conductors and terminals of wires and cables,
The surface of the connection tube portion of the terminal engages with a convex portion or a recess provided on the inner wall surface of a crimping die for crimping the connection tube portion. A concave portion or convex portion for axial positioning is formed,
The concave portion or convex portion provided on the surface of the connecting tube portion is crimped by the pressing portion of the crimping die when the connecting tube portion is crimped together with the conductor of the wire/cable inserted therein. A connection structure characterized by being provided at a position avoiding the pushed position. In the construction method for connecting the connection cylinder and the conductor of the electric wire/cable using a crimping die,
The connecting cylinder is provided with a concave portion or a convex portion for positioning the connecting cylinder portion in the axial direction in the crimping die at a position on the surface thereof, which avoids the position where the pressing portion of the crimping die pushes in. inserting the conductor into the part,
The connecting tube portion is attached to the crimping die having a convex portion or a concave portion on the inner wall surface thereof, and the concave portion or convex portion of the connecting cylindrical portion is engaged with the convex portion or concave portion of the crimping die. set it so that
A construction method, wherein the connection cylinder portion and the conductor are connected by crimping the connection cylinder portion together with the inserted conductor with the crimping dies. Regarding the connection cylinder part according to any one of claims 1 to 3,
Among the sizes of the conductors of the electric wire/cable, the other connecting tube portion connected to at least the adjacent conductor of the size refers to the size, shape, position, A construction method, characterized in that at least one of the numbers is made different from each other to match the connection tube portion and the die to connect the connection tube portion and the conductor. Regarding the die according to claim 5 or claim 6,
Among the crimping dies, the other crimping dies used for connecting at least the conductors of adjacent sizes and the connecting cylinder part have the size of the protrusion or recess provided on the inner wall surface thereof, A connection tube and a conductor of an electric wire or cable, characterized in that the connection tube and the die are adapted to each other by making at least one of shape, position, and number different from each other, and the connection tube and the conductor are connected. Construction method to connect with.

Images