JPS63257410A - Cable takeup - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cable winding machine, and more particularly to a cable winding machine that makes it possible to reduce inductance formed due to winding of a cable.

[Conventional technology]

For example, in a welding machine, the distance between the welding machine and the torch is quite long because the welding process is carried out while sequentially moving the positions to be welded, and this cable becomes a nuisance during use and storage.

For this reason, a cable winder is used to pull out the required length and use it, or to wind up the entire length and store it. There are various types of cable winding machines on the market (for example, listed in Seki Sangyo Co., Ltd.'s comprehensive catalog of equipment and tools).
Generally, the structure is such that a rotating drum is mounted on a stand or a frame, and one end of the cable is hooked to the rotating drum and wound in the same direction.

This type of cable winding machine winds the cable around the drum several times to several tens of times, so the wound cable is in the same state as an air-core coil and has inductance. This inductance component is equal to 2 times the number of turns of the cable.
increases in proportion to the power of Regarding this inductance,
The details are explained below.

The inductance of the cable when it is wound around the take-up reel can be expressed by equation 11.

L-μA RN”/f, -----
−−・−−−−−−−(1) However, inductance of L2 cable (H) A: Shape factor of coil (m) μ: Magnetic permeability of air (H/m) R: Average of take-up reel Radius (m) N: Number of cable turns (-) I! 2. Cable winding width (m) Therefore, if the number of cable turns doubles, the cable inductance will quadruple. The number of turns in a cable is approximately proportional to the length of the cable, so if the cable length doubles, the inductance quadruples. Thus, as the cable becomes longer, the inductance in the wound state increases.

By the way, in recent welding machines, the frequency (current waveform) during welding ranges from DC to 5Hz and 500Hz.

It covers a wide range such as 20KHz. The resistance valve of the cable in the low frequency range is approximately determined by the length, diameter, and material of the cable, but as the frequency increases, it cannot be ignored and becomes as shown in equation (2).

Z=F lower τ ""Logo -------・-(21 However, 2: Cable resistance valve R: Cable DC resistance (Ω) f: Frequency (Hz) L2 Cable inductance (H) According to equation (1), when a cable wound around a winder is used in a high-frequency welding machine like this, the inductance increases and the resistance valve (Z) of the cable increases in proportion to the frequency. Taking the above-mentioned frequencies as an example, when using a low-pulse 5Hz welding machine and when using a bi-pulse 20KHz welding machine, the cable resistance valve Z regarding inductance
It can be seen that there is a difference of 4.000 times. In other words, the resistance valve Z of the cable is proportional to the inductance of the cable, so if the inductance of the cable doubles, the resistance valve of the cable also doubles.

For this reason, the output of the welding machine decreases due to the inductance generated on the cable, making it difficult to melt the welding material, and welding may not be possible.

Figures 21 (a) and (b) show the changes in welding current and voltage when welding cables of the same length are used in a straight line (characteristic A) and when they are used in a coiled form (characteristic port). It is something that

As shown in FIG. 22, when measuring characteristic (a), a cable 22 with a length of 44 m is wired in a straight line between the welding machine 20 and the torch 21, and the current and voltage at the torch section are Detected by a total of 23.24.

In addition, when measuring the characteristic (b), as shown in FIG. 23, the cable 22 is made into an air-core coil with a diameter of 600 mm and 20 turns, and the current and voltage at that time are detected. In either case, the frequency during welding is 100 Hz.

As is clear from FIGS. 21(a) and 21(b), when the cable is coiled, the welding current and voltage are both about 2, and the power ratio is 1/4 compared to when the cable is made straight.

As a result, when the cable is wound, the welding wire will not melt (and welding will become impossible.) When the cable is wound in this way, the influence of inductance is large, and the
The figure shows that even if no characteristic difference occurs, deterioration in welding performance cannot be avoided.

In order to reduce the effect of this inductance, conventionally, cables of different lengths are used depending on the distance between the welding machine and the welding position, but this method requires cables of multiple lengths. It is necessary to keep it on hand, and there is an inconvenience of having to replace it.

In the above explanation, a welding machine cable was used as an example, but the present invention applies to any device in which cable inductance deteriorates current or voltage waveforms.

[Problem that the invention seeks to solve]

In the conventional example as described above, no consideration was given to removing the inductance component that occurs when the cable is wound, and it was not possible to use the device with the cable wound.

An object of the present invention is to provide a cable winder that can reduce inductance caused by winding a cable.

[Means for solving problems]

In order to solve the above problems, the present invention provides a cable winding machine in which a take-up reel for winding a cable is rotatably attached to a frame or a stand, and the present invention provides a cable winding machine in which a take-up reel for winding a cable is rotatably mounted on a frame or a stand. A mounting member is provided on the take-up reel.

[Effect]

According to the above means, by setting the middle part of the cable as the winding start point for the take-up reel, the two branched cables are wound in mutually opposite directions, and the inductance component can be canceled out. Therefore, the take-up reel can be constructed without generating an inductance component due to cable winding.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

1 and 2 are a front view and a plan view showing an embodiment of the present invention.

A winding loop 1 in the form of a pincushion is rotatably supported by a frame 2 made up of pipes arranged in a stepladder shape.

The body of the take-up reel 1 is provided with a cable folding claw 3 that engages the folding point of the cable folded in two. Further, a take-up knob 4 is attached to the side surface of the take-up reel 1 so that the take-up reel 1 can be rotated.

Next, the winding method will be explained.

In the case of a cable for a welding machine, fold the cable 5 in half from the middle, hook the folding point on the folding claw 3 as shown in Fig. Rotate the winding wheel 1 in the opposite direction. The rotation of the take-up reel 1 is stopped while the cable 5 of a required length is pulled out from the take-up reel 1.

Since the two cables of the cable 5 are wound around the coil 1 in opposite directions from the middle, the inductance component is canceled and does not affect the current flowing through the cable 5 or the output voltage.

In addition, when winding, rotate the winding reel l while strongly pulling the two cables 5 in the opposite direction to the winding direction.
The two trees are under the same conditions (wrapping is in position.

The number of turns per winding diameter, etc.) is required. Therefore, when winding the cable 5, the winding reel 1 must be rotated.

When the cable 5 is manually wound onto the reel 1 with the take-up reel 1 fixed, the winding becomes unbalanced and the inductance component cannot be effectively canceled.

In order to prevent such manual winding of the cable, as shown in FIG. Set to a small value.This makes it impossible to insert the cable 5 into the winding wheel 1 from the outside.As a result, the cable 5 can be wound only by the rotation of the winding wheel 1.

As a method for finding the turning point of the cable 5, a mark may be provided in advance at the midpoint of the cable 5 with tape or the like. More actively, as shown in FIG. 5, a fastening member 6 is tied to the middle of the cable 5, and this is fastened to a hook 7 provided on the take-up reel 1 instead of the folding claw 3 as shown in FIG. Just do it.

FIG. 7 shows a second embodiment of the present invention, in which a folding plate 8 is provided in place of the folding claw 3.

The cable 5 is wound around the folding plate 8 as shown in FIG.

Further, FIG. 9 shows a third embodiment of the present invention, in which a folding claw 3'', which is a longer version of the folding claw 3 shown in FIG. 2, is provided in the middle of the body of the take-up reel 1. Alternatively, the cable 5 may be wound up as shown in Fig. 1O. That is, an attempt is made to reduce the inductance by winding only one side of the cable 5 onto the take-up reel 1 from a suitable portion and reversing the winding direction every time.

FIG. 11 shows a fourth embodiment of the present invention, in which a male connector 11 and a female connector 12 are provided in place of the folding claw 3. The male connector 11 and the female connector 12 are connected within the winding loop 1, and are connected by V112 as shown in FIG. 12.

As shown in FIG. 13, a welding machine 2 is attached to the male connector 11.
A cable 5A from the torch 21 is connected to the female connector 11, and a cable 5B from the torch 21 is connected to the female connector 11. With such a configuration, since there is no folded part of the cable, it is possible to prevent the cable from being disconnected or damaged.

In each of the above embodiments, as shown in FIG. 14, the cable winding machine 10 is disposed in the middle of the cable 5 where the cables 5A and 5B have the same length. This arrangement not only obstructs passage, but also tends to restrict the movement range of the torch 21.

Therefore, as shown in FIG. 15, it is desired that the cable winding machine 10 be disposed close to the welding machine 20 side. A cable winding machine having such a configuration will be described in detail below.

FIG. 16 is a side view showing a fifth embodiment of the present invention.

A fixed reel 33 provided with only one side plate is fixedly attached to a shaft 32 that projects horizontally from the frame 31, and a rotary reel 34 provided with the other side plate is disposed on the opposite side of the fixed reel 33. It is set up. Furthermore, fixed reel 33
A rotary reel 35 that rotates in conjunction with the rotary reel 34 is disposed between the rotary reel 34 and the rotary reel 34 . A cable folding claw 36 is provided on the outer peripheral surface of the rotating reel 35,
A take-up knob 37 is attached to the side plate surface of the rotating reel 34. Further, on the bottom plate of the frame 31, cable passing tools 38 and 39 are provided for passing the cable 5 that is engaged with the cable folding claw 36.

FIG. 17 shows the drive mechanism of the rotating reel, and the fixed reel 3
A gear 40 is fixedly mounted concentrically on the rotating reel 34, and an internal gear 41 is fixedly mounted concentrically on the rotary reel 34.

A gear 42 is disposed to mesh with each of the gear 40 and the internal gear 41, and its support shaft 43 is fixed to the rotating reel 35.

With respect to the diameter of the gear 40, the diameter of the gear 42 is set to D/2, and the inner diameter of the internal gear 41 is set to 2D.

Therefore, when the rotating reel 34 rotates once, the gear 42
The rotating reel 35 on which is attached rotates A.

In the configurations shown in FIGS. 16 and 17, the cable leaving a predetermined length from the welding machine is passed through the cable passing tool 38 as shown in FIG. The cable is drawn out of the winding machine through the cable threading tool 39, and its tip is connected to a torch. In the cable passage tool 38, the cable is fixed by a fixture (not shown) so that it does not move. Therefore, only the cable on the torch side is wound up by the reel.

When the reel 34 is rotated by gripping the take-up knob 37 in the state shown in FIG. 18, the cable on the torch side is taken up as the reel rotates, and the length between each cable passing tool and the cable folding claw 36 is always the same. Wind it up continuously while taking it. The welding machine side cable and the torch side cable, which are wound on a reel, are always the same length, so that inductance can be canceled.

During this winding, the rotating drum 34 is
Since the cable rotates at twice the speed of the cable 5, the cable on the one side is fed out to the cable folding claw 36 before being folded, the cable moves smoothly through the folding point, and the cable 5 is pulled to the cable folding claw 36. There will be no problems such as hanging.

With this configuration, as is clear from FIG. 18, since one end of the cord can be fixed, it is possible to provide an outlet in the frame 31. Furthermore, it becomes possible to incorporate the cable winding machine itself into equipment such as a welding machine.

FIG. 19 is a side view showing a sixth embodiment of the present invention. This embodiment is suitable for cases where the surface of the cable is not smooth.
A pulley 45 is attached to the frame 31 shown in FIG. 16 at the center of the body of a take-up reel 44 having the reel size shown in FIG. 16, and this pulley is used as a turning point.

As shown in FIG. 19, the cable 5 is passed through the cable passing tool 38, then through the pulley 45, and then passed through the cable passing tool 3.
It is drawn out through 9. How the cable is wound
This is similar to the fifth embodiment, and only the cable on the cable passing tool 39 side is wound up as the take-up reel 44 rotates.

In both the fifth and sixth embodiments, the cable 5 is wound in a single layer. In this case, the length of the cable to be wound becomes a problem, but if the reel diameter is 3Qcm and the reel winding width excluding the width of the pulley 45 is 30cm, one turn is 9Qcm.
A cable with a length of 27 m can be wound up 30 times aX, and there is no problem in practical use.

FIG. 20 shows a modification of the embodiment shown in FIG. 19, in which two pulleys 45a and 45b are provided and a cable is passed between the two pulleys. With such a configuration, the cable can be smoothly unwound.

Although each of the above embodiments has been described using a welding machine as an example, it goes without saying that the present invention can be applied to any device that is affected by an inductance component generated in a cable.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to reduce the inductance component generated by winding a cable, and therefore it becomes possible to use the present invention even for equipment to which a cable winder could not be connected conventionally. Therefore, there is no need to install a number of cables of different lengths (or replacement work) as in the conventional case.

[Brief explanation of drawings]

1 and 2 are a front view and a plan view showing the first embodiment of the present invention, FIG. 3 is an explanatory diagram of cable winding in the first embodiment, and FIG. 4 is a manual winding prevention in the first embodiment. 5 and 6 are plan views of the cable side and reel side showing other examples of the cable anchoring structure; FIG. 7 is a plan view showing the second embodiment of the present invention; FIG. 9 is a side view showing the third embodiment of the present invention. FIG. 10 is an explanatory diagram of the cable winding of the third embodiment.
1 is a plan view showing the fourth embodiment of the present invention, FIG. 12 is a plan view showing details of the connector part in FIG. Figure 14 is the first
FIG. 15 is a block diagram showing how the cable winding machines according to the fifth and sixth embodiments are used, and FIG. 16 is a block diagram showing how the cable winding machines according to the fifth and sixth embodiments are used. 17 is a front view showing the rotary reel drive mechanism in the embodiment shown in FIG. 16, FIG. 18 is an explanatory diagram for winding the cable in the embodiment shown in FIG. 16, and FIG. 19 is a side view showing the fifth embodiment. 20 is a side view showing a sixth embodiment of the present invention; FIG. 20 is a front view of the reel section showing a modification of the embodiment shown in FIG. 19; FIG.
1, (b) shows the welding current and voltage characteristics when the cable is wired in a straight line and in a coiled form, and Fig. 22 shows the configuration diagram of the cable connection corresponding to Fig. 21 (al). Fig. 23 is a configuration diagram of the cable connection corresponding to Fig. 21(b). 1--Take-up reel, 2.31--Frame, 3゜36-- --Cable folding claw, 4
．． 37-- Winding knob, 5, 5 A, 5 B-
-------One cable, 6-----Attachment member, 7-
・-Hook, 11--Male connector, 12-
------Female connector, 32---- Single shaft, 33
------- Fixed reel, 34.35...- Rotating reel, 38, 39-- Cable threading tool, 40.41
・-1--Gear, 42...-Internal gear, 44...
---Take-up reel, 45,453°45b-----
Pulley. Fig. 1 Fig. 21 Fig. 3 Fig. 14 Fig. 5ffl Fig. 6 Fig. 7R No. 881 Fig. 9 @loB Fig. 11 Fig. 12 Fig. 13 Fig. 14 Fig. 15 Fig. 16 WJ Fig. 817 Fig. ter s Fig. 19 Fig. 20WJ! No. 12 Figure Ot- No. 22 Jli

Claims (7)

[Claims] (1) In a cable winding machine in which a take-up reel for winding a cable is rotatably attached to a frame or a stand, an engaging member for securing a folded part such as an intermediate part of the cable is provided on the take-up reel. This cable winding machine is characterized by: (2) The cable winding machine according to claim 1, wherein the engaging member is a pin-shaped projection. (3) The cable winding device according to claim 1, wherein the locking member is a plate-shaped body mounted in a circumferential direction at the center of the reel body. (4) The cable winding device according to claim 1, wherein the engaging member is a connector provided on the reel body. (5) The cable winding device according to claim 1, wherein the engaging member is a pulley. (6) The hooking member includes a hook provided on the take-up reel, and a hook attached to the cable folding portion so as to be hookable to the hook. The cable winding machine described in section. (7) The take-up reel is divided into three parts, an intermediate part where the fastening member is provided, and both side parts, one of the both sides is fixed, and the other side part is attached rotatably, and the rotation thereof 2. The cable winding machine according to claim 1, wherein the cable winding machine transmits a reduced speed to the rotatably arranged intermediate section.