JPS6032314B2 - Continuous terminal crimping machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is capable of feeding a covered wire to a predetermined size, cutting the covered wire, stripping the cut end of the covering, and crimping a terminal to the rear of the stripped end. , relates to an improvement of a continuous terminal crimping machine that performs continuous and automatic terminal crimping.

Conventionally, the cutting blade group consisting of a set of two opposing core wire cutting blades and a set of two coated cutting stripping blades arranged in parallel on both sides of the core wire cutting blades is opened and closed, and wire feeding means is used as appropriate. The coated wire fed from the stock roll between the cutting blade groups is cut to a predetermined size, and coating cuts are made on both sides of the cut portion, and then wire clamping devices disposed above and downstream of the cutting blade groups are used. The cut coating is stripped off by pulling the wire toward the side opposite to the cutting blade group, and the coating of the coated wire is stripped by swinging the upstream and downstream wire clamping devices in a direction perpendicular to the wire feeding direction. There is a continuous terminal crimping machine in which a terminal part is moved directly above a crimping bed of a terminal crimping device disposed on the side of a group of cutting blades, and terminals are continuously affixed to this part.

By the way, as shown in FIGS. 1 and 2, the continuous terminal crimping machine described above has a passage formed immediately downstream of the cutting blade group 1 extending along the wire rod feeding axis L' and gradually expanding from the intermediate part toward the upstream side. A fixed wire guide tube 2 with a hole is provided to ensure reliable wire feed along the wire feed trajectory L. Further, the downstream wire rod clamping device 3 includes a fixed horizontal ball 3a extending in the wire feed direction on the side surface of the machine below the front surface of the terminal crimping device 4, and the fixed horizontal shaft 3a.
A disc-like iron body 3b is iron-clad on the shaft so as to be movable in the rutting direction and the rotational direction with respect to a, and the base end is fixed to the outer periphery of the side body 3b and is perpendicular to the wire feeding direction. An extending arm 3c;
It consists of a pair of gripping claws 3d attached to the tip of the arm 3c so as to be able to open and close upward.

Therefore, the downstream wire clamping device 3 has the gripping claws 3
d, the covered wire W is cut on the downstream side of the fixed wire guide tube 2.
, the distance from the gripping position to the distal end of the rear end side sheathing stripping end inevitably becomes long due to the presence of the fixed wire guide tube 2.

Therefore, while the wire clamping device 3 is transferring the cut covered wire W to the front surface of the terminal crimping layer 4, the covered wire W is
Particularly in the case of weak pongee wire, it hangs downward and may get caught on the crimp bed 4a of the terminal crimping layer 4 or the terminal T placed on the bed 4a, resulting in a situation where the terminal T is crimped dry.

In view of the above-mentioned circumstances, the present invention uses an elastic material that guides the moving wire from the side of the cutting blade group to the front surface of the terminal crimping layer along the wire movement locus between the downstream wire clamping device and the terminal crimping layer. Further, in order to gently pinch the wire rod immediately downstream of the wire rod guide and in front of the terminal crimping device, a wire rod positioning member is provided, which comprises a pair of opening/closing arms and a clamping portion provided at the tip of the arm. A device is installed to position the rear-end sheathed end of the cut sheathed wire transferred by the downstream wire clamping device at a predetermined position above the crimping bed in both the vertical and horizontal directions, and when crimping the terminal, a crimping die is used. The wire rod guide swings downward due to the force of pushing down the wire rod, and the wire rod, which is loosely held by the supporter, is allowed to escape downward, thereby avoiding sudden bending of the covered wire end, and ensuring a good terminal at all times. It is an object of the present invention to provide a continuous terminal crimping machine that is capable of crimping. below,
The present invention will be explained in detail based on the embodiments shown in FIGS. 3 to 7.
10 is a stock roll of coated wire W; 11 is a movable table movable in the bran feeding direction on the machine stand 12;
A set of two wire feed rollers 13 and an upstream wire clamping device 14, which are connected to a wire rod (not shown), are used.

Reference numeral 15 denotes a group of cutting blades that can be opened and closed and installed on the machine stand 12 downstream of the movable table 11, which includes a set of two core wire cutting blades 15a, 15a2 and the cutting blades facing each other with the wire feeding axis as the boundary. A set of two coated cutting and stripping blades 150, 15Q, 15c arranged in parallel and facing each other on both sides. , 15c2.

Reference numerals 16 and 17 indicate upstream and downstream sides that are fixed on the machine base 12 along the wire rod feeding axis between the movable table 11 and the cutting blade group 15 and immediately downstream of the cutting blade group 15, respectively. Among the wire rod guide tubes, the downstream wire rod guide tube 17 gradually expands from the middle portion toward the upstream side so as to reliably receive the tip of the coated wire W that is fed through the cutting blade group 15. It is formed into a shape.

Reference numeral 18 denotes a terminal crimping layer installed on the machine base 12 in a direction perpendicular to the wire feeding direction of the cutting blade group 15, on which a terminal supply reel 18a and a terminal T fed out one by one from the reel 18a are placed. Crimp bed 18b; Crimp bed 18b
It consists of a crimping die 18c, etc., which is arranged appropriately above the crimping bed 18c and descends toward the crimping bed 18b at the appropriate time.

Reference numeral 19 denotes a downstream wire clamp device provided on the side of the machine stand 12 downstream of the cutting blade group 15, the downstream wire guide tube 17, and the terminal crimping layer 18, and has the following configuration.

That is, the downstream wire clamping device 19 has a fixed horizontal shaft 19b fixed at both ends so as to extend in the wire feeding direction to the side surface of the machine base 12 via a bracket 19a directly below the front surface of the crimping bed 18b, and the fixed horizontal shaft 19b. 19b, a donut disc-shaped iron body 19c is covered with rattan so as to be movable in the axial and rotational directions; an arm 19d extending to
a pair of gripping claws 19f attached via e, a rotation mechanism 19g that rotates the iron housing 19c around a fixed horizontal axis 19b, and a rotation mechanism 19g that rotates the iron housing 19c along the horizontal axis 19b.
It consists of a horizontal slider 19h for sliding the slider 9c. The horizontal rotating device 19g is composed of a short arm 199 protruding from the circumferential surface of the iron body 19c, and a push rod 19g2 pivotally connected to the tip of the short arm with a ball joint, and the base end of the shaft of the push rod 19 is By vertical movement of the push rod 19& by a cam drive mechanism (not shown) of this machine connected to the cam drive mechanism (not shown) of the machine, the gripping center axis h of the gripping claw 19f moves from the position directly above the crimp bed 18b where it coincides with the feeding axis line date. The saddle mounting body 19c, the arm 19d, and the gripping claw 19 reach the predetermined position.
f can be rotated integrally.

In addition, the sliding machine 19M, one side of the flange was attached to the body 1.
A double poisoning roller 9h is iron-mounted to the fixed horizontal ratchet 19b so that it can be rotated integrally with the iron body with a shock saddle fixed to the side surface of the roller 9c, and a small roller 19h2 that is pivotally supported at the tip of the roller 19h. , and a rocking lever 19h3 rotatably engaged between the two flanges of the drum bar 19h3, and a cam drive mechanism (not shown) of the machine connected to the base end of the drum bar 19h3.
Due to the swing of 9h3, the troop body 19c and the arm 19
d, the gripping claw 19f, etc. are moved integrally in the wire feeding direction.

Reference numerals 20 denote the cutting blade group 15, the downstream wire rod guide tube 17, the terminal crimping layer 18, and the downstream wire rod clamping device 19.
The wire guide is made of one spring steel wire (for example, a piano wire), and the lower end base is attached to the upper edge of the machine base 12, which is closer to the terminal crimping layer 18 from the wire feed axis, with a bracket as appropriate. The upper part of the crimp bed 18b is formed in an arc shape toward the upper front surface of the crimp bed 18b, so that it is not moved when the arm 19d and the gripping claw 19f stop rotating toward the terminal crimp layer 18. The tip of the coated wire W can be held on the central axis h.

Reference numeral 21 denotes a wire rod positioning and holding device provided between the wire rod guide 20 and the downstream wire rod clamping device 19 on the front surface of the terminal crimping layer 18, and a pair of wire rod positioning devices 21 are boxed on the side of the machine base 12 so as to mesh with each other. A sector gear 21a, a pair of opening/closing arms 21b whose bases are fixed to the circumferential surface of the sector gear 21a and extending in a direction perpendicular to the twill material feeding direction, and a pair of opening/closing arms 21b fixed at the tips of the opening/closing arms 21b. A pair of holding members 21c,
A cam drive mechanism comprising a clamping force adjustment mechanism 21d provided at the intermediate portion of the opening/closing arm 21b, and a push rod 21f provided inside the machine and pivotally connected to a short arm 21e protruding from the one sector gear 21a. (not shown) by vertically moving the opening/closing arm 21b and the holding member 21.
It is designed to perform the opening and closing movement of c.

The retaining member 21c is made of a rectangular plate that is elongated in the distal direction and has a flat opposing surface.

Further, the clamping force adjustment mechanism 21d includes a screw prong 21d screwed from the outside of the one opening/closing arm 21b toward the other arm 21b, and a screw prong 21d for fixing and holding the screw prong 21d to the one arm 21b. When the opening/closing arm 21b is in the closed state, the tip of the screw shank 21d abuts against the inner surface of the other arm 21b, so that the supported member 21c gently pulls the covered wire W. The spacing S between the facing surfaces of both clamping members 21c is maintained to such an extent that the clamping members 21c can be held together. Therefore, the holding member 2
1c allows the covered wire W to move vertically downward while maintaining the sandwiched state when a slight force is applied from above to the covered wire W that can be held.

Further, the wire rod & path determining clamping device 21 includes the gripping claw 1
When the terminal crimping layer 9f is moved to a predetermined position on the front surface of the terminal crimping layer 18, the center wire h is arranged so as to pass through the center of the upper part of the opposing gap between the clamping members 21c in the closed state.

22 is the wire rod guide 20 and the wire rod positioning device 21;
The base end is rotatably supported on the side of the machine base 12 by a wire discharge rod provided between the wire rods, and the wire rod normally extends diagonally at right angles to the feed axis side with respect to the wire feed direction. It is curved in a semi-circular shape, and at the same time as the wire village positioning and clamping device 21 performs the opening operation, it is rotated toward the terminal crimping layer 18 by a cam drive mechanism (not shown) in the machine, and the terminal crimping layer 18 is rotated. The covered wire W is knocked out to the side and conveyed into an appropriate wire storage container C which is separated from the side of the terminal crimping layer 18.

Next, the effect will be explained.

First, the moving table 11 is in the downstream position, and the upstream wire rod clamping device 14 and the cutting blade group 15 are in the open state.

Further, the downstream wire rod clamping device 19 opens the gripping claws 19f at a position where the center axis h coincides with the wire rod feeding axis L, the wire rod positioning and clamping device 21 is in the open state, and the wire rod discharging rod 22
is retracted below the wire guide 20. Further, it is assumed that the terminal crimping device 18 has a crimping die 18c waiting at an upper position, and one terminal T has already been placed on the crimping bed 18b. Further, the clamping force adjustment mechanism 21d is adjusted in advance according to the diameter of the coated wire W so that the clamping portion village 21c gently clamps the coated wire W. When the operation is started in these conditions, the covered wire W is pulled out from the stock roll 10 by the rotational drive of the feeding roller 13, and the upstream wire rod clamping device 14, the upstream wire rod guide tube 16, the cutting blade group 15, and the downstream wire rod guide are The gripping claw 19f passes through the pipe 17.
When the feed roller 13 is fed by a predetermined amount (FIG. 1), the feed roller 13 is temporarily stopped by the action of the side length mechanism.

Next, the upstream wire rod clamping device 14 is closed, and the gripping claws 19f of the downstream wire rod clamping device 19 are also closed.
The upper and downstream parts of the covered wire W are respectively gripped.

Subsequently, the cutting blade group 15 closes and the core wire cutting blades 15a, 1
The coated wire W is cut to a predetermined size by the cutter 5a2, and cuts are made in the coated wire W on both sides of the cut portion by the coater cutting and stripping blades 150, 15Q, 16c, , 15c2.

Next, as the moving table 11 moves, the upstream wire rod clamping device 14 moves upstream, and the downstream wire rod clamping device 19 moves as the swing lever 19h3 swings in the downstream direction. 19c, arm 19d, and gripping claw 19f
and the like integrally move to the downstream side, thereby peeling off the cut coatings W of the remaining and cut coating wires W, respectively.

As a result, the downstream end of the remaining covered wire W is at a position held by the upstream wire rod guide tube 16, and the upstream end of the cut covered wire W is at a position slightly downstream from the downstream wire rod guide tube 17. is escaping. Subsequently, the cutting blade group 15 opens and the movable table 11 returns to its original position, and the upstream wire rod clamping device 14 opens and stands by.

During this time, the entire downstream wire rod clamping device 19 rotates toward the terminal crimping straight direction 18 due to the rise of the shaft of the push rod 19 .

During this rotation, the covered portion W of the cut covered wire W protruding from the gripping claw 19f is guided by the wire guide 20 to prevent it from hanging midway. When the gripping claws 19f reach the front surface of the terminal crimping mounting straight 18 and stop rotating, the twill material positioning and holding device 21 closes, clamping the covering portion W between the holder members 21c, and aligning the center axis. Position in the horizontal direction perpendicular to h. In this way, the upstream coated end of the cut coated wire W is placed exactly above the crimp bed 18b and the terminal T along the center wire h (solid lines in Figures 4 and 5, solid lines in Figures 6 and 2). dot-dashed line). From this state, the downstream wire clamping device 19 opens the gripping claws 19f, and the entire device rotates back to its original position and slides back to its original position on the upstream side.

Meanwhile, during this time, the terminal crimping layer 18 lowers the crimping die 18c. At this time, the crimping die 18c presses down the tip coating W of the coated wire W and the peeled core wire part W2 into the terminal T, and simultaneously crimps the terminal. The covering portion W, which is supported from both sides by the wire rod guide 20, moves downward against the elastic force of the wire guide 20 and the frictional force with the support member 21c. As a result, the terminal crimping can be performed with the coated wire W extending straight and in a good condition (solid line in FIG. 6). When the crimping die 18c finishes the terminal crimping operation and rises, the covered wire W with the terminal attached thereto is pushed upward against the frictional force by the elastic force of the wire guide 20, and the terminal attachment portion is pushed upward from the crimping bed 18b. Leave. Next, the wire positioning and holding device 21 performs an opening operation to release the covered wire W (FIG. 7).
Almost simultaneously with this release, the wire discharge rod 22 rotates at high speed,
Drop the covered wire W into the wire storage receiver C.

This completes one cycle of feeding the coated wire W along its side length, cutting it to a predetermined size, stripping the end coating, and pressing the indenter onto the stripped end, and the feeding roller 13 rotates again. The next cycle begins with feeding the covered wire W.

As detailed above, when using the terminal crimping machine of the present invention, the coated wire is moved along a wire guide made of an elastic material for terminal crimping to the rear end of the cut coated wire, and the wire is not drooped during the movement. This prevents the wire from getting caught, and eliminates any misalignment between the end of the wire and the terminal, especially when the wire is loosened by the wire positioning and clamping device, and allows the entire covered wire to fall during crimping, allowing the covered wire to extend straight. This makes it possible to crimp terminals in good condition.

[Brief explanation of the drawing]

Figures 1 and 2 are detailed views of the downstream wire clamping device and the terminal crimping device in a conventional continuous terminal crimping machine, and Figures 3 to 7 show an embodiment of the continuous terminal crimping machine of the present invention. Fig. 3 is an overall perspective view, Fig. 4 is an explanatory diagram of the state of the main parts before terminal crimping, Fig. 5 is a V-V lost view of Fig. 4, and Fig. 6 is an explanatory diagram of the state of the main parts when the terminal is crimped. , FIG. 7 is an explanatory view of the main parts after the terminal is crimped. In the figure, 15 is a cutting blade group, 18 is a terminal crimping layer, 19 is a downstream wire clamping device, 20 is a wire guide, 21 is a wire positioning and clamping device, W is a coated wire, and T is a terminal. Figure 1 Figure 2 Figure 6 Figure 7 Figure 3 Figure 4 Figure 5

Claims (1)

[Scope of Claims] 1 Cutting the coated wire to a predetermined size using a group of cutting blades and wire clamping devices disposed on the upstream and downstream sides, stripping off the coating on both sides of the cut portion, and further cutting the coated wire to a predetermined size, and stripping off the coating on both sides of the cutting portion, and further cutting the coated wire to a predetermined size using the cutting blade group and the wire clamping devices disposed on the upstream and downstream sides. swings in a direction substantially perpendicular to the wire feeding direction, and holds out the rear end of the cut coated wire toward the terminal crimping device disposed on the side of the cutting blade group, and crimps the terminal on the stripped end of the cut wire. The downstream wire clamping device includes an arm that is entirely movable in the wire feeding direction and rotatable within a vertical plane perpendicular to the wire feeding direction, and a distal end of the arm. It consists of a pair of gripping claws that can be opened and closed, and separately arranged between the downstream wire rod clamping device and the terminal crimping device, and extending from the side of the cutting blade group to the front side of the terminal crimping device along the wire movement locus. A wire rod guide made of an elastic material is provided to guide the moving wire between the terminals, and a wire positioning clamping device is arranged on the front surface of the terminal crimping device and is capable of loosely holding the crimped coated wire to be terminald by a clamping surface facing in the vertical direction. A continuous terminal crimping machine characterized by: 2. The wire rod guide is made of one spring steel wire, the lower end base is fixed on the machine base near the wire rod feeding axis so that the position can be adjusted freely, and the upper part is formed in an arc shape toward the upper front surface of the terminal crimping bed. 2. The continuous terminal crimping machine according to claim 1, wherein the tip of the covered wire that is moved when the arm stops rotating toward the crimping device can be held on the wire movement trajectory. 3. The wire rod positioning and holding device includes a pair of sector gears that are pivotally supported so as to mesh with each other on the side of the machine base below the front surface of the terminal crimping device, and a base portion is fixed to each of the gears, and the wire rod is rotated by the rotation of the gears. A pair of opening/closing arms that perform opening/closing movements in a vertical plane perpendicular to the feeding direction, and a flat pair of opening/closing arms that are fixedly attached to the tips of the opening/closing arms and extend approximately parallel to the vertical direction at appropriate intervals in the closed state. The series according to claim 1, comprising a pair of clamping members having opposing surfaces, and a clamping force adjustment mechanism interposed between the opening/closing arms and capable of adjusting the distance between the opposing surfaces. Terminal crimping machine. 4. The clamping force adjustment mechanism is configured such that a threaded rod is screwed from the outside of one arm of the opening/closing arm toward the other arm, and the protruding length of the threaded rod is fixed and held at a desired value by a lock nut. A continuous terminal crimping machine according to claim 3.