JPS5929356Y2 - Wire connection machine for contacts with crimp terminals - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a wire connecting machine for contacts with crimp terminals, and particularly to a deformed contact modification structure.

Multi-pole connector with contacts equipped with crimp terminals,
That is, as shown in the perspective views shown in FIGS. 1a and 1b.

In a multi-pole connector configured by using a crimp claw C1 for crimping and fixing the covering part b'l of the electric wire a, and crimp claws C2 and 4 for crimping and fixing the core wire part d, a contact f with a crimp terminal part e is used. teeth.

Contact f k With the contact fixed in the contact fixing hole of the insulating block, press the crimp claw C1v as shown in Figure 1.
(It is difficult to connect the electric wire AI by crimping it to '2',
Therefore, a method is used in which a metal wire is connected to the contact in advance, and this wire is inserted into the metal contact fixing body to form a connector metal.

Therefore, in order to efficiently connect electric wires to a large number of contacts, conventionally, as shown in the perspective view and front view shown on the second side a and b, contacts f are connected horizontally in a comb-like manner by connecting pieces g. he, feed the crimp terminal part e so that it is positioned on the contact holder i, and then use the crimp member j of the crimp claw that descends thereon to remove the insulation placed on the terminal part, e.g. wire connection. Wires that have been stripped of their sheathing by a sheathing stripping device separate from the machine, or automatically stripped of their sheathing by a sheathing stripping device attached to the wire connecting machine, are placed on the contact holder i before the crimp claw is crimped. Wires that are connected by crimping the a'Thb terminals of the wires are widely used.

By the way, in this case, in order to smoothly feed the contact chain hk onto the contact pedestal i, the contact guide plate, that is, one end of the contact plate, is provided with a guide groove that is biased toward the feeding groove of the connecting plate g and has a width larger than the horizontal width of the contact chain. The guide plate of the contact chain is made of gold so that its bottom surface is flush with the upper end surface of the contact holder i, and the contacts are fed onto the gold contact holder.

However, the inverted V-shaped notches j' and j of the crimp claw crimping body j
and by contact cradle i.

When the electric wire and the contact terminal portion are crimped by pressing the crimp claws e1gc2 with metal, the tips of both ends of the crimp claw crimped body j are lowered below the upper end surface of the contact holder i, as shown by dotted lines in FIG.

Therefore, it is necessary to provide a space IHr between the guide plate of the contact series and the contact holder i in order to escape the metal.

On the other hand, the contact chain has irregular bends due to irregular distortion caused when the punched material is rolled out or irregular distortion given during punching.
It often bends in the vertical direction.

This bending of the contacts is often caused by external forces applied during the punching process performed after punching, or even during transportation.

Therefore, when the contact is fed, the contact bent downward falls into the space l between the guide plate of the contact series and the contact cradle 1, and as shown by the dotted line in Figure 2, the contact cradle i. The protrusion on the side prevents the remittance.

Therefore, the gold contact cannot be fed onto the pedestal i, and the connection cannot be loaded.

Therefore, in the case of a wire connecting machine, for example, a wire connecting machine that inserts a wire with a stripped wire metal fitting and then manually operates a crimp claw to connect the wire, the bending of the contact is corrected each time by hand. However, since the work is interrupted during that time, it is inefficient, and if there are many single-bent contacts, the work is practically impossible.

In a connecting machine that automatically carries out the following steps in a sequential order: feeding the contact, fixing the wire, stripping the sheathing, and crimping using the crimp claw crimper, only the wire from which the sheathing has been stripped will receive the contact. Since crimping is performed on a table, there is a high risk that only the wires will be crushed and the wires will become unusable, or that the crimp claw crimping body or contact holder may be damaged as a result of almost blank crimping. big.

Therefore, bending of contacts is a fatal problem for electric wire connecting machines, and there has been a demand for an immediate solution to this problem.

This problem can be solved, for example, by adding some gold to the guide plate of the contact chain and extending the lower surface of the contact part e' of the contact placed on the contact pedestal i, but in practice, wire splicing machines, especially contacts sending, stripping wires,
A device that automatically performs a series of operations such as crimp claw crimping is equipped with a wire fixing mechanism, sheath stripping mechanism, and various other operating mechanisms. It is difficult to extend the lower surface 1, and even if possible, the extended portion fills the void below the contact area of the contact.

Therefore, there is no place for the coating to be stripped by the coating stripping device, and the stripped coating rests on the extension of the guide plate.

For this reason, as the number of times the contact is stripped increases, it will accumulate near the contact area of the contact that is being fed and scraped, and the stripped coating may be placed on the terminal of the contact that has been rubbed, making it impossible to connect wires. , poor connection can easily cause noise.

Conventionally, as a solution to this problem, a method using body sound for wire positioning has been provided, that is, to regulate the position of the tip of the wire to determine the position of the wire with respect to the terminal portion, or to determine the length of stripping the wire sheathing.

For example, the line positioning body mk shown in FIG. 2 is used.

As shown in the perspective view in Fig. 3, this method involves extending the wire positioning body m so as to be in contact with the wind end metal guide plate, and at the same time cutting out the base metal of the line positioning body m and inserting the contact into the wire. A guide lateral groove m''z is provided in which the tip of the contact part e' enters, and the extension part m' in contact with the second guide plate and the guide lateral groove m〃,
The contact metal is fed in while correcting the downwardly bent contact metal.

According to this method, a gap l' is formed between the contact pedestal i and the line positioning body m, so that the stripped coating 4 can be dropped into this gap, and as described above, the stripped coating is placed on the contact part. You can prevent it from accumulating in or around the area.

However, as shown in FIGS. 2a and 2b, the wire connecting machine cuts the connecting piece g of the contact chain, the connecting piece g' of the contact f, and the cutting piece n of the connecting piece g' of the contact f, almost at the same time as the electric wire is connected.
That is, the guide groove n' of the connecting piece is pressed down by the cutting press 0 that descends together with the pressing protrusion n/' of the gold clip claw crimping body j, and the upper corner p of the guide groove n'. After the connecting piece g' is cut by the corner q of the contact holder i, a cut connecting piece n is automatically returned upward by a spring body (not shown).

Therefore, as in the method described above with reference to FIG.
With the electric wire connected to the contact (f) whose tip end enters the guide lateral groove m and is covered by almost the entire length gold wire positioning body m above the contact part e', the connection piece g' of the contact chain is connected. When the electric wire a is cut, the electric wire a is thrown upward as shown in the sectional view of FIG. 4 by the connecting piece cutting body which returns upward after cutting the connecting piece g'.

For this reason, the stronger the wire a, the greater the bending force will be applied to the contact f.
It will bend near the connection point.

This results in a defective product that cannot be inserted into the contact fixing hole of the insulating block, resulting in a noise.

Due to the elasticity of the twisted and bent contact and the elasticity of the electric wire, the contact is strongly fixed at points A and C in Figure 4, thereby closing the guide lateral groove m//-q.

This □For example, the contact cannot be fed onto the next gold contact holder i unless it is removed by hand.

There are disadvantages such as a decrease in work efficiency.

The purpose of this proposal is to provide a wire connecting machine that eliminates the drawbacks of the conventional device as described above, and will be explained in detail below with reference to the drawings and sound.

The fifth side is a perspective view of the main parts of an embodiment of the present invention (portions with the same reference numerals as in Figs. 2 and 3 represent equivalent parts).

'), and its feature is that, as mentioned above, one end of the positioning body m is not provided with a guide lateral groove m'k by extension of the metal end m', but instead a guide groove in the guide plate of the contact series is provided. and the bottom surface of the tip of the contact part e' of the contact f,
A guide plate (for example, a plate) for guiding the downwardly bent contact (f) to the same height as the upper end surface of the contact pedestal (i) is fixed to the guide plate (k) of the purple contact.

Note that r' is a delivery guide slope.

In this way, as described above with reference to Fig. 4, after the joint piece is cut, the rising joint piece cut body n pushes up the wire metal, thereby exerting a force to bend the contact (fk). At this time, if the strength of the spring is set appropriately, the leaf spring r will be pushed by the tip of the contact portion e' and will bend downward as shown in FIG.

That is, in this case, as explained with reference to FIGS. 3 and 4, the lower end of the contact portion e' is not firmly held in a fixed position by the guide lateral groove m as in the conventional method, so that the contact is not bent. There is no risk of defective products making noise.

Even if the scraped contact f is bent, the plate spring r will block it.
Since the contact does not fall into the space L, it does not interfere with the contact feed.

In addition, since the force of the plate spring r is weak, even if the contact is pushed up by its return force and both ends of the contact portion e' are pinched by the plate spring r and the lower surface of the line positioning body m, the clamping force is small. .

Therefore, since the contact is not easily pushed out and stagnates by the next contact that is sent in, the workability 4 does not decrease.

! In the present invention, it is only necessary to fix the leaf spring to the guide plate of the contact chain, so it is extremely easy to implement and inexpensive.

In the above embodiments, a plate spring was used as the guide spring r, but a blade spring may also be used.

In addition, in the above example, the induction spring r is installed in the guide groove over the entire length of the guide plate of the gold contact series so that it is at the same height as the bottom surface of the induction spring. good.

However, in this case, it is necessary to ensure that no gap noise or height difference 4 occurs at the mounting part during installation.

As is clear from the above explanation, according to the first proposal, even if the contacts in the contact series are bent.

The contact can be reliably fed onto the gold contact holder, and the contact does not bend when connecting the wire to the terminal.
This has the advantage that there is no risk of electrical connection occurring, and it improves the efficiency of connection operations using a wire connection machine.

It has a great sound effect in preventing defective products.

[Brief explanation of drawings]

Figures 1a and b are perspective views of contacts with crimp terminals, Figures 2a and b are perspective views and cross-sectional views of the schematic structure of the wire connecting machine, and Figures 3 and 4 are contact receivers with bent honeycombs. A perspective view of a conventional method for preventing failures in feeding the metal to the base, a cross-sectional view for explaining defects such as bending of contacts caused by this method, and FIGS. 5 and 6 are perspective views of an embodiment of the present proposal. It is a sectional view for explaining the work. a... Electric wire, b... Covered part, (!1
5 (!2...Crimp claw %d...Core wire part, e...Terminal part. e'...Contact part, f...... contact,
g...Connection piece hg'...Connection piece, h.
...Contact series, i...Contact cradle, j...Crimp claw crimping body, k......
Contact continuous guide plate, k'...Contact continuous feed groove, k〃...Guide groove, l, l'......
Space, m...Line positioning body 2m'...
Extension part 1m...Guiding lateral groove, n...Connecting piece cut body, n'...Connecting piece guide groove, 0...
... Cutting press body 2r ... Guide spring.

Claims (1)

[Scope of utility model registration request] Crimp terminal (metal biased contact) K) Feed the contact assembly formed in a cylindrical shape so that the crimp terminal is positioned on the contact holder through the guide plate, and then crimp it with the crimp claw crimping body and the contact holder. The wire placed on the terminal part is crimped, and the connecting piece and contact are connected by a self-returning contact cutting body provided on the wire insertion side of the contact holder and a cutting pressing body that descends together with the crimp claw crimping body. In a wire splicing machine for cutting and connecting pieces, a spring body is provided between the guide plate of the contact series and the lower surface of the tip of the contact portion of the contact located on the contact cradle to guide the contact onto the gold contact cradle, A wire connecting machine for contacts with crimp terminals, which is designed to prevent contact feeding failure due to downward bending of the contacts.