JP2009187744A - Electric wire fuse, and mounting method of low-pressure lead-in wire for electric wire fuse - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To fasten a lead wire finally by compressing a compression terminal without requiring a work to peel the covering of the lead wire to expose the core wire and without removing the terminal cover from an insulation tube, and without giving a damage to the terminal cover, when mounting the lead wire being an low-pressure lead-in wire on an electric wire fuse. <P>SOLUTION: In the mounting method of the low-pressure lead-in wire on a wire fuse, the top end portion of a compression terminal 104 is exposed by deforming the top end side of a terminal cover 106 covering the compression terminal 104 extracted from an insulation tube 102 (see b), in that state, according to the operation of inserting the core wire 202 of a lead wire 201 into the compression terminal 104, the covering 203 is cut by a cutter 121 at the tip of the compression terminal 104 (see c), the deformed terminal cover 106 is returned to the original state and the compression terminal 104 is covered together with the cut covering 203 to temporarily fasten the lead wire 201 (see d), and the root side of the terminal cover 106 is deformed and the exposed compression terminal 104 is compressed to fasten the lead wire 201 finally, and thereafter the deformed terminal cover 106 is returned to the original state (see f). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electric wire fuse that is branched from a low-voltage distribution line and is connected to a low-voltage lead-in line that reaches a facility of an electric power consumer, and a method for mounting the low-voltage lead-in line on the electric wire fuse.

  Electricity is supplied to facilities of electric power consumers such as ordinary households, for example, houses by using a low-voltage service line branched from a low-voltage distribution line. Such a low-voltage lead-in wire is connected via an electric wire fuse for the purpose of short circuit and overcurrent protection. For example, as shown in Patent Document 1, a wire fuse has a pair of compression terminals (terminals in Patent Document 1) connected to both ends of a fuse element enclosed in an insulation cylinder, and these compression terminals are connected to an insulation cylinder. And is covered with a terminal cover (protective cap in Patent Document 1). A lead wire of a low-voltage lead wire is attached to the compression terminal.

  FIGS. 10A to 10E are front views showing a lead wire mounting process with respect to a compression terminal as an example of the prior art. The electric wire fuse 11 encloses a fuse element (not shown) inside the insulating cylinder 12. A pair of compression terminals 13 respectively connected to the fuse elements are drawn out from both ends of the insulating cylinder 12 (see FIGS. 10C and 10D). These compression terminals 13 are covered with a terminal cover 14.

  In order to attach the lead wire 15 to the electric wire fuse 11 (see FIG. 10A), the covering 16 of the lead wire 15 is peeled to expose the core wire 17 (see FIG. 10B). Then, the terminal cover 14 is removed from the insulating cylinder 12 and the lead wire 15 is inserted (see FIG. 10C). In this state, the core wire 17 of the lead wire 15 is inserted into the compression terminal 13 (see FIG. 10D). ). In this state, the compression terminal 13 into which the core wire 17 is inserted is compressed with a compression pliers (not shown) and crushed, and the core wire 17 is fixed to the compression terminal 13. At this time, it is necessary to temporarily fix the compression terminal 13 by crushing the compression terminal 13 with a general pliers (not shown) prior to crushing the compression terminal 13 with the compression pliers. Then, as shown in FIG. 10E, the terminal cover 14 is returned to the original state, whereby the attachment of the lead wire 15 to the wire fuse 11 is completed.

  Patent Document 2 describes an invention in which a terminal cover (covered in Patent Document 2) is formed of a hard insulating material, and its tip is closed with a soft retaining plug. The stopper plug is pierced when the lead wire core is inserted, and acts as a temporary stopper by applying a reaction force that the pierced portion tries to return to the core wire (see paragraph 0011 above). ).

Japanese Patent Application Laid-Open No. 07-182964 Japanese Patent Laid-Open No. 08-064108

  When attaching a lead wire to be a low-voltage lead wire to an electric wire fuse, it is indispensable to remove the coating of the lead wire and expose the core wire. In this work, since a knife such as a knife must be used, a careful work is required, and there is a problem that it takes time and the work load on the worker is large.

  Further, when attaching the lead wire 15 to the compression terminal 13 illustrated in FIGS. 10A to 10E, it is necessary to remove the terminal cover 14 from the insulating cylinder 12 and attach it to the lead wire 15 side. Yes (see FIG. 10C). At this time, the terminal cover 14 may be forgotten to be attached to the lead wire 15, and in this case, an additional measure for insulation by taping or the like is required for the portion of the compression terminal 13 to which the lead wire 15 is attached. End up. In addition, prior to the main stop for crushing the compression terminal 13 with compression pliers, the compression terminal 13 must be crushed and temporarily fixed with a general pliers (not shown), which increases the number of work steps. In this respect, the electric wire fuse described in Patent Document 2 does not cause these problems, but compresses the compressed terminal together with the terminal cover (see paragraph 0014 and FIG. 7), so that the terminal cover is damaged and insulated. Expected to be impossible.

  An object of the present invention is to eliminate the need to strip the lead wire and expose the core wire when the lead wire serving as the low-voltage lead wire is attached to the electric wire fuse.

  Another object of the present invention is that the terminal cover is not removed from the insulating cylinder, the lead terminal is not temporarily fixed by crushing the compressed terminal with pliers, and the terminal cover is not damaged. The lead wire can be attached to the compression terminal.

  The electric wire fuse of the present invention includes an insulating tube, a fuse element enclosed in the insulating tube, and a lead wire with a sheath that is connected to both ends of the fuse element and drawn out from the insulating tube, and is a low-voltage lead wire. A pair of compression terminals having a hollow structure that allows insertion of a core wire, a terminal cover that covers the compression terminal and that can be exposed by deformation of both a root portion and a tip portion thereof, and the compression that is covered by the terminal cover A cutter provided at a tip of a terminal, having a blade portion at a position where the coating abuts in accordance with an insertion operation of the core wire of the lead wire with respect to the compression terminal, and cutting the coating in accordance with the insertion operation of the core wire; .

  The electric wire fuse of the present invention viewed from another aspect includes an insulating cylinder, a fuse element sealed in the insulating cylinder, and connected to both ends of the fuse element and drawn from the insulating cylinder. A pair of compression terminals having a hollow structure that allows insertion of a core wire of a certain coated lead wire, and provided at the tip of the compression terminal, the coating is applied according to the insertion operation of the core wire of the lead wire with respect to the compression terminal. A blade portion is provided at a position where it comes into contact, and a cutter that cuts the coating in accordance with the insertion operation of the core wire covers a tip portion of the compression terminal with a space between the compression terminal and covers the root portion. And a terminal cover that can be exposed by deformation.

  The method of mounting the low-voltage lead wire to the electric wire fuse of the present invention is such that the distal end side of the terminal cover that covers the compression terminal having a hollow structure connected to the end of the fuse element enclosed in the insulating cylinder and drawn out from the insulating cylinder And the core wire of the covered lead wire which is a low-voltage lead-in wire is inserted into the compression terminal from which the tip portion is exposed, and the coating is applied according to the insertion operation. Cutting the covering with a cutter having a blade provided at the tip of the compression terminal with which the terminal contacts, and the compression terminal together with the cut covering by returning the deformed tip side of the terminal cover And temporarily fixing the lead wire, and deforming the base side of the terminal cover to compress the compressed terminal to which the lead wire is temporarily fixed to compress the lead wire. And a step of stopping, and a step of covering said compression pin by undoing the root side which is the deformation of the terminal cover.

  The method of mounting the low-voltage lead wire to the electric wire fuse of the present invention viewed from another aspect is a compression terminal having a hollow structure connected to the end of the fuse element enclosed in the insulating cylinder and drawn out from the insulating cylinder. On the other hand, inserting a core wire of a covered lead wire that is a low-voltage lead-in wire, and cutting the coating with a cutter having a blade portion provided at the tip of the compression terminal with which the coating abuts according to the insertion operation; In the process of cutting the covering, the lead covering is temporarily fixed by storing the cut covering in a compressed state in a gap formed between the terminal cover covering the compression terminal and the compression terminal. A step of deforming a base side of the terminal cover to compress the compressed terminal to which the lead wire is temporarily fixed to fix the lead wire, and a deformed root of the terminal cover. And a step of covering the compression terminals by undo the side.

  According to the present invention, since the coating is cut with the blade portion of the cutter provided at the tip of the compression terminal in accordance with the insertion operation of the lead wire serving as the low-voltage lead wire with respect to the compression terminal, the lead wire is attached to the wire fuse. When mounting, it is possible to eliminate the work of stripping the lead wire and exposing the core wire. In addition, the lead wire is temporarily fixed by covering the compression terminal with the cut cover and the tip end side of the terminal cover, and the base terminal side of the terminal cover is deformed to compress the compression terminal to which the lead wire is temporarily fixed. Since the lead wire is fixed permanently, the terminal cover is not removed from the insulation tube, and the lead wire is not temporarily fixed by crushing the compression terminal with pliers, and the terminal cover is damaged. The lead wire can be attached to the compression terminal without giving.

  A first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a front view of the electric wire fuse 101. In the electric wire fuse 101, a fuse element 103 (see FIG. 2) is sealed inside an insulating cylinder 102, and a pair of conductive compression terminals 104 (104a, 104b) connected to both ends of the fuse element 103 are connected to the insulating cylinder 102. It is configured to be drawn from the inside to the outside. A pair of protective caps 105 (105a, 105b) are attached to both ends of the insulating cylinder 102, and the compression terminals 104 (104a, 104b) protrude from the protective caps 105 (105a, 105b). The pair of compression terminals 104 (104a, 104b) are covered with a pair of terminal covers 106 (106a, 106b), respectively. These terminal covers 106 (106a, 106b) are attached to protective caps 105 (105a, 105b), respectively.

  FIG. 2 is a longitudinal front view of the electric wire fuse 101 in a state in which the lead wire 201 which is a low-voltage lead-in wire is attached. The insulating cylinder 102 has a double structure of a cylindrical inner cylinder 107 and an outer cylinder 108 formed of a transparent member. In both end regions of the inner cylinder 107 and the outer cylinder 108, a pair of intermediate cylinders 109 formed of a transparent member are provided so as to be interposed between the inner cylinder 107 and the outer cylinder 108. . By these intermediate cylinders 109, the inner cylinder 107 and the outer cylinder 108 are maintained in a press-fitted and fixed state.

  The fuse element 103 is mainly composed of a pair of fusible bodies 110 (110a, 110b) hermetically sealed inside the inner cylinder 107. That is, the partition plate 112 that holds the conductive partition pin 111 is provided in the inner central portion of the inner cylinder 107. The partition plate 112 is in contact with the inner wall of the inner cylinder 107 and partitions the inside of the inner cylinder 107 into two rooms. In the two rooms thus partitioned, a pair of fusible bodies 110 (110a, 110b) each having one end held by the partition pin 111 and maintained in a conductive state are arranged. The other ends of these fusible bodies 110 (110a, 110b) are electrically connected to the pair of compression terminals 104 (104a, 104b), respectively. The structure will be described next.

  One end of the inner cylinder 107 is partially open, and one compression terminal 104a is attached to the opening in a penetrating state. The one compression terminal 104a is a conductive member formed in a pipe shape, and a fusible pin 113 located inside the inner cylinder 107 is press-fitted therein. The fusible pin 113 is also formed of a conductive member. The end of one fusible body 110 a having one end held by the partition pin 111 is connected to and held by the fusible body pin 113. As a result, the one fusible body 110 a is held between the partition pin 111 and the fusible body pin 113 inside the inner cylinder 107 and is airtight in one room inside the inner cylinder 107 partitioned by the partition plate 112. Is enclosed.

  One compression terminal 104a has a flange 114a. An inner cap 115a is fixed to one end of the inner cylinder 107 to which the one compression terminal 104a is attached via a flange 114a. Thereby, the flange 114a is clamped between one side end of the inner cylinder 107 and the inner cap 115 (115a), and one compression terminal 104a is firmly fixed to one side end of the inner cylinder 107.

  The other end side of the inner cylinder 107 is open at its entire surface. A stopper 116 is fixed to the other end of the opened inner cylinder 107. The plug 116 is partially open, and the other compression terminal 104b is attached to the opening in a penetrating state. The other compression terminal 104b is formed of a conductive member formed in a pipe shape that opens only on the tip side. The end of the other fusible body 110b whose one end is held by the partition pin 111 is connected to and held by the compression terminal 104b. As a result, the other fusible body 110 b is held between the partition pin 111 and the compression terminal 104 b inside the inner cylinder 107 and is placed in the other chamber inside the inner cylinder 107 partitioned by the partition plate 112. Hermetically sealed. The chamber formed by the partition plate 112 and the plug 116 is hermetically filled with an arc extinguishing agent 117 for extinguishing arc discharge.

  The other compression terminal 104b also has a flange 114b. An inner cap 115b is fixed to the other end of the inner cylinder 107 to which the other compression terminal 104b is attached via a flange 114b. Thereby, the flange 114b is clamped between the plug body 116 and the inner cap 115b, and the other compression terminal 104b is firmly fixed to the other end of the inner cylinder 107.

  Thus, the one compression terminal 104a and the other compression terminal 104b are connected to each other through the fusible body pin 113, the fusible body 110a, the partition pin 111, and the fusible body 110b. A pair of protective caps 105 (105a, 105b) are fixed to both ends of the outer cylinder 108 with the pair of compression terminals 104 (104a, 104b) protruding. These protective caps 105 (105a, 105b) are fixed to the outer cylinder 108 by being elastically deformed and fitted to outer cylinder enlarged diameter portions 118 protruding from the peripheral surfaces of both ends of the outer cylinder 108. .

  The protective cap 105 (105a, 105b) has a cap enlarged portion 119 formed at the root portion of the compression terminal 104 (104a, 104b). Terminal cover 106 (106a, 106b) is fitted and attached to each of these cap enlarged diameter portions 119. These terminal covers 106 (106a, 106b) are formed of a deformable flexible member such as rubber. Therefore, these terminal covers 106 (106a, 106b) allow both the root portion and the tip portion of the compression terminal 104 (104a, 104b) to be exposed by deformation. The deformation in this case is realized by a method such as turning or shifting.

  Further, FIG. 2 shows a state where the core wire 202 of the covered lead wire 201 which is a low-voltage lead-in wire is attached to one compression terminal 104b. As described above, since the pair of compression terminals 104 (104a, 104b) are formed in a pipe shape, they are hollow. Therefore, the core wire 202 of the lead wire 201 is inserted into the hollow portion of the compression terminal 104 (104a, 104b). Here, the hollow portion of the compression terminal 104 (104a, 104b) into which the core wire 202 of the lead wire 201 is inserted is referred to as a core wire insertion hole 120 (120a, 120b). In FIG. 2, the sheath 203 of the lead wire 201 in which the core wire 202 is inserted into one of the compression terminals 104b is folded back and stored in the one terminal cover 106b. A portion of the cover 203 that has been cut and folded back is a divided piece 203a.

  FIG. 3 is a perspective view showing the tip of the compression terminal 104 (104a, 104b) as an example. Four cutters 121 are provided on the distal end surfaces of the pair of compression terminals 104 (104a, 104b). These cutters 121 have the highest height on the core wire insertion hole 120 side, which is the inner peripheral surface of the compression terminal 104 (104a, 104b), and the height increases toward the outer peripheral surface of the compression terminal 104 (104a, 104b). It has an inclined shape that becomes lower. The inclined portion is a blade portion 122. Such a blade portion 122 is disposed at a position where the covering 203 comes into contact with the compression terminal 104 (104a, 104b) in accordance with the operation of inserting the core wire 202 of the lead wire 201.

  FIG. 4 is a longitudinal front view of the distal end portion of the compression terminal 104 (104a, 104b) showing a state in which the cover 203 is cut into the cutter 121 as the core wire 202 is inserted into the compression terminal 104 (104a, 104b). When the core wire 202 of the lead wire 201 is inserted into the core wire insertion hole 120 of the compression terminal 104 (104a, 104b), the blade portion 122 of the cutter 121 cuts the coating 203 of the lead wire 201 in accordance with the insertion operation. The cut | disconnected coating | cover 203 leaves the division piece 203a.

  FIG. 5 is a perspective view showing a tip portion of another example of the compression terminal 104 (104a, 104b). In the compression terminal 104 (104a, 104b) of this example, the cutter 121 is provided not on the tip surface of the compression terminal 104 (104a, 104b) but on the peripheral surface of the tip. The front end surface of the compression terminal 104 (104a, 104b) is a tapered surface 123. The taper surface 123 has an inclined shape whose height decreases from the core wire insertion hole 120, which is the inner peripheral surface of the compression terminal 104 (104a, 104b), toward the outer peripheral surface. Along the inclined shape of the tapered surface 123, the blade portion 122 formed on the cutter 121 is continuous. Such a blade portion 122 is arranged at a position where the covering 203 guided by the taper surface 123 comes into contact with the compression terminal 104 (104a, 104b) in accordance with the operation of inserting the core wire 202 of the lead wire 201. Yes.

  6 is a longitudinal front view of the distal end portion of the compression terminal 104 (104a, 104b) showing a state in which the covering 203 is cut into the cutter 121 as the core wire 202 is inserted into the compression terminal 104 (104a, 104b) shown in FIG. FIG. When the core wire 202 of the lead wire 201 is inserted into the core wire insertion hole 120 of the compression terminal 104 (104a, 104b), the covering 203 of the lead wire 201 is guided through the taper surface 123 according to the insertion operation, and the taper surface 123 The blade 122 of the continuous cutter 121 cuts the coating 203 of the lead wire 201. The cut | disconnected coating | cover 203 leaves the division piece 203a.

  The cutter 121 shown in FIG. 3 and FIG. 4 as an example and as shown in FIG. 5 and FIG. 6 as another example is formed of a metal member as an example, and is formed on the tip surface and the tip peripheral surface of the compression terminal 104 (104a, 104b). It can be fixed by welding or bonding. As another example, the cutter 121 is formed of resin and can be fixed to the front end surface or front end peripheral surface of the compression terminal 104 (104a, 104b) by adhesion.

  FIGS. 7A to 7F are front views showing a process of attaching the lead wire 201 to the compression terminal 104. A method of attaching the lead wire 201 to the compression terminal 104 will be described with reference to FIGS. In this case, the compression terminal 104 (104a, 104b) is simply shown as the compression terminal 104, the protective cap 105 (105a, 105b) is simply the protection cap 105, and the terminal cover 106 (106a, 106b) is simply shown as the terminal cover 106 in FIG. explain.

  FIG. 7A shows a wire fuse 101 and a covered lead wire 201 that is a low-voltage lead wire to be attached to the compression terminal 104 of the wire fuse 101.

  As shown in FIG. 7B, the distal end side of the terminal cover 106 that covers the compression terminal 104 is deformed to expose the distal end portion of the compression terminal 104. For example, the deformation in this case is performed by shifting the distal end side of the terminal cover 106 to the root side. At this time, since the terminal cover 106 is formed of a deformable flexible member such as rubber, it is possible to easily perform an operation of deforming the terminal cover 106 to expose the distal end portion of the compression terminal 104.

  Next, as shown in FIG. 7C, the core wire 202 of the lead wire 201 is inserted into the compression terminal 104 with the tip portion exposed (see FIGS. 4 and 6). At this time, according to the insertion operation, the blade portion 122 (see FIGS. 3, 4, 5, and 6) of the cutter 121 provided at the tip of the compression terminal 104 with which the coating 203 of the lead wire 201 abuts is covered. 203 is disconnected. Since the four cutters 121 are provided as described above, the covering 203 is divided into four parts and cut to leave four divided pieces 203a.

  Next, as shown in FIG. 7D, the deformed distal end side of the terminal cover 106 is returned to its original state. As a result, the compressed terminal 104 is returned together with the cut piece 203a of the cover 203 that has been cut and covered with the terminal cover 106 (see also FIG. 2). Then, since the divided piece 203a of the covering 203 is pressed against the terminal cover 106, the lead wire 201 is temporarily fixed.

  Next, as shown in FIG. 7E, the base side of the terminal cover 106 is deformed. For example, the deformation in this case is performed by shifting the base side of the terminal cover 106 to the tip side. At this time, the terminal cover 106 is disengaged from the cap enlarged portion 119 formed in the protective cap 105. This operation can be easily performed because the terminal cover 106 is formed of a deformable flexible member such as rubber. By deforming the base side of the terminal cover 106, the base side of the compression terminal 104 to which the lead wire 201 is temporarily fixed is exposed. Therefore, the exposed portion on the base side of the compression terminal 104 is compressed with a compression pliers (not shown) and crushed. As a result, the lead wire 201 is permanently fixed to the compression terminal 104. At this time, since the lead wire 201 has already been temporarily fixed, there is no need to squeeze and temporarily fix the exposed portion of the compressed terminal 104 prior to the main fixing with general pliers (not shown). .

  Then, as shown in FIG. 7F, the deformed root side of the terminal cover 106 is returned to the original state. That is, the terminal cover 106 is re-fitted to the cap enlarged portion 119 formed on the protective cap 105. As a result, the compressed terminal 104 is again covered with the terminal cover 106. In this way, the installation work of the lead wire 201 to the compression terminal 104 is completed.

  As described above, when the lead wire 201 is attached to the compression terminal 104, the cutter 121 provided at the distal end of the compression terminal 104 according to the operation of inserting the core wire 202 of the lead wire 201 into the compression terminal 104. The coating 203 of the lead wire 201 is cut by the blade portion 122. Thereby, when attaching the lead wire 201 to the electric wire fuse 101, the operation | work which peels the coating | cover 203 of the lead wire 201 and exposes the core wire 202 can be made unnecessary.

  Further, in this embodiment, the compression terminal 104 is covered with the terminal cover 106 together with the cut cover 203 and the lead wire 201 is temporarily fixed, and the root side of the terminal cover 106 is deformed so that the lead wire 201 temporarily The stopped compression terminal 104 is compressed and the lead wire 201 is finally fixed. Thus, when the lead wire 201 is attached to the compression terminal 104, the work can be performed without removing the terminal cover 106 from the insulating cylinder 102, and the compression terminal 104 is crushed with pliers (not shown). The temporary fixing work of the lead wire 201 can be made unnecessary. In addition, since the compression terminal 104 and the terminal cover 106 are not compressed by compression pliers (not shown), the terminal cover 106 is not damaged when the lead wire 201 is attached to the compression terminal 104.

  Further, in the present embodiment, as an example, a cutter 121 formed so as to protrude from the distal end surface of the compression terminal 104 is used (see FIGS. 3 and 4). In this case, since the tip of the lead wire 201 to be attached to the compression terminal 104 first comes into contact with the cutter 121, the covering 203 of the lead wire 201 is easily cut and the workability is improved.

  Further, in the present embodiment, as another example, a cutter 121 formed so as to protrude from the tip peripheral surface of the compression terminal 104 is used (see FIGS. 5 and 6). In this case, since the tip of the lead wire 201 to be attached to the compression terminal 104 starts to be inserted into the core wire insertion hole 120 and contacts the cutter 121, the covering 203 of the lead wire 201 is cut at a certain position, Good workability quality. In this case, if the distal end surface of the compression terminal 104 is formed in a tapered shape, the workability of the operation of inserting the distal end portion of the lead wire 201 to be attached to the compression terminal 104 into the core wire insertion hole 120 is improved. Can do.

  In implementation, a structure peculiar to the present embodiment for realizing the mounting process of the lead wire 201 to the compression terminal 104 shown in FIGS. 7A to 7F, for example, the tip of the compression terminal 104 is provided. You may provide the structure of the terminal cover 106 which covers the cutter 121 and the compression terminal 104 only in one of a pair of compression terminal 104 (104a, 104b). In this case, the other of the pair of compression terminals 104 (104a, 104b) has, as an example, a lead wire (shown in FIG. 10) to the compression terminal (compression terminal 13 in FIG. 10) shown in FIGS. 10 may adopt a conventional structure for realizing the mounting process of the lead wire 15).

  A second embodiment of the present invention will be described with reference to FIGS. The same parts as those of the first embodiment are denoted by the same reference numerals, and description thereof is also omitted.

  FIG. 8 is a longitudinal front view of the distal end portion of the compression terminal 104 and the terminal cover 106 included in the wire fuse 101. The wire fuse 101 of the present embodiment does not require the steps shown in FIGS. 7B and 7D during the mounting process of the lead wire 201 to the compression terminal 104 in the wire fuse 101 of the first embodiment. As a structure for this purpose, the wire fuse 101 is devised on the terminal cover 106. In other words, at least one of the pair of terminal covers 106 (106a, 106b) has a structure that covers the tip portion of the compression terminal 104 by forming a gap S between the compression terminal 104 and the compression terminal 104. The tip of the at least one terminal cover 106 has a trumpet shape.

  FIG. 9 is a longitudinal front view of the distal end portion of the compression terminal 104 and the terminal cover 106 in a state where the lead wire 201 which is a low-voltage lead-in wire is attached. In the present embodiment, when the lead wire 201 is attached to the compression terminal 104, the lead wire 201 is inserted into the distal end portion of the terminal cover 106. At this time, since the tip end portion of the terminal cover 106 is formed in a trumpet shape, the operation of inserting the lead wire 201 is easy. The inserted lead wire 201 hits the tip of the compression terminal 104. Therefore, the lead wire 201 is further pushed so that the covering 203 of the lead wire 201 is inserted into the core wire insertion hole 120 of the compression terminal 104. In accordance with the insertion operation of the core wire 202 in the lead wire 201 into the core wire insertion hole 120 of the compression terminal 104, the covering 203 of the lead wire 201 is cut by the blade portion 122 of the cutter 121. Then, the cut piece 203 a of the cover 203 is pushed into the gap S formed between the compression terminal 104 and the terminal cover 106 and packed into the gap S. As a result, the divided piece 203a of the covering 203 is pressed against the terminal cover 106, and the lead wire 201 is temporarily fixed.

  Subsequent fastening of the lead wire 201 is performed through the same process as that of the wire fuse 101 of the first embodiment (see FIGS. 7E and 7F).

  Thus, according to the present embodiment, the process shown in FIGS. 7B and 7D is not necessary during the process of mounting the lead wire 201 to the compression terminal 104 in the wire fuse 101 of the first embodiment. can do. Therefore, the mounting work of the lead wire 201 to the electric wire fuse 101 can be further simplified, and the work load on the operator can be reduced.

It is a front view of the electric wire fuse which shows the 1st Embodiment of this invention. It is a vertical front view of the electric wire fuse in the state where a lead wire which is a low-voltage lead-in wire is attached. It is a perspective view which shows the front-end | tip part as an example of a compression terminal. It is a vertical front view of the front-end | tip part of a compression terminal which shows the state by which the coating | cover is cut | disconnected by the cutter with insertion of the core wire with respect to a compression terminal. It is a perspective view which shows the front-end | tip part as another example of a compression terminal. It is a vertical front view of the front-end | tip part of a compression terminal which shows the state by which the coating | cover is cut | disconnected by the cutter with insertion of the core wire with respect to a compression terminal. (A)-(f) is a front view which shows the mounting process of the lead wire with respect to a compression terminal. It is a vertical front view of the compression terminal which the electric wire fuse which shows the 2nd Embodiment of this invention, and the front-end | tip part of a terminal cover. It is a vertical front view of the front-end | tip part of the compression terminal and terminal cover of the state with which the lead wire which is a low voltage | pressure lead-in was attached. (A)-(e) is a front view which shows the mounting process of the lead wire with respect to a compression terminal as an example of the past.

Explanation of symbols

102 Insulating cylinder 103 Fuse element 104 (104a, 104b) Compression terminal 106 (106a, 106b) Terminal cover 121 Cutter 122 Blade portion 201 Lead wire 202 Core wire 203 Covering S Gap

Claims (6)

An insulating cylinder;
A fuse element enclosed in the insulating cylinder;
A pair of compression terminals each having a hollow structure that is connected to both ends of the fuse element and drawn out from the insulating cylinder and allows insertion of a core wire of a covered lead wire that is a low-voltage lead wire;
A terminal cover that covers the compression terminal and allows both the root portion and the tip portion to be exposed by deformation; and
Provided at the tip of the compression terminal covered with the terminal cover, and having a blade portion at a position where the coating abuts according to the insertion operation of the core wire of the lead wire with respect to the compression terminal, for the insertion operation of the core wire A cutter for cutting the coating according to
Electric wire fuse with. An insulating cylinder;
A fuse element enclosed in the insulating cylinder;
A pair of compression terminals each having a hollow structure that is connected to both ends of the fuse element and drawn out from the insulating cylinder and allows insertion of a core wire of a covered lead wire that is a low-voltage lead wire;
Provided at the tip of the compression terminal, and having a blade portion at a position where the coating comes into contact with the compression terminal according to the insertion operation of the core wire of the lead wire, and cuts the coating according to the insertion operation of the core wire. With cutter,
A terminal cover that covers and forms a gap between the compression terminal and the compression terminal at the tip portion of the compression terminal, and allows the root portion to be exposed by deformation,
Electric wire fuse with.   The electric wire fuse according to claim 1 or 2, wherein the cutter is formed so as to protrude from a distal end surface of the compression terminal.   The electric wire fuse according to claim 1, wherein the cutter is formed so as to protrude from a front end peripheral surface of the compression terminal. A distal end side of a terminal cover that is connected to an end portion of a fuse element enclosed in an insulating cylinder and covers a compression terminal having a hollow structure drawn out from the insulating cylinder is deformed to expose the distal end portion of the compression terminal. Process,
A core wire of a covered lead wire, which is a low-voltage lead wire, is inserted into the compression terminal with the tip portion exposed, and has a blade portion provided at the tip of the compression terminal with which the coating abuts according to the insertion operation. Cutting the coating with a cutter;
Covering the compression terminal together with the cut coating by temporarily returning the deformed distal end side of the terminal cover, and temporarily fixing the lead wire;
Deforming the base side of the terminal cover and compressing the compression terminal to which the lead wire is temporarily fixed to fix the lead wire;
Covering the compressed terminal by returning the deformed root side of the terminal cover;
A method for attaching a low-voltage lead-in wire to an electric wire fuse. Insert a core wire of a covered lead wire, which is a low-voltage lead wire, into a compression terminal having a hollow structure connected to the end of a fuse element enclosed in an insulating cylinder and drawn out from the insulating cylinder. Cutting the covering with a cutter having a blade provided at the tip of the compression terminal with which the covering abuts according to operation;
In the process of cutting the covering, the step of temporarily holding the lead wire by storing the cut covering in a compressed state in a gap formed between a terminal cover that covers the compression terminal and the compression terminal; ,
Deforming the base side of the terminal cover and compressing the compression terminal to which the lead wire is temporarily fixed to fix the lead wire;
Covering the compressed terminal by returning the deformed root side of the terminal cover;
A method for attaching a low-voltage lead-in wire to an electric wire fuse.

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