KR20030044725A - Cutting device for ent wire for retractable antenna - Google Patents

Abstract

PURPOSE: A cutting apparatus of an NT wire for a retractable antenna is provided to prevent the generation of a burr by pulling a continuously supplied wire in a heated state to cut it. CONSTITUTION: A fixing block(12) is fixed and installed on a base(11). An operating block(14) is installed on near the fixing block(12) and guided to a guide rail according to a driving of an operating cylinder(16) to perform advance and retreat. Elevating rods(18,19) are installed on the fixing block(12) and the operating block(14) so as to be capable of elevating. Fingers(30,31) are installed on upper portions of the fixing block(12) and the operating block(14) around a shaft. Power supplying lines(36,37) are connected to the fixing block(12) and the operating block(14) to apply a low voltage and a high current.

Description

Cutting device for ent wire for retractable antenna {omitted}

The present invention relates to an antenna for a retractable antenna that plays a role of transmitting and receiving a wireless terminal. More specifically, the present invention relates to an antenna for forming a retractable antenna. The present invention relates to an apparatus for cutting an ent wire for a retractable antenna that automatically cuts to a predetermined length.

1 is a vertical cross-sectional view of a conventional retractable antenna, and FIG. 2 is a perspective view showing a conventional retractable wire. The retractable antenna 1, which serves to transmit and receive a signal in a wireless terminal, is formed of an metallic material. It consists of a wire 2, a tube 3 surrounding the ante wire, and an injection-molded material 4 injected with the ent wire 2 wrapped with the tube inserted.

The ante wire 2 cuts the wire wound on the bobbin to a predetermined length, and then forms an extension 5 to increase the tensile strength at the portion connected to the injection molding 4.

In other words, while the retractable antenna 1 is repeatedly attached to the wireless terminal (not shown), the retractable antenna 1 is repeatedly drawn out, even if a certain amount of tensile strength is applied to the connection portions thereof. Punching is performed at the end of the ante wire 2 so as not to be separated, thereby forming an extension part 5 serving as a locking step.

An ante wire (hereinafter referred to as "wire") 2, which serves as described above, cuts to a predetermined length by a punch or a cutter, and then forms an extension 5 at the end while transferring between processes.

However, since the device cuts the high hardness wire by using a punch or a cutter, burrs are generated on the cut surface and must be polished by a separate grinder before the wire is tubed. When inserting the mold into the mold, the mold may be inserted into the mold, thereby causing a problem in that productivity is further reduced.

In addition, since the life of the punch or cutter is significantly reduced due to the high hardness of the ante wire, there was also a problem that the maintenance cost of the parts according to the wire cutting is very large.

The present invention has been made to solve such a conventional problem, by pulling and cutting the wire continuously supplied in the heat generated state by the application of power without using a punch or a cutter so that no burr on the cutting surface There is a purpose.

Another object of the present invention is to make the cutting surface automatically tapered when the wire is cut, so that the wire can be quickly inserted into the tube in a later process.

According to an aspect of the present invention for achieving the above object, a base serving as a main body, a fixed block fixedly installed on the base, and installed close to the fixed block is guided to the guide rail in accordance with the driving of the movable cylinder to advance A movable block for movement, an elevating rod mounted on the fixed block and the movable block so as to elevate, a driving means for elevating each elevating rod at the same time, and an upper portion of each of the fixed block and the movable block so as to be rotatable about an axis. There is provided a cutting device for an antenna wire for a retractable antenna, comprising a finger coupled to a pin by a lifting rod, and a power supply line connected to the fixed block and the movable block to apply a low voltage and a high current.

1 is a longitudinal cross-sectional view of a conventional retractable antenna

2 is a perspective view of an ante wire processing machine equipped with the apparatus of the present invention;

Figure 3 is a perspective view showing the main part of the present invention

4A and 4B are cross-sectional views taken along the line A-A of FIG.

Figure 4a is a state in which the finger is rotated from the fixed block

Figure 4b is a state in which the finger clamps the wire by driving the cylinder

5A and 5B are cross-sectional views taken along the line BB of FIG. 4B;

Figure 5a is a state in which the movable block is close to the fixed block

Figure 5b is a state in which the movable block is transferred in the state that the wire located between the fixed block and the movable block is heated

Figure 6 is a front view showing a cut portion of the wire cut by the present invention

Explanation of symbols for main parts in the drawings

11: base 12: fixed block

14: movable block 16: movable cylinder

18, 19: lifting rod 20, 21: fixed piece

26, 27: sliders 30, 31: fingers

35: wire through groove

Hereinafter, with reference to Figures 3 to 6 showing an embodiment of the present invention in more detail as follows.

3 is a perspective view showing the main portion of the present invention, Figures 4a and 4b is a cross-sectional view taken along the line A-A of Figure 3 and Figures 5a and 5b is a cross-sectional view taken along the line B-B of Fig. 4b, the present invention is a base that serves as a main body The fixed block 12 is fixed to the bolt 11 by the bolt 13 and the movable block 14 is installed to move forward and backward along the guide rail 15 at a position close to the fixed block. On one side of the movable block 14, a rod of the movable cylinder 16 provided on the bottom of the base 11 is fixed.

The through hole 17 is formed on the base 11 in the moving section of the movable block 14 so that the movable block 14 moves forward and backward within the range of the through hole 17 as the movable cylinder 16 is driven. Done.

One side of the fixed block 12 and the movable block 14 is provided with elevating rods 18 and 19 so as to be able to elevate, respectively, so that the elevating rod can move up and down within a range set by the driving means.

The driving means is fixed to the fixed block 12 and the movable block 14, the fixed piece 20, 21, respectively, and fixed to each of the fixed piece is installed so as to move forward and backward in the long hole (22) (23) The lower portions of the elevating rods 18 and 19 are installed on the sliders 26 and 27 fitted with the dowel pins 24 and 25, and the rods are connected to the sliders so that each slider is within the range of the long hole. It consists of the cylinders 28 and 29 which move forward and backward.

In one embodiment of the present invention, the horizontal motion of the cylinders 28, 29 is configured to be switched to the vertical motion by the dowel pins 24, 25 and the long holes 22, 23, the lifting bar 18 (19) can also be comprised so that a cylinder can be directly elevated.

Fingers 30 and 31 are installed on the upper surface of the fixed block 12 and the movable block 14 so as to rotate about the shaft 32, and a long hole 33 is formed at a portion opposite to the shaft. The upper portion of the elevating rods (18) and (19) fitted in the long hole is to be coupled to the pin (34), respectively, of the fingers (30) (31) installed on the fixed block (12) and the movable block (14), respectively. The wire passage groove 35 is formed in the connection surface.

On the other hand, the fixing piece 20, 21 is connected to the fixed block 12, the movable block 14 and the power supply line 36, 37 for applying a low voltage and a high current to the fingers 30, 31, respectively, The materials of the fixing pieces 20, 21, the fixing block 12, the movable block 14, and the fingers 30 and 31 are made of copper (Cu) or copper alloy with low resistance when the power is applied. .

Referring to the operation of the present invention configured as described above is as follows.

First, the elevating rods 18 and 19 are positioned at the top dead center as the sliders 26 and 27 move forward in accordance with the driving of the cylinders 28 and 29 to pin the upper portion of the elevating rods 18 and 19. After the wires 2 are conveyed by a predetermined length by the transfer unit 38 in the state as shown in FIG. 4A in which the fingers 30 and 31 coupled with the 34 are pivoted upwardly about the axis 32, The cylinders 28 and 29 are driven again to pull the sliders 26 and 27 which have advanced.

Accordingly, the elevating rods 18 and 19 and the dowel pins 24 and 25 fixed to the inclined long holes 22 and 23 of the sliders 26 and 27 are inserted into the sliders 26 and 27. Since the horizontal motion of the elevating rods 18 and 19 is transferred to the vertical movement, the elevating rods 18 and 19 are lowered, and the fingers 30 and 31 are moved around the axis 32 as shown in FIG. 4B. As it rotates, each of the fingers 30 and 31 clamps the transferred wire 2.

At this time, the wire 2 is stably clamped by the wire passing groove 35 formed in the connection surface of the fixed block 12, the movable block 14, and the fingers 30 and 31.

Then, power is applied through the power supply lines 36 and 37 connected to the fixed pieces 20 and 21 so that a weak voltage is applied to the fixed block 12, the movable block 14, and the fingers 30 and 31. When the current is applied and a strong current flows, the resistance value is instantaneously increased in the wire 2 positioned between the fixed block 12 and the movable block 14, so that the wire generates heat at a high temperature.

As such, when the movable block 14 and the movable cylinder 16 to which the rod is fixed are driven at a time when the wire 2 positioned between the fixed block 12 and the movable block 14 is heated at a high temperature, the movable block ( 14) in the range of the through hole 17 along the guide rail 15 to move as shown in Figure 5b away from the fixed block 12, so that the heat generating portion is increased.

Accordingly, since the cross-sectional area of the heat generating portion is reduced, the portion clamped to the fixed block 12 is cut. At this time, the cut portion fixed to the movable block 14 has a taper whose outer diameter gradually decreases as shown in FIG. 6. Since it has the shape (2a) it is possible to easily insert the wire into the tube in the post-process without going through the grinding process by a separate grinder.

As described above, the movable cylinder 16 cuts the wire 2 while moving along the through hole 17 while the finger 31 of the movable block 12 clamps the wire 2 while driving the movable cylinder 16. At the same time, the cylinders 28 and 29 are driven again to raise the lifting rods 18 and 19, so that the transfer unit 39 moves the wire 2 cut to a predetermined length to the next process. Will be transferred.

At the same time, the transfer unit 38 for transferring the wire wound on the bobbin to the cutting device side is driven at the same time, so that the wire 2 of a predetermined length is positioned between the fixed block 12 and the movable block 14 as in the initial state. do.

After the wire 2 wound on the bobbin is transferred, the movable block 14 is returned to the point close to the fixed block 12 as shown in FIG. You can do it.

As described above, the present invention does not cut a wire by a punch or a cutter and generates heat by application of power, and then automatically cuts it while pulling it, so that no burr is generated at the cut portion. Since the wire can be easily inserted into the tube without going through the polishing process, the productivity is improved.

In addition, since the cutting surface is tensioned to form a tapered shape, the insertion of the tube becomes easier.

In addition, since the wire is cut while pulling due to the heat generated by the application of power, the cutting device can be used semi-permanently.

Claims (3)

A base acting as a main body, a fixed block fixedly installed on the base, a movable block which is installed in close proximity to the fixed block and guided and moved forward and backward by the guide rail according to the driving of the movable cylinder, and the fixed block and the movable block. An elevating rod installed to be capable of elevating, a driving means for elevating each elevating rod at the same time, a finger that is rotatably installed about an axis on an upper portion of each of the fixed block and the movable block, and one end of which is pinned to the elevating rod; An apparatus for cutting an ent wire for a retractable antenna, comprising a power supply line connected to a block and a movable block to apply a low voltage and a high current. The method of claim 1, The driving means is fixed to the fixed block and the lower portion of the movable block, respectively, fixed to the fixed piece, the fixed piece is installed so as to move forward and backward in the long hole, the lower end of the lifting rod is fitted with a dowel pin, and the rod is connected to the slider An apparatus for cutting an entwined antenna for retractable antennas, comprising: a cylinder provided on a fixed piece and configured to move each slider back and forth within a range of long holes. The method of claim 1, And a wire passing groove is formed in a connection surface of a finger installed on the fixed block and the movable block, respectively.