JPH0580115U - Cutting groove forming blade in intermediate strip device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a cutting groove forming blade for an intermediate stripping device, which prevents wrinkles from occurring in the sheath of an electric wire and changes in the strip length, and facilitates stripping work of the sheath. To do. A harness manufacturing apparatus includes first and second clamps that are movable along a longitudinal direction of an electric wire, a pair of cutting cutters, and a pair of cutting blade bodies 153. Cutting blade 153
Has a cutting blade 153b and a guide body 153c.
The cutting blade 153b has a blade portion 153d having a gradually increasing thickness on the rear side with respect to the cutting direction of the covering portion of the electric wire. The guide body 153c has a V-groove-shaped electric wire guide groove 153e arranged on the front side of the cutting blade with respect to the covering portion cutting direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cutting groove forming blade in an intermediate stripping device for electric wires used in manufacturing harnesses and the like.

[0002]

[Prior Art]

 Conventionally, the intermediate stripping of electric wires by this type of intermediate stripping device has been performed as follows.

That is, as shown in FIG. 21, the electric wire 10 is held by the first and second clamps 1 and 2 which are respectively movable in the directions of arrows P and Q, and as shown in FIG. The covering portion 11 on the outer circumference of the electric wire 10 is cut by a pair of upper and lower cutting cutters 3 (cutting blade bodies) between the lamps 1 and 2. In this state, as shown in FIG. 23, both clamps 1 and 2 are moved in the direction of arrow Q by a predetermined amount to move the electric wire 10 along the longitudinal direction thereof. The covering portion 11 on one side is compressed from the covering portion 11 on the other side so as to be separated from the covering portion 11 on the other side, and the core wire portion 13 of a predetermined length is exposed between the covering portions 11 here.

[0004]

[Problems to be solved by the device]

 However, according to the above-mentioned intermediate strip method, wrinkles are formed in the covering portion 11 after the intermediate strip treatment, which impairs the appearance of the product and causes wrinkles to return to a shape change over time, resulting in a change in strip length. There was a problem that the quality was not stable.

In view of the above problems, the present invention solves the above problems by stripping off the coating portion of the wire in the intermediate strip area, and facilitates the stripping operation of the coating portion. An object is to provide a cutting groove forming blade in a strip device.

[0006]

[Means for Solving the Problems]

 Technical means for achieving the above-mentioned object include first and second clamps that are capable of gripping and releasing an electric wire and are respectively movable along the longitudinal direction of the electric wire, and positions at both ends of the intermediate strip area. A pair of cutting blades for cutting the wire coating by sandwiching the wire and a pair of cutting blades for cutting the wire coating in the intermediate strip area from one end to the other along the length of the wire. A middle strip device comprising a fissure forming blade, wherein the fissure forming blade is a blade portion gradually thickened rearward with respect to a cutting direction of a covering portion of the electric wire. And a guide body having a V-groove-shaped electric wire guide groove arranged on the front side of the cutting blade with respect to the covering portion cutting direction.

[0007]

[Action]

 According to the present invention, the electric wire is gripped by the first and second clamps, and the electric wire is sandwiched between the pair of cutting blades at a position on the one end side of the intermediate strip region to cut the covering portion of the electric wire. In this state, move both clamps slightly in the longitudinal direction of the wire to cut off the coating on one end side.

Next, the electric wire is sandwiched between the pair of cutting groove forming blades. Here, the electric wire in the intermediate strip region is located between the electric wire guide grooves of both guide bodies, and the two cutting blades are located at one end side of the separated intermediate strip region. At this time, since the wire guide groove is formed in a V-groove shape, it is possible to deal with the covering portion of the wire having various outer diameters, which is highly versatile.

In this state, both clamps are moved in the longitudinal direction of the wire by a distance corresponding to the intermediate strip area. Along with this movement, a cut groove is formed in the covering portion of the wire in the intermediate strip region from one end side to the other end side along the longitudinal direction. Further, since the blade part of the cutting blade is gradually thickened toward the rear side with respect to the covering part cutting direction, the covering part that is cut along with the formation of the tear groove is separated by the inclination of the cutting part. Be guided. At this time, since the wire guide groove of the guide body is arranged on the front side of the cutting blade in the cutting direction of the covering portion, the separation of the cut covering portion is not regulated at all.

Next, at a position on the other end side of the intermediate strip region, the electric wire is sandwiched by a pair of cutting blades, and the covering portion of the electric wire is cut. In this state, move both clamps slightly in the longitudinal direction of the wire to separate the coating on the other end.

Here, it is possible to obtain a state in which the covering portion of the electric wire in the intermediate strip region is separated from the other portions, and the slit groove extending from one end side to the other end side of the intermediate strip region is formed. At this time, since the cut cover is separated, the subsequent stripping operation becomes easy.

[0012]

【Example】

 An embodiment of the present invention will now be described with reference to the drawings. FIG. 1 is a perspective view showing a harness manufacturing apparatus, FIG. 2 is a side view of the apparatus, FIG. 3 is a plan view of the apparatus, and FIG. It is a principal part perspective view of an apparatus. As shown in these figures, this device includes an electric wire feeding means 50 for intermittently feeding two electric wires 600a and 600b simultaneously, a cutter section 100, and an electric wire 600a which is movable in three-dimensional directions. , 600b capable of gripping / releasing the first and second clamp means 250, 350, first and second terminal crimping means 400, 500, and discharging means 550. In this device, as shown in FIG. 5, terminals 602 are crimped to both ends, the covering portion 601 in the intermediate strip area is peeled off, and two harnesses in which the core wire portion 603 is exposed are sequentially manufactured. I am configuring.

First, the electric wire feeding means 50 is provided with a pair of upper and lower carrying portions 51, 51 sandwiching the electric wire feeding lines Xa, Xb, and both the carrying portions 51, 51 are pivotally connected to one end thereof. The rotation shafts of the length measuring rollers 52, 52 thus formed are swingable around the fulcrum. Then, the electric wires are oscillated so that the two electric wires 600a and 600b are sandwiched by the feeding rollers 53 and 53 pivotally connected to the other ends of the electric wires 51 and 51, respectively. When the feeding motor 60 (see FIG. 3) is driven, both feeding rollers 53, 53 rotate in opposite directions, and the two electric wires 600a, 600b simultaneously move along the electric wire feeding lines Xa, Xb. It is configured to be fed in the direction of arrow P.

The first and second clamp means 250, 350 include first and second clamps 200, 300 capable of gripping and releasing electric wires 600a, 600b, respectively, and first and second clamps 200, 300. It has first and second clamp moving means 251 and 351 for movably supporting 300 respectively in the three-dimensional directions. In the first and second clamp moving means 251, 351, the left and right moving portions 202 and 302 are respectively supported on the bases 201 and 301 so as to be movable in the left and right directions indicated by arrows R and S, and are moved left and right. Front and rear moving portions 203 and 303 are respectively supported by the portions 202 and 302 so as to be movable in the front and rear directions indicated by arrows P and Q, respectively. Further, the first and second clamps 200 and 300 are supported by the front-rear moving portions 203 and 303 so as to be vertically movable as shown by arrows T and U. The left and right moving parts 202 and 302 are configured to move in the left and right directions via power transmission mechanisms 204a and 304a when driven by motors 204 and 304 attached to the bases 201 and 301, respectively. There is. Further, the front-rear moving units 203 and 303 are configured to move in the front-rear direction by driving a motor (not shown). Further, the second clamp 300 is configured to move up and down in the vertical direction by driving a cylinder 305 arranged between the clamp 300 and the front-rear moving portion 303 on one side.

As shown in FIG. 4, the first clamp 200 has wire insertion holes 210 and 210 through which the wires 600a and 600b fed along the wire feeding lines Xa and Xb can be inserted, respectively. The electric wires 600a and 600b which are respectively formed and pass through the insertion holes 210 and 210 can be grasped and released, respectively.

The second clamp 300 corresponds to the two electric wires 600a and 600b, respectively, and has two substantially L-shaped fixed claws 306 and 306 and the fixed claws 306 and 306 that are arranged to face each other. Of the movable claws 307 and 307 mounted on the respective horizontal portions of the movable claws 307 and 307 so as to move forward and backward in the left and right directions orthogonal to the electric wire feeding lines Xa and Xb, and a cylinder 308 for driving the movable claws 307 and 307 forward and backward, respectively. , 308.

The movable claws 307, 308 are driven by driving the cylinders 308, 308 with the electric wires 600a, 600b arranged between the vertical parts of the fixed claws 306, 306 and the movable claws 307, 307, respectively. When the movable claws 307 and 307 move forward, the fixed claws 306 and 306 and the movable claws 307 and 307 grip the electric wires 600a and 600b, respectively, and when the movable claws 307 and 307 retract, the electric wires 600a and 600b are released. Is configured.

FIG. 6 shows a front view of the cutter unit 100. As shown in the figure, the cutter unit 100 includes a cutter body 101 having a wire insertion opening 102 formed in the center and a pair of cutting blades arranged vertically with the wire feeding lines Xa and Xb interposed therebetween. The cutting / cutting cutters 103, 103, the first driving unit 104 for driving the cutting / cutting cutters 103, 103 to open and close, and the cutting / cutting cutters 103, 103 corresponding to the cutting / cutting cutters 103, 103. It has a pair of upper and lower cutting blades 153, 153 as arranged cutting groove forming blades, and a second drive portion 154 for opening and closing the cutting blades 153, 153. ..

The ball screw 105 of the first drive unit 104 has a right-hand thread region 105a engraved on the upper outer periphery thereof and a left-hand thread region 105b engraved on the lower outer periphery thereof. Both ends of the ball screw 105 are rotatably supported by the cutter body 101 via bearings 106 so that the axial direction thereof is arranged in the vertical direction. The rotation drive shaft of the servo motor M1 is connected to the lower end of the ball screw 105, and the rotation of the rotation drive shaft of the servo motor M1 is transmitted to the ball screw 105. Further, the brackets 107 and 107 to which the cutting / cutting cutters 103 and 103 are attached are respectively screwed to the right-hand screw region 105a and the left-hand screw region 105b of the ball screw 105 in a state in which the rotation around the vertical axis is restricted. Has been done. Then, as described above, when the ball screw 105 rotates, the brackets 107, 107 screwed into the right screw region 105a and the left screw region 105b are moved along the axial direction of the ball screw 105 in accordance with the rotating direction of the ball screw 105. The pair of cutting / cutting cutters 103, 103 are driven to move toward and away from each other, and thus are driven to open and close.

On the other hand, the cutting blades 153, 153 side is also configured in substantially the same manner as above. That is, the ball screw 155 is rotatably supported by the cutter body 101 via the bearing 156, and the brackets 157 and 157 to which the pair of the cutting blades 153 and 153 are attached respectively are arranged around the vertical axis. The ball screw 155 is screwed to the right-hand screw region 155a and the left-hand screw region 155b in a state in which the rotation is restricted. The servomotor M2 is driven to bring the brackets 157 and 157 into contact with and separate from each other in the same manner as described above, so that the cutting blade bodies 153 and 153 are opened and closed.

As shown in FIGS. 7A and 7B, each cutting blade body 153, 153 is composed of a pair of a cutting blade 153b and a guide body 153c that are detachably attached to a support base 153a. The cutting blade 153b has a blade portion 153d for cutting the covering portion 601 which is sharpened on the front edge side and gradually thickened on the rear side with respect to the cutting direction of the covering portion 601 of the electric wires 600a and 600b. ing. Further, the guide body 153c has a V-groove-shaped electric wire guide groove 153e that expands 90 degrees. The guide body 153c is attached so that the wire guide groove 153e is located on the front side of the cutting blade 153b with respect to the cutting direction of the covering portion 601, and the guide bodies of the pair of cutting blades 153, 153 are provided. 153c is configured to mesh with each other.

As shown in FIG. 8, when the electric wires 600a and 600b are sandwiched by the upper and lower cutting blades 153 and 153, the electric wire guide grooves 153e guide the electric wires 600a and 600b to the central groove bottom. Guided in a sandwiched manner, the cutting blades 153b are positioned to face each other in the radial direction of the electric wires 600a, 600b, and are configured to face the covering portion 601 region.

As shown in FIGS. 1 to 3, the discharging means 550 includes a support 551, rails 552 fixed to the upper ends of the support 551 and arranged along the left-right direction indicated by arrows R and S, and a rail 552. And a discharge clamp 553 supported movably along the rail longitudinal direction. Then, the discharge clamp 553 is moved in the left-right direction along the rail 552 by the driving of the driving means (not shown), and the discharge clamp 553 can simultaneously grasp and release the two cut wires. ..

In this harness manufacturing apparatus, each of the drive units is connected to a control unit (not shown), and the drive of each drive unit is controlled based on the output signal from the control unit. The operation as described is performed.

Next, the operation of this harness manufacturing apparatus will be described. Before the operation starts, the first and second clamps 200 and 300 are arranged on the electric wire feeding lines Xa and Xb, respectively, and are in a state where the electric wires 600a and 600b are not gripped and cut and cut. The insert cutters 103, 103 and the cutting blade bodies 153, 153 are opened respectively. Further, the discharge clamp 553 of the discharge means 550 is in the electric wire holding release state at the position moved rightward as shown by the arrow R in FIG.

From this state, as shown in FIG. 9, the feeding roller 53 of the electric wire feeding means 50 rotates and the electric wires 600a and 600b are measured in the direction of arrow P along the electric wire feeding lines Xa and Xb. It is fed (in FIG. 9, only one side of the electric wire 600a is shown. The same applies to FIG. 10 and FIG. 20).

Next, as shown in FIG. 10, after the rotation of the feeding rollers 53, 53 is stopped, the nipping between the feeding rollers 53, 53 by the electric wires 600a, 600b is released, and the first and The electric wires 600a and 600b are gripped by the second clamps 200 and 300. As a result, the tips of the cutting / cutting cutters 103, 103 are arranged corresponding to the positions of the one ends on the upstream side in the electric wire feeding direction P in the intermediate strip regions of the electric wires 600a, 600b.

Next, as shown in FIG. 11, the electric wires 600a and 600b are cut by the cutting / cutting cutters 103 and 103 so as to be sandwiched from above and below. In this state, if both clamps 200 and 300 are moved a little in the direction of arrow P as shown in FIG. 12, the covering portion 601 on one end side of the intermediate strip region is separated, and the core wire portion 603 is exposed for a slight length. can get.

After that, both cutting / cutting cutters 103, 103 are opened, and in that state, the distance between the two clumps 200, 300 is kept as it is, and as shown in FIG. It is moved to the arrangement position of 153, 153 (to the right as indicated by arrow R).

After that, as shown in FIG. 14, both the cutting blade bodies 153 and 153 are closed, and the blade portion 153d of the cutting blade 153b is inserted into the gap between the covering portions 601 which are cut and separated from each other. At the same time, the covering portion 601 of the electric wires 600a and 600b in the intermediate strip region is slidably clamped in the electric wire guide groove 153e of the guide body 153c.

Next, in this state, as shown in FIG. 15, both clamps 200 and 300 are moved in the direction of arrow P along the longitudinal direction of the electric wires 600a and 600b, respectively, by a predetermined amount (the length of the intermediate strip region). The slits 620 are moved by an amount corresponding to the dimension, and upper and lower slit-shaped slit grooves 620 extending from one end side to the other end side of the intermediate strip area are cut and formed. At this time, as shown in FIG. 16, the blade portion 153d of the cutting blade 153b is gradually thickened rearward with respect to the cutting direction Q of the covering portion 601. The covering portions 601 that have been cut apart are separated and guided in a direction in which they spread out due to the inclination of the blade portion 153d. Further, since the wire guide groove 153e of the guide body 153c is arranged on the front side of the cutting blade 153d with respect to the cutting direction Q of the covering portion 601, there is no restriction on the separation of the covering portion 601 that has been cut in the spreading direction. The separating action of the covering portion 601 by the blade portion 153d can be smoothly exhibited.

After that, the cutting blades 153, 153 are opened, the first and second clamps 200, 300 respectively move to the left as shown by the arrow S, and the electric wires 600a, 600b are moved to the electric wire feeding line Xa. , Xb. At this time, the tips of the cutting / cutting cutters 103, 103 are arranged corresponding to the positions of the other ends on the downstream side with respect to the electric wire feeding direction P in the intermediate strip regions of the electric wires 600a, 600b.

In this state, as shown in FIG. 17, the cutting / cutting cutters 103, 103 are closed, and the other ends of the electric wires 600a, 600b on the downstream side in the intermediate strip region are sandwiched from above and below. Get caught.

In this state, as shown in FIG. 18, when both clamps 200 and 300 are moved a little in the direction of arrow Q, the covering portion 601 on the other end side of the intermediate strip area is cut off, and the core wire portion 603 is formed on the other end side. An exposed state is obtained for a short length. Further, by the movement of both clamps 200 and 300, the covering portion 601 separated by the cut groove 620 is slid up and guided to the outer peripheral side of the residual covering portion 601 at the one end side of the intermediate strip area.

After that, the cutting / cutting cutters 103, 103 are opened, and after both clamps 200, 300 have moved a predetermined amount in the direction of arrow Q, as shown in FIG. 19, the cutting / cutting cutters 103, 103 cover the covering portions. It is closed to a position having a gap slightly wider than the outer diameter of the covering portion 601 that does not cut into 601.

In this state, both clamps 200 and 300 are moved in the direction of arrow P by a predetermined amount. At this time, the cutting / cutting cutters 103, 103 prevent movement of the covering portion 601 of the intermediate strip area, which is separated and formed into a ride-up shape, in the direction of arrow P as shown in FIG. The portion 601 (strip dust) is torn at the portion of the cut groove 620 and peeled off from the core wire portion 603.

After that, the end cutting process of the electric wires 600a and 600b and the terminal crimping process are sequentially performed. That is, from the state shown in FIG. 20, the electric wires 600a and 600b are released from the first and second clamps 200 and 300, and the electric wires 600a and 600b are nipped by the feeding rollers 53 and 53 to feed the electric wires. It is fed in the direction of arrow P along the feeding lines Xa and Xb.

Next, after the electric wires 600a and 600b are gripped again by the first and second clamps 200 and 300, and the electric wires 600a and 600b are released from being held by the feeding rollers 53 and 53, the cutting is performed. The electric wires 600a and 600b are cut by the cutting cutters 103 and 103, respectively (end wire cutting processing). After that, the first clamp 200 advances a small amount in the direction of the arrow P, and the entire circumference of the covering portion at the downstream end of the electric wire (hereinafter, referred to as “residual electric wire”) 600a, 600b gripped by the first clamp 200 is cut. -It is cut by the cutting cutters 103, 103. Then, the first clamp 200 retracts in the direction of arrow Q in the cut state, so that the covering portion 601 at the downstream end of the two residual electric wires 600a and 600b is peeled off. Subsequently, the first clamp 200 moves in the right direction shown by the arrow R, and the first terminal crimping means 400 causes the terminals 602, 602 to be attached to the downstream stripped ends of the two residual electric wires 600a, 600b. Are crimped respectively. Thereafter, the first clamp 200 moves to the left as shown by the arrow S and returns to the original position shown in FIGS.

On the other hand, while the terminal 602 is crimped to the downstream stripped ends of the residual electric wires 600a and 600b, the electric wires (hereinafter, referred to as “cutting electric wires”) 600a gripped by the second clamp 300, The covering portion 601 at the upstream end of 600b is peeled off in the same manner.

Next, the second clamp 300 moves to the left as shown by the arrow S, and the second terminal crimping means 500 causes the terminals on the upstream stripping ends of the two cut wires 600a and 600b, respectively. Is crimped.

After that, the two cut wires 600 a and 600 b are gripped by the discharge clamp 553 and the grip by the second clamp 300 is released, respectively, and the cut wires 600 a and 600 b are discharged from the second clamp 300. It is delivered to the clamp 553. Subsequently, the discharge clamp 553 moves along the rail 552 in the leftward direction indicated by the arrow S 1, and then the cut electric wires 600a and 600b are released from the grips and discharged to the electric wire discharging portion (not shown).

On the other hand, the second clamp 300, which has delivered the cut electric wires 600a and 600b to the discharge clamp 553, is moved rightward as shown by the arrow R and returns to the original position shown in FIGS.

By repeating such an operation continuously, the harnesses (see FIG. 5) in which the covering portion 601 in the intermediate strip region is peeled off and the terminals 602 are crimped at both ends are sequentially manufactured two by two. It

As described above, according to this harness manufacturing apparatus, the covering portion 601 of the electric wires 600a and 600b in the intermediate strip area is stripped and removed, and it is possible to effectively prevent the generation of wrinkles as in the conventional case. In addition, the appearance is not impaired at all, the change in strip length can be prevented, and the quality is stable.

Further, when the covering portion 601 of the intermediate strip area is cut by the blade portion 153d of the cutting blade body 153 to form the tear groove 620, the guide portions are separated and guided in the directions in which they spread. The covering portion 601 can be peeled off easily after the cut groove 620 is formed, and the peeling work can be facilitated.

Furthermore, since the wire guide groove 153e of the guide body 153c of the cutting blade body 153 has a V-groove shape of 90 degrees, it is possible to deal with the covering portion 601 of the wires 600a and 600b having various outer diameters. It is possible and versatile. Therefore, it is suitable for mass production and the manufacturing cost can be reduced.

[0047]

[Effect of the device]

 As described above, according to the slit groove forming blade in the intermediate strip device of the present invention, the cutting blade body that cuts the covering portion of the electric wire at both end positions of the intermediate strip area and the covering portion of the electric wire in the intermediate strip area. A cutting groove forming blade body that cuts along one side of the wire from one end side to the other end side, and the cutting groove forming blade body is gradually fleshed to the rear side with respect to the covering portion cutting direction of the electric wire. A cutting blade having a thick blade portion, and a guide body having a V-groove-shaped electric wire guide groove arranged on the front side of the cutting blade with respect to the covering portion cutting direction. By stripping off the sheath of the wire in the middle strip area, it is possible to effectively prevent the occurrence of wrinkles and prevent changes in strip length, which not only stabilizes the quality but also eliminates the work of stripping the sheath. There is an advantage that it can be facilitated.

[Brief description of drawings]

FIG. 1 is a perspective view of a harness manufacturing apparatus showing an embodiment of the present invention.

FIG. 2 is a side view of the harness manufacturing apparatus.

FIG. 3 is a plan view of the harness manufacturing apparatus.

FIG. 4 is a perspective view of a main part of the harness manufacturing apparatus.

FIG. 5 is a perspective view showing a harness manufactured by the harness manufacturing apparatus.

FIG. 6 is a front view showing a cutter section of the harness manufacturing apparatus.

FIG. 7 is a perspective view of a cutting blade body.

FIG. 8 is an explanatory view of a main part showing a meshing state of a pair of cutting blade bodies.

FIG. 9 is a side view for explaining the operation of the harness manufacturing apparatus.

FIG. 10 is a side view for explaining the operation of the harness manufacturing apparatus.

FIG. 11 is a side view for explaining the operation of the harness manufacturing apparatus.

FIG. 12 is a side view for explaining the operation of the harness manufacturing apparatus.

FIG. 13 is a side view for explaining the operation of the harness manufacturing apparatus.

FIG. 14 is a side view for explaining the operation of the harness manufacturing apparatus.

FIG. 15 is a side view for explaining the operation of the harness manufacturing apparatus.

FIG. 16 is an enlarged view of an essential part for explaining the operation of the harness manufacturing apparatus.

FIG. 17 is a plan view for explaining the operation of the harness manufacturing apparatus.

FIG. 18 is a plan view for explaining the operation of the harness manufacturing apparatus.

FIG. 19 is a plan view for explaining the operation of the harness manufacturing apparatus.

FIG. 20 is a plan view for explaining the operation of the harness manufacturing apparatus.

FIG. 21 is a side view for explaining the operation of the conventional harness manufacturing apparatus.

FIG. 22 is a side view for explaining the operation of the conventional harness manufacturing apparatus.

FIG. 23 is a side view for explaining the operation of the conventional harness manufacturing apparatus.

[Explanation of symbols]

 103 cutting / cutting cutter 153 cutting blade body 153b cutting blade 153c guide body 153d blade portion 153e electric wire guide groove 200 first clamp 300 second clamp 600a, 600b electric wire 601 covering portion 603 core wire portion 620 cutting groove

Claims (1)

[Scope of utility model registration request] 1. A first and a second clamp capable of gripping and releasing an electric wire and movable along a longitudinal direction of the electric wire, and a covering portion of the electric wire by sandwiching the electric wire at both end positions of an intermediate strip region. A pair of cutting blades for cutting, and a pair of cutting groove forming blades for cutting the covering portion of the electric wire in the intermediate strip region from one end side to the other end side along the longitudinal direction of the electric wire. In the intermediate strip device, the cutting groove forming blade body has a cutting blade having a blade portion that is gradually thickened rearward with respect to a covering portion cutting direction of the electric wire, and the covering portion. A cutting groove forming blade body in an intermediate strip device, comprising: a guide body having a V-groove-shaped wire guide groove arranged on the front side of the cutting blade with respect to the cutting direction.