JP6666777B2 - Cutting punch for slide fastener service tooth forming equipment - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting punch used for shearing in a tooth forming apparatus for a slide fastener for shearing a wire for a tooth.

  As an example of the above-described slide fastener working tooth forming apparatus, there is an apparatus provided with a cutting die and a cutting punch that are relatively slidable for shearing a wire for working teeth (Patent Document 1). In the shearing process, the wire for the tooth is supplied from the cutting die side to the cutting punch side, and the cutting punch is relatively approached to the tip of the wire for the tooth so that the tip of the wire for the tooth is moved. Shearing is performed in cooperation with a cutting punch and a cutting die to produce a tooth material.

  Further, the cutting punch in Patent Document 1 has a sliding contact surface with a cutting die and a blade tip surface crossing the sliding contact surface. The blade tip surface is provided with a shearing portion at the center of the width thereof, which shears the wire for a working tooth from its head side. The shearing portion has a concave shape that collides with the outer peripheral surface of the wire rod for a working tooth, and is a smooth surface orthogonal to the sliding contact surface.

  By the way, when the wire for working teeth is sheared by the cutting punch of Patent Document 1, as shown in FIG. 8, the working teeth material 93 separated from the working wire 92 is plastically deformed by the impact of the cutting punch 91, and the working teeth are deformed. The phenomenon that the thickness on the outer peripheral surface side of the material 93 becomes large occurred.

  Further, as another example of a conventional cutting die for suppressing such a phenomenon, there is one in which a shearing portion is formed on a step-like surface (Patent Document 2). More specifically, the shearing portion includes, as its portions, a shearing main body portion located on the sliding contact surface side, and an adjacent portion located adjacent to the shearing main body portion and separated from the sliding contact surface, It is known that a portion adjacent to the inner surface of the main body protrudes toward the inside of the concave shape over the entire circumference in the circumferential direction of the concave shape.

Chinese Patent Application Publication No. 103386448 Chinese Utility Model No. 20468168

However, the cutting punch of Patent Document 2 has insufficient durability. More specifically, when the cutting punch of Patent Literature 2 is used, a portion of the adjacent portion that presses the head side of the tooth wire is easily broken, and in particular, the head portion of the tooth wire is pressed. The inventor has noticed that the central portion of the portion (the central portion in the circumferential direction of the concave shape) is easily damaged. This suggests that the impact of shearing when the tip of the wire for plastic deformation is plastically deformed is greater in the part that presses the head side of the wire for work than in the part that presses the pair of legs. Things.
In addition, depending on the damage state of the adjacent part, the shape of the damaged part may be transferred to the outer peripheral surface of the wire for the next time due to shearing after the next time, and the quality of the wire for the tooth will be deteriorated. . More specifically, the case where the quality of the wire rod for the toothbrush becomes inferior is, for example, a case where the adjacent portion is peeled off and the shearing body portion is peeled off in a portion adjacent to the peeled portion accordingly. .

  SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to make the thickness of a tooth material formed by shearing as uniform as possible and to improve the durability of a cutting punch.

The cutting punch of the slide fastener working tooth forming device of the present invention is a blade part that shears together with the cutting die a working tooth wire having a pair of legs bifurcated from the head. A blade portion slidable relatively to the first linear direction is provided. The blade portion has a sliding contact surface that slides on the cutting die and a blade tip surface that intersects the sliding contact surface. The blade tip surface is provided with a shearing portion for shearing the wire rod supplied from the cutting die side toward the blade portion side in the second linear direction orthogonal to the sliding contact surface from the head side. . The shear portion has a concave shape recessed in the first linear direction, and a shear main body portion located on the sliding contact surface side in the second linear direction, and a second linear direction adjacent to the shear main body portion. And an adjacent portion located on a side separated from the sliding contact surface. The shearing body includes a head collision surface that collides with the head and a pair of leg collision surfaces that collide with a pair of legs, as collision surfaces that collide with the outer peripheral surface of the tooth rod. The adjacent portion has a smooth surface extending smoothly in the second linear direction from the concave central portion of the head impact surface in the second linear direction, and a step from the impact surface on both sides of the concave circumferential surface with respect to the smooth surface. Bei example a pair of holding portions for pressing the distal end surface of the coupling element for wire with projecting Jo, a pair of leg portions collision surface, viewed from the second linear direction, from the extension direction of the pair of head impact surface Are also located on the outside, and the pair of pressing portions are, when viewed from the second linear direction, a pair of boundary pressing portions located at a portion corresponding to a boundary portion between the head collision surface and the pair of leg collision surfaces. It has a unit .

Further, the positions of the pair of pressing portions are specified in relation to the smooth surface, and may be any portions as long as they are both sides in the circumferential direction of the concave shape with respect to the smooth surface. In order to make the thickness of the tooth material formed by shearing the wire as uniform as possible, it is desirable to perform the following 1) to 2) .
1) The smooth surface is located at a portion corresponding to the central portion in the circumferential direction of the head collision surface when viewed from the second linear direction, and the pair of pressing portions are provided on both sides in the circumferential direction of the head collision surface. It is to provide a pair of head holding parts located at corresponding parts.

Further, the length of the pair of head pressing portions protruding from the collision surface does not matter, but it is desirable to perform the following in order to improve durability.
In other words, the length of the pair of head pressing portions protruding from the collision surface increases as the distance from the center in the circumferential direction of the head collision surface increases in the circumferential direction.

2) The smooth surface is located at a portion corresponding to the central portion in the circumferential direction of the head collision surface when viewed from the second linear direction, and the pair of pressing portions are provided on both sides in the circumferential direction of the head collision surface. A pair of head holding parts, comprising: a pair of head holding parts that are located; and a pair of leg holding parts that are located at portions corresponding to the pair of leg collision surfaces. That is, the pair of leg pressing portions is longer than the pair of leg pressing portions.

According to the cutting punch of the present invention, the smooth surface of the adjacent portion is the one that smoothly extends in the second linear direction from the central portion in the circumferential direction of the concave portion of the head collision surface of the shear body. However, it is not normally possible to assume that the smooth surface or the vicinity of the smooth surface of the shear main body is peeled off due to the impact of shearing, and then a pair of pressing portions are formed on both sides in the circumferential direction having a concave shape with respect to the smooth surface. As it protrudes stepwise from the collision surface at the time, it will hold down the front end of the wire for shearing during shearing, and the head of the wire for working tooth will be plastically deformed compared to a case without a pair of holding parts As a result, the thickness of the tooth material formed by shearing can be made as uniform as possible, and the durability of the cutting punch can be improved . In addition, according to the cutting punch of the present invention, the pair of leg collision surfaces are located outside the extension direction of the pair of head collision surfaces when viewed from the second linear direction, so that when the shearing is performed, Since the boundary between the leg and the head is more difficult to deform plastically than the pair of legs, the part that is difficult to plastically deform can be firmly pressed, thereby damaging the pair of pressing parts This makes it difficult to cut and improves the durability of the cutting punch.

  In addition, according to the cutting punch having the pair of head pressing portions, the pair of head pressing portions are located at portions corresponding to both circumferential sides of the head collision surface, so that when the shearing is performed, the wire rod for the tooth lock is cut. The pair of head pressing portions presses the vicinity of the portion where plastic deformation is most likely to occur, and as a result, the thickness of the tooth lock material becomes as uniform as possible.

  According to a cutting punch in which the length of the pair of head pressing portions protruding from the collision surface is increased from the center in the circumferential direction of the head collision surface in the circumferential direction, the pair of heads is While increasing the strength of the part holding part, the part that is not easily plastically deformed can be firmly held, thereby making it difficult for the pair of head holding parts to be damaged and improving the durability of the cutting punch.

  According to the cutting punch, in which the pair of pressing portions include a pair of head pressing portions and a pair of leg pressing portions, the length of the pair of legs protruding from the collision surface is more than that of the pair of head pressing portions. Since the part holding parts are lengthened, it is possible to firmly hold the parts that are hardly plastically deformed, thereby making it difficult for the pair of holding parts to be damaged, and improving the durability of the cutting punch.

It is a perspective view showing the state where the cutting punch of a first embodiment of the present invention was seen from the bottom side. (A), (B) and (C) are a plan view, a left side view, and a bottom view showing the cutting punch of the first embodiment. (A) and (B) are a front view and a sectional view taken along line AA of the cutting punch of the first embodiment. It is explanatory drawing which shows the relationship between the cutting punch of 1st embodiment and the wire for service teeth seen from the bottom surface side. It is sectional drawing which shows the use condition of the cutting punch of 1st embodiment. It is a perspective view showing an example of a slide fastener working tooth forming device. It is a top view which shows an example of a slide fastener working tooth forming apparatus. It is sectional drawing which shows the use condition of the conventional cutting punch.

  The tooth wire 6 processed by the slide fastener tooth forming apparatus is made of, for example, metal and has a substantially Y-shaped cross section as shown in FIG. 4, and has a head 6a and a bifurcation from the head 6a. And a pair of legs 6b, 6b that branch off symmetrically.

  FIG. 7 shows a state in which an example of the tooth engaging device is viewed from directly above. In order to describe the tooth engaging device of the first embodiment of the present invention, the directions are defined as follows. The directions of the three orthogonal straight lines are referred to as first, second, and third linear directions. In addition, for easy understanding, the first linear direction is referred to as the front-back direction, and is the left-right direction in FIG. The front direction is the right direction in FIG. 7, and the rear direction is the left direction in FIG. The second linear direction is referred to as a vertical direction, and is a direction orthogonal to the paper surface of FIG. The upward direction is a direction facing the near side in the direction orthogonal to the plane of FIG. 7, and the downward direction is a direction facing the back side in the direction orthogonal to the plane of FIG. The third linear direction is referred to as the left-right direction, and is the up-down direction in FIG. The left direction is the downward direction in FIG. 7, and the right direction is the upward direction in FIG.

  As shown in FIGS. 5 to 7, the tooth-forming device according to the first embodiment of the present invention includes a shearing portion 2 that shears a wire 6 for the tooth-forming and forms a tooth-forming material 7, A head processing portion 3 for forming a meshing convex portion 7c and a meshing concave portion 7d on a head portion 7a, and a mounting processing portion 4 for attaching the tooth material 7 having the meshing convex portion 7c and the meshing concave portion 7d to a fastener tape 8; Is provided.

  The shearing section 2 includes a cutting die 10 for passing the wire 6 for the tooth, a ram 15 aligned straight behind the cutting die 10, and a wire feeder for the tooth that supplies the wire 6 for the tooth upward (illustrated). And a cutting punch 20 that is disposed above the ram 15 and the cutting die 10 and that is slidable in the front-rear direction with respect to the ram 15 and the cutting die 10. Then, the shearing section 2 forms the tooth engaging material 7 by shearing the front end (upper end) of the tooth engaging wire 6 in cooperation with the cutting die 10 and the cutting punch 20.

  The ram 15 is attached to a frame (not shown) so as to be able to linearly reciprocate in the front-rear direction. Further, the ram 15 includes a housing portion 16 which is opened forward and penetrates in a vertical direction. The ram 15 houses the cutting die 10 at the back of the housing portion 16 and forms the head processing portion 3 in front of the cutting die 10. The die 30 is accommodated.

The cutting die 10 includes a spacer 11 housed in a rear portion of the ram 15 and a cutting die main body 12 housed in a front portion thereof. Between the spacer 11 and the cutting die body 12, there is formed a wire rod insertion hole 13 through which the tooth wire 6 is inserted. The wire insertion hole 13 penetrates in the up-down direction and regulates the tooth wire 6 so as not to be movable in the front-rear direction and the left-right direction. In the illustrated example, the wire insertion hole 13 has a Y-shape slightly larger than the tooth wire 6. The hole has a sectional shape.
The upper surface 12a of the cutting die body 12 and the upper surface 11a of the spacer 11 are sliding contact surfaces with the cutting punch 20, and are planes extending in the front-rear direction and the left-right direction. The sliding surface 12a of the cutting die body 12 is located at a position higher than the sliding surface 11a of the spacer 11, which corresponds to the shape of the cutting punch 20.

  The cutting punch 20 is fixed to the frame. Further, as shown in FIGS. 1 to 7, the cutting punch 20 is slidable in the front-rear direction relative to the ram 15 and the cutting die 10 aligned in the front-rear direction, and also shears the wire 6 for the engagement tooth. 21, a chamfered blade portion 28 protruding downward from the blade portion 21 and chamfering the tooth wire 6 by concavely leading it before shearing, and a fixing portion 29 for fixing the rear portion of the blade portion 21 to the frame. And

  The fixing portion 29 has a through hole 29a that protrudes upward from the rear portion of the blade portion 21 and penetrates in the front-rear direction. Bolts (not shown) are inserted through the through holes 29a, and are bolted to the frame.

  The chamfering blade portion 28 is a central portion in the left-right direction of the lower surface of the rear portion of the blade portion 21 and protrudes downward from the rear of the front end (front end). Is a short plate. The chamfering blade 28 includes a plate-shaped chamfering blade main body 28a, and a pressing portion 28b that protrudes forward from the front surface of the chamfering blade main body 28a and presses against the tooth wire 7. When viewed from the side, the pressing portion 28b has the middle portion in the vertical direction most protruding forward, and is inclined so as to go rearward as it goes upward and downward. The lower surface 28c of the chamfer blade 28 is a sliding surface that slides on the cutting die 10 (spacer 11) and is a plane extending in the front-rear direction and the left-right direction.

The blade portion 21 is plate-shaped, and has an upper surface (upper surface) and a lower surface (lower surface) that match the thickness direction. The surface (lower surface) on the side of the ram 15 is a sliding contact surface 21a that is in sliding contact with the ram 15 and the cutting die 10 (the cutting die body 12). The sliding contact surface 21a is a plane extending in the front-rear direction and the left-right direction in the illustrated example. Further, the blade portion 21 includes a blade tip surface 21b which crosses the slide contact surface 21a and faces forward in addition to the slide contact surface 21a (lower surface) and the upper surface.
The blade tip surface 21b is a surface that faces the direction in which the tooth wire 6 approaches when shearing, and a shear portion 22 that shears the tooth wire 6 from the head 6a side in the center in the left-right direction. Is provided.

  The shear portion 22 has a concave shape recessed rearward and forms an internal space inside thereof, and the internal space penetrates in the vertical direction which is also the penetrating direction of the wire insertion hole 13, When shearing, the wire 6 is opened in a direction in which the tooth wire 6 relatively approaches, that is, in a forward direction. The shearing portion 22 has, as its parts, a lower portion 23 that is the sliding contact surface 21a side in the vertical direction, and an upper portion 24 (a portion above the upper end of the lower portion 23) that is separated from the sliding contact surface 21a. Is provided. The lower portion 23 is a portion that collides with the tooth wire 6 at the time of shearing, and is hereinafter referred to as a shear main body 23. In addition, the upper portion 24 is a portion adjacent to the shear main body portion 23, and is hereinafter referred to as an adjacent portion 24.

  The shearing main body 23 is a collision surface 23 that collides with the outer peripheral surface (the rear surface and the left and right side surfaces) of the wire rod 6 for a tooth engagement, and is a surface parallel to the vertical direction. Further, the shearing body 23 has a concave shape concaved rearward to collide with the head 6a of the tooth wire 6 and the pair of legs 6b, 6b. The head collision surface 23a collides with the head collision surface 23a, and a pair of leg collision surfaces 23b, 23b located forward of the head collision surface 23a and colliding with the pair of legs 6b, 6b.

The head collision surface 23a has a U-shaped concave shape as viewed from below toward the rear.
As shown in FIG. 4, the pair of leg collision surfaces 23b, 23b has a shape in which the left and right distance W is widened from the rear end (the front end of the head collision surface 23a) to the front end. It is located outside the extension direction L of the pair of head collision surfaces 23a. Specifically, the pair of leg collision surfaces 23b, 23b is inclined with respect to the left-right direction, and the inclination angle of the front end 23c is different from that of the rear portion 23d. Due to the difference in the inclination angle, the ratio of the width W of the pair of leg portion collision surfaces 23b, 23b, 23b, 23b on the left and right sides increases toward the front, and the ratio of the rear portion 23d is larger than that of the front end 23c. .

The adjacent portion 24 includes a smooth surface 25 extending smoothly upward from a concave central portion of the head impact surface 23 a and a concave surface with respect to the smooth surface 25. It has a pair of pressing portions 26, 26 that protrude in a stepped manner and that hold down the front end surface (upper end surface) of the wire rod 6 for tooth engaging.
In other words, the smooth surface 25 is, in other words, a flat and smooth surface of the head collision surface 23a that is parallel to the vertical direction and extends upward and parallel from the upper end of the circumferential central portion. Yes, refers to a surface with no irregularities to the naked eye. Therefore, the central part in the circumferential direction of the concave portion of the shear portion 22 is a flat and smooth one surface in which the smooth surface 25 and the head collision surface 23a continuously extend in the vertical direction.

  The pair of pressing portions 26, 26 are symmetrical left and right, and a pair of head pressing portions 26a, 26a located at portions corresponding to both side portions in the circumferential direction (direction along the U-shape) of the head collision surface 23a. A pair of leg pressing portions 26b, 26b located at portions corresponding to the pair of leg collision surfaces 23b, 23b, and a boundary between the head collision surface 23a and the pair of leg collision surfaces 23b, 23b. With parts. In other words, it includes a pair of boundary pressing portions 26c, 26c located at the boundary between the head pressing portion 26a and the leg pressing portion 26b on both the left and right sides. The pair of holding portions 26, 26 have lower surfaces (surfaces for holding the distal end surfaces of the wire rods 6) and upper surfaces thereof formed as horizontal planes parallel to the front-rear and left-right directions, and have a concave internal space side when viewed from above and below. The surface facing is defined as a vertical surface parallel to the vertical direction.

  Since the head holding portion 26a is located at a portion corresponding to the side in the circumferential direction of the head collision surface 23a, the head pressing portion 26a extends substantially parallel to the front-rear direction and has a length protruding perpendicular to the collision surface 23. The length is made longer as the distance from the center part (rear end) of the head collision surface 23a in the circumferential direction (rear end) increases in the circumferential direction (toward the front end). Therefore, the portion of the head holding portion 26a where the protruding length becomes the maximum value is the end (front end) on the leg holding portion 26b side. More specifically, assuming that the protruding state of the head pressing portion 26a is a similar shape smaller than the concave shape of the shearing main body portion 23 viewed from above and below, as the head pressing portion 26a approaches the front end in the circumferential direction, It protrudes to a position corresponding to a small similar shape.

  Since the leg pressing portion 26b is located at a portion corresponding to the leg collision surfaces 23b, 23b, the leg pressing portion 26b is inclined so as to be further away from the center in the left-right direction of the concave shape toward the front, so that the collision occurs. The length protruding perpendicularly to the surface 23 is increased as the distance from the concave head impact surface 23a side (rear end) increases in the circumferential direction (as it goes forward). Therefore, it is the end (rear end) on the side of the head pressing portion 26a of the leg pressing portion 26b that has the shortest protruding length of the leg pressing portion 26b. It is also the end (front end) of the leg holding portion 26b side of 26a. On the other hand, the protruding length is the longest value at both ends (front ends) of the pair of leg pressing portions 26b, 26b in the circumferential direction of the concave shape. Direction dimension). In addition, the ratio of the length of the protruding portion toward the front with respect to the protruding length is greater at the front end portion 26d of the leg holding portion 26b than at the rear portion.

  The boundary portion pressing portion 26c projects in a triangular shape toward the inside of the concave shape when viewed from the up and down direction, and is larger than the head pressing portion 26a and the leg pressing portion 26b located on both sides in the circumferential direction. The length projecting perpendicularly to the collision surface 23 is increased. As a specific example, the length of the front end of the boundary pressing portion 26c protruding from the collision surface is 1 mm (dimension in the left-right direction).

The above-mentioned shearing processing part 2 shears the wire 6 for working teeth as follows.
1) The tooth wire 6 protrudes upward from the sliding contact surface 12a of the cutting die body 12 by one thickness of the tooth material 7. At this time, the ram 15 is set at the forward limit position.
2) The ram 15 retreats from the forward limit position. The cutting die 10 and the forming die 30 are also retracted together with the retraction of the ram 15.
3) While the ram 15 is retracting, the shearing body 23 of the cutting punch 20 collides with the rear surface of the upper end of the tooth wire 6 as shown in FIG. 5, and the cutting die 10 and the cutting punch 20 cooperate. The upper end portion of the wire rod 6 is sheared, and the tooth material 7 is cut off.

At the time of this shearing, the wire rod 6 for a working tooth collides with the shearing body 23 (collision surface), and the head 6a particularly tends to deform in the thickness direction (vertical direction). However, the pair of pressing portions 26, 26 of the adjacent portions 24 press the distal end surface (upper end surface) of the wire rod 6 for shearing in the case of shearing, and are compared with those without the pair of pressing portions 26, 26. Thus, the amount of plastic deformation of the head 7a of the tooth material 7 can be suppressed. As a result, the thickness of the tooth material 7 formed by the shearing process is made as uniform as possible, and the durability of the cutting punch 20 is improved. In addition, since the pair of holding portions are formed in a portion other than the portion where the tooth wire 6 is most likely to be deformed by the impact at the time of shearing, it is difficult to be damaged, and the smooth surface 25 and the A situation in which the vicinity of the surface 25 peels cannot usually be assumed.
More specifically, the method of pressing by the pair of pressing portions 26, 26 is as follows: (1) A pair of head pressing portions 26a is located at the vicinity of the position where the plastic deformation is most likely to occur in the wire 6 for shearing during shearing. , 26a, and (2) the length of the pair of head pressing portions 26a, 26a protruding from the shearing main body portion (collision surface) 23, from the center in the circumferential direction of the head collision surface 23a. In the direction away from each other, the strength of the pair of head pressing portions 26a, 26a is increased, and the portions that are not easily plastically deformed are strongly pressed. (3) The pair of leg collision surfaces 23b, 23b when viewed from above and below. Are located outside the direction in which the pair of head collision surfaces 23a extend, so that the boundary between the leg 6b and the head 6a in the tooth wire 6 at the time of shearing is formed by a pair of legs. It is harder to plastically deform than the portions 6b, 6b, It becomes firmly pressed it a difficult portion plastically deformed by the boundary portion pressing portion 26c, 26c.

  As shown in FIG. 6, the head processing part 3 is aligned with the cutting punch 20 which is also a part of the shearing processing part 2 in the front direction with respect to the cutting die 10 and in the front-rear direction with respect to the cutting punch 20. A forming die 30 that is relatively slidable, a forming punch 32 that is disposed to be spaced forward from the cutting punch 20 and that can reciprocate up and down with respect to the forming die 30; And a pressure pad 34 that is arranged to be separated from the front in the front and that can reciprocate up and down with respect to the forming punch 32. Then, the head processing section 3 forms the engaging projection and the engaging recess by plastically working the head 7a of the tooth material 7 in cooperation with the forming die 30 and the forming punch 32. When pressing, the pair of legs of the tooth lock material 7 is pressed.

  The forming punch 32 and the pressure pad 34 are attached to the frame so as to be able to linearly reciprocate up and down. The forming die 30 is attached to the frame so as to be able to linearly reciprocate in the front-rear direction. As shown in FIG. 5, the forming die 30 is provided with a sliding surface 30a on the upper surface thereof for contact with the cutting punch 20. The forming die portion 31 is recessed downward at the front end of the upper surface and accommodates the tooth material 7. Is provided.

After the processing of 3) in the shearing section 2, the head processing section 3 plastically processes the tooth material 7 as follows.
4) When the ram 15 is further retracted after the tooth cutting material 7 is cut off at the shearing portion 2, the tooth cutting material 7 is pushed out while being in contact with the shearing portion 22 of the cutting punch 20.
5) When the ram 15 reaches the retreat limit position, the tooth lock material 7 reaches directly above the forming die portion 31 of the forming die 30. At this time, the pressing portion 28b of the cutting punch 20 collides with the tooth rod 6 and the tooth wire 6 is depressed. By this dent, the lower surface and the upper surface which become the tooth material 7 to be formed by shearing are chamfered, and the deepest part of the depressed portion is equivalent to one tooth material from the upper end of the tooth wire 6. This is the position of the thickness. Subsequently, the forming punch 32 and the pressure pad 34 descend from above the molding die portion 31, the pressure pad 34 regulates the pair of legs 7 b, 7 b, and the forming punch 32 moves the head 7 a of the tooth material 7. It is pushed toward the bottom surface of the molding die portion 31, and a meshing convex portion 7c and a meshing concave portion 7d are formed on the head portion 7a. Note that the forming punch 32 and the pressure pad 34 do not contact the pair of pressing portions 26 of the cutting punch 20.
6) The forming punch 32 and the pressure pad 34 rise.

  As shown in FIGS. 5 and 6, the mounting processing part 4 is a part of the head processing part 3, and the intermittent supply of the fastener tape 8 in an upward direction in front of the forming die 30. And a pair of leg portions of the tooth feeder 7 which is disposed above and below the forming die 30 with an interval in the left-right direction above the forming die 30 and is formed with the meshing convex portion 7c and the meshing concave portion 7d. 7b, a pair of side punches 40, 40 fixed to the fastener tape 8 with the 7b interposed therebetween.

After the processing 6) in the head processing section 3, the mounting processing section 4 mounts the tooth material 7 to the fastener tape 8 as follows.
7) The ram 15 moves forward, and the cutting die 10 and the forming die 30 move forward before and after the processing of 6) in the head processing section 3, that is, the processing of raising the forming punch 32 and the pressure pad 34, The front end of the forming die 30 is moved closer to the fastener tape 8. The ram 15 reaches the forward limit position. When the ram 15 is at the forward limit, a pair of legs 7b, 7b of the tooth lock material 7 housed in the molding die 31 are disposed on the left and right sides of the fastener tape 8, and a pair of side punches 40, 40 are provided. Are arranged on the left and right sides of the pair of legs 7b, 7b.
8) The pair of side punches 40, 40 pushes the pair of legs 7b, 7b so as to narrow the space between them, and the fastener tape 8 is sandwiched between the pair of legs 7b, 7b.
9) The fastener tape 8 rises by a predetermined length and stops.
10) When the ram 15 moves forward as in 7), the shearing portion 22 of the cutting punch 20 separates from the tooth lock material 7, and when the ram 15 reaches the forward limit, the wire 6 for the tooth locking is located in front of the shearing portion 22. It can be supplied. Then, a wire rod supplying device (not shown) supplies the wire rod 6 for the working tooth above the sliding contact surface 12a of the cutting die body 12 by the thickness of one tooth material. Then, the state returns to 1) in the shearing section 2.
11) Thereafter, steps 2) to 10) are repeated, whereby the tooth lock material 7 is attached to the fastener tape 8.

The present invention is not limited to the above embodiment, and can be appropriately modified without departing from the gist of the present invention.
For example, in the above embodiment, the slide fastener working tooth forming apparatus 1 includes the shearing section 2, the head processing section 3, and the mounting section 4, but the present invention is not limited to this. May be provided with only one, or may be provided with a shearing part and a head processing part (without attaching processing part).
Further, in the above embodiment, the slide fastener working tooth forming apparatus 1 enables the ram 15, the cutting die 10, and the forming die 30 to reciprocate linearly collectively, whereby the shearing processing section 2, the head processing section 3, and the mounting processing section. 4 in the first linear direction, but the present invention is not limited to this, and the head processing part and the mounting processing part deviate from the first linear direction with respect to the shearing part. It may be prepared for a place.

REFERENCE SIGNS LIST 1 tooth engaging device 2 shearing portion 6 tooth engaging wire 6a head 6b leg 7 tooth engaging material 7a head 7b leg 7c meshing convex portion 7d meshing concave portion 8 fastener tape 10 cutting die 11 spacer 11a sliding contact surface 12 Cutting die body 12a Sliding surface 13 Wire insertion hole 15 Ram 16 Housing 20 Cutting punch 21 Blade 21a Sliding surface 21b Blade tip 22 Shearing part 23 Shearing body (collision surface)
23a Head collision surface L Extension direction of head collision surface 23b Leg collision surface 23c Front end 23d Rear part W Distance between left and right of pair of leg collision surfaces 24 Adjacent portion 25 Smooth surface 26 Pressing portion 26a Head pressing Part 26b Leg holding part 26c Boundary holding part 26d Front end of leg holding part 28 Chamfering blade part 28a Chamfering blade main body part 28b Pressing part 28c Sliding contact surface 29 Fixed part 29a Through hole 3 Head processing part 30 Forming die 30a Sliding surface 31 Mold part 32 Forming punch 34 Pressure pad 4 Mounting part 40 Side punch 91 Cutting punch 92 Wire for working teeth 93 Material for working teeth

Claims (4)

A blade part (21) for shearing a wire rod (6) having a shape in which a pair of legs (6b, 6b) is bifurcated from a head part (6a) in cooperation with a cutting die (10); The blade (21) slidable in a first linear direction relative to the cutting die (10);
The blade portion (21) includes a sliding surface (21a) that slides on the cutting die (10), and a blade tip surface (21b) that intersects the sliding surface (21a),
The blade tip surface (21b) is supplied in a direction from the cutting die (10) side toward the blade portion (21) side in a second linear direction orthogonal to the sliding contact surface (21a). A shear portion (22) for shearing the wire rod (6) from the side of the head (6a);
The shearing portion (22) has a concave shape recessed in the first linear direction, and a shearing body portion (23) positioned on the sliding contact surface (21a) side in the second linear direction; An adjoining portion (24) located adjacent to the shearing body and located on a side of the second linear direction that is separated from the sliding contact surface (21a);
The shearing body (23) includes a head collision surface (23a) that collides with the head (6a) as a collision surface that collides with an outer peripheral surface of the tooth wire (6), and a pair of the leg portions. (6b, 6b) and a pair of leg collision surfaces (23b, 23b),
The adjacent portion (24) includes a smooth surface (25) extending smoothly in the second linear direction from a central portion of the concave shape in the circumferential direction of the head collision surface (23a), and the smooth surface (25). e Bei a pair of pressing portions for pressing the distal end surface (26, 26) of said coupling element for wire (6) while projecting from the collision surface stepped on both sides of the concave circumferential direction with respect to),
The pair of leg collision surfaces (23b, 23b) are located outside the extension direction (L) of the pair of head collision surfaces (23a) when viewed from the second linear direction,
The pair of pressing portions (26, 26) correspond to a boundary portion between the head collision surface (23a) and the pair of leg collision surfaces (23b, 23b) when viewed from the second linear direction. A cutting punch for a slide fastener working tooth molding device, comprising a pair of boundary pressing portions (26c, 26c) located at the portions . The smooth surface (25) is located at a portion corresponding to a central portion in a circumferential direction of the head collision surface (23a) when viewed from the second linear direction,
The pair of pressing portions (26, 26) includes a pair of head pressing portions (26a, 26a) located at portions corresponding to both circumferential sides of the head collision surface (23a). The cutting punch of the device for forming a working tooth of a slide fastener according to claim 1.   The pair of head pressing portions (26a, 26a) increases the length protruding from the collision surface as the distance from the center in the circumferential direction of the head collision surface (23a) increases in the circumferential direction. 3. The cutting punch for a slide fastener working tooth forming apparatus according to claim 2, wherein the cutting punch is provided. The smooth surface (25) is located at a portion corresponding to a central portion in a circumferential direction of the head collision surface (23a) when viewed from the second linear direction,
The pair of pressing parts (26, 26) are composed of a pair of head pressing parts (26a, 26a) located on both circumferential sides of the head collision surface (23a), and a pair of leg collision surfaces. (23b, 23b) and a pair of leg pressing portions (26b, 26b) located at portions corresponding to (23b, 23b),
3. The pair of leg holding portions (26 b , 26 b ) is longer than the pair of head holding portions (26 a, 26 a) with respect to the length protruding from the collision surface. serial mounting of the slide fastener janitorial cutting punch tooth forming device 3.

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