JPS5923633B2 - Continuous terminal crimping machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides methods for feeding a coated wire to a predetermined size, cutting the coated wire, stripping the cut end of the coat, and cutting the coated wire Ff. The present invention relates to an improvement in a continuous terminal crimping machine that continuously and automatically crimps terminals to the front end of the terminal.

Conventionally, a set of two core wire cutting blades facing each other and a set of two coated cutting strips 1n arranged parallel to each other on both sides of the core wire cutting blades have been used.
! ．． By the opening and closing movement of the cutting blade group consisting of blades, the coated wire fed between the cutting blade groups from the stock roll is cut to a predetermined size by an appropriate wire feeding means, and the coating cuts are made on both sides of the cutting portion. Then, the cut coating is stripped off by the wire tensioning action toward the opposite side of the cutting blade group by wire rod clamping devices disposed above and downstream of the cutting blade group, and further, the cut coating is stripped off by the wire rod clamping device disposed above and downstream of the cutting blade group. By swinging in a direction perpendicular to the wire feeding direction, the stripped end of the wire is moved above the crimping bed of the terminal crimping device installed on the side of the cutting blade group, and a continuous There is a continuous terminal crimping machine that crimps terminals on a continuous basis.

By the way, the above-mentioned upstream wire rod clamping device 1 has a first
The configuration is as shown in Figure 2. That is, the wire clamping device 1 includes a fixed horizontal shaft 2 extending in the wire feeding direction, and a disk-shaped rotating sliding body 3 fitted into the fixed horizontal shaft 2 so as to be slidable and rotatable along the fixed horizontal shaft 2. , an arm 4 whose base end is fixed to the outer periphery of the rotating sliding body 3 and extends perpendicularly to the wire feeding direction; and a hollow cylindrical wire rod attached to the tip of the arm 4 so as to extend in the wire feeding direction. The guide tube 5 is fixed to the arm 4 so as to grasp or release the covered wire w that can be inserted into the rod guide tube 5 by pushing the rod into the inside from the outer periphery of the wire rod guide tube 5 or retracting it outward. It consists of a wire gripping mechanism 6 and the like provided therein. Therefore, in the conventional continuous terminal crimping machine, with the cutting blade group 7 in the closed state, the rotary sliding body 3 is moved in the upstream direction to remove the coating of the remaining covered wire w, and then the rotary sliding body 3 is rotated. to make the arm 4 vertical (see the two-dot chain line in Figure 1 and Figure 2). At this time,
As shown in FIG. 2, the end coating Wa of the coated wire W protruding downstream from the wire guide tube 5 and the core wire portion Wb from which the coating is stripped are attached to the crimping bed 8 of the terminal crimping device 8, taking into account the drooping.
It is placed at an appropriate distance above the terminal T placed on top A so as not to collide with the terminal T. In this state, when the crimping die 8b, which has been waiting above, descends and crimps the terminal T to the end of the covered wire w, the tip of the covered wire w inevitably bends sharply, as shown in FIG. It will be bent.

If this coated wire w is fed downstream with the arm 4 returning to its original position with a large degree of bending, there is a risk that it will get caught in the cutting blade group 7 or the wire clamping device on the downstream side. Even if the wire is fed successfully, not only is the post-processing of the wire with terminals crimped complicated, but also the product value is reduced due to the poor appearance.

In view of the above-mentioned circumstances, the present invention has been developed such that the wire rod guide tube of the upstream wire rod clamping device is directed downstream from the intermediate portion so that the downstream opening becomes an elongated oval shape extending in the vertical direction when the wire rod guide tube of the upstream wire rod clamping device is moved to a position facing the terminal crimping device. Separately, between the upstream wire rod clamping device and the terminal crimping device, a space between the side part of the cutting blade group and the front surface of the terminal crimping device is formed along the wire movement locus. A wire guide made of an elastic material is provided to guide the moving wire, and when the end of the remaining coated wire is transferred to the terminal crimping device by rotation of the wire moving arm, the end does not touch the crimping bed or terminal. The wire guide guides the wire to a position slightly above the waiting terminal so that the wire guide does not get caught, and when the terminal is crimped with the crimping die, the end of the covered wire escapes downward along the inside of the long oval of the wire guide tube. The present invention provides a continuous terminal crimping machine that avoids sudden bending of the ends of the covered wire and always makes it possible to perform good terminal crimping.

The first embodiment of the present invention shown in FIGS. 4 to 8 will be described in detail below.

10 is a stock roll for the coated wire w; 11 is a guide roller; 12 is a group of wire drawing rollers having a large number of rollers arranged in a staggered manner; and 13 is a first feed roller consisting of a set of two rollers, which are variable speed and It is designed to run continuously.

Reference numeral 14 denotes a second feed roller which is made up of two sets and which can be opened and closed and is operated intermittently, and is linked to a length measuring mechanism (not shown) that can measure the length of the wire passing through the rotation of the roller. There is.

Therefore, the covered wire w always has a slight slack portion Y between the two fixed wire guides 15a and 15b arranged at an appropriate distance between the first feed roller 13 and the second feed roller 14.
It is arranged so that it has . Reference numeral 16 denotes a detector provided to detect when the coated wire w reaches a predetermined minimum amount of slack in the slack portion Y, and a loop portion at the tip of the detection lever 16a, which is swingable in the vertical direction using the base as a fulcrum. When the covered wire w is inserted through the wire w and the covered wire w hangs down due to the weight of the covered wire w and the detection lever 16a, and the detection lever 16a rises to a position corresponding to the minimum amount of slack, a limit switch linked to the detection lever 16a is activated. (not shown) operates to send a signal, and a timer (not shown) appropriately increases the speed of the first feeding roller 13 for a certain period of time.

The constant rotational speed of the first feeding roller 13 is adjusted to a rotational speed that is slightly smaller than the feeding amount of the coated wire within one driving time including the stop time of the second feeding roller 14. shall be kept. 17 is the second feeding roller 14
A group of cutting blades that can be opened and closed are arranged at an appropriate distance further downstream, including a set of two opposing core wire cutting blades 18a and 18b, and two core wire cutting blades 18a and 18b arranged parallel to each other on both sides above and downstream of the core wire cutting blades.
Set of coated cutting blades 19a, 19b, 19a'19b'
It consists of

Reference numeral 20 denotes a terminal crimping device disposed on the side of the cutting blade group 17 in a direction perpendicular to the wire feeding direction;
a, a crimping bed 20b on which the terminal T fed out one by one from the reel 20a is placed, and a crimping die 20c which is arranged appropriately above the crimping bed 20b and descends toward the crimping bed 20b at an appropriate time. .

Reference numeral 21 denotes an upstream wire clamping device disposed between the cutting blade group 17, the terminal crimping device 20, and the second feeding roller 14, and has the following configuration.

That is, the upstream wire clamping device 21 has a fixed horizontal shaft 22 fixed at both ends so as to extend in the wire feeding direction within the machine immediately below the front surface of the crimp bed 20b, and a fixed horizontal shaft 22 that can rotate and slide freely on the fixed horizontal shaft 22. a donut disc-shaped rotating sliding body 23 that is fitted into the rotating sliding body 23; an arm 24 that has a base fixed to the circumferential surface of the rotating sliding body 23 and extends upwardly of the machine in a direction perpendicular to the wire feeding direction; a main wire guide tube 25 that is attached to the tip of the arm 24 and extends in the wire feeding direction;
An auxiliary wire guide tube 27 is arranged to be located on the upstream side beyond the second feeding roller 14 by means of a rod 26 fixed to the intermediate portion of the arm 24, and an auxiliary wire guide tube 27 is connected to the main wire guide tube 25 to connect the two A wire gripping mechanism 28 is fixedly attached to the main wire guide tube 25 and the arm 24 in order to fixedly hold the coated wire w inserted into the wire guide tubes 25 and 27, and the rotary sliding body 23 is rotated around the fixed horizontal shaft 22. rotation mechanism 29
, and a sliding mechanism 30 for sliding along the horizontal axis 22. The inner diameters of the upstream half of the main wire guide tube 25 and the auxiliary wire guide tube 27 are made slightly larger than the outer diameter of the covered wire W to allow free insertion of the covered wire W. It gradually widens only in the direction toward the base of the arm 24 as it goes downstream.

Therefore, when viewed from the downstream side, the main wire guide tube 25 has an elongated oval shape. Furthermore, the rotating sliding body 23, arm 24, etc. are aligned with the central axes of the main and auxiliary wire guide tubes 25, 27 as they rotate. The movement locus is dimensioned so as to reach a position slightly above the terminal T placed on the crimp bed 20b from the feeding axis L of the covered wire w by the second feeding roller 14.

The wire rod gripping mechanism 28 fixes the hollow cylinder 28a to a hole bored in the upstream side surface of the main wire guide tube 25, and holds the hollow cylinder 28a in place.
A headed pin 28b is inserted into the pin 28a, a compression spring 28c is wound around the pin to constantly urge the pin outward, and the rod end of an air cylinder 28d fixed to the arm 24 is inserted into the pin 28b. The pin 28b is moved forward and backward into the main wire guide tube 25 by the rod expansion and contraction operation of the air cylinder 28d, thereby gripping and releasing the covered wire W.

The rotating mechanism 29 is composed of a short arm 29a projecting from the circumferential surface of the rotating sliding body 23, and a pushing rod 29b pivotally connected to the tip of the short arm with a pole joint. By vertical movement of the pushing rod 29b by a cam drive mechanism (not shown) of this machine connected to the press, the position i is moved from the position i, where the center axis 1 coincides with the feeding axis L, to the position directly above the crimp bed 20b. The rotating sliding body 23, the arm 24, the main and auxiliary wire guide tubes 25, 27
It is designed to rotate as if they were integrally rotated.

Further, the sliding mechanism 30 includes a roller with both flanges fitted onto the fixed horizontal shaft 22 so that one side of the flanged portion is fixed against the side surface of the rotary sliding body 23 so as to be able to rotate integrally with the rotary sliding body 23. 30a, and a swinging lever 30b in which a small roller 30b pivotally supported at the tip is rotatably engaged between the flanges of the roller 30a, and the cam drive of the machine is connected to the base end of the lever 30b. The lever 30b by a mechanism (not shown)
Due to the swinging, the rotating sliding body 23 and the arm 24
etc. are moved integrally in the wire feeding direction.

A wire rod guide 31 is arranged between the cutting blade group 17 and the terminal crimping device 20, and the upstream wire rod clamping device 21, and is made of one spring steel wire (for example, a piano wire), and its lower end base is connected to the feed axis. The terminal crimping device 20 is fixed on the machine base from L with an appropriate bracket so that the position can be adjusted freely.
The upper part is formed in an arc shape toward the upper front surface of the crimp bed 20b, and the center axis is the tip of the coated wire w that is moved when the arm 24 stops rotating toward the crimp device 20. The tip is bent upward to prevent the covered wire W from coming out.

32 is a wire rod guide provided immediately downstream of the cutting blade group 17; 33 is a downstream wire clamp device (not shown in detail) provided downstream of the wire rod guide 32;
An arm base with a pair of wire gripping claws is attached so as to be able to slide in the wire feeding direction on a horizontal axis provided at an appropriate location on the machine, and the sliding of the arm strips the coating from the rear end of the cut coated wire w. It's as good as it gets.

Next, the effect will be explained.

The first feeding roller 14 is in the closed state, and the upstream wire rod clamping device 21 aligns the center axis L with the feeding axis L, and connects the main and auxiliary wire guide tubes 25 and 27 to the second feeding roller 14, respectively.
are located downstream and upstream of.

The wire rod gripping mechanism 28 holds the tip of the pin 28b against the main wire guide tube 2 when the air cylinder 28d is in the rod shortened state.
5 into the cylindrical body 28a, allowing the covered wire w to freely pass through. Further, the cutting blade group 17 is in an open state, the downstream wire rod clamping device 33 has its gripping claws open, and the terminal crimping device 20 has the crimping die 20c waiting upward, and one terminal T is already on the crimping bed 20b. It is assumed that the

When operation is started in these conditions, the covered wire w is fed out toward the slack portion Y due to continuous rotation of the first feed roller 13.

When the second feeding roller 14 rotates, the covered wire W accumulated in the slack portion Y is easily transferred to the auxiliary wire guide tube 27, the main wire guide tube 25, the cutting blade group 17, the wire guide tool 32, and the downstream wire rod clamp device. 33, and when it has been fed by a predetermined amount, the second feeding roller 14 is fed by the action of the length measuring mechanism.
pauses. Next, the wire gripping mechanism 28 pushes the pin 28b into the main wire guide tube 25 against the compression spring 28c by the rod extension action of the air cylinder 28d, and as shown in FIG. Grip the covered wire W by pressing it against the inner wall.

Further, the gripping claws of the downstream wire clamp device 33 are also closed to grip the downstream portion of the covered wire w. Subsequently, the cutting blade group 17 is closed, and the core wire cutting blades 18a and 18b cut the coated wire w to a predetermined size, and the coated cutting strip 1 cutting blade 19a, 19b, 19
Cuts are made in the coating Wa on both sides of the cut portion by points a' and 19b'.

At the same time as this cutting operation, the second feeding roller 14 opens. Next, in the upstream wire clamping device 21, the swinging lever 30b of the sliding mechanism 30 swings in the downstream direction, and the rotating sliding body 23, arm 24, main and auxiliary wire guide tubes 25, 27, etc. are integrally moved downstream. In order to move to the side, the cut coating Wa of the remaining coated wire w is peeled off.

At the same time, the downstream wire clamping device 33 peels off the cut sheathing Wa of the cut sheathed wire W by sliding the arm in the downstream direction, and opens the gripping claws to release the cut sheathed wire W. It is housed in a receiver (not shown). Subsequently, the cutting blade group 17 opens and the downstream wire rod clamping device 33 returns to its original position. Then, in the upstream wire clamping device 21, the pushing rod 29b of the rotating mechanism 29 is lowered, and the arm 24, main and auxiliary wire guide tubes 25, 27, etc. are rotated integrally toward the terminal crimping device 20. During this rotation, the coated portion W of the coated wire W protruding downstream from the main wire guide tube 25
a is prevented from hanging midway through the guide of the wire rod guide 31, and when the arm 24 is vertical and stops rotating, the tip coating stripped end is placed directly above the crimp bed 20a and the terminal T. (solid line in Figures 5 and 7). From this state, the terminal crimping device 20 lowers the crimping die 20c.

At this time, the crimping die 20c is used to cover the tip of the coated wire w.
At the same time, the sheathing stripped core wire portion Wb is pushed down and pushed into the terminal T, and the terminal is crimped. At the same time, the sheathing portion Wa supported from below by the wire guide 31 also resists the elastic force of the wire guide 31. Then, it descends along the inside of the long ellipse of the main wire guide tube 25 and curves smoothly and effortlessly (solid line in FIG. 8). When the crimping die 20c finishes the terminal crimping operation and rises, the terminal-attached tip of the covered wire w is pushed upward by the elastic force of the wire guide 31.
As shown by the two-dot chain line in FIG. 8, it is almost restored to its original straight state.

The wire rod clamping device 21 on the upstream side is connected to the pushing rod 2.
9b rises, the arm 24, main and auxiliary wire guide tubes 25, 27, etc. return to their original positions (i.e., the position where the central axis ! coincides with the feeding axis L), and the swing lever 30b
By swinging in the downstream direction, the main and auxiliary wire guide tubes 25, 27 also return to their original positions on the downstream side along the feeding axis L.

At this time, the crimp terminal T of the covered wire w is in the open state of the cutting blade group 17.
There will be some intrusion in between. Next, the second feeding roller 14 closes to sandwich the coated wire w between the main wire guide tube 25 and the auxiliary wire guide tube 27, and also opens the air cylinder 28d.
By the rod shortening operation, the wire gripping mechanism 28 releases the covered wire w in the main wire guide tube 25.

This completes one cycle of length-measuring feeding of the covered wire w, cutting to a predetermined size, stripping off the end coating, and applying terminal pressure to the stripped end, and the second feeding roller 14 The next cycle begins when the wire rotates again and feeds the covered wire w.

In the first embodiment described above, the main wire rod guide tube 25 of the upstream wire rod clamping device 21 has an elongated shape that gradually widens only in the direction toward the base of the arm 24 toward the downstream side. As an example, as shown in FIGS. 9 to 11, the main wire rod guide tube 125 of the upstream wire rod clamping device 121 may be formed into an elongated 5-shaped shape that gradually widens only in the direction opposite to the base of the arm 124 toward the downstream side. Can be implemented.

In this second embodiment, the main and auxiliary wire guide tubes 1
The locus of movement of the center axis ν of the wire rods 25 and 127 is made to pass through the feed axis L and the center of the terminal T placed on the crimp bed 120b of the terminal crimp device 120.
31 guides the coated wire W end at the terminal end of the front surface of the terminal crimping device 120 so as to lift it slightly above the central axis ν, and places the coated wire stripped end at a position slightly above the terminal T (ninth, Figure 10).

When the crimping die 120c is lowered from the closed state, the crimping die 120c pushes down the tip coating Wa of the coated wire w and the core wire portion Wb of the coating strip 1 into the terminal T.
Terminal crimping is performed, and at this time, the covering portion Wa supported from below by the wire guide 131 also
It descends along the elongated interior of the main wire guide tube 125 against the elastic force of , and extends almost straight along the central axis ν (FIG. 11).

Of course, when the crimping die 120c rises after completing the terminal crimping operation, the end portion of the covered wire w with the terminal crimped is moved to the wire guide 13.
1 returns to the smooth curved state shown in FIG. 9, but when the arm 124 rotates and returns to the position indicated by the two-dot chain line in FIG. They are separated and become straight.

The first and second embodiments described above are both intended for so-called [single terminal crimping], but as shown by the two-dot chain line in FIG. One terminal crimping device 220 is added, and a downstream wire clamping device having almost the same configuration as the upstream wire clamping device 21 or 121 in the aforementioned embodiment is arranged in place of the downstream wire clamping device 33, and synchronized operation is performed as appropriate. By doing so, it can be used as a continuous double terminal crimping machine.

As described in detail above, when using the terminal crimping machine of the present invention, the movement of the covered wire for crimping the terminal to the front end of the cut covered wire is carried out by the main wire guide tube having an elongated hole and the wire guide made of an elastic material. Therefore, there is no inconvenience caused by the hanging wire being caught during movement, and there is no misalignment between the wire end and the terminal, and it is also possible to prevent the wire from remaining bent due to the wire dropping during crimping. This terminal crimping has many effects, such as facilitating transfer to the next process and post-processing such as bundling.

[Brief explanation of the drawing]

Figures 1 and 2 are detailed views of the upstream wire clamping device and terminal crimping device in a conventional continuous terminal crimping machine, Figure 3 is an explanatory diagram of the terminal crimping state, and Figures 4 to 8 and 9 to 11, respectively. FIG. 4 is an overall perspective view, FIGS. 5 and 9 are explanatory views of main parts before terminal crimping, and FIG. 7 is an enlarged detailed sectional view of part B in the figure, FIG. 7 is a view taken along the line A-A in FIG. It is. In the figure, 17 is a cutting blade group, 20 is a terminal crimping device, 21 is an upstream wire clamp device, 25 is a main wire guide tube, 31 is a wire guide, w is a covered wire, and T is a terminal.

Claims (1)

[Scope of Claims] 1. The coated wire from the stock roll is intermittently fed to the cutting blade group by a wire feeding means as appropriate, and the opening/closing movement of the cutting blade group cuts the coated wire and cuts the coated wire on both sides of the cutting portion. The cut coating is peeled off by the tensile action of the remaining coated wire and the cut coated wire on the anti-cutting blade group by upstream and downstream wire clamping devices disposed on both sides of the cutting blade group, respectively. The upstream wire clamping device swings in a direction substantially perpendicular to the wire feeding direction, and presents the stripped end of the remaining coated wire to a terminal crimping device disposed on the side of the cutting blade group. In a device in which a terminal is crimped to the end of which the sheathing has been stripped, the upstream wire clamping device is entirely movable in the wire feeding direction and rotatable within a vertical plane perpendicular to the wire feeding direction. a main wire guide tube fixed at the tip of the arm and extending in the wire feeding direction; and a wire gripping mechanism for grasping a covered wire that can be inserted into the main wire guide tube. When the wire guide tube is moved to a position facing the terminal crimping device, the downstream opening is formed into an elongated oval shape extending in the vertical direction. Separately, a wire guide made of an elastic material is provided between the upstream wire clamping device and the terminal crimping device to guide the moving wire from the side of the cutting blade group to the front of the terminal crimping device along the wire movement locus. A continuous terminal crimping machine characterized by: 2. The wire feeding means includes a set of two first feeding rollers that can be driven continuously and whose speed can be changed, and a length measuring mechanism that can be driven intermittently and opened/closed appropriately downstream of the first feeding rollers. detecting the minimum amount of wire rod slack formed through a second feeding roller consisting of a set of two fixed wire rod guides arranged between the first and second feeding rollers; 2. A continuous terminal crimping machine according to claim 1, further comprising a detector that generates a signal to increase the speed of said first feeding roller for a certain period of time. 3. The wire gripping mechanism includes a hollow cylindrical body fixed to a hole bored in the upstream side surface of the main wire rod guide tube, a headed pin loosely inserted into the hollow cylindrical body, and an outer end of the hollow cylindrical body and the A compression spring is wound around the head of a headed pin, and an air cylinder is fixed to the arm with a rod end abutting against the head of the pin. The continuous terminal crimping machine according to item 1. 4. The wire rod guide is made of a single spring steel wire, the lower end base is fixed on the machine stand 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 of the terminal crimping bed. 2. The continuous terminal crimping machine according to claim 1, wherein the tip of the covered wire W that has been moved can be held on the wire movement trajectory when the arm stops rotating toward the crimping device.