ELECTRICAL TERMINAL PLIERS WITH CURSOR AND CONTINUOUS LOADER

Description

PD97A000118 Eng. MAURIZIO BENETTIN Register of Industrial Proprietor Consultants n. 477 ELEMATICS.rL - CAMIN(PD) TITLE ELECTRICAL TERMINAL PLIERS WITH CURSOR AND CONTINUOUS CHARGER DESCRIPTION This patent relates to the electrical wiring sector and in particular concerns terminals and tools for fixing the terminals to the ends of electrical wires. A terminal can be applied to the end of an electric wire using a suitable system and a specific tool. Its characteristics will depend on the use for which it is intended. There are various types of terminals for electrical wires, the most commonly used being those consisting of a metal tube with a wider edge of insulating plastic. The terminal is inserted onto the end of the electrical wire and press-fitted to the wire using special pliers. This operation is also called crimping, from the English term to crimp which means to bend, strangle, crimp. Currently, crimping pliers consist of simple pliers whose gripping ends are adapted to hold and tighten a tube terminal. To crimp a terminal onto the end of a wire, hold the pliers with one hand, take a new terminal from the appropriate container, insert it into the pliers' seat and tighten slightly. the pliers so that the terminal does not slip out, insert the stripped end of the wire into the terminal and squeeze the pliers so that the terminal is deformed, holding and connecting to the tube terminal. The crimping pliers we know, due to their design and construction, present a series of drawbacks. Find the right terminal for the wire you're crimping in the terminal container. Apply proper pressure to the terminal with the pliers to hold it in place, without crushing or deforming it before inserting the wire, otherwise it will become unusable. If you forget to strip the wire, put down the crimping tool, strip the wire, and repeat the process of inserting the terminal onto the tip of the pliers. This involves too many manual operations that require a lot of time and proper dexterity. It should be noted that there are known terminal strips consisting of several terminals placed side by side and joined by means of small portions of plastic material constituting the insulated edge of the terminals. The subject of this patent is a new crimping tool for tube terminals that avoids all the above-mentioned drawbacks and is very convenient and practical to use. The new crimping tool is made up of two handle levers, two blades, a terminal magazine holder and a terminal feeder. The two handle levers are two generally linear elements hinged at one end and designed to be gripped in a similar way to a nutcracker. The ends of the two handles, which are hinged together, are shaped to allow a limited opening of the two handles, making it easier to grip the new pliers. A special elastic element keeps the two handles open, thus avoiding the need to open them manually, keeping the new pliers always ready for use. One of the two handles has a U-shaped section with the concave side facing the opposite handle. The terminal magazine is housed in the groove formed by the U-section. The other handle of the new pliers features, near the hinged end, the two blades for crimping and detaching the terminals. The two blades are parallel, not aligned with each other, and are perpendicular to the plane of rotation of the two handles. Each of the two blades performs a specific and different function. One of the two blades, the one closest to the hinge point of the handles, has a non-sharp but flat or knurled or serrated edge and performs the function of deforming the terminal to be crimped. The second blade, the one furthest from the hinge point of the handles, has a sharp edge and serves the function of separating the crimped terminal from the other terminals contained in the magazine. The terminal tube magazine consists of a container in which a strip of terminal tubes is housed. One of the walls of the charger is open and is shaped to accommodate and retain exactly one terminal, even if connected to the other terminals on the strip. This open wall of the magazine is open both at the top and on the sides corresponding to the ends of the tube terminal. This open wall actually forms the crimping seat for the terminal. For this purpose, the U-shaped handle features a recess for the open wall—the crimping seat for the magazine—in correspondence with the blades of the other handle. The internal walls of the magazine are properly shaped to accommodate the terminals exactly and to guide each terminal and / or the entire strip of terminals towards the open side - crimp seat - of the magazine. The lower end wall of the magazine features a linear opening parallel to the direction of advance of the terminal strip. The U-shaped handle features a slider with a tooth that can be easily operated with a finger. The slider tooth It passes through the handle and the lower wall of the magazine until it engages between two consecutive terminals. Actuating the slider advances the terminal strip towards a crimping location. It is possible to provide that, in place of the magazine as described above, a support for a spool of terminals is applied to the free end of the U-section handle in order to have greater autonomy. Using the new crimping tool is quick and easy: - a magazine with suitable terminals is inserted into the handle so that the crimping seat of the magazine is located under the crimping blades; - the cursor is operated to bring a tube terminal into the crimping seat; - the stripped wire is inserted into the tube terminal located in the crimping seat; - the handles of the new pliers are brought together and squeezed until the crimping blade has correctly deformed the terminal, securing it to the wire, and until the cutting blade has separated the newly crimped terminal from the strip of terminals contained in the magazine; - the handles are released and the crimped wire is extracted to the terminal leaving the new crimping tool ready for subsequent use. The attached table shows, by way of example and not as a limitation, a practical embodiment of the invention. In figure 1 you can see the separate parts that make up the new crimping tool while in figure 2 you can see the new assembled caliper. The two handles (1 and 2) are joined at their ends by two perms (1.3,1.2) of which one (1.3) acts as a rotation die while the other (1.2), fixed to the upper handle (1) and sliding in a groove (2.1) of the lower handle (2), acts as an opening limiter between the two handles (1 and 2). The upper handle (1) is equipped with two blades (1.4 and 1.5) near the rotation point (1.3) of the two handles (1, 2). The blade (1.4) closest to the fulcrum point (1.3) is not sharp but has a flat or knurled or serrated lower edge so as to deform the tube terminal (5). The blade (1.5), furthest from the fulcrum point (1.3), has a sharp lower edge so as to separate the crimped terminal (5) from the others. The lower handle (2) has a U-shaped section to accommodate the magazine (6) containing the tube terminals (5). The part (6.1) of the magazine (6) which is closest to the fulcrum point (1.3) and in correspondence with the W3F blades (14, 1.5) of the upper handle (1) is open at the top and shaped to correctly retain the tube terminal (5). On the lower handle (2) there is a slider (7) equipped with an elastic tooth (7.1) which pushes the terminals (5) of the magazine (6) towards the crimping position (part 6.1 of the magazine). For this purpose the lower surface of the magazine (6) has an opening (6.2) which allows access and operation of the tooth (7.1) of the cursor (7). Two suitable springs (2.8, 2.7) keep the handles (1, 2) of the pliers open and push the cursor (7) back. Figure 3 shows an example of the construction of the 5 new clamp equipped with support (9) for the spool (10) of continuous strips of terminals. These are the schematic methods sufficient for the skilled person to realize the invention, consequently, in concrete application there may be variations without prejudice to the substance of the innovative concept. Therefore, with reference to the preceding description and the attached table, the following claims are expressed.

Claims

CLAIMS Crimping tool for continuous strip tube terminals composed of two handles hinged to each other at one end, characterised by the fact that one of the handles is equipped with two parallel blades, not aligned with each other, has a flat and / or knurled and / or serrated edge and is designed to deform the terminal, while the blade furthest from the point of rotation of the handles has a cutting edge designed to separate >1 crimped terminal from the other terminals of the strip still to be crimped. ~ crimping tool as per claims 1, 2, characterised by having, on the lower handle, a cursor with a tooth suitable for pushing each terminal to be crimped towards the point where the blades engage the terminal with the wire. - Crimping tool as per claims 1 and 2, characterised by having a magazine for tube terminals, open superiorly towards the blades and shaped so as to hold a terminal in the correct position and equipped with a lower opening for the insertion of the tooth of a lower translating cursor. » Crimping tool as per claims 1, 2, 3, characterised by the fact that the handle which houses the terminal magazine is equipped with a support to house a spool of terminals in continuous strip.

5. Crimping machine for continuous strip tube terminals as per the preceding claims, characterised by the fact that its production and marketing are intended to be protected by this patent, all as described and illustrated. Padua, June 4, 1997 5 ELE MATIC srl; for assignment. Ing MAURIZIO ΒΕΝΕΤΤΪΝ Albe Consultants Propr. Address no. 477