JP2003323921A - Signal cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a signal cable capable of preventing connection failure between a core wire and a connection fitting while reducing a manufacturing cost. <P>SOLUTION: The signal cable 1 is provided with the connection fitting 2 attached to at least one end part of a cable body C with the core wire Cb coated by a coating Ca, and an insulating material made case 3 covering connecting portions of the cable body C and the connection fitting 2. The connection fitting 2 is provided with a fitting body 11 connected to a connection object body, and a coupler 12 formed with a fixing press-bonding part press-bonded on the coating Ca to fix the connection fitting 2 on an end part of the cable body C and a connecting part electrically connected to the core wire Cb and connecting the fitting body 11 to the end part of the cable body C. The fitting body 11 and the coupler 12 are joined by caulked joint. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal cable in which a connecting fitting is attached to an end of a cable body and is covered with a case made of an insulating material.

[0002]

2. Description of the Related Art As this type of signal cable, a signal cable 61 shown in FIG. 13 has been conventionally known. The signal cable 61 includes a cable body C whose core Cb is covered with a coating Ca, a connecting fitting 62 attached to an end of the cable body C with solder S, an end of the cable body C and a base of the connecting fitting 62. It is provided with a case 63 made of an insulating material (resin R), which is formed by molding so as to cover the end portion 62a. In this case, an end portion (not shown) of the signal cable 61 is covered with a case made of an insulating material with a contactor, an crocodile clip, etc. connected to the core wire Cb. The connecting fitting 62 is a so-called banana plug,
By being inserted (connected) to the measuring device (not shown), the contactor, the crocodile clip and the like are electrically connected to the measuring device through the core wire Cb. In manufacturing the signal cable 61, first, the coating C at the end of the cable body C is formed.
A is peeled off to expose the core wire Cb. Next, the connection fitting 62
The core wire Cb is soldered and fixed to the base end portion 62a of the. As a result, the connecting fitting 62 is fixed to the end of the cable body C, and the core wire Cb and the base end 62a (connecting fitting 6
2) and are electrically connected. Next, the cable body C
After the connection fitting 62 attached to is installed in the mold, the case 63 is molded by injecting the resin R into the mold. As a result, the signal cable 61 is completed.

On the other hand, the signal cable 71 shown in FIG.
The cable main body C, the connecting metal fitting 72 attached to the end of the cable main body C, and the case 7 molded by resin R
3 and 3. In this case, a contact, a crocodile clip, or the like is attached to the end portion of the signal cable 71, which is not shown, in the same manner as the signal cable 61. The connection fitting 72 is crimped to the coating Ca of the cable body C to fix the connection fitting 72 to the end of the cable body C.
And the core wire Cb is electrically connected by soldering. In manufacturing the signal cable 71, first, the coating Ca is peeled off to expose the core wire Cb, and then the crimp portion 72a is crimped to the coating Ca. This allows
The connection fitting 72 is fixed to the end of the cable body C. Next, the core wire Cb is fixed to the connection fitting 72 by soldering. As a result, the core wire Cb and the connection fitting 72 are electrically connected. Next, after the connection fitting 72 attached to the cable body C is installed in the mold, the case 73 is molded by injecting the resin R into the mold. This allows
The signal cable 71 is completed.

[0004]

However, the conventional signal cables 61 and 71 have the following problems. That is, in the conventional signal cable 61, the base end portion 62a of the connection fitting 62 is fixed to the core wire Cb of the cable body C by soldering, so that the core wire Cb and the base end portion 62a are electrically connected to each other. A connection fitting 62 is fixed to the end of the cable body C. In this case, when the cable body C is pulled in the direction shown by the arrow A in FIG.
The force directly acts on the core wire Cb. Therefore, in the conventional signal cable 61, when the cable body C is pulled, the solder S (core wire Cb) is peeled off from the base end portion 62a and the electrical connection between the core wire Cb and the connection fitting 62 is cut off. There is a problem that sometimes.

Further, in this signal cable 61, the case 63 is molded by injecting resin R into the mold with the connection fitting 62 having the cable main body C attached thereto being installed in the mold. In this case, although the connection fitting 62 can be positioned with respect to the molding die at the time of molding, it is difficult to position the cable body C without rattling within the mold. Therefore, FIG.
As shown in, the resin R injected into the mold sometimes presses the cable main body C against the mold. In such a case, the cable main body C is positioned near the outer surface of the case 63. There is a problem that the case 63 is molded (with the cable main body C being biased). Furthermore, in the conventional signal cable 61, the core wire C is soldered.
Although b is fixed to the base end portion 62a, the heat applied to the base end portion 62a during the soldering work is transferred to the entire connection fitting 62, so that the heating of the base end portion 62a becomes insufficient and the core wire Cb There is a problem that the connection state between the base end portion 62a and the base end portion 62a may be incomplete. If the core wire Cb and the base end portion 62a are to be completely connected, the base end portion 6
Since it is necessary to heat 2a sufficiently, there is a problem that the soldering work takes a long time.

On the other hand, in the signal cable 61A shown in FIG. 16, in addition to the configuration of the signal cable 61, the cable body C
It has a crimp ring 65 crimped to the coating Ca of.
In this signal cable 61A, the cable body C has an arrow A
When it is pulled in the direction of
3 (resin R), the movement of the coating Ca is restricted. Therefore, even if the cable body C is pulled, its force does not act on the connection portion between the core wire Cb and the base end portion 62a, and the core wire Cb (solder S) is connected to the base end portion 62.
It is possible to avoid peeling from a. However, since the connection fitting 62 and the crimp ring 65 are configured as separate and independent parts, the crimp position of the crimp ring 65 varies when the signal cable 61A is manufactured. In this case, for example, as shown in FIG.
Is crimped to a position far away from the connection fitting 62, the case 63 is molded with the crimp ring 65 positioned closer to the outer surface of the case 63 when molding the case 63. In such a case, when the cable main body C is pulled in the direction of the arrow A, the case 63 is damaged, and further, the force pulling the cable main body C causes the core wire Cb and the base end portion 6 to be broken.
There is a problem that the core wire Cb (solder S) is peeled off from the base end portion 62a because it acts directly on the connection portion with 2a.

Further, in the signal cable 71, by using the connecting fitting 72 having the crimping portion 72a crimped to the coating Ca of the cable body C, the cable body C is pulled in the direction of arrow A shown in FIG. It is possible to avoid peeling of the solder S when the solder S is peeled off. In addition, since the crimping portion 72a and the base end portion 62a are integrally formed, the cable body C can be positioned in the mold during the molding of the case 73, and the cable body C is biased. Thus, the case 73 can be prevented from being molded. However, with this signal cable 71,
Since 2 is larger than the connecting fittings 62 of the signal cables 61 and 61A, the heat applied during the soldering work of the core wire Cb is transferred to the entire connecting fittings 72, and the heating of the base end portion 62a becomes insufficient, so that the core wires are not heated. There is a problem that the connection state between Cb and the connection fitting 72 is more likely to be incomplete. Further, in the signal cable 71, since the connecting fitting 72 has a relatively complicated structure, there is a problem that the manufacturing cost of the entire signal cable 71 is increased due to the cost of the parts.

The present invention has been made in view of the above problems, and a main object of the present invention is to provide a signal cable capable of preventing a defective connection between a core wire and a connecting fitting while reducing the manufacturing cost. To do.

[0009]

In order to achieve the above object, a signal cable according to claim 1 is attached to at least one end of a cable main body having a core wire covered with a coating, and the core wire is attached to an object to be connected. A signal cable comprising a connection fitting for electrically connecting, and a case made of an insulating material for covering the connection part of the cable body and the connection fitting,
The connection fitting is electrically connected to a fitting main body connected to the connection target body, a fixing crimping portion that is crimped to the cover to fix the connection fitting to the end portion of the cable body, and the core wire. A connecting portion is formed to connect the metal fitting body to the end portion of the cable body, and the metal fitting body and the connecting metal fitting are caulked and joined together.
They are joined by any one of joining methods such as rivet joining, bolt tightening, soldering, welding and press fitting.

The signal cable according to claim 2 is the signal cable according to claim 1.
In the signal cable described above, the connecting portion is configured by a connecting crimp portion that is crimped to the core wire to electrically connect the connecting fitting to the core wire.

The signal cable according to claim 3 is the signal cable according to claim 1.
Alternatively, in the signal cable according to 2, the case is
A mold is molded from the insulating material so as to come into close contact with the end of the cable body and the end of the connection fitting.

The signal cable according to claim 4 is the signal cable according to claim 1.
In the signal cable according to any one of 1 to 3, the metal fitting body is provided with a caulking joint convex portion for joining to the connecting metal fitting, and the connecting metal fitting is provided with the caulking joint convex portion. A joining hole that can be inserted is formed, and the metal fitting body and the connecting metal fitting are joined by caulking the caulking joining convex portion that is inserted into the joining hole.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the signal cable according to the present invention will be described below with reference to the accompanying drawings.

First, regarding the configuration of the signal cable 1,
A description will be given with reference to the drawings.

As shown in FIG. 1, the signal cable 1 includes a cable body C, a connecting fitting 2 and a case 3. In this case, the end portion of the signal cable 1 (not shown) is covered with a case made of an insulating material, to which contacts, crocodile clips and the like are attached. The configuration and manufacturing method for the other end (not shown) is basically the same as the one end (the end on the side to which the connecting fitting 2 is connected) shown in the figure, so In the embodiment of the invention, the configuration on one end side will be described as a representative.

As shown in FIG. 2, the connecting fitting 2 is composed of two fittings, namely, a fitting body 11 and a connecting fitting 12 which are integrated by caulking. The metal fitting body 11 is
A so-called banana plug, which is entirely made of metal and is connected to a measuring device (not shown) as a connection object according to the present invention, thereby contacting through the connecting fitting 12 and the core wire Cb of the cable body C. Electrically connect a child or crocodile clip to the measuring device. Also, the metal fitting body 1
1, a connecting portion 11a for connecting to the measuring device and a ring-shaped joining convex portion (caulking joining convex portion) 11b for joining to the connecting fitting 12 are formed. On the other hand, the connecting fitting 12 is a fitting for connecting the fitting body 11 to the cable body C, and is composed of a round crimp terminal formed entirely of metal. The connecting fitting 12 has a crimping portion 12 that is crimped to the coating Ca of the cable body C.
a (fixing crimping portion in the present invention) and cable body C
A crimping portion 12b to be crimped to the core wire Cb (a crimping portion for connection as a connecting portion in the present invention) and a joining hole 12c into which the joining convex portion 11b of the metal fitting body 11 can be inserted are formed. As shown in FIG. 1, the case 3 is molded with an insulating resin R so as to cover the end of the cable body C and the connection fitting 2.

Next, a method of manufacturing the signal cable 1 will be described with reference to the drawings.

First, as shown in FIG. 2, the cable body C
The core Ca is exposed by peeling off the coating Ca on the end portion of. Next, as shown in FIG. 3, the connecting fitting 12 is set on the cable body C. In this case, the coating Ca is the pressure-bonding portion 1
The connecting fitting 12 is positioned with respect to the cable body C so that the core wire Cb contacts the crimp portion 12b and the core wire Cb contacts the wire fitting 2a. Then, using a crimping jig (not shown), the crimping portion 1
By crushing 2a and 12b, the crimping portion 12a is crimped to the coating Ca and the crimping portion 1 is pressed as shown in FIG.
2b is crimped to the core wire Cb. At this time, the crimping portions 12a and 12b may be individually crimped in sequence using a general crimping jig, or both crimping portions 1 may be crimped using a dedicated crimping jig.
You may crimp 2a, 12b simultaneously. Thus, the crimping portion 12a fixes the connecting fitting 12 to the end of the cable body C, and the crimping portion 12b electrically connects the connecting fitting 12 to the core wire Cb.

Subsequently, after the metal fitting body 11 is installed on the caulking table (not shown), as shown in FIG.
The connecting fitting 12 is installed so that the joining convex portion 11b of the above is inserted into the joining hole 12c. Next, as shown in FIG.
The metal fitting body 11 is caulked and joined to the connecting metal fitting 12 by squeezing and crimping the joining convex portion 11b by the crimping jig P. As a result, the metal fitting body 11 and the connecting metal fitting 1
2 and 1 are integrated and electrically connected to each other.
Is completed. Next, the connection fitting 2 attached to the cable body C is installed in the molding die. In this case,
The metal fitting body 11 is positioned in the mold, and the cable body C is also held in the mold (without rattling) while being held by the connecting fitting 12 and restricted in movement. Subsequently, the case 3 is molded by injecting the resin R into the mold. As a result, the signal cable 1 is completed as shown in FIG.

According to this signal cable 1, the connecting fitting 1
By fixing the connecting fitting 12 to the cable body C by crimping the crimping portion 12a of No. 2 to the coating Ca of the cable body C, when the cable body C is pulled in the direction shown by the arrow A in FIG. The entire connection fitting 2 is pulled by Ca. Therefore, the conventional signal cable 6
Unlike 1 and 61A, even if the cable main body C is pulled, it is possible to avoid applying a force to the core wire Cb in the direction of peeling it from the connecting fitting 2 (in this case, the connecting fitting 12). As a result, it is possible to avoid disconnection of the core wire Cb and the connection fitting 2 when the cable body C is pulled. Further, according to this signal cable 1, the connecting metal fitting 12 attached to the end of the cable body C is used.
On the other hand, by adopting the configuration in which the metal fitting body 11 is joined by caulking, it is possible to join the metal fitting body 11 and the connecting metal fitting 12 in a short time and easily as compared with other joining methods. In addition, since looseness and peeling of the joining portion are unlikely to occur, a good connection state of the metal fitting body 11 and the connecting metal fitting 12 can be maintained for a long period of time. Further, in the state where the metal fitting body 11 and the connecting metal fitting 12 are joined, the cable body C is accurately positioned by the connecting metal fitting 12 without moving with respect to the metal fitting body 11, so that the cable body C is molded when the case 3 is molded. Since the movement of the case 3 in the mold is restricted, it is possible to reliably prevent the case 3 from being molded with the cable body C being biased.

Further, according to the signal cable 1, since the metal fitting body 11 is fixed to the connecting metal fitting 12, the metal fitting body 12 (contact, crocodile mouth) having a different shape from the metal fitting body 11 is used as the common metal fitting 12 as a common component. Various signal cables can be manufactured by fixing (joining) the clip, the worm clip, etc. to the connecting fitting 12. Therefore, as shown in FIG. 7, the cable body C having the connecting fittings 12 attached to both ends thereof (hereinafter, the cable body C in this state is also referred to as a “cable with a fitting Cx”).
By making in advance, this cable Cx with metal fittings
Can be commonly used for various signal cables, so that the manufacturing cost of various signal cables including the signal cable 1 can be sufficiently reduced. In this case, the joining convex portion 11
By adopting a configuration in which b is inserted into the joining hole 12c and joined by caulking, it is possible to use an inexpensive round crimp terminal widely distributed in the market as the connecting fitting 12. The manufacturing cost of the signal cable 1 can be sufficiently reduced.

Further, according to the signal cable 1, since the core wire Cb and the connecting fitting 12 are electrically connected by the crimping portion 12b, the core wire C is soldered.
Conventional signal cables 61 and 6 for connecting b and the connection fitting
Compared with 1a and 71, the connection fitting 2 (coupling fitting 12) and the core wire Cb can be connected reliably in a short time. Further, according to this signal cable 1, the case 3 is configured so that the resin R is closely attached to the end of the cable body C and the end of the connection fitting 2 (in this case, the entire connecting fitting 12 and the base end of the fitting main body 11). Since the end portion of the cable main body C, the connecting metal fitting 12 and the metal fitting main body 11 are integrally fixed by the case 3 by the frame molding, when the cable main body C is pulled, It is possible to avoid peeling of the cable body C.

The present invention is not limited to the configuration shown in the above-mentioned embodiment of the present invention. For example, in the embodiment of the present invention, the L-type signal cable 1 in which the metal fitting body 11 is arranged in a direction orthogonal to the longitudinal direction of the cable body C has been described as an example. As shown, the present invention can be applied to a straight type signal cable 21 in which the metal fitting body 11 is arranged along the longitudinal direction of the cable body C. When manufacturing the signal cable 21, the connecting metal fitting 12 attached to the end of the cable body C and the metal fitting body 11 are joined together by caulking in the same manner as the signal cable 1 described above, and then the connecting metal fitting 12 is formed. The terminal portion (the tip portion where the joining hole 12c is formed) is bent. Next, by installing the connection fitting 2 in this state in the mold and injecting the resin R,
The case 23 is formed. As a result, the signal cable 21
Is completed. In this signal cable 21, even if the cable body C is pulled in the direction of the arrow A, the entire connection fitting 2 is pulled by the coating Ca, so that the core wire Cb and the connection fitting 2 are pulled in the same manner as the signal cable 1. It is possible to avoid the disconnection of.

Further, in the embodiment of the present invention, the metal fitting main body 11 and the connecting metal fitting 12 are described by exemplifying the connecting metal fitting 2 which is joined by caulking. However, the connecting metal fitting in the present invention is not limited to this. Not done. For example, in the connection fitting 30 shown in FIG. 9, instead of the fitting main body 11 of the connection fitting 2, a fitting main body 31 having an insertion hole 31b formed at the base end thereof is used, and a joining hole of the connecting fitting 12 is formed. Insert the rivet 33 through which the 12c is inserted into the insertion hole 31 of the metal fitting body 31.
By press fitting into b, the metal fitting body 31 and the connecting metal fitting 12
And are riveted together. Further, in the connection fitting 40 shown in FIG. 10, instead of the fitting main body 11 in the connection fitting 2,
Metal fitting body 41 having a bolt hole 41b formed at the base end thereof
The bolt main body 41 and the connecting metal fitting 12 are joined to each other by bolting the bolt 43, which is inserted through the joining hole 12c of the connecting metal fitting 12, into the bolt hole 41b of the metal fitting body 41.

Furthermore, in the connection fitting 50A shown in FIG.
By using the metal fitting body 11 and the connecting metal fitting 12 in the connecting metal fitting 2, the joining convex portion 11b, which is inserted through the joining hole 12c of the joining metal fitting 12, is soldered to the rim of the joining hole 12c with the solder S. By fixing with the bracket body 1
1 and the connecting fitting 12 are joined. Further, in the connection fitting 50B shown in FIG. 12, the fitting main body 11 and the connection fitting 12 of the connection fitting 2 are used, and the fitting projection 11b is inserted into the joining hole 12c of the connection fitting 12 in the fitting main body. By welding the upper surface of 11 and the lower surface of the connecting fitting 12 (spot welding as an example), the fitting main body 11 and the connecting fitting 12 are joined. These connection fittings 30, 4
According to 0, 50A, and 50B, similarly to the connection fitting 2 illustrated in the embodiment of the present invention, the electrical connection between the core wire Cb and the connection fitting is broken due to the pulling of the cable body C. It is possible to avoid the sagging, and moreover, since the movement of the cable body C at the time of molding the case can be restricted by these connecting fittings, it is possible to mold the case with the cable body C being biased. It can be avoided. Further, the method of joining the metal fitting body and the connecting metal fitting is not limited to the above-described joining method, and one of the metal fitting body and the connecting metal fitting is provided with a female bevel and the other is provided with a male bevel. You may employ | adopt the connection method which connects a metal fitting main body and a connection metal fitting by press-fitting a mold cast into a female cast. In this case, as the bullet, various shapes such as a round bullet and a flat bullet can be adopted. According to this structure, a tool for joining is unnecessary, and the fitting main body and the connecting fitting can be easily joined.

Further, in the embodiment of the present invention, an example in which a round crimp terminal is used as the connecting fitting 12 has been described, but the shape of the connecting fitting in the present invention is not limited to this. It is also possible to use an open type crimp terminal) or to newly produce and use a dedicated connecting fitting. Furthermore, in the embodiment of the present invention, an example in which a banana plug is used as the metal fitting body 11 has been described, but the shape of the metal fitting body in the present invention is not limited to this, and various types of contacts, crocodile clips, worm clips, etc. Connection fittings can be used. Further, in the embodiment of the present invention, an example in which the case 3 is mold-molded so as to cover the end portion of the cable body C and the connection fitting 2 has been described, but the case in the present invention is not limited to this, and It is also possible to adopt a so-called assembling type case in which the end portion of the cable body C and the connection fitting 2 are housed in a molded container-shaped case.

Furthermore, in the embodiment of the present invention, an example in which the core wire Cb of the cable body C and the connecting fitting 12 are electrically connected by the crimping portion 12b has been described, but the present invention is not limited to this, and the core wire is not limited thereto. Cb may be soldered to the connecting fitting 12. In this case, an intermediate portion between the crimping portion 12a and the forming portion of the joining hole 12c in the connecting fitting 12 corresponds to the connecting portion in the present invention. In addition, since the connecting fitting 12 is smaller than the connecting fittings 62, 72 in the conventional signal cables 61, 61A, 71 because there is no portion corresponding to the banana plug portion, the connecting fitting 12 can be sufficiently used in a short time. As a result of being able to heat, the core wire Cb and the connecting fitting 1
2 can be reliably connected. Further, in the embodiment of the present invention, the signal cable 1 in which the connection fittings are attached to both ends of the cable body C has been described, but the present invention is not limited to this, and only one end of the cable body C is described. It can also be applied to a signal cable in which a connecting fitting is attached and the other end is directly connected to a measuring device or the like.

[0028]

As described above, according to the signal cable of the first aspect, the metal fitting body to be connected to the object to be connected and the connecting metal fitting on which the fixing crimping portion and the connecting portion are formed are caulked and joined. , The rivet connection, bolting, soldering, welding, and press fitting are used to form the connection fitting, so that when the cable body C is pulled, it is applied to the fixing crimp portion by the coating. Since the entire connection fitting is pulled by the force, even if the cable body is pulled, it is possible to avoid applying a force in a direction of peeling from the connection fitting to the core wire. Therefore, it is possible to prevent the connection failure between the core wire and the connection fitting due to the pulling of the cable body. In addition, since the connecting metal fittings can be used in common as connecting metal fittings for various signal cables, it is possible to use these cable with metal fittings by prefabricating cables with metal fittings with connecting metal fittings attached to both ends of the cable body. As a result, the manufacturing cost of various signal cables can be sufficiently reduced. Further, when the metal fitting body and the connecting metal fitting are joined together, the cable body is positioned with respect to the metal fitting body by the connecting metal fitting, so that when molding the case with a mold, the cable body is rattled in the mold. As a result, the case can be prevented from being molded with the cable body being biased.

Further, according to the signal cable of the second aspect, the connecting portion is constituted by the connecting crimp portion which is crimped to the core wire and electrically connects the connecting fitting to the core wire. Compared to the signal cable in which the connecting fitting is connected, the connecting fitting (connecting fitting) and the core wire can be connected reliably in a short time.

Further, according to the signal cable of the third aspect, the case is molded with the insulating material so as to be in close contact with the end portion of the cable body and the end portion of the connection fitting. Since the end portion of the cable main body, the connecting metal fitting and the metal fitting main body can be integrally fixed, even if the cable main body is pulled, it is possible to prevent the cable main body from being peeled off from the connecting metal fitting.

Further, according to the signal cable of the fourth aspect, the caulking joining convex portion inserted through the joining hole is caulked to join the metal fitting body and the connecting metal fitting to each other. In comparison, the metal fitting body and the connecting metal fitting can be joined easily in a short time. In addition, since looseness and peeling of the joining portion are unlikely to occur, the good connection state of the metal fitting body and the connecting metal fitting can be maintained for a long period of time. Further, as the connecting metal fitting, an inexpensive crimp terminal which is distributed in a large amount in the market can be used. As a result, the manufacturing cost of the signal cable can be sufficiently reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a configuration of a signal cable 1 according to an embodiment of the present invention.

FIG. 2 is a fitting main body 11 and a connecting fitting 12 of the connecting fitting 2.
FIG. 6 is a perspective view showing an end portion of the cable body C.

3A and 3B are views for explaining the method of manufacturing the signal cable 1, where FIG. 3A is a side view showing a state in which the connecting metal fitting 12 is set at the end of the cable body C, and FIG. It is a figure.

FIG. 4 is a diagram for explaining a method of manufacturing the signal cable 1, wherein FIG. 4A is a side view showing a state in which the crimp portions 12a and 12b of the coupling fitting 12 are crimped to the coating Ca and the core wire Cb, (B) is a front view of the state.

FIG. 5 is a view for explaining a method for manufacturing the signal cable 1, in which a state in which the joining convex portion 11b of the fitting main body 11 is inserted into the joining hole 12c of the joining fitting 12 is partially sectioned. It is a side view.

FIG. 6 is a diagram for explaining a method of manufacturing the signal cable 1, in which the caulking jig P is used to join the convex portions 1 for joining.
1B is a side view in which a state in which the metal fitting body 11 and the joining hole 12c are caulked and joined by crushing 1b is partially sectioned.

FIG. 7 is a plan view of a fitting-equipped cable Cx in which connecting fittings 12 are attached to both ends of the cable body C, respectively.

FIG. 8 is a signal cable 2 according to another embodiment of the present invention.
It is sectional drawing which shows the structure of 1.

FIG. 9 is a cross-sectional view showing a configuration of a connecting fitting 30 according to another embodiment of the present invention.

FIG. 10 is a connection fitting 40 according to another embodiment of the present invention.
3 is a cross-sectional view showing the configuration of FIG.

FIG. 11 is a connection fitting 50 according to another embodiment of the present invention.
It is sectional drawing which shows the structure of A.

FIG. 12 is a cross-sectional view showing a configuration of a connection fitting 50B according to still another embodiment of the present invention.

FIG. 13 is a sectional view showing the configuration of a conventional signal cable 61.

FIG. 14 is a sectional view showing a configuration of a conventional signal cable 71.

FIG. 15 is a cross-sectional view of a signal cable 61 in which a case 63 is formed in a state where the cable body C is biased.

FIG. 16 is a cross-sectional view showing a configuration of a conventional signal cable 61A.

FIG. 17 is a cross-sectional view of a signal cable 61A in which a case 63 is formed in a state where a crimping portion of a crimping ring 65 is displaced.

[Explanation of symbols]

1,21 Signal cable 2,30,40,50A, 50B Connection fitting 3,23 cases 11, 31, 41 Metal fitting body 11a connection part 11b Convex portion for joining 12 Connecting bracket 12a, 12b Crimping part 12c Bonding hole 31b Insertion hole 33 rivets 41b bolt hole 43 volts C cable body Ca coating Cb core wire P caulking jig R resin S solder

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Munenori Horiguchi             471 Obata, Kanara Town, Kanra District, Gunma Prefecture             In i corporation F-term (reference) 5E085 BB02 BB12 BB30 CC03 DD01                       DD03 DD07 DD08 DD09 DD13                       DD14 DD17 EE02 EE05 FF01                       GG27 HH06 JJ18                 5G309 FA04 FA06

Claims (4)

[Claims] 1. A connection fitting that is attached to at least one end of a cable body whose core wire is covered with a coating to electrically connect the core wire to a connection target, and a connection portion of the cable body and the connection fitting. A signal cable including a case made of an insulating material for covering the connection fitting, wherein the connection fitting is a fitting main body to be connected to the connection object, and the connection fitting is crimped to the cover to connect the connection fitting to the cable main body. A metal fitting body formed with a fixing crimping portion for fixing to an end portion and a connecting portion electrically connected to the core wire to connect the metal fitting body to the end portion of the cable body; Caulking joint with connecting metal fittings,
A signal cable that is joined by rivet joining, bolting, soldering, welding, or press fitting. 2. The signal cable according to claim 1, wherein the connecting portion is a crimp portion for connection, which is crimped to the core wire to electrically connect the connecting fitting to the core wire. 3. The signal cable according to claim 1, wherein the case is molded with the insulating material so as to be in close contact with the end of the cable body and the end of the connection fitting. 4. The caulking joining convex portion for joining to the connecting metallic member is formed in the metal fitting body, and the joining metallic member has a joining hole through which the caulking joining convex portion can be inserted. The signal cable according to any one of claims 1 to 3, wherein the metal fitting body and the connecting metal fitting are joined by crimping the caulking joining convex portion formed and inserted into the joining hole.