JP2012048837A - Terminal crimp method and terminal crimp device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal crimp method capable of suppressing opening of a barrel due to spring-back after a pair of barrels installed in an external conductor terminal is crimped to a braided inverted porion on a shield cable.SOLUTION: In a terminal crimp method, a pair of barrels installed in one end of an external conductor terminal is inserted and caulked between a pressure applying surface of a crimper and a pressure receiving surface of an anvil vertically so as to be crimped to the outer periphery of a braided inverted portion in a shield cable. An engaging piece is formed to project at the tip of one barrel while an engaging hole is formed by notching at the tip of the other barrel. The pressure applying surface of the crimper has a cross-sectional shape of a semicircle portion and taper portions connected with both circular arc ends in the semicircular portion, and a press type is provided in a nested manner in the center of the semicircular portion. After the tip of each barrel is guided to the center of the semicircle portion in the pressure applying surface along the taper portions and the semicircle portion in the pressure applying surface, the engaging piece in one barrel is pressed by the press type to be fitted to the engaging hole in the other barrel.

Description

  The present invention relates to connection of a shield connector connected to a terminal portion of a shielded cable such as a coaxial cable having a single signal line or a shielded twisted pair cable having a plurality of signal lines, and more particularly, to a braid included in the shielded cable. The present invention relates to a terminal crimping method and a terminal crimping apparatus for crimping and connecting a barrel of an outer conductor terminal included in the terminal.

  In recent years, electrical signals transmitted to printed circuit boards for control mounted with electronic components and ICs (integrated circuits) incorporated in electrical devices of automobiles such as car navigation systems have been accelerated (increased in frequency). Circuit patterns formed on the printed circuit board are also densely packed and densified. Generally, a shielded cable is used to transmit such a high-frequency electrical signal. However, as the transmitted electrical signal is further increased in frequency, the shielded connector connected to the shielded cable is further increased. There is a growing demand for higher frequencies.

  An example of a shielded cable is what is called a coaxial cable. Commonly used coaxial cables are a signal line in which a plurality of strands such as copper wires are bundled with an insulator as a transmission path for electrical signals, etc. A braid of the nature and an insulating sheath covering the outer periphery of the braid are arranged coaxially, and the braid covers the outer periphery of the signal conductor without gaps and electromagnetically shields it.

  Usually, a shield connector connected to the end portion of a coaxial cable that transmits such a high-frequency signal has an inner conductor terminal that is connected to a signal conductor that transmits the high-frequency signal, and an inner conductor terminal that is connected to the braid. An outer conductor terminal covering the outer periphery and a dielectric having a predetermined relative dielectric constant interposed between the inner conductor terminal and the outer conductor terminal are provided, and the insulator and sheath of the end portion of the coaxial cable are peeled off. An inner conductor terminal and an outer conductor terminal are connected to the signal conductor and the braid that are taken and exposed, respectively.

  As an example of such a shield connector, for example, there is one disclosed in Patent Document 1 below. FIG. 14A shows a longitudinal section of the shield connector. As shown in the figure, the shield connector 100 is connected to a portion where the insulator Wb and the sheath We of the coaxial cable W are peeled off and the signal conductor Wa and the braid Wd are exposed. The inner conductor terminal 101 is crimped and connected to the signal conductor Wa via the barrel 101a, and the outer conductor terminal 103 is crimped and connected to the braided Wd via the braided barrels 103a and 103b. 102 is provided between both terminals. FIG. 14B shows a cross-sectional view of the braided barrels 103 a and 103 b of the outer conductor terminal 103.

  As shown in the drawing, the braided barrels 103a and 103b of the outer conductor terminal 103 are crimped onto the braided Wd by folding back the exposed braided Wd and crimping it onto the braided reversing portion Wf that covers the outer periphery of the sheath We terminal. In this case, the other braided barrel 103b is caulked over the one braided barrel 103a.

JP 2000-173725 A

  However, the braided barrels 103a and 103b crimped so that the tips overlap each other in this way are spring-backed (when the material is plastically deformed by applying a load and then unloaded, the original shape is obtained due to the elasticity of the material. As a result, the braided barrels 103a and 103b are opened, and the tightening force of the braided barrels 103a and 103b to the braided reversing portion Wf is reduced. As a result, the drawing strength of the coaxial cable W with respect to the shield connector 100 is reduced. There is a problem of lowering.

  Accordingly, the problem to be solved by the present invention is to provide a terminal crimping method and a terminal crimping method capable of suppressing the opening of the barrel due to the springback after the pair of barrels provided on the outer conductor terminal are crimped to the braided reversing part of the shield cable. Is to provide a device.

  In order to solve the above-described problems, the present invention provides a pair of barrels extending upward from the left and right end portions of the bottom plate provided at one end of the outer conductor terminal. The outer periphery of the braid reversing part that is folded and covered by the sheath terminal part of the shielded cable that covers the signal line with the conductive braid and the insulating sheath by being clamped by the pressure-receiving surface of the arranged anvil A terminal crimping method for crimping the pair of barrels to each other, wherein a locking piece protrudes from the tip of one barrel, and a locking hole is formed in the tip of the other barrel, The pressing surface of the crimper is formed such that the cross-sectional shape thereof has a semicircular portion and a tapered portion connected to both arc ends of the semicircular portion, and a pressing die slides in the vertical direction at the center of the semicircular portion. To be free The pressure receiving surface of the anvil is formed in a shape having an arc portion whose cross-sectional shape is smaller in arc angle than a semicircle, and each barrel along the taper portion and the semicircle portion of the pressurizing surface. A first step of guiding the tip of the pressure plate to the center of the semicircular portion of the pressure surface, and after the first step, the locking piece of one barrel is pressed by the pressing mold into the locking hole of the other barrel. A second step of fitting, and the pair of barrels are crimped to the outer periphery of the braided reversal portion with their tips locked together by sandwiching the pressure surface and the pressure receiving surface. Is a summary.

  According to the terminal crimping method having such a configuration, the first step of guiding the tip of each barrel to the center of the semicircular portion of the pressurizing surface along the tapered portion and semicircular portion of the pressurizing surface of the crimper; After the step, the second step of pressing the locking piece of one barrel by a pressing die provided in a nested manner in the center of the semicircular portion and fitting it into the locking hole of the other barrel, Since the pair of barrels are crimped to the outer periphery of the braided reversing part of the shielded cable with the tips locked together by sandwiching between the pressure surface and the pressure receiving surface, the opening of the barrel after crimping by a conventional springback is not caused. It is definitely prevented. Thereby, the fall of the clamping force to the braid inversion part by the barrel like the conventional can be suppressed, and the pulling-out strength of the shield cable with respect to a barrel can be improved rather than before.

  In order to solve the above-mentioned problem, another aspect of the present invention is to add a pair of barrels extending upward from the left and right end portions of the bottom plate provided at one end of the outer conductor terminal to add a crimper disposed upward. A braid that folds the braid over the sheath end of a shielded cable that covers the signal line with a conductive braid and an insulating sheath by clamping between the pressure surface and the pressure-receiving surface of the anvil disposed below A terminal crimping method in which the pair of barrels are crimped to the outer periphery of the reversing portion, wherein a bent piece projects from the tip of one barrel and a projection projects from the tip of the other barrel. The pressure surface of the crimper is formed such that the cross-sectional shape thereof has a semicircular portion and a tapered portion connected to both arc ends of the semicircular portion, and a pressing die is vertically arranged at the center of the semicircular portion. Free to slide in the direction The pressure-receiving surface of the anvil is formed in a shape having an arc portion whose cross-sectional shape is smaller than the semicircle, and each of the pressure-receiving surface of the anvil along the tapered portion and the semicircle portion of the pressurizing surface. A first step of guiding the tip of the barrel to the center of the semicircular portion of the pressure surface; and after the first step, the bent piece of one barrel is pressed by the pressing mold to A second step of bending upward, and the pair of barrels are crimped to the outer periphery of the braided reversing portion with their tips locked together by being sandwiched between the pressure surface and the pressure receiving surface. Is a summary.

  According to the terminal crimping method having such a configuration, the first step of leading the tip of each barrel to the center of the semicircular portion of the pressurizing surface along the tapered portion and the semicircular portion of the pressurizing surface of the crimper, And a second step of pressing the bent piece of one barrel by a pressing die provided in a nested manner in the center of the semicircular portion and bending it on the protruding portion of the other barrel. Since the pair of barrels are crimped to the outer periphery of the braided reversing part with their tips locked together by sandwiching the pressure surface and the pressure receiving surface, it is possible to prevent the barrel from being opened after being crimped by a conventional spring back. Yes. Thereby, the fall of the clamping force to the braid inversion part by the barrel like the conventional can be suppressed, and the pulling-out strength of the shield cable with respect to a barrel can be improved rather than before.

  Furthermore, in order to solve the above-mentioned problems, the present invention provides a pair of barrels extending upward from the left and right ends of the bottom plate provided at one end of the outer conductor terminal, and a pressure surface of the crimper disposed above. Braid reversal part that covers the signal line by covering the signal line with a conductive braid and an insulating sheath and folding the braid back on the sheath end of the shield cable. A terminal crimping device for crimping the pair of barrels to the outer periphery of the barrel, wherein a locking piece protrudes from the tip of one barrel and a locking hole is formed in the tip of the other barrel. The pressure surface of the crimper is formed such that the cross-sectional shape thereof has a semicircular portion and a tapered portion connected to both arc ends of the semicircular portion, and a pressing die is provided at the center of the semicircular portion in the vertical direction. Can slide freely The pressure receiving surface of the anvil is formed in a shape having a circular arc portion whose cross-sectional shape is smaller than the semicircle, and each barrel along the tapered portion and the semicircular portion of the pressure surface. The pair of barrels are guided by pressing the locking piece of one barrel with the pressing die and fitting it into the locking hole of the other barrel. The gist of the invention is that it is crimped to the outer periphery of the braided reversing portion in a state in which the tips are locked.

  According to the terminal crimping device having such a configuration, after the tip of each barrel is guided to the center of the semicircular portion of the pressurizing surface along the tapered portion and the semicircular portion of the pressurizing surface of the crimper, A pair of barrels are shielded with their tips locked together by pressing the locking piece of one barrel into a locking hole of the other barrel by pressing the locking piece provided in a nested manner. Since the crimping is performed on the outer periphery of the braided reversing portion, the opening after the barrel is crimped by the spring back as in the prior art is reliably prevented. Thereby, the fall of the clamping force to the braid inversion part by the barrel like the conventional can be suppressed, and the pulling-out strength of the shield cable with respect to a barrel can be improved rather than before.

  In order to solve the above-mentioned problem, another aspect of the present invention is to add a pair of barrels extending upward from the left and right end portions of the bottom plate provided at one end of the outer conductor terminal to add a crimper disposed upward. A braid that folds the braid over the sheath end of a shielded cable that covers the signal line with a conductive braid and an insulating sheath by clamping between the pressure surface and the pressure-receiving surface of the anvil disposed below A terminal crimping apparatus for crimping the pair of barrels to the outer periphery of the reversing portion, wherein a bent piece projects from the tip of one barrel and a projection projects from the tip of the other barrel. The pressure surface of the crimper is formed such that the cross-sectional shape thereof has a semicircular portion and a tapered portion connected to both arc ends of the semicircular portion, and a pressing die is vertically arranged at the center of the semicircular portion. Free to slide in the direction The pressure-receiving surface of the anvil is formed in a shape having an arc portion whose cross-sectional shape is smaller than the semicircle, and each of the pressure-receiving surface of the anvil along the tapered portion and the semicircle portion of the pressurizing surface. After guiding the tip of the barrel to the center of the semicircular portion of the pressure surface, the pair of barrels is bent by pressing the bent piece of one barrel with the pressing die and bending it on the protruding portion of the other barrel. The gist of the invention is that it is crimped to the outer periphery of the braided reversing portion in a state in which the tips are locked.

  According to the terminal crimping device having such a configuration, after the tip of each barrel is guided to the center of the semicircular portion of the pressurizing surface along the tapered portion and the semicircular portion of the pressurizing surface of the crimper, The pair of barrels is inverted with the tip end locked by pressing the bent piece of one barrel with a pressing mold provided in a nested manner and bending it on the protruding part of the other barrel. Since it is crimped to the outer periphery of the part, the opening after the crimping of the barrel by the spring back as in the prior art is reliably prevented. Thereby, the fall of the clamping force to the braid inversion part by the barrel like the conventional can be suppressed, and the pulling-out strength of the shield cable with respect to a barrel can be improved rather than before.

  According to the terminal crimping method and the terminal crimping apparatus according to the present invention, the pair of barrels are crimped to the outer periphery of the braided reversing portion in a state where their tips are locked to each other. Later opening is reliably prevented. As a result, it is possible to suppress a decrease in the tightening force to the braid reversal portion by the barrel as in the conventional case, and to improve the pull-out strength of the shield cable with respect to the barrel as compared with the conventional case.

It is the figure which showed schematic structure of the shield connector to which the terminal crimping method and the terminal crimping apparatus which concern on the 1st Embodiment of this invention are applied, (a) is sectional drawing which looked at the shield connector from the side, (b ) Is a sectional view of (a) viewed from the opposite side. It is the figure which showed schematic structure of the crimper and anvil which crimps | bonds the braid barrel with which the shield connector of FIG. 1 is equipped to the braid inversion part of a coaxial cable. It is the figure which showed the state which the press type | mold provided in the crimp type of the crimper of FIG. 2 fell. It is the figure which showed the procedure which crimps | bonds a braided barrel to a braid inversion part using the crimper and anvil of FIG. It is the figure which showed the next procedure of FIG. It is the figure which looked at the braided barrel after crimping from above. It is the figure which showed the modification of the latching structure of the braided barrel tips of FIG. (A) is a view showing a state in which the locking piece is fitted in the back side of the locking hole from the state of FIG. 7, and (b) is a front side of the locking hole from the state of FIG. It is the figure which showed the state made to fit in. It is the figure which showed schematic structure of the shield connector to which the terminal crimping method and the terminal crimping apparatus which concern on the 2nd Embodiment of this invention are applied, (a) is sectional drawing which looked at the shield connector from the side, (b ) Is a sectional view of (a) viewed from the opposite side. It is the figure which showed schematic structure of the crimper and anvil which crimps | bonds the braid barrel with which the shield connector of FIG. 9 is equipped to the braid inversion part of a coaxial cable. It is the figure which showed the state which the press type | mold provided to the crimper of FIG. It is the figure which showed the procedure which crimps | bonds a braid barrel to a braid inversion part using the crimper and anvil of FIG. FIG. 13 is a diagram showing a procedure subsequent to FIG. 12. (A) is sectional drawing which showed schematic structure of the shield connector used conventionally, (b) is sectional drawing of the braided barrel part of (a).

  Embodiments of a terminal crimping method and a terminal crimping apparatus according to the present invention will be described below with reference to the drawings. First, a terminal crimping method and a terminal crimping apparatus according to a first embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the shield connector 1 has an inner conductor terminal 2 connected to a signal conductor Wa of the coaxial cable W at the end of the coaxial cable W, and the inner conductor terminal 2 is accommodated and held by a dielectric 5. The dielectric 5 is constituted by an outer conductor terminal 6 which is connected to the shield conductor Wd of the coaxial cable W.

  The coaxial cable W includes a signal conductor Wa in which a plurality of strands such as copper wires are twisted and bundled as a transmission path for electrical signals, a braid Wd in which a plurality of strands are knitted, and an intervening space between these conductors. The insulator Wb and the insulating sheath We covering the outer periphery of the braid Wd are coaxially arranged. The braid Wd covers the outer periphery of the signal conductor Wa without any gap, so that the signal conductor Wa Electromagnetically shielded.

  As shown in the figure, the coaxial cable W has a sheath We peeled for a predetermined length to expose a braid Wd, an exposed braid Wd is peeled for a predetermined length to expose an insulator Wb, and an exposed insulator Wb is exposed. Is peeled off for a predetermined length to expose the signal conductor Wa. In this case, the exposed braid Wd is folded back to form a braid reversal portion Wf that covers the sheath We terminal portion.

  The inner conductor terminal 2 of the shield connector 1 connected to the signal conductor Wa is formed by integrally bending a conductive plate material, has a so-called female terminal shape, and is a counterpart not shown. A terminal portion 3 connected to the male inner conductor terminal of the side connector is provided on the front side, and a crimping portion 4 connected to the signal conductor Wa of the coaxial cable W is provided on the rear side.

  As shown in FIG. 1, the terminal portion 3 of the inner conductor terminal 2 has a substantially cylindrical shape, and is provided with a pair of upper and lower elastic contact pieces 3 a and 3 a formed by being folded inside the terminal portion 3. ing. These elastic contact pieces 3a and 3a are elastically bent and deformable, and elastically when a tab portion of a male inner conductor terminal of a mating connector (not shown) is inserted between the elastic contact pieces 3a and 3a. The signal can be exchanged by contact. A locking piece 3b is provided on the upper surface of the terminal portion 3 so as to be elastically bent and deformable upward. The crimping portion 4 of the inner conductor terminal 2 is provided with a pair of left and right barrels 5 and 6 extending upward from the arc end of the bottom plate having an arcuate cross section, and on the outer periphery of the signal conductor Wa of the coaxial cable W. Barrels 5 and 6 are crimped and crimped together.

  The dielectric 7 that accommodates and holds the inner conductor terminal 2 is integrally formed in a substantially cylindrical shape with an insulating synthetic resin having a predetermined relative dielectric constant, and the inner conductor terminal 2 is formed by the dielectric 7. And the outer conductor terminal 8 are insulated. A terminal accommodating chamber 7a that opens in the front-rear direction is formed through the dielectric body 7, and the inner conductor terminal 2 is accommodated and held in the terminal accommodating chamber 7a.

  A locking hole 7b for locking the locking piece 3b of the inner conductor terminal 2 is formed in the ceiling surface behind the terminal accommodating chamber 7a, and the locking of the inner conductor terminal 2 is held in the locking hole 7b. When the piece 3b is locked, the inner conductor terminal 2 is held so as not to easily come out of the terminal accommodating chamber 7a. A lock protrusion 7 c is provided on the lower surface of the rear side of the dielectric 7 so as to protrude downward.

  The outer conductor terminal 8 in which the dielectric body 7 is housed is formed by integrally forming a conductive plate material by bending it, and the front part of the substantially cylindrical shell portion 9 in which the dielectric body 7 is housed. The crimping portion 10 connected to the braid Wd (braid reversing portion Wf) of the coaxial cable W is provided on the rear side.

  A stabilizer 9a inserted into a slit formed in the bottom surface of the housing portion of the connector housing is lowered below the front lower surface of the shell portion 9 when the outer conductor terminal 8 is housed in the housing portion of the connector housing (not shown). Is formed to protrude. This stabilizer 9a regulates the insertion direction of the outer conductor terminal 8 into the connector housing. Further, at the tip of the opening 9b generated by the formation of the stabilizer 9a, when the outer conductor terminal 8 is inserted into the connector housing, the guide 9c is guided by the bottom slit of the housing portion of the connector housing. Is formed in a tapered shape.

  A lock piece 9d that engages with a lock protrusion 7c protruding from the rear lower surface of the dielectric 7 is formed on the lower lower surface of the shell portion 9 so as to bend and deform upward. When the body 7 is inserted into the shell portion 9 of the outer conductor terminal 8 from the front, the dielectric 7 is held so as not to come off easily. Note that tongue-shaped contact pieces 9e, 9e that elastically contact the outer wall of the outer conductor terminal of the mating connector are formed on the left and right side walls of the shell portion 9 (see FIG. 6).

  The crimping portion 10 of the outer conductor terminal 8 is provided with a pair of braided barrels 11 and 12 having a strip shape extending upward from the left and right ends of the bottom plate 10a having a circular arc shape in cross section. In this case, the braided barrels 11 and 12 in the figure show a state before being crimped to the braided reversing portion Wf.

  As shown in FIG. 1B, an inverted trapezoidal locking piece 11b protrudes from the tip 11a of one braided barrel 11, and the other braided barrel 12 is shown in FIG. 1A. A trapezoidal locking hole 12b is cut out at the tip 12a.

  In this case, when the braided barrel 12 is caulked by the crimping device 20 to be described later, the locking hole 12b is positioned above the uppermost portion of the braid reversing portion Wf. 1 (a) and 1 (b), the leading end 12a of the braided barrel 12 provided with the locking hole 12b is positioned above the leading end 11a of the braided barrel 11 provided with the locking piece 11b. ing.

  Further, a protrusion 10b is formed at the center of the bottom plate 10a of the crimping part 10 on which the braid reversing part Wf is placed so as to protrude inward, and the braided barrels 11 and 12 to the braid reversing part Wf are provided. After crimping, the tip of the protrusion 10b bites into the braid reversing part Wf and the sheath We.

  FIG. 2 shows that the braided barrel 11 provided with the locking piece 11b and the braided barrel 12 provided with the locking hole 12b are caulked in a circular shape, and the locking piece 11b is fitted into the locking hole 12b. The schematic configuration of the crimping device 20 is shown in which the ends of the braided barrels 11 and 12 are locked to each other and the braided barrels 11 and 12 are crimped to the outer periphery of the braided reversing portion Wf.

  As shown in the drawing, the crimper 21 included in the crimping device 20 includes a semicircular semicircular portion 22a whose cross-sectional shape is open downward, and a downwardly extending tapered portion 22b that is gently connected to the arc end of the semicircular portion 22a. , 22b is formed. In this case, the lower end of the right tapered portion 22b is positioned below the lower end of the left tapered portion 22b.

  Further, a mold insertion hole 21b penetrating vertically is formed in a region from the slightly left side of the center of the semicircular portion 22a of the pressurizing surface 22 to the middle portion of the right tapered portion 22b, and the mold insertion hole 21b is formed in the mold insertion hole 21b. The pressing die 25 is provided in a nested manner. The pressing die 25 is inserted into the die insertion hole 21b so as to be slidable up and down. In this case, the pressing surface 26 at the lower end of the pressing die 25 is formed in a shape that coincides with a part of the semicircular portion 22 a of the pressing surface 22.

  The upper end portion of the crimper 21 and the upper end portion of the pressing die 25 are held in a storage portion 27 a formed inside the crimper holder 27.

  As shown in the figure, the crimper 21 is slidably inserted vertically into a crimper insertion hole 27b communicating with the accommodating portion 27a from the lower surface of the crimper holder 27, and a pair of flange portions 21a, 21a is placed on the lower surface of the accommodating portion 27a. In this case, two shafts 28 and 28 are rotatably inserted on both the left and right sides of the upper surface of the accommodating portion 27a so that the lower half of the cross section faces the accommodating chamber 27a. The shaft 28 has a cut-out circular cross-sectional shape having a flat portion 28a on the upper side. Therefore, since the upper surface and the lower surface of the flange portion 21a of the crimper 21 are sandwiched between the outer peripheral surface on the opposite side of the flat surface portion 28a on the shaft 28 and the lower surface of the housing portion 27a, the positioning is fixed. As the crimper holder 27 moves up and down, the crimper 21 can move up and down. The crimper holder 27 is connected to a pressing means (not shown).

  A pair of flange portions 25 a and 25 a formed at the upper end of the pressing die 25 are fixed to the upper surface of the accommodating portion 27 a of the crimper holder 27, and can move up and down as the crimper holder 27 moves up and down. It is possible.

  In this case, as shown in FIG. 3, when the shaft 28 is rotated 180 degrees from the state shown in FIG. 2, and the flat portion 28 a is on the lower side, only the pressing die 25 is moved further than the crimper 21 by the crimper holder 27. A predetermined stroke can be lowered downward.

  In addition, the anvil 23 provided in the crimping device 20 is formed with a pressure receiving surface 24 having an arc portion 24a having a smaller arc angle than a semicircle whose cross-sectional shape is open upward.

  Next, using FIG. 4 and FIG. 5, the braided barrel 11 provided with the locking piece 11b and the braided barrel 12 provided with the locking hole 12b are placed on the outer periphery of the braid reversing portion Wf by the crimper 21 and the anvil 23. The procedure for pressure bonding will be described.

  As shown in FIG. 4 (a), when the crimper 21 descends from above the crimping portion 10 where the braid reversing portion Wf is placed on the upper surface of the bottom plate 10a, the tip of the braid barrel 11 provided with the locking piece 11b. 11a is bent inward along the right tapered portion 22b, and the tip 12a of the braided barrel 12 provided with the locking hole 12b is bent inward along the left tapered portion 22b. At this time, the locking piece 11b of the braided barrel 11 is brought into a state where it faces the mold insertion hole 21b.

  Next, as shown in FIG. 4 (b), when the crimper 21 is further lowered, the tip 11a of the braided barrel 11 is substantially upright at a position that does not reach the semicircular portion 22a above the right tapered portion 22b. The tip 12a of the braided barrel 12 reaches the semicircular portion 22a and is further bent inward from the upright state along the semicircular portion 22a. Also at this time, the locking piece 11b of the braided barrel 11 remains facing the mold insertion hole 21b.

  Next, as shown in FIG. 5A, when the crimper 21 is lowered to the lowest point position, the leading end 11a of the braided barrel 11 is guided to the right position at the center of the semicircular portion 22a, and the braided barrel 12 The leading end 12a is guided to the right position beyond the center of the semicircular portion 22a. At this time, the locking piece 11b of the braided barrel 11 faces the mold insertion hole 21b below the pressing surface 26 of the pressing mold 25, and the locking hole 12b is diagonally right above the locking hole 12b of the braided barrel 12. It is arranged so that it can be fitted in.

  Then, when the shaft 28 is rotated 180 degrees and only the pressing die 25 is lowered further below the crimper 21 by the crimper holder 27 in a state where the flat portion 28a is on the lower side, as shown in FIG. Further, the locking piece 11b is pressed downward by the pressing surface 26 and is fitted into the locking hole 11b.

  As a result, as shown in FIG. 6, the braided barrels 11 and 12 are caulked in a circular shape, and the braid reversing portion Wf with the leading ends 11a and 12a locked by the locking pieces 11b and the locking holes 12b. It will be crimped to the outer periphery of. In this way, the pair of braided barrels 11 and 12 are crimped to the outer periphery of the braid reversing portion Wf of the coaxial cable W in a state where the tips 11a and 12a are locked to each other. Later opening is reliably prevented. Thereby, the fall of the clamping force to the braid inversion part by the conventional barrel is suppressed, and the pulling-out strength of the coaxial cable with respect to a barrel is improving rather than the past.

  FIG. 7 is a view showing a modified example of the locking piece 11b and the locking hole 12b described above. In this case, a plurality of notched groove portions 11 c cut into a triangular shape are formed at the front end and the rear end of the locking piece 11 b so as to be equally spaced along the longitudinal direction of the braided barrel 11. Further, a plurality of claw portions 12c protruding in a triangular shape are formed at the front end and the rear end of the locking hole 12b, respectively, along the longitudinal direction of the braided barrel 12 so as to be equally spaced at the same interval as the notch groove 11c. Yes.

  Thus, the notch groove 11c is formed in the locking piece 11b, and the claw portion 12c is formed in the locking hole 12b, so that the fitting position of the locking piece 11b in the locking hole 12b is, for example, the state shown in FIG. Can be changed to the state shown in FIGS. 8 (a) and 8 (b). In this case, FIG. 8 (a) shows a state in which the locking piece 11c is fitted in the locking hole 12b on the back side from the state of FIG. 7, and FIG. 8 (b) shows the locking piece 11c. Is shown in a state closer to the locking hole 12b than the state of FIG. Thus, the height of the braided barrels 11 and 12 after crimping, that is, the crimp height can be adjusted by changing the position where the locking piece 11c is fitted into the locking hole 12b. Usually, since the dimensional tolerance of the outer diameter of the coaxial cable W is larger than the dimensional tolerance of the braided barrels 11 and 12, the braided barrel 11 and the post-crimped barrels 11 and 12 are capable of absorbing such variations in the outer diameter of the coaxial cable W. Twelve crimp heights can be adjusted.

  Next, a terminal crimping method and a terminal crimping apparatus according to a second embodiment of the present invention will be described with reference to FIGS. In addition, about the same structure as 1st Embodiment mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted and it demonstrates centering on a different point.

  As shown in FIG. 9, the braided barrels 11 and 12 provided in the crimping part 10 have different tip shapes from the braided barrels 11 and 12 shown in FIG. 1. In this case, as shown in FIG. 9B, a bent piece 11d having an L-shaped cross section is provided at the tip 11a of the braided barrel 11 so as to protrude outward, as shown in FIG. 9A. Further, a protrusion 12d is provided at the tip 12a of the braided barrel 12 so as to protrude outward.

  FIG. 10 shows the braided barrel 11 provided with such a bent piece 11d and the braided barrel 12 provided with the protruding portion 12d in a circular shape, and the tip of the bent piece 11d is placed on the protruding portion 12d. The schematic structure of the crimping | compression-bonding apparatus 30 which bend | folds and latches the front-end | tips of the braided barrels 11 and 12 and crimps | bonds the braided barrels 11 and 12 to the outer periphery of the braid inversion part Wf is shown.

  As shown in the figure, the crimper 31 included in the crimping device 30 includes a semicircular semicircular portion 32a whose cross-sectional shape is open downward, and a downwardly extending tapered portion 32b that is gently connected to the arc end of the semicircular portion 32a. , 32b is formed.

  In addition, a mold insertion hole 31b penetrating vertically is formed in a region from the middle portion of the left tapered portion 32b of the pressing surface 32 to the middle portion of the right tapered portion 32b through the semicircular portion 32a. A pressing die 35 is provided in a nested manner in the die insertion hole 31b. The pressing die 35 is inserted into the die insertion hole 31b so as to be slidable up and down. In this case, the central portion of the pressing surface 36 at the lower end of the pressing die 35 is formed in a shape that coincides with a part of the semicircular portion 32 a of the pressing surface 32. In addition, a concave portion 36 a is formed in the center of the pressing surface 36 of the pressing die 35 so as to be recessed upward in a semicircular cross section.

  The upper end portion of the crimper 31 and the upper end portion of the pressing die 35 are held in a storage portion 37 a formed inside the crimper holder 37.

  As shown in the drawing, the crimper 31 is inserted from the lower surface of the crimper holder 37 into a crimper insertion hole 37b communicating with the accommodating portion 37a so as to be slidable up and down, and a pair of flange portions 31a, 31a is placed on the lower surface of the accommodating portion 37a. In this case, two shafts 38, 38 are rotatably inserted on the left and right sides of the upper surface of the housing portion 37a so that the lower half of the section faces the housing chamber 37a. The shaft 38 has a cut-out circular cross-sectional shape having a flat portion 38a on the upper side. Therefore, since the upper surface and the lower surface of the flange portion 31a of the crimper 31 are sandwiched and fixed between the outer peripheral surface opposite to the flat portion 28a on the upper side of the shaft 38 and the lower surface of the housing portion 37a, As the crimper holder 37 is moved up and down, the crimper 31 can move up and down. The crimper holder 37 is connected to a pressurizing means (not shown).

  The pair of flange portions 35 a and 35 a formed at the upper end of the pressing die 35 are fixed to the upper surface of the accommodating portion 37 a of the crimper holder 37 and can move up and down as the crimper holder 37 moves up and down. It is possible.

  In this case, as shown in FIG. 11, when the shaft 38 is rotated 180 degrees from the state shown in FIG. 10 and the flat surface portion 38 a is placed on the lower side, only the pressing die 35 is moved further than the crimper 31 by the crimper holder 37. A predetermined stroke can be lowered downward.

  The anvil 33 provided in the crimping device 30 is formed with a pressure receiving surface 34 having an arc portion 34a having a smaller arc angle than a semicircle whose cross-sectional shape is open upward.

  Next, using FIG. 12 and FIG. 13, the braided barrel 11 provided with the bent piece 11d and the braided barrel 12 provided with the projecting portion 12d are crimped to the outer periphery of the braid reversing portion Wf by the crimper 31 and the anvil 33. The procedure to make is explained.

  As shown in FIG. 12 (a), when the crimper 31 descends from above the crimping portion 10 where the braid reversing portion Wf is placed on the upper surface of the bottom plate 10a, the tip of the braid barrel 11 provided with the bent piece 11d. 11a is bent inward along the right tapered portion 32b, and the tip 12a of the braided barrel 12 provided with the protrusion 12d is bent inward along the left tapered portion 32b. At this time, the bent piece 11d of the braided barrel 11 and the projection 12d of the braided barrel 12 are brought into a state of facing the mold insertion hole 31b.

  Next, as shown in FIG. 12 (b), when the crimper 31 is further lowered, the tip 11a of the braided barrel 11 is substantially upright at a position reaching the semicircular portion 32a above the right tapered portion 32b. At the same time, the tip 12a of the braided barrel 12 is bent substantially upright at a position reaching the semicircular portion 32a and the semicircular portion 22a above the left tapered portion 32b. Also at this time, the bent piece 11d of the braided barrel 11 and the protrusion 12d of the braided barrel 12 remain in a state of facing the mold insertion hole 31b.

  Next, as shown in FIG. 13 (a), when the crimper 31 is lowered to the lowest point position, the leading end 11a of the braided barrel 11 is guided to the center of the semicircular portion 32a, and the leading end of the braided barrel 12 is also the same. 12a is led to the center of the semicircular portion 22a. At this time, the bent piece 11d of the braided barrel 11 and the projection 12d of the braided barrel 12 face the mold insertion hole 31b below the concave portion 36a provided in the pressing surface 36, and the tip of the bent piece 11d. The protrusion 12d is arranged on the lower side.

  Then, when the shaft 38 is rotated 180 degrees and only the pressing die 35 is lowered further below the crimper 31 by the crimper holder 37 with the flat surface portion 38a on the lower side, FIG. 13B shows. In this way, the tip of the bent piece 11d of the braided barrel 11 is bent so as to exceed the protrusion 12d of the braided barrel 12 by the downward pressing by the concave portion 36a provided in the center of the pressing surface 36.

  As a result, the braided barrels 11 and 12 are caulked in a circular shape, and the tips 11a and 12a are crimped to the outer periphery of the braided reversing portion Wf in a state where the tips 11a and 12a are locked by the bent pieces 11d and the protrusions 12d. Become. In this way, the pair of braided barrels 11 and 12 are crimped to the outer periphery of the braid reversing portion Wf of the coaxial cable W in a state where the tips 11a and 12a are locked to each other. Later opening is reliably prevented. Thereby, the fall of the clamping force to the braid inversion part by the conventional barrel is suppressed, and the pulling-out strength of the coaxial cable with respect to a barrel is improving rather than the past.

  As mentioned above, although the embodiment of the terminal crimping method and the terminal crimping apparatus according to the present invention has been described, the present invention is not limited to these examples at all, and various embodiments are within the scope not departing from the gist of the present invention. Of course, it can be implemented. For example, in the above embodiment, the case where the present invention is applied to a coaxial cable having one signal line has been described. However, the present invention can also be applied to a shielded cable such as a shielded twisted pair cable having a plurality of signal lines. The number of signal lines provided in the shielded cable is not limited. Needless to say, the shield connector can be applied to both male and female connectors.

1: Shield connector 2: Inner conductor terminal 7: Dielectric 8: Outer conductor terminal 9: Shell part 10: Crimp part 10a: Bottom plate 11, 12: Braided barrel 11a, 12a: Tip 11b: Locking piece 11c: Notch groove 11d : Bending piece 12b: Locking hole 12c: Claw part 12d: Protruding part 20: Crimping device 21: Crimper 21b: Mold insertion hole 22: Pressurizing surface 22a: Semicircular part 22b: Tapered part 23: Anvil 24: Pressure receiving surface 24a : Arc part 25: Pressing die 26: Pressing surface 27: Crimper holder 27a: Housing part 27b: Crimper insertion hole 28: Shaft 28a: Flat part 30: Crimping device 31: Crimper 31b: Mold insertion hole 32: Pressurizing surface 32a: Half Circular part 32b: Tapered part 33: Anvil 34: Pressure receiving surface 3 4a: Arc part 35: Pressing type 36: Pressing surface 36a: Recessed part 37: Crimper holder 37a: Housing part 37b: Crimper insertion hole 38: Shaft 38a: Flat part W: Coaxial cable Wa: Signal conductor Wb: Insulator Wd: Braided We: Sheath Wf: Braid reversing part

Claims (4)

  A pair of barrels extending upward from the left and right end portions of the bottom plate provided at one end of the outer conductor terminal is sandwiched between the pressure surface of the crimper disposed above and the pressure surface of the anvil disposed below. Terminal crimping that crimps the pair of barrels onto the outer periphery of the braided reversal part that is folded over the sheath end of a shielded cable that covers the signal line with a conductive braid and an insulating sheath. A locking piece protrudes from the tip of one barrel, and a locking hole is formed in the tip of the other barrel, and the pressure surface of the crimper has a half cross-sectional shape. It is formed in a shape having a circular portion and a tapered portion connected to both arc ends of the semicircular portion, and is provided in a nested manner at the center of the semicircular portion so that the pressing die can slide in the vertical direction. The anvil The pressure receiving surface is formed in a shape having a circular arc portion whose cross-sectional shape is smaller in arc angle than a semicircle, and the tip of each barrel is arranged along the tapered portion and the semicircular portion of the pressure surface. A first step that leads to the center; and a second step that, after the first step, presses the locking piece of one barrel with the pressing mold and fits into the locking hole of the other barrel. The terminal crimping method is characterized in that the pair of barrels are crimped to the outer periphery of the braided reversing portion in a state where the tips of the pair of barrels are locked with each other by being sandwiched between the pressure surface and the pressure receiving surface.   A pair of barrels extending upward from the left and right end portions of the bottom plate provided at one end of the outer conductor terminal is sandwiched between the pressure surface of the crimper disposed above and the pressure surface of the anvil disposed below. Terminal crimping that crimps the pair of barrels onto the outer periphery of the braided reversal part that is folded over the sheath end of a shielded cable that covers the signal line with a conductive braid and an insulating sheath. In this method, a bent piece protrudes from the tip of one barrel, and a protrusion protrudes from the tip of the other barrel, and the pressure surface of the crimper has a semicircular cross-sectional shape. Is formed in a shape having a tapered portion connected to both arc ends of the portion and the semicircular portion, and is provided in a nested manner in the center of the semicircular portion so that the pressing mold is slidable in the vertical direction, Of the anvil The pressure surface is formed in a shape having an arc portion whose cross-sectional shape is smaller in arc angle than a semicircle, and the tip of each barrel is centered along the tapered portion and the semicircle portion of the pressure surface. And a second step of pressing the bent piece of one barrel by the pressing die and bending it on the protruding portion of the other barrel after the first step, A terminal crimping method characterized in that the pair of barrels are crimped to the outer periphery of the braided reversal portion in a state in which the tips of the pair of barrels are locked together by sandwiching between the pressure surface and the pressure receiving surface.   A pair of barrels extending upward from the left and right end portions of the bottom plate provided at one end of the outer conductor terminal is sandwiched between the pressure surface of the crimper disposed above and the pressure surface of the anvil disposed below. Terminal crimping that crimps the pair of barrels onto the outer periphery of the braided reversal part that is folded over the sheath end of a shielded cable that covers the signal line with a conductive braid and an insulating sheath. A locking piece protrudes from the tip of one barrel, and a locking hole is formed in the tip of the other barrel. The pressure surface of the crimper has a half cross-sectional shape. It is formed in a shape having a circular portion and a tapered portion connected to both arc ends of the semicircular portion, and is provided in a nested manner at the center of the semicircular portion so that the pressing die can slide in the vertical direction. The anvil The pressure receiving surface is formed in a shape having a circular arc portion whose cross-sectional shape is smaller in arc angle than a semicircle, and the tip of each barrel is arranged along the tapered portion and the semicircular portion of the pressure surface. After guiding to the center, the pair of barrels are in a state in which the ends of the pair of barrels are locked by pressing the locking pieces of one barrel with the pressing mold and fitting them into the locking holes of the other barrel. A terminal crimping apparatus characterized by being crimped to the outer periphery of the braided reversing part.   A pair of barrels extending upward from the left and right end portions of the bottom plate provided at one end of the outer conductor terminal is sandwiched between the pressure surface of the crimper disposed above and the pressure surface of the anvil disposed below. Terminal crimping that crimps the pair of barrels onto the outer periphery of the braided reversal part that is folded over the sheath end of a shielded cable that covers the signal line with a conductive braid and an insulating sheath. In the apparatus, a bent piece protrudes from the tip of one barrel and a protrusion protrudes from the tip of the other barrel, and the pressure surface of the crimper has a semicircular cross-sectional shape. Is formed in a shape having a tapered portion connected to both arc ends of the portion and the semicircular portion, and is provided in a nested manner in the center of the semicircular portion so that the pressing mold is slidable in the vertical direction, Of the anvil The pressure surface is formed in a shape having an arc portion whose cross-sectional shape is smaller in arc angle than a semicircle, and the tip of each barrel is centered along the tapered portion and the semicircle portion of the pressure surface. Then, the pair of barrels is held in a state in which the pair of barrels are locked with each other by pressing the bent piece of one barrel with the pressing die and bending it on the protruding portion of the other barrel. A terminal crimping device characterized by being crimped to the outer periphery of the reversing part.

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